/*
 * static/css/layout.css
 * Page-level layout: header, main grid, panels.
 */

/* ── Page structure ─────────────────────────────────────────────────────── */

.page-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-void);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 var(--space-6);
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  backdrop-filter: blur(12px);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-brand-name {
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.header-brand-name span {
  color: var(--cyan);
}

.header-indicators {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

/* ── Main layout ────────────────────────────────────────────────────────── */

.page-main {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-8) var(--space-6) var(--space-12);
  display: grid;
  grid-template-columns: 1fr 320px;
  grid-template-rows: auto;
  gap: var(--space-6);
  grid-template-areas:
    "composer   sidebar"
    "queue      sidebar"
    "history    sidebar";
}

.area-composer { grid-area: composer; }
.area-queue    { grid-area: queue; }
.area-history  { grid-area: history; }
.area-sidebar  { grid-area: sidebar; display: flex; flex-direction: column; gap: var(--space-4); }

/* ── Panel container ─────────────────────────────────────────────────────── */

.panel {
  background: var(--bg-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.panel-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.panel-title {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.panel-body {
  padding: var(--space-5);
}

.panel-body--flush {
  padding: 0;
}

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

@media (max-width: 900px) {
  .page-main {
    grid-template-columns: 1fr;
    grid-template-areas:
      "sidebar"
      "composer"
      "queue"
      "history";
  }

  .area-sidebar {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-4);
  }

  .area-sidebar > .panel {
    flex: 1 1 260px;
  }
}

@media (max-width: 560px) {
  .page-header { padding: 0 var(--space-4); }
  .page-main   { padding: var(--space-5) var(--space-4) var(--space-10); gap: var(--space-4); }
}