/* ==========================================================================
   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 -------------------------------------------------------------
   Breakpoints:
     desktop   : min-width 1025              → LOCKED
     tablet    : 769–1024                    → LOCKED
     mobile    : max-width 768               → editable next
     mobile-sm : max-width 560
   Tune via --app-bar-* on header.app-bar inside each band.
   -------------------------------------------------------------------------- */

/* Shared structure (all viewports) */
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(--app-bar-brand-gap, var(--space-4));
  min-width: 0;
  flex: 1 1 auto;
}

.app-bar-brand .titles {
  min-width: 0;
  flex: 1 1 auto;
}

.app-bar-title-row {
  display: flex;
  align-items: center;
  gap: var(--app-bar-title-gap, var(--space-2));
  min-width: 0;
  max-width: 100%;
}

header.app-bar h1 {
  margin: 0;
  flex: 0 1 auto;
  min-width: 0;
  font-size: var(--app-bar-title-size, var(--text-lg));
  font-weight: var(--app-bar-title-weight, 700);
  line-height: 1.25;
}

header.app-bar .current-user-badge {
  flex: 0 1 auto;
  min-width: 0;
  max-width: var(--app-bar-badge-max, 16rem);
  padding: var(--app-bar-badge-pad-y, 0.2rem) var(--app-bar-badge-pad-x, 0.6rem);
  font-size: var(--app-bar-badge-size, var(--text-sm));
  font-weight: var(--app-bar-badge-weight, 700);
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

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

/* Mobile menu trigger — hidden until ≤768 */
.app-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  min-width: var(--tap-min);
  min-height: var(--tap-min);
  padding-inline: var(--space-2);
}

.app-menu-icon {
  display: block;
  width: 1.15rem;
  height: 0.85rem;
  background:
    linear-gradient(currentColor, currentColor) 0 0 / 100% 2px no-repeat,
    linear-gradient(currentColor, currentColor) 0 50% / 100% 2px no-repeat,
    linear-gradient(currentColor, currentColor) 0 100% / 100% 2px no-repeat;
}

/* Off-canvas app nav (mobile) */
.app-nav-canvas {
  position: fixed;
  inset: 0;
  z-index: var(--z-drawer);
  pointer-events: none;
}

.app-nav-canvas:not([hidden]) {
  pointer-events: auto;
}

.app-nav-scrim {
  position: absolute;
  inset: 0;
  background: var(--scrim);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.app-nav-panel {
  position: absolute;
  inset-block: 0;
  inset-inline-end: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  width: min(var(--drawer-width), 88vw);
  max-width: 100%;
  padding: var(--space-4);
  padding-top: max(var(--space-4), env(safe-area-inset-top, 0px));
  padding-bottom: max(var(--space-4), env(safe-area-inset-bottom, 0px));
  background: var(--surface);
  border-inline-start: 1px solid var(--line);
  box-shadow: var(--shadow-3);
  transform: translateX(100%);
  transition: transform var(--dur) var(--ease);
}

[dir="rtl"] .app-nav-panel {
  transform: translateX(-100%);
}

.app-nav-canvas.is-open .app-nav-scrim {
  opacity: 1;
}

.app-nav-canvas.is-open .app-nav-panel {
  transform: translateX(0);
}

.app-nav-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.app-nav-panel-head h2 {
  margin: 0;
  font-size: var(--text-md);
}

.app-nav-panel-tabs {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex: 1 1 auto;
  min-height: 0;
}

.app-nav-panel-tabs .tab-btn {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: var(--tap-min);
  justify-content: flex-start;
  text-align: start;
  padding-inline: var(--space-4);
  font-size: var(--text-md);
}

.app-nav-footer {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: auto;
  min-width: 0;
}

.app-nav-appearance {
  flex: 1 1 auto;
  min-width: 0;
}

.app-nav-appearance-toggle {
  width: 100%;
}

.app-nav-appearance-toggle .seg-btn {
  flex: 1 1 0;
  min-height: 2.1rem;
  padding: 0.25rem 0.5rem;
  font-size: var(--text-xs);
}

.app-nav-logout {
  flex: 0 0 auto;
  width: auto;
  min-height: 2.1rem;
  padding-inline: var(--space-3);
  font-size: var(--text-sm);
  white-space: nowrap;
}

body.is-app-nav-open {
  overflow: hidden;
}

/* ========== DESKTOP LOCKED (≥1025px) — approved; do not edit casually ========== */
@media (min-width: 1025px) {
  header.app-bar {
    --app-bar-title-size: var(--text-lg);
    --app-bar-title-weight: 700;
    --app-bar-sub-size: var(--text-xs);
    --app-bar-badge-size: var(--text-sm);
    --app-bar-badge-weight: 700;
    --app-bar-badge-max: 16rem;
    --app-bar-badge-pad-y: 0.2rem;
    --app-bar-badge-pad-x: 0.6rem;
    --app-bar-title-gap: var(--space-2);
    --app-bar-brand-gap: var(--space-4);
    --app-bar-sub-display: block;
  }

  .app-bar-title-row {
    flex-wrap: nowrap;
  }

  header.app-bar h1 {
    white-space: nowrap;
  }
}

/* --- 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 — shell + app bar
   ========================================================================== */

/* ========== TABLET LOCKED (≤1024 overlaps phone; app-bar band approved) ========== */
@media (max-width: 1024px) {
  header.app-bar {
    --app-bar-title-size: var(--text-md);
    --app-bar-title-weight: 700;
    --app-bar-sub-size: var(--text-xs);
    --app-bar-badge-size: var(--text-xs);
    --app-bar-badge-weight: 700;
    --app-bar-badge-max: 12rem;
    --app-bar-badge-pad-y: 0.2rem;
    --app-bar-badge-pad-x: 0.55rem;
    --app-bar-title-gap: var(--space-2);
    --app-bar-brand-gap: var(--space-3);
    --app-bar-sub-display: block;
  }

  .app-bar-title-row {
    flex-wrap: wrap;
  }

  header.app-bar h1 {
    white-space: nowrap;
  }
}

/* ========== MOBILE (≤768) — edit here next ========== */
@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 {
    --app-bar-title-size: var(--text-md);
    --app-bar-badge-size: var(--text-xs);
    --app-bar-badge-max: 100%;
    --app-bar-badge-pad-y: 0.15rem;
    --app-bar-badge-pad-x: 0.5rem;
    --app-bar-title-gap: var(--space-1);
    --app-bar-brand-gap: var(--space-3);

    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
  }

  .app-bar-brand {
    flex: 1 1 auto;
    min-width: 0;
  }

  .app-bar-title-row {
    flex-wrap: wrap;
    width: 100%;
  }

  header.app-bar h1 {
    white-space: normal;
  }

  .app-menu-btn {
    display: inline-flex;
  }

  /* Tabs + logout live in the off-canvas menu on phone */
  .app-bar-actions {
    display: none;
  }

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

/* --- Small phone: ≤560 --------------------------------------------------- */
@media (max-width: 560px) {
  header.app-bar {
    --app-bar-title-size: var(--text-sm);
    --app-bar-badge-size: 0.7rem;
    --app-bar-badge-max: 100%;
    --app-bar-sub-display: none;
    --app-bar-title-gap: 0.35rem;
  }

  .app-bar-title-row {
    flex-direction: column;
    align-items: flex-start;
  }

  header.app-bar .current-user-badge {
    max-width: 100%;
  }
}