/* ═══════════════════════════════════════════════════════════════
   SUDOCU — Estilos principales
   Dirección General de Informática · Universidad Nacional de Tucumán
   ═══════════════════════════════════════════════════════════════ */

/* ─── Reset / Base ───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue-50:   #eff6ff;
  --blue-100:  #dbeafe;
  --blue-200:  #bfdbfe;
  --blue-400:  #60a5fa;
  --blue-500:  #3b82f6;
  --blue-600:  #2563eb;
  --blue-700:  #1d4ed8;
  --blue-800:  #1e40af;
  --blue-900:  #1e3a8a;
  --navy:      #0f172a;
  --navy-mid:  #162035;
  --slate-50:  #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --white:     #ffffff;
  --green:     #16a34a;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,.12);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.14);
  --shadow-xl: 0 24px 64px rgba(0,0,0,.16);
  --font:      'Inter', system-ui, -apple-system, sans-serif;
  --transition: .25s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--slate-700);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ─── Container ──────────────────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ─── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 24px; border-radius: var(--radius-sm);
  font-size: .9rem; font-weight: 600; cursor: pointer;
  border: none; transition: var(--transition); white-space: nowrap;
}
.btn-primary {
  background: var(--blue-600); color: var(--white);
  box-shadow: 0 2px 8px rgba(37,99,235,.4);
}
.btn-primary:hover { background: var(--blue-700); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(37,99,235,.45); }

.btn-primary-light {
  background: var(--white); color: var(--blue-800);
  box-shadow: 0 2px 8px rgba(0,0,0,.15);
}
.btn-primary-light:hover { background: var(--blue-50); transform: translateY(-1px); }

.btn-ghost-light {
  background: rgba(255,255,255,.12); color: var(--white);
  border: 1.5px solid rgba(255,255,255,.3);
}
.btn-ghost-light:hover { background: rgba(255,255,255,.22); border-color: rgba(255,255,255,.6); }

.btn-ghost {
  background: transparent; color: var(--slate-700);
  border: 1.5px solid var(--slate-200);
}
.btn-ghost:hover { background: var(--slate-50); }

.btn-nav {
  background: var(--white); color: var(--blue-800);
  font-size: .82rem; padding: 8px 18px; border-radius: var(--radius-sm);
}
.btn-nav:hover { background: var(--blue-50); }
.navbar.scrolled .btn-nav { background: var(--blue-600); color: var(--white); }
.navbar.scrolled .btn-nav:hover { background: var(--blue-700); }

.btn-lg { padding: 14px 32px; font-size: 1rem; border-radius: var(--radius-md); }
.btn-full { width: 100%; justify-content: center; padding: 13px; font-size: .95rem; border-radius: var(--radius-md); }

/* ─── Section commons ────────────────────────────────────────── */
.section-tag {
  display: inline-block;
  background: var(--blue-50); color: var(--blue-700);
  font-size: .72rem; font-weight: 700; letter-spacing: .09em;
  text-transform: uppercase; padding: 5px 14px; border-radius: 99px;
  margin-bottom: 16px;
}
.section-tag.light {
  background: rgba(255,255,255,.15); color: rgba(255,255,255,.9);
}
.section-header { text-align: center; margin-bottom: 56px; }
.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.4rem);
  font-weight: 800; color: var(--navy); line-height: 1.2; margin-bottom: 16px;
}
.section-title.light { color: var(--white); }
.section-desc { font-size: 1rem; color: var(--slate-500); max-width: 540px; margin: 0 auto; }
.section-desc.light { color: rgba(255,255,255,.75); }

/* ─── Animations ─────────────────────────────────────────────── */
.fade-in { opacity: 0; transform: translateY(20px); animation: fadeUp .7s forwards; }
.delay-1 { animation-delay: .15s; }
.delay-2 { animation-delay: .3s; }
.delay-3 { animation-delay: .45s; }
.delay-4 { animation-delay: .6s; }
@keyframes fadeUp { to { opacity: 1; transform: none; } }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal.delay-1 { transition-delay: .12s; }
.reveal.delay-2 { transition-delay: .24s; }
.reveal.delay-3 { transition-delay: .36s; }

/* ─── NAVBAR ─────────────────────────────────────────────────── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 14px 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}
.navbar.scrolled {
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(0,0,0,.09);
  padding: 9px 0;
}
.nav-inner { display: flex; align-items: center; gap: 24px; }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon { display: flex; }
.unt-logo-img {
  display: block !important;
  height: 36px !important;
  max-height: 36px !important;
  width: auto !important;
  max-width: 160px !important;
  object-fit: contain;
  flex-shrink: 0;
  filter: brightness(0) invert(1);
  transition: filter var(--transition);
}
.navbar.scrolled .unt-logo-img { filter: none; }
.logo-stack { display: flex; flex-direction: column; gap: 1px; }
.logo-text { font-size: 1.15rem; font-weight: 800; color: var(--white); line-height: 1; }
.navbar.scrolled .logo-text { color: var(--navy); }
.logo-accent { color: var(--blue-400); }
.navbar.scrolled .logo-accent { color: var(--blue-600); }
.logo-sub { font-size: .65rem; font-weight: 500; color: rgba(255,255,255,.65); white-space: nowrap; }
.navbar.scrolled .logo-sub { color: var(--slate-400); }
.nav-link-siglas { font-weight: 700 !important; color: rgba(255,255,255,.95) !important; }
.navbar.scrolled .nav-link-siglas { color: var(--blue-600) !important; }
.nav-link-firma { font-weight: 700 !important; color: rgba(255,255,255,.95) !important; }
.navbar.scrolled .nav-link-firma { color: var(--blue-600) !important; }

.nav-links { display: flex; align-items: center; gap: 24px; margin-left: auto; }
.nav-links a { font-size: .875rem; font-weight: 500; color: rgba(255,255,255,.85); transition: color var(--transition); }
.nav-links a:hover, .nav-links a.active { color: var(--white); }
.navbar.scrolled .nav-links a { color: var(--slate-600); }
.navbar.scrolled .nav-links a:hover, .navbar.scrolled .nav-links a.active { color: var(--blue-700); }

.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; margin-left: auto; padding: 4px;
}
.hamburger span { display: block; width: 24px; height: 2px; background: var(--white); border-radius: 2px; transition: var(--transition); }
.navbar.scrolled .hamburger span { background: var(--slate-700); }

/* ─── HERO ───────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(145deg, var(--blue-900) 0%, #1e3573 40%, #2a1f6e 100%);
  padding: 150px 0 100px;
  position: relative;
  overflow: hidden;
}
.hero-grid {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 56px 56px;
}
.hero::after {
  content: '';
  position: absolute;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(59,130,246,.25), transparent 65%);
  top: -200px; right: -100px;
  border-radius: 50%;
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; max-width: 760px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2);
  border-radius: 99px; padding: 6px 16px;
  font-size: .78rem; font-weight: 600; color: rgba(255,255,255,.9);
  margin-bottom: 28px; backdrop-filter: blur(6px);
}
.badge-dot {
  width: 7px; height: 7px; background: #4ade80; border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(74,222,128,.2);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,100% { box-shadow: 0 0 0 3px rgba(74,222,128,.2); }
  50% { box-shadow: 0 0 0 6px rgba(74,222,128,.08); }
}
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800; color: var(--white); line-height: 1.12; margin-bottom: 22px;
}
.hero-highlight {
  background: linear-gradient(90deg, #60a5fa, #a78bfa);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-desc {
  font-size: 1.05rem; color: rgba(255,255,255,.75);
  max-width: 580px; margin-bottom: 36px; line-height: 1.7;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 44px; }
.hero-chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.18);
  border-radius: 99px; padding: 7px 14px;
  font-size: .8rem; font-weight: 500; color: rgba(255,255,255,.85);
}
.chip svg { width: 14px; height: 14px; opacity: .8; }

/* ─── WHAT IS ────────────────────────────────────────────────── */
.what-is { padding: 100px 0; background: var(--white); }
.what-is-inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 72px; align-items: start;
}
.what-is-text .section-title { text-align: left; }
.what-is-text p {
  color: var(--slate-500); margin-bottom: 18px; font-size: .975rem; line-height: 1.7;
}
.what-is-text p:last-of-type { margin-bottom: 24px; }
.what-is-text strong { color: var(--navy); }
.what-is-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.info-card {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 20px; border: 1px solid var(--slate-200);
  border-radius: var(--radius-md); background: var(--white);
  transition: box-shadow var(--transition), border-color var(--transition);
}
.info-card:hover { box-shadow: var(--shadow-md); border-color: var(--blue-200); }
.info-card-icon {
  width: 40px; height: 40px; background: var(--c); color: var(--ic);
  border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.info-card-icon svg { width: 20px; height: 20px; }
.info-card h4 { font-size: .875rem; font-weight: 700; color: var(--navy); margin-bottom: 5px; }
.info-card p { font-size: .82rem; color: var(--slate-500); line-height: 1.55; }

/* ─── ACCESS SECTION ─────────────────────────────────────────── */
.access-section {
  padding: 100px 0;
  background: linear-gradient(160deg, var(--blue-900) 0%, var(--blue-800) 100%);
  position: relative; overflow: hidden;
}
.access-section::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}
.access-section .section-header { position: relative; z-index: 1; }
.access-steps {
  display: grid; grid-template-columns: repeat(4, 1fr);
  align-items: start; gap: 0; position: relative; z-index: 1;
}
.access-connector {
  width: 1px; background: rgba(255,255,255,.2); margin-top: 36px;
  align-self: flex-start;
}
.access-step {
  padding: 0 20px;
  display: flex; flex-direction: column; gap: 16px;
}
.access-step-num {
  width: 52px; height: 52px;
  background: var(--blue-500);
  border: 3px solid rgba(255,255,255,.2);
  color: var(--white); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.15rem; font-weight: 800;
  box-shadow: 0 4px 16px rgba(0,0,0,.3);
  flex-shrink: 0;
}
.access-step-body h3 { font-size: .975rem; font-weight: 700; color: var(--white); margin-bottom: 10px; }
.access-step-body p { font-size: .875rem; color: rgba(255,255,255,.7); line-height: 1.65; }
.access-link {
  display: inline-block; margin-top: 10px;
  font-size: .82rem; font-weight: 600; color: var(--blue-200);
  border-bottom: 1px solid rgba(147,197,253,.3);
  transition: color var(--transition);
}
.access-link:hover { color: var(--white); }
.access-data-list { margin-top: 10px; display: flex; flex-direction: column; gap: 6px; }
.access-data-list li {
  display: flex; align-items: center; gap: 8px;
  font-size: .82rem; color: rgba(255,255,255,.75);
}
.data-bullet { color: var(--blue-300, #93c5fd); font-size: 1.1rem; }
.access-note {
  display: flex; align-items: flex-start; gap: 12px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius-md); padding: 18px 22px;
  margin-top: 40px; position: relative; z-index: 1;
}
.access-note svg { color: var(--blue-200); flex-shrink: 0; margin-top: 2px; }
.access-note p { font-size: .875rem; color: rgba(255,255,255,.75); line-height: 1.6; }

/* ─── TUTORIALS ──────────────────────────────────────────────── */
.tutorials { padding: 100px 0; background: var(--slate-50); }

.tutorial-filters {
  display: flex; flex-wrap: wrap; gap: 10px;
  justify-content: center; margin-bottom: 48px;
}
.filter-btn {
  padding: 8px 20px; border-radius: 99px;
  border: 1.5px solid var(--slate-200);
  background: var(--white); color: var(--slate-600);
  font-size: .85rem; font-weight: 600; cursor: pointer;
  transition: var(--transition); font-family: var(--font);
}
.filter-btn:hover { border-color: var(--blue-300); color: var(--blue-700); background: var(--blue-50); }
.filter-btn.active { background: var(--blue-700); color: var(--white); border-color: var(--blue-700); }

.videos-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.video-card {
  background: var(--white); border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}
.video-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.video-card.hidden { display: none; }
.video-thumb {
  position: relative; padding-bottom: 56.25%; background: var(--navy);
}
.video-thumb iframe {
  position: absolute; inset: 0; width: 100%; height: 100%;
}
.video-info { padding: 20px; }
.video-tag {
  display: inline-block;
  background: var(--blue-50); color: var(--blue-700);
  font-size: .68rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .07em; padding: 3px 10px; border-radius: 99px;
  margin-bottom: 10px;
}
.video-tag.expedientes { background: #dcfce7; color: #15803d; }
.video-tag.firma { background: #fef3c7; color: #b45309; }
.video-tag.avanzado { background: #ede9fe; color: #6d28d9; }
.video-info h3 { font-size: .975rem; font-weight: 700; color: var(--navy); margin-bottom: 8px; line-height: 1.3; }
.video-info p { font-size: .85rem; color: var(--slate-500); line-height: 1.6; margin-bottom: 14px; }
.video-meta {
  display: flex; align-items: center; gap: 16px;
  font-size: .78rem; color: var(--slate-400); font-weight: 500;
}
.video-meta span { display: flex; align-items: center; gap: 4px; }

.tutorials-cta {
  display: flex; align-items: center; justify-content: center;
  gap: 20px; flex-wrap: wrap;
  margin-top: 48px; padding: 28px 32px;
  background: linear-gradient(135deg, var(--blue-800), #4c1d95);
  border-radius: var(--radius-xl);
}
.tutorials-cta p { font-size: 1rem; font-weight: 600; color: rgba(255,255,255,.85); }
.tutorials-cta .btn-primary {
  background: var(--white); color: var(--blue-800);
  box-shadow: 0 4px 16px rgba(0,0,0,.2);
}
.tutorials-cta .btn-primary:hover { background: var(--blue-50); }

/* ─── RESOURCES ──────────────────────────────────────────────── */
.resources { padding: 100px 0; background: var(--white); }
.resources-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.resource-card {
  display: flex; flex-direction: column; gap: 0;
  border: 1px solid var(--slate-200); border-radius: var(--radius-lg);
  overflow: hidden; background: var(--white);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.resource-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); border-color: var(--blue-200); }
.resource-icon {
  display: flex; align-items: center; gap: 12px;
  padding: 18px 20px 14px;
  background: linear-gradient(135deg, var(--blue-800), var(--blue-900));
}
.resource-icon.guide { background: linear-gradient(135deg, #065f46, #064e3b); }
.resource-icon.norm { background: linear-gradient(135deg, #581c87, #4c1d95); }
.resource-icon svg { width: 24px; height: 24px; color: rgba(255,255,255,.7); flex-shrink: 0; }
.resource-type {
  font-size: .68rem; font-weight: 800; letter-spacing: .1em;
  color: rgba(255,255,255,.5); text-transform: uppercase;
}
.guide-type { color: rgba(255,255,255,.5); }
.norm-type  { color: rgba(255,255,255,.5); }
.resource-body { padding: 18px 20px; flex: 1; }
.resource-body h3 { font-size: .925rem; font-weight: 700; color: var(--navy); margin-bottom: 8px; line-height: 1.35; }
.resource-body p { font-size: .84rem; color: var(--slate-500); line-height: 1.6; margin-bottom: 12px; }
.resource-meta {
  display: flex; justify-content: space-between;
  font-size: .75rem; color: var(--slate-400); font-weight: 500;
}
.resource-download {
  display: flex; align-items: center; gap: 8px;
  margin: 0 20px 16px;
  padding: 9px 16px; border-radius: var(--radius-sm);
  background: var(--blue-50); color: var(--blue-700);
  font-size: .82rem; font-weight: 600;
  border: 1px solid var(--blue-100);
  transition: var(--transition); width: calc(100% - 40px);
  justify-content: center;
}
.resource-download:hover { background: var(--blue-700); color: var(--white); }

/* ─── FAQ ────────────────────────────────────────────────────── */
.faq-section {
  padding: 100px 0;
  background: linear-gradient(180deg, #eef4ff 0%, var(--white) 100%);
}
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  border: 1px solid var(--slate-200); border-radius: var(--radius-md);
  background: var(--white); overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item[open] { border-color: var(--blue-300); box-shadow: 0 4px 16px rgba(37,99,235,.1); }
.faq-item summary {
  padding: 18px 22px; font-size: .95rem; font-weight: 600; color: var(--navy);
  cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px;
  transition: background var(--transition);
}
.faq-item summary:hover { background: var(--slate-50); }
.faq-item summary::after {
  content: '+'; font-size: 1.3rem; font-weight: 300; color: var(--blue-600);
  flex-shrink: 0; transition: transform var(--transition);
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-body {
  padding: 0 22px 18px; font-size: .9rem; color: var(--slate-500); line-height: 1.7;
  border-top: 1px solid var(--slate-100);
  padding-top: 14px;
}
.faq-body strong { color: var(--navy); }

/* ─── CONTACT ────────────────────────────────────────────────── */
.contact {
  padding: 100px 0;
  background: linear-gradient(145deg, var(--blue-900) 0%, #1a2c6e 100%);
  position: relative; overflow: hidden;
}
.contact::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 56px 56px; pointer-events: none;
}
.contact-inner {
  display: grid; grid-template-columns: 1fr 1.1fr;
  gap: 72px; align-items: start; position: relative; z-index: 1;
}
.contact-info .section-title { text-align: left; }
.contact-info > p { color: rgba(255,255,255,.7); margin-bottom: 36px; font-size: .975rem; line-height: 1.7; }
.contact-items { display: flex; flex-direction: column; gap: 20px; }
.contact-item { display: flex; align-items: flex-start; gap: 14px; }
.contact-icon {
  width: 42px; height: 42px; background: rgba(255,255,255,.1);
  color: var(--blue-200); border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
  border: 1px solid rgba(255,255,255,.12);
}
.contact-icon svg { width: 20px; height: 20px; }
.contact-item strong { display: block; font-size: .875rem; color: rgba(255,255,255,.9); margin-bottom: 3px; }
.contact-item span { font-size: .875rem; color: rgba(255,255,255,.6); }

/* Form */
.contact-form {
  background: var(--white); border-radius: var(--radius-xl);
  padding: 36px; box-shadow: var(--shadow-xl);
  display: flex; flex-direction: column; gap: 18px;
}
.form-title { font-size: 1.15rem; font-weight: 700; color: var(--navy); margin-bottom: 4px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: .8rem; font-weight: 600; color: var(--slate-600); }
.form-group input,
.form-group select,
.form-group textarea {
  padding: 10px 14px; border: 1.5px solid var(--slate-200);
  border-radius: var(--radius-sm); font-size: .875rem;
  font-family: var(--font); color: var(--navy);
  background: var(--white); outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}
.form-group textarea { resize: vertical; min-height: 110px; }
.form-note { font-size: .76rem; color: var(--slate-400); text-align: center; }
.form-success {
  display: none; background: #dcfce7; color: var(--green);
  border-radius: var(--radius-sm); padding: 12px 16px;
  font-size: .875rem; font-weight: 600; text-align: center;
}
.form-success.show { display: block; }

/* ─── FOOTER ─────────────────────────────────────────────────── */
.footer { background: var(--navy); color: rgba(255,255,255,.6); }
.footer-inner {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px; padding: 64px 24px 48px;
  max-width: 1200px; margin: 0 auto;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { font-size: .875rem; line-height: 1.65; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links h4 { font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: rgba(255,255,255,.35); margin-bottom: 6px; }
.footer-links a { font-size: .875rem; color: rgba(255,255,255,.55); transition: color var(--transition); }
.footer-links a:hover { color: var(--white); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 18px 24px; }
.footer-bottom .container {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 8px; font-size: .77rem;
}

/* ─── BOLETÍN OFICIAL ────────────────────────────────────────── */
.boletin-section {
  padding: 100px 0;
  background: linear-gradient(145deg, #7c2d12 0%, #9a3412 40%, #c2410c 100%);
  position: relative; overflow: hidden;
}
.boletin-section::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 48px 48px; pointer-events: none;
}
.boletin-inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 72px; align-items: center; position: relative; z-index: 1;
}
.boletin-text .section-title { text-align: left; color: var(--white); margin-bottom: 16px; }
.boletin-text p {
  color: rgba(255,255,255,.75); font-size: .975rem; line-height: 1.7; margin-bottom: 28px;
}
.boletin-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.25);
  color: rgba(255,255,255,.9); border-radius: 99px; padding: 5px 16px;
  font-size: .72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .09em; margin-bottom: 20px;
}
.boletin-badge svg { flex-shrink: 0; }
.btn-boletin {
  background: var(--white); color: #92400e;
  box-shadow: 0 4px 20px rgba(0,0,0,.2); font-weight: 700;
}
.btn-boletin:hover { background: #fef3c7; transform: translateY(-1px); box-shadow: 0 8px 28px rgba(0,0,0,.25); }
.boletin-graphic { display: flex; align-items: center; justify-content: center; }
.boletin-doc-wrap { position: relative; width: 300px; flex-shrink: 0; }
.boletin-doc-shadow {
  position: absolute; top: 14px; left: -8px; right: 8px; bottom: -14px;
  background: rgba(0,0,0,.25); border-radius: var(--radius-lg); transform: rotate(-4deg);
}
.boletin-doc {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 28px 28px 24px; box-shadow: 0 24px 64px rgba(0,0,0,.35); position: relative;
}
.boletin-doc-top { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.boletin-doc-logo-circle {
  width: 36px; height: 36px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--blue-800), var(--blue-600)); border-radius: 50%;
}
.boletin-doc-header-lines { flex: 1; display: flex; flex-direction: column; gap: 6px; }
.boletin-doc-divider { height: 2px; background: var(--slate-200); margin-bottom: 18px; }
.boletin-doc-body { display: flex; flex-direction: column; gap: 9px; margin-bottom: 22px; }
.boletin-doc-line { height: 7px; background: var(--slate-200); border-radius: 4px; }
.boletin-doc-stamp { display: flex; justify-content: flex-end; }
.boletin-doc-stamp span {
  display: inline-flex; align-items: center; justify-content: center;
  border: 2.5px solid #dc2626; color: #dc2626;
  padding: 4px 12px; border-radius: 4px;
  font-size: .68rem; font-weight: 800; letter-spacing: .18em;
  text-transform: uppercase; transform: rotate(-6deg); opacity: .65;
}

/* ─── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .videos-grid { grid-template-columns: repeat(2, 1fr); }
  .resources-grid { grid-template-columns: repeat(2, 1fr); }
  .what-is-inner { grid-template-columns: 1fr; gap: 48px; }
  .what-is-cards { grid-template-columns: repeat(2, 1fr); }
  .access-steps { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .access-connector { display: none; }
  .contact-inner { grid-template-columns: 1fr; gap: 48px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .hero-inner { max-width: 100%; }
}

@media (max-width: 1024px) {
  .boletin-inner { grid-template-columns: 1fr; }
  .boletin-graphic { display: none; }
  .boletin-section { padding: 80px 0; }
}
@media (max-width: 768px) {
  .nav-links, .btn-nav { display: none; }
  .hamburger { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: fixed; top: 60px; left: 0; right: 0;
    background: rgba(255,255,255,.97);
    backdrop-filter: blur(16px);
    padding: 24px; gap: 18px; z-index: 99;
    border-bottom: 1px solid var(--slate-200);
    box-shadow: var(--shadow-md);
  }
  .nav-links.open a { font-size: .975rem; color: var(--slate-700) !important; }
  .videos-grid { grid-template-columns: 1fr; }
  .resources-grid { grid-template-columns: 1fr; }
  .what-is-cards { grid-template-columns: 1fr; }
  .access-steps { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom .container { flex-direction: column; text-align: center; }
  .hero { padding: 120px 0 80px; }
  .tutorials-cta { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .what-is, .tutorials, .resources, .faq-section, .contact { padding: 72px 0; }
  .access-section { padding: 72px 0; }
  .hero-chips { gap: 8px; }
  .contact-form { padding: 24px; }
}