/* ════════════════════════════════════════════════════════════
   Life OS — Sidebar Navigation
   ────────────────────────────────────────────────────────────
   Replaces the prior 16-tab top nav. See DESIGN.md §5.

   Three states (controlled by body classes added by op-sidebar.js):
     (default)              → full   232px desktop
     body.op-rail           → rail    60px desktop
     body.op-drawer-open    → mobile drawer slid in
   ════════════════════════════════════════════════════════════ */

:root {
  --op-sidebar-w:    232px;
  --op-sidebar-rail: 60px;
  --op-chrome-h:     44px;
  --op-mobile-bp:    768px;
}

/* ──────── Body adjustment for fixed sidebar ──────── */
body.op-with-sidebar {
  padding-left: var(--op-sidebar-w);
  transition: padding-left 220ms var(--ease);
}

body.op-with-sidebar.op-rail {
  padding-left: var(--op-sidebar-rail);
}

/* ════════════════════════════════════════════════════════════
   SIDEBAR
   ════════════════════════════════════════════════════════════ */
.op-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--op-sidebar-w);
  background: var(--bg-elevated);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 18px 0 14px;
  z-index: var(--z-sidebar);
  overflow: hidden;
  transition: width 220ms var(--ease), transform 240ms var(--ease);
}

body.op-rail .op-sidebar {
  width: var(--op-sidebar-rail);
}

/* ──────── Brand block ──────── */
.op-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 14px 18px 18px;
  margin-bottom: 6px;
  white-space: nowrap;
  flex-shrink: 0;
  border-radius: 0;
  transition: background 120ms var(--ease);
}

.op-brand:hover { background: rgba(255, 255, 255, 0.02); }

.op-brand-toggle {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  width: 24px;
  height: 24px;
  border-radius: 4px;
  display: grid;
  place-items: center;
  transition: all 120ms var(--ease);
  flex-shrink: 0;
}

.op-brand-toggle:hover {
  color: var(--text);
  background: var(--hover);
}

.op-brand-toggle svg {
  width: 12px;
  height: 12px;
  transition: transform 220ms var(--ease);
}

body.op-rail .op-brand-toggle svg {
  transform: rotate(180deg);
}

body.op-rail .op-brand-toggle {
  /* Hide explicit toggle in rail state — clicking anywhere on the brand still toggles. */
  opacity: 0;
  pointer-events: none;
}

.op-brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  display: grid;
  place-items: center;
  flex-shrink: 0;
  box-shadow: 0 0 0 1px var(--accent-line), inset 0 1px 0 rgba(255, 255, 255, 0.10);
}
.op-brand-mark svg { width: 14px; height: 14px; color: var(--on-accent); }

.op-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  overflow: hidden;
  transition: opacity 160ms var(--ease);
}

body.op-rail .op-brand-text { opacity: 0; pointer-events: none; }

.op-brand-name {
  font-weight: 600;
  font-size: 13px;
  letter-spacing: -0.015em;
  color: var(--text);
}

:root[data-theme="almanac-terracotta"] .op-brand-name {
  font-family: var(--serif);
  font-weight: 500;
  font-style: italic;
  font-size: 17px;
  color: var(--accent-deep);
  letter-spacing: -0.018em;
}

.op-brand-sub {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-muted);
}

/* ──────── Sidebar scrolling area ──────── */
.op-side-scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding-bottom: 8px;
}

/* ──────── Sections ──────── */
.op-side-section { padding: 10px 0 2px; }

.op-side-section-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding: 0 18px 6px;
  white-space: nowrap;
  transition: opacity 160ms var(--ease), height 160ms var(--ease), padding 160ms var(--ease);
}

body.op-rail .op-side-section-label {
  opacity: 0;
  height: 0;
  padding: 0;
  margin: 0;
  overflow: hidden;
}

/* ──────── Nav items ──────── */
.op-side-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px 6px 14px;
  margin: 0 8px 1px;
  color: var(--text-soft);
  text-decoration: none;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 400;
  transition: background 120ms var(--ease), color 120ms var(--ease);
  position: relative;
  white-space: nowrap;
  overflow: hidden;
}

.op-side-item:hover {
  background: var(--hover);
  color: var(--text);
}

.op-side-item.active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 500;
}

.op-side-item.active::before {
  content: '';
  position: absolute;
  left: -8px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
}

:root[data-theme="almanac-terracotta"] .op-side-item.active {
  color: var(--accent-deep);
}

.op-side-item .op-side-icon {
  width: 14px;
  height: 14px;
  opacity: 0.65;
  flex-shrink: 0;
}

.op-side-item.active .op-side-icon { opacity: 1; }

.op-side-item .op-side-label {
  transition: opacity 160ms var(--ease);
  flex: 1;
}

body.op-rail .op-side-item .op-side-label { opacity: 0; }
body.op-rail .op-side-item .op-side-badge { opacity: 0; }
body.op-rail .op-side-item { padding: 6px 14px; }
body.op-rail .op-side-item.active::before { left: 0; }

.op-side-item .op-side-badge {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 1px 6px;
  border-radius: var(--radius-pill);
  font-weight: 500;
  transition: opacity 160ms var(--ease);
}

/* ──────── Footer ──────── */
.op-side-foot {
  margin-top: auto;
  padding: 12px 16px 0;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-shrink: 0;
}

body.op-rail .op-side-foot { padding: 12px 8px 0; }

/* Token-budget card */
.op-token-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: opacity 160ms var(--ease), height 160ms var(--ease), padding 160ms var(--ease);
}

body.op-rail .op-token-card {
  opacity: 0;
  height: 0;
  padding: 0;
  border: none;
  margin: 0;
  overflow: hidden;
}

.op-token-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 11px;
}

.op-token-row .label {
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.op-token-row .used { color: var(--text); font-weight: 500; }
.op-token-row .total { color: var(--text-faint); }

.op-token-card.tier-warn .used { color: var(--warn); }
.op-token-card.tier-alert .used,
.op-token-card.tier-critical .used { color: var(--danger); }

.op-token-bar {
  height: 3px;
  background: var(--bg);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.op-token-bar > span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-deep));
  border-radius: var(--radius-pill);
  transition: width 240ms var(--ease);
}

.op-token-card.tier-warn .op-token-bar > span {
  background: var(--warn);
}
.op-token-card.tier-alert .op-token-bar > span,
.op-token-card.tier-critical .op-token-bar > span {
  background: var(--danger);
}

.op-token-card { cursor: pointer; }

/* ──────── Foot row of buttons ──────── */
.op-foot-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.op-icon-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 30px;
  height: 30px;
  border-radius: var(--radius);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all 120ms var(--ease);
  flex-shrink: 0;
  position: relative;
}

.op-icon-btn:hover {
  color: var(--text);
  border-color: var(--border-hover);
  background: var(--hover);
}

.op-icon-btn svg { width: 14px; height: 14px; }

.op-foot-spacer { flex: 1; }

body.op-rail .op-foot-row { flex-direction: column; }

/* Theme icon swap (sun in dark, moon in light) */
.op-theme-icon-sun,
.op-theme-icon-moon {
  position: absolute;
  inset: 0;
  margin: auto;
  width: 14px;
  height: 14px;
}
[data-theme-mode="dark"] .op-theme-icon-moon { display: none; }
[data-theme-mode="light"] .op-theme-icon-sun { display: none; }

/* ════════════════════════════════════════════════════════════
   CHROME BAR — mobile-only (hamburger to open drawer).
   On desktop, the sidebar's brand is the toggle target — no
   need for a separate chrome bar eating vertical space.
   ════════════════════════════════════════════════════════════ */
.op-chrome {
  display: none; /* desktop hidden; mobile shows it via media query below */
  position: sticky;
  top: 0;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  height: var(--op-chrome-h);
  background: color-mix(in srgb, var(--bg) 95%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-soft);
  z-index: 30;
}

.op-chrome-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 28px;
  height: 28px;
  border-radius: var(--radius);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all 120ms var(--ease);
  flex-shrink: 0;
}

.op-chrome-toggle:hover {
  color: var(--text);
  border-color: var(--border-hover);
  background: var(--hover);
}

.op-chrome-toggle svg {
  width: 14px;
  height: 14px;
  transition: transform 220ms var(--ease);
}

body.op-rail .op-chrome-collapse svg {
  transform: rotate(180deg);
}

.op-chrome-mobile { display: none; }

.op-chrome-spacer { flex: 1; }

/* Optional page-title slot */
.op-chrome-title {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: -0.005em;
}

/* ════════════════════════════════════════════════════════════
   SCRIM — for mobile drawer backdrop
   ════════════════════════════════════════════════════════════ */
.op-scrim {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms var(--ease);
  z-index: var(--z-scrim);
}

body.op-drawer-open .op-scrim {
  opacity: 1;
  pointer-events: auto;
}

/* ════════════════════════════════════════════════════════════
   MODAL — for token-stats detail
   ════════════════════════════════════════════════════════════ */
.op-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
}

.op-modal-overlay.open { display: flex; }

.op-modal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 24px;
  max-width: 520px;
  width: calc(100% - 32px);
  box-shadow: var(--shadow-lg);
}

.op-modal-card h3 {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 600;
}

.op-modal-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 16px 0;
}

.op-modal-stat {
  background: var(--bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 10px 12px;
}

.op-modal-stat .label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.op-modal-stat .value {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--text);
}

.op-modal-note {
  font-size: 11.5px;
  color: var(--text-muted);
  margin-top: 12px;
  line-height: 1.5;
}

.op-modal-close {
  margin-top: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-soft);
  padding: 6px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 12px;
  font-family: inherit;
}

.op-modal-close:hover {
  background: var(--hover);
  color: var(--text);
}

/* ════════════════════════════════════════════════════════════
   MOBILE — sidebar becomes drawer below 768px
   ════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  body.op-with-sidebar {
    padding-left: 0;
  }

  body.op-with-sidebar.op-rail {
    padding-left: 0;
  }

  .op-sidebar {
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
    width: var(--op-sidebar-w) !important;
    /* Fixed positioning bypasses body's safe-area padding — re-add here */
    padding-top: calc(18px + env(safe-area-inset-top));
    padding-bottom: calc(14px + env(safe-area-inset-bottom));
  }

  body.op-drawer-open .op-sidebar {
    transform: translateX(0);
  }
  /* Chrome bar inherits its top clearance from body's safe-area-inset padding,
     which puts the hamburger below the status bar / Dynamic Island. */

  /* Mobile: show chrome bar (with hamburger), hide its desktop collapse btn */
  .op-chrome { display: flex; }
  .op-chrome-collapse { display: none; }
  .op-chrome-mobile { display: grid; }

  /* Sidebar contents always render in "full" form on mobile */
  body.op-rail .op-side-section-label,
  body.op-rail .op-side-item .op-side-label,
  body.op-rail .op-side-item .op-side-badge,
  body.op-rail .op-brand-text {
    opacity: 1;
    height: auto;
    padding: revert;
    margin: revert;
  }

  body.op-rail .op-token-card {
    opacity: 1;
    height: auto;
    padding: 8px 10px;
    border: 1px solid var(--border);
    margin: 0;
  }

  body.op-rail .op-foot-row {
    flex-direction: row;
  }
}

/* ════════════════════════════════════════════════════════════
   PAGE LAYOUT TWEAK — main content max-width respects sidebar
   ════════════════════════════════════════════════════════════ */
body.op-with-sidebar .op-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 24px 80px;
}

@media (max-width: 768px) {
  body.op-with-sidebar .op-main {
    padding: 16px 16px 60px;
  }
}