/* ============================================================
   X-ART Chat — Dual theme (light default · dark glass)
============================================================ */
/* 防国产浏览器（QQ/UC/360/微信/华为）系统暗模式自动反色 */
:root { color-scheme: light; }
html[data-theme="dark"] { color-scheme: dark; }

:root,
[data-theme="light"] {
  --bg-base: #fafafa;
  --bg-deep: #f5f5f7;
  --surface: #ffffff;
  --surface-soft: #f9fafb;
  --surface-hover: #f3f4f6;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --text: #0f172a;
  --text-muted: #64748b;
  --text-dim: #94a3b8;
  --primary: #7c3aed;
  --primary-hover: #6d28d9;
  --primary-deep: #5b21b6;
  --primary-soft: #f5f3ff;
  --accent-purple: #a855f7;
  --accent-blue: #3b82f6;
  --accent-cyan: #0891b2;
  --accent-pink: #ec4899;
  --accent-amber: #d97706;
  --accent-emerald: #059669;
  --danger: #dc2626;
  --gradient-primary: linear-gradient(135deg, #7c3aed 0%, #3b82f6 100%);
  --gradient-user: linear-gradient(135deg, #ede9fe 0%, #dbeafe 100%);
  --gradient-page: radial-gradient(circle at 0% 0%, rgba(124,58,237,0.06) 0%, transparent 40%),
                   radial-gradient(circle at 100% 100%, rgba(59,130,246,0.06) 0%, transparent 40%);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow: 0 4px 14px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
  --shadow-glow-primary: 0 4px 16px rgba(124, 58, 237, 0.25);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --blur: 12px;
  --user-bubble-text: #1e1b4b;
  --code-bg: #f6f8fa;
  --code-border: #e5e7eb;
  --kbd-bg: #f1f5f9;
  --kbd-text: #64748b;
}

[data-theme="dark"] {
  --bg-base: #0a0a14;
  --bg-deep: #050510;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-soft: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.10);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --primary: #818cf8;
  --primary-hover: #a5b4fc;
  --primary-deep: #6366f1;
  --primary-soft: rgba(99,102,241,0.12);
  --accent-purple: #a855f7;
  --accent-blue: #60a5fa;
  --accent-cyan: #22d3ee;
  --accent-pink: #ec4899;
  --accent-amber: #fbbf24;
  --accent-emerald: #34d399;
  --danger: #f87171;
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --gradient-user: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  --gradient-page: none;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.18);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.36);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
  --shadow-glow-primary: 0 8px 32px rgba(99, 102, 241, 0.35);
  --blur: 18px;
  --user-bubble-text: #ffffff;
  --code-bg: rgba(0, 0, 0, 0.35);
  --code-border: rgba(255, 255, 255, 0.08);
  --kbd-bg: rgba(255, 255, 255, 0.08);
  --kbd-text: #cbd5e1;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: "Inter", -apple-system, "PingFang SC", "Helvetica Neue", "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow: hidden;
  position: relative;
}
[data-theme="dark"] body { background: var(--bg-deep); }
body::before, body::after, .orb-extra { display: none; }

[data-theme="light"] body::before,
:root body::before {
  content: ''; display: block; position: fixed; inset: 0;
  background: var(--gradient-page); pointer-events: none; z-index: 0;
}

[data-theme="dark"] body::before, [data-theme="dark"] body::after {
  content: ''; display: block; position: fixed; border-radius: 50%;
  filter: blur(120px); opacity: 0.55; pointer-events: none; z-index: 0;
}
[data-theme="dark"] body::before {
  width: 520px; height: 520px;
  background: radial-gradient(circle, #6366f1 0%, transparent 70%);
  top: -120px; left: -120px;
  animation: drift1 20s ease-in-out infinite;
}
[data-theme="dark"] body::after {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #a855f7 0%, transparent 70%);
  bottom: -180px; right: -180px;
  animation: drift2 24s ease-in-out infinite;
}
[data-theme="dark"] .orb-extra {
  display: block; position: fixed; width: 380px; height: 380px;
  border-radius: 50%; background: radial-gradient(circle, #ec4899 0%, transparent 70%);
  filter: blur(120px); opacity: 0.32; top: 50%; left: 60%;
  pointer-events: none; z-index: 0;
  animation: drift3 28s ease-in-out infinite;
}
@keyframes drift1 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(60px, 80px); } }
@keyframes drift2 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(-80px, -60px); } }
@keyframes drift3 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(-60px, -40px); } }

button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font: inherit; outline: none; color: inherit; }
.hidden { display: none !important; }
.link { color: var(--primary); text-decoration: none; cursor: pointer; }
.link:hover { color: var(--primary-hover); }
svg { display: block; }

/* ===== kbd ===== */
.kbd-hint, .kbd-inline {
  display: inline-block;
  padding: 1px 6px;
  background: var(--kbd-bg);
  color: var(--kbd-text);
  border-radius: 5px;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.5px;
}
.kbd-hint { margin-left: auto; }

/* ===== Buttons ===== */
.btn {
  border-radius: var(--radius);
  padding: 10px 18px;
  font-weight: 500;
  transition: all 180ms ease;
  border: 1px solid transparent;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--gradient-primary); color: #fff; box-shadow: var(--shadow-glow-primary); }
.btn-primary:hover { box-shadow: 0 8px 24px rgba(124,58,237,0.4); transform: translateY(-1px); }
.btn-secondary { background: var(--surface); border-color: var(--border); color: var(--text); }
.btn-secondary:hover { background: var(--surface-hover); border-color: var(--border-strong); }
.btn-block { width: 100%; }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px;
  border-radius: 8px;
  color: var(--text-muted);
  transition: all 160ms ease;
}
.icon-btn:hover { background: var(--surface-hover); color: var(--text); }
.icon-btn.ghost { background: transparent; }

/* ===== App layout ===== */
.app { display: flex; height: 100vh; position: relative; z-index: 1; }
.sidebar {
  width: 264px; flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  padding: 18px 14px 14px;
  gap: 10px;
}
[data-theme="dark"] .sidebar {
  background: rgba(10, 10, 20, 0.55);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
}

.brand { padding: 4px 6px; }
.brand-row { display: flex; align-items: center; gap: 12px; }
.brand-icon {
  flex-shrink: 0;
  background: var(--gradient-primary);
  width: 36px; height: 36px;
  border-radius: 10px;
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff;
  box-shadow: var(--shadow-glow-primary);
}
.brand-icon svg { width: 20px; height: 20px; }
.brand-title { font-size: 16px; font-weight: 700; color: var(--text); letter-spacing: 0.2px; }
[data-theme="dark"] .brand-title {
  background: linear-gradient(135deg, #f1f5f9 0%, #c7d2fe 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.brand-sub { font-size: 11px; color: var(--text-muted); margin-top: 2px; }

.new-chat-btn {
  display: flex; align-items: center; gap: 8px;
  background: var(--gradient-primary);
  color: #fff;
  padding: 10px 12px;
  border-radius: var(--radius);
  font-weight: 500; font-size: 13px;
  box-shadow: var(--shadow-glow-primary);
  transition: all 180ms ease;
  border: 1px solid transparent;
}
.new-chat-btn span:first-of-type { flex: 1; text-align: left; }
.new-chat-btn .kbd-hint { background: rgba(255,255,255,0.2); color: rgba(255,255,255,0.85); }
.new-chat-btn:hover { box-shadow: 0 8px 24px rgba(124,58,237,0.4); transform: translateY(-1px); }

.cmd-trigger {
  display: flex; align-items: center; gap: 8px;
  background: var(--surface-soft);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 8px 10px;
  border-radius: var(--radius);
  font-size: 12px;
  transition: all 160ms ease;
}
.cmd-trigger span:first-of-type { flex: 1; text-align: left; }
.cmd-trigger:hover { background: var(--surface-hover); color: var(--text); }
[data-theme="dark"] .cmd-trigger { background: rgba(255,255,255,0.04); }

/* ===== Sessions (grouped) ===== */
.sessions {
  flex: 1; overflow-y: auto;
  display: flex; flex-direction: column; gap: 4px;
  padding: 4px 2px; margin-right: -4px; padding-right: 6px;
}
.session-group { margin-top: 8px; }
.session-group:first-child { margin-top: 0; }
.session-group-label {
  font-size: 10px; font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-dim);
  padding: 6px 8px 4px;
}
.session-item {
  position: relative; background: transparent;
  border: 1px solid transparent; border-radius: var(--radius);
  padding: 11px 13px; cursor: pointer;
  transition: all 160ms ease;
}
.session-item:hover { background: var(--surface-hover); }
.session-item:hover .session-del { opacity: 1; }
.session-item.active {
  background: var(--primary-soft);
  border-color: rgba(124, 58, 237, 0.18);
}
[data-theme="dark"] .session-item.active {
  background: rgba(255, 255, 255, 0.07);
  border-color: var(--border-strong);
  box-shadow: inset 2px 0 0 var(--primary);
}
.session-title {
  font-size: 13px; font-weight: 500;
  color: var(--text); line-height: 1.4;
  word-break: break-all; padding-right: 22px;
  display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical;
  overflow: hidden;
}
.session-meta {
  display: flex; justify-content: space-between;
  font-size: 11px; color: var(--text-dim); margin-top: 3px;
}
.session-del {
  position: absolute; top: 8px; right: 8px;
  width: 22px; height: 22px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 6px;
  color: var(--text-dim);
  opacity: 0; transition: all 160ms ease;
}
.session-del:hover { background: rgba(220, 38, 38, 0.1); color: var(--danger); }

/* ===== User card ===== */
.user-card {
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius); padding: 12px;
}
[data-theme="dark"] .user-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
}
.user-row { display: flex; align-items: center; gap: 10px; }
.user-avatar {
  width: 36px; height: 36px; flex-shrink: 0;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: 14px;
  box-shadow: var(--shadow-glow-primary);
}
.user-info { flex: 1; min-width: 0; }
.user-name {
  font-weight: 600; font-size: 13px; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.balance-value { font-size: 13px; font-weight: 600; color: var(--accent-emerald); margin-top: 2px; }
.balance-value.low { color: var(--danger); }
.redeem-btn {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  width: 100%; margin-top: 12px; padding: 9px;
  background: var(--primary-soft);
  border: 1px solid rgba(124, 58, 237, 0.18);
  color: var(--primary);
  border-radius: 10px;
  font-size: 12px; font-weight: 500;
  transition: all 160ms ease;
}
.redeem-btn:hover { background: #ede9fe; border-color: rgba(124, 58, 237, 0.32); }
[data-theme="dark"] .redeem-btn { background: rgba(99,102,241,0.12); border-color: rgba(99,102,241,0.25); color: var(--primary-hover); }
[data-theme="dark"] .redeem-btn:hover { background: rgba(99,102,241,0.22); }

.aff-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; margin-top: 8px; padding: 10px;
  background: linear-gradient(135deg, #f59e0b 0%, #ec4899 100%);
  color: #fff;
  border: 0;
  border-radius: 10px;
  font-size: 12px; font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(236, 72, 153, 0.25);
  transition: transform 120ms ease, box-shadow 160ms ease;
}
.aff-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(236, 72, 153, 0.4); }
.aff-btn:active { transform: translateY(0); }
.aff-btn-tag {
  font-size: 10px; font-weight: 500;
  padding: 2px 7px;
  background: rgba(255,255,255,0.22);
  border-radius: 999px;
  letter-spacing: 0.3px;
}

/* ===== Main ===== */
.main {
  flex: 1;
  display: flex; flex-direction: column;
  background: var(--bg-base); min-width: 0;
}
[data-theme="dark"] .main {
  background: rgba(10, 10, 20, 0.3);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
}
.main-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
[data-theme="dark"] .main-header { background: transparent; }
.title { font-size: 15px; font-weight: 600; color: var(--text); }
.header-actions { display: flex; gap: 4px; align-items: center; }

.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 8px;
  color: var(--text-muted);
  transition: all 160ms ease;
}
.theme-toggle:hover { background: var(--surface-hover); color: var(--primary); transform: rotate(15deg); }

/* ===== Main body (messages + gallery) ===== */
.main-body { flex: 1; display: flex; min-height: 0; }
.gallery {
  width: 0; flex-shrink: 0;
  border-left: 1px solid var(--border);
  background: var(--surface-soft);
  display: flex; flex-direction: column;
  transition: width 220ms ease;
  overflow: hidden;
}
[data-theme="dark"] .gallery { background: rgba(10,10,20,0.4); }
.app.with-gallery .gallery { width: 280px; }
.gallery-head {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 13px; font-weight: 600;
  color: var(--text);
  display: flex; justify-content: space-between; align-items: center;
}
.gallery-count {
  background: var(--primary-soft); color: var(--primary);
  font-size: 11px; padding: 2px 8px; border-radius: 10px;
}
[data-theme="dark"] .gallery-count { background: rgba(99,102,241,0.18); color: var(--primary-hover); }
.gallery-grid {
  flex: 1; overflow-y: auto;
  padding: 12px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
}
.gallery-grid img {
  width: 100%; aspect-ratio: 1; object-fit: cover;
  border-radius: 8px; cursor: zoom-in;
  border: 1px solid var(--border);
  transition: transform 160ms ease, box-shadow 160ms ease;
}
.gallery-grid img:hover { transform: scale(1.04); box-shadow: var(--shadow); }

/* ===== Messages ===== */
.messages {
  flex: 1; overflow-y: auto;
  padding: 24px 28px;
  display: flex; flex-direction: column; gap: 16px;
  scroll-behavior: smooth;
}
.msg {
  position: relative;
  display: flex; flex-direction: column;
  max-width: 78%;
  animation: msg-in 280ms cubic-bezier(0.21, 1, 0.4, 1);
}
@keyframes msg-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.msg.user { align-self: flex-end; align-items: flex-end; }
.msg.assistant { align-self: flex-start; align-items: flex-start; }
.msg-bubble {
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  line-height: 1.65;
  word-break: break-word;
}

/* 长内容自动折叠 */
.msg-bubble.collapsible { position: relative; }
.msg-bubble.collapsible.collapsed {
  max-height: 320px;
  overflow: hidden;
}
.msg-bubble.collapsible.collapsed::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 80px;
  background: linear-gradient(to bottom, rgba(255,255,255,0) 0%, var(--surface) 100%);
  pointer-events: none;
}
.msg.user .msg-bubble.collapsible.collapsed::after {
  /* 用户气泡是紫色背景，渐变到对应颜色 */
  background: linear-gradient(to bottom, rgba(124,58,237,0) 0%, var(--primary) 100%);
}
[data-theme="dark"] .msg-bubble.collapsible.collapsed::after {
  background: linear-gradient(to bottom, rgba(20,20,35,0) 0%, var(--surface) 100%);
}
.msg-expand-toggle {
  display: inline-flex; align-items: center;
  margin-top: 4px;
  padding: 4px 12px;
  font-size: 12px;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: all 120ms ease;
}
.msg-expand-toggle:hover { background: var(--surface-hover); border-color: var(--primary); }
[data-theme="dark"] .msg-expand-toggle { background: rgba(99,102,241,0.14); border-color: rgba(99,102,241,0.32); color: var(--primary-hover); }
.msg-bubble p { margin: 0.4em 0; }
.msg-bubble p:first-child { margin-top: 0; }
.msg-bubble p:last-child { margin-bottom: 0; }
.msg-bubble ul, .msg-bubble ol { margin: 0.5em 0; padding-left: 1.4em; }
.msg-bubble li { margin: 0.2em 0; }
.msg-bubble h1, .msg-bubble h2, .msg-bubble h3 { margin: 0.7em 0 0.4em; font-weight: 600; }
.msg-bubble h1 { font-size: 1.2em; } .msg-bubble h2 { font-size: 1.12em; } .msg-bubble h3 { font-size: 1.06em; }
.msg-bubble blockquote {
  margin: 0.5em 0; padding: 0.4em 0.8em;
  border-left: 3px solid var(--primary);
  background: var(--primary-soft);
  border-radius: 0 6px 6px 0;
  color: var(--text);
}
[data-theme="dark"] .msg-bubble blockquote { background: rgba(255,255,255,0.04); }
.msg-bubble code:not(pre code) {
  padding: 1px 6px;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 5px;
  font-family: "JetBrains Mono", "Fira Code", "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88em;
  color: var(--accent-pink);
}
[data-theme="dark"] .msg-bubble code:not(pre code) { color: var(--accent-amber); }
.code-block {
  position: relative;
  margin: 8px 0;
  border-radius: 10px;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  overflow: hidden;
}
.code-block-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 6px 10px;
  background: rgba(0,0,0,0.04);
  border-bottom: 1px solid var(--code-border);
  font-size: 11px;
  color: var(--text-muted);
}
[data-theme="dark"] .code-block-head { background: rgba(255,255,255,0.03); }
.code-copy {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 8px; border-radius: 5px;
  font-size: 11px; color: var(--text-muted);
  background: transparent;
  transition: all 120ms ease;
}
.code-copy:hover { background: var(--surface-hover); color: var(--text); }
.code-copy.copied { color: var(--accent-emerald); }
.code-block pre {
  margin: 0; padding: 12px 14px;
  overflow-x: auto;
  font-family: "JetBrains Mono", "Fira Code", "SF Mono", Menlo, Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.55;
}

.msg.user .msg-bubble {
  background: var(--gradient-user);
  color: var(--user-bubble-text);
  border-bottom-right-radius: 4px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(124, 58, 237, 0.12);
  white-space: pre-wrap;
}
[data-theme="dark"] .msg.user .msg-bubble { border: none; box-shadow: 0 4px 16px rgba(99,102,241,0.32); }
.msg.assistant .msg-bubble {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  border-bottom-left-radius: 4px;
  box-shadow: var(--shadow-sm);
}
[data-theme="dark"] .msg.assistant .msg-bubble {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
}
.msg.assistant .msg-bubble.err { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
[data-theme="dark"] .msg.assistant .msg-bubble.err { background: rgba(248,113,113,0.12); border-color: rgba(248,113,113,0.4); color: #fca5a5; }
.msg-meta { font-size: 11px; color: var(--text-dim); margin-top: 6px; }
.msg-image {
  max-width: 100%;
  border-radius: var(--radius);
  margin-top: 8px; cursor: zoom-in;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
/* Hover toolbar on assistant messages */
.msg-tools {
  display: flex; gap: 4px;
  margin-top: 4px;
  opacity: 0;
  transition: opacity 160ms ease;
}
.msg.assistant:hover .msg-tools { opacity: 1; }
.msg-tools .tbtn {
  display: inline-flex; align-items: center; gap: 3px;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 11px;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: all 120ms ease;
}
.msg-tools .tbtn:hover { background: var(--surface-hover); color: var(--text); }
.msg-tools .tbtn.copied { color: var(--accent-emerald); border-color: var(--accent-emerald); }

/* 截断提示条：始终显示（不依赖 hover），与气泡同级 */
.msg-truncated-hint {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
  padding: 7px 10px 7px 12px;
  font-size: 12px;
  line-height: 1.4;
  color: #92400e;
  background: #fef3c7;
  border: 1px solid #fcd34d;
  border-radius: 8px;
  max-width: 100%;
}
.msg-truncated-text { white-space: normal; }
.msg-truncated-btn {
  flex-shrink: 0;
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 500;
  color: #fff;
  background: #f59e0b;
  border: 1px solid #d97706;
  border-radius: 6px;
  cursor: pointer;
  transition: background 120ms ease;
}
.msg-truncated-btn:hover { background: #d97706; }
.msg-truncated-btn:active { background: #b45309; }
[data-theme="dark"] .msg-truncated-hint {
  color: #fde68a; background: rgba(251,191,36,0.12); border-color: rgba(251,191,36,0.4);
}
[data-theme="dark"] .msg-truncated-btn {
  background: #d97706; border-color: #b45309; color: #fff;
}
[data-theme="dark"] .msg-truncated-btn:hover { background: #b45309; }

.toast.warn .ic { color: #d97706; }
[data-theme="dark"] .toast.warn .ic { color: #fbbf24; }

/* 模型详情 ⓘ 按钮 + modal */
.model-info-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px;
  margin-left: 4px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 140ms ease;
  vertical-align: middle;
  flex-shrink: 0;
}
.model-info-btn:hover { color: var(--primary); border-color: var(--primary); background: var(--primary-soft); }
[data-theme="dark"] .model-info-btn { background: rgba(255,255,255,0.04); }
[data-theme="dark"] .model-info-btn:hover { background: rgba(99,102,241,0.16); border-color: var(--primary-hover); color: var(--primary-hover); }

#modelInfoModal .modal-card { max-width: 480px; }
.model-info-card { padding: 18px 22px; display: flex; flex-direction: column; gap: 14px; }
.mi-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.mi-name { font-size: 16px; font-weight: 600; color: var(--text); }
.mi-rank {
  font-size: 12px; padding: 3px 9px;
  background: var(--primary-soft); color: var(--primary);
  border-radius: 999px; font-weight: 500; flex-shrink: 0;
}
.mi-tagline { font-size: 13px; color: var(--text-muted); line-height: 1.5; padding-bottom: 8px; border-bottom: 1px dashed var(--border); }
.mi-section-label { font-size: 12px; color: var(--text-muted); font-weight: 500; margin-bottom: 4px; }
.mi-strengths { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 6px; }
.mi-strengths li { font-size: 13px; color: var(--text); padding-left: 18px; position: relative; line-height: 1.5; }
.mi-strengths li::before { content: '✓'; position: absolute; left: 0; top: 0; color: #10b981; font-weight: 700; }
.mi-meta-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.mi-meta-cell {
  background: var(--surface-soft); border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 12px;
}
.mi-meta-label { font-size: 11px; color: var(--text-muted); }
.mi-meta-value { font-size: 13px; font-weight: 500; color: var(--text); margin-top: 2px; }
.mi-doc-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--primary); text-decoration: none;
  padding: 8px 12px; border: 1px solid var(--primary-soft);
  background: var(--primary-soft); border-radius: 8px;
  transition: all 140ms ease;
  align-self: flex-start;
}
.mi-doc-link:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Captcha 图形验证码（注册流程） */
.auth-captcha-row {
  display: flex;
  align-items: stretch;
  gap: 8px;
  margin-top: 8px;
}
.auth-captcha-row input {
  flex: 1;
  padding: 10px 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 8px;
  font-size: 14px;
  letter-spacing: 4px;
  text-align: center;
  text-transform: uppercase;
}
.auth-captcha-row input:focus { outline: none; border-color: var(--primary); }
.auth-captcha-img {
  width: 110px; height: 42px;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  background: #fff;
  object-fit: cover;
  flex-shrink: 0;
  transition: opacity 120ms;
}
.auth-captcha-img:hover { opacity: 0.85; }

/* Aff 推广分享 modal */
.aff-modal-body { padding: 16px 20px; display: flex; flex-direction: column; gap: 14px; }
.aff-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.aff-stat {
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
}
.aff-stat-label { font-size: 12px; color: var(--text-muted); }
.aff-stat-value { font-size: 20px; font-weight: 600; color: var(--text); margin-top: 4px; }
.aff-link-row { display: flex; gap: 8px; }
.aff-link-row input {
  flex: 1; padding: 8px 10px; font-size: 12px;
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text); border-radius: 6px; font-family: monospace;
}
.aff-share-tpl {
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 12px;
  color: var(--text-muted);
  white-space: pre-wrap;
  max-height: 160px;
  overflow-y: auto;
}

/* Typing indicator */
.typing {
  display: inline-flex; gap: 4px; padding: 6px 8px;
}
.typing span {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--text-dim);
  animation: bounce 1.2s ease-in-out infinite;
}
.typing span:nth-child(2) { animation-delay: 0.15s; }
.typing span:nth-child(3) { animation-delay: 0.3s; }
@keyframes bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
  30% { transform: translateY(-5px); opacity: 1; }
}

/* ===== Empty state with starter prompts ===== */
.empty-state {
  flex: 1;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 40px 24px;
  text-align: center;
}
.empty-state-icon {
  width: 56px; height: 56px;
  background: var(--gradient-primary);
  border-radius: 18px;
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff;
  margin-bottom: 18px;
  box-shadow: var(--shadow-glow-primary);
}
.empty-state-icon svg { width: 28px; height: 28px; }
.empty-state-title {
  font-size: 22px; font-weight: 700; color: var(--text); margin-bottom: 6px;
  background: var(--gradient-primary);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.empty-state-sub { font-size: 13px; color: var(--text-muted); margin-bottom: 24px; }
.starter-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px; width: 100%; max-width: 640px;
}
.starter-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  text-align: left;
  cursor: pointer;
  transition: all 180ms ease;
}
.starter-card:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
[data-theme="dark"] .starter-card { background: rgba(255,255,255,0.04); }
[data-theme="dark"] .starter-card:hover { background: rgba(99,102,241,0.12); }
.starter-card-icon { font-size: 18px; margin-bottom: 6px; }
.starter-card-title { font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.starter-card-text { font-size: 11.5px; color: var(--text-muted); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ===== Composer ===== */
.composer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 14px 18px 12px;
}
[data-theme="dark"] .composer { background: transparent; }
.composer-toolbar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 10px; }
.model-select {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  background: var(--surface);
  font-size: 12px; color: var(--text);
  cursor: pointer; transition: all 160ms ease;
}
.model-select:hover { border-color: var(--primary); }
[data-theme="dark"] .model-select { background: var(--surface-soft); backdrop-filter: blur(var(--blur)); }
[data-theme="dark"] .model-select option { background: #1a1a2e; color: var(--text); }
.tool-btn {
  display: inline-flex; align-items: center; gap: 5px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 11px;
  font-size: 12px;
  color: var(--text-muted);
  background: var(--surface);
  transition: all 160ms ease;
}
.tool-btn:hover { background: var(--surface-hover); color: var(--text); border-color: var(--border-strong); }
.tool-btn.icon-only {
  width: 30px; height: 30px;
  padding: 0;
  justify-content: center;
}
.tool-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  background: var(--surface-soft);
}
.tool-btn:disabled:hover { background: var(--surface-soft); color: var(--text-muted); border-color: var(--border); }
.tool-btn.ready {
  background: var(--primary-soft);
  color: var(--primary);
  border-color: rgba(124,58,237,0.3);
}
[data-theme="dark"] .tool-btn.ready { background: rgba(99,102,241,0.18); color: var(--primary-hover); border-color: rgba(99,102,241,0.4); }
.tool-btn.active { background: #fef3c7; border-color: #fbbf24; color: #92400e; }
.tool-btn.active.doc { background: #dbeafe; border-color: #60a5fa; color: #1e40af; }

/* ========== 拖拽上传浮动窗口 ========== */
.drop-zone {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 600;
  display: none;
  align-items: center; justify-content: center;
  animation: fade-in 160ms ease;
}
.drop-zone-card {
  position: relative;
  width: min(560px, 90vw);
  padding: 38px 32px 30px;
  background: var(--surface);
  border: 2px dashed var(--border-strong);
  border-radius: 18px;
  box-shadow: 0 24px 60px rgba(0,0,0,0.32);
  text-align: center;
  transition: all 200ms ease;
}
.drop-zone-card.drop-zone-active {
  border-color: var(--primary);
  background: var(--primary-soft);
  transform: scale(1.02);
  box-shadow: 0 32px 80px rgba(124,58,237,0.4);
}
.drop-zone-close {
  position: absolute; top: 8px; right: 14px;
  width: 32px; height: 32px;
  font-size: 22px; line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  transition: all 120ms ease;
}
.drop-zone-close:hover { background: var(--surface-hover); color: var(--text); }
.drop-zone-icon { font-size: 56px; line-height: 1; margin-bottom: 12px; }
.drop-zone-card.drop-zone-active .drop-zone-icon { animation: drop-bounce 0.6s ease infinite; }
@keyframes drop-bounce {
  0%,100% { transform: translateY(0); }
  50%     { transform: translateY(-8px); }
}
.drop-zone-title { font-size: 18px; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.drop-zone-sub { font-size: 13px; color: var(--text-muted); margin-bottom: 18px; }
.drop-zone-link { color: var(--primary); cursor: pointer; text-decoration: underline; font-weight: 500; }
.drop-zone-link:hover { color: var(--primary-hover); }
.drop-zone-tip {
  display: flex; flex-direction: column; gap: 4px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
  font-size: 11px; color: var(--text-dim);
}
/* model select 限宽避免把后面按钮挤换行 */
.model-select { max-width: 200px; text-overflow: ellipsis; }
[data-theme="dark"] .tool-btn { background: var(--surface-soft); backdrop-filter: blur(var(--blur)); }
[data-theme="dark"] .tool-btn.active { background: rgba(251,191,36,0.18); border-color: rgba(251,191,36,0.45); color: var(--accent-amber); }
[data-theme="dark"] .tool-btn.active.doc { background: rgba(34,211,238,0.18); border-color: rgba(34,211,238,0.45); color: var(--accent-cyan); }
.tip { font-size: 11px; color: var(--text-muted); margin-left: auto; padding: 0 4px; }
.tip.image { color: var(--accent-amber); font-weight: 500; }

.attach-row {
  margin-bottom: 10px;
  display: flex; flex-direction: column; gap: 8px;
}
.attach-card {
  padding: 9px 12px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 10px;
  font-size: 12px;
  color: #1e3a8a;
  display: flex; align-items: center; gap: 10px;
}
[data-theme="dark"] .attach-card { background: rgba(34,211,238,0.12); border-color: rgba(34,211,238,0.3); color: var(--accent-cyan); }
.attach-card.image { background: #fdf4ff; border-color: #f0abfc; color: #86198f; }
[data-theme="dark"] .attach-card.image { background: rgba(217,70,239,0.12); border-color: rgba(217,70,239,0.3); color: #f0abfc; }
.attach-card .name { flex: 1; font-weight: 500; word-break: break-all; }
.attach-card .size { color: var(--text-muted); }
.attach-card .clear {
  width: 22px; height: 22px; border-radius: 5px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--text-dim);
  transition: all 160ms ease;
}
.attach-card .clear:hover { background: rgba(220,38,38,0.1); color: var(--danger); }
.attach-thumb {
  width: 48px; height: 48px;
  border-radius: 6px;
  object-fit: cover;
  border: 1px solid var(--border);
  flex-shrink: 0;
  cursor: zoom-in;
}
.attach-images {
  display: flex; flex-wrap: wrap; gap: 6px;
  padding: 8px 10px;
  background: #fdf4ff;
  border: 1px solid #f0abfc;
  border-radius: 10px;
}
[data-theme="dark"] .attach-images { background: rgba(217,70,239,0.10); border-color: rgba(217,70,239,0.3); }
.attach-images-head {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between;
  font-size: 11px; color: var(--text-muted);
  margin-bottom: 2px;
}
.attach-images-head .clear-all {
  font-size: 11px; color: var(--text-muted);
  padding: 2px 8px; border-radius: 4px;
  transition: all 120ms ease;
}
.attach-images-head .clear-all:hover { background: rgba(220,38,38,0.1); color: var(--danger); }
.attach-docs-head {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between;
  font-size: 11px; color: var(--text-muted);
  margin-bottom: 2px;
  padding: 2px 4px;
}
.attach-docs-head .clear-all {
  font-size: 11px; color: var(--text-muted);
  padding: 2px 8px; border-radius: 4px;
  transition: all 120ms ease;
}
.attach-docs-head .clear-all:hover { background: rgba(220,38,38,0.1); color: var(--danger); }
.attach-mini {
  position: relative;
  width: 56px; height: 56px;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.attach-mini img { width: 100%; height: 100%; object-fit: cover; cursor: zoom-in; display: block; }
.attach-mini .x {
  position: absolute; top: 2px; right: 2px;
  width: 18px; height: 18px;
  border-radius: 4px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer;
  opacity: 0; transition: opacity 120ms ease;
}
.attach-mini:hover .x { opacity: 1; }
.attach-actions {
  display: flex; gap: 6px; flex-wrap: wrap;
  padding: 0 2px;
}
.attach-action-btn {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 6px 11px;
  border-radius: 8px;
  font-size: 12px;
  background: var(--gradient-primary);
  color: #fff;
  border: 1px solid transparent;
  box-shadow: 0 2px 8px rgba(124,58,237,0.18);
  transition: all 160ms ease;
}
.attach-action-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(124,58,237,0.32); }
.attach-action-btn.ghost { background: var(--surface); color: var(--primary); border-color: var(--border); box-shadow: none; }
.attach-action-btn.ghost:hover { background: var(--primary-soft); border-color: var(--primary); }
[data-theme="dark"] .attach-action-btn.ghost { background: rgba(255,255,255,0.05); }

.doc-attached {
  margin-bottom: 10px;
  padding: 9px 12px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 10px;
  font-size: 12px;
  color: #1e3a8a;
  display: flex; align-items: center; gap: 10px;
}
[data-theme="dark"] .doc-attached { background: rgba(34,211,238,0.12); border-color: rgba(34,211,238,0.3); color: var(--accent-cyan); }
.doc-attached .name { flex: 1; font-weight: 500; word-break: break-all; }
.doc-attached .size { color: var(--text-muted); }
.doc-attached .clear {
  width: 22px; height: 22px; border-radius: 5px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--text-dim);
  transition: all 160ms ease;
}
.doc-attached .clear:hover { background: rgba(220,38,38,0.1); color: var(--danger); }

.composer-input {
  display: flex; gap: 10px; align-items: flex-end;
  background: var(--surface-soft);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 10px 10px 10px 14px;
  transition: all 200ms ease;
}
[data-theme="dark"] .composer-input { background: var(--surface); backdrop-filter: blur(var(--blur)); }
.composer-input:focus-within {
  border-color: var(--primary);
  background: var(--surface);
  box-shadow: 0 0 0 4px rgba(124,58,237,0.12);
}
[data-theme="dark"] .composer-input:focus-within { box-shadow: 0 0 0 4px rgba(99,102,241,0.18); }
.composer-input textarea {
  flex: 1; border: none; resize: none; background: transparent;
  font-size: 14px; line-height: 1.6;
  max-height: 200px; color: var(--text);
}
.composer-input textarea::placeholder { color: var(--text-dim); }
.send-btn {
  flex-shrink: 0;
  width: 42px; height: 42px;
  border-radius: 12px;
  background: var(--gradient-primary);
  color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  transition: all 200ms ease;
  box-shadow: var(--shadow-glow-primary);
}
.send-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(124,58,237,0.4); }
.send-btn:active { transform: translateY(0); }

/* prompt 压缩按钮（输入框右侧，仅长 prompt 显示） */
.compress-btn {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 7px 12px;
  margin-right: 6px;
  font-size: 12px; font-weight: 500;
  color: #fff;
  background: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
  border: 0; border-radius: 10px;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(139,92,246,0.32);
  transition: transform 120ms ease, box-shadow 160ms ease;
}
.compress-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 14px rgba(139,92,246,0.5); }
.compress-btn:disabled { opacity: 0.6; cursor: wait; }

/* 必须压缩态：红色高亮 + pulse */
.compress-btn.compress-btn-required {
  background: linear-gradient(135deg, #ef4444 0%, #f97316 100%);
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.42);
  animation: compress-pulse 1.6s ease-in-out infinite;
}
.compress-btn.compress-btn-required:hover { box-shadow: 0 6px 20px rgba(239, 68, 68, 0.6); }
@keyframes compress-pulse {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.04); }
}
.compress-btn.compress-btn-shake { animation: compress-shake 0.55s cubic-bezier(.36,.07,.19,.97) both; }
@keyframes compress-shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(3px); }
  30%, 50%, 70% { transform: translateX(-5px); }
  40%, 60% { transform: translateX(5px); }
}

/* send 按钮禁用态 */
.send-btn:disabled, .send-btn.send-btn-blocked {
  background: linear-gradient(135deg, #9ca3af 0%, #6b7280 100%) !important;
  box-shadow: none !important;
  cursor: not-allowed !important;
  opacity: 0.6;
}
.send-btn:disabled:hover, .send-btn.send-btn-blocked:hover {
  transform: none !important;
  box-shadow: none !important;
}

/* user 消息 hover 工具条（与 assistant 共用 .msg-tools，但用户气泡靠右对齐） */
.msg.user .msg-tools { justify-content: flex-end; }
.msg.user:hover .msg-tools { opacity: 1; }

.composer-foot {
  margin-top: 8px;
  font-size: 11px; color: var(--text-dim);
  text-align: center;
}

/* ===== Auth ===== */
.auth-screen {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-deep);
  z-index: 100;
}
:root .auth-screen, [data-theme="light"] .auth-screen {
  background: linear-gradient(135deg, #ffffff 0%, #faf5ff 50%, #eff6ff 100%);
}
[data-theme="dark"] .auth-screen { background: var(--bg-deep); }
[data-theme="dark"] .auth-screen::before, [data-theme="dark"] .auth-screen::after {
  content: ''; position: absolute; border-radius: 50%; filter: blur(120px); opacity: 0.5; pointer-events: none;
}
[data-theme="dark"] .auth-screen::before { width: 480px; height: 480px; background: #6366f1; top: -120px; left: -120px; }
[data-theme="dark"] .auth-screen::after { width: 520px; height: 520px; background: #a855f7; bottom: -160px; right: -160px; }
.auth-screen.hidden { display: none; }
.auth-card {
  position: relative; z-index: 1;
  width: 400px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  box-shadow: var(--shadow-lg);
}
[data-theme="dark"] .auth-card {
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
}
.auth-brand {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  font-size: 22px; font-weight: 700; color: var(--text); margin-bottom: 26px;
}
.auth-brand svg { color: var(--primary); }
.auth-tabs {
  display: flex; gap: 4px;
  background: var(--surface-soft);
  border-radius: 10px; padding: 4px; margin-bottom: 20px;
}
[data-theme="dark"] .auth-tabs { background: rgba(0,0,0,0.25); }
.auth-tab {
  flex: 1; padding: 9px; border-radius: 7px;
  font-size: 13px; color: var(--text-muted);
  transition: all 160ms ease;
}
.auth-tab.active { background: var(--surface); color: var(--primary); box-shadow: var(--shadow-sm); font-weight: 500; }
[data-theme="dark"] .auth-tab.active { color: var(--text); background: rgba(255,255,255,0.08); }
.auth-form { display: flex; flex-direction: column; gap: 12px; }
.auth-form input {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 14px; color: var(--text);
  transition: all 160ms ease;
}
[data-theme="dark"] .auth-form input { background: rgba(0,0,0,0.25); }
.auth-form input::placeholder { color: var(--text-dim); }
.auth-form input:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(124,58,237,0.12); }
[data-theme="dark"] .auth-form input:focus { box-shadow: 0 0 0 4px rgba(99,102,241,0.18); }
.auth-error { font-size: 12px; color: var(--danger); min-height: 16px; }
.auth-foot { text-align: center; font-size: 12px; color: var(--text-muted); margin-top: 18px; }
.auth-foot b { color: var(--accent-emerald); }

/* ===== Modal ===== */
.modal {
  position: fixed; inset: 0;
  background: rgba(15, 23, 42, 0.4);
  display: none;
  align-items: center; justify-content: center;
  z-index: 200;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
[data-theme="dark"] .modal { background: rgba(5, 5, 16, 0.65); backdrop-filter: blur(8px); }
.modal.show { display: flex; animation: fade-in 160ms ease; }
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
.modal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 420px; padding: 26px;
  box-shadow: var(--shadow-lg);
  animation: pop-in 200ms cubic-bezier(0.21, 1, 0.4, 1);
}
@keyframes pop-in { from { opacity: 0; transform: scale(0.95) translateY(8px); } to { opacity: 1; transform: scale(1) translateY(0); } }
[data-theme="dark"] .modal-card {
  background: rgba(20, 20, 35, 0.85);
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  border-color: var(--border-strong);
}
.modal-title { font-size: 16px; font-weight: 600; margin-bottom: 14px; color: var(--text); }
.modal-body { margin-bottom: 18px; }
.modal-body .hint { font-size: 13px; color: var(--text-muted); margin-bottom: 12px; }
.modal-body input {
  width: 100%; background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 14px;
  font-size: 14px; color: var(--text);
  transition: all 160ms ease;
}
[data-theme="dark"] .modal-body input { background: rgba(0,0,0,0.3); }
.modal-body input:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(124,58,237,0.12); }
.modal-error { font-size: 12px; color: var(--danger); min-height: 16px; margin-top: 6px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; }

/* ===== Cmd+K palette ===== */
.cmd-palette {
  position: fixed; inset: 0;
  background: rgba(15, 23, 42, 0.45);
  display: none;
  align-items: flex-start; justify-content: center;
  padding-top: 12vh;
  z-index: 300;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
[data-theme="dark"] .cmd-palette { background: rgba(5, 5, 16, 0.65); }
.cmd-palette.show { display: flex; animation: fade-in 140ms ease; }
.cmd-card {
  width: 560px; max-width: 92vw;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: pop-in 200ms cubic-bezier(0.21, 1, 0.4, 1);
}
[data-theme="dark"] .cmd-card { background: rgba(20, 20, 35, 0.92); backdrop-filter: blur(24px); border-color: var(--border-strong); }
.cmd-search {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
}
.cmd-search input {
  flex: 1; border: none; background: transparent;
  font-size: 14px; color: var(--text);
}
.cmd-search input::placeholder { color: var(--text-dim); }
.cmd-list {
  max-height: 360px; overflow-y: auto;
  padding: 6px;
}
.cmd-section { padding: 8px 10px 4px; font-size: 10px; font-weight: 600; text-transform: uppercase; color: var(--text-dim); letter-spacing: 0.6px; }
.cmd-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px; color: var(--text);
}
.cmd-item .cmd-icon {
  width: 28px; height: 28px;
  border-radius: 7px;
  background: var(--surface-soft);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  flex-shrink: 0;
}
.cmd-item .cmd-text { flex: 1; min-width: 0; }
.cmd-item .cmd-title { font-weight: 500; line-height: 1.3; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cmd-item .cmd-sub { font-size: 11px; color: var(--text-dim); margin-top: 1px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cmd-item.active { background: var(--primary-soft); color: var(--primary); }
.cmd-item.active .cmd-icon { background: var(--primary); color: #fff; }
[data-theme="dark"] .cmd-item.active { background: rgba(99,102,241,0.18); color: var(--primary-hover); }

/* ===== Toast ===== */
.toast-container {
  position: fixed; bottom: 20px; right: 20px;
  display: flex; flex-direction: column; gap: 8px;
  z-index: 400;
  pointer-events: none;
}
.toast {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 14px;
  font-size: 13px;
  color: var(--text);
  box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: 10px;
  min-width: 240px;
  pointer-events: auto;
  animation: toast-in 240ms cubic-bezier(0.21, 1, 0.4, 1);
}
[data-theme="dark"] .toast { background: rgba(20,20,35,0.95); backdrop-filter: blur(20px); border-color: var(--border-strong); }
.toast.toast-leave { animation: toast-out 240ms ease forwards; }
@keyframes toast-in { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }
@keyframes toast-out { to { opacity: 0; transform: translateX(20px); } }
.toast .ic { width: 18px; height: 18px; flex-shrink: 0; }
.toast.success .ic { color: var(--accent-emerald); }
.toast.error .ic { color: var(--danger); }
.toast.info .ic { color: var(--primary); }

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(15,23,42,0.12); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(15,23,42,0.22); }
[data-theme="dark"] ::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); }
[data-theme="dark"] ::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

/* hljs override (光标色 / pad) */
.hljs { background: transparent !important; padding: 0 !important; }

/* ===== Gallery image hover (download badge) ===== */
.gallery-img-wrap {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  cursor: zoom-in;
}
.gallery-img-wrap img {
  width: 100%; aspect-ratio: 1; object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--border);
  transition: transform 160ms ease;
  display: block;
}
.gallery-img-wrap:hover img { transform: scale(1.04); }
.gallery-img-dl {
  position: absolute; top: 6px; right: 6px;
  width: 28px; height: 28px;
  border-radius: 6px;
  background: rgba(15, 23, 42, 0.7);
  color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  opacity: 0;
  transition: opacity 160ms ease, transform 120ms ease;
  backdrop-filter: blur(6px);
}
.gallery-img-wrap:hover .gallery-img-dl { opacity: 1; }
.gallery-img-dl:hover { transform: scale(1.1); background: var(--primary); }
.gallery-warn {
  margin: 8px 12px 0;
  padding: 8px 10px;
  background: #fef3c7;
  border: 1px solid #fde68a;
  border-radius: 8px;
  font-size: 11px;
  color: #92400e;
  line-height: 1.5;
}
[data-theme="dark"] .gallery-warn {
  background: rgba(251,191,36,0.12);
  border-color: rgba(251,191,36,0.35);
  color: var(--accent-amber);
}

/* ===== Inline image bubble: download chip ===== */
.msg-image-wrap {
  position: relative; display: inline-block; margin-top: 8px; max-width: 100%;
}
.msg-image-dl {
  position: absolute; top: 8px; right: 8px;
  display: inline-flex; align-items: center; gap: 4px;
  padding: 5px 10px;
  border-radius: 6px;
  background: rgba(15, 23, 42, 0.7);
  color: #fff;
  font-size: 11px;
  opacity: 0;
  transition: opacity 160ms ease, background 120ms ease;
  backdrop-filter: blur(6px);
  cursor: pointer;
}
.msg-image-wrap:hover .msg-image-dl { opacity: 1; }
.msg-image-dl:hover { background: var(--primary); }

/* ===== Full-screen image modal ===== */
.image-modal {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.88);
  display: none;
  align-items: center; justify-content: center;
  z-index: 500;
  padding: 60px 32px 32px;
  cursor: zoom-out;
}
.image-modal.show { display: flex; animation: fade-in 160ms ease; }
.image-modal img {
  max-width: 100%; max-height: 100%;
  object-fit: contain;
  border-radius: 6px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
  cursor: default;
  animation: pop-in 220ms cubic-bezier(0.21, 1, 0.4, 1);
}
.image-modal-toolbar {
  position: fixed;     /* fixed > absolute：图片再大也不会把 toolbar 推出视口 */
  top: 14px; right: 14px;
  z-index: 510;        /* 高于 .image-modal 自己 */
  display: flex; gap: 8px; align-items: center;
  flex-wrap: wrap; justify-content: flex-end;
  max-width: calc(100vw - 28px);
  padding: 6px 8px;
  background: rgba(0,0,0,0.45);
  backdrop-filter: blur(8px);
  border-radius: 12px;
}
.image-modal-meta {
  color: rgba(255,255,255,0.75);
  font-size: 12px;
  margin-right: 8px;
}
.image-modal-btn {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 7px 12px;
  background: rgba(255,255,255,0.12);
  color: #fff;
  border-radius: 8px;
  font-size: 13px;
  backdrop-filter: blur(8px);
  transition: background 120ms ease;
}
.image-modal-btn:hover { background: rgba(255,255,255,0.22); }