/* ============================================================
   App Chrome — sidebar, topbar, bottom nav, FAB, layout shell
   ============================================================ */

/* ---- Layout shell ---- */
.app-frame {
  display: flex;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
}

.app-sidebar {
  width: var(--sidebar-w);
  flex: 0 0 var(--sidebar-w);
  background: var(--surface);
  border-right: var(--border-w) solid var(--border);
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
  padding: var(--sp-6) var(--sp-4);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 30;
}

.app-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.app-content {
  flex: 1;
  display: flex;
  gap: 0;
  min-height: 0;
}

.app-column {
  flex: 1;
  min-width: 0;
  padding: 40px 46px 80px;
}

.app-rail {
  width: var(--rail-w);
  flex: 0 0 var(--rail-w);
  border-left: var(--border-w) solid var(--border);
  padding: 40px 28px 80px;
  display: flex;
  flex-direction: column;
  gap: var(--sp-8);
  overflow-y: auto;
}

/* ---- Sidebar internals ---- */
.sidebar-brand {
  padding: 0 8px;
}

.sidebar-brand-name {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.01em;
  line-height: 1;
  display: block;
}

.sidebar-brand-domain {
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-top: 6px;
  display: block;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  font-family: var(--font-ui);
  font-size: var(--fs-ui);
  font-weight: 400;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.sidebar-nav-item:hover {
  color: var(--text);
}

.sidebar-nav-item.active {
  color: var(--ink);
  font-weight: 600;
  background: var(--paper-raised);
  box-shadow: var(--shadow-sm);
}

.sidebar-nav-item .nav-icon {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.7;
}

.sidebar-nav-item.active .nav-icon {
  opacity: 1;
}

.sidebar-footer {
  margin-top: auto;
}

/* ---- Bottom nav (mobile/iPad) ---- */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface);
  border-top: var(--border-w) solid var(--border);
  z-index: 40;
  padding: 0 var(--sp-4) env(safe-area-inset-bottom);
}

.bottom-nav-items {
  display: flex;
  justify-content: space-around;
  padding: var(--sp-2) 0 var(--sp-1);
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: var(--sp-2) var(--sp-4);
  font-family: var(--font-ui);
  font-size: 10px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-faint);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
  border: none;
  background: none;
  cursor: pointer;
}

.bottom-nav-item.active,
.bottom-nav-item:hover {
  color: var(--text);
}

.bottom-nav-item svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---- Mobile overlay sidebar ---- */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(26, 23, 18, 0.3);
  z-index: 29;
}

/* ---- Floating Capture FAB ---- */
.fab-container {
  position: fixed;
  right: 26px;
  bottom: 26px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
  z-index: 50;
}

.fab-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-fab);
  transition: transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
  flex: 0 0 auto;
}

.fab-btn:hover {
  background: var(--ink-2);
}

.fab-btn svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform var(--dur) var(--ease);
}

.fab-btn.open svg {
  transform: rotate(45deg);
}

.fab-options {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 11px;
}

.fab-option {
  display: flex;
  align-items: center;
  gap: 11px;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: var(--font-ui);
}

.fab-option-label {
  font-size: 12px;
  letter-spacing: 0.03em;
  background: var(--surface);
  border: var(--border-w) solid var(--border);
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  color: var(--text);
  box-shadow: 0 3px 10px rgba(26, 23, 18, 0.12);
}

.fab-option-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--surface);
  border: var(--border-w) solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  box-shadow: 0 3px 12px rgba(26, 23, 18, 0.14);
  font-size: 18px;
  line-height: 1;
}

/* Hide inline rail on desktop (shown only on narrow via media query below) */
.app-rail-inline {
  display: none;
}

/* ---- Responsive breakpoints ---- */
@media (max-width: 1239px) {
  .app-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    transform: translateX(-100%);
    transition: transform var(--dur) var(--ease);
    z-index: 30;
  }

  .app-sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay.open {
    display: block;
  }

  .bottom-nav {
    display: block;
  }

  .app-column {
    padding: 24px 24px 100px;
  }

  .app-rail {
    display: none;
  }

  .app-rail-inline {
    display: block;
    padding: 0 24px 24px;
  }

  .fab-container {
    bottom: calc(72px + env(safe-area-inset-bottom));
  }
}

@media (max-width: 767px) {
  .app-column {
    padding: 20px 16px 100px;
  }
}

/* ---- Section label helpers ---- */
.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 12px;
}

.section-header + hr.op-rule {
  margin-bottom: var(--sp-6);
}