/* ==========================================================================
   layout.css — app shell, app bar, tabs, contract workspace, archive drawer
   Layer 3 of 5. Breakpoints: 1024 (lg) · 768 (md) · 560 (sm) · 420 (xs)
   ========================================================================== */

.wrap {
  width: min(var(--app-max), 100%);
  margin: 0 auto;
  min-height: 100vh;
  min-height: 100dvh;
  padding: var(--space-5) var(--space-5) var(--space-7);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

/* --- App bar ------------------------------------------------------------- */
header.app-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  padding: var(--space-4) var(--space-5);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
}

.app-bar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-width: 0;
}

header.app-bar h1 {
  font-size: var(--text-lg);
}

header.app-bar p {
  margin-top: 0.15rem;
  color: var(--muted);
  font-size: var(--text-xs);
}

.app-bar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* --- Tabs ---------------------------------------------------------------- */
.app-tabs {
  display: flex;
  gap: var(--space-1);
  padding: 0.2rem;
  background: var(--surface-sunken);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.tab-btn {
  font: inherit;
  font-size: var(--text-sm);
  font-weight: 600;
  min-height: 2.25rem;
  padding: 0.35rem 1rem;
  color: var(--muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition:
    background var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.tab-btn:hover {
  color: var(--ink);
  background: var(--surface);
}

.tab-btn.is-active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--on-primary);
}

.tab-panels,
.tab-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  min-width: 0;
}

.tab-panel {
  display: none;
}

.tab-panel.is-active {
  display: flex;
}

/* --- Contract workspace (single column; archive lives in a drawer) ------- */
.contract-workspace {
  position: relative;
  display: block;
  width: 100%;
  min-width: 0;
}

.contract-main {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  width: 100%;
  max-width: var(--contract-max);
  min-width: 0;
  margin-inline: auto;
}

.archive-count {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--muted);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

/* --- ≤768px: phone ------------------------------------------------------- */
@media (max-width: 768px) {
  .wrap {
    width: 100%;
    gap: var(--space-4);
    padding-top: max(var(--space-4), env(safe-area-inset-top, 0px));
    padding-right: max(var(--space-4), env(safe-area-inset-right, 0px));
    padding-bottom: max(var(--space-6), env(safe-area-inset-bottom, 0px));
    padding-left: max(var(--space-4), env(safe-area-inset-left, 0px));
  }

  header.app-bar {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-4);
    padding: var(--space-4);
  }

  header.app-bar h1 {
    font-size: var(--text-md);
  }

  /* App bar actions stay on one line: tabs stretch, logout keeps its width. */
  .app-bar-actions {
    width: 100%;
    flex-wrap: nowrap;
    gap: var(--space-2);
  }

  .app-tabs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    flex: 1 1 auto;
    min-width: 0;
    gap: 0.2rem;
  }

  .tab-btn {
    width: 100%;
    min-height: var(--tap-min);
    padding: 0.4rem 0.25rem;
    font-size: var(--text-xs);
  }

  #logoutBtn {
    flex: 0 0 auto;
    min-width: 3.5rem;
    padding: 0.45rem 0.6rem;
    white-space: nowrap;
  }

  .contract-main,
  .contract-workspace,
  .tab-panel,
  .tab-panels {
    min-width: 0;
    max-width: 100%;
  }
}

/* --- ≤560px: small phone ------------------------------------------------- */
@media (max-width: 560px) {
  header.app-bar p {
    display: none;
  }
}