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

:root {
  --navy:       #003366;
  --navy-mid:   #1A5276;
  --navy-light: #2471A3;
  --blue-pale:  #E6F1FB;
  --blue-soft:  #B5D4F4;
  --text:       #1C1C1C;
  --text-muted: #5A5A5A;
  --text-hint:  #999;
  --border:     rgba(0,0,0,0.10);
  --border-md:  rgba(0,0,0,0.18);
  --bg:         #FFFFFF;
  --bg-soft:    #F7F6F3;
  --radius-sm:  3px;
  --radius-md:  6px;
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'Source Serif 4', Georgia, serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.7;
}

a { color: var(--navy-mid); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ─── Nav ─── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 0.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 52px;
  gap: 1rem;
}

.site-nav-brand {
  font-size: 12px;
  font-weight: 600;
  color: var(--navy);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.site-nav-links {
  display: flex;
  gap: 0;
  list-style: none;
  overflow-x: auto;
}

.site-nav-links a {
  display: block;
  padding: 0 14px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 52px;
  border-bottom: 2px solid transparent;
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}

.site-nav-links a:hover,
.site-nav-links a.active {
  color: var(--navy);
  border-bottom-color: var(--navy);
  text-decoration: none;
}

/* ─── Hero ─── */
.hero {
  background: var(--navy);
  color: #fff;
  padding: 5rem 2rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(90deg, rgba(255,255,255,0.025) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(0deg,  rgba(255,255,255,0.015) 0 1px, transparent 1px 64px);
}

.hero-inner {
  position: relative;
  max-width: 780px;
  margin: 0 auto;
}

.hero-eyebrow {
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--blue-soft);
  font-weight: 300;
  margin-bottom: 0.25rem;
}

.hero-institution {
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #7AAED6;
  font-weight: 300;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  color: #fff;
  margin-bottom: 0.75rem;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--blue-soft);
  font-weight: 300;
  font-style: italic;
  margin-bottom: 2.5rem;
}

.hero-meta {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: #D6E8FA;
  font-weight: 300;
}

.hero-meta-item i { font-size: 17px; color: var(--blue-soft); }

/* ─── CTA Bar ─── */
.cta-bar {
  background: var(--navy-mid);
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.cta-bar p { font-size: 14px; color: #D6E8FA; font-weight: 300; }

.btn-primary {
  display: inline-block;
  background: #fff;
  color: var(--navy);
  border: none;
  padding: 10px 24px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: opacity 0.15s;
  text-decoration: none;
}

.btn-primary:hover { opacity: 0.87; text-decoration: none; }

/* ─── Layout ─── */
.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 3.5rem 0;
  border-bottom: 0.5px solid var(--border);
}

.section:last-of-type { border-bottom: none; }

.section-label {
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-hint);
  font-weight: 400;
  margin-bottom: 0.5rem;
}

.section h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1.25rem;
  line-height: 1.25;
}

.lead {
  font-size: 15px;
  color: var(--text-muted);
  font-weight: 300;
  line-height: 1.8;
  max-width: 620px;
}

.lead + .lead { margin-top: 0.75rem; }

/* ─── Cronograma ─── */
.tabs {
  display: flex;
  border-bottom: 0.5px solid var(--border-md);
  margin-top: 1.5rem;
}

.tab-btn {
  padding: 10px 22px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-bottom: 2.5px solid transparent;
  margin-bottom: -0.5px;
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: color 0.15s, border-color 0.15s;
}

.tab-btn:hover { color: var(--navy); }
.tab-btn.active { color: var(--navy); border-bottom-color: var(--navy); font-weight: 600; }

.tab-panel { display: none; }
.tab-panel.visible { display: block; }

.schedule-list { display: flex; flex-direction: column; }

.schedule-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 0 1.25rem;
  padding: 1rem 0;
  border-top: 0.5px solid var(--border);
  align-items: start;
}

.schedule-item:first-child { border-top: none; }

.schedule-time {
  font-size: 12px;
  font-weight: 600;
  color: var(--navy-mid);
  padding-top: 3px;
  letter-spacing: 0.04em;
}

.schedule-title { font-size: 14px; font-weight: 400; color: var(--text); margin-bottom: 2px; }
.schedule-place { font-size: 12px; color: var(--text-hint); font-style: italic; font-weight: 300; }

/* ─── Speakers ─── */
.speakers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 14px;
  margin-top: 1.5rem;
}

.speaker-card {
  background: var(--bg-soft);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: border-color 0.15s;
}

.speaker-card:hover { border-color: var(--border-md); }

.speaker-avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--navy);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 600; color: var(--blue-soft);
  margin-bottom: 0.85rem; letter-spacing: 0.05em;
}

.speaker-name { font-size: 14px; font-weight: 600; color: var(--text); margin-bottom: 3px; }
.speaker-role { font-size: 12px; color: var(--text-hint); font-style: italic; font-weight: 300; line-height: 1.45; }

/* ─── Formulario ─── */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 1.5rem;
  max-width: 600px;
}

.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group.full { grid-column: 1 / -1; }

label { font-size: 12px; color: var(--text-muted); font-weight: 400; letter-spacing: 0.03em; }

input[type="text"],
input[type="email"],
select {
  width: 100%;
  padding: 10px 13px;
  border: 0.5px solid var(--border-md);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text);
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
  appearance: none;
  -webkit-appearance: none;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--navy-light);
  box-shadow: 0 0 0 3px rgba(36,113,163,0.12);
}

.btn-submit {
  display: inline-block;
  background: var(--navy);
  color: #E6F1FB;
  border: none;
  padding: 12px 28px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  letter-spacing: 0.04em;
  margin-top: 6px;
  transition: opacity 0.15s;
}

.btn-submit:hover { opacity: 0.88; }
.btn-submit:disabled { opacity: 0.55; cursor: not-allowed; }

.form-status {
  display: none;
  margin-top: 14px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 300;
}

.form-status.success {
  background: #EAF3DE;
  color: #27500A;
  border: 0.5px solid #97C459;
}

.form-status.error {
  background: #FCEBEB;
  color: #791F1F;
  border: 0.5px solid #F09595;
}

.form-note { font-size: 12px; color: var(--text-hint); font-style: italic; margin-top: 0.5rem; font-weight: 300; }

/* ─── Contacto ─── */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.contact-item { display: flex; gap: 12px; align-items: flex-start; }
.contact-icon { font-size: 20px; color: var(--navy-mid); margin-top: 2px; flex-shrink: 0; }
.contact-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--text-hint); font-weight: 400; margin-bottom: 2px; }
.contact-value { font-size: 14px; color: var(--text); font-weight: 300; }

/* ─── Footer ─── */
footer {
  background: var(--navy);
  color: var(--blue-soft);
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

footer p { font-size: 12px; font-weight: 300; }
footer a { font-size: 12px; color: var(--blue-soft); }
footer a:hover { color: #fff; }

/* ─── Responsive ─── */
@media (max-width: 600px) {
  .site-nav-brand { display: none; }
  .hero { padding: 3rem 1.25rem 2.5rem; }
  .cta-bar { flex-direction: column; align-items: flex-start; }
  .form-grid { grid-template-columns: 1fr; }
  .form-group.full { grid-column: 1; }
  .container { padding: 0 1.25rem; }
  .tabs { overflow-x: auto; }
}

/* ─── Animación entrada ─── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-inner > * {
  animation: fadeUp 0.6s ease both;
}

.hero-inner > *:nth-child(1) { animation-delay: 0.05s; }
.hero-inner > *:nth-child(2) { animation-delay: 0.10s; }
.hero-inner > *:nth-child(3) { animation-delay: 0.18s; }
.hero-inner > *:nth-child(4) { animation-delay: 0.26s; }
.hero-inner > *:nth-child(5) { animation-delay: 0.34s; }

/* ─── Credencial ─── */
.credential-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,10,30,0.78);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  overflow-y: auto;
}
.credential-overlay.open { display: flex; }

.credential-wrapper {
  background: #fff;
  border-radius: var(--radius-md);
  max-width: 460px;
  width: 100%;
  padding: 1.75rem;
  position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.credential-close {
  position: absolute;
  top: 0.85rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  color: var(--text-muted);
  font-weight: 300;
  transition: color 0.15s;
}
.credential-close:hover { color: var(--text); }

.credential-card {
  border: 1px solid var(--border-md);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.credential-head {
  background: var(--navy);
  padding: 0.85rem 1.1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.credential-head-brand {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue-soft);
}

.credential-head-badge {
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  background: rgba(255,255,255,0.1);
  color: #fff;
  padding: 3px 9px;
  border-radius: 2px;
  border: 0.5px solid rgba(255,255,255,0.22);
}

.credential-event-band {
  background: var(--navy-mid);
  padding: 0.6rem 1.1rem;
}

.credential-event-band h3 {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 2px;
  line-height: 1.25;
}

.credential-event-band p {
  font-size: 11px;
  color: var(--blue-soft);
  font-weight: 300;
}

.credential-body {
  display: flex;
  gap: 1rem;
  padding: 1.1rem 1.1rem;
  align-items: flex-start;
  background: #fff;
}

.credential-info { flex: 1; min-width: 0; }

.credential-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 5px;
  line-height: 1.2;
}

.credential-doc-line {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.credential-nat-line {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.credential-role-line {
  font-size: 12px;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 8px;
}

.credential-dias-line {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--navy-mid);
  background: var(--blue-pale);
  padding: 3px 8px;
  border-radius: 2px;
}

.credential-id-line {
  font-size: 10px;
  color: var(--text-hint);
  margin-top: 8px;
  font-family: monospace;
  letter-spacing: 0.03em;
}

.credential-qr-box { flex-shrink: 0; }
.credential-qr-box canvas,
.credential-qr-box img { display: block; border-radius: 2px; }

.credential-foot {
  background: var(--bg-soft);
  border-top: 0.5px solid var(--border);
  padding: 0.5rem 1.1rem;
  text-align: center;
}

.credential-foot p {
  font-size: 10px;
  color: var(--text-hint);
  letter-spacing: 0.04em;
}

.credential-actions {
  display: flex;
  gap: 10px;
  margin-top: 1.1rem;
  justify-content: flex-end;
  align-items: center;
}

.btn-credential-print {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--navy);
  color: #fff;
  border: none;
  padding: 9px 18px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: opacity 0.15s;
}
.btn-credential-print:hover { opacity: 0.88; }

.btn-credential-close {
  background: transparent;
  color: var(--text-muted);
  border: 0.5px solid var(--border-md);
  padding: 9px 18px;
  font-family: var(--font-body);
  font-size: 13px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: border-color 0.15s;
}
.btn-credential-close:hover { border-color: var(--text-muted); }

.btn-view-credential {
  display: inline-block;
  background: none;
  border: 0.5px solid #97C459;
  color: #27500A;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
  letter-spacing: 0.04em;
  transition: background 0.15s;
}
.btn-view-credential:hover { background: rgba(151,196,89,0.15); }

@media (max-width: 600px) {
  .credential-body { flex-direction: column-reverse; align-items: center; }
  .credential-qr-box { margin-bottom: 0.5rem; }
}

@media print {
  body > *:not(#credential-modal) { display: none !important; }
  #credential-modal {
    display: block !important;
    position: static;
    background: none;
    padding: 0;
  }
  .credential-wrapper { box-shadow: none; padding: 0; }
  .credential-close,
  .credential-actions { display: none !important; }
}