/*
 * Trapezoid Labs — Engine Shell
 * Sidebar + main + status bar layout. Replaces the legacy top-nav.
 */

/* ── Shell grid (sidebar | main / status bar) ── */
.tz-shell {
  display: grid;
  grid-template-columns: 220px 1fr;
  grid-template-rows: 1fr 24px;
  grid-template-areas:
    "sidebar main"
    "status  status";
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

.tz-shell__sidebar { grid-area: sidebar; }
.tz-shell__main    { grid-area: main; overflow: auto; padding: var(--space-4); }
.tz-shell__status  { grid-area: status; }

/* Auth variant (login etc.) — no sidebar */
.tz-shell--auth {
  grid-template-columns: 1fr;
  grid-template-areas:
    "main"
    "status";
}
.tz-shell--auth .tz-shell__sidebar { display: none; }

/* ── Sidebar ── */
.tz-sidebar {
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  height: 100%;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.tz-sidebar__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  text-decoration: none;
  border-bottom-width: 1px;
}
.tz-sidebar__brand:hover { color: var(--color-text); border-bottom-color: var(--color-border); }

.tz-sidebar__brand-mark {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
}

.tz-sidebar__nav {
  flex: 1;
  padding: 8px 0;
  overflow-y: auto;
}

.tz-sidebar__section {
  padding: 8px 12px 2px;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.tz-sidebar__item {
  display: block;
  padding: 4px 12px;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  border-left: 3px solid transparent;
  border-bottom: none;
  line-height: 1.6;
}
.tz-sidebar__item:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
  border-bottom: none;
}
.tz-sidebar__item.is-active {
  color: var(--color-text);
  background: var(--color-accent-bg);
  border-left-color: var(--color-accent);
}

.tz-sidebar__subitem {
  display: block;
  padding: 3px 12px 3px 28px;
  font-size: var(--text-sm);
  color: var(--color-text-subtle);
  text-decoration: none;
  border-left: 3px solid transparent;
  border-bottom: none;
  line-height: 1.5;
  position: relative;
}
.tz-sidebar__subitem::before {
  content: "·";
  position: absolute;
  left: 18px;
  color: var(--color-text-subtle);
}
.tz-sidebar__subitem:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
  border-bottom: none;
}
.tz-sidebar__subitem.is-active {
  color: var(--color-accent-hover);
  background: var(--color-accent-bg);
  border-left-color: var(--color-accent);
}

.tz-sidebar__footer {
  border-top: 1px solid var(--color-border);
  padding: 6px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.tz-sidebar__footer button {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: 0;
}
.tz-sidebar__footer button:hover { color: var(--color-accent-hover); }

/* ── Status bar ── */
.tz-statusbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 24px;
  padding: 0 12px;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  gap: 12px;
  white-space: nowrap;
  overflow: hidden;
}

.tz-statusbar__left  { justify-self: start; overflow: hidden; text-overflow: ellipsis; }
.tz-statusbar__center{ justify-self: center; color: var(--color-text-subtle); }
.tz-statusbar__right { justify-self: end; }

.tz-statusbar__sep { color: var(--color-text-subtle); margin: 0 6px; }

.tz-statusbar__env {
  display: inline-block;
  padding: 0 4px;
  margin-left: 6px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius);
  color: var(--color-text-muted);
  font-size: 0.625rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.tz-statusbar__env--prod { color: var(--color-warning); border-color: var(--color-warning); }

/* ── Page header (above content tables) ── */
.tz-page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.tz-page-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.tz-page-actions {
  display: flex;
  gap: 6px;
  align-items: center;
}

/* ── Section header (legacy alias used in some templates) ── */
.tz-section-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.tz-section-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

/* ── Auth (login screen) ── */
.tz-auth-center {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100%;
  padding: var(--space-8);
}

.tz-auth-card {
  width: 320px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4);
}

.tz-auth-card__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
  font-weight: 600;
  font-size: var(--text-base);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}