/* ===================== Design tokens (glassmorphism) =====================
   Mirrors the School Dashboard's design system: frosted glass surfaces,
   a floating pill topbar, gradient headings, and a palette system swapped
   via [data-palette] on <body>. */
:root {
  --bg-solid: #eef1f8;
  --glass-bg: rgba(255, 255, 255, 0.42);
  --glass-bg-strong: rgba(255, 255, 255, 0.62);
  /* Modals and dropdown popovers float directly over other content (not
     inside .main-container's own blurred backdrop), so they need a much
     less transparent surface than cards/rows do to stay legible -- see
     .modal-box / .cat-picker-popover. */
  --surface-opaque: rgba(255, 255, 255, 0.97);
  --glass-border: rgba(15, 23, 42, 0.08);
  --glass-shadow: 0 8px 32px rgba(27, 30, 36, 0.1);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --accent-1: #6366f1;
  --accent-2: #a855f7;
  --accent-3: #ec4899;
  --accent-grad: linear-gradient(135deg, var(--accent-1), var(--accent-2), var(--accent-3));
  --glow-accent: rgba(168, 85, 247, 0.35);
  --scrollbar-thumb: rgba(99, 102, 241, 0.4);
  --danger: #ef4444;
  --success: #22c55e;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-base: 0.3s;
}

body.dark-theme {
  --bg-solid: #05050a;
  --glass-bg: rgba(255, 255, 255, 0.055);
  --glass-bg-strong: rgba(255, 255, 255, 0.09);
  --surface-opaque: rgba(17, 17, 26, 0.97);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.55);
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --glow-accent: rgba(168, 85, 247, 0.55);
  --scrollbar-thumb: rgba(167, 139, 250, 0.5);
}

body[data-palette="mint"] { --accent-1:#22c55e; --accent-2:#14b8a6; --accent-3:#06b6d4; --accent-grad: linear-gradient(135deg,#22c55e,#14b8a6,#06b6d4); --glow-accent: rgba(34,197,94,.32); }
body[data-palette="sunset"] { --accent-1:#f59e0b; --accent-2:#f97316; --accent-3:#ef4444; --accent-grad: linear-gradient(135deg,#f59e0b,#f97316,#ef4444); --glow-accent: rgba(249,115,22,.32); }
body[data-palette="midnight"] { --accent-1:#1d4ed8; --accent-2:#4338ca; --accent-3:#7c3aed; --accent-grad: linear-gradient(135deg,#1d4ed8,#4338ca,#7c3aed); --glow-accent: rgba(67,56,202,.34); }
body[data-palette="rose"] { --accent-1:#f43f5e; --accent-2:#ec4899; --accent-3:#fb7185; --accent-grad: linear-gradient(135deg,#f43f5e,#ec4899,#fb7185); --glow-accent: rgba(244,63,94,.32); }
body[data-palette="monochrome"] { --accent-1:#404040; --accent-2:#737373; --accent-3:#a3a3a3; --accent-grad: linear-gradient(135deg,#404040,#737373,#a3a3a3); --glow-accent: rgba(115,115,115,.3); }

* { box-sizing: border-box; }
html, body { overflow-x: hidden; max-width: 100vw; }
html { background-color: #eef1f8; }
@media (prefers-color-scheme: dark) { html { background-color: #05050a; } }

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  padding: 1rem;
  background-color: var(--bg-solid);
  color: var(--text-primary);
  position: relative;
  transition: background-color 0.6s ease-in-out, color 0.5s ease-in-out;
  min-height: 100vh;
}
@media (min-width: 640px) { body { padding: 2rem; } }


::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 9999px; }

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.hidden { display: none !important; }

.gradient-text {
  background: var(--accent-grad);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  margin: 0;
}

/* ===================== Topbar ===================== */
.app-topbar {
  display: flex; align-items: center; gap: 1rem;
  position: fixed; top: max(1rem, env(safe-area-inset-top)); left: 50%; transform: translateX(-50%);
  width: min(94vw, 900px); height: 4rem; padding: 0 1rem; z-index: 40;
  background: var(--glass-bg-strong); border: 1px solid var(--glass-border); border-radius: 9999px;
  backdrop-filter: blur(28px) saturate(180%); -webkit-backdrop-filter: blur(28px) saturate(180%);
  box-shadow: 0 12px 36px rgba(0,0,0,.12), 0 2px 8px rgba(0,0,0,.05);
  transition: background-color .5s, border-color .5s;
}
.topbar-logo {
  flex-shrink: 0; width: 2.75rem; height: 2.75rem; border: none; border-radius: 0.9rem;
  background: var(--accent-grad); display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 1.1rem; box-shadow: 0 6px 18px var(--glow-accent);
  cursor: default; font-family: inherit;
}
/* The app-root logo doubles as a manual refresh button (click to force-reload
   the current view) -- the auth-gate one stays non-interactive via the
   .auth-card override below, since there's nothing to refresh there yet. */
#app-refresh-btn { cursor: pointer; transition: transform 0.15s ease; }
#app-refresh-btn:hover { transform: scale(1.06); }
#app-refresh-btn:active { transform: scale(0.94); }
#app-refresh-btn.refreshing { animation: logo-pulse 0.9s ease-in-out infinite; cursor: wait; }
@keyframes logo-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

/* Thin top-of-viewport progress bar shown during background data refreshes
   -- signals "this view is updating" without wiping the page to a spinner
   and losing whatever was already on screen. */
#top-progress-bar {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%; background: var(--accent-grad);
  z-index: 9999; opacity: 0; pointer-events: none;
  transition: width 0.4s var(--ease-out), opacity 0.2s ease;
}
#top-progress-bar.active { opacity: 1; width: 75%; }
#top-progress-bar.done { width: 100%; opacity: 0; transition: width 0.25s var(--ease-out), opacity 0.4s ease 0.15s; }
.topbar-nav { display: flex; align-items: center; gap: 0.35rem; flex: 1; overflow-x: auto; scrollbar-width: none; }
.topbar-nav::-webkit-scrollbar { display: none; }
.nav-link {
  display: flex; align-items: center; gap: 0.4rem; height: 2.75rem; padding: 0 0.9rem; flex-shrink: 0;
  border-radius: 9999px; color: var(--text-muted); font-size: 0.85rem; font-weight: 600;
  background: transparent; border: none; cursor: pointer; white-space: nowrap;
  transition: background-color .2s, color .2s;
}
.nav-link svg { width: 1.15rem; height: 1.15rem; flex-shrink: 0; }
.nav-link:hover { color: var(--text-primary); background: var(--glass-bg); }
.nav-link.active { background: var(--accent-grad); color: #fff; box-shadow: 0 6px 16px var(--glow-accent); }
.nav-link .nav-badge {
  background: rgba(0,0,0,0.15); border-radius: 9999px; font-size: 0.65rem; padding: 0.05rem 0.4rem; font-weight: 700;
}
.nav-link.active .nav-badge { background: rgba(255,255,255,0.3); }
@media (max-width: 720px) { .nav-link span.nav-label { display: none; } .nav-link { padding: 0 0.6rem; } }

/* ===================== Shell / cards ===================== */
.app-shell { max-width: 1400px; margin: 0 auto; padding-top: calc(5.5rem + env(safe-area-inset-top)); position: relative; z-index: 1; }
.app-view.hidden { display: none; }
.main-container {
  background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: 1.75rem;
  padding: 1.75rem clamp(1rem, 4vw, 2.5rem); box-shadow: var(--glass-shadow);
  backdrop-filter: blur(20px) saturate(160%); -webkit-backdrop-filter: blur(20px) saturate(160%);
  transition: background-color .5s, border-color .5s;
  margin-bottom: 1.5rem;
}
.glass-card {
  background: var(--glass-bg-strong); border: 1px solid var(--glass-border); border-radius: 1.25rem;
  padding: 1.25rem; transition: background-color .5s, border-color .5s, transform .15s;
}

.view-header { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start; gap: 1rem; margin-bottom: 1.5rem; }
.view-header h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800; letter-spacing: -0.02em; }
.view-header p { color: var(--text-secondary); margin: 0.2rem 0 0; }

/* ===================== Buttons / inputs ===================== */
.btn {
  display: inline-flex; align-items: center; gap: 0.4rem; border: none; border-radius: 9999px;
  padding: 0.6rem 1.1rem; font-weight: 600; font-size: 0.85rem; cursor: pointer;
  background: var(--glass-bg-strong); color: var(--text-primary); border: 1px solid var(--glass-border);
  transition: transform .12s, box-shadow .2s, background-color .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0) scale(0.98); }
.btn-primary { background: var(--accent-grad); color: #fff; box-shadow: 0 6px 16px var(--glow-accent); border: none; }
.btn-danger { background: var(--danger); color: #fff; border: none; }
.btn-ghost { background: transparent; border: 1px solid var(--glass-border); }
.btn-sm { padding: 0.4rem 0.75rem; font-size: 0.75rem; }
.icon-btn {
  width: 2.5rem; height: 2.5rem; display: inline-flex; align-items: center; justify-content: center;
  border-radius: 9999px; border: 1px solid var(--glass-border); background: var(--glass-bg-strong);
  color: var(--text-secondary); cursor: pointer; transition: color .2s, background-color .2s;
}
.icon-btn:hover { color: var(--text-primary); }
.icon-btn svg { width: 1.1rem; height: 1.1rem; }

.form-field { display: flex; flex-direction: column; gap: 0.35rem; margin-bottom: 0.9rem; }
.form-field label { font-size: 0.78rem; font-weight: 600; color: var(--text-secondary); }
.form-input, .form-select, textarea.form-input {
  border-radius: 0.75rem; border: 1px solid var(--glass-border); background: var(--glass-bg-strong);
  color: var(--text-primary); padding: 0.6rem 0.85rem; font-size: 0.88rem; font-family: inherit;
  outline: none; transition: border-color .2s, box-shadow .2s;
}
.form-input:focus, .form-select:focus { border-color: var(--accent-1); box-shadow: 0 0 0 3px var(--glow-accent); }
.form-row { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.form-row > * { flex: 1; min-width: 140px; }
.form-hint { font-size: 0.72rem; color: var(--text-muted); }

.emoji-picker { display: flex; gap: 0.75rem; align-items: flex-start; }
.emoji-picker-grid { display: grid; grid-template-columns: repeat(10, 1fr); gap: 0.25rem; margin-bottom: 0.5rem; }
.emoji-picker-btn {
  border: 1px solid transparent; background: var(--glass-bg); border-radius: 0.5rem; cursor: pointer;
  font-size: 1.05rem; line-height: 1; padding: 0.3rem 0; display: flex; align-items: center; justify-content: center;
  transition: background-color .12s, border-color .12s;
}
.emoji-picker-btn:hover { background: var(--glass-bg-strong); }
.emoji-picker-btn.selected { border-color: var(--accent-1); background: var(--glass-bg-strong); box-shadow: 0 0 0 2px var(--glow-accent); }
.emoji-picker-custom { display: flex; gap: 0.4rem; }
.emoji-picker-custom .form-input { flex: 1; font-size: 0.85rem; }

/* ===================== Home dashboard widgets ===================== */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.stat-tile { text-align: left; }
.stat-tile .stat-value { font-size: 2rem; font-weight: 800; letter-spacing: -0.02em; }
.stat-tile .stat-label { color: var(--text-muted); font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }
.stat-tile.accent-1 .stat-value { color: var(--accent-1); }
.stat-tile.accent-3 .stat-value { color: var(--accent-3); }

.home-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 1.25rem; align-items: start; }
@media (max-width: 900px) { .home-grid { grid-template-columns: 1fr; } }
.panel-title { font-size: 1.05rem; font-weight: 700; margin: 0 0 0.9rem; display: flex; align-items: center; justify-content: space-between; }

.account-status-row { display: flex; align-items: center; gap: 0.6rem; padding: 0.5rem 0; border-bottom: 1px solid var(--glass-border); font-size: 0.85rem; }
.account-status-row:last-child { border-bottom: none; }
.color-dot { width: 0.6rem; height: 0.6rem; border-radius: 50%; flex-shrink: 0; }
.status-pill { font-size: 0.65rem; font-weight: 700; padding: 0.15rem 0.5rem; border-radius: 9999px; text-transform: uppercase; letter-spacing: 0.03em; }
.status-pill.idle { background: rgba(34,197,94,.15); color: #16a34a; }
.status-pill.syncing { background: rgba(99,102,241,.15); color: var(--accent-1); }
.status-pill.error { background: rgba(239,68,68,.15); color: var(--danger); }
body.dark-theme .status-pill.idle { color: #4ade80; }
body.dark-theme .status-pill.error { color: #f87171; }

/* ===================== Category chips (front-and-center sorting) ===================== */
.category-rail { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.1rem; }
.category-chip {
  display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.45rem 0.85rem; border-radius: 9999px;
  font-size: 0.8rem; font-weight: 600; border: 1px solid var(--glass-border); background: var(--glass-bg-strong);
  color: var(--text-secondary); cursor: pointer; transition: all .15s;
}
.category-chip .chip-dot { width: 0.55rem; height: 0.55rem; border-radius: 50%; }
.category-chip:hover { color: var(--text-primary); transform: translateY(-1px); }
.category-chip.active { color: #fff; border-color: transparent; }
.category-chip .chip-count { opacity: 0.75; font-weight: 700; }

/* ===================== Message list ===================== */
.mailbox-tabs { display: flex; gap: 0.4rem; margin-bottom: 1rem; }
.mailbox-tab { padding: 0.45rem 0.9rem; border-radius: 0.75rem; font-size: 0.82rem; font-weight: 600; border: 1px solid var(--glass-border); background: var(--glass-bg-strong); color: var(--text-secondary); cursor: pointer; }
.mailbox-tab.active { background: var(--accent-grad); color: #fff; border-color: transparent; }

/* Full-width single list -- opening a message is a modal (see .modal-box-wide
   / messageCardHtml) rather than a side-by-side reading pane, so there's no
   second column height to match anymore; the page scrolls normally. */
.message-list { display: flex; flex-direction: column; gap: 0.5rem; }
.message-row {
  display: flex; align-items: flex-start; gap: 0.75rem; padding: 0.85rem 1rem; border-radius: 1rem;
  border: 1px solid var(--glass-border); background: var(--glass-bg-strong); cursor: pointer;
  transition: transform .12s, box-shadow .15s, border-color .15s;
}
.message-row:hover { transform: translateY(-1px); box-shadow: 0 8px 20px rgba(0,0,0,0.08); }
.message-row.selected { border-color: var(--accent-1); box-shadow: 0 0 0 2px var(--glow-accent); }
/* Unread mail should read as clearly "new" against a list of already-read
   mail: bolder + full-contrast text plus a colored left edge, vs. read rows
   which fall back to muted, lighter-weight text. The category dot itself
   stays purely about category color either way -- it's not also doing
   double duty as a second "this is unread" signal anymore. A border (not
   box-shadow) carries the left edge so it composes independently of the
   hover/selected box-shadows above instead of one overwriting the other. */
.message-row { border-left: 3px solid transparent; }
.message-row.unread { border-left-color: var(--accent-1); }
.message-row.unread .msg-subject, .message-row.unread .msg-from { font-weight: 800; color: var(--text-primary); }
.message-row:not(.unread) .msg-subject, .message-row:not(.unread) .msg-from { font-weight: 500; color: var(--text-muted); }
.message-row .msg-main { flex: 1; min-width: 0; }
.message-row .msg-top-line { display: flex; justify-content: space-between; gap: 0.5rem; align-items: baseline; }
.msg-from { font-size: 0.85rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.msg-date { font-size: 0.7rem; color: var(--text-muted); flex-shrink: 0; }
.msg-subject { font-size: 0.85rem; margin: 0.1rem 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.msg-snippet { font-size: 0.78rem; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.msg-badges { display: flex; gap: 0.3rem; margin-top: 0.35rem; }
.msg-cat-dot { width: 0.5rem; height: 0.5rem; border-radius: 50%; flex-shrink: 0; margin-top: 0.4rem; }
.msg-flag { color: #f59e0b; }
.msg-select-checkbox { width: 1rem; height: 1rem; margin-top: 0.35rem; flex-shrink: 0; accent-color: var(--accent-1); cursor: pointer; }

.reading-pane-empty { display: flex; align-items: center; justify-content: center; min-height: 300px; color: var(--text-muted); font-size: 0.9rem; }
.reading-pane-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; margin-bottom: 1rem; padding-bottom: 1rem; border-bottom: 1px solid var(--glass-border); }
.reading-pane-header h2 { font-size: 1.2rem; margin: 0 0 0.4rem; }
.reading-pane-actions { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.reading-pane-body { font-size: 0.9rem; line-height: 1.6; color: var(--text-primary); overflow-wrap: anywhere; }
.reading-pane-body iframe { width: 100%; border: none; min-height: 300px; background: transparent; }
.reading-pane-meta { font-size: 0.8rem; color: var(--text-muted); }

/* quick "sort into" control on each message row */
.sort-select {
  border-radius: 0.6rem; border: 1px solid var(--glass-border); background: var(--glass-bg);
  color: var(--text-secondary); font-size: 0.72rem; padding: 0.25rem 0.4rem; font-family: inherit;
}

/* ===================== Rule builder ===================== */
.rule-row { display: grid; grid-template-columns: 1.2fr 0.8fr 0.7fr 1.4fr 1fr auto auto; gap: 0.5rem; align-items: center; padding: 0.6rem 0.5rem; border-bottom: 1px solid var(--glass-border); font-size: 0.82rem; }
.rule-row:last-child { border-bottom: none; }
@media (max-width: 900px) { .rule-row { grid-template-columns: 1fr 1fr; } }
.rule-priority-badge { font-size: 0.7rem; font-weight: 700; color: var(--text-muted); }

/* Rules grouped by target category into a collapsible dropdown per group --
   a flat list of 70+ imported rules was unreadable, and priority order
   (the thing that actually matters for evaluation) is unaffected by how
   they're displayed here. */
.rule-group { border-bottom: 1px solid var(--glass-border); }
.rule-group:last-child { border-bottom: none; }
.rule-group-header {
  width: 100%; display: flex; align-items: center; gap: 0.6rem; padding: 0.6rem 0.25rem;
  border: none; background: none; cursor: pointer; text-align: left; font: inherit; color: inherit;
  border-radius: 0.6rem; transition: background-color 0.12s;
}
.rule-group-header:hover { background: var(--glass-bg); }
.rule-group-label { font-weight: 700; flex: 1; }
.rule-group-body { padding-left: 2.8rem; }
.rule-group-body.hidden { display: none; }
@media (max-width: 600px) { .rule-group-body { padding-left: 0; } }

/* Rounded-square category icon (initials or a user-picked emoji) -- used
   standalone (not nested under a wrapper class), so its own rule has to
   carry the sizing/centering rather than relying on a parent selector. */
.cat-icon {
  width: 2.4rem; height: 2.4rem; border-radius: 0.65rem; display: flex; align-items: center;
  justify-content: center; color: #fff; font-weight: 800; font-size: 0.85rem; line-height: 1;
  flex-shrink: 0; overflow: hidden;
}

/* ===================== Category tree ===================== */
.cat-tree { margin-bottom: 1.5rem; }
.cat-tree-row {
  display: flex; align-items: center; gap: 0.6rem; padding: 0.5rem 0.25rem;
  border-bottom: 1px solid var(--glass-border);
}
.cat-tree-row:last-child { border-bottom: none; }
.cat-tree-name { font-weight: 700; flex-shrink: 0; }
.cat-tree-row .form-hint { flex: 1; }
.cat-bulk-checkbox { width: 1rem; height: 1rem; flex-shrink: 0; accent-color: var(--accent-1); cursor: pointer; }
.cat-bulk-checkbox-spacer { width: 1rem; flex-shrink: 0; }
.cat-tree-toggle, .cat-tree-toggle-spacer {
  width: 1.4rem; height: 1.4rem; flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center;
}
.cat-tree-toggle {
  border: none; background: none; color: var(--text-secondary); cursor: pointer; font-size: 0.85rem;
  border-radius: 9999px; transition: transform 0.15s, background-color 0.15s, color 0.15s;
}
.cat-tree-toggle:hover { background: var(--glass-bg); color: var(--text-primary); }
.cat-tree-toggle.expanded { transform: rotate(90deg); }
.cat-tree-children.hidden { display: none; }

/* Bigger, higher-contrast expand/collapse button used specifically on the
   Categories page's own tree (not the compact picker popover above) -- a
   real bordered pill button with a visible resting state instead of a bare
   glyph that only showed color on hover, per feedback that the small
   version was easy to miss and hard to click precisely. */
.cat-tree-expand-btn, .cat-tree-expand-spacer {
  width: 2.2rem; height: 2.2rem; flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center;
}
.cat-tree-expand-btn {
  border: 1px solid var(--glass-border); background: var(--glass-bg-strong); color: var(--text-secondary);
  cursor: pointer; font-size: 1.1rem; border-radius: 9999px;
  transition: transform 0.15s, background-color 0.15s, color 0.15s, border-color 0.15s;
}
.cat-tree-expand-btn:hover { background: var(--glass-bg); color: var(--text-primary); border-color: var(--accent-1); }
.cat-tree-expand-btn.expanded { transform: rotate(90deg); border-color: var(--accent-1); color: var(--accent-1); }
.cat-tree-row[draggable="true"] { cursor: grab; }
.cat-tree-row.dragging { opacity: 0.4; cursor: grabbing; }
.cat-tree-row.drag-over { background: var(--glow-accent); outline: 2px dashed var(--accent-1); outline-offset: -2px; border-radius: 0.6rem; }

/* Reusable category tree picker popover -- replaces flat <select>s on the
   rule modal, category modal's parent picker, and each Inbox row's "Sort
   into..." control, so N-level trees stay collapsible everywhere instead of
   dumping every category flat into one long list. */
.cat-picker-btn { cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; }
.cat-picker-btn::after { content: '\25BE'; opacity: 0.6; font-size: 0.7rem; }
.cat-picker-popover {
  max-height: 320px; overflow-y: auto; padding: 0.4rem; box-shadow: var(--glass-shadow);
  background: var(--surface-opaque);
  backdrop-filter: blur(20px) saturate(160%); -webkit-backdrop-filter: blur(20px) saturate(160%);
}
.cat-picker-row {
  display: flex; align-items: center; gap: 0.5rem; padding: 0.4rem 0.5rem; border-radius: 0.5rem;
  cursor: pointer; font-size: 0.84rem; white-space: nowrap;
}
.cat-picker-row:hover { background: var(--glass-bg); }
.cat-picker-row.active { background: var(--accent-grad); color: #fff; }
.cat-picker-row.unselectable { cursor: pointer; color: var(--text-muted); }
.cat-picker-row.unselectable:hover { background: var(--glass-bg); }
.cat-picker-sep { border-top: 1px solid var(--glass-border); margin: 0.3rem 0; }
.cat-picker-new-row { color: var(--accent-1); font-weight: 600; }
.cat-picker-new-form { display: flex; align-items: center; gap: 0.35rem; padding: 0.25rem 0.25rem; }
.cat-picker-new-form .form-input { flex: 1; font-size: 0.8rem; padding: 0.4rem 0.6rem; }
.cat-picker-new-form .icon-btn { width: 1.9rem; height: 1.9rem; }
.rule-action-badges { display: flex; gap: 0.3rem; }
.rule-action-badge { font-size: 0.62rem; font-weight: 700; padding: 0.1rem 0.4rem; border-radius: 9999px; text-transform: uppercase; }
.rule-action-badge.trash { background: rgba(239,68,68,.15); color: var(--danger); }
.rule-action-badge.seen { background: rgba(99,102,241,.15); color: var(--accent-1); }

/* ===================== Accounts ===================== */
.provider-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 0.6rem; margin-bottom: 1rem; }
.provider-btn { padding: 0.75rem 0.5rem; border-radius: 0.9rem; border: 1px solid var(--glass-border); background: var(--glass-bg-strong); text-align: center; font-size: 0.8rem; font-weight: 700; cursor: pointer; color: var(--text-secondary); }
.provider-btn.selected { border-color: var(--accent-1); color: var(--text-primary); box-shadow: 0 0 0 2px var(--glow-accent); }
.provider-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.account-card { display: flex; align-items: center; gap: 1rem; }
.account-card .account-meta { flex: 1; min-width: 0; }
.account-card .account-email { font-weight: 700; font-size: 0.9rem; }
.account-card .account-sub { font-size: 0.75rem; color: var(--text-muted); }
.banner { border-radius: 0.9rem; padding: 0.75rem 1rem; font-size: 0.82rem; margin-bottom: 1rem; border: 1px solid var(--glass-border); }
.banner.warn { background: rgba(245,158,11,.12); color: #b45309; border-color: rgba(245,158,11,.3); }
.banner.error { background: rgba(239,68,68,.12); color: #b91c1c; border-color: rgba(239,68,68,.3); }
.banner.success { background: rgba(34,197,94,.12); color: #15803d; border-color: rgba(34,197,94,.3); }
body.dark-theme .banner.warn { color: #fbbf24; }
body.dark-theme .banner.error { color: #fca5a5; }
body.dark-theme .banner.success { color: #86efac; }

/* ===================== Settings ===================== */
.palette-swatch-row { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.palette-swatch { width: 2.6rem; height: 2.6rem; border-radius: 50%; cursor: pointer; border: 2px solid transparent; }
.palette-swatch.selected { border-color: var(--text-primary); }
.theme-toggle-row { display: flex; gap: 0.5rem; }
.theme-toggle-row button { flex: 1; }

/* ===================== Modal ===================== */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(5, 5, 15, 0.45); backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center; z-index: 60; padding: 1rem;
}
.modal-box {
  position: relative;
  width: min(92vw, 460px); max-height: 88vh; overflow-y: auto; background: var(--surface-opaque);
  border: 1px solid var(--glass-border); border-radius: 1.5rem; padding: 1.5rem; box-shadow: var(--glass-shadow);
  backdrop-filter: blur(24px) saturate(180%);
}
.modal-box h2 { margin-top: 0; font-size: 1.3rem; }
/* Roomier variant for reading a message -- the default form-width modal is
   too narrow for email content (especially HTML mail with its own layout). */
.modal-box-wide { width: min(94vw, 760px); }
.modal-footer { display: flex; justify-content: flex-end; gap: 0.5rem; margin-top: 1.25rem; }
/* Explicit close control for content modals that don't have a Cancel/Save
   footer to dismiss via (the message-reading modal) -- click-outside still
   works too, but this makes closing discoverable without relying on it. */
.modal-close-x {
  position: absolute; top: 0.9rem; right: 0.9rem; width: 2rem; height: 2rem; border-radius: 9999px;
  border: 1px solid var(--glass-border); background: var(--glass-bg-strong); color: var(--text-secondary);
  font-size: 1.1rem; line-height: 1; cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background-color .12s, color .12s;
}
.modal-close-x:hover { background: var(--glass-bg); color: var(--text-primary); }

/* ===================== Auth gate ===================== */
.auth-gate { position: fixed; inset: 0; z-index: 55; display: flex; align-items: center; justify-content: center; padding: 1rem; }
.auth-card { width: min(92vw, 380px); text-align: center; }
.auth-card .form-field { text-align: left; }
.auth-card .topbar-logo { margin-left: auto; margin-right: auto; cursor: default; }

.empty-state { text-align: center; padding: 2.5rem 1rem; color: var(--text-muted); }
.spinner { width: 1.1rem; height: 1.1rem; border-radius: 50%; border: 2px solid var(--glass-border); border-top-color: var(--accent-1); animation: spin .7s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }
