/* ---------- HEADER ---------- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: linear-gradient(135deg, var(--azul) 0%, #0050cc 100%);
  border-bottom: 1px solid rgba(0,0,0,0.15);
  box-shadow: 0 2px 20px rgba(0,56,168,0.35);
  height: 58px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
}
.header-escudo { color: var(--celeste); flex-shrink: 0; }
.header-titles { display: flex; flex-direction: column; line-height: 1.1; }
.header-titulo {
  font-family: var(--font-title);
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.header-sub {
  font-size: 0.6rem;
  color: rgba(192,216,240,0.75);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.header-nav { display: flex; gap: 3px; }
.nav-btn {
  padding: 6px 14px;
  font-size: 0.75rem;
  font-weight: 600;
  color: rgba(255,255,255,0.72);
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
}
.nav-btn:hover {
  color: #fff;
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.2);
}
.nav-btn.active {
  background: rgba(255,255,255,0.18);
  color: #fff;
  border-color: rgba(255,255,255,0.3);
}

.header-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 6px;
  border-radius: var(--radius-sm);
}
.header-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: #ffffff;
  border-radius: 1px;
  transition: var(--transition);
}

/* ── SEED COPY ── */
.seed-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: rgba(255,255,255,0.14);
  border: 1px solid rgba(255,255,255,0.28);
  border-radius: var(--radius-full);
  font-size: 0.65rem;
  font-weight: 600;
  color: rgba(255,255,255,0.88);
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.05em;
  white-space: nowrap;
}
.seed-copy-btn:hover {
  background: rgba(255,255,255,0.28);
  color: #fff;
}
.seed-copy-btn.copied {
  background: var(--green);
  border-color: var(--green);
  color: white;
}

/* ── MAIN ── */
.main {
  padding-top: 58px;
  min-height: 100vh;
}

/* ── PAGES ── */
.page { display: none; animation: fadeIn 0.3s ease; }
.page.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }

.page-header {
  text-align: center;
  padding: 32px 20px 20px;
  max-width: 800px;
  margin: 0 auto 24px;
}
.page-header::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--azul), var(--celeste));
  border-radius: var(--radius-full);
  margin: 12px auto 0;
}
.page-titulo {
  font-family: var(--font-title);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--black);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  line-height: 1;
}
.page-sub {
  color: var(--text-dim);
  margin-top: 6px;
  font-size: 0.85rem;
}

/* ── LOADING ── */
.loading-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(238,243,250,0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 300;
  align-items: center;
  justify-content: center;
}
body.dark .loading-overlay { background: rgba(8,13,24,0.88); }
.loading-overlay.active { display: flex; }
.loading-content { text-align: center; }
.loading-spinner {
  width: 44px; height: 44px;
  border: 3px solid var(--bg-secondary);
  border-top-color: var(--azul);
  border-right-color: var(--celeste);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 0 auto 14px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text { font-size: 0.85rem; color: var(--text-dim); font-weight: 600; }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .cancha-layout { grid-template-columns: 1fr; }
  .cancha-left {
    border-right: none;
    border-bottom: 1px solid rgba(0,0,0,0.1);
    flex-direction: row;
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px;
  }
  .cancha-right { border-left: none; border-top: 1px solid rgba(0,0,0,0.1); }
  .formacion-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 768px) {
  .header-nav { display: none; }
  .header-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 58px; left: 0; right: 0;
    background: var(--bg-surface);
    border-bottom: 1px solid rgba(0,0,0,0.08);
    box-shadow: var(--shadow-lg);
    padding: 8px;
    gap: 2px;
  }
  .header-nav.open .nav-btn {
    padding: 12px 16px;
    font-size: 0.85rem;
    color: var(--text);
    border-radius: var(--radius-sm);
    border-bottom: none;
  }
  .header-nav.open .nav-btn.active {
    background: linear-gradient(135deg, var(--azul), #0050cc);
    color: #fff;
  }
  .header-toggle { display: flex; }

  .hero-titulo { font-size: clamp(2rem, 10vw, 3rem); }
  .hero-stats { gap: 20px; }
  .hero-stat-num { font-size: 1.4rem; }

  .sorteo-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 8px; padding: 0 12px 24px; }
  .team-card { padding: 10px; }
  .team-card-name { font-size: 0.8rem; }

  .grupos-container { grid-template-columns: 1fr; }
  .tabla-grupo { font-size: 0.7rem; }
  .tabla-grupo th, .tabla-grupo td { padding: 5px 6px; }

  .page-titulo { font-size: 1.6rem; }
  .campana-titulo { font-size: 2rem; }

  .bracket-matches { max-width: 100%; }
  .bracket-team { font-size: 0.7rem; }
  .bracket-score { font-size: 0.95rem; min-width: 36px; }

  .campeon-equipo { font-size: 1.8rem; }
  .resumen-score { font-size: 3.5rem; }
  .resumen-final { flex-direction: column; padding: 16px; border-radius: var(--radius-lg); }
}

@media (max-width: 480px) {
  .header-inner { padding: 0 12px; }
  .sorteo-grid { grid-template-columns: repeat(2, 1fr); gap: 6px; }
  .team-card-name { font-size: 0.7rem; }
  .team-card-year { font-size: 0.6rem; }
  .grupos-controls { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; }
  .armar-grid { grid-template-columns: 1fr 1fr; }
  .formacion-grid { grid-template-columns: repeat(3, 1fr); }
}