/* 
   ==========================================================================
   ESTILOS GLOBALES - WEB DE CLASES DE MATEMÁTICAS - TUTORMATE PRO
   Estilo visual: Premium, académico, limpio, responsive, mobile-first
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Outfit:wght@500;600;700;800&display=swap');

/* ─── Variables CSS ─── */
:root {
  --font-title: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Paleta Premium */
  --clr-bg: #f7f8fc;
  --clr-surface: #ffffff;
  --clr-surface-alt: #f1f4f9;

  --clr-primary: #0b1120;
  --clr-primary-light: #1a2744;
  --clr-primary-muted: #4a5568;

  --clr-accent: #0d9488;
  --clr-accent-hover: #0f766e;
  --clr-accent-light: #14b8a6;
  --clr-accent-bg: #f0fdf9;
  --clr-accent-border: #b2f5ea;

  --clr-gold: #c9a84c;
  --clr-gold-light: #f6e8b1;

  --clr-rose-bg: #fff5f5;
  --clr-rose-border: #fed7d7;
  --clr-rose-text: #c53030;

  --clr-border: #e2e8f0;
  --clr-text-main: #1a202c;
  --clr-text-muted: #4a5568;
  --clr-text-light: #718096;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.06), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.1), 0 8px 24px rgba(0,0,0,0.06);
  --shadow-glow: 0 0 30px rgba(13, 148, 136, 0.15);

  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  --transition-fast: all 0.15s ease;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; height: 100%; }

body {
  font-family: var(--font-body);
  background-color: var(--clr-bg);
  color: var(--clr-text-main);
  line-height: 1.65;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ─── Tipografía ─── */
h1, h2, h3, h4 {
  font-family: var(--font-title);
  color: var(--clr-primary);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

p { color: var(--clr-text-muted); }
a { color: inherit; text-decoration: none; transition: var(--transition); }

/* ─── Layout ─── */
.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 1.5rem; }
main { flex-grow: 1; }

.section { padding: 5rem 0; }

.section-alt {
  background: linear-gradient(180deg, var(--clr-surface-alt) 0%, var(--clr-bg) 100%);
  border-top: 1px solid var(--clr-border);
}

/* ─── Botones ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-weight: 600;
  padding: 0.8rem 1.75rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 0.9rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  letter-spacing: 0.01em;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(255,255,255,0.1), transparent);
  pointer-events: none;
}

.btn:active { transform: scale(0.97); }
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-primary-light) 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(11,17,32,0.25);
}
.btn-primary:hover { box-shadow: 0 6px 20px rgba(11,17,32,0.35); }

.btn-secondary {
  background: linear-gradient(135deg, var(--clr-accent) 0%, var(--clr-accent-hover) 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(13,148,136,0.3);
}
.btn-secondary:hover { box-shadow: 0 6px 20px rgba(13,148,136,0.4); }

.btn-outline {
  background-color: var(--clr-surface);
  border: 1.5px solid var(--clr-border);
  color: var(--clr-text-muted);
  box-shadow: var(--shadow-sm);
}
.btn-outline:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  box-shadow: var(--shadow-md);
}

.btn-wsp-outline {
  background: transparent;
  border: 1.5px solid rgba(255,255,255,0.25);
  color: #ffffff;
}
.btn-wsp-outline:hover { background: rgba(255,255,255,0.08); }

.btn svg { margin-right: 0.5rem; }

/* ─── Header & Navbar ─── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.82);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(226,232,240,0.6);
  transition: var(--transition);
}

.navbar {
  display: flex;
  height: 4.25rem;
  align-items: center;
  justify-content: space-between;
}

.brand { display: flex; flex-direction: column; text-decoration: none; }

.brand-name {
  font-family: var(--font-title);
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--clr-primary);
  line-height: 1;
  letter-spacing: -0.02em;
}

.brand-sub {
  font-size: 0.6rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--clr-accent);
  margin-top: 0.2rem;
}

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

.nav-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--clr-text-muted);
  position: relative;
  padding: 0.25rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--clr-accent);
  border-radius: 1px;
  transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after { width: 100%; }
.nav-link:hover { color: var(--clr-primary); }
.nav-link.active { color: var(--clr-primary); font-weight: 600; }

.nav-cta { display: none; }

.hamburger {
  display: block;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--clr-primary);
}
.hamburger svg { width: 1.5rem; height: 1.5rem; }

/* Mobile Menu */
.nav-menu-mobile {
  display: none;
  list-style: none;
  background: var(--clr-surface);
  border-bottom: 1px solid var(--clr-border);
  padding: 1rem 1.5rem 1.5rem;
  box-shadow: var(--shadow-md);
}

.nav-menu-mobile.open {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.nav-menu-mobile .nav-link {
  display: block;
  padding: 0.6rem 0;
  font-size: 1rem;
  border-bottom: 1px solid var(--clr-surface-alt);
}

/* ─── Section Header ─── */
.section-header {
  max-width: 640px;
  margin: 0 auto 3rem auto;
  text-align: center;
}

.section-header.text-left { text-align: left; margin-left: 0; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.85rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--clr-accent);
  background: linear-gradient(135deg, var(--clr-accent-bg) 0%, #e6fffa 100%);
  border: 1px solid var(--clr-accent-border);
  border-radius: var(--radius-full);
  margin-bottom: 1.25rem;
}

.section-title {
  font-size: 2rem;
  color: var(--clr-primary);
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--clr-text-light);
  line-height: 1.6;
}

/* ─── Hero Section ─── */
.hero {
  padding: 5rem 0 4rem;
  background: linear-gradient(170deg, #0b1120 0%, #162038 50%, #1a2744 100%);
  position: relative;
  overflow: hidden;
  text-align: center;
}

/* Decorative floating shapes */
.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -15%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(13,148,136,0.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: floatSlow 12s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(201,168,76,0.08) 0%, transparent 70%);
  border-radius: 50%;
  animation: floatSlow 15s ease-in-out infinite reverse;
}

@keyframes floatSlow {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -30px) scale(1.05); }
}

.hero-content {
  max-width: 720px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.hero .badge {
  background: rgba(13,148,136,0.15);
  border-color: rgba(13,148,136,0.3);
  color: var(--clr-accent-light);
}

.hero-title {
  font-size: 2.5rem;
  line-height: 1.1;
  margin-bottom: 1.25rem;
  color: #ffffff;
  letter-spacing: -0.03em;
}

.hero-title em {
  font-style: normal;
  background: linear-gradient(135deg, var(--clr-accent-light), var(--clr-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.65);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-btns {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.hero-microcopy {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.35);
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* Stat pills in hero */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.hero-stat {
  text-align: center;
}

.hero-stat-number {
  display: block;
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--clr-accent-light);
  letter-spacing: -0.02em;
}

.hero-stat-label {
  font-size: 0.65rem;
  color: rgba(255,255,255,0.4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

/* ─── Grid de Servicios y Tarjetas ─── */
.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 1.5rem;
  right: 1.5rem;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-accent), var(--clr-accent-light));
  border-radius: 0 0 3px 3px;
  opacity: 0;
  transition: var(--transition);
}

.card:hover {
  border-color: rgba(13,148,136,0.3);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  transform: translateY(-3px);
}

.card:hover::before { opacity: 1; }

.card-icon {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--clr-accent-bg), #e6fffa);
  border: 1px solid var(--clr-accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--clr-accent);
  flex-shrink: 0;
}

.card-icon svg { width: 1.25rem; height: 1.25rem; }

.card-title {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.card-desc {
  font-size: 0.85rem;
  color: var(--clr-text-light);
  margin-bottom: 1.25rem;
  flex-grow: 1;
  line-height: 1.6;
}

.card-list {
  list-style: none;
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.card-list-item {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  display: flex;
  align-items: center;
}

.card-list-item::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  background: var(--clr-accent);
  border-radius: 50%;
  margin-right: 0.5rem;
  flex-shrink: 0;
}

.card-link {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--clr-accent);
  display: inline-flex;
  align-items: center;
  margin-top: auto;
}

.card-link svg {
  margin-left: 0.25rem;
  transition: var(--transition);
}
.card-link:hover svg { transform: translateX(3px); }
.card-link:hover { color: var(--clr-accent-hover); }

/* ─── Bloque "¿Cómo sé si es para mí?" (Dark feature) ─── */
.dark-feature {
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-primary-light) 100%);
  border-radius: var(--radius-xl);
  padding: 3.5rem 2rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.dark-feature::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(13,148,136,0.12) 0%, transparent 70%);
  border-radius: 50%;
}

.dark-feature .section-header { position: relative; z-index: 1; }

.dark-feature .badge {
  background: rgba(13,148,136,0.15);
  border-color: rgba(13,148,136,0.3);
  color: var(--clr-accent-light);
}

.dark-feature .section-title { color: #ffffff; }
.dark-feature .section-subtitle { color: rgba(255,255,255,0.55); }

.dark-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: var(--transition);
  position: relative;
  z-index: 1;
}

.dark-card:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(13,148,136,0.3);
  transform: translateY(-2px);
}

.dark-card-icon {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-sm);
  background: rgba(13,148,136,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--clr-accent-light);
}

.dark-card-icon svg { width: 1.1rem; height: 1.1rem; }

.dark-card h3 {
  color: #ffffff;
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.dark-card p {
  color: rgba(255,255,255,0.5);
  font-size: 0.82rem;
  line-height: 1.55;
}

/* ─── Bloque Problema ─── */
.problem-box {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
  max-width: 1000px;
  margin: 0 auto;
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

.problem-intro h3 { font-size: 1.5rem; margin-bottom: 0.75rem; }

.problem-list { display: flex; flex-direction: column; gap: 1.25rem; }

.problem-item { display: flex; align-items: flex-start; }

.problem-num {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-accent-bg), #e6fffa);
  border: 1px solid var(--clr-accent-border);
  color: var(--clr-accent);
  font-weight: 700;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.problem-text {
  margin-left: 1rem;
  font-size: 0.85rem;
  color: var(--clr-text-muted);
  line-height: 1.55;
}
.problem-text strong { color: var(--clr-primary); }

/* ─── Timeline del Método ─── */
.timeline {
  position: relative;
  margin-left: 1rem;
  border-left: 2px solid var(--clr-border);
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.timeline-item {
  position: relative;
  padding-left: 2rem;
  transition: var(--transition);
}

.timeline-dot {
  position: absolute;
  left: -0.55rem;
  top: 0.2rem;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent-hover));
  border: 3px solid var(--clr-bg);
  box-shadow: 0 0 0 2px var(--clr-accent-border);
}

.timeline-header {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  margin-bottom: 0.35rem;
}

.timeline-step {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--clr-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.timeline-title { font-size: 1.1rem; }

.timeline-concept {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  background: var(--clr-surface-alt);
  color: var(--clr-text-light);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.35rem;
}

.timeline-desc {
  font-size: 0.82rem;
  color: var(--clr-text-light);
  line-height: 1.55;
}

.timeline-badge {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--clr-accent-hover);
  background: var(--clr-accent-bg);
  border: 1px solid var(--clr-accent-border);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.45rem;
  display: inline-block;
  margin-top: 0.35rem;
}

/* ─── Planes Comerciales ─── */
.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.plan-card {
  background: var(--clr-surface);
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: var(--transition);
}

.plan-card:hover {
  border-color: var(--clr-primary-muted);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.plan-card.highlighted {
  border-color: var(--clr-accent);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  background: linear-gradient(180deg, #fafffe 0%, #ffffff 100%);
}

.plan-tag {
  position: absolute;
  top: 0;
  right: 1.25rem;
  transform: translateY(-50%);
  background: linear-gradient(135deg, var(--clr-accent) 0%, var(--clr-accent-hover) 100%);
  color: #fff;
  font-size: 0.6rem;
  font-weight: 700;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  box-shadow: 0 2px 8px rgba(13,148,136,0.3);
}

.plan-sub {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--clr-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.25rem;
}

.plan-title { font-size: 1.35rem; margin-bottom: 1rem; }

.plan-format {
  border-top: 1px solid var(--clr-surface-alt);
  border-bottom: 1px solid var(--clr-surface-alt);
  padding: 0.75rem 0;
  margin-bottom: 1.25rem;
}

.plan-format span {
  display: block;
  font-size: 0.6rem;
  color: var(--clr-text-light);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.plan-format p {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--clr-primary);
}

.plan-inclusions-title {
  font-size: 0.6rem;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--clr-text-light);
  margin-bottom: 0.75rem;
  letter-spacing: 0.06em;
}

.plan-list {
  list-style: none;
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.plan-item {
  font-size: 0.82rem;
  color: var(--clr-text-muted);
  display: flex;
  align-items: flex-start;
}

.plan-item svg {
  width: 0.95rem;
  height: 0.95rem;
  color: var(--clr-accent);
  margin-right: 0.5rem;
  margin-top: 0.15rem;
  flex-shrink: 0;
}

.plan-price-info {
  background: var(--clr-surface-alt);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  margin-bottom: 1.25rem;
  text-align: center;
}

.plan-price-label {
  display: block;
  font-size: 0.6rem;
  color: var(--clr-text-light);
  text-transform: uppercase;
  font-weight: 700;
}

.plan-price-desc {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--clr-primary-muted);
  margin-top: 0.1rem;
}

.plan-btns { display: flex; flex-direction: column; gap: 0.5rem; }
.plan-btns .btn { width: 100%; }

/* ─── Bloque Ética ─── */
.ethics-box {
  background: var(--clr-rose-bg);
  border: 1px solid var(--clr-rose-border);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  max-width: 800px;
  margin: 0 auto;
}

.ethics-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.ethics-header svg { width: 1.5rem; height: 1.5rem; color: var(--clr-rose-text); }

.ethics-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  font-size: 0.82rem;
}

.ethics-item { display: flex; align-items: flex-start; }

.ethics-cross {
  color: var(--clr-rose-text);
  font-weight: 800;
  font-size: 1.1rem;
  line-height: 1;
  margin-right: 0.5rem;
  flex-shrink: 0;
}

.ethics-text strong { color: var(--clr-primary); display: inline; }

.ethics-footer {
  border-top: 1px solid rgba(197,48,48,0.1);
  padding-top: 1rem;
  margin-top: 1.5rem;
  text-align: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--clr-rose-text);
  font-style: italic;
}

/* ─── Acordeón FAQ ─── */
.faq-container {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover { border-color: rgba(13,148,136,0.25); }

.faq-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.15rem 1.35rem;
  background: none;
  border: none;
  font-family: var(--font-title);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--clr-primary);
  text-align: left;
  cursor: pointer;
  outline: none;
}

.faq-icon {
  width: 1.15rem;
  height: 1.15rem;
  color: var(--clr-text-light);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-answer {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: all 0.3s ease-in-out;
}

.faq-answer-content {
  padding: 0 1.35rem 1.15rem;
  font-size: 0.85rem;
  color: var(--clr-text-light);
  border-top: 1px solid var(--clr-surface-alt);
  padding-top: 0.85rem;
  line-height: 1.6;
}

.faq-item.open .faq-icon { transform: rotate(180deg); color: var(--clr-accent); }
.faq-item.open .faq-answer { max-height: 25rem; opacity: 1; }
.faq-item.open { border-color: var(--clr-accent-border); box-shadow: var(--shadow-sm); }

/* ─── CTA Final ─── */
.cta-banner {
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-primary-light) 100%);
  color: #fff;
  border-radius: var(--radius-xl);
  padding: 3.5rem 2rem;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -25%;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(13,148,136,0.12) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-banner h2 { color: #fff; font-size: 1.75rem; margin-bottom: 0.75rem; position: relative; }
.cta-banner p { color: rgba(255,255,255,0.6); max-width: 520px; margin: 0 auto 2rem; font-size: 0.9rem; position: relative; }

.cta-banner-btns {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  justify-content: center;
  position: relative;
}

.cta-microcopy {
  font-size: 0.65rem;
  color: rgba(255,255,255,0.3);
  margin-top: 1.5rem;
  font-style: italic;
  position: relative;
}

/* ─── Footer ─── */
.site-footer {
  background: var(--clr-primary);
  color: var(--clr-text-light);
  border-top: 1px solid #1e293b;
  padding: 3.5rem 0 1.5rem;
  font-size: 0.82rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.footer-brand .brand-name { color: #fff; }
.footer-brand p { color: rgba(255,255,255,0.4); margin-top: 0.75rem; font-size: 0.8rem; line-height: 1.5; }

.footer-col-title {
  color: #fff;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
  font-weight: 700;
}

.footer-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-link { color: rgba(255,255,255,0.45); transition: var(--transition); }
.footer-link:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
  text-align: center;
  font-size: 0.7rem;
  color: rgba(255,255,255,0.3);
}

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* ─── Sección Sobre Mí ─── */
.profile-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: start;
}

.profile-sidebar {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.avatar-placeholder {
  width: 8rem;
  height: 8rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-accent-bg), #e6fffa);
  border: 2px solid var(--clr-accent-border);
  color: var(--clr-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-family: var(--font-title);
  font-weight: 800;
  margin-bottom: 1.25rem;
  user-select: none;
  box-shadow: var(--shadow-md);
}

.profile-meta-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.2rem; }
.profile-meta-sub { font-size: 0.75rem; color: var(--clr-accent); font-weight: 600; }

.profile-details { display: flex; flex-direction: column; gap: 1.25rem; }
.profile-details p { font-size: 0.9rem; line-height: 1.7; }

.editable-box {
  background: var(--clr-accent-bg);
  border: 1px solid var(--clr-accent-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.editable-notice {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--clr-accent-hover);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

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

.editable-item { font-size: 0.82rem; }
.editable-item strong { display: block; color: var(--clr-primary); margin-bottom: 0.2rem; }
.editable-item em { font-style: italic; color: var(--clr-text-light); }

/* ─── Contacto y Formulario ─── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.contact-sidebar { display: flex; flex-direction: column; gap: 1.25rem; }

.contact-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.contact-card-title {
  font-size: 1rem;
  border-bottom: 1px solid var(--clr-surface-alt);
  padding-bottom: 0.65rem;
  margin-bottom: 1rem;
}

.contact-info-item { margin-bottom: 1rem; }
.contact-info-item:last-child { margin-bottom: 0; }

.contact-info-label {
  display: block;
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--clr-text-light);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.2rem;
}

.contact-info-value { font-size: 0.82rem; font-weight: 600; }
.contact-info-value a { color: var(--clr-accent); }

.form-box {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-md);
}

.form-group-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

.form-group { margin-bottom: 1rem; }

.form-label {
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.88rem;
  padding: 0.7rem 0.9rem;
  background: var(--clr-bg);
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: var(--transition);
}

.form-control:focus {
  background: #fff;
  border-color: var(--clr-accent);
  box-shadow: 0 0 0 3px rgba(13,148,136,0.08);
}

.form-control.error { border-color: #f87171; box-shadow: 0 0 0 3px rgba(248,113,113,0.1); }
.error-text { font-size: 0.68rem; color: #ef4444; margin-top: 0.2rem; }

.form-checkbox { display: flex; align-items: flex-start; gap: 0.65rem; margin-bottom: 1.25rem; }
.form-checkbox input { margin-top: 0.2rem; cursor: pointer; accent-color: var(--clr-accent); }
.form-checkbox label { font-size: 0.72rem; color: var(--clr-text-light); line-height: 1.4; }
.form-checkbox label a { color: var(--clr-accent); text-decoration: underline; }

.form-success-banner { text-align: center; padding: 2.5rem 1rem; }

.success-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: var(--clr-accent-bg);
  border: 1px solid var(--clr-accent-border);
  color: var(--clr-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
}
.success-icon svg { width: 1.5rem; height: 1.5rem; }

.form-success-banner h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
.form-success-banner p { font-size: 0.82rem; color: var(--clr-text-muted); max-width: 300px; margin: 0 auto 1.25rem; }

/* ─── Modales ─── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(11,17,32,0.6);
  backdrop-filter: blur(6px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-overlay.open { opacity: 1; pointer-events: auto; }

.modal-box {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  width: 100%;
  max-width: 430px;
  box-shadow: var(--shadow-xl);
  transform: translateY(12px) scale(0.98);
  transition: transform 0.25s ease;
}

.modal-overlay.open .modal-box { transform: translateY(0) scale(1); }

.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.modal-title { font-size: 1.1rem; font-weight: 700; color: var(--clr-primary); }

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--clr-text-light);
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}
.modal-close:hover { background: var(--clr-surface-alt); color: var(--clr-primary); }

.modal-body { font-size: 0.82rem; color: var(--clr-text-muted); line-height: 1.6; margin-bottom: 1.25rem; }

.modal-email-copy {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--clr-primary);
  background: var(--clr-surface-alt);
  padding: 0.5rem;
  border-radius: var(--radius-md);
  margin-top: 0.5rem;
  text-align: center;
  user-select: all;
  border: 1px dashed var(--clr-border);
}

.modal-footer { display: flex; gap: 0.65rem; }
.modal-footer .btn { flex-grow: 1; font-size: 0.82rem; padding: 0.55rem 0.85rem; }

/* ─── Diseños Legales ─── */
.legal-box {
  max-width: 780px;
  margin: 2rem auto;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}

.legal-notice-banner {
  background: #fffbeb;
  border-left: 3px solid #f59e0b;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
}

.legal-notice-banner svg { width: 1.15rem; height: 1.15rem; color: #b45309; flex-shrink: 0; margin-top: 0.1rem; }
.legal-notice-text p { font-size: 0.82rem; font-weight: 700; color: #78350f; }
.legal-notice-text span { display: block; font-size: 0.72rem; color: #92400e; margin-top: 0.2rem; line-height: 1.4; }

.legal-title {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--clr-border);
  padding-bottom: 0.75rem;
}

.legal-content {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.legal-content h2 { font-size: 1.15rem; margin-bottom: 0.35rem; }
.legal-content ul { list-style: disc; padding-left: 1.5rem; margin-top: 0.5rem; font-size: 0.82rem; }

/* ─── Smooth scroll-reveal animation ─── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Responsive ─── */
@media (min-width: 640px) {
  .hero-btns { flex-direction: row; }
  .cta-banner-btns { flex-direction: row; }
  .form-group-row { grid-template-columns: 1fr 1fr; }
  .hero-title { font-size: 3rem; }
}

@media (min-width: 768px) {
  .nav-menu { display: flex; }
  .nav-cta { display: block; }
  .hamburger { display: none; }

  .hero { padding: 6rem 0 5rem; }
  .hero-title { font-size: 3.5rem; }

  .section { padding: 5.5rem 0; }
  .section-title { font-size: 2.25rem; }

  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }

  .problem-grid { grid-template-columns: 5fr 7fr; }

  .timeline {
    border-left: none;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
  }

  .timeline-item {
    padding-left: 0;
    border-top: 2px solid var(--clr-border);
    padding-top: 1.25rem;
  }

  .timeline-dot { left: 0; top: -0.5rem; }

  .ethics-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
  .footer-bottom { flex-direction: row; justify-content: space-between; text-align: left; }
  .profile-grid { grid-template-columns: 4fr 8fr; }
  .profile-sidebar { position: sticky; top: 6rem; }
  .contact-grid { grid-template-columns: 4fr 8fr; }
  .editable-grid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}