/* A0DASH — Layout
 * Grid system, containers, views, responsive.
 */

/* ── Command Bar ── */

.command-bar {
  position: sticky;
  top: 0;
  z-index: var(--z-command);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--command-h);
  padding: 0 var(--space-xl);
  background: var(--bg-command);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  font-size: var(--fs-small);
}

.command-bar__left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.command-bar__center {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.command-bar__right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* ── Tab Navigation ── */

.tab-nav {
  display: flex;
  align-items: center;
  gap: 0;
  padding: 0 var(--space-lg);
  background: transparent;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.tab-nav__btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: var(--fs-small);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  position: relative;
  transition: color var(--t-fast);
}

.tab-nav__btn:hover {
  color: var(--text);
}

.tab-nav__btn--active {
  color: var(--cyan);
}

.tab-nav__btn--active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: var(--space-lg);
  right: var(--space-lg);
  height: 1px;
  background: var(--cyan);
  box-shadow: var(--glow-cyan);
}

.tab-nav__hint {
  font-size: var(--fs-micro);
  color: var(--text-dim);
  margin-left: var(--space-xs);
}

.tab-nav__sys {
  margin-left: auto;
}

/* ── Main Content ── */

.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-lg);
}

/* ── Views ── */

.view {
  display: none;
}

.view--active {
  display: block;
  animation: view-enter var(--t-normal) var(--ease-out);
}

@keyframes view-enter {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Card Grid ── */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(var(--card-min-w), 1fr));
  gap: var(--card-gap);
}

.card-grid__full {
  grid-column: 1 / -1;
}

.card-grid__half {
  grid-column: span 1;
}

/* ── Footer ── */

.footer {
  text-align: center;
  padding: var(--space-lg);
  font-size: var(--fs-small);
  color: var(--text-dim);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  border-top: 1px solid var(--border);
  margin-top: var(--space-3xl);
}

/* ── Responsive ── */

@media (max-width: 768px) {
  .command-bar__center {
    display: none;
  }

  .main {
    padding: var(--space-sm);
  }

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

  .tab-nav {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .tab-nav__hint {
    display: none;
  }
}

@media (max-width: 480px) {
  :root {
    --fs-hero: 24px;
    --card-padding: var(--space-lg);
    --command-h: 32px;
  }

  body {
    background-image: none; /* disable grid on small screens */
  }
}