/* ==========================================================================
   Centro Internacional de Idiomas — sistema de diseño
   Paleta: tinta navy + dorado (sello/certificación) + papel cálido
   Tipografía: Fraunces (display) + Inter (texto/UI)
   ========================================================================== */

:root {
  --ink: #2f322b;
  --ink-soft: #565b4d;
  --ink-2: #3c4035;
  --paper: #f2f6ea;
  --paper-2: #e9efdd;
  --gold: #5c8a3a;
  --gold-light: #a8d574;
  --teal: #6c8b8b;
  --text: #2f322b;
  --text-muted: #6b6f64;
  --on-ink: #f7faf1;
  --on-ink-muted: #c4cebb;
  --rule: rgba(47, 50, 43, 0.14);
  --rule-on-ink: rgba(247, 250, 241, 0.18);

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --maxw: 1120px;
  --radius: 3px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--paper);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em;
  color: var(--ink);
}

p { margin: 0 0 1em; max-width: 62ch; }
.on-ink p { color: var(--on-ink-muted); }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 88px 0; }
.section-tight { padding: 56px 0; }

@media (max-width: 720px) {
  .section { padding: 56px 0; }
  .section-tight { padding: 40px 0; }
}

.bg-ink { background: var(--ink); color: var(--on-ink); }
.bg-ink h1, .bg-ink h2, .bg-ink h3, .bg-ink h4 { color: var(--on-ink); }
.bg-paper2 { background: var(--paper-2); }

/* Focus visibility */
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* -------------------------------------------------- buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 13px 26px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-gold { background: var(--gold); color: var(--ink); }
.btn-gold:hover { background: var(--gold-light); }
.btn-outline-ink { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-outline-ink:hover { background: var(--ink); color: var(--on-ink); }
.btn-outline-paper { border-color: var(--on-ink-muted); color: var(--on-ink); background: transparent; }
.btn-outline-paper:hover { border-color: var(--on-ink); background: rgba(246,243,236,0.08); }
.btn-whatsapp { background: var(--teal); color: var(--on-ink); }
.btn-whatsapp:hover { background: #275a4f; }
.btn-block { width: 100%; justify-content: center; }

/* -------------------------------------------------- header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--ink);
  border-bottom: 1px solid var(--rule-on-ink);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { height: 34px; width: auto; }
.brand-text { font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; letter-spacing: 0.01em; }

.nav-desktop { display: flex; align-items: center; gap: 32px; }
.nav-desktop a {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--on-ink-muted);
  position: relative;
  padding: 4px 0;
}
.nav-desktop a:hover { color: var(--on-ink); }
.nav-desktop a.active { color: var(--on-ink); }
.nav-desktop a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 2px;
  background: var(--gold-light);
}

.has-dropdown { position: relative; }
.dropdown {
  position: absolute;
  top: 100%;
  left: -16px;
  margin-top: 14px;
  background: var(--ink-2);
  padding: 10px;
  min-width: 190px;
  border-radius: var(--radius);
  box-shadow: 0 12px 28px rgba(0,0,0,0.28);
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
}
.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a { display: block; padding: 9px 12px; color: var(--on-ink-muted); font-size: 0.92rem; border-radius: 2px; }
.dropdown a:hover { background: rgba(246,243,236,0.08); color: var(--on-ink); }

.header-cta { display: flex; align-items: center; gap: 18px; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span, .nav-toggle::before, .nav-toggle::after {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  background: var(--on-ink);
  margin: 5px 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

@media (max-width: 900px) {
  .nav-desktop { display: none; }
  .header-cta .btn-gold { display: none; }
  .nav-toggle { display: block; }
}

.mobile-nav {
  display: none;
  background: var(--ink);
  padding: 8px 24px 24px;
}
.mobile-nav.open { display: block; }
.mobile-nav a {
  display: block;
  padding: 12px 0;
  color: var(--on-ink);
  border-bottom: 1px solid var(--rule-on-ink);
  font-size: 1rem;
}
.mobile-nav .sub { padding-left: 16px; }
.mobile-nav .sub a { color: var(--on-ink-muted); font-size: 0.94rem; border-bottom: none; padding: 8px 0; }

/* -------------------------------------------------- hero */
.hero {
  padding: 76px 0 0;
  overflow: hidden;
}
.hero-inner { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; padding-bottom: 64px; }
.hero-eyebrow { color: var(--gold-light); font-family: var(--font-body); font-weight: 600; font-size: 0.85rem; margin-bottom: 18px; }
.hero h1 { font-size: clamp(2.2rem, 4.4vw, 3.4rem); letter-spacing: -0.01em; margin-bottom: 22px; }
.hero h1 em { font-style: italic; color: var(--gold-light); }
.hero-sub { font-size: 1.08rem; color: var(--on-ink-muted); max-width: 46ch; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 44px; }

.greeting-strip { border-top: 1px solid var(--rule-on-ink); padding-top: 22px; }
.greeting-strip-label { font-size: 0.8rem; color: var(--on-ink-muted); margin-bottom: 14px; }
.greetings { display: flex; flex-wrap: wrap; gap: 10px 28px; list-style: none; padding: 0; margin: 0; }
.greetings a { display: flex; align-items: baseline; gap: 8px; font-family: var(--font-display); font-size: 1.15rem; color: var(--on-ink); border-bottom: 1px solid transparent; }
.greetings a:hover { border-bottom-color: var(--gold); color: var(--gold-light); }
.greetings small { font-family: var(--font-body); font-size: 0.75rem; color: var(--on-ink-muted); font-weight: 500; }

.hero-figure { position: relative; }
.hero-stack { display: flex; flex-direction: column; gap: 0; border-left: 1px solid var(--rule-on-ink); padding-left: 36px; }
.hero-stat { padding: 18px 0; border-bottom: 1px solid var(--rule-on-ink); }
.hero-stat:last-child { border-bottom: none; }
.hero-stat .num { font-family: var(--font-display); font-size: 2.1rem; color: var(--gold-light); display: block; }
.hero-stat .label { font-size: 0.92rem; color: var(--on-ink-muted); }

@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; padding-bottom: 40px; }
  .hero-stack { border-left: none; padding-left: 0; border-top: 1px solid var(--rule-on-ink); padding-top: 20px; flex-direction: row; flex-wrap: wrap; gap: 24px; }
  .hero-stat { border-bottom: none; padding: 0; flex: 1 1 40%; }
}

/* -------------------------------------------------- quienes somos */
.about-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 64px; align-items: center; }
.about-grid img { border-radius: var(--radius); }
.eyebrow { font-size: 0.85rem; font-weight: 600; color: var(--gold); margin-bottom: 12px; }
.about-copy h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); max-width: 16ch; }
.progress-list { list-style: none; padding: 0; margin: 32px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 20px 32px; }
.progress-item .top-row { display: flex; justify-content: space-between; font-size: 0.9rem; margin-bottom: 6px; }
.progress-item .top-row strong { font-weight: 500; color: var(--text); }
.progress-item .bar { height: 3px; background: var(--rule); }
.progress-item .bar span { display: block; height: 100%; background: var(--teal); width: 100%; }

@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .progress-list { grid-template-columns: 1fr; }
}

/* -------------------------------------------------- benefits */
.benefits-head { max-width: 46ch; margin-bottom: 40px; }
.benefits-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 48px; }
.benefits-cols ol { list-style: none; counter-reset: b; padding: 0; margin: 0; }
.benefits-cols li { counter-increment: b; display: flex; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--rule); }
.benefits-cols li::before {
  content: counter(b, decimal-leading-zero);
  font-family: var(--font-display);
  color: var(--gold);
  font-size: 0.95rem;
  flex-shrink: 0;
  width: 28px;
}
@media (max-width: 720px) { .benefits-cols { grid-template-columns: 1fr; } }

/* -------------------------------------------------- courses grid */
.courses-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 36px; flex-wrap: wrap; }
.courses-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3px; background: var(--ink); }
.course-tile {
  position: relative;
  aspect-ratio: 4/5;
  overflow: hidden;
  display: block;
}
.course-tile img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease, filter 0.4s ease; filter: grayscale(15%); }
.course-tile:hover img { transform: scale(1.045); filter: grayscale(0%); }
.course-tile .overlay {
  position: absolute; inset: 0;
  background: linear-gradient(0deg, rgba(22,33,62,0.86) 0%, rgba(22,33,62,0.05) 55%);
}
.course-tile .tile-label {
  position: absolute; left: 20px; bottom: 18px; right: 20px;
  color: var(--on-ink);
}
.course-tile .tile-label .lang-native { font-family: var(--font-display); font-style: italic; font-size: 1.5rem; display: block; }
.course-tile .tile-label .lang-es { font-size: 0.82rem; color: var(--on-ink-muted); text-transform: none; }

@media (max-width: 720px) { .courses-grid { grid-template-columns: repeat(2, 1fr); } }

/* -------------------------------------------------- why us */
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.why-item { border-top: 2px solid var(--gold); padding-top: 20px; }
.why-item h3 { font-size: 1.15rem; }
@media (max-width: 760px) { .why-grid { grid-template-columns: 1fr; gap: 28px; } }

.purpose-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 56px; padding-top: 56px; border-top: 1px solid var(--rule-on-ink); }
@media (max-width: 760px) { .purpose-grid { grid-template-columns: 1fr; } }

/* -------------------------------------------------- steps (timeline) */
.steps-list { list-style: none; padding: 0; margin: 48px 0 0; counter-reset: s; }
.step-item { display: grid; grid-template-columns: 64px 1fr; gap: 24px; position: relative; padding-bottom: 44px; }
.step-item:last-child { padding-bottom: 0; }
.step-item::before {
  counter-increment: s;
  content: counter(s, decimal-leading-zero);
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--gold);
}
.step-item::after {
  content: "";
  position: absolute;
  left: 26px; top: 40px; bottom: -4px;
  width: 1px;
  background: var(--rule);
}
.step-item:last-child::after { display: none; }
.step-item h3 { font-size: 1.1rem; margin-bottom: 6px; }
.step-item p { font-size: 0.95rem; color: var(--text-muted); }

/* -------------------------------------------------- testimonials */
.testimonial-list { display: grid; grid-template-columns: 1fr 1fr; gap: 48px 56px; margin-top: 40px; }
.testimonial { border-left: 2px solid var(--gold); padding-left: 22px; }
.testimonial p.quote { font-family: var(--font-display); font-style: italic; font-size: 1.15rem; color: var(--text); margin-bottom: 14px; }
.testimonial .who { font-size: 0.88rem; color: var(--text-muted); }
@media (max-width: 760px) { .testimonial-list { grid-template-columns: 1fr; } }

/* -------------------------------------------------- footer */
.site-footer { background: var(--ink); color: var(--on-ink-muted); padding-top: 72px; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 0.8fr 1fr; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid var(--rule-on-ink); }
.footer-brand img { height: 30px; margin-bottom: 16px; }
.footer-brand p { font-size: 0.92rem; max-width: 34ch; }
.footer-social { display: flex; gap: 14px; margin-top: 18px; }
.footer-social a { width: 34px; height: 34px; border: 1px solid var(--rule-on-ink); border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.footer-social a:hover { border-color: var(--gold); color: var(--gold-light); }
.footer-col h4 { color: var(--on-ink); font-size: 0.85rem; font-family: var(--font-body); font-weight: 600; margin-bottom: 16px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 10px; font-size: 0.92rem; }
.footer-col a:hover { color: var(--on-ink); }
.footer-bottom { display: flex; justify-content: space-between; padding: 22px 0; font-size: 0.82rem; flex-wrap: wrap; gap: 10px; }
.footer-bottom a:hover { color: var(--on-ink); }

@media (max-width: 800px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}

/* -------------------------------------------------- WhatsApp floating button */
.wa-float {
  position: fixed;
  right: 20px; bottom: 20px;
  z-index: 60;
  background: var(--teal);
  color: #fff;
  width: 56px; height: 56px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 22px rgba(0,0,0,0.25);
  transition: transform 0.15s ease;
}
.wa-float:hover { transform: scale(1.06); }

/* -------------------------------------------------- inner page hero */
.page-hero { padding: 56px 0 48px; }
.breadcrumb { font-size: 0.85rem; color: var(--on-ink-muted); margin-bottom: 18px; }
.breadcrumb a:hover { color: var(--on-ink); }
.page-hero h1 { font-size: clamp(2rem, 4vw, 2.8rem); }
.page-hero .lead { color: var(--on-ink-muted); max-width: 56ch; font-size: 1.05rem; }

/* -------------------------------------------------- course page */
.level-nav {
  position: sticky;
  top: 76px;
  z-index: 30;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  padding: 16px 0;
}
.level-nav .container { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.level-nav-label { font-size: 0.8rem; color: var(--text-muted); margin-right: 4px; }
.level-pill {
  font-size: 0.86rem;
  font-weight: 600;
  padding: 7px 16px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--ink-soft);
}
.level-pill:hover { border-color: var(--gold); color: var(--ink); }

.level-block { padding: 64px 0; border-bottom: 1px solid var(--rule); }
.level-block:last-of-type { border-bottom: none; }
.level-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 32px; flex-wrap: wrap; margin-bottom: 8px; }
.level-head h2 { font-size: 1.8rem; }
.level-tagline { color: var(--text-muted); max-width: 60ch; margin-bottom: 32px; }

.level-layout { display: grid; grid-template-columns: 1fr 320px; gap: 48px; align-items: start; }
@media (max-width: 900px) { .level-layout { grid-template-columns: 1fr; } }

.teacher-row { display: flex; gap: 18px; margin-bottom: 36px; flex-wrap: wrap; }
.teacher-chip { display: flex; align-items: center; gap: 10px; }
.teacher-chip img { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; }
.teacher-chip .tname { font-size: 0.9rem; font-weight: 600; display: block; }
.teacher-chip .trole { font-size: 0.78rem; color: var(--text-muted); }

/* accordion (native details/summary, styled) */
.acc { border: 1px solid var(--rule); border-radius: var(--radius); margin-bottom: 12px; background: #fff; }
.acc summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 22px;
  font-weight: 600;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.acc summary::-webkit-details-marker { display: none; }
.acc summary::after {
  content: "+";
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1.3rem;
  color: var(--gold);
  transition: transform 0.15s ease;
}
.acc[open] summary::after { content: "–"; }
.acc .acc-body { padding: 0 22px 22px; }
.acc .acc-body h4 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--gold); font-family: var(--font-body); font-weight: 600; margin: 18px 0 8px; }
.acc .acc-body h4:first-child { margin-top: 0; }
.acc ul { margin: 0 0 6px; padding-left: 20px; }
.acc ul ul { margin-top: 4px; }
.acc li { margin-bottom: 5px; font-size: 0.95rem; }
.acc p { font-size: 0.95rem; margin-bottom: 8px; }
.info-list { list-style: none; padding: 0; margin: 0; }
.info-list > li { padding: 10px 0; border-bottom: 1px solid var(--rule); font-size: 0.94rem; }
.info-list > li:last-child { border-bottom: none; }
.info-list b { display: block; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-muted); font-weight: 600; margin-bottom: 3px; }
.info-list ul { margin: 6px 0 0; padding-left: 18px; }
.info-list ul li { font-size: 0.9rem; margin-bottom: 3px; }

.outcome-list { list-style: none; padding: 0; margin: 0; }
.outcome-list li { position: relative; padding: 8px 0 8px 26px; font-size: 0.95rem; border-bottom: 1px solid var(--rule); }
.outcome-list li:last-child { border-bottom: none; }
.outcome-list li::before { content: "✓"; position: absolute; left: 0; color: var(--teal); font-weight: 700; }

/* pricing card */
.price-card {
  background: var(--ink);
  color: var(--on-ink);
  padding: 28px;
  border-radius: var(--radius);
  position: sticky;
  top: 150px;
}
.price-card .tag {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink);
  background: var(--gold);
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.price-card .price-row { display: flex; justify-content: space-between; padding: 12px 0; border-bottom: 1px solid var(--rule-on-ink); font-size: 0.9rem; }
.price-card .price-row:last-of-type { border-bottom: none; }
.price-card .price-row .amount { font-family: var(--font-display); font-size: 1.15rem; color: var(--gold-light); }
.price-card .price-note { font-size: 0.78rem; color: var(--on-ink-muted); margin: 4px 0 0; }
.price-card .btn { margin-top: 20px; }
.price-card .fineprint { font-size: 0.76rem; color: var(--on-ink-muted); margin-top: 14px; }
.price-card ul { list-style: none; padding: 0; margin: 0 0 16px; }
.price-card li { padding: 8px 0; border-bottom: 1px solid var(--rule-on-ink); font-size: 0.88rem; }
.price-card li:last-child { border-bottom: none; }
.price-card b { color: var(--gold-light); font-weight: 600; }
.price-card i { color: var(--on-ink-muted); font-style: italic; }
.price-card h4 { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.04em; font-family: var(--font-body); font-weight: 700; color: var(--on-ink-muted) !important; }

@media (max-width: 900px) {
  .price-card { position: static; }
}

.cert-note {
  margin-top: 28px;
  padding: 18px 20px;
  border: 1px dashed var(--gold);
  border-radius: var(--radius);
  font-size: 0.92rem;
  background: rgba(184,137,61,0.06);
}
.cert-note strong { color: var(--ink); }

/* simple page (contacto, docentes) */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
@media (max-width: 800px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-list { list-style: none; padding: 0; margin: 0; }
.contact-list li { padding: 18px 0; border-bottom: 1px solid var(--rule); }
.contact-list b { display: block; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--gold); font-weight: 600; margin-bottom: 4px; }

.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px 24px; margin-top: 48px; }
.team-card img { width: 100%; aspect-ratio: 3/4; object-fit: cover; border-radius: var(--radius); margin-bottom: 14px; filter: grayscale(20%); }
.team-card .tname { font-family: var(--font-display); font-size: 1.05rem; margin-bottom: 2px; }
.team-card .trole { font-size: 0.85rem; color: var(--text-muted); }
@media (max-width: 900px) { .team-grid { grid-template-columns: repeat(2, 1fr); } }

/* helper */
.center { text-align: center; }
.mt-0 { margin-top: 0; }
.small-note { font-size: 0.85rem; color: var(--text-muted); }