/* ─────────────────────────────────────────────────────────────
   AlohaDive — Tropical Lagoon Theme
   Vibe: Hawái + Koh Tao. Turquesa profundo, coral, arena.
   ─────────────────────────────────────────────────────────── */

:root {
  /* Paleta */
  --bg-primary:    #02181f;   /* Noche en el reef */
  --bg-secondary:  #042a35;
  --bg-card:       #06384a;
  --bg-card-hover: #0a4a60;
  --accent:        #ffb35a;   /* Coral atardecer */
  --accent-bright: #ffd28a;
  --teal:          #2bd4c4;   /* Lagoon turquesa */
  --teal-bright:   #6ee9dd;
  --sand:          #f5e6c8;
  --text-primary:  #f4fbff;
  --text-secondary:#9fc2cd;
  --text-muted:    #5f8492;
  --border:        #0e3d4d;

  /* Geometría */
  --radius:    10px;
  --radius-lg: 18px;
  --shadow:    0 8px 32px rgba(0,0,0,.45), 0 2px 8px rgba(43,212,196,.08);
  --shadow-lg: 0 16px 48px rgba(0,0,0,.5),  0 4px 16px rgba(255,179,90,.15);

  /* Tipografía */
  --font-display: 'Bebas Neue', 'Big Shoulders Display', sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;
  --font-script:  'Pacifico', cursive;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(43,212,196,.08) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 100%, rgba(255,179,90,.06) 0%, transparent 60%);
  background-attachment: fixed;
}

.wrap { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.accent { color: var(--accent); }
.teal   { color: var(--teal); }

/* ── Header ──────────────────────────────────────────────── */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(2,24,31,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 0;
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; }
.logo {
  font-family: var(--font-script);
  font-size: 1.6rem;
  letter-spacing: 1px;
  color: var(--text-primary);
  text-decoration: none;
  display: inline-flex; align-items: baseline; gap: .35rem;
}
.logo .wave { color: var(--teal); }
.logo .dive { color: var(--accent); }
.nav { display: flex; gap: 1.5rem; align-items: center; }
.nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: color var(--transition);
}
.nav a:hover { color: var(--teal); }
.nav-toggle { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.5rem; cursor: pointer; }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: all var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--accent);
  color: #02181f;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-bright);
  border-color: var(--accent-bright);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,179,90,.35);
}
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border);
}
.btn-outline:hover { border-color: var(--teal); color: var(--teal); }
.btn-lg { padding: 1rem 2.25rem; font-size: 1rem; }
.btn-wa {
  background: #25d366; color: #fff; border-color: #25d366;
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  border-radius: 50px;
}
.btn-wa:hover { background: #1eb851; transform: translateY(-1px); }

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(2,24,31,.55) 0%, rgba(2,24,31,.35) 40%, rgba(2,24,31,.95) 100%),
    url('https://images.unsplash.com/photo-1559825481-12a05cc00344?w=1920&q=80&auto=format') center/cover no-repeat;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 20%, rgba(43,212,196,.12) 0%, transparent 60%);
}
.hero-content { position: relative; z-index: 2; padding: 2rem; }
.hero-eyebrow {
  font-size: 0.85rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 1rem;
  font-weight: 500;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 11vw, 7.5rem);
  letter-spacing: 4px;
  line-height: 1;
  margin-bottom: 1.25rem;
}
.hero h1 .accent { color: var(--accent); }
.hero h1 .teal { color: var(--teal); }
.hero-aloha {
  font-family: var(--font-script);
  font-size: clamp(2rem, 6vw, 3.5rem);
  color: var(--accent);
  display: block;
  margin-bottom: -0.5rem;
  text-shadow: 0 4px 24px rgba(255,179,90,.5);
}
.hero-lead {
  font-size: 1.1rem;
  color: var(--text-primary);
  max-width: 620px;
  margin: 0 auto 2rem;
  line-height: 1.7;
  text-shadow: 0 2px 10px rgba(0,0,0,.6);
}
.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ── Stats ───────────────────────────────────────────────── */
.stats-bar {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 2.5rem 0;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; text-align: center; }
.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--teal);
  letter-spacing: 2px;
}
.stat-label { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }

/* ── Section heads ───────────────────────────────────────── */
.section-head { text-align: center; margin-bottom: 3rem; }
.section-head .eyebrow {
  display: block;
  font-family: var(--font-script);
  color: var(--accent);
  font-size: 1.25rem;
  margin-bottom: .35rem;
}
.section-head h2 {
  font-family: var(--font-display);
  font-size: 2.75rem;
  letter-spacing: 4px;
  margin-bottom: 0.75rem;
}
.section-head p { color: var(--text-secondary); font-size: 1rem; max-width: 640px; margin: 0 auto; }

/* ── Filter Bar ──────────────────────────────────────────── */
.filter-bar {
  display: flex; gap: 0.5rem; justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.filter-btn {
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 50px;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition);
}
.filter-btn:hover, .filter-btn.active {
  background: var(--teal);
  color: #02181f;
  border-color: var(--teal);
}

/* ── Catálogo: tarjetas de cursos ────────────────────────── */
.catalog-section { padding: 5rem 0; }
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.75rem;
}

.course-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
}
.course-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--teal);
}

.course-card__hero {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}
.course-card__hero img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}
.course-card:hover .course-card__hero img { transform: scale(1.05); }

.course-card__badge {
  position: absolute; top: 12px; left: 12px;
  z-index: 2;
  background: var(--accent);
  color: #02181f;
  font-size: .7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: .25rem .6rem;
  border-radius: 4px;
}
.course-card__badge.is-class       { background: var(--teal); color: #02181f; }
.course-card__badge.is-course      { background: var(--accent); color: #02181f; }
.course-card__badge.is-certification {
  background: linear-gradient(135deg, #ffb35a 0%, #ff7e54 100%);
  color: #02181f;
}

.course-card__agency {
  position: absolute; top: 12px; right: 12px;
  z-index: 2;
  background: rgba(2,24,31,.7);
  color: var(--text-primary);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .5px;
  padding: .3rem .55rem;
  border-radius: 6px;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,.08);
}

.course-card__body { padding: 1.25rem; flex: 1; display: flex; flex-direction: column; }
.course-card__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 1.5px;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}
.course-card__subtitle {
  font-family: var(--font-script);
  color: var(--accent);
  font-size: .95rem;
  margin-bottom: .85rem;
}
.course-card__desc {
  color: var(--text-secondary);
  font-size: .9rem;
  margin-bottom: .9rem;
  line-height: 1.5;
}
.course-card__humor {
  font-style: italic;
  color: var(--teal);
  font-size: .82rem;
  margin-bottom: 1rem;
  border-left: 3px solid var(--teal);
  padding-left: .75rem;
  line-height: 1.4;
}

.course-card__meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .5rem .75rem;
  margin: .25rem 0 1rem 0;
  padding: .85rem;
  background: rgba(2,24,31,.4);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.course-card__meta div {
  font-size: .78rem;
  color: var(--text-secondary);
}
.course-card__meta strong {
  display: block;
  color: var(--text-primary);
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .3px;
}

.course-card__price {
  font-family: var(--font-display);
  color: var(--accent);
  font-size: 1.6rem;
  letter-spacing: 1px;
  margin-bottom: .75rem;
}
.course-card__price small {
  font-family: var(--font-body);
  color: var(--text-muted);
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: 1px;
  margin-left: .35rem;
}

/* ── Tarjeta CTA: Escríbenos + WhatsApp ──────────────────── */
.course-card__actions {
  margin-top: auto;
  display: flex;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}
.course-card__actions a {
  flex: 1;
  display: flex; align-items: center; justify-content: center;
  gap: .35rem;
  padding: .75rem .5rem;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .5px;
  text-decoration: none;
  text-transform: uppercase;
  transition: all var(--transition);
}
.course-card__actions .write-us {
  background: var(--bg-secondary);
  color: var(--accent);
  border-right: 1px solid var(--border);
}
.course-card__actions .write-us:hover {
  background: var(--accent);
  color: #02181f;
}
.course-card__actions .wa-action {
  background: #25d366;
  color: #fff;
}
.course-card__actions .wa-action:hover {
  background: #1eb851;
}
.course-card__actions svg { width: 14px; height: 14px; }

/* ── Servicios ───────────────────────────────────────────── */
.services-section {
  padding: 5rem 0;
  background: var(--bg-secondary);
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--transition);
}
.service-card:hover {
  border-color: var(--teal);
  transform: translateY(-2px);
}
.service-icon { font-size: 2rem; margin-bottom: 0.85rem; }
.service-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
}
.service-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* ── About ───────────────────────────────────────────────── */
.about-section { padding: 5rem 0; }
.about-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 3rem; align-items: start; }
.about-text h2 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  letter-spacing: 3px;
  margin-bottom: 1.5rem;
}
.about-text p { color: var(--text-secondary); margin-bottom: 1rem; line-height: 1.7; }
.about-contact { display: flex; gap: 1rem; margin-top: 1.5rem; flex-wrap: wrap; }
.location-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1rem;
}
.location-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 1px;
  color: var(--accent);
  margin-bottom: 0.25rem;
}
.location-card p { color: var(--text-secondary); font-size: 0.9rem; }

/* ── CTA Strip ───────────────────────────────────────────── */
.cta-strip {
  padding: 5rem 0;
  text-align: center;
  background:
    linear-gradient(135deg, rgba(43,212,196,.1) 0%, rgba(255,179,90,.1) 100%),
    var(--bg-secondary);
  border-top: 1px solid var(--border);
}
.cta-strip h2 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  letter-spacing: 3px;
  margin-bottom: 0.75rem;
}
.cta-strip p { color: var(--text-secondary); margin-bottom: 2rem; }

/* ── Footer ──────────────────────────────────────────────── */
.site-footer {
  padding: 2.5rem 0 1.5rem;
  text-align: center;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
}
.site-footer .logo { display: inline-block; margin-bottom: 0.75rem; }
.site-footer p { color: var(--text-muted); font-size: 0.8rem; }
.site-footer .agencies {
  display: flex; justify-content: center; gap: .75rem;
  margin: 1rem 0;
}
.site-footer .agencies span {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: .35rem .75rem;
  border-radius: 4px;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--teal);
}

/* ── WhatsApp FAB ────────────────────────────────────────── */
.wa-fab {
  position: fixed; bottom: 1.5rem; right: 1.5rem;
  width: 60px; height: 60px;
  background: #25d366; color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(37,211,102,0.5);
  transition: all var(--transition);
  z-index: 90;
}
.wa-fab svg { width: 30px; height: 30px; }
.wa-fab:hover { transform: scale(1.1); box-shadow: 0 6px 28px rgba(37,211,102,0.7); }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav {
    display: none; flex-direction: column;
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--bg-primary);
    padding: 1rem; border-bottom: 1px solid var(--border);
  }
  .nav.is-open { display: flex; }
  .nav-toggle { display: block; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .course-grid { grid-template-columns: 1fr; }
}