/*
 * nav.css  —  Glassmorphism Navigation
 */

#main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  background: rgba(8, 13, 30, 0.65);
  backdrop-filter: blur(28px) saturate(1.8);
  -webkit-backdrop-filter: blur(28px) saturate(1.8);
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 20px;
  z-index: 1000;
  transition: background var(--t-base) var(--ease-smooth);
}

/* Top shimmer line */
#main-nav::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(56,189,248,0.4) 30%,
    rgba(167,139,250,0.4) 60%,
    rgba(45,212,191,0.4) 85%,
    transparent 100%
  );
  animation: nav-shimmer 4s ease-in-out infinite;
}

@keyframes nav-shimmer {
  0%, 100% { opacity: 0.5; }
  50%       { opacity: 1; }
}

/* ── Logo ──────────────────────────────── */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}

.nav-logo-icon {
  width: 32px; height: 32px;
  background: var(--glass-3);
  border: 1px solid var(--glass-border-2);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--t-base) var(--ease-out);
}

.nav-logo:hover .nav-logo-icon {
  background: var(--glass-4);
  border-color: rgba(56,189,248,0.4);
  box-shadow: 0 0 16px rgba(56,189,248,0.2), inset 0 0 16px rgba(56,189,248,0.05);
  transform: rotate(5deg) scale(1.05);
}

.nav-logo-text {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  user-select: none;
}

.nav-logo-text span {
  color: var(--accent-cyan);
}

/* ── Tab strip ─────────────────────────── */
.nav-tabs {
  display: flex;
  align-items: center;
  gap: 3px;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0 4px;
}
.nav-tabs::-webkit-scrollbar { display: none; }

.nav-tab {
  position: relative;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 7px 14px;
  border-radius: var(--r-sm);
  cursor: pointer;
  white-space: nowrap;
  outline: none;
  transition: color var(--t-base) var(--ease-smooth),
              background var(--t-base) var(--ease-smooth),
              transform var(--t-fast) var(--ease-out);
}

.nav-tab:hover {
  color: var(--text-secondary);
  background: var(--glass-2);
  transform: translateY(-1px);
}

.nav-tab.active {
  color: var(--accent-cyan);
  background: rgba(56,189,248,0.08);
  border: 1px solid rgba(56,189,248,0.18);
}

/* Glow dot under active tab */
.nav-tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--accent-cyan);
  border-radius: 2px 2px 0 0;
  box-shadow: 0 0 8px var(--accent-cyan), 0 0 16px rgba(56,189,248,0.4);
  animation: tab-glow 2s ease-in-out infinite;
}

@keyframes tab-glow {
  0%, 100% { box-shadow: 0 0 8px var(--accent-cyan), 0 0 16px rgba(56,189,248,0.4); }
  50%       { box-shadow: 0 0 14px var(--accent-cyan), 0 0 28px rgba(56,189,248,0.6); }
}

/* ── Status indicator ──────────────────── */
.nav-status {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  padding: 6px 14px;
  background: var(--glass-1);
  border: 1px solid var(--glass-border);
  border-radius: 40px;
  backdrop-filter: blur(12px);
  transition: all var(--t-base) var(--ease-smooth);
}

.nav-status:hover {
  border-color: var(--glass-border-2);
  background: var(--glass-2);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-dot.live {
  background: var(--accent-emerald);
  box-shadow: 0 0 0 0 rgba(52,211,153,0.7);
  animation: pulse-live 2s ease-in-out infinite;
}

.status-dot.loading {
  background: var(--accent-amber);
  box-shadow: 0 0 6px var(--accent-amber);
  animation: pulse-live 0.8s ease-in-out infinite;
}

.status-dot.error {
  background: var(--accent-rose);
  box-shadow: 0 0 8px var(--accent-rose);
}

@keyframes pulse-live {
  0%   { box-shadow: 0 0 0 0   rgba(52,211,153,0.7); }
  70%  { box-shadow: 0 0 0 7px rgba(52,211,153,0);   }
  100% { box-shadow: 0 0 0 0   rgba(52,211,153,0);   }
}

.status-label {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  user-select: none;
}