/* ════════════════════════════════════════════════════════════
   Aula PRO — Landing
   Concepto: A (clean institucional) + C (toque editorial)
   Paleta: navy profundo + crema + acento cobre/dorado
   ════════════════════════════════════════════════════════════ */

:root {
  --c-bg:        #fbf9f5;
  --c-bg-alt:    #f3efe7;
  --c-ink:       #0d1f3c;
  --c-ink-soft:  #2c3a52;
  --c-muted:     #6b7280;
  --c-line:      #e5e0d4;
  --c-accent:    #b8884a;
  --c-accent-d:  #95683a;
  --c-white:     #ffffff;
  --c-success:   #1f6f4f;

  --f-serif: 'Fraunces', 'Times New Roman', Georgia, serif;
  --f-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --r-sm: 6px;
  --r-md: 12px;
  --r-lg: 20px;
  --r-xl: 32px;

  --shadow-card: 0 1px 2px rgba(13,31,60,.04), 0 8px 24px rgba(13,31,60,.06);
  --shadow-hero: 0 20px 60px rgba(13,31,60,.18);

  --container: 1180px;
}

/* ── Reset ────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--f-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-ink);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--c-ink); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--c-accent); }
button { font-family: inherit; cursor: pointer; }
ul { list-style: none; padding: 0; margin: 0; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Tipografía ─────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--f-serif);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--c-ink);
  margin: 0 0 .4em;
}
h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); font-weight: 500; }
h2 { font-size: clamp(2rem, 3.5vw, 3rem); }
h3 { font-size: 1.4rem; }
h4 { font-size: 1rem; font-family: var(--f-sans); font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--c-ink-soft); }
em { font-style: italic; color: var(--c-accent-d); }

p { margin: 0 0 1em; color: var(--c-ink-soft); }
code { font-family: 'Courier New', monospace; background: var(--c-bg-alt); padding: 1px 6px; border-radius: 4px; font-size: .92em; }

.eyebrow {
  display: inline-block;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-accent-d);
  margin-bottom: .8em;
}

/* ── Botones ─────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  padding: 14px 26px;
  border-radius: var(--r-md);
  font-weight: 600;
  font-size: .95rem;
  border: 1.5px solid transparent;
  transition: all .2s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn--primary {
  background: var(--c-ink);
  color: var(--c-white);
}
.btn--primary:hover {
  background: var(--c-accent-d);
  color: var(--c-white);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(13,31,60,.18);
}
.btn--ghost {
  background: transparent;
  color: var(--c-ink);
  border-color: var(--c-ink);
}
.btn--ghost:hover {
  background: var(--c-ink);
  color: var(--c-white);
}
.btn--text {
  background: transparent;
  color: var(--c-ink-soft);
  padding: 14px 8px;
  font-weight: 500;
}
.btn--text:hover { color: var(--c-accent-d); }
.btn--full { width: 100%; }

/* ── Header ──────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251,249,245,.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--c-line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  font-family: var(--f-serif);
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: -.02em;
  display: inline-flex;
  align-items: baseline;
}
.brand-mark { color: var(--c-ink); }
.brand-mark--accent { color: var(--c-accent-d); margin-left: 2px; }
.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.site-nav a {
  font-size: .92rem;
  font-weight: 500;
  color: var(--c-ink-soft);
}
.site-nav a:hover { color: var(--c-ink); }
.site-nav .btn { padding: 10px 18px; font-size: .88rem; }

/* ── Hero ────────────────────────────────────────── */
.hero {
  padding: 80px 0 100px;
  background:
    radial-gradient(1200px 500px at 20% 0%, rgba(184,136,74,.08), transparent 60%),
    radial-gradient(900px 600px at 90% 50%, rgba(13,31,60,.05), transparent 70%),
    var(--c-bg);
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  align-items: center;
}
.hero-title {
  margin-bottom: 24px;
}
.hero-title em {
  font-style: italic;
  color: var(--c-accent-d);
}
.hero-sub {
  font-size: 1.2rem;
  color: var(--c-ink-soft);
  max-width: 480px;
  margin-bottom: 40px;
  line-height: 1.5;
}
.hero-cta {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.hero-bullets {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: .95rem;
  color: var(--c-ink-soft);
}
.hero-bullets li {
  position: relative;
  padding-left: 24px;
}
.hero-bullets li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 14px; height: 2px;
  background: var(--c-accent);
}

/* Hero visual mockup */
.hero-visual {
  position: relative;
}
.visual-card {
  background: var(--c-white);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-hero);
  overflow: hidden;
  border: 1px solid var(--c-line);
  transform: perspective(1200px) rotateY(-4deg) rotateX(2deg);
  transition: transform .4s ease;
}
.visual-card:hover { transform: perspective(1200px) rotateY(-2deg) rotateX(1deg); }
.visual-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: var(--c-bg-alt);
  border-bottom: 1px solid var(--c-line);
}
.visual-bar > span {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--c-line);
}
.visual-url {
  margin-left: 14px;
  font-family: 'Courier New', monospace;
  font-size: .82rem;
  color: var(--c-muted);
  background: var(--c-white);
  padding: 4px 12px;
  border-radius: var(--r-sm);
  flex: 1;
}
.visual-content { padding: 32px; }
.visual-hero-text {
  border-left: 3px solid var(--c-accent);
  padding-left: 16px;
  margin-bottom: 28px;
}
.visual-hero-text strong {
  font-family: var(--f-serif);
  font-weight: 500;
  font-size: 1.4rem;
  color: var(--c-ink);
  display: block;
  line-height: 1.2;
  margin-bottom: 6px;
}
.visual-hero-text p { margin: 0; font-size: .9rem; color: var(--c-muted); }
.visual-courses { display: flex; flex-direction: column; gap: 12px; }
.visual-course {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px;
  background: var(--c-bg);
  border-radius: var(--r-md);
  border: 1px solid var(--c-line);
}
.visual-course strong { display: block; font-size: .95rem; color: var(--c-ink); margin-bottom: 2px; }
.visual-course small { font-size: .78rem; color: var(--c-muted); }
.dot {
  width: 36px; height: 36px;
  border-radius: 8px;
  flex: none;
}
.dot--1 { background: linear-gradient(135deg, #b8884a, #d4a86a); }
.dot--2 { background: linear-gradient(135deg, #0d1f3c, #2c3a52); }
.dot--3 { background: linear-gradient(135deg, #1f6f4f, #3a8a6a); }

/* ── Sections ────────────────────────────────────── */
.section {
  padding: 100px 0;
}
.section--alt {
  background: var(--c-bg-alt);
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 64px;
}
.section-head h2 {
  margin-bottom: 12px;
}
.section-lead {
  font-size: 1.1rem;
  color: var(--c-ink-soft);
}

/* Three-column generic */
.three-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.feature {
  background: var(--c-white);
  padding: 36px 32px;
  border-radius: var(--r-lg);
  border: 1px solid var(--c-line);
  transition: transform .3s ease, box-shadow .3s ease;
}
.feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}
.feature-num {
  font-family: var(--f-serif);
  font-size: 2.2rem;
  font-style: italic;
  color: var(--c-accent);
  font-weight: 400;
  line-height: 1;
  margin-bottom: 20px;
}
.feature h3 { margin-bottom: 10px; }
.feature p { margin: 0; }

/* Features grid (8 cards) */
.grid-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feat-card {
  background: var(--c-white);
  padding: 28px 24px;
  border-radius: var(--r-md);
  border: 1px solid var(--c-line);
  transition: all .25s ease;
}
.feat-card:hover {
  border-color: var(--c-accent);
  transform: translateY(-2px);
}
.feat-icon {
  font-size: 1.8rem;
  margin-bottom: 14px;
}
.feat-card h3 { font-size: 1.1rem; font-family: var(--f-sans); font-weight: 600; margin-bottom: 8px; }
.feat-card p { font-size: .9rem; color: var(--c-ink-soft); margin: 0; line-height: 1.5; }

/* Compare table */
.table-wrap {
  background: var(--c-white);
  border-radius: var(--r-lg);
  border: 1px solid var(--c-line);
  overflow-x: auto;
}
.compare {
  width: 100%;
  border-collapse: collapse;
  font-size: .92rem;
  min-width: 720px;
}
.compare th, .compare td {
  padding: 18px 20px;
  text-align: left;
  border-bottom: 1px solid var(--c-line);
}
.compare thead th {
  font-family: var(--f-sans);
  font-weight: 600;
  font-size: .85rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--c-muted);
  background: var(--c-bg);
}
.compare tbody th {
  font-family: var(--f-sans);
  font-weight: 500;
  font-size: .92rem;
  color: var(--c-ink);
  background: var(--c-bg);
  border-right: 1px solid var(--c-line);
}
.compare td { color: var(--c-ink-soft); }
.compare .col-us {
  background: rgba(184,136,74,.06);
  color: var(--c-ink);
  font-weight: 600;
}
.compare thead .col-us {
  color: var(--c-accent-d);
  font-weight: 700;
  background: rgba(184,136,74,.12);
}
.compare tbody tr:last-child th,
.compare tbody tr:last-child td { border-bottom: none; }

/* Profiles */
.profile {
  background: var(--c-white);
  padding: 36px 32px;
  border-radius: var(--r-lg);
  border: 1px solid var(--c-line);
  display: flex;
  flex-direction: column;
}
.profile-tag {
  display: inline-block;
  align-self: flex-start;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-accent-d);
  background: rgba(184,136,74,.1);
  padding: 6px 12px;
  border-radius: 100px;
  margin-bottom: 20px;
}
.profile h3 { margin-bottom: 12px; font-size: 1.25rem; }
.profile p { flex: 1; margin-bottom: 18px; }
.profile small {
  font-size: .82rem;
  color: var(--c-muted);
  border-top: 1px dashed var(--c-line);
  padding-top: 14px;
}

/* CTA section */
.section--cta {
  background:
    radial-gradient(800px 400px at 80% 100%, rgba(184,136,74,.12), transparent 70%),
    var(--c-ink);
  color: var(--c-white);
}
.section--cta h2,
.section--cta .eyebrow { color: var(--c-white); }
.section--cta .eyebrow { color: rgba(255,255,255,.6); }
.section--cta p { color: rgba(255,255,255,.78); }
.section--cta em { color: #d4a86a; }
.cta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.cta-bullets { margin: 24px 0 32px; display: flex; flex-direction: column; gap: 10px; }
.cta-bullets li {
  position: relative;
  padding-left: 28px;
  color: rgba(255,255,255,.85);
  font-size: .96rem;
}
.cta-bullets li::before {
  content: "✓";
  position: absolute;
  left: 0; top: 0;
  color: var(--c-accent);
  font-weight: 700;
}
.cta-mail {
  font-size: .92rem;
  color: rgba(255,255,255,.6);
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,.12);
}
.cta-mail a { color: #d4a86a; font-weight: 500; }
.cta-mail a:hover { color: var(--c-white); }

/* Form */
.cta-form {
  background: var(--c-white);
  color: var(--c-ink);
  padding: 36px;
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-hero);
}
.form-row {
  margin-bottom: 18px;
}
.form-row label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 6px;
}
.form-row .hint { color: var(--c-muted); font-weight: 400; }
.form-row input,
.form-row textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--c-line);
  border-radius: var(--r-md);
  font-family: var(--f-sans);
  font-size: .96rem;
  color: var(--c-ink);
  background: var(--c-bg);
  transition: border-color .2s ease, background .2s ease;
}
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--c-accent);
  background: var(--c-white);
}
.form-row textarea { resize: vertical; min-height: 100px; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-legal {
  font-size: .78rem;
  color: var(--c-muted);
  margin: 14px 0 0;
  text-align: center;
  line-height: 1.5;
}

/* Form success/error states (when submit.php redirige con ?ok=1 o ?err=...) */
.form-msg {
  padding: 14px 18px;
  border-radius: var(--r-md);
  margin-bottom: 20px;
  font-size: .92rem;
}
.form-msg--ok { background: rgba(31,111,79,.1); color: var(--c-success); border: 1px solid rgba(31,111,79,.2); }
.form-msg--err { background: rgba(184,68,68,.08); color: #b44444; border: 1px solid rgba(184,68,68,.18); }

/* ── Footer ──────────────────────────────────────── */
.site-footer {
  background: var(--c-bg-alt);
  padding: 60px 0 24px;
  border-top: 1px solid var(--c-line);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 2fr;
  gap: 60px;
  margin-bottom: 40px;
}
.footer-brand p {
  font-size: .9rem;
  color: var(--c-ink-soft);
  margin-top: 12px;
  max-width: 320px;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.footer-cols h4 { margin-bottom: 14px; font-size: .8rem; color: var(--c-muted); }
.footer-cols a {
  display: block;
  font-size: .92rem;
  color: var(--c-ink-soft);
  padding: 4px 0;
}
.footer-cols a:hover { color: var(--c-accent-d); }
.footer-legal {
  border-top: 1px solid var(--c-line);
  padding-top: 24px;
  font-size: .82rem;
  color: var(--c-muted);
  text-align: center;
}
.footer-legal a { color: var(--c-ink-soft); font-weight: 500; }
.footer-legal a:hover { color: var(--c-accent-d); }

/* ── Responsive ─────────────────────────────────── */
@media (max-width: 960px) {
  .hero { padding: 60px 0 80px; }
  .hero-grid { grid-template-columns: 1fr; gap: 60px; }
  .hero-visual { max-width: 480px; margin: 0 auto; }
  .visual-card { transform: none; }

  .grid-features { grid-template-columns: repeat(2, 1fr); }
  .three-col { grid-template-columns: 1fr; gap: 20px; }

  .cta-grid { grid-template-columns: 1fr; gap: 40px; }

  .section { padding: 70px 0; }
  .section-head { margin-bottom: 48px; }

  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 640px) {
  .container { padding: 0 18px; }
  .header-inner { height: 64px; }
  .site-nav { gap: 8px; }
  .site-nav a:not(.btn) { display: none; }
  .grid-features { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .cta-form { padding: 24px; }
  h1 { font-size: 2.4rem; }
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
  .visual-card { transform: none; }
}