:root {
  --bg-top: #020a20;
  --bg-bot: #051232;
  --cyan: #5bc0ff;
  --text: #f0f4fa;
  --muted: #8aa0c0;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bot) 100%);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.tabbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 30px;
  background: rgba(2, 10, 32, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(91, 192, 255, 0.08);
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 400;
  font-size: 16px;
  letter-spacing: 0.04em;
}
.brand-meta {
  color: rgba(255, 255, 255, 0.4);
  font-weight: 400;
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.tabs { display: flex; gap: 4px; }
.tab {
  position: relative;
  padding: 8px 15px;
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--muted);
  text-decoration: none;
  border-radius: 6px;
  transition: color 0.2s ease, background 0.2s ease;
}
.tab:hover { color: var(--text); background: rgba(91, 192, 255, 0.06); }
.tab[aria-current="page"] { color: var(--text); }
.tab[aria-current="page"]::after {
  content: '';
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: -16px;
  height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}

.placeholder {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
  text-align: center;
}
.placeholder .label {
  font-size: 10px;
  color: var(--cyan);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.placeholder h1 {
  font-size: 28px;
  font-weight: 200;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  color: var(--text);
  position: relative;
}
.placeholder h1::after {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-left: 10px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 18px var(--cyan);
  animation: pulse 1.6s ease-in-out infinite;
  vertical-align: middle;
}
.placeholder .sub {
  color: var(--muted);
  max-width: 440px;
  font-size: 13px;
  font-weight: 300;
  line-height: 1.6;
}
.bars {
  display: flex;
  gap: 6px;
  margin-top: 36px;
}
.bars i {
  display: block;
  width: 3px;
  height: 28px;
  background: var(--cyan);
  border-radius: 2px;
  opacity: 0.4;
  animation: bar 1.4s ease-in-out infinite;
}
.bars i:nth-child(1) { animation-delay: 0s; }
.bars i:nth-child(2) { animation-delay: 0.15s; }
.bars i:nth-child(3) { animation-delay: 0.3s; }
.bars i:nth-child(4) { animation-delay: 0.45s; }
.bars i:nth-child(5) { animation-delay: 0.6s; }

@keyframes pulse {
  0%, 100% { opacity: 0.4; transform: scale(0.9); }
  50%      { opacity: 1; transform: scale(1.15); }
}
@keyframes bar {
  0%, 100% { transform: scaleY(0.4); opacity: 0.3; }
  50%      { transform: scaleY(1.2); opacity: 1; }
}

footer {
  padding: 20px 30px;
  border-top: 1px solid rgba(91, 192, 255, 0.06);
  text-align: center;
  color: rgba(240, 244, 250, 0.4);
  font-size: 10px;
  font-weight: 300;
  letter-spacing: 0.06em;
}

@media (max-width: 720px) {
  .tabbar { padding: 12px 18px; flex-wrap: wrap; gap: 12px; }
  .tabs { width: 100%; overflow-x: auto; }
}