/* ==========================================================================
   App shell: sidebar, topbar, content frame
   ========================================================================== */

.app { display: flex; min-height: 100vh; }

/* ---------- Sidebar ---------- */
.sidebar {
  position: fixed; inset: 0 auto 0 0; z-index: 30;
  width: var(--sb-w);
  display: flex; flex-direction: column;
  background: var(--grad-sidebar);
  border-right: 1px solid rgba(167, 139, 250, .10);
  color: #d9cff0;
  transition: width var(--t-slow) var(--ease-out), transform var(--t-slow) var(--ease-out);
  overflow: hidden;
}
.sidebar::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(400px 220px at 0% 0%, rgba(167, 139, 250, .16), transparent 70%);
}

.sb-brand { height: var(--topbar-h); display: flex; align-items: center; padding: 0 20px; flex-shrink: 0; border-bottom: 1px solid rgba(167, 139, 250, .08); }
.sb-logo { position: relative; display: flex; align-items: center; height: 40px; width: 100%; }
.sb-wordmark { display: flex; align-items: flex-end; gap: 1.5px; transition: opacity var(--t) var(--ease), transform var(--t-slow) var(--ease-out); }
.sb-wordmark img { height: 30px; width: auto; }
/* "AI" as live text, sized/placed to the original logo's proportions (cap height ≈ 1/5 of the wordmark,
   baseline ~3px above its bottom) — the raster version blurs at sidebar size. */
.sb-ai {
  font-size: 9px; font-weight: 700; letter-spacing: .03em; line-height: 1;
  color: #9b6cf6; padding-bottom: 2px;
  text-shadow: 0 0 6px rgba(167, 139, 250, .35);
}
.sb-mark { position: absolute; left: -2px; width: 38px; height: 38px; opacity: 0; transform: scale(.6) rotate(-30deg); transition: opacity var(--t) var(--ease), transform var(--t-slow) var(--spring); filter: drop-shadow(0 0 12px rgba(167, 139, 250, .45)); }

.sb-nav { flex: 1; overflow-y: auto; overflow-x: hidden; padding: 14px 12px 20px; position: relative; z-index: 1; }
.sb-nav::-webkit-scrollbar { width: 6px; }
.sb-nav::-webkit-scrollbar-thumb { background: rgba(167, 139, 250, .2); border: 0; }

.sb-group { margin-bottom: 16px; }
.sb-group-label {
  font-family: var(--mono); font-size: 10px; letter-spacing: .18em; text-transform: uppercase;
  color: rgba(196, 181, 253, .45); padding: 8px 12px 6px; white-space: nowrap;
  transition: opacity var(--t) var(--ease);
}

.sb-link {
  position: relative;
  display: flex; align-items: center; gap: 12px;
  height: 40px; padding: 0 12px; margin: 2px 0;
  border-radius: 10px;
  font-weight: 500; font-size: 13.5px; white-space: nowrap;
  color: rgba(226, 217, 247, .72);
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.sb-link svg { width: 18px; height: 18px; transition: transform var(--t) var(--spring); }
.sb-link:hover { background: rgba(167, 139, 250, .09); color: #fff; }
.sb-link:hover svg { transform: scale(1.1); }
.sb-link.active { color: #fff; background: linear-gradient(90deg, rgba(139, 92, 246, .38), rgba(139, 92, 246, .14)); box-shadow: inset 0 0 0 1px rgba(167, 139, 250, .25); }
.sb-link.active::before {
  content: ''; position: absolute; left: -12px; top: 9px; bottom: 9px; width: 3px; border-radius: 0 3px 3px 0;
  background: #c4b5fd; box-shadow: 0 0 12px #a78bfa;
}
.sb-label { flex: 1; transition: opacity var(--t) var(--ease); }
.sb-count {
  min-width: 22px; height: 20px; padding: 0 6px; border-radius: 10px;
  display: grid; place-items: center;
  font-size: 11px; font-weight: 600; font-variant-numeric: tabular-nums;
  background: rgba(167, 139, 250, .18); color: #e9e2ff;
  transition: opacity var(--t) var(--ease);
}
.sb-count.hot { background: #7c3aed; color: #fff; }

.sb-foot { padding: 12px; border-top: 1px solid rgba(167, 139, 250, .08); position: relative; z-index: 1; display: flex; align-items: center; gap: 4px; }
.sb-user { display: flex; align-items: center; gap: 10px; padding: 8px; border-radius: 12px; transition: background var(--t-fast); white-space: nowrap; flex: 1; min-width: 0; }
.sb-logout {
  flex-shrink: 0; width: 32px; height: 32px; display: grid; place-items: center; cursor: pointer;
  border-radius: 10px; color: rgba(196, 181, 253, .55);
  transition: background var(--t-fast), color var(--t-fast);
}
.sb-logout svg { width: 16px; height: 16px; }
.sb-logout:hover { background: rgba(251, 113, 133, .14); color: #fda4af; }
.app.collapsed .sb-logout { display: none; }
.sb-user:hover { background: rgba(167, 139, 250, .08); }
.sb-user-meta { overflow: hidden; transition: opacity var(--t) var(--ease); }
.sb-user-meta b { display: block; font-size: 13px; color: #fff; font-weight: 600; }
.sb-user-meta span { font-size: 11.5px; color: rgba(196, 181, 253, .6); }

/* Collapsed */
.app.collapsed .sidebar { width: var(--sb-w-collapsed); }
.app.collapsed .sb-wordmark { opacity: 0; transform: translateX(-12px); pointer-events: none; }
.app.collapsed .sb-mark { opacity: 1; transform: none; }
.app.collapsed .sb-label,
.app.collapsed .sb-count,
.app.collapsed .sb-user-meta { opacity: 0; pointer-events: none; }
.app.collapsed .sb-group-label { opacity: 0; height: 12px; padding: 0; }
.app.collapsed .sb-link { justify-content: flex-start; padding: 0 17px; }
.app.collapsed .sb-count.hot { opacity: 1; position: absolute; top: 4px; left: 32px; min-width: 8px; width: 8px; height: 8px; padding: 0; font-size: 0; }

/* Tooltip for collapsed links */
.sb-tip {
  position: fixed; z-index: 60; pointer-events: none;
  background: var(--violet-900); color: #fff; font-size: 12px; font-weight: 500;
  padding: 6px 10px; border-radius: 8px; box-shadow: var(--shadow-lg);
  border: 1px solid rgba(167, 139, 250, .25);
  opacity: 0; transform: translateX(-4px); transition: opacity var(--t-fast), transform var(--t-fast);
}
.sb-tip.show { opacity: 1; transform: none; }

.sb-scrim { display: none; }

/* ---------- Main ---------- */
.main {
  flex: 1; min-width: 0;
  margin-left: var(--sb-w);
  transition: margin-left var(--t-slow) var(--ease-out);
  display: flex; flex-direction: column;
}
.app.collapsed .main { margin-left: var(--sb-w-collapsed); }

/* ---------- Topbar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 16px;
  padding: 0 28px 0 18px;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.tb-title { min-width: 0; }
.tb-title h1 { font-size: 17px; font-weight: 650; letter-spacing: -.01em; }
.tb-title p { font-size: 12px; color: var(--text-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tb-title.swap h1, .tb-title.swap p { animation: fadeUp 380ms var(--ease-out); }

.tb-search {
  margin-left: auto;
  display: flex; align-items: center; gap: 10px;
  width: min(340px, 30vw); height: 38px; padding: 0 8px 0 12px;
  border-radius: 10px; border: 1px solid var(--border); background: var(--surface);
  color: var(--text-3); font-size: 13px;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.tb-search:hover { border-color: var(--border-strong); box-shadow: 0 0 0 4px var(--primary-soft); }
.tb-search svg { width: 16px; height: 16px; }
.tb-search-text { flex: 1; text-align: left; white-space: nowrap; overflow: hidden; }
.tb-search kbd { padding: 3px 6px; border-radius: 6px; background: var(--surface-3); border: 1px solid var(--border); color: var(--text-2); }

.tb-actions { display: flex; align-items: center; gap: 10px; }

.icon-btn {
  position: relative;
  width: 38px; height: 38px; border-radius: 10px;
  display: grid; place-items: center;
  color: var(--text-2);
  transition: background var(--t-fast), color var(--t-fast), transform var(--t-fast);
}
.icon-btn svg { width: 19px; height: 19px; }
.icon-btn:hover { background: var(--surface-3); color: var(--text); }
.icon-btn:active { transform: scale(.94); }
.dot-badge { position: absolute; top: 8px; right: 9px; width: 8px; height: 8px; border-radius: 50%; background: var(--danger); box-shadow: 0 0 0 2px var(--bg); color: var(--danger); animation: pulseRing 1.8s infinite; }
.dot-badge.off { display: none; }

.theme-toggle { display: flex; padding: 3px; gap: 2px; border-radius: 11px; background: var(--surface); border: 1px solid var(--border); position: relative; }
.theme-toggle button { position: relative; z-index: 1; width: 30px; height: 30px; border-radius: 8px; display: grid; place-items: center; color: var(--text-3); transition: color var(--t); }
.theme-toggle button svg { width: 16px; height: 16px; }
.theme-toggle::before {
  content: ''; position: absolute; top: 3px; left: 3px; width: 30px; height: 30px; border-radius: 8px;
  background: var(--primary-soft); box-shadow: inset 0 0 0 1px var(--primary-ring);
  transition: transform var(--t-slow) var(--spring);
}
[data-theme="dark"] .theme-toggle::before { transform: translateX(32px); }
[data-theme="light"] .theme-toggle button[data-theme-set="light"],
[data-theme="dark"] .theme-toggle button[data-theme-set="dark"] { color: var(--primary); }

.me-btn { display: flex; align-items: center; gap: 8px; padding: 3px; border-radius: 12px; transition: background var(--t-fast); }
.me-btn:hover { background: var(--surface-3); }

/* ---------- Content ---------- */
.content { padding: 26px 28px 60px; outline: none; max-width: 1640px; width: 100%; margin: 0 auto; }
.content.leaving { opacity: 0; transform: translateY(6px); transition: opacity 160ms var(--ease), transform 160ms var(--ease); }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .tb-search { width: 38px; padding: 0; justify-content: center; }
  .tb-search-text, .tb-search kbd { display: none; }
}

@media (max-width: 860px) {
  .sidebar { transform: translateX(-100%); width: var(--sb-w) !important; box-shadow: var(--shadow-lg); }
  .app.mobile-open .sidebar { transform: none; }
  .app.collapsed .sb-wordmark { opacity: 1; transform: none; }
  .app.collapsed .sb-mark { opacity: 0; }
  .app.collapsed .sb-label, .app.collapsed .sb-count, .app.collapsed .sb-user-meta, .app.collapsed .sb-group-label { opacity: 1; }
  .sb-scrim { display: block; position: fixed; inset: 0; z-index: 25; background: var(--scrim); opacity: 0; visibility: hidden; transition: opacity var(--t), visibility var(--t); }
  .app.mobile-open .sb-scrim { opacity: 1; visibility: visible; }
  .main, .app.collapsed .main { margin-left: 0; }
  .topbar { padding: 0 16px 0 10px; gap: 10px; }
  .content { padding: 18px 16px 48px; }
  .hide-sm { display: none; }
  .theme-toggle { display: none; }
}
@media (max-width: 520px) {
  .tb-title p { display: none; }
  .me-btn .me-meta { display: none; }
}