/* App shell: rail, module layout, sidebars, page headers, auth screens, palette. */

.app { display: flex; height: 100%; overflow: hidden; }
.app-main { flex: 1; min-width: 0; min-height: 0; display: flex; flex-direction: column; height: 100%; }
.app-outlet { flex: 1; min-height: 0; display: flex; }
.app-outlet > * { flex: 1; min-width: 0; }
.module-placeholder { display: flex; align-items: center; justify-content: center; flex: 1; }

/* -- logo ---------------------------------------------------------------------- */

.logo-mark {
  display: inline-block; width: 30px; height: 30px; border-radius: 9px; position: relative; flex: none;
  background: linear-gradient(135deg, #5b7cff 0%, #3b5bdb 55%, #2f3fae 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18), 0 2px 6px rgba(59, 91, 219, 0.35);
}
.logo-mark::before, .logo-mark::after {
  content: ""; position: absolute; left: 8px; right: 8px; height: 3px; border-radius: 2px; background: #fff;
}
.logo-mark::before { top: 10px; box-shadow: 0 5px 0 rgba(255, 255, 255, 0.75); }
.logo-mark::after { top: 20px; right: 13px; background: #ffd43b; }
.logo-mark-lg { width: 40px; height: 40px; border-radius: 12px; }
.logo-mark-lg::before { left: 11px; right: 11px; top: 13px; height: 4px; box-shadow: 0 7px 0 rgba(255, 255, 255, 0.75); }
.logo-mark-lg::after { left: 11px; right: 18px; top: 27px; height: 4px; }

.boot-splash { height: 100%; display: flex; align-items: center; justify-content: center; }
.boot-logo { width: 44px; height: 44px; border-radius: 13px; background: linear-gradient(135deg, #5b7cff, #2f3fae); animation: boot-pulse 1.2s ease-in-out infinite; }
@keyframes boot-pulse { 50% { transform: scale(0.92); opacity: 0.7; } }

/* -- rail ---------------------------------------------------------------------- */

.rail {
  width: var(--rail-w); flex: none; display: flex; flex-direction: column; align-items: center;
  background: var(--rail-bg); padding: 10px 0 12px; gap: 6px; z-index: 20;
}
.rail-logo { display: flex; margin-bottom: 8px; }
.rail-logo:hover { text-decoration: none; }
.rail-items, .rail-bottom { display: flex; flex-direction: column; align-items: center; gap: 2px; width: 100%; }
.rail-items { flex: 1; min-height: 0; overflow-y: auto; overflow-x: visible; scrollbar-width: none; }
.rail-items::-webkit-scrollbar { display: none; }
.rail-item {
  position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  width: 52px; height: 46px; border-radius: 10px; color: var(--rail-fg); transition: background 0.12s, color 0.12s;
}
.rail-item:hover { background: var(--rail-hover); color: #e4e8f0; text-decoration: none; }
.rail-item.is-active { background: var(--rail-active); color: #fff; }
.rail-item.is-active::before { content: ""; position: absolute; left: -6px; top: 12px; bottom: 12px; width: 3px; border-radius: 0 3px 3px 0; background: #8fa6ff; }
.rail-label { font-size: 9.5px; font-weight: 600; letter-spacing: 0.01em; line-height: 1; }
.rail-badge {
  position: absolute; top: 3px; right: 5px; min-width: 17px; height: 17px; padding: 0 4px; border-radius: 9px;
  background: var(--red); color: #fff; font-size: 10px; font-weight: 700; line-height: 17px; text-align: center;
  box-shadow: 0 0 0 2px var(--rail-bg);
}
.rail-avatar { margin-top: 6px; border-radius: 50%; padding: 2px; }
.rail-avatar:hover { box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.2); }
.rail-avatar .avatar-presence { border-color: var(--rail-bg); }
.rail [data-tip]:hover::after { white-space: pre; }

@media (max-width: 760px) {
  .app { flex-direction: column-reverse; }
  .rail {
    width: 100%; height: calc(58px + env(safe-area-inset-bottom)); flex-direction: row; padding: 4px 6px env(safe-area-inset-bottom);
    gap: 0; border-top: 1px solid rgba(255, 255, 255, 0.06);
  }
  .rail-logo, .rail-avatar { display: none; }
  .rail-items { flex-direction: row; width: 100%; gap: 0; flex: 1; overflow: visible; justify-content: space-around; }
  .rail-item { flex: 1 1 0; min-width: 0; max-width: 84px; width: auto; height: 50px; }
  .rail-label { max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .rail-item.is-active::before { left: 30%; right: 30%; top: -4px; bottom: auto; width: auto; height: 3px; border-radius: 0 0 3px 3px; }
  .rail [data-tip]:hover::after { display: none; }
}

/* -- module layout ------------------------------------------------------------- */

.module { display: flex; height: 100%; min-height: 0; min-width: 0; flex: 1; }
.module-sidebar {
  width: var(--sidebar-w); flex: none; background: var(--surface-2); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; overflow-y: auto; padding-bottom: 16px;
}
.module-main { flex: 1; min-width: 0; display: flex; flex-direction: column; background: var(--surface); min-height: 0; }
.module-scrim { position: fixed; inset: 0; background: rgba(10, 12, 20, 0.4); z-index: 39; animation: fade-in 0.15s; }
@media (max-width: 760px) {
  .module-sidebar {
    position: fixed; top: 0; bottom: 0; left: 0; z-index: 40; width: min(300px, 86vw);
    transform: translateX(-102%); transition: transform 0.22s var(--ease); box-shadow: var(--shadow-3);
  }
  .module-sidebar.is-open { transform: none; }
}

.sidebar-header { display: flex; align-items: center; gap: 8px; padding: 14px 14px 8px 16px; min-height: var(--header-h); }
.sidebar-title { font-size: 17px; font-weight: 700; flex: 1; letter-spacing: -0.02em; }
.sidebar-header-actions { display: flex; gap: 2px; }
.sidebar-section { padding: 6px 8px; }
.sidebar-section-header { display: flex; align-items: center; justify-content: space-between; padding: 6px 8px 4px; min-height: 26px; }
.sidebar-section-title, .sidebar-section-toggle {
  font-size: 11.5px; font-weight: 650; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.05em;
  display: flex; align-items: center; gap: 4px;
}
.sidebar-section-toggle:hover { color: var(--text-2); }
.sidebar-section-chevron { transition: transform 0.15s; transform: rotate(90deg); }
.sidebar-section.is-collapsed .sidebar-section-chevron { transform: none; }
.sidebar-section-actions { display: flex; opacity: 0.0; transition: opacity 0.12s; }
.sidebar-section:hover .sidebar-section-actions, .sidebar-section-actions:focus-within { opacity: 1; }
@media (hover: none) { .sidebar-section-actions { opacity: 1; } }
.sidebar-section-body { display: flex; flex-direction: column; gap: 1px; }
.sidebar-item {
  display: flex; align-items: center; gap: 9px; width: 100%; height: 32px; padding: 0 10px; border-radius: 6px;
  color: var(--text-2); font-size: 13.5px; font-weight: 500; text-align: left; transition: background 0.1s, color 0.1s;
}
.sidebar-item:hover { background: var(--hover); color: var(--text); text-decoration: none; }
.sidebar-item.is-active { background: var(--selected); color: var(--accent-text); font-weight: 600; }
.sidebar-item.is-active .sidebar-icon { color: var(--accent); }
.sidebar-icon { color: var(--text-3); }
.sidebar-dot { width: 9px; height: 9px; border-radius: 3px; flex: none; margin: 0 3px; }
.sidebar-label { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sidebar-count { font-size: 11.5px; font-weight: 650; color: var(--text-3); font-variant-numeric: tabular-nums; }
.sidebar-item.is-active .sidebar-count { color: var(--accent-text); }
.sidebar-count.tone-accent { background: var(--accent); color: #fff; padding: 1px 6px; border-radius: 8px; font-size: 10.5px; }
.sidebar-count.tone-danger { background: var(--red); color: #fff; padding: 1px 6px; border-radius: 8px; font-size: 10.5px; }
.sidebar-item.drop-target { background: var(--accent-soft); box-shadow: inset 0 0 0 1.5px var(--accent); }
.sidebar-compose { padding: 4px 14px 10px; }

/* -- page headers & panes ------------------------------------------------------ */

.page-header {
  display: flex; align-items: center; gap: 10px; min-height: var(--header-h); padding: 8px 20px;
  border-bottom: 1px solid var(--border); background: var(--surface); flex: none;
}
.page-header-icon { color: var(--text-3); display: flex; }
.page-header-text { min-width: 0; flex: 1; }
.page-title { font-size: 16px; font-weight: 700; letter-spacing: -0.015em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.page-subtitle { font-size: 12.5px; color: var(--text-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.page-header-actions { display: flex; align-items: center; gap: 8px; flex: none; }
.page-body { flex: 1; min-height: 0; overflow: auto; padding: 20px; }
.page-body-narrow { max-width: 920px; width: 100%; margin: 0 auto; }
.toolbar { display: flex; align-items: center; gap: 8px; padding: 8px 20px; border-bottom: 1px solid var(--border); flex-wrap: wrap; background: var(--surface); }
@media (max-width: 760px) {
  .page-header { padding: 8px 10px 8px 6px; gap: 6px; }
  .page-body { padding: 14px; }
  .toolbar { padding: 8px 12px; }
  .page-header-actions .btn-label { display: none; }
  .page-header-actions .btn { padding: 0; width: var(--btn-h); }
}

.connection-banner {
  display: flex; align-items: center; justify-content: center; gap: 8px; padding: 5px 12px;
  background: var(--yellow-soft); color: var(--yellow-text); font-size: 12.5px; font-weight: 550; flex: none;
}
.desktop-prompt {
  display: flex; align-items: center; gap: 10px; padding: 6px 12px 6px 16px; background: var(--accent-soft); color: var(--accent-text);
  font-size: 13px; flex: none; border-bottom: 1px solid var(--border);
}
.desktop-prompt span { flex: 1; }

/* -- notifications panel -------------------------------------------------------- */

.notif-panel { display: flex; flex-direction: column; max-height: min(640px, calc(100vh - 32px)); }
.notif-header { display: flex; align-items: center; gap: 8px; padding: 12px 12px 10px 16px; border-bottom: 1px solid var(--divider); }
.notif-header h2 { font-size: 15px; flex: 1; }
.notif-list { overflow-y: auto; flex: 1; }
.notif-item { display: flex; gap: 12px; align-items: flex-start; width: 100%; padding: 11px 16px; text-align: left; border-bottom: 1px solid var(--divider); }
.notif-item:hover { background: var(--hover); }
.notif-item.is-unread { background: color-mix(in srgb, var(--accent-soft) 55%, transparent); }
.notif-avatar { position: relative; flex: none; }
.notif-type-icon { width: 30px; height: 30px; border-radius: 50%; background: var(--surface-3); color: var(--text-2); display: flex; align-items: center; justify-content: center; }
.notif-type-badge { position: absolute; right: -4px; bottom: -3px; width: 17px; height: 17px; border-radius: 50%; background: var(--accent); color: #fff; display: flex; align-items: center; justify-content: center; box-shadow: 0 0 0 2px var(--surface); }
.notif-text { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.notif-title { font-size: 13.5px; font-weight: 550; color: var(--text); }
.notif-body { font-size: 12.5px; color: var(--text-2); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.notif-time { font-size: 11.5px; color: var(--text-3); }
.notif-unread-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); margin-top: 6px; flex: none; }

/* -- command palette ----------------------------------------------------------- */

.palette-backdrop { padding-top: 12vh; }
.palette {
  width: 100%; max-width: 620px; background: var(--surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-3);
  overflow: hidden; display: flex; flex-direction: column; max-height: 70vh; animation: pop-in 0.14s var(--ease);
}
.palette-input-row { display: flex; align-items: center; gap: 10px; padding: 0 16px; border-bottom: 1px solid var(--divider); color: var(--text-3); }
.palette-input { flex: 1; height: 54px; border: 0; outline: none; background: transparent; font-size: 16px; color: var(--text); }
.palette-list { overflow-y: auto; padding: 6px; flex: 1; }
.palette-group { padding: 8px 10px 4px; font-size: 11px; font-weight: 650; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.05em; }
.palette-item { display: flex; align-items: center; gap: 10px; width: 100%; min-height: 38px; padding: 4px 10px; border-radius: 6px; text-align: left; }
.palette-item.is-active { background: var(--selected); }
.palette-icon { color: var(--text-3); }
.palette-item.is-active .palette-icon { color: var(--accent); }
.palette-label { font-size: 14px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.palette-hint { color: var(--text-3); font-size: 12.5px; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.palette-shortcut { margin-left: auto; color: var(--text-3); font-size: 12px; }
.palette-empty { padding: 28px; text-align: center; color: var(--text-3); }
.palette-footer { display: flex; gap: 16px; padding: 8px 14px; border-top: 1px solid var(--divider); font-size: 12px; color: var(--text-3); background: var(--surface-2); }
.palette-footer span { display: flex; align-items: center; gap: 4px; }

.shortcut-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px 28px; }
.shortcut-group h3 { font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-3); margin-bottom: 8px; }
.shortcut-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 4px 0; font-size: 13px; }
.shortcut-keys { display: flex; gap: 3px; flex: none; }

/* -- auth screens -------------------------------------------------------------- */

.auth-page {
  min-height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 32px 16px;
  background:
    radial-gradient(1200px 600px at 10% -10%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 60%),
    radial-gradient(900px 500px at 110% 110%, color-mix(in srgb, var(--purple) 12%, transparent), transparent 60%),
    var(--bg);
}
.auth-card { width: 100%; max-width: 400px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-xl); box-shadow: var(--shadow-3); padding: 28px 28px 24px; }
.auth-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 22px; }
.auth-brand-name { font-weight: 750; font-size: 18px; letter-spacing: -0.02em; }
.auth-title { font-size: 21px; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 6px; }
.auth-subtitle { color: var(--text-3); margin-bottom: 18px; font-size: 13.5px; }
.auth-card form { margin-top: 18px; }
.auth-footer { margin-top: 18px; font-size: 13px; }
.auth-divider { display: flex; align-items: center; gap: 10px; color: var(--text-3); font-size: 12px; margin: 4px 0; }
.auth-divider::before, .auth-divider::after { content: ""; flex: 1; border-top: 1px solid var(--border); }

/* -- sidebar you can reorder (hold and drag) ------------------------------------------- */
.sidebar-sortable { display: flex; flex-direction: column; gap: 1px; }
.sidebar-sortable-item { -webkit-user-drag: none; -webkit-touch-callout: none; touch-action: pan-y; }
.sidebar-sortable.is-sorting, .sidebar-sortable.is-sorting * { user-select: none; -webkit-user-select: none; cursor: grabbing; }
.sidebar-sortable-item.is-dragging {
  position: relative; z-index: 2; background: var(--surface); color: var(--text);
  box-shadow: var(--shadow-2), 0 0 0 1px var(--border); transform: scale(1.02);
}
@media (pointer: coarse) { .sidebar-sortable-item { user-select: none; -webkit-user-select: none; } }

/* -- dividers between panels (ui/split.js): a hairline that turns blue when you grab it -- */
.pane-split { flex: 0 0 1px; align-self: stretch; position: relative; z-index: 4; background: var(--divider); touch-action: none; cursor: col-resize; }
.pane-split::before { content: ''; position: absolute; top: 0; bottom: 0; left: -4px; right: -4px; }
.pane-split::after { content: ''; position: absolute; top: 0; bottom: 0; left: -1px; width: 3px; background: var(--accent); opacity: 0; transition: opacity 0.12s; }
.pane-split:hover::after, .pane-split.is-live::after, .pane-split:focus-visible::after { opacity: 0.85; }
.pane-split:focus-visible { outline: none; }
@media (pointer: coarse) { .pane-split::before { left: -10px; right: -10px; } }
/* A grip in the middle so it's plain the line can be dragged. */
.pane-grip {
  position: absolute; z-index: 1; top: 50%; left: 50%; width: 6px; height: 36px; margin: -18px 0 0 -3px; border-radius: 3px;
  background: var(--surface); border: 1px solid var(--border-strong); pointer-events: none;
  background-image: radial-gradient(circle, var(--text-3) 1px, transparent 1.3px); background-size: 4px 6px; background-position: center;
  transition: border-color 0.12s, background-color 0.12s;
}
:is(.pane-split, .tool-resizer):is(:hover, .is-live, :focus-visible) .pane-grip { border-color: var(--accent); background-color: var(--accent-soft); }
@media (max-width: 760px) { .pane-split { display: none; } }
.is-col-resizing, .is-col-resizing * { cursor: col-resize !important; user-select: none !important; }
.is-col-resizing iframe { pointer-events: none; }