/* Fish Ai UI v2: visual layer only, business styles remain in index.css. */
:root {
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --primary-light: #eef2ff;
  --accent: #06b6d4;
  --bg: #f7f9fe;
  --bg-soft: #f0f4fb;
  --bg-hover: #e8eef9;
  --surface: rgba(255, 255, 255, .82);
  --surface-solid: #fff;
  --surface-raised: rgba(255, 255, 255, .94);
  --border: rgba(127, 145, 178, .2);
  --border-soft: rgba(127, 145, 178, .12);
  --text: #182033;
  --text-secondary: #59657a;
  --text-muted: #8b96aa;
  --sidebar-w: 292px;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(47, 64, 109, .09);
  --shadow-lg: 0 24px 70px rgba(39, 50, 86, .17);
  --glow: 79, 70, 229;
}

html[data-theme="dark"] {
  --primary: #818cf8;
  --primary-dark: #a5b4fc;
  --primary-light: rgba(99, 102, 241, .17);
  --accent: #22d3ee;
  --bg: #080d18;
  --bg-soft: #0e1524;
  --bg-hover: #172033;
  --surface: rgba(15, 23, 40, .82);
  --surface-solid: #111a2b;
  --surface-raised: rgba(18, 27, 46, .96);
  --border: rgba(148, 163, 184, .17);
  --border-soft: rgba(148, 163, 184, .1);
  --text: #edf3ff;
  --text-secondary: #aab6ca;
  --text-muted: #718096;
  --shadow: 0 14px 34px rgba(0, 0, 0, .28);
  --shadow-lg: 0 28px 80px rgba(0, 0, 0, .48);
  --glow: 129, 140, 248;
}

html { background: var(--bg); }
body {
  background: var(--bg);
  letter-spacing: -.006em;
  transition: background-color .28s ease, color .28s ease;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 18% 6%, rgba(34, 211, 238, .11), transparent 29%),
    radial-gradient(circle at 82% 12%, rgba(99, 102, 241, .12), transparent 34%),
    linear-gradient(rgba(79, 70, 229, .025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79, 70, 229, .025) 1px, transparent 1px);
  background-size: auto, auto, 40px 40px, 40px 40px;
  mask-image: linear-gradient(to bottom, #000, transparent 68%);
  z-index: 0;
}
.app { position: relative; z-index: 1; }
::selection { color: #fff; background: #6366f1; }
::-webkit-scrollbar { width: 7px; height: 7px; }
::-webkit-scrollbar-thumb { background: rgba(128, 145, 172, .42); border-radius: 99px; }

/* Sidebar */
.sidebar {
  margin: 10px 0 10px 10px;
  height: calc(100dvh - 20px);
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: 0 18px 50px rgba(45, 57, 94, .1);
  backdrop-filter: blur(22px) saturate(145%);
  -webkit-backdrop-filter: blur(22px) saturate(145%);
  overflow: hidden;
}
.sidebar-header { padding: 20px 18px 10px; }
.logo { gap: 11px; font-size: 20px; font-weight: 800; letter-spacing: -.5px; }
.logo-icon { width: 37px; height: 37px; border-radius: 12px; box-shadow: 0 7px 18px rgba(var(--glow), .3); }
.logo .logo-text { background: linear-gradient(125deg, #0891b2 5%, #4f46e5 55%, #7c3aed); background-clip: text; -webkit-background-clip: text; }
.new-chat-btn {
  margin: 12px 14px 8px;
  min-height: 44px;
  border-radius: 13px;
  background: linear-gradient(120deg, #06b6d4, #4f46e5 62%, #7c3aed);
  box-shadow: 0 9px 24px rgba(79, 70, 229, .27), inset 0 1px rgba(255, 255, 255, .25);
  transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
}
.new-chat-btn:hover { background: linear-gradient(120deg, #06b6d4, #4f46e5 62%, #7c3aed); transform: translateY(-2px); filter: saturate(1.12); box-shadow: 0 13px 30px rgba(79, 70, 229, .35); }
.nav-menu { padding: 8px 11px; }
.nav-item { min-height: 41px; border-radius: 11px; padding: 9px 11px; transition: all .18s ease; }
.nav-item:hover { transform: translateX(3px); background: var(--bg-hover); color: var(--primary-dark); }
.nav-item svg { width: 18px; height: 18px; }
.nav-item.nav-item-new, .nav-item.nav-item-api { margin: 3px 1px; border-radius: 12px; }

/* 分组式紧凑导航：减少纵向占用，同时保留清晰的功能层级。 */
.nav-menu { display: flex; flex-direction: column; gap: 7px; padding: 8px 11px; }
.nav-group { display: flex; flex-direction: column; gap: 2px; padding: 4px; background: rgba(248,250,252,.82); border: 1px solid var(--border-soft); border-radius: 8px; }
.nav-item { position: relative; min-width: 0; min-height: 38px; gap: 7px; padding: 8px 9px; border-radius: 6px; white-space: nowrap; }
.nav-item:hover { transform: none; }
.nav-item.nav-item-new, .nav-item.nav-item-api { margin: 0; border-radius: 6px; }
.nav-item.nav-item-new .ni-badge { position: absolute; top: 3px; right: 3px; margin:0; padding: 1px 4px; font-size: 7px; }
.nav-item-qq .qq-nav-tag { position: absolute; top: 3px; right: 3px; padding: 1px 4px; font-size: 7px; }
.nav-item-redeem { color: #047857; }
.nav-item-redeem svg { color: #059669; }
.nav-item-redeem:hover { color: #065f46; background: #ecfdf5; }
.nav-item .ni-badge, .nav-item .api-nav-badge, .nav-item .qq-nav-tag { flex-shrink: 0; }
html[data-theme="dark"] .nav-group { background: rgba(15,23,42,.48); border-color: rgba(148,163,184,.14); }
html[data-theme="dark"] .redeem-panel { color:#e5edf8; }
html[data-theme="dark"] .redeem-form label { color:#cbd5e1; }
html[data-theme="dark"] .redeem-input-wrap input { color:#f8fafc; background:#111c2d; border-color:#3b4a5f; }
html[data-theme="dark"] .redeem-note { color:#aab7c8; background:#152034; border-color:#334155; }
.history-label { padding: 14px 17px 7px; }
.history-action { border-radius: 7px; }
.history-item { margin-bottom: 3px; border-radius: 10px; }
.history-item.active { box-shadow: inset 3px 0 var(--primary); }
.sidebar-footer { margin: 0 10px 10px; padding: 9px 4px 0; }
.user-box { border: 1px solid transparent; border-radius: 13px; }
.user-box:hover { border-color: var(--border); background: var(--surface-raised); box-shadow: var(--shadow); }

/* Header */
.main { background: transparent; }
.main-header {
  height: 76px;
  margin: 0 14px;
  padding: 0 10px 0 18px;
  border-bottom-color: var(--border-soft);
  background: rgba(247, 249, 254, .62);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 120;
}
html[data-theme="dark"] .main-header { background: rgba(8, 13, 24, .66); }
.chat-title { color: var(--text-secondary); font-size: 13px; font-weight: 650; letter-spacing: .02em; }
.model-select {
  min-width: 260px;
  padding: 8px 13px 8px 8px;
  border-color: var(--border);
  border-radius: 15px;
  background: var(--surface-raised);
  box-shadow: 0 8px 25px rgba(var(--glow), .13), inset 0 1px rgba(255, 255, 255, .5);
}
.model-select:hover, .model-select.open { border-color: rgba(var(--glow), .55); box-shadow: 0 12px 30px rgba(var(--glow), .2); }
.ms-icon { border-radius: 11px; }
.model-dropdown {
  border-color: var(--border);
  border-radius: 19px;
  background: var(--surface-raised);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(24px);
}
.md-tabs { border-color: var(--border-soft); }
.md-search input { background: var(--bg-soft); color: var(--text); }
.md-search input:focus { background: var(--surface-solid); }
.md-item:hover { background: var(--bg-hover); border-color: var(--border); }
.md-item.active { background: linear-gradient(135deg, var(--primary-light), rgba(34, 211, 238, .11)); }

.theme-toggle { width: 56px; height: 38px; display: grid; place-items: center; border-radius: 13px; }
.theme-toggle:focus-visible { outline: 3px solid rgba(var(--glow), .28); outline-offset: 2px; }
.theme-toggle-track {
  position: relative;
  width: 50px;
  height: 28px;
  display: block;
  border: 1px solid var(--border);
  border-radius: 99px;
  background: linear-gradient(135deg, #dff7ff, #e8e7ff);
  box-shadow: inset 0 2px 5px rgba(49, 60, 95, .09);
  transition: .3s ease;
}
.theme-toggle-thumb { position: absolute; left: 3px; top: 3px; width: 20px; height: 20px; border-radius: 50%; background: #fff; box-shadow: 0 3px 9px rgba(31, 41, 75, .24); transition: transform .32s cubic-bezier(.34, 1.56, .64, 1); z-index: 2; }
.theme-icon { position: absolute; top: 7px; width: 13px; height: 13px; z-index: 3; transition: opacity .2s; }
.theme-icon.sun { left: 7px; color: #f59e0b; }
.theme-icon.moon { right: 7px; color: #6366f1; opacity: .5; }
html[data-theme="dark"] .theme-toggle-track { background: linear-gradient(135deg, #1e293b, #312e81); border-color: rgba(129, 140, 248, .3); }
html[data-theme="dark"] .theme-toggle-thumb { transform: translateX(22px); background: #dbeafe; }
html[data-theme="dark"] .theme-icon.sun { opacity: .35; }
html[data-theme="dark"] .theme-icon.moon { color: #818cf8; opacity: 1; }

/* Welcome */
.chat-body { position: relative; }
.welcome { padding: 34px 28px 26px; }
.welcome::before, .welcome::after { content: ""; position: absolute; pointer-events: none; border-radius: 50%; filter: blur(1px); }
.welcome::before { width: min(48vw, 620px); height: min(48vw, 620px); left: 19%; top: -28%; background: radial-gradient(circle, rgba(34, 211, 238, .1), transparent 67%); }
.welcome::after { width: min(42vw, 540px); height: min(42vw, 540px); right: 2%; bottom: -28%; background: radial-gradient(circle, rgba(124, 58, 237, .1), transparent 67%); }
.welcome-logo { width: 80px; height: 80px; margin-bottom: 23px; border: 5px solid rgba(255, 255, 255, .74); border-radius: 25px; box-shadow: 0 18px 45px rgba(var(--glow), .27), 0 0 0 1px rgba(var(--glow), .12); transform: rotate(-3deg); animation: fishFloat 5s ease-in-out infinite; }
@keyframes fishFloat { 50% { transform: rotate(3deg) translateY(-7px); } }
.welcome h1 { margin-bottom: 7px; font-size: clamp(31px, 4vw, 44px); font-weight: 850; letter-spacing: -1.8px; background: linear-gradient(120deg, #172033, #4f46e5 52%, #0891b2); background-clip: text; -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
html[data-theme="dark"] .welcome h1 { background-image: linear-gradient(120deg, #f8fbff, #a5b4fc 52%, #67e8f9); }
.welcome p { margin-bottom: 35px; color: var(--text-secondary); font-size: 16px; }
.suggest-cards { position: relative; z-index: 2; max-width: 760px; gap: 13px; }
.suggest-card { position: relative; min-height: 116px; padding: 17px 18px; overflow: hidden; border-color: var(--border); border-radius: 17px; background: var(--surface); box-shadow: 0 8px 25px rgba(43, 56, 93, .055), inset 0 1px rgba(255,255,255,.55); backdrop-filter: blur(12px); }
.suggest-card::after { content: "→"; position: absolute; right: 17px; top: 17px; color: var(--text-muted); font-size: 18px; opacity: 0; transform: translateX(-5px); transition: .2s ease; }
.suggest-card:hover { border-color: rgba(var(--glow), .38); background: var(--surface-raised); transform: translateY(-5px); box-shadow: 0 18px 38px rgba(var(--glow), .14); }
.suggest-card:hover::after { opacity: 1; transform: none; color: var(--primary); }
.suggest-card .sc-icon { width: 34px; height: 34px; margin-bottom: 12px; border-radius: 10px; background: linear-gradient(135deg, var(--primary-light), rgba(34,211,238,.15)); }
.suggest-card:nth-child(2) .sc-icon { color: #7c3aed; background: rgba(124,58,237,.1); }
.suggest-card:nth-child(3) .sc-icon { color: #059669; background: rgba(16,185,129,.11); }
.suggest-card:nth-child(4) .sc-icon { color: #d97706; background: rgba(245,158,11,.12); }
.suggest-card .sc-title { font-size: 14px; font-weight: 750; }

/* Chat and composer */
.messages { max-width: 900px; padding-top: 30px; }
.msg { gap: 15px; padding: 12px 28px; }
.msg-avatar { width: 37px; height: 37px; border-radius: 12px; box-shadow: 0 7px 16px rgba(30, 41, 59, .14); }
.msg-content .role { font-weight: 750; }
.msg-bubble { line-height: 1.8; }
.msg.user .msg-bubble { width: fit-content; padding: 10px 14px; border: 1px solid rgba(79,70,229,.14); border-radius: 6px 16px 16px 16px; background: var(--primary-light); }
.input-area { padding: 13px 20px 18px; border-top: 0; background: linear-gradient(to top, var(--bg) 74%, transparent); }
.input-box { max-width: 900px; padding: 5px; border-color: var(--border); border-radius: 20px; background: var(--surface-raised); box-shadow: 0 14px 40px rgba(38, 51, 88, .12), 0 0 0 1px rgba(255,255,255,.4) inset; backdrop-filter: blur(20px); }
.input-box, .input-box :not(button):not(svg):not(path), #msgInput { cursor: text !important; }
.input-box button, .input-box button * { cursor: pointer !important; }
.input-box:focus-within { border-color: rgba(var(--glow), .65); box-shadow: 0 18px 48px rgba(var(--glow), .17), 0 0 0 4px rgba(var(--glow), .08); }
.input-row { padding: 7px; gap: 7px; }
.tool-btn { border-radius: 11px; }
.send-btn { width: 40px; height: 40px; border-radius: 13px; background: linear-gradient(135deg, #06b6d4, #4f46e5); box-shadow: 0 7px 16px rgba(79,70,229,.25); }
.send-btn:hover { background: linear-gradient(135deg, #0891b2, #4338ca); transform: translateY(-2px); box-shadow: 0 10px 22px rgba(79,70,229,.32); }
.send-btn:disabled { background: var(--bg-hover); color: var(--text-muted); box-shadow: none; }
.input-hint { margin-top: 9px; }

/* Common floating surfaces */
.modal-mask { background: rgba(10, 15, 28, .52); backdrop-filter: blur(10px); }
.modal { border: 1px solid var(--border); border-radius: 21px; background: var(--surface-solid); box-shadow: var(--shadow-lg); }
.modal-head { background: var(--surface-solid); border-color: var(--border-soft); }
.modal-body { background: var(--surface-solid); }
.modal-close { border-radius: 10px; }
.login-field input, .captcha-box .captcha-input { background: var(--bg-soft); color: var(--text); }
.auth-tab.active, .model-card, .points-card, .pay-method, .rs-card, .link-card, .share-btn, .qq-benefit { background: var(--surface-solid); }
.code-wrap { border-color: var(--border); background: var(--bg-soft); }
.code-head, .code-foot { background: var(--bg-soft); border-color: var(--border); }
.code-wrap pre { background: var(--surface-solid); }
.msg-bubble code:not(pre code) { background: var(--bg-hover); }
.md-table-card { border-color: var(--border); background: var(--surface-solid); }
.md-table-toolbar { border-color: var(--border); background: var(--bg-soft); }
.md-table-card td { color: var(--text-secondary); background: var(--surface-solid); border-color: var(--border); }
.md-table-card th { color: var(--text); background: var(--bg-hover); border-color: var(--border); }
.md-table-card tbody tr:nth-child(even) td { background: var(--bg-soft); }
.toast { border: 1px solid rgba(255,255,255,.12); border-radius: 13px; background: rgba(17,24,39,.92); backdrop-filter: blur(12px); }

/* Dark mode coverage for legacy hard-coded surfaces. */
html[data-theme="dark"] .sidebar,
html[data-theme="dark"] .model-dropdown,
html[data-theme="dark"] .suggest-card,
html[data-theme="dark"] .input-box { box-shadow: 0 18px 55px rgba(0,0,0,.26); }
html[data-theme="dark"] .nav-item.nav-item-new { color: #fcd34d; border-color: rgba(245,158,11,.25); background: linear-gradient(135deg, rgba(120,53,15,.24), rgba(161,98,7,.12)); }
html[data-theme="dark"] .nav-item.nav-item-api { color: #7dd3fc; border-color: rgba(56,189,248,.23); background: linear-gradient(135deg, rgba(7,89,133,.24), rgba(30,64,175,.12)); }
html[data-theme="dark"] .nav-item-qq .qq-nav-tag { color: #6ee7b7; background: rgba(6,78,59,.42); }
html[data-theme="dark"] .user-points-box { background: rgba(120,53,15,.36); }
html[data-theme="dark"] .up-label, html[data-theme="dark"] .up-value { color: #fcd34d; }
html[data-theme="dark"] .copy-btn-bottom,
html[data-theme="dark"] .msg.user .user-copy-btn,
html[data-theme="dark"] .assistant-copy-btn,
html[data-theme="dark"] .md-table-copy { color: var(--text-secondary); border-color: var(--border); background: var(--surface-raised); }
html[data-theme="dark"] .sk-line { background: linear-gradient(90deg, #182235 25%, #28354b 50%, #182235 75%); background-size: 200% 100%; }
html[data-theme="dark"] .modal.modal-profile .modal-head,
html[data-theme="dark"] .modal.modal-profile .modal-body { background: var(--bg-soft); }
html[data-theme="dark"] .announce-box { background: var(--surface-solid); }
html[data-theme="dark"] .announce-body { background: linear-gradient(to bottom, var(--bg-soft), var(--surface-solid)); }
html[data-theme="dark"] .announce-section { background: var(--surface-solid); border-color: var(--border); }
html[data-theme="dark"] .announce-section-desc,
html[data-theme="dark"] .announce-highlights li { color: var(--text-secondary); }
html[data-theme="dark"] .announce-section-highlight { background: rgba(76,29,149,.14); }
html[data-theme="dark"] .announce-section-warn { background: rgba(127,29,29,.15); }
html[data-theme="dark"] .announce-footer { color: var(--text-secondary); background: var(--bg-soft); border-color: var(--border); }
html[data-theme="dark"] .announce-checkbox { color: var(--text-secondary); }
html[data-theme="dark"] .modal.modal-api-logs .modal-head { color: var(--text); border-color: var(--border); background: var(--bg-soft); }
html[data-theme="dark"] .modal.modal-api-logs .modal-body { background: var(--bg); }
html[data-theme="dark"] .profile-hero,
html[data-theme="dark"] .points-head,
html[data-theme="dark"] .referral-banner,
html[data-theme="dark"] .qq-hero { color: var(--text); border-color: rgba(129,140,248,.22); background: linear-gradient(135deg, #111d31, #171a39 55%, #21172f); }
html[data-theme="dark"] .profile-name,
html[data-theme="dark"] .profile-points-card,
html[data-theme="dark"] .points-head-title,
html[data-theme="dark"] .points-section-title strong,
html[data-theme="dark"] .pay-method-title strong,
html[data-theme="dark"] .rb-title,
html[data-theme="dark"] .qq-hero h4,
html[data-theme="dark"] .pig-value,
html[data-theme="dark"] .pl-title,
html[data-theme="dark"] .rules-title { color: var(--text); }
html[data-theme="dark"] .profile-id,
html[data-theme="dark"] .ppc-label,
html[data-theme="dark"] .ppc-hint,
html[data-theme="dark"] .points-head-sub,
html[data-theme="dark"] .rb-sub,
html[data-theme="dark"] .qq-hero p,
html[data-theme="dark"] .qq-number-label,
html[data-theme="dark"] .rules-list li { color: var(--text-secondary); }
html[data-theme="dark"] .points-purchase { background: linear-gradient(180deg, var(--bg-soft) 0, var(--bg) 190px); }
html[data-theme="dark"] .points-card,
html[data-theme="dark"] .pay-method,
html[data-theme="dark"] .rs-card,
html[data-theme="dark"] .link-card,
html[data-theme="dark"] .rules-card,
html[data-theme="dark"] .share-btn,
html[data-theme="dark"] .pig-item,
html[data-theme="dark"] .profile-logs,
html[data-theme="dark"] .qq-benefit { color: var(--text); border-color: var(--border); background: var(--surface-solid); }
html[data-theme="dark"] .points-card.active { border-color: #818cf8; background: linear-gradient(145deg, rgba(30,58,138,.3), rgba(76,29,149,.2), var(--surface-solid)); }
html[data-theme="dark"] .pay-method.active.wxpay { background: linear-gradient(135deg, rgba(6,78,59,.3), var(--surface-solid)); }
html[data-theme="dark"] .pay-method.active.alipay { background: linear-gradient(135deg, rgba(30,64,175,.3), var(--surface-solid)); }
html[data-theme="dark"] .link-card-highlight,
html[data-theme="dark"] .rules-card { background: linear-gradient(135deg, var(--bg-soft), rgba(49,46,129,.2)); }
html[data-theme="dark"] .link-input-wrap,
html[data-theme="dark"] .link-card .lc-code,
html[data-theme="dark"] .qq-number-box,
html[data-theme="dark"] .points-balance { color: var(--text); background: rgba(15,23,42,.75) !important; border-color: var(--border); }
html[data-theme="dark"] .api-console { background: linear-gradient(180deg, #101b30 0, #15162e 166px, var(--bg) 166px); }
html[data-theme="dark"] .api-console-hero,
html[data-theme="dark"] .api-console-copy strong,
html[data-theme="dark"] .api-list-toolbar strong { color: var(--text); }
html[data-theme="dark"] .api-stat-card,
html[data-theme="dark"] .api-logs-table,
html[data-theme="dark"] .api-log-toggle,
html[data-theme="dark"] .api-formula,
html[data-theme="dark"] .api-logs-pagination button { color: var(--text-secondary); border-color: var(--border); background: var(--surface-solid); }
html[data-theme="dark"] .api-stat-value,
html[data-theme="dark"] .api-log-key strong,
html[data-theme="dark"] .api-detail-grid code { color: var(--text); }
html[data-theme="dark"] .api-logs-head,
html[data-theme="dark"] .api-log-detail { color: var(--text-secondary); border-color: var(--border); background: var(--bg-soft); }
html[data-theme="dark"] .api-log-entry { border-color: var(--border); }
html[data-theme="dark"] .api-log-entry:hover > .api-log-row,
html[data-theme="dark"] .api-log-entry.open > .api-log-row { background: var(--bg-hover); }

@media (max-width: 768px) {
  .sidebar {
    top: 66px;
    left: 0;
    bottom: 0;
    width: min(84vw, 330px);
    height: calc(100dvh - 74px);
    margin: 8px;
    border-radius: 19px;
    z-index: 180;
    transform: translateX(calc(-100% - 18px));
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
  }
  .sidebar.open { transform: translateX(0); }
  .overlay { top: 66px; z-index: 170; background: rgba(15,23,42,.52); backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px); }
  .sidebar-header { display: none; }
  .new-chat-btn { min-height: 46px; margin-top: 10px; }
  .nav-menu { flex: 0 0 auto; padding-top: 7px; }
  .nav-item { min-height: 40px; padding-top: 8px; padding-bottom: 8px; }
  .history-label { padding-top: 12px; }
  .history-list { min-height: 90px; padding-bottom: 6px; }
  .history-item { min-height: 39px; }
  .sidebar-footer { flex: 0 0 auto; margin-bottom: 8px; background: var(--surface); }
  .user-box { min-width: 0; }
  .user-points-box { max-width: 104px; padding: 5px 8px; }
  .up-value { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .main-header {
    height: 66px;
    margin: 0;
    padding: 0 10px;
    gap: 8px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(136px, 1.45fr) 40px;
    z-index: 190;
  }
  .header-side { min-width: 0; gap: 7px; }
  .header-side.right { justify-content: flex-end; }
  .menu-toggle { width: 38px; height: 38px; flex: 0 0 38px; border: 1px solid var(--border); background: var(--surface-raised); box-shadow: 0 5px 14px rgba(38,51,88,.08); }
  .menu-toggle.is-open { color: var(--primary); border-color: rgba(var(--glow), .35); background: var(--primary-light); }
  .menu-toggle svg { transition: transform .2s ease; }
  .menu-toggle.is-open svg { transform: rotate(90deg); }
  .chat-title { display: block; min-width: 0; font-size: 13px; font-weight: 800; color: var(--text); }
  .model-picker { min-width: 0; width: 100%; }
  .model-select { width: 100%; max-width: none; min-width: 0; height: 44px; padding: 5px 8px 5px 5px; border-radius: 14px; }
  .ms-name { max-width: none; width: 100%; font-size: 12.5px; }
  .ms-arrow { width: 14px; height: 14px; }
  .theme-toggle { width: 38px; height: 38px; border: 1px solid var(--border); background: var(--surface-raised); box-shadow: 0 5px 14px rgba(38,51,88,.08); }
  .theme-toggle-track { width: 36px; height: 36px; border: 0; background: transparent; box-shadow: none; }
  .theme-toggle-thumb { display: none; }
  .theme-icon { top: 10px; left: 10px; width: 16px; height: 16px; }
  .theme-icon.sun { left: 10px; opacity: 1; }
  .theme-icon.moon { right: auto; left: 10px; opacity: 0; }
  html[data-theme="dark"] .theme-toggle-track { border: 0; background: transparent; }
  html[data-theme="dark"] .theme-icon.sun { opacity: 0; }
  html[data-theme="dark"] .theme-icon.moon { color: #a5b4fc; opacity: 1; }
  .chat-body { min-height: 0; width: 100%; }
  .welcome { min-height: 100%; height: auto; justify-content: flex-start; padding: 34px 16px 22px; overflow: visible; }
  .welcome-logo { display: flex !important; width: 62px; height: 62px; margin-bottom: 14px; border-width: 4px; border-radius: 19px; flex: 0 0 auto; transform: none; animation: none; }
  .welcome-logo img { display: block !important; width: 100%; height: 100%; opacity: 1; visibility: visible; }
  .welcome h1 { margin-bottom: 3px; font-size: 29px; }
  .welcome p { margin-bottom: 22px; font-size: 13.5px; }
  .suggest-cards { gap: 9px; }
  .suggest-card { min-height: 72px; padding: 13px 15px; }
  .suggest-card .sc-icon { float: left; margin: 0 11px 0 0; }
  .suggest-card .sc-desc { margin-top: 2px; }
  .messages { width: 100%; max-width: none; padding: 16px 0 6px; }
  .msg { width: 100%; padding: 10px 12px; gap: 10px; }
  .msg-avatar { width: 34px; height: 34px; }
  .msg-content { width: calc(100% - 44px); min-width: 0; }
  .msg-bubble { width: 100%; font-size: 14px; overflow-wrap: anywhere; }
  .msg.user .msg-bubble-wrap { max-width: 100%; }
  .input-area { padding: 9px 10px 12px; }
  .input-box { width: 100%; border-radius: 17px; }
  .input-row { gap: 3px; padding: 5px; }
  .input-tools { gap: 0; }
  .tool-btn { width: 34px; height: 36px; }
  #msgInput { min-width: 0; font-size: 14px; padding-inline: 3px; }
  .input-hint { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 9.5px; }
}

@media (max-width: 390px) {
  .main-header { grid-template-columns: minmax(82px, 1fr) minmax(124px, 1.35fr) 36px; padding-inline: 7px; gap: 5px; }
  .menu-toggle { width: 34px; height: 36px; flex-basis: 34px; }
  .chat-title { font-size: 12px; }
  .theme-toggle { width: 36px; }
  .theme-toggle-track { width: 34px; }
  .theme-icon, .theme-icon.sun, .theme-icon.moon { left: 9px; }
  .ms-name { font-size: 12px; }
  .welcome { padding-inline: 12px; }
  .suggest-card { padding-inline: 13px; }
  .tool-btn { width: 31px; }
}

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