/* ===== Libreta — landing. Misma identidad que la app: indigo + pasteles. ===== */

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

:root {
  --accent: #4f5bd5;
  --accent-hover: #4049bd;
  --accent-soft: #eceefb;
  --accent-ring: rgba(79, 91, 213, 0.28);
  --text: #1c2230;
  --text-soft: #5a6377;
  --text-faint: #939bac;
  --bg: #e6e4f4;
  --bg-grad: linear-gradient(158deg, #ebe5f8 0%, #f8e8f1 30%, #e3edfa 64%, #e5f4ee 100%);
  --surface: #ffffff;
  --surface-soft: #f5f3fd;
  --border: #e1ddf1;
  --green: #1f9d6b;
  --r-md: 10px;
  --r-lg: 16px;
  --r-pill: 999px;
  --sh-sm: 0 1px 2px rgba(20, 27, 45, 0.06);
  --sh-md: 0 4px 14px rgba(20, 27, 45, 0.08);
  --sh-lg: 0 18px 44px rgba(20, 27, 45, 0.16);
  --font: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg-grad), var(--bg);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { margin: 0; line-height: 1.2; font-weight: 700; }
p { margin: 0; }
a { color: var(--accent); text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

.section-title {
  font-size: clamp(26px, 4vw, 38px);
  text-align: center;
  letter-spacing: -0.02em;
}

/* ===== Botones ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 44px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: transform 0.08s, background 0.15s, box-shadow 0.15s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: linear-gradient(135deg, #6470e6 0%, #4049bd 100%);
  color: #fff;
  box-shadow: 0 6px 18px var(--accent-ring);
}
.btn--primary:hover { background: var(--accent-hover); }
.btn--ghost {
  background: rgba(255, 255, 255, 0.75);
  border-color: var(--border);
  color: var(--text);
}
.btn--ghost:hover { background: #fff; }
.btn--invert {
  background: #fff;
  color: var(--accent);
}
.btn--invert:hover { box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25); }
.btn--lg { height: 52px; padding: 0 28px; font-size: 16px; }
.btn--sm { height: 36px; padding: 0 16px; font-size: 14px; }
.btn--block { width: 100%; }

.pill {
  display: inline-block;
  padding: 6px 14px;
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border);
  color: var(--accent);
  font-size: 13px;
  font-weight: 650;
  margin-bottom: 18px;
}
.pill--invert { background: rgba(255,255,255,0.14); border-color: rgba(255,255,255,0.25); color: #fff; }

/* ===== Nav ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(245, 243, 253, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav__inner { display: flex; align-items: center; gap: 28px; height: 62px; }
.nav__brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 750; font-size: 18px; color: var(--text);
}
.nav__logo {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, #6470e6 0%, #4049bd 100%);
  color: #fff; box-shadow: 0 4px 10px var(--accent-ring);
}
.nav__logo svg { width: 17px; height: 17px; }
.nav__links { display: flex; gap: 22px; margin-left: auto; }
.nav__links a { color: var(--text-soft); font-weight: 550; font-size: 14.5px; }
.nav__links a:hover { color: var(--text); }

/* ===== Hero ===== */
.hero { padding: 72px 0 40px; overflow: hidden; }
.hero__inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(32px, 4.6vw, 50px);
  letter-spacing: -0.025em;
  margin-bottom: 18px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, #4f5bd5, #7a4fd0 60%, #d6356f);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__lede { font-size: 18px; color: var(--text-soft); max-width: 52ch; }
.hero__cta { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.hero__note { margin-top: 14px; font-size: 13.5px; color: var(--text-faint); }

/* Mockup de la app */
.hero__mock { position: relative; }
.mock {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--sh-lg);
  overflow: hidden;
  transform: rotate(1.2deg);
}
.mock__titlebar {
  display: flex; gap: 6px; align-items: center;
  height: 34px; padding: 0 14px;
  background: linear-gradient(180deg, #f0ecfb 0%, #e8e4f6 100%);
  border-bottom: 1px solid var(--border);
}
.mock__titlebar i { width: 10px; height: 10px; border-radius: 50%; background: #d2d7e6; }
.mock__titlebar i:first-child { background: #e8633e; }
.mock__body { display: flex; min-height: 300px; }
.mock__rail {
  width: 26%; padding: 14px 10px;
  background: linear-gradient(180deg, #f0ecfb 0%, #e8e4f6 100%);
  border-right: 1px solid var(--border);
}
.mock__brand {
  height: 26px; border-radius: 8px; margin-bottom: 16px;
  background: linear-gradient(135deg, #6470e6, #4049bd);
  opacity: 0.9;
}
.mock__navitem { height: 14px; border-radius: 6px; background: #dcd7ee; margin: 10px 4px; }
.mock__navitem--on { background: var(--accent-soft); outline: 1.5px solid var(--accent-ring); }
.mock__main { flex: 1; padding: 14px; }
.mock__search { height: 16px; border-radius: 8px; background: #edeaf8; margin-bottom: 14px; }
.mock__h1 { height: 18px; width: 34%; border-radius: 7px; background: #d5d0e8; margin-bottom: 12px; }
.mock__task {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; margin-bottom: 8px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--mc) 12%, #ffffff);
  border: 1px solid color-mix(in srgb, var(--mc) 22%, var(--border));
  border-left: 4px solid var(--mc);
}
.mock__task > div { flex: 1; }
.mock__task b { display: block; height: 11px; width: 78%; border-radius: 5px; background: color-mix(in srgb, var(--mc) 34%, #cfcae6); }
.mock__task u { display: block; height: 8px; margin-top: 6px; border-radius: 4px; background: #e4e0f1; }
.mock__chk { width: 16px; height: 16px; border-radius: 50%; border: 2px solid #cfcae6; flex: none; background: #fff; }
.mock__play {
  width: 0; height: 0; flex: none;
  border-top: 6px solid transparent; border-bottom: 6px solid transparent;
  border-left: 9px solid #b6aed6;
}
.mock__task--run { box-shadow: 0 0 0 1.5px var(--accent); }
.mock__timer {
  font-family: 'Cascadia Code', Consolas, monospace;
  font-size: 12px; font-weight: 700; color: var(--accent);
  background: var(--accent-soft); border-radius: 999px; padding: 3px 9px;
}
.mock__toast {
  position: absolute; right: -14px; bottom: -22px;
  display: flex; gap: 10px; align-items: center;
  background: #fff; border: 1px solid var(--border);
  border-radius: 12px; padding: 12px 16px;
  box-shadow: var(--sh-lg);
  font-size: 13px;
  transform: rotate(-1.4deg);
}
.mock__toast small { color: var(--text-faint); }
.mock__toast-ico {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 50%;
  background: #e4f6ee; color: var(--green); font-weight: 800;
}

/* ===== Pasos ===== */
.steps { padding: 64px 0 24px; }
.steps__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 24px;
  box-shadow: var(--sh-sm);
}
.step__num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent);
  font-weight: 800; margin-bottom: 12px;
}
.step h3 { font-size: 17px; margin-bottom: 8px; }
.step p { color: var(--text-soft); font-size: 14.5px; }

/* ===== Funciones ===== */
.features { padding: 72px 0; }
.features .section-title { margin-bottom: 40px; }
.features__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature {
  background: color-mix(in srgb, var(--fc) 7%, #ffffff);
  border: 1px solid color-mix(in srgb, var(--fc) 18%, var(--border));
  border-top: 4px solid var(--fc);
  border-radius: var(--r-lg);
  padding: 22px;
  box-shadow: var(--sh-sm);
  transition: transform 0.12s, box-shadow 0.15s;
}
.feature:hover { transform: translateY(-3px); box-shadow: var(--sh-md); }
.feature__ico { font-size: 26px; display: block; margin-bottom: 10px; }
.feature h3 { font-size: 16.5px; margin-bottom: 8px; }
.feature p { color: var(--text-soft); font-size: 14.5px; }

/* ===== Asistente ===== */
.assistant {
  background: linear-gradient(135deg, #3d448f 0%, #4f5bd5 55%, #6b4fd0 100%);
  color: #fff;
  padding: 76px 0;
}
.assistant__inner {
  display: grid; grid-template-columns: 1.1fr 0.9fr;
  gap: 48px; align-items: center;
}
.assistant h2 { font-size: clamp(24px, 3.4vw, 34px); letter-spacing: -0.02em; margin-bottom: 16px; }
.assistant p { color: rgba(255, 255, 255, 0.82); font-size: 16.5px; }
.assistant__list { margin-top: 20px; display: grid; gap: 10px; }
.assistant__list li {
  padding-left: 26px; position: relative;
  color: rgba(255, 255, 255, 0.92); font-size: 15px;
}
.assistant__list li::before {
  content: '✓'; position: absolute; left: 0;
  color: #9ef0c9; font-weight: 800;
}
.chat {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 18px;
  padding: 18px;
  backdrop-filter: blur(6px);
  box-shadow: var(--sh-lg);
}
.chat__bubble {
  border-radius: 14px; padding: 12px 15px; font-size: 14.5px; margin-bottom: 10px;
}
.chat__bubble--user {
  background: rgba(255, 255, 255, 0.16); color: #fff;
  width: fit-content; margin-left: auto;
}
.chat__bubble--ai { background: #fff; color: var(--text); }
.chat__bubble--ai strong { display: block; margin-bottom: 8px; }
.chat__bubble--ai small { color: var(--text-faint); display: block; margin-top: 8px; }
.chat__task {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 10px; border-radius: 8px; background: var(--surface-soft);
  margin-bottom: 6px; font-size: 13.5px; font-weight: 550;
}
.chat__task span { width: 9px; height: 9px; border-radius: 50%; background: var(--mc); flex: none; }
.chat__task em { margin-left: auto; font-style: normal; color: var(--text-faint); font-size: 12.5px; }
.chat__actions { display: flex; gap: 8px; }
.chat__actions span {
  font-size: 12.5px; font-weight: 650;
  background: rgba(255, 255, 255, 0.14); border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px; padding: 5px 12px;
}

/* ===== Precios ===== */
.pricing { padding: 76px 0; }
.pricing__sub { text-align: center; color: var(--text-soft); margin: 12px 0 40px; }
.pricing__grid {
  display: grid; grid-template-columns: repeat(2, minmax(0, 320px));
  justify-content: center;
  gap: 22px; align-items: stretch;
}
.price {
  position: relative;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 26px 24px;
  box-shadow: var(--sh-sm);
  display: flex; flex-direction: column;
}
.price--star {
  background: #fff;
  border-color: var(--accent);
  box-shadow: 0 0 0 1.5px var(--accent), var(--sh-lg);
  transform: translateY(-8px);
}
.price__badge {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, #6470e6, #4049bd); color: #fff;
  font-size: 12px; font-weight: 700;
  border-radius: 999px; padding: 4px 14px;
  white-space: nowrap;
}
.price h3 { font-size: 18px; }
.price h3 small { font-size: 12px; color: var(--text-faint); font-weight: 600; margin-left: 6px; }
.price__amount { font-size: 38px; font-weight: 800; letter-spacing: -0.02em; margin: 10px 0 2px; white-space: nowrap; }
.price__amount span { font-size: 14px; font-weight: 600; color: var(--text-faint); margin-left: 4px; }
.price__amount small { font-size: 16px; font-weight: 700; color: var(--text-soft); margin-right: 2px; }
.price__pitch { color: var(--text-soft); font-size: 13.5px; margin-bottom: 16px; }
.price ul { display: grid; gap: 8px; margin-bottom: 22px; flex: 1; }
.price li {
  font-size: 14px; color: var(--text-soft);
  padding-left: 22px; position: relative;
}
.price li::before { content: '✓'; position: absolute; left: 0; color: var(--green); font-weight: 800; }
.pricing__foot { text-align: center; margin-top: 26px; color: var(--text-soft); font-size: 14.5px; }

/* ===== FAQ ===== */
.faq { padding: 24px 0 76px; }
.faq__inner { max-width: 760px; }
.faq .section-title { margin-bottom: 32px; }
.faq details {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 0 20px;
  margin-bottom: 10px;
}
.faq summary {
  cursor: pointer; font-weight: 650; font-size: 15.5px;
  padding: 16px 0; list-style: none; position: relative; padding-right: 30px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: '+'; position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  color: var(--accent); font-size: 20px; font-weight: 700;
}
.faq details[open] summary::after { content: '–'; }
.faq details p { color: var(--text-soft); font-size: 14.5px; padding: 0 0 16px; }

/* ===== CTA final ===== */
.cta {
  background: linear-gradient(135deg, #3d448f 0%, #4f5bd5 60%, #6b4fd0 100%);
  color: #fff;
  padding: 70px 0;
  text-align: center;
}
.cta h2 { font-size: clamp(26px, 3.6vw, 36px); margin-bottom: 10px; }
.cta p { color: rgba(255, 255, 255, 0.85); font-size: 16.5px; }
.cta__buttons { margin-top: 26px; display: flex; justify-content: center; gap: 12px; }
.cta__note { margin-top: 16px; font-size: 13px; color: rgba(255, 255, 255, 0.65); }
.cta__note a { color: #fff; text-decoration: underline; }

/* ===== Footer ===== */
.footer { background: #23284b; color: #b9bdd8; padding: 44px 0 24px; }
.footer__inner {
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px;
  padding-bottom: 28px; border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}
.footer__brand strong { color: #fff; font-size: 18px; }
.footer__brand p { font-size: 13.5px; margin-top: 8px; }
.footer__col { display: grid; gap: 8px; align-content: start; }
.footer__col h4 { color: #fff; font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; }
.footer__col a { color: #b9bdd8; font-size: 14px; }
.footer__col a:hover { color: #fff; }
.footer__legal { padding-top: 18px; font-size: 12.5px; color: #8a8fb0; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero__inner, .assistant__inner { grid-template-columns: 1fr; gap: 36px; }
  .hero { padding-top: 48px; }
  .hero__mock { max-width: 520px; }
  .steps__grid, .features__grid, .pricing__grid { grid-template-columns: 1fr; }
  .price--star { transform: none; }
  .nav__links { display: none; }
  .footer__inner { grid-template-columns: 1fr; }
  .mock__toast { right: 4px; }
}