/* =========================================================================
   oliver chat · 樣式
   設計方向：Minimalism / Swiss —— 內容優先、細邊框、克制的色塊。
   深色是預設（聊天室多半在晚上用），淺色可切換。
   顏色：primary #2563EB（Messenger blue）、accent #059669（online green）。
   ========================================================================= */

:root {
  --font-sans: system-ui, -apple-system, "Segoe UI", "Noto Sans TC", "PingFang TC",
    "Hiragino Sans TC", "Microsoft JhengHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  --dur: 180ms;
  --ease: cubic-bezier(.2, .7, .3, 1);

  --sidebar-w: 276px;
  --members-w: 232px;
}

/* 深色（預設） */
:root,
[data-theme="dark"] {
  --bg: #0b1120;
  --bg-elev: #111a2e;
  --bg-sunk: #080d18;
  --bg-hover: #17233c;
  --border: #1e2a44;
  --border-strong: #2a3a5c;
  --text: #e6ebf5;
  --text-soft: #c3cde0;
  --muted: #8b9ab5;
  --primary: #3b82f6;
  --primary-strong: #2563eb;
  --on-primary: #ffffff;
  --accent: #10b981;
  --danger: #f87171;
  --danger-bg: #3b1116;
  --warn: #fbbf24;
  --warn-bg: #3a2a08;
  --info-bg: #10233f;
  --ring: #60a5fa;
  --shadow: 0 8px 24px rgba(0, 0, 0, .32);
  color-scheme: dark;
}

/* 淺色 */
[data-theme="light"] {
  --bg: #f6f8fc;
  --bg-elev: #ffffff;
  --bg-sunk: #eef2f9;
  --bg-hover: #e9eefa;
  --border: #dfe6f1;
  --border-strong: #c9d4e6;
  --text: #0f172a;
  --text-soft: #334155;
  --muted: #5b6b85;
  --primary: #2563eb;
  --primary-strong: #1d4ed8;
  --on-primary: #ffffff;
  --accent: #059669;
  --danger: #dc2626;
  --danger-bg: #fdecec;
  --warn: #b45309;
  --warn-bg: #fdf3e2;
  --info-bg: #eaf1fe;
  --ring: #2563eb;
  --shadow: 0 8px 24px rgba(15, 23, 42, .08);
  color-scheme: light;
}

* { box-sizing: border-box; }

/* HTML 的 hidden 屬性優先於任何 display 宣告。
   沒有這條，`.record-bar { display:flex }` 之類的規則會讓 hidden 失效 ——
   實際上就是這個 bug 讓「錄音中」的橫條在沒錄音時也顯示出來。 */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { line-height: 1.25; margin: 0; font-weight: 650; letter-spacing: -.01em; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.125rem; }
p { margin: 0; }

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.muted { color: var(--muted); }
.small { font-size: .8125rem; }
.right { text-align: right; }
.row { display: flex; align-items: center; }
.gap { gap: var(--space-3); }
.gap-sm { gap: var(--space-2); }
.wrap { flex-wrap: wrap; }
.end { justify-content: flex-end; }
.block { width: 100%; }

:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ── 按鈕 ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 40px;
  padding: 0 var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: var(--bg-hover);
  color: var(--text);
  font: inherit;
  font-weight: 550;
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease), color var(--dur) var(--ease);
  white-space: nowrap;
}
.btn:hover { background: var(--border); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--primary); color: var(--on-primary); }
.btn.primary:hover { background: var(--primary-strong); }
.btn.ghost { background: transparent; border-color: var(--border-strong); color: var(--text-soft); }
.btn.ghost:hover { background: var(--bg-hover); color: var(--text); }
.btn.danger {
  background: transparent;
  border-color: color-mix(in srgb, var(--danger) 45%, transparent);
  color: var(--danger);
}
.btn.danger:hover { background: var(--danger-bg); color: var(--danger); }
.btn.google {
  background: var(--bg-elev);
  border-color: var(--border-strong);
  color: var(--text);
}
.btn.google:hover { background: var(--bg-hover); }
.btn.disabled, .btn:disabled { opacity: .5; pointer-events: none; }
.btn.block { width: 100%; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 1.05rem;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.icon-btn:hover { background: var(--bg-hover); color: var(--text); }
.icon-btn svg { width: 20px; height: 20px; stroke-width: 1.8; }

/* ── 表單 ─────────────────────────────────────────────────────────────── */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: var(--space-3); }
.field > span, .field > legend { font-size: .8125rem; font-weight: 600; color: var(--text-soft); }
.field.inline { flex-direction: row; align-items: center; gap: var(--space-2); }
.field.inline > span { min-width: 3em; }

input[type="text"], input[type="password"], input[type="email"], input[type="search"],
input:not([type]), textarea, select {
  width: 100%;
  min-height: 42px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-sunk);
  color: var(--text);
  font: inherit;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
input::placeholder, textarea::placeholder { color: var(--muted); opacity: .8; }
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 22%, transparent);
}
textarea { resize: none; }
.hint { color: var(--muted); font-size: .75rem; }
.form-error {
  margin: var(--space-2) 0;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--danger-bg);
  color: var(--danger);
  font-size: .875rem;
  border: 1px solid color-mix(in srgb, var(--danger) 35%, transparent);
}
.checkbox { display: flex; align-items: center; gap: var(--space-2); font-size: .875rem; color: var(--text-soft); }
.checkbox input { width: 18px; height: 18px; accent-color: var(--primary); }
.radio { display: flex; align-items: center; gap: var(--space-2); padding: 8px 0; font-size: .875rem; }
.radio input { accent-color: var(--primary); }
fieldset.field { border: none; padding: 0; margin: 0 0 var(--space-3); }

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-5);
}
.card.narrow { max-width: 460px; width: 100%; }

/* ── 登入 / 註冊 ──────────────────────────────────────────────────────── */
.auth-page {
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  background:
    radial-gradient(1200px 600px at 10% -10%, color-mix(in srgb, var(--primary) 18%, transparent), transparent 60%),
    radial-gradient(900px 500px at 100% 100%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 55%),
    var(--bg);
}
.auth-brand {
  padding: clamp(28px, 5vw, 72px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-6);
}
.auth-brand-copy h1 {
  font-size: clamp(2rem, 3.6vw, 3rem);
  letter-spacing: -.03em;
  line-height: 1.15;
}
.auth-brand-copy .muted { margin-top: var(--space-3); font-size: 1rem; }
.auth-points {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-2);
  color: var(--text-soft);
  font-size: .9rem;
}
.auth-points li::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 10px;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: middle;
}
.auth-panel {
  display: grid;
  place-items: center;
  padding: clamp(20px, 4vw, 56px);
}
.auth-card { width: min(420px, 100%); box-shadow: var(--shadow); }
.auth-card h2 { font-size: 1.35rem; margin-bottom: var(--space-1); }
.auth-card > .muted { margin-bottom: var(--space-5); }
.auth-switch { margin-top: var(--space-4); text-align: center; color: var(--muted); font-size: .875rem; }
.divider {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: var(--space-4) 0;
  color: var(--muted);
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.divider::before, .divider::after { content: ""; height: 1px; flex: 1; background: var(--border); }

/* ── 品牌 ─────────────────────────────────────────────────────────────── */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  letter-spacing: -.01em;
}
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  position: relative;
  flex: none;
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 7px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, .85);
  border-right-color: transparent;
  transform: rotate(-30deg);
}

/* ── 聊天主體 ─────────────────────────────────────────────────────────── */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--members-w);
  height: 100dvh;
  overflow: hidden;
}

.sidebar {
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--bg-elev);
  border-right: 1px solid var(--border);
}
.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-4) var(--space-3);
}
.sidebar-section { padding: 0 var(--space-3) var(--space-3); flex: 1; min-height: 0; display: flex; flex-direction: column; }
.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-2);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted);
}
.room-list {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-bottom: var(--space-2);
}
.room-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-soft);
  font-size: .9rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.room-item:hover { background: var(--bg-hover); color: var(--text); text-decoration: none; }
.room-item.active { background: color-mix(in srgb, var(--primary) 16%, transparent); color: var(--text); border-color: color-mix(in srgb, var(--primary) 30%, transparent); }
.room-item .hash { color: var(--muted); font-weight: 700; flex: none; }
.room-item .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.room-item .badge-dot {
  min-width: 20px;
  padding: 0 6px;
  height: 18px;
  border-radius: 9px;
  background: var(--accent);
  color: #04120c;
  font-size: .6875rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}
.room-item .lock { color: var(--muted); font-size: .75rem; }

.sidebar-foot {
  border-top: 1px solid var(--border);
  padding: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.user-chip { display: flex; align-items: center; gap: var(--space-2); min-width: 0; flex: 1; }
.user-chip .meta { min-width: 0; }
.user-chip .name { font-size: .875rem; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-chip .role { font-size: .6875rem; color: var(--muted); }

.avatar {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  flex: none;
  display: grid;
  place-items: center;
  font-size: .875rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), color-mix(in srgb, var(--primary) 40%, var(--accent)));
  overflow: hidden;
  user-select: none;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar-lg { width: 72px; height: 72px; border-radius: 18px; font-size: 1.6rem; }
.avatar-sm { width: 26px; height: 26px; border-radius: 8px; font-size: .7rem; }

/* 聊天欄 */
.chat {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  background: var(--bg);
}
.chat-head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-elev) 65%, transparent);
  backdrop-filter: blur(8px);
  min-height: 64px;
}
.chat-title { min-width: 0; flex: 1; }
.chat-title h1 { font-size: 1.0625rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-title p { font-size: .8125rem; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-head-right { display: flex; align-items: center; gap: var(--space-2); }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg-hover);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: .75rem;
  font-weight: 600;
  white-space: nowrap;
}
.pill::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
}

.messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-4) var(--space-5) var(--space-5);
  scroll-behavior: smooth;
  overscroll-behavior: contain;
}
.messages-loading { color: var(--muted); text-align: center; padding: var(--space-6); }

.msg-group { display: flex; gap: var(--space-3); padding: 6px 0; }
.msg-group + .msg-group { margin-top: var(--space-2); }
.msg-body { min-width: 0; flex: 1; }
.msg-meta { display: flex; align-items: baseline; gap: var(--space-2); margin-bottom: 2px; }
.msg-meta .who { font-weight: 650; font-size: .9rem; color: var(--text); }
.msg-meta .role-tag {
  font-size: .625rem;
  font-weight: 700;
  letter-spacing: .04em;
  padding: 1px 6px;
  border-radius: 5px;
  background: color-mix(in srgb, var(--primary) 20%, transparent);
  color: var(--primary);
  text-transform: uppercase;
}
.msg-meta .role-tag.super { background: color-mix(in srgb, var(--warn) 22%, transparent); color: var(--warn); }
.msg-meta .role-tag.mod { background: color-mix(in srgb, var(--accent) 20%, transparent); color: var(--accent); }
.msg-meta time { font-size: .6875rem; color: var(--muted); }
.msg-text { white-space: pre-wrap; overflow-wrap: anywhere; color: var(--text-soft); }
.msg-text a { color: var(--primary); }
.msg.deleted .msg-text { color: var(--muted); font-style: italic; }
.msg-actions {
  opacity: 0;
  display: flex;
  gap: 4px;
  margin-left: auto;
  transition: opacity var(--dur) var(--ease);
}
.msg-group:hover .msg-actions, .msg-group:focus-within .msg-actions { opacity: 1; }
.msg-actions button {
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: .75rem;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 5px;
}
.msg-actions button:hover { background: var(--bg-hover); color: var(--text); }
.msg-reply {
  border-left: 3px solid var(--border-strong);
  padding: 2px 0 2px 10px;
  margin-bottom: 4px;
  font-size: .8125rem;
  color: var(--muted);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.msg-reply strong { color: var(--text-soft); font-weight: 600; }

.attachments { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: 6px; }
.att-image, .att-video {
  max-width: min(360px, 100%);
  max-height: 320px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: block;
  background: var(--bg-sunk);
  cursor: zoom-in;
}
.att-video { cursor: default; }
.att-audio { width: min(320px, 100%); }
.att-file {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-elev);
  color: var(--text-soft);
  font-size: .8125rem;
  max-width: 100%;
}
.att-file:hover { background: var(--bg-hover); text-decoration: none; }
.att-file .fname { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.att-file .fsize { color: var(--muted); flex: none; }

.day-sep {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: var(--space-5) 0 var(--space-3);
  color: var(--muted);
  font-size: .75rem;
  font-weight: 600;
}
.day-sep::before, .day-sep::after { content: ""; height: 1px; flex: 1; background: var(--border); }

/* 輸入區 */
.composer {
  border-top: 1px solid var(--border);
  padding: var(--space-3) var(--space-5) var(--space-4);
  background: var(--bg-elev);
  position: relative;
}
.composer-row { display: flex; align-items: flex-end; gap: var(--space-2); }
#composer-input {
  flex: 1;
  min-height: 44px;
  max-height: 160px;
  padding: 11px 14px;
  border-radius: var(--radius);
  background: var(--bg-sunk);
  line-height: 1.5;
  resize: none;
}
.composer-actions { display: flex; align-items: center; gap: 2px; }
.composer-actions .btn { min-height: 44px; }

.attachment-preview { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-2); }
.preview-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 30px 6px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-sunk);
  font-size: .75rem;
  max-width: 260px;
}
.preview-item img { width: 40px; height: 40px; object-fit: cover; border-radius: 6px; }
.preview-item .pname { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.preview-item .remove {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: .875rem;
  padding: 4px;
}
.preview-item .remove:hover { color: var(--danger); }

.emoji-panel {
  position: absolute;
  bottom: calc(100% - 6px);
  right: var(--space-5);
  width: min(380px, calc(100vw - 32px));
  max-height: 320px;
  overflow-y: auto;
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: var(--space-3);
  z-index: 20;
}
.emoji-tabs { display: flex; gap: 4px; margin-bottom: var(--space-2); flex-wrap: nowrap; overflow-x: auto; padding-bottom: 2px; }
.emoji-tab {
  flex: none;
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  font-size: .75rem;
  padding: 4px 8px;
  border-radius: 6px;
  cursor: pointer;
}
.emoji-tab.active, .emoji-tab:hover { background: var(--bg-hover); color: var(--text); }
.emoji-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(34px, 1fr)); gap: 2px; }
.emoji-grid button {
  border: none;
  background: transparent;
  font-size: 1.25rem;
  line-height: 1;
  padding: 6px;
  border-radius: 6px;
  cursor: pointer;
}
.emoji-grid button:hover { background: var(--bg-hover); }

.record-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-2);
  padding: 10px 12px;
  border-radius: var(--radius);
  background: var(--danger-bg);
  border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent);
  font-size: .875rem;
}
.rec-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--danger);
  animation: pulse 1.2s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .25; } }

.mute-bar {
  margin: 0 var(--space-5) var(--space-2);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--warn-bg);
  color: var(--warn);
  font-size: .8125rem;
  border: 1px solid color-mix(in srgb, var(--warn) 30%, transparent);
}

/* 成員欄 */
.members {
  background: var(--bg-elev);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.members-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--border);
}
.members-head h2 { font-size: .8125rem; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.member-list { list-style: none; margin: 0; padding: var(--space-2); overflow-y: auto; flex: 1; }
.member-list li { display: flex; align-items: center; gap: var(--space-2); padding: 7px 8px; border-radius: var(--radius-sm); }
.member-list li:hover { background: var(--bg-hover); }
.member-list .m-name { font-size: .875rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }
.member-list .m-role { font-size: .625rem; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.online-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); flex: none; }

/* 公告橫幅 */
.banner-stack { display: flex; flex-direction: column; gap: 1px; }
.banner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 10px var(--space-5);
  font-size: .8125rem;
  background: var(--info-bg);
  border-bottom: 1px solid var(--border);
  color: var(--text-soft);
}
.banner.level-warn { background: var(--warn-bg); color: var(--warn); }
.banner.level-critical { background: var(--danger-bg); color: var(--danger); }
.banner .b-title { font-weight: 650; }
.banner .b-body { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.banner .b-close { border: none; background: transparent; color: inherit; cursor: pointer; opacity: .7; font-size: 1rem; }
.banner .b-close:hover { opacity: 1; }

/* ── 一般頁面 ─────────────────────────────────────────────────────────── */
.page { min-height: 100dvh; background: var(--bg); }
.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) clamp(16px, 4vw, 40px);
  border-bottom: 1px solid var(--border);
  background: var(--bg-elev);
  position: sticky;
  top: 0;
  z-index: 10;
}
.page-body { max-width: 1080px; margin: 0 auto; padding: clamp(20px, 4vw, 40px) clamp(16px, 4vw, 40px) 80px; }
.narrow-body { max-width: 720px; }
.page-title { font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: var(--space-2); }
.page-body > .muted { margin-bottom: var(--space-5); }

.announcement-list { display: grid; gap: var(--space-3); margin-top: var(--space-4); }
.announcement { border-left: 4px solid var(--primary); }
.announcement.level-warn { border-left-color: var(--warn); }
.announcement.level-critical { border-left-color: var(--danger); }
.announcement-head { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; margin-bottom: var(--space-2); }
.announcement-head h2 { font-size: 1.0625rem; }
.announcement-body { white-space: pre-wrap; color: var(--text-soft); margin-bottom: var(--space-3); }
.badge {
  font-size: .6875rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--bg-hover);
  color: var(--muted);
  letter-spacing: .03em;
}
.badge.level-info { background: var(--info-bg); color: var(--primary); }
.badge.level-warn { background: var(--warn-bg); color: var(--warn); }
.badge.level-critical { background: var(--danger-bg); color: var(--danger); }
.badge.pinned { background: color-mix(in srgb, var(--primary) 18%, transparent); color: var(--primary); }
.badge.role-super { background: var(--warn-bg); color: var(--warn); }
.badge.role-admin { background: color-mix(in srgb, var(--primary) 18%, transparent); color: var(--primary); }
.badge.role-mod { background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--accent); }

.profile-card { display: flex; align-items: center; gap: var(--space-4); margin-bottom: var(--space-4); }
.profile-main h1 { font-size: 1.5rem; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: var(--space-3); margin-bottom: var(--space-5); }
.stat { display: flex; flex-direction: column; gap: 2px; padding: var(--space-4); }
.stat strong { font-size: 1.35rem; letter-spacing: -.02em; }
.stat span { font-size: .75rem; color: var(--muted); }

.center-page { min-height: 100dvh; display: grid; place-items: center; padding: var(--space-5); }
.error-code { font-size: 3rem; font-weight: 800; letter-spacing: -.04em; color: var(--primary); line-height: 1; margin-bottom: var(--space-3); }
.center-page .card h1 { margin-bottom: var(--space-2); }
.center-page .card .muted { margin-bottom: var(--space-4); }

/* ── 管理後台 ─────────────────────────────────────────────────────────── */
.tabs { display: flex; gap: var(--space-1); border-bottom: 1px solid var(--border); margin-bottom: var(--space-4); overflow-x: auto; }
.tab {
  border: none;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-weight: 600;
  font-size: .875rem;
  padding: 10px 14px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-panel { display: flex; flex-direction: column; gap: var(--space-3); }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-elev); }
.table { width: 100%; border-collapse: collapse; font-size: .875rem; }
.table th, .table td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table th { font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 700; background: var(--bg-sunk); }
.table tr:last-child td { border-bottom: none; }
.table .u-cell { display: flex; align-items: center; gap: var(--space-2); }
.table .u-name { font-weight: 600; }
.table .u-sub { font-size: .75rem; color: var(--muted); }
.table .actions { display: flex; gap: 6px; justify-content: flex-end; flex-wrap: wrap; }
.table .btn { min-height: 32px; padding: 0 10px; font-size: .75rem; }
.input.select { min-height: 38px; padding: 6px 10px; }

/* 管理頁：搜尋列不要每個控制項各佔一行 */
#tab-users .row { flex-wrap: nowrap; }
#user-search { flex: 1; min-width: 0; }
#user-status { width: 150px; flex: none; }
.admin-page .stat-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 900px) {
  .admin-page .stat-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  #tab-users .row { flex-wrap: wrap; }
  #user-status { width: 100%; }
}

.audit-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.audit-list li {
  display: flex;
  gap: var(--space-3);
  align-items: baseline;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elev);
  font-size: .8125rem;
}
.audit-list .a-time { color: var(--muted); font-variant-numeric: tabular-nums; flex: none; }
.audit-list .a-action { font-weight: 650; }
.audit-list .a-detail { color: var(--muted); overflow-wrap: anywhere; }

/* ── Modal ────────────────────────────────────────────────────────────── */
.modal {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--bg-elev);
  color: var(--text);
  padding: 0;
  width: min(440px, calc(100vw - 32px));
  box-shadow: var(--shadow);
}
.modal::backdrop { background: rgba(4, 8, 16, .6); backdrop-filter: blur(2px); }
.modal-card { padding: var(--space-5); display: flex; flex-direction: column; }
.modal-card h2 { margin-bottom: var(--space-3); }

/* ── 響應式 ───────────────────────────────────────────────────────────── */
.mobile-only { display: none; }

/* 抽屜遮罩：點一下就關，比「再點一次漢堡」直覺 */
.scrim { position: fixed; inset: 0; background: rgba(4, 8, 16, .55); z-index: 45; }
@media (min-width: 861px) { .scrim { display: none !important; } }

@media (max-width: 1080px) {
  .app { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
  .members {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(300px, 86vw);
    transform: translateX(100%);
    transition: transform var(--dur) var(--ease);
    z-index: 40;
    box-shadow: var(--shadow);
  }
  .app.members-open .members { transform: translateX(0); }
}

@media (max-width: 860px) {
  .app { grid-template-columns: minmax(0, 1fr); }
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(300px, 86vw);
    transform: translateX(-100%);
    transition: transform var(--dur) var(--ease);
    z-index: 50;
    box-shadow: var(--shadow);
  }
  .app.sidebar-open .sidebar { transform: translateX(0); }
  .mobile-only { display: inline-flex; }
  .messages { padding: var(--space-3) var(--space-3) var(--space-4); }
  .composer { padding: var(--space-2) var(--space-3) calc(var(--space-3) + env(safe-area-inset-bottom)); }
  .sidebar-foot { padding-bottom: calc(var(--space-3) + env(safe-area-inset-bottom)); }
  .chat-head { padding: var(--space-2) var(--space-3); }
  .composer-actions .icon-btn { width: 36px; height: 36px; }
  .auth-page { grid-template-columns: 1fr; }
  .auth-brand { padding-bottom: 0; gap: var(--space-4); }
  .auth-brand-copy h1 { font-size: 1.9rem; }
  .auth-points { display: none; }
  .auth-panel { padding-top: var(--space-5); }
}

@media (max-width: 560px) {
  .att-image, .att-video { max-width: 100%; }
  .page-head { padding: var(--space-3) var(--space-4); }
  .table th:nth-child(5), .table td:nth-child(5) { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

/* 捲軸 */
* { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 8px; border: 3px solid transparent; background-clip: content-box; }
*::-webkit-scrollbar-thumb:hover { background: var(--muted); background-clip: content-box; }

/* 附件圖示（inline SVG，不用 emoji 當圖示） */
.att-ico { display: inline-flex; width: 18px; height: 18px; color: var(--muted); flex: none; }
.att-ico svg { width: 18px; height: 18px; }

/* 隱私權頁的清單 */
.privacy-list { margin: 0 0 var(--space-4); padding-left: 20px; color: var(--text-soft); }
.privacy-list li { margin-bottom: 8px; }
.privacy-list strong { color: var(--text); }