/* Landing page — Taquilla Academia Serfa */

:root,
html[data-theme="dark"] {
  --landing-bg: #0b1220;
  --landing-surface: #111827;
  --landing-card: #1f2937;
  --landing-border: rgba(255, 255, 255, 0.08);
  --landing-text: #f8fafc;
  --landing-muted: #94a3b8;
  --landing-accent: #14b8a6;
  --landing-accent-dark: #0d9488;
  --landing-accent-soft: rgba(20, 184, 166, 0.12);
  --landing-accent-text: #99f6e4;
  --landing-header-bg: rgba(11, 18, 32, 0.82);
  --landing-header-mobile-bg: rgba(11, 18, 32, 0.96);
  --landing-nav-hover: rgba(255, 255, 255, 0.06);
  --landing-btn-secondary-bg: rgba(255, 255, 255, 0.04);
  --landing-panel-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  --landing-step-bg: rgba(255, 255, 255, 0.02);
  --landing-hero-glow: radial-gradient(circle at top right, rgba(20, 184, 166, 0.18), transparent 30%),
    radial-gradient(circle at 20% 20%, rgba(37, 99, 235, 0.16), transparent 28%);
  --landing-btn-primary-text: #042f2e;
  --landing-btn-primary-bg: linear-gradient(135deg, #5eead4, var(--landing-accent));
  --landing-stat-strong: #fff;
  --landing-radius: 16px;
  --landing-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --landing-max: 1140px;
}

html[data-theme="light"] {
  --landing-bg: #f4f7fb;
  --landing-surface: #ffffff;
  --landing-card: #ffffff;
  --landing-border: rgba(15, 23, 42, 0.1);
  --landing-text: #0f172a;
  --landing-muted: #64748b;
  --landing-accent: #0d9488;
  --landing-accent-dark: #0f766e;
  --landing-accent-soft: rgba(13, 148, 136, 0.12);
  --landing-accent-text: #0f766e;
  --landing-header-bg: rgba(244, 247, 251, 0.88);
  --landing-header-mobile-bg: rgba(255, 255, 255, 0.98);
  --landing-nav-hover: rgba(15, 23, 42, 0.05);
  --landing-btn-secondary-bg: #ffffff;
  --landing-panel-bg: linear-gradient(180deg, #ffffff, #f8fafc);
  --landing-step-bg: #f8fafc;
  --landing-hero-glow: radial-gradient(circle at top right, rgba(13, 148, 136, 0.12), transparent 32%),
    radial-gradient(circle at 20% 20%, rgba(37, 99, 235, 0.08), transparent 28%);
  --landing-btn-primary-text: #ffffff;
  --landing-btn-primary-bg: linear-gradient(135deg, #14b8a6, #0d9488);
  --landing-stat-strong: #0f172a;
  --landing-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
}

html {
  color-scheme: light dark;
}

html[data-theme="dark"] {
  color-scheme: dark;
}

html[data-theme="light"] {
  color-scheme: light;
}

.landing-page {
  margin: 0;
  color: var(--landing-text);
  background: var(--landing-bg);
  font-family: "Montserrat", "Helvetica Neue", Helvetica, Arial, sans-serif;
  line-height: 1.6;
  text-shadow: none;
  transition: background 0.25s ease, color 0.25s ease;
}

.landing-page a {
  color: inherit;
  text-decoration: none;
}

.landing-page img {
  max-width: 100%;
  height: auto;
}

.landing-container {
  width: min(100% - 2rem, var(--landing-max));
  margin: 0 auto;
}


.landing-header__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.landing-theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--landing-border);
  border-radius: 999px;
  background: var(--landing-btn-secondary-bg);
  color: var(--landing-text);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.landing-theme-toggle:hover,
.landing-theme-toggle:focus {
  background: var(--landing-nav-hover);
  outline: none;
}

.landing-theme-toggle .fa-sun-o {
  display: none;
}

html[data-theme="light"] .landing-theme-toggle .fa-moon-o {
  display: none;
}

html[data-theme="light"] .landing-theme-toggle .fa-sun-o {
  display: inline-block;
}

/* Header */
.landing-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: var(--landing-header-bg);
  border-bottom: 1px solid var(--landing-border);
}

.landing-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
  position: relative;
}

.landing-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.landing-brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  line-height: 0;
}

.landing-brand__mark svg {
  display: block;
  width: 100%;
  height: 100%;
}

.landing-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.landing-brand__text small {
  color: var(--landing-muted);
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.landing-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.landing-nav a {
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  color: var(--landing-muted);
  font-size: 0.92rem;
  font-weight: 600;
  transition: color 0.2s ease, background 0.2s ease;
}

.landing-nav a:hover,
.landing-nav a:focus {
  color: var(--landing-text);
  background: var(--landing-nav-hover);
}

.landing-nav__cta {
  color: #fff !important;
  background: var(--landing-accent-dark) !important;
}

.landing-nav__cta:hover,
.landing-nav__cta:focus {
  background: var(--landing-accent) !important;
}

.landing-menu-toggle {
  display: none;
  border: 1px solid var(--landing-border);
  background: transparent;
  color: var(--landing-text);
  width: 44px;
  height: 44px;
  border-radius: 12px;
  font-size: 1.2rem;
}

/* Hero */
.landing-hero {
  position: relative;
  overflow: hidden;
  padding: 5rem 0 4rem;
}

.landing-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--landing-hero-glow);
  pointer-events: none;
}

.landing-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.landing-eyebrow {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: var(--landing-accent-soft);
  color: var(--landing-accent-text);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.landing-hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.08;
  font-weight: 800;
}

.landing-hero__lead {
  max-width: 38rem;
  margin: 0 0 1.75rem;
  color: var(--landing-muted);
  font-size: 1.08rem;
}

.landing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.landing-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.landing-btn:hover,
.landing-btn:focus {
  transform: translateY(-1px);
  text-decoration: none;
}

.landing-btn--primary {
  color: #042f2e;
  background: linear-gradient(135deg, #5eead4, var(--landing-accent));
  box-shadow: 0 12px 30px rgba(20, 184, 166, 0.25);
}

.landing-btn--secondary {
  color: var(--landing-text);
  border: 1px solid var(--landing-border);
  background: rgba(255, 255, 255, 0.04);
}

.landing-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  color: var(--landing-muted);
  font-size: 0.92rem;
}

.landing-trust span {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.landing-trust i {
  color: var(--landing-accent);
}

.landing-hero__panel {
  padding: 1.5rem;
  border: 1px solid var(--landing-border);
  border-radius: calc(var(--landing-radius) + 4px);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  box-shadow: var(--landing-shadow);
}

.landing-hero__panel h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
}

.landing-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
}

.landing-checklist li {
  display: flex;
  gap: 0.75rem;
  padding: 0.8rem 0;
  border-top: 1px solid var(--landing-border);
  color: var(--landing-muted);
}

.landing-checklist li:first-child {
  border-top: 0;
  padding-top: 0;
}

.landing-checklist i {
  color: var(--landing-accent);
  margin-top: 0.15rem;
}

/* Stats */
.landing-stats {
  padding: 0 0 4rem;
}

.landing-stats__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.landing-stat {
  padding: 1.35rem 1.5rem;
  border: 1px solid var(--landing-border);
  border-radius: var(--landing-radius);
  background: var(--landing-surface);
}

.landing-stat strong {
  display: block;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.1;
  color: #fff;
}

.landing-stat span {
  color: var(--landing-muted);
  font-size: 0.92rem;
}

/* Sections */
.landing-section {
  padding: 4rem 0;
}

.landing-section--alt {
  background: var(--landing-surface);
  border-block: 1px solid var(--landing-border);
}

.landing-section__head {
  max-width: 42rem;
  margin-bottom: 2rem;
}

.landing-section__head h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
}

.landing-section__head p {
  margin: 0;
  color: var(--landing-muted);
}

.landing-studies {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.landing-study-card {
  display: flex;
  flex-direction: column;
  min-height: 220px;
  padding: 1.25rem;
  border: 1px solid var(--landing-border);
  border-radius: var(--landing-radius);
  background: var(--landing-card);
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.landing-study-card:hover,
.landing-study-card:focus {
  transform: translateY(-3px);
  border-color: rgba(20, 184, 166, 0.45);
  box-shadow: var(--landing-shadow);
  text-decoration: none;
}

.landing-study-card__media {
  height: 110px;
  margin: -1.25rem -1.25rem 1rem;
  background:
    linear-gradient(135deg, rgba(20, 184, 166, 0.35), rgba(37, 99, 235, 0.35)),
    center / cover no-repeat;
}

.landing-study-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  line-height: 1.35;
}

.landing-study-card p {
  margin: auto 0 0;
  color: var(--landing-muted);
  font-size: 0.9rem;
}

.landing-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.landing-step {
  padding: 1.5rem;
  border: 1px solid var(--landing-border);
  border-radius: var(--landing-radius);
  background: rgba(255, 255, 255, 0.02);
}

.landing-step__num {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin-bottom: 1rem;
  border-radius: 10px;
  background: var(--landing-accent-soft);
  color: #99f6e4;
  font-weight: 800;
}

.landing-step h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.landing-step p {
  margin: 0;
  color: var(--landing-muted);
  font-size: 0.95rem;
}

.landing-cta {
  padding: 4rem 0 5rem;
}

.landing-cta__box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 2rem;
  border: 1px solid rgba(20, 184, 166, 0.25);
  border-radius: calc(var(--landing-radius) + 4px);
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.16), rgba(37, 99, 235, 0.12));
}

.landing-cta__box h2 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.4rem, 3vw, 2rem);
}

.landing-cta__box p {
  margin: 0;
  color: var(--landing-muted);
}

.landing-footer {
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--landing-border);
  color: var(--landing-muted);
  font-size: 0.9rem;
}

.landing-footer__grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.landing-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.landing-footer nav a:hover,
.landing-footer nav a:focus {
  color: var(--landing-text);
}

/* Responsive */
@media (max-width: 991px) {
  .landing-hero__grid,
  .landing-studies,
  .landing-steps,
  .landing-stats__grid {
    grid-template-columns: 1fr 1fr;
  }

  .landing-hero__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767px) {
  .landing-menu-toggle {
    display: inline-grid;
    place-items: center;
  }

  .landing-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    background: var(--landing-header-mobile-bg);
    border-bottom: 1px solid var(--landing-border);
  }

  .landing-nav.is-open {
    display: flex;
  }

  .landing-nav a {
    border-radius: 12px;
  }

  .landing-header__inner {
    position: relative;
  }

  .landing-studies,
  .landing-steps,
  .landing-stats__grid {
    grid-template-columns: 1fr;
  }

  .landing-cta__box {
    flex-direction: column;
    align-items: flex-start;
  }

  .landing-hero {
    padding-top: 3.5rem;
  }
}