/* Skip link — accesibilidad */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  background: #0a0a0a;
  color: #fafaf8;
  padding: 0.6rem 1.2rem;
  border-radius: 0 0 8px 8px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: top 0.2s;
}
.skip-link:focus { top: 0; }

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --black: #0a0a0a;
  --white: #fafaf8;
  --gray: #6b6b6b;
  --light: #f0efeb;
  --accent: #1a1a1a;
  --green: #2d6a4f;
  --red: #c0392b;
  --amber: #e67e22;
  --border: #e0dfd9;
  --highlight: #fff3cd;
  --note-bg: #f7f6f2;
  /* Tokens de producto — superficies internas (cuadernos, IA, dashboards) */
  --product-deep: #2c2e7a;
  --product-accent: #6366cc;
  --product-soft: #eeeefa;
  --product-soft-2: #f5f5fc;
  --sc-glow-color: #a78bfa;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--white);
  color: var(--black);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── ICONS (line-art, hereda color del padre) ── */
.icon {
  width: 1em;
  height: 1em;
  display: inline-block;
  vertical-align: -0.18em;
  flex-shrink: 0;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.icon-lg { width: 1.6em; height: 1.6em; }
.icon-xl { width: 2.4em; height: 2.4em; }
.icon-inline { vertical-align: -0.15em; margin-right: 0.35em; }

/* ── NAVBAR ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(250, 250, 248, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: padding 0.6s cubic-bezier(0.5, 0, 0.2, 1), border-color 0.3s, background 0.3s, opacity 0.5s ease;
}

.navbar.scrolled {
  padding: 0.55rem 2rem;
  border-bottom-color: var(--border);
}


body.intro-locked .navbar,
body.intro-locked .floating-cta { opacity: 0; pointer-events: none; }
.floating-cta { transition: opacity 0.5s ease; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.82rem;
  color: var(--gray);
  text-decoration: none;
  font-weight: 400;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--black); }

/* "Dar mi opinión" — text link, not button */
.nav-link-feedback {
  font-size: 0.82rem !important;
  color: var(--gray) !important;
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: transparent;
  transition: color 0.2s, text-decoration-color 0.2s;
}
.nav-link-feedback:hover {
  color: var(--black) !important;
  text-decoration-color: currentColor;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
  color: var(--black);
}
.nav-toggle svg { width: 22px; height: 22px; display: block; }

@media (max-width: 768px) {
  .navbar { padding: 0.8rem 1.2rem; flex-wrap: wrap; }
  .nav-toggle { display: inline-flex; }
  .nav-links {
    display: none;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-top: 0.6rem;
    padding-top: 0.6rem;
    border-top: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-links li { padding: 0.7rem 0.2rem; border-bottom: 1px solid var(--border); }
  .nav-links li:last-child { border-bottom: none; padding-top: 1rem; }
  .nav-links a { font-size: 0.95rem; }
  .nav-link-feedback { display: inline-block; text-align: center; padding: 0.7rem 1.2rem; }
}

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 6rem 2rem 2rem;
  position: relative;
  background: var(--white);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, #e8e4dc 0%, transparent 70%);
  pointer-events: none;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--black);
  color: var(--white);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.4rem 1rem;
  border-radius: 100px;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeUp 0.6s ease 0.1s forwards;
}

/* Profile toggle */
.profile-toggle {
  display: inline-flex;
  position: relative;
  gap: 0;
  margin-bottom: 2.2rem;
  opacity: 0;
  animation: fadeUp 0.6s ease 0.15s forwards;
  background: var(--light);
  padding: 4px;
  border-radius: 9999px;
}

/* Píldora deslizante — posicionada vía JS */
.profile-pill {
  position: absolute;
  top: 4px;
  left: 0;
  height: calc(100% - 8px);
  background: var(--white);
  border-radius: 9999px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.10), 0 0 0 0.5px rgba(0,0,0,0.04);
  transition: left 0.3s cubic-bezier(0.5, 0, 0.2, 1),
              width 0.3s cubic-bezier(0.5, 0, 0.2, 1);
  pointer-events: none;
  will-change: left, width;
}

.profile-btn {
  font-family: 'Fraunces', Georgia, serif;
  font-optical-sizing: auto;
  font-variation-settings: "opsz" 72;
  font-size: 1.1rem;
  font-weight: 400;
  padding: 0.55rem 1.6rem;
  border-radius: 9999px;
  border: none;
  cursor: pointer;
  background: transparent;
  color: var(--gray);
  transition: color 0.25s;
  letter-spacing: -0.01em;
  position: relative;
  z-index: 1;
  white-space: nowrap;
}
.profile-btn.active {
  color: var(--black);
  font-weight: 500;
  font-style: italic;
}
.profile-btn:hover:not(.active) { color: var(--black); }
@media (max-width: 520px) {
  .profile-btn { font-size: 0.95rem; padding: 0.45rem 1.1rem; }
}

.hero h1 {
  font-family: 'Fraunces', Georgia, serif;
  font-size: clamp(2.6rem, 6.5vw, 5rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  max-width: 780px;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.2s forwards;
}

.hero h1 em {
  font-style: italic;
  color: var(--gray);
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--gray);
  max-width: 500px;
  line-height: 1.7;
  margin-bottom: 2.5rem;
  font-weight: 300;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.35s forwards;
}

.hero-ctas {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.5s forwards;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--black);
  color: var(--white);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.92rem;
  font-weight: 500;
  padding: 0.85rem 1.8rem;
  border-radius: 100px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, background 0.2s;
}

.cta-btn:hover { transform: translateY(-2px); background: #222; }
.cta-btn svg { transition: transform 0.2s; }
.cta-btn:hover svg { transform: translateX(3px); }

.cta-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--gray);
  text-decoration: none;
  padding: 0.85rem 1.2rem;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  transition: all 0.2s;
}

.cta-secondary:hover { border-color: var(--black); color: var(--black); }

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.72rem;
  color: var(--gray);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.8s forwards;
}

.scroll-hint::after {
  content: '';
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--gray), transparent);
  animation: scrollLine 1.5s ease infinite;
}

/* ── FLOATING CTA ── */
.floating-cta {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--black);
  color: var(--white);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.8rem 1.5rem;
  border-radius: 100px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
  transform: translateY(80px);
  opacity: 0;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease, background 0.2s;
  pointer-events: none;
}

.floating-cta.visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}

.floating-cta:hover { background: #222; }

@media (max-width: 600px) {
  .floating-cta { right: 1rem; bottom: 1rem; font-size: 0.8rem; padding: 0.7rem 1.2rem; }
}

/* ── DEMO SECTION ── */
.demo-section {
  padding: 6rem 2rem;
  background: var(--light);
  position: relative;
}

.section-label {
  text-align: center;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
}
.section-label::before, .section-label::after {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--border);
}

.section-title {
  font-family: 'Fraunces', Georgia, serif;
  font-size: clamp(2rem, 4.4vw, 3.2rem);
  text-align: center;
  margin-bottom: 1rem;
  letter-spacing: -0.025em;
  line-height: 1.1;
}
.section-title em {
  font-style: italic;
  color: var(--gray);
}

.section-sub {
  text-align: center;
  color: var(--gray);
  font-weight: 300;
  max-width: 540px;
  margin: 0 auto 3.5rem;
  line-height: 1.7;
  font-size: 0.98rem;
}

/* Demo nav — 2-level: profile selector + view chips */
.demo-profile-nav {
  text-align: center;
  margin-bottom: 1.5rem;
}

.demo-profile-btns {
  display: inline-flex;
  gap: 0.3rem;
  background: var(--light);
  padding: 0.3rem;
  border-radius: 100px;
  margin-bottom: 1rem;
}

.demo-profile-btn {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.45rem 1.1rem;
  border-radius: 100px;
  border: none;
  background: transparent;
  color: var(--gray);
  cursor: pointer;
  transition: background 0.18s, color 0.18s;
}

.demo-profile-btn.active {
  background: var(--black);
  color: var(--white);
}

.demo-profile-btn:hover:not(.active) {
  color: var(--black);
}

.demo-views-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  min-height: 36px;
}

.demo-tab {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.4rem 1rem;
  border-radius: 100px;
  border: 1.5px solid #c8c8c2;
  background: var(--white);
  cursor: pointer;
  color: var(--gray);
  transition: all 0.2s;
}

.demo-tab.active {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

.demo-tab:hover:not(.active) {
  border-color: var(--black);
  color: var(--black);
}

/* App frame */
.app-frame {
  max-width: 920px;
  margin: 0 auto;
  background: var(--white);
  border-radius: 20px;
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: 0 40px 80px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
}

.app-topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--white);
}

.app-dots { display: flex; gap: 6px; }
.app-dots span { width: 11px; height: 11px; border-radius: 50%; background: var(--border); }
.app-dots span:nth-child(1) { background: #ff6057; }
.app-dots span:nth-child(2) { background: #ffbd2e; }
.app-dots span:nth-child(3) { background: #28ca41; }

/* Wordmark mini — marca dentro del frame del prototipo */
.app-brand {
  display: inline-block;
  line-height: 0;
  color: var(--black);
  margin-left: 0.4rem;
}
.app-brand svg {
  display: block;
  width: 86px;
  height: auto;
  overflow: visible;
}
.app-brand .nb-mark {
  font-family: 'Fraunces', Georgia, serif;
  font-style: normal;
  font-optical-sizing: auto;
  font-variation-settings: "opsz" 96;
  font-weight: 500;
  font-size: 38px;
  fill: var(--black);
}

.app-tab {
  font-size: 0.78rem;
  color: var(--gray);
  background: var(--light);
  padding: 0.25rem 0.8rem;
  border-radius: 6px;
  margin-left: auto;
}

/* Screens — wrap del iframe que carga las pantallas reales del producto */
.app-iframe-wrap {
  width: 100%;
  height: 640px;
  background: var(--white);
  position: relative;
  overflow: hidden;
}
/* Preloaded iframes — all 6 stacked; switching = class toggle only, zero reload */
.proto-frame {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--white);
  opacity: 0;
  pointer-events: none;
  transition: opacity 80ms ease;
}
.proto-frame--active {
  opacity: 1;
  pointer-events: auto;
}
@media (max-width: 760px) {
  .app-iframe-wrap { height: 560px; }
}

/* Legacy — pantallas inline antiguas, mantenidas ocultas para no romper estilos previos.
   No se renderizan. Pueden eliminarse por completo más adelante. */
.screen { display: none; padding: 1.5rem; min-height: 460px; }
.screen.active { display: block; animation: screenFadeIn 0.3s ease; }

@keyframes screenFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

/* ─ Screen 0: Asignaturas ─ */
.welcome-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.2rem;
}

.welcome-info .welcome-sub { font-size: 0.78rem; color: var(--gray); }
.welcome-info .welcome-name { font-family: 'Fraunces', Georgia, serif; font-size: 1.3rem; }

.streak-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--product-soft);
  color: var(--product-deep);
  font-size: 0.72rem;
  font-weight: 500;
  padding: 0.3rem 0.8rem;
  border-radius: 100px;
}

.notification-bar {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 10px;
  padding: 0.7rem 1rem;
  margin-bottom: 1.2rem;
  font-size: 0.8rem;
  color: #991b1b;
}

.notification-bar .notif-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #ef4444;
  flex-shrink: 0;
}

.subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.8rem;
}

.subject-card {
  background: var(--light);
  border-radius: 14px;
  padding: 1.2rem 1rem;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  border: 1px solid transparent;
  position: relative;
}

.subject-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  border-color: var(--border);
}

.subject-icon { font-size: 1.4rem; margin-bottom: 0.6rem; color: var(--black); display: inline-flex; }
.subject-name { font-size: 0.85rem; font-weight: 500; margin-bottom: 0.2rem; }
.subject-meta { font-size: 0.72rem; color: var(--gray); margin-bottom: 0.6rem; }

.progress-bar-mini {
  width: 100%;
  height: 4px;
  background: rgba(0,0,0,0.06);
  border-radius: 100px;
  overflow: hidden;
}

.progress-bar-mini .fill {
  height: 100%;
  border-radius: 100px;
  background: var(--black);
  transition: width 0.8s ease;
}

.subject-pending {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ef4444;
}

/* ─ Screen 1: Cuadernos ─ */
.notebooks-header {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 1.2rem;
}

.back-btn {
  width: 30px; height: 30px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--white);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem;
  color: var(--gray);
  transition: background 0.2s;
}
.back-btn:hover { background: var(--light); }

.notebook-list { display: flex; flex-direction: column; gap: 0.6rem; margin-bottom: 1rem; }

.notebook-item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.9rem 1rem;
  background: var(--light);
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.2s;
}
.notebook-item:hover { background: #e8e6e0; }

.notebook-icon { font-size: 1.1rem; color: var(--black); display: inline-flex; }
.notebook-info { flex: 1; }
.notebook-title { font-size: 0.85rem; font-weight: 500; }
.notebook-detail { font-size: 0.72rem; color: var(--gray); margin-top: 0.15rem; display: flex; gap: 0.6rem; flex-wrap: wrap; }
.notebook-summary { font-size: 0.72rem; color: #888; margin-top: 0.2rem; font-style: italic; }

.notebook-progress {
  width: 42px; height: 42px;
  position: relative;
  flex-shrink: 0;
}

.notebook-progress svg {
  transform: rotate(-90deg);
  width: 42px;
  height: 42px;
}

.notebook-progress .pct-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--black);
}

.new-notebook-btn {
  width: 100%;
  padding: 0.8rem;
  border: 2px dashed var(--border);
  border-radius: 12px;
  background: transparent;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
  color: var(--gray);
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
.new-notebook-btn:hover { border-color: var(--black); color: var(--black); }

/* New notebook modal */
.modal-overlay {
  display: none;
  position: absolute;
  inset: 0;
  background: rgba(10,10,10,0.4);
  z-index: 10;
  align-items: center;
  justify-content: center;
  border-radius: 20px;
}

.modal-overlay.active { display: flex; }

.modal-box {
  background: var(--white);
  border-radius: 16px;
  padding: 2rem;
  width: 90%;
  max-width: 360px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.modal-box h4 {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
}

.modal-box p {
  font-size: 0.78rem;
  color: var(--gray);
  margin-bottom: 1rem;
}

.modal-input {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
  outline: none;
  margin-bottom: 0.8rem;
  background: var(--light);
}

.modal-input:focus { border-color: var(--black); }

.modal-actions {
  display: flex;
  gap: 0.5rem;
}

.modal-btn-primary {
  flex: 1;
  padding: 0.6rem;
  background: var(--black);
  color: var(--white);
  border: none;
  border-radius: 8px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
}

.modal-btn-secondary {
  flex: 1;
  padding: 0.6rem;
  background: var(--light);
  color: var(--gray);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.82rem;
  cursor: pointer;
}

/* ─ Screen 2: Cuaderno abierto ─ */
.notebook-open-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.8rem;
  flex-wrap: wrap;
}

.ai-mode-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.68rem;
  font-weight: 500;
  padding: 0.25rem 0.7rem;
  border-radius: 100px;
  margin-left: auto;
}

.ai-mode-strict {
  background: var(--product-soft);
  color: var(--product-deep);
  border: 1px solid color-mix(in srgb, var(--product-accent) 25%, transparent);
}

.notebook-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  height: 420px;
}

.notebook-layout-3 {
  grid-template-columns: 1fr 1fr 200px;
}

@media (max-width: 768px) {
  .notebook-layout, .notebook-layout-3 { grid-template-columns: 1fr; height: auto; }
}

.pdf-panel {
  background: var(--light);
  border-radius: 12px;
  padding: 1rem;
  overflow-y: auto;
  position: relative;
}

.pdf-label {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.pdf-content {
  font-size: 0.76rem;
  line-height: 1.85;
  color: #333;
}

.pdf-content h5 {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 0.95rem;
  font-weight: normal;
  margin: 0.8rem 0 0.4rem;
  color: var(--black);
}

.pdf-content h5:first-child { margin-top: 0; }

.pdf-highlight {
  background: var(--highlight);
  border-radius: 3px;
  padding: 1px 3px;
  cursor: pointer;
  position: relative;
  transition: background 0.2s;
  border-bottom: 2px solid #f0c040;
}

.pdf-highlight:hover {
  background: #ffe69c;
}

.pdf-highlight::after {
  content: '?';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  background: #f0c040;
  color: var(--black);
  font-size: 0.55rem;
  font-weight: 700;
  border-radius: 50%;
  margin-left: 3px;
  vertical-align: middle;
  opacity: 0;
  transition: opacity 0.2s;
}

.pdf-highlight:hover::after { opacity: 1; }

/* Chat panel */
.chat-panel {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.chat-header {
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.78rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

/* Avatar de Marco — "M" italic entre corchetes en círculo */
.marco-mark {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--black);
  color: var(--white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
}
.marco-mark svg { width: 70%; height: 70%; }
.marco-mark--online::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  border: 2px solid var(--white);
}
.marco-mark--soft {
  background: var(--white);
  color: var(--black);
  border: 1px solid var(--border);
}
.marco-mark--xs { width: 22px; height: 22px; }

.chat-header-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.chat-header-name { font-weight: 500; color: var(--black); }
.chat-header-mode {
  font-size: 0.65rem;
  color: var(--gray);
  font-weight: 400;
  letter-spacing: 0.02em;
}
.chat-header-badge {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.15rem 0.55rem;
  background: var(--product-soft);
  color: var(--product-deep);
  border-radius: 100px;
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.chat-header-badge .ai-dot { width: 6px; height: 6px; background: var(--product-deep); }

.ai-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse 2s ease infinite;
}

.chat-messages {
  flex: 1;
  padding: 0.8rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.msg {
  max-width: 88%;
  padding: 0.6rem 0.8rem;
  border-radius: 12px;
  font-size: 0.76rem;
  line-height: 1.65;
}

.msg.user {
  align-self: flex-end;
  background: var(--product-deep);
  color: var(--white);
  border-bottom-right-radius: 4px;
}

.msg.ai {
  align-self: flex-start;
  background: var(--white);
  color: var(--accent);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.msg .thinking {
  font-size: 0.68rem;
  color: var(--gray);
  font-style: italic;
  display: block;
  margin-top: 0.3rem;
}

.chat-input-area {
  padding: 0.6rem;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 0.4rem;
}

.chat-input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.45rem 0.7rem;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.78rem;
  outline: none;
  background: var(--light);
}

.chat-send {
  width: 32px; height: 32px;
  border-radius: 8px;
  border: none;
  background: var(--product-deep);
  color: var(--white);
  cursor: pointer;
  font-size: 0.85rem;
  display: flex; align-items: center; justify-content: center;
}

/* Notes panel */
.notes-panel {
  background: var(--note-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.8rem;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.notes-header {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.note-item {
  font-size: 0.72rem;
  line-height: 1.6;
  color: #555;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}

.note-item:last-child { border-bottom: none; }

.note-item .note-time {
  font-size: 0.62rem;
  color: #aaa;
  display: block;
  margin-top: 0.15rem;
}

.add-note-btn {
  margin-top: auto;
  padding: 0.4rem;
  border: 1px dashed var(--border);
  border-radius: 6px;
  background: transparent;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.7rem;
  color: var(--gray);
  cursor: pointer;
}

/* ─ Screen 3: Panel profesor ─ */
.teacher-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 1.2rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.teacher-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.8rem;
  margin-bottom: 1.2rem;
}

@media (max-width: 700px) { .teacher-grid { grid-template-columns: repeat(2, 1fr); } }

.stat-card {
  background: var(--light);
  border-radius: 12px;
  padding: 1rem;
}

.stat-value {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 1.7rem;
  letter-spacing: -0.02em;
}

.stat-label { font-size: 0.7rem; color: var(--gray); margin-top: 0.15rem; }

.stat-change {
  font-size: 0.65rem;
  font-weight: 500;
  margin-top: 0.3rem;
}

.stat-change.up { color: var(--green); }
.stat-change.down { color: var(--red); }

.teacher-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 700px) { .teacher-columns { grid-template-columns: 1fr; } }

.teacher-card {
  background: var(--light);
  border-radius: 12px;
  padding: 1rem;
}

.teacher-card-title {
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

/* Heatmap visual */
.heatmap-doc {
  background: var(--white);
  border-radius: 8px;
  padding: 0.8rem;
  border: 1px solid var(--border);
}

.heatmap-doc-line {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.2rem;
  font-size: 0.72rem;
  transition: background 0.2s;
}

.heat-high { background: #fecaca; color: #991b1b; }
.heat-med { background: #fed7aa; color: #9a3412; }
.heat-low { background: #fef9c3; color: #854d0e; }
.heat-ok { background: #dcfce7; color: #166534; }

.heat-indicator {
  width: 10px; height: 10px;
  border-radius: 3px;
  flex-shrink: 0;
}

.heat-high .heat-indicator { background: #ef4444; }
.heat-med .heat-indicator { background: #f97316; }
.heat-low .heat-indicator { background: #eab308; }
.heat-ok .heat-indicator { background: #22c55e; }

.heatmap-legend {
  display: flex;
  gap: 0.8rem;
  margin-top: 0.6rem;
  font-size: 0.65rem;
  color: var(--gray);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.legend-dot {
  width: 8px; height: 8px;
  border-radius: 2px;
}

/* Students at risk */
.student-risk-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}

.student-risk-item:last-child { border-bottom: none; }

.student-avatar {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--gray);
  flex-shrink: 0;
}

.student-risk-info { flex: 1; }
.student-risk-name { font-size: 0.78rem; font-weight: 500; }
.student-risk-detail { font-size: 0.68rem; color: var(--gray); }

.student-risk-action {
  font-size: 0.68rem;
  color: var(--black);
  text-decoration: underline;
  cursor: pointer;
}

/* Activity feed */
.feed-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.4rem 0;
  font-size: 0.72rem;
  color: #555;
  border-bottom: 1px solid rgba(0,0,0,0.04);
}

.feed-item:last-child { border-bottom: none; }

.feed-time {
  font-size: 0.65rem;
  color: #aaa;
  white-space: nowrap;
  flex-shrink: 0;
  min-width: 55px;
}

/* ─ Screen 4: Quiz ─ */
.quiz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.2rem;
}

.quiz-progress-text {
  font-size: 0.75rem;
  color: var(--gray);
}

.quiz-progress-bar {
  width: 120px;
  height: 4px;
  background: var(--border);
  border-radius: 100px;
  overflow: hidden;
}

.quiz-progress-bar .fill {
  height: 100%;
  background: var(--green);
  border-radius: 100px;
  transition: width 0.5s ease;
}

.quiz-question-card {
  background: var(--light);
  border-radius: 16px;
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.quiz-q-num {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--gray);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.quiz-q-text {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 1.1rem;
  line-height: 1.5;
  margin-bottom: 1.2rem;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.8rem 1rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.82rem;
}

.quiz-option:hover { border-color: var(--black); }

.quiz-option .opt-letter {
  width: 24px; height: 24px;
  border-radius: 6px;
  background: var(--light);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.72rem;
  font-weight: 600;
  flex-shrink: 0;
}

.quiz-option.selected {
  border-color: var(--black);
  background: var(--black);
  color: var(--white);
}

.quiz-option.selected .opt-letter {
  background: var(--white);
  color: var(--black);
}

.quiz-option.wrong {
  border-color: #ef4444;
  background: #fef2f2;
  color: #991b1b;
}

.quiz-option.wrong .opt-letter { background: #fecaca; color: #991b1b; }

.quiz-option.correct {
  border-color: var(--green);
  background: #f0fdf4;
  color: #166534;
}

.quiz-option.correct .opt-letter { background: #dcfce7; color: #166534; }

.quiz-feedback {
  background: var(--light);
  border-radius: 12px;
  padding: 1rem;
  font-size: 0.8rem;
  line-height: 1.7;
  display: none;
}

.quiz-feedback.visible { display: block; animation: fadeUp 0.3s ease; }

.quiz-feedback-header {
  font-weight: 500;
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

/* ── FEATURES ── */
.features-section {
  padding: 6rem 2rem;
  background: var(--white);
}

.features-grid {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.2rem;
}

.feature-card {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.06);
}

.feature-for {
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 0.6rem;
}

.feature-emoji { font-size: 1.6rem; margin-bottom: 1rem; color: var(--black); display: inline-flex; }
.feature-title { font-size: 0.92rem; font-weight: 500; margin-bottom: 0.4rem; }
.feature-desc { font-size: 0.8rem; color: var(--gray); line-height: 1.7; font-weight: 300; }

/* ── PROFESSOR SECTION ── */
.professor-section {
  padding: 5rem 2rem;
  background: var(--light);
}

.prof-grid {
  max-width: 860px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

@media (max-width: 700px) { .prof-grid { grid-template-columns: 1fr; } }

.prof-content h3 {
  font-family: 'Fraunces', Georgia, serif;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.prof-content p {
  font-size: 0.9rem;
  color: var(--gray);
  line-height: 1.8;
  font-weight: 300;
  margin-bottom: 1.5rem;
}

.prof-features {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.prof-feature {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
}

.prof-feature-icon {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: var(--white);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.prof-feature-text h4 {
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.15rem;
}

.prof-feature-text p {
  font-size: 0.78rem;
  color: var(--gray);
  line-height: 1.6;
  margin-bottom: 0;
}

.prof-visual {
  background: var(--white);
  border-radius: 16px;
  border: 1px solid var(--border);
  padding: 1.5rem;
  box-shadow: 0 20px 60px rgba(0,0,0,0.06);
}

/* ── SOCIAL PROOF ── */
.proof-section {
  padding: 5rem 2rem;
  background: var(--white);
}

.proof-grid {
  max-width: 860px;
  margin: 2.5rem auto 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.2rem;
}

.proof-card {
  background: var(--light);
  border-radius: 16px;
  padding: 1.5rem;
}

.proof-quote {
  font-size: 0.88rem;
  line-height: 1.7;
  font-style: italic;
  color: #444;
  margin-bottom: 1rem;
}

.proof-author {
  font-size: 0.78rem;
  font-weight: 500;
}

.proof-role {
  font-size: 0.7rem;
  color: var(--gray);
}

.logos-section {
  max-width: 700px;
  margin: 3rem auto 0;
  text-align: center;
}

.logos-label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 1.5rem;
}

.logos-row {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  flex-wrap: wrap;
  align-items: center;
}

.proof-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  align-items: flex-end;
  text-align: center;
}
.proof-stat-num {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 2.6rem;
  font-style: italic;
  line-height: 1;
  margin-bottom: 0.4rem;
}
.proof-stat-label {
  font-size: 0.72rem;
  color: var(--gray);
  letter-spacing: 0.02em;
}
.proof-stat-cta .proof-stat-num { font-style: normal; opacity: 0.55; }
.proof-stat-cta .proof-stat-num a:hover { opacity: 1; }
@media (max-width: 600px) {
  .proof-stats { gap: 2rem; }
  .proof-stat-num { font-size: 2rem; }
}

.logo-placeholder {
  width: 120px;
  height: 44px;
  background: var(--light);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  color: #bbb;
  font-weight: 500;
  letter-spacing: 0.05em;
}

/* ── FORM ── */
.form-section {
  padding: 5rem 2rem;
  background: var(--black);
  color: var(--white);
}

.form-section .section-label { color: #888; }
.form-section .section-label::before, .form-section .section-label::after { background: #333; }
.form-section .section-title { color: var(--white); }
.form-section .section-sub { color: #888; }

.form-wrap {
  max-width: 580px;
  margin: 0 auto;
}

/* Form progress */
.form-progress {
  display: flex;
  gap: 4px;
  margin-bottom: 2rem;
}

.form-progress-step {
  flex: 1;
  height: 3px;
  background: #2a2a2a;
  border-radius: 100px;
  transition: background 0.4s;
}

.form-progress-step.active { background: var(--white); }

.form-step { display: none; }
.form-step.active { display: block; animation: fadeUp 0.4s ease; }

.form-group { margin-bottom: 1.2rem; }

.form-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  margin-bottom: 0.4rem;
  color: #ccc;
}

.form-label-hint {
  font-weight: 300;
  color: #777;
  font-size: 0.72rem;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  background: #161616;
  border: 1px solid #2a2a2a;
  border-radius: 10px;
  padding: 0.7rem 0.9rem;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
  color: var(--white);
  outline: none;
  transition: border-color 0.2s;
  appearance: none;
}

.form-input:focus, .form-select:focus, .form-textarea:focus { border-color: #555; }
.form-select option { background: #161616; }
.form-textarea { resize: vertical; min-height: 80px; line-height: 1.6; }

.rating-group { display: flex; gap: 0.4rem; }

.rating-btn {
  flex: 1;
  min-width: 36px;
  padding: 0.55rem;
  background: #161616;
  border: 1px solid #2a2a2a;
  border-radius: 8px;
  color: #888;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.82rem;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s;
}

.rating-btn:hover, .rating-btn.selected {
  background: var(--white);
  color: var(--black);
  border-color: var(--white);
}

.checkbox-group { display: flex; flex-direction: column; gap: 0.5rem; }

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.6rem 0.8rem;
  background: #161616;
  border: 1px solid #2a2a2a;
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.2s;
  font-size: 0.82rem;
  color: #ccc;
}

.checkbox-item input { accent-color: var(--white); width: 15px; height: 15px; }
.checkbox-item:hover { border-color: #444; }

.scale-group {
  display: flex;
  gap: 0.3rem;
}

.scale-btn {
  flex: 1;
  padding: 0.5rem 0.2rem;
  background: #161616;
  border: 1px solid #2a2a2a;
  border-radius: 6px;
  color: #888;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.75rem;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s;
}

.scale-btn:hover, .scale-btn.selected {
  background: var(--white);
  color: var(--black);
  border-color: var(--white);
}

.scale-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.65rem;
  color: #555;
  margin-top: 0.3rem;
}

.form-nav {
  display: flex;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.form-btn-next {
  flex: 1;
  padding: 0.85rem;
  background: var(--white);
  color: var(--black);
  border: none;
  border-radius: 100px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.2s, opacity 0.2s;
}

.form-btn-next:hover { transform: translateY(-2px); opacity: 0.9; }

.form-btn-back {
  padding: 0.85rem 1.5rem;
  background: transparent;
  color: #888;
  border: 1px solid #333;
  border-radius: 100px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  cursor: pointer;
  transition: border-color 0.2s;
}

.form-btn-back:hover { border-color: #666; color: #ccc; }

/* Summary */
.form-summary {
  background: #161616;
  border-radius: 12px;
  padding: 1.2rem;
  margin-bottom: 1.5rem;
}

.summary-item {
  display: flex;
  justify-content: space-between;
  padding: 0.4rem 0;
  border-bottom: 1px solid #222;
  font-size: 0.78rem;
}

.summary-item:last-child { border-bottom: none; }

.summary-label { color: #777; }
.summary-value { color: #ccc; text-align: right; max-width: 60%; }

/* Thank you */
.thankyou {
  display: none;
  text-align: center;
  padding: 3rem 0;
}

.thankyou-icon { font-size: 2.2rem; margin-bottom: 1rem; color: var(--black); display: inline-flex; justify-content: center; }
.thankyou h3 {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
}
.thankyou p { color: #888; font-weight: 300; font-size: 0.9rem; line-height: 1.7; }

.thankyou .email-confirm {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: #161616;
  border: 1px solid #2a2a2a;
  border-radius: 10px;
  padding: 0.7rem 1.2rem;
  margin-top: 1.2rem;
  font-size: 0.8rem;
  color: #aaa;
}

/* ── FOOTER ── */
.footer {
  padding: 3.5rem 2rem 2rem;
  background: var(--white);
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--gray);
}
.footer-grid {
  max-width: 1080px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}
@media (max-width: 720px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
@media (max-width: 420px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-brand {
  display: inline-block;
  margin-bottom: 0.85rem;
  line-height: 0;
}
.footer-brand .nav-brand { color: var(--gray); }
.footer-brand .nb-mark,
.footer-brand .nb-arco { fill: currentColor; }
.footer-tagline {
  line-height: 1.6;
  max-width: 240px;
  font-weight: 300;
}
.footer-col-title {
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--black);
  margin-bottom: 1rem;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.footer-links a {
  color: var(--gray);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-links a:hover { color: var(--black); }
.footer-bottom {
  max-width: 1080px;
  margin: 0 auto;
  padding-top: 1.8rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.72rem;
}
.footer-bottom-links {
  display: flex;
  gap: 1.5rem;
}
.footer-bottom-links a {
  color: var(--gray);
  text-decoration: none;
}
.footer-bottom-links a:hover { color: var(--black); }

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* Hidden */
.hidden { display: none !important; }

/* Responsive */
@media (max-width: 600px) {
  .hero { padding: 5rem 1.2rem 2rem; }
  .hero h1 { font-size: 2.2rem; }
  .hero-sub { font-size: 0.95rem; }
  .demo-section, .features-section, .form-section, .proof-section, .professor-section {
    padding: 3.5rem 1.2rem;
  }
  .subjects-grid { grid-template-columns: repeat(2, 1fr); }
  .proof-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .prof-grid { grid-template-columns: 1fr; }
}

/* ── INTRO SPLASH ── */
.intro-splash {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  transition: opacity 0.5s ease;
}
.intro-splash-scaler {
  transform: scale(3);
  transform-origin: center center;
}
@media (max-width: 520px) {
  .intro-splash-scaler { transform: scale(2); }
}
.intro-splash.intro-done { opacity: 0; }
body.intro-locked { overflow: hidden; }

/* Contenido de página oculto hasta que el intro termina */
.hero { transition: opacity 0.7s ease; }
body:not(.page-ready) .hero { opacity: 0; }
body:not(.page-ready) .badge,
body:not(.page-ready) .profile-toggle,
body:not(.page-ready) .hero h1,
body:not(.page-ready) .hero-sub,
body:not(.page-ready) .scroll-hint {
  animation-play-state: paused !important;
}

@media (prefers-reduced-motion: reduce) {
  .intro-splash { display: none !important; }
  body:not(.page-ready) .hero { opacity: 1; }
}

/* ── MICRO-COMPROMISO ── */

/* ── PROOF: CARD FEATURED + TAG ── */
.proof-grid {
  grid-template-columns: repeat(2, 1fr);
}
.proof-card-tag {
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 0.9rem;
  opacity: 0.7;
}
.proof-card--featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto auto;
  gap: 0 2rem;
  background: var(--black);
  border-left-color: var(--black);
}
.proof-card--featured .proof-card-tag {
  color: rgba(255,255,255,0.45);
  grid-column: 1;
}
.proof-card--featured .proof-quote {
  color: var(--white);
  font-size: 1.08rem;
  font-style: italic;
  grid-column: 1;
  max-width: 56ch;
}
.proof-card--featured .proof-author {
  color: var(--white);
  grid-column: 1;
}
.proof-card--featured .proof-role {
  color: rgba(255,255,255,0.45);
  grid-column: 1;
}

@media (max-width: 640px) {
  .proof-grid { grid-template-columns: 1fr; }
  .proof-card--featured { grid-column: auto; display: block; }
}

/* ── FORM SECTION — LAYOUT 2 COLUMNAS ── */
.form-section-inner {
  max-width: 1020px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}
.form-section-left .section-label { margin-bottom: 0.6rem; }
.form-section-left .section-title { margin-bottom: 1rem; }
.form-section-left .section-sub { font-size: 0.92rem; line-height: 1.6; }

/* Urgency bar */
.form-pilot-perks {
  margin-top: 2rem;
  display: flex; flex-direction: column; gap: var(--space-3);
}
.form-pilot-perk {
  display: flex; align-items: flex-start; gap: var(--space-3);
  font-size: var(--text-sm); color: rgba(255,255,255,0.8); line-height: var(--leading-snug);
}
.form-pilot-perk svg { flex-shrink: 0; margin-top: 2px; stroke: rgba(255,255,255,0.5); }
.form-urgency-bar {
  margin-top: 2rem;
  padding: 1.2rem 1.4rem;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 12px;
}
.form-urgency-slots {
  font-size: 0.82rem;
  margin-bottom: 0.7rem;
  display: flex;
  align-items: baseline;
  gap: 0.2rem;
}
.form-urgency-filled {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: 'Fraunces', Georgia, serif;
  font-style: italic;
  color: var(--white);
  line-height: 1;
}
.form-urgency-total { color: rgba(255,255,255,0.55); }
.form-urgency-track {
  height: 4px;
  background: rgba(255,255,255,0.12);
  border-radius: 100px;
  margin-bottom: 0.6rem;
  overflow: hidden;
}
.form-urgency-fill {
  height: 100%;
  background: var(--white);
  border-radius: 100px;
  transition: width 1s cubic-bezier(0.16,1,0.3,1);
}
.form-urgency-label {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.4);
  margin: 0;
}

/* Trust list lateral */
.form-trust-list {
  margin-top: 1.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.form-trust-item {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.45);
}
.form-trust-item svg { flex-shrink: 0; stroke: rgba(255,255,255,0.35); }

/* Ocultar form-wrap trust strip anterior */
.form-wrap .form-trust { display: none; }

@media (max-width: 860px) {
  .form-section-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .form-section-left .section-title { font-size: 1.8rem; }
  .form-urgency-bar { max-width: 480px; }
}

/* ── FLOAT EMAIL CAPTURE ── */
.float-capture {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 300px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.4rem 1.5rem 1.2rem;
  box-shadow: 0 12px 40px rgba(0,0,0,0.12), 0 2px 8px rgba(0,0,0,0.06);
  z-index: 900;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.16,1,0.3,1);
}
.float-capture.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.float-capture.dismissed { display: none; }
.float-capture-close {
  position: absolute;
  top: 0.7rem;
  right: 0.9rem;
  background: none;
  border: none;
  font-size: 1rem;
  color: var(--gray);
  cursor: pointer;
  line-height: 1;
  padding: 0.2rem;
}
.float-capture-close:hover { color: var(--black); }
.float-capture-title {
  font-family: 'Fraunces', Georgia, serif;
  font-style: italic;
  font-size: 1.05rem;
  color: var(--black);
  letter-spacing: -0.01em;
  margin-bottom: 0.25rem;
}
.float-capture-sub {
  font-size: 0.76rem;
  color: var(--gray);
  margin-bottom: 1rem;
  line-height: 1.45;
}
.float-capture-form {
  display: flex;
  gap: 0.4rem;
}
.float-capture-input {
  flex: 1;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.8rem;
  padding: 0.55rem 0.8rem;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--white);
  color: var(--black);
  outline: none;
  transition: border-color 0.2s;
}
.float-capture-input:focus { border-color: var(--black); }
.float-capture-input::placeholder { color: var(--gray); }
.float-capture-btn {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.55rem 0.9rem;
  background: var(--black);
  color: var(--white);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s;
}
.float-capture-btn:hover { background: var(--accent); }
.float-capture-fine {
  font-size: 0.66rem;
  color: var(--gray);
  opacity: 0.6;
  margin-top: 0.6rem;
  text-align: center;
}
.float-capture-done .float-capture-title { color: var(--green); }
.float-capture-done .float-capture-sub { display: none; }
.float-capture-done .float-capture-form { display: none; }

@media (max-width: 480px) {
  .float-capture { width: calc(100vw - 2rem); right: 1rem; bottom: 1rem; }
}

/* Desktop: muestra float-capture (card email), oculta pill */
@media (min-width: 769px) {
  .floating-cta { display: none !important; }
}
/* Móvil: muestra floating-cta (pill), oculta card email */
@media (max-width: 768px) {
  .float-capture { display: none !important; }
}

/* ── HERO: SOCIAL PROOF BADGE + TIMING ── */
.hero-proof-strip {
  display: inline-flex;
  align-items: center;
  gap: 1.2rem;
  margin-bottom: 1.8rem;
  opacity: 0;
  animation: fadeUp 0.5s ease 0.4s forwards;
}
.hero-proof-count {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--black);
}
.hero-proof-avatars {
  display: flex;
}
.hero-proof-avatars span {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--white);
  font-size: 0.58rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--white);
  margin-left: -7px;
  letter-spacing: 0;
}
.hero-proof-avatars span:first-child { margin-left: 0; }
.hero-proof-sep { width: 1px; height: 16px; background: var(--border); }
.hero-timing-pill {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--gray);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.hero-timing-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #f59e0b;
  flex-shrink: 0;
  animation: pulse-amber 2s ease infinite;
}
@keyframes pulse-amber {
  0%,100% { opacity:1; transform:scale(1); }
  50% { opacity:0.45; transform:scale(0.8); }
}

/* ── HERO: CTA único ── */
.hero-ctas-single { display: flex; flex-direction: column; align-items: center; gap: 1.2rem; margin-top: 1.5rem; }
.hero-cta-text-link {
  font-size: 0.8rem;
  color: var(--gray);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: color 0.2s;
}
.hero-cta-text-link:hover { color: var(--black); }


/* ── FAQ ── */
.faq-section {
  padding: 5rem 2rem;
  background: var(--light);
  border-top: 1px solid var(--border);
}
.faq-tabs {
  display: flex; justify-content: center; gap: var(--space-2);
  margin-top: var(--space-6);
}
.faq-tab {
  padding: var(--space-2) var(--space-5);
  font-family: var(--font-sans); font-size: var(--text-sm); font-weight: var(--weight-medium);
  border-radius: var(--radius-pill); border: 1.5px solid var(--border);
  background: transparent; color: var(--gray); cursor: pointer;
  transition: all var(--duration-fast) var(--ease-soft);
}
.faq-tab:hover { color: var(--black); border-color: var(--accent); }
.faq-tab.active { background: var(--black); color: var(--white); border-color: var(--black); }
.faq-group { display: none; }
.faq-group.active { display: flex; flex-direction: column; gap: 0; }
.faq-item.open .faq-a { max-height: 400px; padding-bottom: 1.2rem; }
.faq-grid {
  max-width: 720px;
  margin: 2.5rem auto 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.faq-item {
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.faq-item:first-child { border-top: 1px solid var(--border); }
.faq-q {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: 1.2rem 0;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--black);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.faq-q-icon {
  flex-shrink: 0;
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  transition: transform 0.3s, border-color 0.2s;
  font-size: 0.85rem;
  color: var(--gray);
}
.faq-item.open .faq-q-icon { transform: rotate(45deg); border-color: var(--black); color: var(--black); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.38s cubic-bezier(0.16,1,0.3,1), padding 0.3s;
  font-size: 0.88rem;
  color: var(--gray);
  line-height: 1.65;
}
.faq-item.open .faq-a { max-height: 300px; padding-bottom: 1.2rem; }
.faq-a a { color: var(--black); }

/* ── QUOTE ENCIMA DEL FORM ── */
.form-director-quote {
  background: transparent;
  border-left: 3px solid rgba(255,255,255,0.25);
  padding: 1.2rem 0 1.2rem 1.2rem;
  margin-top: 2rem;
}
.form-director-quote blockquote {
  font-family: 'Fraunces', Georgia, serif;
  font-style: italic;
  font-size: 1rem;
  color: rgba(255,255,255,0.8);
  line-height: 1.5;
  margin-bottom: 0.5rem;
}
.form-director-quote cite {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.38);
  font-style: normal;
  letter-spacing: 0.04em;
}

/* ── FORM SIMPLIFICADO: 4 campos ── */
.form-simple { display: flex; flex-direction: column; gap: 1rem; }
.form-simple-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem; }
.form-submit-row { display: flex; flex-direction: column; gap: 0.6rem; margin-top: 0.5rem; }
.form-submit-btn {
  width: 100%;
  padding: 0.95rem 1.5rem;
  background: var(--white);
  color: var(--black);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  border: none;
  border-radius: 100px;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s cubic-bezier(0.34,1.56,0.64,1);
  letter-spacing: 0.01em;
}
.form-submit-btn:hover { background: #eee; transform: translateY(-2px); }
.form-submit-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.68rem;
  color: rgba(255,255,255,0.32);
}
.form-submit-trust svg { flex-shrink: 0; stroke: rgba(255,255,255,0.28); }

@media (max-width: 480px) {
  .form-simple-row { grid-template-columns: 1fr; }
}

/* ── PROTOTIPO SHOWCASE ── */
.showcase-section {
  background: var(--black);
  color: var(--white);
  min-height: 350vh;
  position: relative;
}

.showcase-sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2.5rem 2rem 4rem;
  gap: 1.5rem;
  overflow: hidden;
}

.showcase-header {
  text-align: center;
  flex-shrink: 0;
}

.showcase-eyebrow {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(250,250,248,0.4);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
}
.showcase-eyebrow::before, .showcase-eyebrow::after {
  content: '';
  width: 20px;
  height: 1px;
  background: rgba(250,250,248,0.2);
}

.showcase-title {
  font-family: 'Fraunces', Georgia, serif;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--white);
}
.showcase-title em {
  font-style: italic;
  color: rgba(250,250,248,0.45);
}

.showcase-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3.5rem;
  max-width: 960px;
  width: 100%;
}

/* ── Browser window (replaces phone mockup) ── */
.showcase-window-wrap {
  flex-shrink: 0;
}

.showcase-window {
  width: 490px;
  height: 345px;
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.03),
    0 4px 12px rgba(0,0,0,0.5),
    0 20px 48px rgba(0,0,0,0.65),
    0 40px 80px rgba(0,0,0,0.45);
}

/* Chrome bar */
.sw-chrome {
  height: 34px;
  background: #1e1e1c;
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 10px;
  flex-shrink: 0;
}
.sw-traffic { display: flex; gap: 6px; align-items: center; flex-shrink: 0; }
.sw-tlight { width: 11px; height: 11px; border-radius: 50%; }
.sw-tlight.sw-red    { background: #ff5f57; }
.sw-tlight.sw-yellow { background: #ffbd2e; }
.sw-tlight.sw-green  { background: #28c840; }

.sw-url-bar {
  flex: 1;
  height: 22px;
  background: rgba(255,255,255,0.08);
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0 8px;
  overflow: hidden;
}
.sw-url-icon {
  width: 9px; height: 9px; flex-shrink: 0;
  stroke: rgba(255,255,255,0.35); fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}
.sw-url-text {
  font-family: 'DM Sans', sans-serif;
  font-size: 10px;
  color: rgba(255,255,255,0.5);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0.01em;
  max-width: 340px;
}
.sw-chrome-actions { display: flex; gap: 6px; flex-shrink: 0; }
.sw-chrome-btn { width: 22px; height: 22px; border-radius: 5px; background: rgba(255,255,255,0.07); }

/* App: sidebar + main */
.sw-app { display: flex; flex: 1; min-height: 0; }

.sw-sidebar {
  width: 48px;
  background: #111110;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 0;
  gap: 4px;
  flex-shrink: 0;
  border-right: 1px solid rgba(255,255,255,0.05);
}
.sw-brand-dot {
  width: 26px; height: 26px; border-radius: 7px;
  background: var(--product-deep);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Fraunces', Georgia, serif; font-style: italic;
  font-size: 13px; color: #fff; margin-bottom: 6px;
}
.sw-sep { width: 24px; height: 1px; background: rgba(255,255,255,0.07); margin: 3px 0; }
.sw-nav-btn {
  width: 32px; height: 32px; border-radius: 8px;
  background: transparent; border: none; cursor: default;
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.28);
}
.sw-nav-btn.sw-active { background: rgba(99,102,204,0.22); color: var(--product-accent); }
.sw-nav-btn svg {
  width: 15px; height: 15px; stroke: currentColor; fill: none;
  stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round;
}

.sw-main { flex: 1; position: relative; overflow: hidden; background: #fafaf8; min-width: 0; }

/* Panels stacked; GSAP controls opacity */
.showcase-panel {
  position: absolute; inset: 0; opacity: 0;
  pointer-events: none; display: flex; flex-direction: column; overflow: hidden;
}
.showcase-panel.sp-active { opacity: 1; }

/* App top nav (panels 1 & 2) */
.sw-app-nav {
  height: 36px; background: #fff;
  border-bottom: 1px solid #e8e7e1;
  display: flex; align-items: center;
  padding: 0 10px; gap: 7px; flex-shrink: 0;
}
.sw-breadcrumb {
  font-size: 9.5px; color: #6b6b6b; display: flex; align-items: center; gap: 3px;
}
.sw-breadcrumb span { color: #0a0a0a; font-weight: 500; }
.sw-breadcrumb-sep { opacity: 0.4; }
.sw-nav-right { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.sw-avatar-sm {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--product-deep); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 9px; font-family: 'Fraunces', Georgia, serif; font-style: italic;
}
.sw-status-pill {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 8.5px; font-weight: 600; letter-spacing: 0.04em;
  padding: 2px 7px; border-radius: 100px;
}
.sw-status-pill.alert { color: #c0392b; background: rgba(192,57,43,0.09); border: 1px solid rgba(192,57,43,0.18); }
.sw-status-pill.ok    { color: #2d6a4f; background: rgba(45,106,79,0.09); border: 1px solid rgba(45,106,79,0.18); }
.sw-status-dot { width: 5px; height: 5px; border-radius: 50%; background: currentColor; }

/* Cuaderno split (panels 1 & 2) */
.sw-cuaderno { display: flex; flex: 1; min-height: 0; overflow: hidden; }

.sw-nb {
  flex: 1; overflow: hidden; padding: 9px 11px;
  border-right: 1px solid #e8e7e1; display: flex; flex-direction: column; gap: 5px;
}
.sw-nb-subject {
  font-size: 8.5px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--product-accent); background: var(--product-soft);
  display: inline-block; padding: 2px 6px; border-radius: 100px;
}
.sw-nb-title {
  font-family: 'Fraunces', Georgia, serif; font-style: italic;
  font-size: 13.5px; color: #0a0a0a; letter-spacing: -0.02em; line-height: 1.2;
}
.sw-nb-body { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.sw-nb-line { height: 6px; border-radius: 3px; background: #e8e7e1; }
.sw-nb-line.w-full { width: 100%; } .sw-nb-line.w-90 { width: 90%; }
.sw-nb-line.w-75 { width: 75%; }   .sw-nb-line.w-60 { width: 60%; }
.sw-nb-callout {
  background: var(--product-soft); border-left: 2px solid var(--product-accent);
  border-radius: 0 6px 6px 0; padding: 5px 8px; margin: 2px 0;
}
.sw-nb-callout-label {
  font-size: 7.5px; font-weight: 700; letter-spacing: 0.07em; text-transform: uppercase;
  color: var(--product-accent); margin-bottom: 2px;
}
.sw-nb-callout-text { font-size: 8.5px; color: var(--product-deep); line-height: 1.4; }
.sw-nb-active-badge {
  font-size: 7.5px; font-weight: 700; color: var(--product-accent);
  letter-spacing: 0.07em; text-transform: uppercase;
  border: 1px dashed var(--product-accent); border-radius: 4px;
  padding: 2px 5px; display: inline-block; background: rgba(99,102,204,0.05);
  margin-top: 2px;
}

.sw-chat-col {
  width: 158px; flex-shrink: 0; display: flex; flex-direction: column;
  background: #f5f5fc; overflow: hidden;
}
.sw-chat-head {
  height: 33px; border-bottom: 1px solid #e0dfd9;
  display: flex; align-items: center; gap: 6px; padding: 0 8px;
  background: #fff; flex-shrink: 0;
}
.sw-chat-av {
  width: 20px; height: 20px; border-radius: 50%; background: #0a0a0a;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Fraunces', Georgia, serif; font-style: italic;
  font-size: 9px; color: #fff; flex-shrink: 0; position: relative;
}
.sw-chat-av::after {
  content: ''; position: absolute; bottom: -1px; right: -1px;
  width: 7px; height: 7px; border-radius: 50%;
  background: #2d6a4f; border: 1.5px solid #fafaf8;
}
.sw-chat-name { font-size: 9px; font-weight: 700; color: #0a0a0a; letter-spacing: -0.01em; }
.sw-chat-sub  { font-size: 7.5px; color: #6b6b6b; }
.sw-chat-messages {
  flex: 1; padding: 7px 7px; display: flex; flex-direction: column;
  gap: 4px; overflow: hidden;
}
.sw-bubble {
  font-size: 8.5px; line-height: 1.5; padding: 4px 7px;
  border-radius: 10px; max-width: 90%; word-wrap: break-word;
}
.sw-bubble.from-marco {
  background: var(--product-soft); color: var(--product-deep);
  align-self: flex-start; border-bottom-left-radius: 2px;
  border: 1px solid rgba(99,102,204,0.15);
}
.sw-bubble.from-student {
  background: #fff; color: #1a1a1a; align-self: flex-end;
  border-bottom-right-radius: 2px; border: 1px solid #e8e7e1;
}
.sw-typing {
  display: flex; gap: 3px; align-items: center;
  padding: 4px 7px; align-self: flex-start;
}
.sw-typing span {
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--product-accent); opacity: 0.4;
  animation: swTyping 1.2s ease infinite;
}
.sw-typing span:nth-child(2) { animation-delay: 0.18s; }
.sw-typing span:nth-child(3) { animation-delay: 0.36s; }
@keyframes swTyping {
  0%, 80%, 100% { transform: translateY(0); opacity: 0.4; }
  40% { transform: translateY(-3px); opacity: 1; }
}
.sw-chat-footer {
  padding: 5px 7px; border-top: 1px solid #e0dfd9;
  background: #fff; flex-shrink: 0;
}
.sw-composer {
  background: #f0efeb; border: 1px solid #e0dfd9;
  border-radius: 100px; height: 20px;
  display: flex; align-items: center; padding: 0 6px; gap: 4px;
}
.sw-composer-text { font-size: 8px; color: #9b9b93; flex: 1; }
.sw-composer-send { width: 14px; height: 14px; border-radius: 50%; background: var(--product-deep); flex-shrink: 0; }

/* Teacher dashboard (panel 3) */
.sw-dash { flex: 1; display: flex; flex-direction: column; overflow: hidden; background: #f5f5fc; }
.sw-dash-nav {
  height: 36px; background: rgba(250,250,248,0.96);
  backdrop-filter: blur(8px); border-bottom: 1px solid #e8e7e1;
  display: flex; align-items: center; padding: 0 10px; gap: 7px; flex-shrink: 0;
}
.sw-dash-role { font-size: 8.5px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: #6b6b6b; }
.sw-dash-body { flex: 1; padding: 9px 11px; display: flex; flex-direction: column; gap: 7px; overflow: hidden; }
.sw-dash-greeting {
  font-family: 'Fraunces', Georgia, serif; font-style: italic;
  font-size: 13px; letter-spacing: -0.02em; color: #0a0a0a;
}
.sw-stats-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 5px; }
.sw-stat {
  background: #fff; border: 1px solid #e8e7e1; border-radius: 8px;
  padding: 6px 7px; position: relative; overflow: hidden;
}
.sw-stat.sw-alert { background: rgba(192,57,43,0.05); border-color: rgba(192,57,43,0.2); }
.sw-stat-label {
  font-size: 7px; font-weight: 700; letter-spacing: 0.07em; text-transform: uppercase;
  color: #9b9b93; margin-bottom: 2px;
}
.sw-stat.sw-alert .sw-stat-label { color: #c0392b; }
.sw-stat-value {
  font-family: 'Fraunces', Georgia, serif; font-style: italic;
  font-size: 18px; line-height: 1; letter-spacing: -0.02em; color: #0a0a0a;
}
.sw-stat.sw-alert .sw-stat-value {
  font-family: 'DM Sans', sans-serif; font-style: normal;
  font-size: 9.5px; font-weight: 700; color: #c0392b;
}
.sw-pulse {
  position: absolute; top: 6px; right: 6px;
  width: 7px; height: 7px; border-radius: 50%; background: #c0392b;
}
.sw-pulse::before {
  content: ''; position: absolute; inset: -3px; border-radius: 50%;
  background: #c0392b; opacity: 0.3; animation: swPulse 2s ease infinite;
}
@keyframes swPulse {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 0; transform: scale(1.8); }
}
.sw-feed-card { background: #fff; border: 1px solid #e8e7e1; border-radius: 8px; overflow: hidden; flex: 1; }
.sw-feed-head { padding: 5px 9px; border-bottom: 1px solid #f0efeb; font-size: 9px; font-weight: 700; color: #0a0a0a; }
.sw-feed-item { display: flex; align-items: flex-start; gap: 6px; padding: 7px 9px; }
.sw-feed-item + .sw-feed-item { border-top: 1px solid #f0efeb; }
.sw-feed-item.sw-feed-alert   { background: rgba(192,57,43,0.04); }
.sw-feed-item.sw-feed-success { background: rgba(45,106,79,0.04); }
.sw-feed-icon {
  width: 20px; height: 20px; border-radius: 5px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.sw-feed-item.sw-feed-alert .sw-feed-icon   { background: #c0392b; }
.sw-feed-item.sw-feed-success .sw-feed-icon { background: #2d6a4f; }
.sw-feed-icon svg {
  width: 11px; height: 11px; stroke: #fff; fill: none;
  stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round;
}
.sw-feed-body { flex: 1; min-width: 0; }
.sw-feed-text { font-size: 8.5px; color: #0a0a0a; line-height: 1.4; margin-bottom: 2px; }
.sw-feed-item.sw-feed-alert .sw-feed-text   { color: #9b2525; }
.sw-feed-item.sw-feed-success .sw-feed-text { color: #1a5c3a; }
.sw-feed-time { font-size: 7.5px; color: #9b9b93; }
.sw-feed-btns { display: flex; gap: 4px; margin-top: 4px; }
.sw-feed-btn {
  font-size: 7.5px; font-weight: 700; padding: 2px 5px;
  border-radius: 4px; border: none; cursor: default; letter-spacing: 0.02em;
}
.sw-feed-btn.sw-primary { background: #c0392b; color: #fff; }
.sw-feed-btn.sw-ghost   { background: rgba(192,57,43,0.1); color: #c0392b; }

/* ── Persona segmented control ── */
.showcase-persona-tabs {
  display: inline-flex;
  position: relative;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 100px;
  padding: 4px;
  flex-shrink: 0;
}
.showcase-persona-pill {
  position: absolute;
  top: 4px;
  height: calc(100% - 8px);
  background: rgba(255,255,255,0.11);
  border-radius: 100px;
  border: 1px solid rgba(255,255,255,0.14);
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.06) inset,
    0 0 14px rgba(255,255,255,0.07),
    0 0 6px rgba(255,255,255,0.1);
  transition: left 0.32s cubic-bezier(0.5,0,0.2,1),
              width 0.32s cubic-bezier(0.5,0,0.2,1);
  pointer-events: none;
}
.showcase-persona-btn {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  padding: 0.42rem 1.1rem;
  border-radius: 100px;
  border: none;
  cursor: pointer;
  background: transparent;
  color: rgba(250,250,248,0.32);
  transition: color 0.22s;
  position: relative;
  z-index: 1;
  white-space: nowrap;
}
.showcase-persona-btn.active { color: rgba(250,250,248,0.9); }
.showcase-persona-btn:hover:not(.active) { color: rgba(250,250,248,0.6); }

/* ── Connector: ray of light between window and steps ── */
.sc-connector {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 20px;
  pointer-events: none;
}
.sc-track {
  position: absolute;
  left: 7px;
  top: 18px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(255,255,255,0.1) 12%,
    rgba(255,255,255,0.1) 88%,
    transparent 100%
  );
}
.sc-glow {
  position: absolute;
  left: 2px;    /* center on 1px track at left:7px → 7-4.5=2.5 ≈ 2 */
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: rgba(255,255,255,0.92);
  box-shadow:
    0 0 0 3px rgba(255,255,255,0.15),
    0 0 10px 4px rgba(255,255,255,0.3),
    0 0 22px 8px rgba(255,255,255,0.1);
  transform: translateY(-50%);
  top: 18px; /* GSAP animates this */
  will-change: top;
}

/* ── Steps text ── */
.showcase-steps {
  max-width: 300px;
  display: flex;
  flex-direction: column;
  gap: 2.2rem;
  position: relative;
  padding-left: 28px;
}
.showcase-step {
  will-change: opacity;
  opacity: 0.28;
}
.step-num {
  display: block;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.65rem;
  font-weight: 600;
  color: rgba(250,250,248,0.3);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.45rem;
}
.showcase-step h3 {
  font-family: 'Fraunces', Georgia, serif;
  font-size: clamp(1.35rem, 2vw, 1.65rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 0.55rem;
  color: var(--white);
}
.showcase-step p {
  font-size: 0.88rem;
  color: rgba(250,250,248,0.5);
  line-height: 1.75;
  font-weight: 300;
}

/* Scroll progress bar at bottom */
.showcase-progress {
  position: absolute;
  bottom: 1.75rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.62rem;
  color: rgba(250,250,248,0.25);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.showcase-progress-track {
  width: 80px;
  height: 1px;
  background: rgba(250,250,248,0.12);
  border-radius: 1px;
  overflow: hidden;
}
.showcase-progress-fill {
  height: 100%;
  background: rgba(250,250,248,0.55);
  width: 33%;
  border-radius: 1px;
  transition: width 0.4s cubic-bezier(0.5,0,0.2,1);
}

/* ── Persona glow tab effects ── */
.showcase-persona-btn::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 55%;
  height: 1px;
  background: var(--sc-glow-color);
  border-radius: 1px;
  transition: transform 0.3s cubic-bezier(0.5,0,0.2,1);
  pointer-events: none;
}
.showcase-persona-btn.active::after {
  transform: translateX(-50%) scaleX(1);
}
.showcase-persona-btn.active {
  color: rgba(250,250,248,0.9);
  filter: drop-shadow(0 0 8px rgba(167,139,250,0.45));
}

/* ── Connector: branch tick marks light up per active step ── */
.sc-branch {
  position: absolute;
  left: 3px;
  width: 9px;
  height: 1px;
  background: rgba(255,255,255,0.14);
  border-radius: 1px;
  transition: background 0.35s, box-shadow 0.35s;
}
.sc-branch.active {
  background: var(--sc-glow-color);
  box-shadow: 0 0 7px 2px rgba(167,139,250,0.45);
}

/* ── Persona groups: stacked inside .sw-main ── */
.persona-group {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
}
.persona-group.pg-active {
  opacity: 1;
  pointer-events: auto;
}

/* ── CENTRO: horizontal bar chart ── */
.sw-chart-area {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 6px 0;
}
.sw-chart-row {
  display: flex;
  align-items: center;
  gap: 7px;
}
.sw-chart-label {
  font-size: 8px;
  font-family: 'DM Sans', sans-serif;
  color: rgba(10,10,10,0.5);
  width: 54px;
  flex-shrink: 0;
  text-align: right;
  line-height: 1.2;
}
.sw-chart-track {
  flex: 1;
  height: 9px;
  background: #ededeb;
  border-radius: 99px;
  overflow: hidden;
}
.sw-chart-bar {
  height: 100%;
  border-radius: 99px;
  background: var(--product-accent);
}
.sw-chart-bar.is-highlight {
  background: var(--product-deep);
}
.sw-chart-pct {
  font-size: 7.5px;
  font-family: 'DM Sans', sans-serif;
  color: rgba(10,10,10,0.38);
  width: 22px;
  text-align: right;
}

/* ── PADRE: milestone timeline ── */
.sw-timeline {
  display: flex;
  flex-direction: column;
  padding: 4px 0;
}
.sw-tl-item {
  display: flex;
  gap: 9px;
  padding-bottom: 11px;
  position: relative;
}
.sw-tl-item::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 14px;
  bottom: 0;
  width: 1px;
  background: rgba(10,10,10,0.08);
}
.sw-tl-item:last-child::before { display: none; }
.sw-tl-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1.5px solid rgba(10,10,10,0.15);
  background: #fff;
  flex-shrink: 0;
  margin-top: 3px;
}
.sw-tl-dot.is-active { border-color: var(--product-accent); background: var(--product-soft); }
.sw-tl-dot.is-milestone { border-color: var(--product-deep); background: var(--product-deep); }
.sw-tl-body { flex: 1; min-width: 0; }
.sw-tl-time {
  font-size: 7px;
  font-family: 'DM Sans', sans-serif;
  color: rgba(10,10,10,0.32);
  margin-bottom: 1px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.sw-tl-text {
  font-size: 8.5px;
  font-family: 'DM Sans', sans-serif;
  color: rgba(10,10,10,0.65);
  line-height: 1.4;
}
.sw-tl-milestone {
  display: inline-block;
  margin-top: 3px;
  font-size: 6.5px;
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--product-deep);
  background: var(--product-soft);
  border-radius: 99px;
  padding: 2px 6px;
}

/* ── PROFESOR: student list + AI diagnosis card ── */
.sw-student-list {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 2px 0;
}
.sw-student-row {
  display: flex;
  align-items: center;
  gap: 7px;
}
.sw-student-status {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(10,10,10,0.1);
  flex-shrink: 0;
}
.sw-student-status.is-alert { background: #e05252; box-shadow: 0 0 0 2px rgba(224,82,82,0.2); }
.sw-student-status.is-ok   { background: #4caf78; }
.sw-student-name {
  font-size: 8.5px;
  font-family: 'DM Sans', sans-serif;
  color: rgba(10,10,10,0.7);
  width: 48px;
  flex-shrink: 0;
}
.sw-student-bar-track {
  flex: 1;
  height: 5px;
  background: #ededeb;
  border-radius: 99px;
  overflow: hidden;
}
.sw-student-bar {
  height: 100%;
  border-radius: 99px;
  background: var(--product-accent);
}
.sw-student-bar.is-alert { background: #e05252; }
.sw-student-pct {
  font-size: 7.5px;
  font-family: 'DM Sans', sans-serif;
  color: rgba(10,10,10,0.38);
  width: 22px;
  text-align: right;
}
.sw-analysis-card {
  background: var(--product-soft);
  border: 1px solid rgba(99,102,204,0.18);
  border-radius: 8px;
  padding: 8px 10px;
  margin-top: 6px;
}
.sw-analysis-label {
  font-size: 7px;
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--product-accent);
  margin-bottom: 4px;
}
.sw-analysis-text {
  font-size: 8.5px;
  font-family: 'DM Sans', sans-serif;
  color: rgba(10,10,10,0.65);
  line-height: 1.5;
}

/* ── Mobile ── */
@media (max-width: 900px) {
  .showcase-window { width: 400px; height: 285px; }
  .sw-chat-col { width: 130px; }
}
@media (max-width: 768px) {
  .showcase-section { min-height: auto; padding: 4rem 0; }
  .showcase-sticky { position: relative; height: auto; padding: 2.5rem 1.5rem 3rem; gap: 1.5rem; }
  .showcase-content { flex-direction: column; gap: 2rem; align-items: center; }
  .showcase-persona-tabs { flex-wrap: wrap; justify-content: center; }
  .showcase-window { width: 320px; height: 230px; }
  .sw-chat-col { width: 110px; }
  .sw-chrome { height: 28px; }
  .sw-tlight { width: 9px; height: 9px; }
  .sw-sidebar { width: 38px; }
  .sw-brand-dot { width: 22px; height: 22px; font-size: 10px; }
  .sw-nav-btn { width: 26px; height: 26px; }
  .sw-nav-btn svg { width: 12px; height: 12px; }
  .showcase-steps { max-width: 100%; gap: 1.5rem; padding-left: 0; }
  .sc-connector { display: none; }
  .showcase-step { opacity: 1 !important; }
  .showcase-panel { opacity: 1 !important; }
  .showcase-panel + .showcase-panel { display: none; }
  .showcase-panel[data-panel="0"] { display: flex; opacity: 1 !important; }
  .showcase-progress { display: none; }
}