:root{
  /* Paleta institucional (tomada del certificado oficial): azul marino + negro + blanco */
  --color-bg: #F2F5FA;
  --color-bg-alt: #E7ECF5;
  --color-card: #FFFFFF;
  --color-ink: #21262A;
  --color-ink-soft: #545E6B;
  --color-primary: #063D8F;
  --color-primary-dark: #042C68;
  --color-secondary: #35577E;
  --color-secondary-dark: #223C57;
  --color-gold: #063D8F;
  --color-border: #D7DEEA;
  --color-danger: #B23A3A;
  --color-success: #2E7D4F;
  --color-ink-black: #21262A;
  --radius: 16px;
  --shadow: 0 8px 24px rgba(6,20,45,0.10);
  --font-serif: 'Georgia', 'Iowan Old Style', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  line-height:1.6;
  min-height:100vh;
  position: relative;
}
/* Fondo ambiental: manchas de color difuminadas, contexto para el vidrio esmerilado */
body::before{
  content:"";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(560px circle at 8% 8%, rgba(6,61,143,0.16), transparent 60%),
    radial-gradient(520px circle at 95% 12%, rgba(91,58,140,0.14), transparent 60%),
    radial-gradient(600px circle at 85% 70%, rgba(184,129,30,0.12), transparent 60%),
    radial-gradient(560px circle at 10% 85%, rgba(30,138,122,0.14), transparent 60%),
    radial-gradient(500px circle at 50% 45%, rgba(193,89,79,0.10), transparent 60%),
    var(--color-bg);
}

.container{
  max-width: 860px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header ---------- */
.site-header{
  padding: 22px 0 10px;
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(180deg, var(--color-bg-alt), var(--color-bg));
}
.site-header .container{
  display:flex;
  align-items:center;
  flex-wrap: wrap;
  gap:10px 14px;
}
.site-header .brand-icon{ width:42px; height:42px; flex-shrink:0; }
.site-header-text{ flex: 1; min-width: 200px; }
.site-header h1{
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin: 0;
  color: var(--color-primary-dark);
}
.site-header p{
  margin: 2px 0 0;
  font-size: 0.85rem;
  color: var(--color-ink-soft);
}
.btn-cerrar-sesion{
  flex-shrink: 0;
  margin-left: auto;
  padding: 8px 14px;
  font-size: 0.82rem;
}
@media (max-width: 560px){
  .btn-cerrar-sesion{ padding: 7px 10px; font-size: 0.76rem; }
}

/* ---------- Progress stepper ---------- */
.stepper{
  display:flex;
  justify-content:space-between;
  gap:6px;
  margin: 22px 0 8px;
}
.step{
  flex:1;
  text-align:center;
  padding-bottom:10px;
  border-bottom: 4px solid var(--color-border);
  color: var(--color-ink-soft);
  font-size: 0.75rem;
  font-weight:600;
  transition: all .2s ease;
}
.step .num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:26px;height:26px;
  border-radius:50%;
  background:var(--color-border);
  color:var(--color-ink-soft);
  font-size:0.8rem;
  margin-bottom:6px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.step.active{ border-color: var(--mod-accent, var(--color-primary)); color: var(--mod-accent, var(--color-primary-dark)); }
.step.active .num{ background: var(--mod-accent, var(--color-primary)); color:#fff; box-shadow: 0 3px 10px -2px var(--mod-accent, var(--color-primary)); transform: scale(1.08); }
.step.done{ border-color: var(--mod-accent, var(--color-secondary)); color: var(--mod-accent, var(--color-secondary-dark)); }
.step.done .num{ background: var(--mod-accent, var(--color-secondary)); color:#fff; }
.step.locked .num::after{ content:"🔒"; font-size:0.6rem; }

/* ---------- Screens ---------- */
.screen{ display:none; padding: 28px 0 60px; animation: fadeIn .35s ease; }
.screen.active{ display:block; }
@keyframes fadeIn{ from{opacity:0; transform:translateY(6px);} to{opacity:1; transform:none;} }

.card{
  background: rgba(255,255,255,0.66);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-radius: var(--radius);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,0.7);
  padding: 28px;
  border: 1px solid rgba(255,255,255,0.6);
}

/* ---------- Landing / register ---------- */
.hero{
  text-align:center;
  padding: 10px 0 24px;
}
.cover-frame{
  max-width: 640px;
  margin: 0 auto 22px;
  padding: 8px;
  border-radius: 22px;
  background: linear-gradient(160deg, rgba(255,255,255,0.55), rgba(255,255,255,0.18));
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,0.55);
  box-shadow: 0 16px 34px -14px rgba(20,20,40,0.35), inset 0 1px 0 rgba(255,255,255,0.6);
  perspective: 1100px;
  position: relative;
  overflow: hidden;
}
.cover-frame::after{
  content:"";
  position:absolute; inset:8px;
  border-radius: 16px;
  background: radial-gradient(circle at var(--glare-x,50%) var(--glare-y,25%), rgba(255,255,255,0.55), transparent 55%);
  mix-blend-mode: overlay;
  opacity:0;
  transition: opacity .25s ease;
  pointer-events:none;
}
.cover-frame:hover::after{ opacity:1; }
.cover-img{
  display:block;
  width:100%;
  height:auto;
  border-radius: 16px;
  transform-style: preserve-3d;
  transition: transform .12s ease-out, box-shadow .2s ease;
  box-shadow: 0 12px 28px -12px rgba(20,20,40,0.4);
  animation: bannerFloat 7s ease-in-out infinite;
}
.cover-frame:hover .cover-img{ animation-play-state: paused; box-shadow: 0 22px 38px -14px rgba(20,20,40,0.45); }

.insta-embed-wrap{
  max-width: 400px;
  margin: 0 auto 26px;
}
.insta-embed-label{
  font-weight: 700;
  color: var(--color-primary-dark);
  margin: 0 0 12px;
  font-size: 0.95rem;
}
.insta-btn{ display:inline-flex; }

.hero .hero-illustration{
  width:100%; max-width:420px; margin: 0 auto 10px; display:block;
  filter: drop-shadow(0 16px 24px rgba(6,40,90,0.18));
  animation: float 5s ease-in-out infinite;
}
@keyframes float{ 0%,100%{ transform: translateY(0); } 50%{ transform: translateY(-8px); } }
@media (prefers-reduced-motion: reduce){ .hero .hero-illustration{ animation: none; } }
.hero h2{
  font-family: var(--font-serif);
  font-size: 1.7rem;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}
.hero p.lead{ color: var(--color-ink-soft); max-width: 560px; margin: 0 auto; }

.module-badges{
  display:flex; flex-wrap:wrap; gap:10px; justify-content:center; margin: 20px 0 6px;
}
.module-badge{
  background: rgba(255,255,255,0.55);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.6);
  border-radius: 999px;
  padding: 7px 16px 7px 12px;
  font-size: 0.78rem;
  color: var(--color-ink-soft);
  display:inline-flex; align-items:center; gap:8px;
  box-shadow: 0 4px 12px -6px rgba(20,20,40,0.25);
  transition: transform .2s ease, box-shadow .2s ease;
}
.module-badge:hover{ transform: translateY(-2px); box-shadow: 0 8px 16px -6px rgba(20,20,40,0.3); }
.module-badge .dot{ width:9px; height:9px; border-radius:50%; flex-shrink:0; box-shadow: 0 0 0 3px color-mix(in srgb, var(--dot-color) 25%, transparent); }

form.register-form{ margin-top: 18px; display:flex; flex-direction:column; gap:14px; }
.field{ display:flex; flex-direction:column; gap:6px; text-align:left; }
.field label{ font-size:0.82rem; font-weight:600; color: var(--color-ink-soft); }
.field input, .field select{
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  font-size: 1rem;
  background: var(--color-bg);
  color: var(--color-ink);
}
.field input:focus, .field select:focus{ outline: 2px solid var(--color-primary); outline-offset:1px; }

.row-2{ display:grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 560px){ .row-2{ grid-template-columns: 1fr; } }

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding: 13px 22px;
  border-radius: 12px;
  border: none;
  font-size: 1rem;
  font-weight: 700;
  cursor:pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:active{ transform: scale(0.98) translateY(1px); }
.btn-primary{ background: var(--color-primary); color: #fff; box-shadow: 0 6px 16px -4px rgba(6,61,143,0.55), inset 0 1px 0 rgba(255,255,255,0.25); }
.btn-primary:hover{ background: var(--color-primary-dark); transform: translateY(-2px); box-shadow: 0 10px 20px -6px rgba(6,61,143,0.6), inset 0 1px 0 rgba(255,255,255,0.25); }
.btn-primary:disabled{ background: #d9c9bd; cursor:not-allowed; box-shadow:none; transform:none; }
.btn-secondary{ background: var(--color-secondary); color:#fff; box-shadow: 0 6px 16px -4px rgba(53,87,126,0.5); }
.btn-secondary:hover{ background: var(--color-secondary-dark); transform: translateY(-2px); }
.btn-ghost{ background: rgba(255,255,255,0.4); color: var(--color-ink-soft); border: 1px solid var(--color-border); }
.btn-ghost:hover{ background: var(--color-bg-alt); }
.btn-block{ width:100%; }

/* Botón temático: toma el color del módulo activo */
.btn-mod{
  background: var(--mod-accent, var(--color-primary));
  color: #fff;
  box-shadow: 0 6px 18px -4px color-mix(in srgb, var(--mod-accent, var(--color-primary)) 65%, transparent), inset 0 1px 0 rgba(255,255,255,0.3);
}
.btn-mod:hover{ filter: brightness(0.92); transform: translateY(-2px); }

/* ---------- Module content ---------- */
.module-banner{
  border-radius: 20px;
  margin-bottom: 22px;
  padding: 10px;
  background: linear-gradient(160deg, rgba(255,255,255,0.55), rgba(255,255,255,0.18));
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,0.55);
  box-shadow: 0 14px 30px -14px rgba(20,20,40,0.32), inset 0 1px 0 rgba(255,255,255,0.6);
  perspective: 1000px;
}
.module-banner-frame{
  position: relative;
  border-radius: 14px;
  overflow: hidden;
}
.module-banner-frame::after{
  content:"";
  position:absolute; inset:0;
  background: radial-gradient(circle at var(--glare-x,50%) var(--glare-y,30%), rgba(255,255,255,0.55), transparent 55%);
  mix-blend-mode: overlay;
  opacity:0;
  transition: opacity .25s ease;
  pointer-events:none;
}
.module-banner-frame:hover::after{ opacity:1; }
.module-banner-img{
  display:block;
  width:100%;
  height:auto;
  cursor: default;
  transform-style: preserve-3d;
  transition: transform .12s ease-out, box-shadow .2s ease;
  box-shadow: 0 10px 24px -10px rgba(20,20,40,0.35);
  animation: bannerFloat 6s ease-in-out infinite;
}
.module-banner-frame:hover .module-banner-img{ animation-play-state: paused; box-shadow: 0 20px 34px -12px rgba(20,20,40,0.4); }
@keyframes bannerFloat{ 0%,100%{ transform: translateY(0); } 50%{ transform: translateY(-6px); } }
@media (prefers-reduced-motion: reduce){ .module-banner-img{ animation:none; } }

.module-header{ display:flex; align-items:center; gap:16px; margin-bottom: 6px; }
.module-header .module-icon{
  width:56px; height:56px; flex-shrink:0;
  filter: drop-shadow(0 6px 10px rgba(20,20,40,0.22));
  transition: transform .25s ease;
}
.module-header .module-icon:hover{ transform: translateY(-3px) rotate(-4deg) scale(1.05); }
.module-header .eyebrow{ font-size:0.78rem; text-transform:uppercase; letter-spacing:0.06em; color: var(--color-secondary-dark); font-weight:700; margin:0; }
.module-header h2{ font-family: var(--font-serif); margin: 2px 0 0; color: var(--color-primary-dark); font-size: 1.5rem; }

.module-body{ margin-top: 18px; }
.module-body h3{ color: var(--color-primary-dark); font-size:1.12rem; margin: 26px 0 8px; }
.module-body h3:first-child{ margin-top: 4px; }
.module-body h4{ color: var(--color-secondary-dark); font-size:1rem; margin: 18px 0 6px; }
.module-body p{ margin: 0 0 12px; color: var(--color-ink); }
.module-body ul, .module-body ol{ margin: 0 0 14px; padding-left: 22px; }
.module-body li{ margin-bottom: 6px; }
.module-body a{
  color: var(--mod-accent, var(--color-primary));
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 2px;
}
.module-body a:hover{ filter: brightness(0.85); }
.content-image{
  display:block;
  width:100%;
  max-width: 480px;
  margin: 18px auto 6px;
  border-radius: 14px;
  box-shadow: 0 10px 24px -10px rgba(20,20,40,0.35);
}
.content-image-caption{
  text-align:center;
  font-size: 0.82rem !important;
  color: var(--color-ink-soft) !important;
  margin: 0 0 16px !important;
}
.content-gallery{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 14px 0 18px;
}
.content-gallery img{
  display:block;
  width:100%;
  height: 140px;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: 0 8px 18px -8px rgba(20,20,40,0.35);
  transition: transform .2s ease, box-shadow .2s ease;
}
.content-gallery img:hover{ transform: translateY(-3px) scale(1.02); box-shadow: 0 14px 22px -8px rgba(20,20,40,0.4); }
@media (min-width: 600px){
  .content-gallery img{ height: 190px; }
}
.module-body a::after{ content: " ↗"; font-size: 0.85em; }

.module-actions{ margin-top: 26px; display:flex; justify-content:flex-end; }

/* ---------- Quiz ---------- */
.quiz{ margin-top: 30px; border-top: 2px dashed var(--color-border); padding-top: 24px; }
.quiz-title{ display:flex; align-items:center; gap:10px; }
.quiz-title h3{ margin:0; color: var(--color-primary-dark); font-family: var(--font-serif); }
.quiz-note{ color: var(--color-ink-soft); font-size: 0.88rem; margin: 4px 0 20px; }

.question{
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.6);
  border-radius: 14px;
  padding: 18px 18px 14px;
  margin-bottom: 16px;
  box-shadow: 0 4px 14px -8px rgba(20,20,40,0.2);
  transition: box-shadow .2s ease, transform .2s ease;
}
.question p.q-text{ font-weight: 700; margin: 0 0 12px; }
.option{
  display:flex; align-items:center; gap:10px;
  padding: 9px 10px;
  border-radius: 10px;
  cursor:pointer;
  transition: background .15s ease;
}
.option:hover{ background: rgba(6,61,143,0.08); }
.option input[type=radio]{
  width: 20px; height:20px;
  accent-color: var(--color-primary);
  cursor:pointer;
}
.option span{ font-size: 0.95rem; }
.question.correct{ border-color: var(--color-success); box-shadow: 0 0 0 2px rgba(46,125,79,0.25); }
.question.incorrect{ border-color: var(--color-danger); box-shadow: 0 0 0 2px rgba(178,58,58,0.25); }

.quiz-actions{ display:flex; gap:12px; margin-top: 10px; flex-wrap:wrap; }

.quiz-result{ margin-top: 18px; padding: 16px 18px; border-radius: 14px; font-weight:600; display:none; }
.quiz-result.show{ display:block; }
.quiz-result.pass{ background: rgba(46,125,79,0.12); color: var(--color-success); border:1px solid rgba(46,125,79,0.3); }
.quiz-result.fail{ background: rgba(178,58,58,0.12); color: var(--color-danger); border:1px solid rgba(178,58,58,0.3); }

/* ---------- Certificate screen ---------- */
.cert-screen .card{ text-align:center; }
.cert-screen .cert-illustration{ width:150px; margin: 0 auto 12px; }
.cert-screen h2{ font-family: var(--font-serif); color: var(--color-primary-dark); }
.cert-preview{
  margin: 22px auto; max-width: 640px;
  border: 6px solid var(--color-ink-black);
  border-radius: 4px;
  padding: 10px;
  background: var(--color-primary);
  position: relative;
}
.cert-preview-inner{
  border: 2px solid var(--color-primary);
  border-radius: 2px;
  padding: 30px 16px;
  background: #FFFFFF;
  position: relative;
}
@media (min-width: 480px){
  .cert-preview-inner{ padding: 30px 26px; }
}
.cert-preview-inner::before{
  content:"";
  position:absolute; inset:8px;
  border: 1px solid var(--color-primary);
  pointer-events:none;
}
.cert-logo{ width:64px; height:64px; margin: 0 auto 8px; display:block; }
.cert-preview .cert-titulo{
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 6vw, 2.1rem);
  letter-spacing: 0.03em;
  color: var(--color-primary);
  margin: 4px 0 2px;
}
.cert-preview .cert-kicker{ font-size:0.92rem; font-style: italic; color: var(--color-ink); font-family: var(--font-serif); margin-bottom: 16px; }
.cert-preview .cert-name{ font-family: var(--font-serif); font-size: 1.6rem; color: var(--color-primary); margin: 4px 0 14px; font-weight:bold; }
.cert-preview .cert-course{ font-size: 1rem; color: var(--color-ink); margin-bottom: 6px; }
.cert-preview .cert-fields{
  margin-top: 22px; text-align:left;
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
  font-size: 0.92rem;
  color: var(--color-ink);
  display:flex; flex-wrap:wrap; gap: 8px 26px;
}
.cert-preview .cert-fields b{ color: var(--color-primary); }
.cert-preview .cert-date{ font-size: 0.85rem; color: var(--color-ink-soft); margin: 4px 0 6px; }
.cert-signatures{ display:flex; justify-content:center; gap:40px; margin-top: 22px; flex-wrap:wrap; }
.cert-signatures div{ text-align:center; }
.cert-signatures img{ height:52px; object-fit:contain; display:block; margin: 0 auto 4px; }
.cert-signatures .sig-line{ border-top: 1px solid var(--color-ink-soft); padding-top:4px; font-size:0.82rem; color: var(--color-ink-soft); min-width:150px; }
.cert-signatures .sig-role{ font-size:0.72rem; color: var(--color-ink-soft); }
.cert-footer-inst{ margin-top:18px; font-size:0.72rem; letter-spacing:0.03em; color: var(--color-ink-soft); border-top: 1px solid var(--color-border); padding-top:10px; }

/* ---------- Misc ---------- */
.footer-note{ text-align:center; color: var(--color-ink-soft); font-size: 0.78rem; margin-top: 30px; }
.hidden{ display:none !important; }
.error-msg{ color: var(--color-danger); font-size:0.85rem; margin-top:-6px; }
.locked-msg{
  display:flex; align-items:center; gap:10px;
  background: rgba(154,107,18,0.12);
  border: 1px solid rgba(154,107,18,0.35);
  color: #8a6a1c;
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 0.88rem;
  margin-bottom: 18px;
}