/* ============================================================
   COPSA — styles.css
   ============================================================ */

/* --- Variables & Reset --- */
:root {
  --azul: #1C345B;
  --azul-mid: #1a2e52;
  --grad-a: #918EFF;
  --grad-b: #3973FF;
  --violeta: #8150DF;
  --rosa: #C192F7;
  --verde: #00C2DF;
  --blanco: #FFFFFF;
  --gris-tenue: rgba(255,255,255,0.07);
  --gris-borde: rgba(255,255,255,0.12);
  --nav-h: 72px;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

body {
  font-family: 'Lexend', sans-serif;
  background: var(--azul);
  color: var(--blanco);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* --- Font --- */
@font-face {
  font-family: 'Lexend';
  src: url('../assets/fonts/Lexend-VariableFont_wght.ttf') format('truetype');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* ─── Utilities ─────────────────────────────────────────── */

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 32px;
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap;
}

/* Gradient text */
.grad-text {
  background: linear-gradient(135deg, var(--grad-a) 0%, var(--grad-b) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Section heading pattern */
.section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--grad-a);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-label::before {
  content: '';
  display: inline-block;
  width: 28px; height: 2px;
  background: linear-gradient(90deg, var(--grad-a), var(--grad-b));
  border-radius: 2px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-sub {
  font-size: 1.05rem;
  font-weight: 300;
  opacity: 0.7;
  max-width: 560px;
  line-height: 1.7;
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.revealed {
  opacity: 1;
  transform: none;
}

/* Line texture overlay */
.lines-bg {
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 7px,
    rgba(255,255,255,0.025) 7px,
    rgba(255,255,255,0.025) 8px
  );
}

/* ─── Nav ───────────────────────────────────────────────── */

#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(17, 27, 48, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: background var(--transition), box-shadow var(--transition);
}
#nav.nav--scrolled {
  background: rgba(17, 27, 48, 0.92);
  box-shadow: 0 1px 0 var(--gris-borde);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
}

.nav-logo {
  height: 32px;
  width: auto;
  display: block;
  flex-shrink: 0;
}
/* Restore gradient O */
.nav-logo-wrap {
  display: flex;
  align-items: center;
}

#nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

#nav-links a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.03em;
  padding: 6px 14px;
  border-radius: 999px;
  transition: color var(--transition), background var(--transition);
}
#nav-links a:hover,
#nav-links a.active {
  color: var(--blanco);
  background: rgba(145,142,255,0.15);
}

#nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}
#nav-burger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--blanco);
  border-radius: 2px;
  transition: var(--transition);
}
#nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
#nav-burger.open span:nth-child(2) { opacity: 0; }
#nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─── Hero ──────────────────────────────────────────────── */

#hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  text-align: center;
}

.hero-video {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 55% 45% at 50% 32%, rgba(17,27,48,0.78) 0%, transparent 100%),
    linear-gradient(
      to bottom,
      rgba(17, 27, 48, 0.55) 0%,
      rgba(17, 27, 48, 0.70) 60%,
      var(--azul) 100%
    );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 820px;
  padding: 0 24px;
}

.hero-logo {
  height: 64px;
  width: auto;
  margin: 0 auto 36px;
  display: block;
  filter: drop-shadow(0 2px 24px rgba(17,27,48,0.9));
}

.hero-eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--grad-a);
  margin-bottom: 16px;
}

.hero-title {
  font-size: clamp(2rem, 5.5vw, 4rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  margin-bottom: 32px;
  color: var(--blanco);
}

.hero-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 48px;
}

.hero-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 999px;
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 500;
}
.hero-badge .icon {
  font-size: 14px;
  opacity: 0.8;
}

.hero-date { font-weight: 600; }
.hero-location { opacity: 0.85; }
.hero-time { opacity: 0.85; }

.hero-scroll {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0.4;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity var(--transition);
  text-decoration: none;
  color: var(--blanco);
}
.hero-scroll:hover { opacity: 0.8; }
.hero-scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--blanco), transparent);
  animation: scrollLine 1.8s ease-in-out infinite;
}
@keyframes scrollLine {
  0%, 100% { transform: scaleY(1); opacity: 0.4; }
  50% { transform: scaleY(0.6); opacity: 1; }
}

/* ─── Sections — layout base ────────────────────────────── */

section {
  padding: 100px 0;
}

section:nth-child(even) {
  background: rgba(0,0,0,0.15);
}

.section-header {
  margin-bottom: 60px;
}

/* ─── Antecedentes ──────────────────────────────────────── */

#antecedentes {
  background: var(--azul);
}

.antecedentes-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
  align-items: start;
}

.antecedentes-deco {
  position: sticky;
  top: calc(var(--nav-h) + 40px);
}

.deco-o {
  width: 100%;
  max-width: 280px;
  opacity: 0.85;
}

.antecedentes-p {
  font-size: 1.1rem;
  font-weight: 300;
  line-height: 1.8;
  opacity: 0.85;
  margin-bottom: 20px;
}
.antecedentes-p:last-child { margin-bottom: 0; }

/* ─── Placeholder ───────────────────────────────────────── */

.placeholder-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 40px;
  border: 1px dashed var(--gris-borde);
  border-radius: var(--radius-lg);
  background: var(--gris-tenue);
  min-height: 200px;
}
.placeholder-icon {
  font-size: 28px;
  margin-bottom: 16px;
  opacity: 0.4;
  background: linear-gradient(135deg, var(--grad-a), var(--grad-b));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.placeholder-label {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 8px;
  opacity: 0.6;
}
.placeholder-sub {
  font-size: 0.875rem;
  opacity: 0.4;
  max-width: 340px;
  line-height: 1.6;
}

/* ─── Programa ──────────────────────────────────────────── */

#programa {
  background: rgba(0,0,0,0.18);
}

.programa-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

/* Vertical line */
.programa-list::before {
  content: '';
  position: absolute;
  left: 130px;
  top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--gris-borde) 10%, var(--gris-borde) 90%, transparent);
}

.programa-item {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 0 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--gris-tenue);
  position: relative;
  transition: background var(--transition);
}
.programa-item:last-child { border-bottom: none; }
.programa-item:hover {
  background: rgba(255,255,255,0.02);
  border-radius: var(--radius);
}

/* Dot on timeline */
.programa-item::before {
  content: '';
  position: absolute;
  left: 124px;
  top: 36px;
  width: 13px; height: 13px;
  border-radius: 50%;
  border: 2px solid var(--azul);
  background: var(--gris-borde);
  z-index: 1;
}

.programa-item--panel::before {
  background: linear-gradient(135deg, var(--grad-a), var(--grad-b));
  border-color: transparent;
}
.programa-item--break::before {
  background: rgba(255,255,255,0.2);
}
.programa-item--apertura::before,
.programa-item--cierre::before {
  background: var(--verde);
  border-color: transparent;
}
.programa-item--presentacion::before {
  background: var(--rosa);
  border-color: transparent;
}

.programa-time {
  padding-top: 8px;
  text-align: right;
  padding-right: 40px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: rgba(255,255,255,0.45);
  line-height: 1.4;
}

.time-sep {
  display: block;
  font-weight: 300;
  opacity: 0.5;
}

.programa-body {
  padding: 4px 0;
}

.programa-tipo-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
  background: var(--gris-tenue);
  border: 1px solid var(--gris-borde);
}

.programa-item--panel .programa-tipo-badge {
  background: rgba(145, 142, 255, 0.12);
  border-color: rgba(145, 142, 255, 0.3);
  color: var(--grad-a);
}
.programa-item--presentacion .programa-tipo-badge {
  background: rgba(193, 146, 247, 0.12);
  border-color: rgba(193, 146, 247, 0.3);
  color: var(--rosa);
}
.programa-item--break .programa-tipo-badge {
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.5);
}

.programa-titulo {
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 4px;
}

.programa-item--break .programa-titulo {
  opacity: 0.5;
  font-weight: 400;
}

.programa-item-sub {
  font-size: 0.9rem;
  opacity: 0.6;
  margin-bottom: 12px;
  font-weight: 300;
}

.speakers-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.speaker-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--gris-borde);
  border-radius: 999px;
  padding: 4px 12px 4px 4px;
  transition: background var(--transition);
}
.speaker-chip:hover {
  background: rgba(145,142,255,0.1);
}
.chip-name {
  font-size: 12px;
  font-weight: 500;
}
.chip-cargo {
  font-size: 11px;
  font-weight: 400;
  opacity: 0.45;
}
.chip-cargo::before {
  content: '·';
  margin-right: 4px;
}

.moderador-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.mod-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.45;
}

/* ─── Avatars ───────────────────────────────────────────── */

.avatar {
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.avatar--xs { width: 24px; height: 24px; }
.avatar--sm { width: 40px; height: 40px; }
.avatar--md { width: 72px; height: 72px; }
.avatar--lg { width: 120px; height: 120px; }

.avatar--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(145,142,255,0.2), rgba(57,115,255,0.2));
  border: 1px solid rgba(145,142,255,0.25);
  font-weight: 700;
  color: var(--grad-a);
  letter-spacing: 0.05em;
}
.avatar--xs.avatar--placeholder { font-size: 8px; }
.avatar--sm.avatar--placeholder { font-size: 13px; }
.avatar--md.avatar--placeholder { font-size: 22px; }
.avatar--lg.avatar--placeholder { font-size: 34px; }

/* ─── Speakers ──────────────────────────────────────────── */

#speakers {
  background: var(--azul);
}

.speakers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.speaker-card {
  background: var(--gris-tenue);
  border: 1px solid var(--gris-borde);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
  cursor: default;
}
.speaker-card:hover {
  border-color: rgba(145,142,255,0.4);
  transform: translateY(-3px);
}
.speaker-card[data-has-bio="true"] {
  cursor: pointer;
}

.speaker-card-inner {
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
}

.speaker-photo-wrap {
  position: relative;
  display: inline-block;
}

.photo-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(17,27,48,0.5);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0;
  transition: opacity var(--transition);
  color: rgba(255,255,255,0.6);
  text-align: center;
  padding: 0 8px;
}
.speaker-photo-wrap:hover .photo-overlay { opacity: 1; }

.speaker-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.speaker-name {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.3;
}

.speaker-cargo {
  font-size: 0.78rem;
  font-weight: 400;
  opacity: 0.55;
  line-height: 1.4;
}

.btn-cv {
  margin-top: 8px;
  font-family: 'Lexend', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 6px 16px;
  background: rgba(145,142,255,0.12);
  border: 1px solid rgba(145,142,255,0.3);
  border-radius: 999px;
  color: var(--grad-a);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}
.btn-cv:hover {
  background: rgba(145,142,255,0.22);
  border-color: var(--grad-a);
}

/* ─── Presentaciones ────────────────────────────────────── */

#presentaciones {
  background: rgba(0,0,0,0.18);
}

.presentaciones-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.pres-card {
  background: var(--gris-tenue);
  border: 1px solid var(--gris-borde);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), transform var(--transition);
}
.pres-card:hover {
  border-color: rgba(145,142,255,0.35);
  transform: translateY(-2px);
}

.pres-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 22px 16px;
  border-bottom: 1px solid var(--gris-tenue);
}

.pres-speaker-name {
  font-size: 0.9rem;
  font-weight: 600;
}
.pres-speaker-cargo {
  font-size: 0.75rem;
  opacity: 0.5;
  margin-top: 2px;
}

.pres-card-panel-header {
  padding: 22px 22px 16px;
  border-bottom: 1px solid var(--gris-tenue);
}

.pres-panel-titulo {
  font-size: 0.95rem;
  font-weight: 600;
  margin-top: 6px;
}
.pres-panel-sub {
  font-size: 0.8rem;
  opacity: 0.5;
  margin-top: 4px;
}

.pres-card-body {
  padding: 16px 22px 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  justify-content: flex-end;
}

.pres-tipo {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--grad-a);
  opacity: 0.7;
}

.pres-card--panel .pres-tipo {
  color: var(--grad-a);
}

.pres-speakers-mini {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.pres-chip {
  font-size: 11px;
  font-weight: 500;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--gris-borde);
  border-radius: 999px;
  padding: 3px 10px;
  opacity: 0.7;
}

.pres-soon {
  display: flex;
  align-items: center;
}
.pres-soon span {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.35;
  border: 1px dashed rgba(255,255,255,0.2);
  border-radius: 999px;
  padding: 6px 16px;
}

.btn-pres {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'Lexend', sans-serif;
  font-size: 13px;
  font-weight: 600;
  padding: 10px 20px;
  background: linear-gradient(135deg, rgba(145,142,255,0.18), rgba(57,115,255,0.18));
  border: 1px solid rgba(145,142,255,0.35);
  border-radius: 999px;
  color: var(--blanco);
  text-decoration: none;
  transition: background var(--transition), border-color var(--transition);
}
.btn-pres:hover {
  background: linear-gradient(135deg, rgba(145,142,255,0.3), rgba(57,115,255,0.3));
  border-color: var(--grad-a);
}

/* ─── Grabaciones ───────────────────────────────────────── */

#grabaciones {
  background: var(--azul);
}

.grabaciones-grid {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.grabacion-card {
  display: grid;
  grid-template-columns: 1fr 1.8fr;
  gap: 40px;
  align-items: start;
  background: var(--gris-tenue);
  border: 1px solid var(--gris-borde);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: border-color var(--transition);
}
.grabacion-card:hover {
  border-color: rgba(145,142,255,0.3);
}

.grabacion-tipo {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--grad-a);
  margin-bottom: 12px;
}
.grabacion-titulo {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 6px;
}
.grabacion-sub {
  font-size: 0.85rem;
  opacity: 0.5;
  margin-bottom: 20px;
}
.grabacion-speakers {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.vimeo-wrap {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: #000;
}
.vimeo-wrap iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border-radius: var(--radius);
}

.vimeo-placeholder {
  position: relative;
  padding-bottom: 56.25%;
  border-radius: var(--radius);
  background: rgba(0,0,0,0.3);
  border: 1px dashed var(--gris-borde);
  overflow: hidden;
}
.vimeo-placeholder span {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.3;
}

.grabaciones-soon {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 100px 40px;
  border: 1px dashed var(--gris-borde);
  border-radius: var(--radius-lg);
  background: var(--gris-tenue);
}
.grabaciones-soon-icon {
  font-size: 40px;
  margin-bottom: 24px;
  opacity: 0.2;
  line-height: 1;
}
.grabaciones-soon h3 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 12px;
}
.grabaciones-soon p {
  font-size: 0.95rem;
  opacity: 0.45;
  line-height: 1.7;
}

/* ─── Modal ─────────────────────────────────────────────── */

#modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10,16,30,0.7);
  backdrop-filter: blur(6px);
  z-index: 200;
}
#modal-overlay.active { display: block; }

#modal {
  display: none;
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  z-index: 201;
  width: 90%;
  max-width: 580px;
  max-height: 80vh;
  background: #0e1a30;
  border: 1px solid var(--gris-borde);
  border-radius: var(--radius-lg);
  overflow-y: auto;
  padding: 40px;
  transition: transform 0.25s ease, opacity 0.25s ease;
  opacity: 0;
}
#modal.active {
  display: block;
  transform: translate(-50%, -50%) scale(1);
  opacity: 1;
}

.modal-header {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 24px;
}
.modal-text h2 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.modal-text p {
  font-size: 0.85rem;
  opacity: 0.55;
}
#modal-bio {
  font-size: 0.95rem;
  line-height: 1.8;
  opacity: 0.8;
  font-weight: 300;
}
#modal-close {
  position: absolute;
  top: 20px; right: 20px;
  background: none;
  border: none;
  color: rgba(255,255,255,0.4);
  font-size: 22px;
  cursor: pointer;
  padding: 4px;
  transition: color var(--transition);
  line-height: 1;
}
#modal-close:hover { color: var(--blanco); }

/* ─── Footer ────────────────────────────────────────────── */

#footer {
  background: rgba(0,0,0,0.3);
  padding: 48px 0 40px;
  border-top: 1px solid var(--gris-borde);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-logo {
  height: 26px;
  width: auto;
  opacity: 0.55;
}
.footer-copy {
  font-size: 12px;
  opacity: 0.3;
  letter-spacing: 0.03em;
}
.footer-link {
  font-size: 12px;
  color: rgba(255,255,255,0.35);
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: color var(--transition);
}
.footer-link:hover { color: var(--grad-a); }

/* ─── Responsive ────────────────────────────────────────── */

@media (max-width: 900px) {
  .antecedentes-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .antecedentes-deco {
    position: static;
    display: flex;
    justify-content: center;
  }
  .deco-o { max-width: 180px; }

  .grabacion-card {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (max-width: 768px) {
  section { padding: 72px 0; }

  #nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(14, 22, 42, 0.97);
    backdrop-filter: blur(16px);
    padding: 20px;
    flex-direction: column;
    gap: 4px;
    border-bottom: 1px solid var(--gris-borde);
  }
  #nav-links.open { display: flex; }
  #nav-links a { padding: 12px 20px; border-radius: var(--radius); }

  #nav-burger { display: flex; }

  .hero-title { font-size: 2.2rem; }

  .programa-list::before { display: none; }
  .programa-item {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 22px 0;
  }
  .programa-item::before { display: none; }
  .programa-time {
    text-align: left;
    padding: 0;
    font-size: 12px;
  }

  .container { padding: 0 20px; }

  .speakers-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .presentaciones-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner { flex-direction: column; align-items: center; text-align: center; }
}

@media (max-width: 480px) {
  .speakers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .hero-meta { flex-direction: column; align-items: center; }
}