/* ============================================================
 * app.css — 布局、毛玻璃与动效
 *
 * 颜色/圆角/字号/玻璃强度等"外观量"全部取自 theme.css 的变量，
 * 本文件只写结构与动效；想换配色请改 theme.css，不要改这里。
 *
 * 消息排版两种模式：body[data-layout="bubble"] 气泡式 / "doc" 文档式
 * ============================================================ */

:root {
  /* 结构常量（非外观）：需要改宽度在这里调 */
  --side-w: 300px;
  --msg-max: 880px;
  --header-h: 60px;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }

body {
  background: var(--bg);
  background-image: var(--bg-grad);
  background-attachment: fixed;
  color: var(--text);
  font: var(--fs)/1.75 var(--font);
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

.hidden { display: none !important; }
code { font-family: var(--mono); font-size: .92em; }
::selection { background: var(--accent); color: var(--accent-contrast); }

/* 细滚动条 */
* { scrollbar-width: thin; scrollbar-color: var(--border) transparent; }
*::-webkit-scrollbar { width: 9px; height: 9px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--text-2) 45%, transparent);
  border: 2px solid transparent;
  background-clip: padding-box;
  border-radius: 99px;
}
*::-webkit-scrollbar-thumb:hover { background-color: color-mix(in srgb, var(--accent) 70%, transparent); }

/* ---------- 背景装饰光斑（毛玻璃的透底来源） ---------- */
.bg-decor { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.orb { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .9; will-change: transform; }
.orb-1 { width: 46vw; height: 46vw; left: -12vw; top: -14vw; background: var(--glow-1); animation: drift 26s var(--ease) infinite alternate; }
.orb-2 { width: 38vw; height: 38vw; right: -10vw; top: 6vh; background: var(--glow-2); animation: drift 32s var(--ease) infinite alternate-reverse; }
.orb-3 { width: 42vw; height: 42vw; left: 28vw; bottom: -22vw; background: var(--glow-3); animation: drift 38s var(--ease) infinite alternate; }
@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(6vw, 5vh, 0) scale(1.14); }
}

/* ---------- 毛玻璃基座 ---------- */
.glass {
  background: var(--panel);
  background: color-mix(in srgb, var(--panel) calc(var(--glass-alpha) * 100%), transparent);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.7);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.7);
  border: 1px solid var(--glass-border);
  box-shadow: inset 0 1px 0 var(--glass-hi), var(--shadow);
}

/* ---------- 通用控件 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid var(--glass-border);
  background: var(--panel);
  background: color-mix(in srgb, var(--panel) calc((var(--glass-alpha) + .18) * 100%), transparent);
  color: var(--text);
  font: inherit;
  font-size: .94em;
  border-radius: calc(var(--radius) * .6);
  padding: 8px 15px;
  cursor: pointer;
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 2px 8px var(--glass-shade);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              background-color var(--dur) var(--ease), border-color var(--dur) var(--ease),
              filter var(--dur) var(--ease);
}
.btn i { font-size: .92em; opacity: .9; }
.btn:hover { transform: translateY(-1px); border-color: color-mix(in srgb, var(--accent) 55%, var(--border)); box-shadow: inset 0 1px 0 var(--glass-hi), 0 8px 20px var(--glass-shade); }
.btn:active { transform: translateY(0) scale(.985); }
.btn.primary {
  background: var(--accent-grad);
  border-color: transparent;
  color: var(--accent-contrast);
  box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 40%, transparent);
}
.btn.primary:hover { filter: brightness(1.06); box-shadow: 0 10px 26px color-mix(in srgb, var(--accent) 48%, transparent); }
.btn.danger { background: var(--danger); border-color: transparent; color: #fff; box-shadow: 0 6px 18px color-mix(in srgb, var(--danger) 38%, transparent); }
.btn.ghost { background: transparent; border-color: transparent; box-shadow: none; color: var(--text-2); }
.btn.ghost:hover { color: var(--text); background: color-mix(in srgb, var(--panel) 55%, transparent); }
.btn.block { width: 100%; }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; box-shadow: none; }

/* 纯图标按钮 */
.icon-btn {
  width: 38px; height: 38px; padding: 0; flex: 0 0 auto;
  border-radius: calc(var(--radius) * .55);
  font-size: 1.02em;
}

input, textarea, select {
  font: inherit;
  color: var(--text);
  background: var(--bg-soft);
  background: color-mix(in srgb, var(--bg-soft) 72%, transparent);
  border: 1px solid var(--glass-border);
  border-radius: calc(var(--radius) * .55);
  padding: 9px 12px;
  width: 100%;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
input::placeholder, textarea::placeholder { color: color-mix(in srgb, var(--text-2) 80%, transparent); }
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--ring);
  background: color-mix(in srgb, var(--panel) 80%, transparent);
}
select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-2) 50%), linear-gradient(135deg, var(--text-2) 50%, transparent 50%);
  background-position: calc(100% - 17px) calc(1em + 1px), calc(100% - 12px) calc(1em + 1px);
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 32px;
  cursor: pointer;
}
label { display: block; margin: 14px 0 4px; color: var(--text-2); font-size: .9em; }
label input, label textarea { margin-top: 6px; }
.err { color: var(--danger); min-height: 1.4em; font-size: .9em; margin: 8px 0 0; }
.sub { color: var(--text-2); font-size: .9em; }

/* ---------- 登录 / 初始化 ---------- */
.center-screen { position: relative; z-index: 1; display: flex; align-items: center; justify-content: center; height: 100%; padding: 22px; }
.auth-card {
  width: 100%; max-width: 400px;
  padding: 34px 32px 28px;
  border-radius: calc(var(--radius) * 1.2);
  animation: fade-up var(--dur-slow) var(--ease-out) both;
}
.auth-card.wide { max-width: 560px; }
.auth-card .badge {
  width: 54px; height: 54px; border-radius: 16px;
  display: grid; place-items: center;
  font-size: 1.45em; color: var(--accent-contrast);
  background: var(--accent-grad);
  box-shadow: 0 10px 24px color-mix(in srgb, var(--accent) 42%, transparent);
  margin-bottom: 16px;
  animation: pop var(--dur-slow) var(--ease-out) both .06s;
}
.auth-card h1 { margin: 0 0 6px; font-size: 1.5em; font-weight: 700; letter-spacing: .02em; }
.auth-card .sub { margin: 0 0 18px; }
.auth-card .btn { margin-top: 20px; }
.auth-card .foot { margin: 16px 0 0; text-align: center; font-size: .82em; color: var(--text-2); }
.shake { animation: shake .42s var(--ease) both; }
@keyframes shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(4px); }
  30%, 50%, 70% { transform: translateX(-7px); }
  40%, 60% { transform: translateX(7px); }
}

/* ---------- 主布局 ---------- */
#screen-app { position: relative; z-index: 1; display: flex; height: 100%; animation: fade-in var(--dur-slow) var(--ease-out) both; }

#sidebar {
  width: var(--side-w); flex: 0 0 var(--side-w);
  display: flex; flex-direction: column; gap: 12px;
  padding: 16px 14px;
  background: color-mix(in srgb, var(--sidebar) calc(var(--glass-alpha) * 100% - 8%), transparent);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.7);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.7);
  border-right: 1px solid var(--glass-border);
  box-shadow: inset 0 1px 0 var(--glass-hi), 8px 0 32px var(--glass-shade);
}
.side-head { display: flex; align-items: center; gap: 11px; padding: 4px 4px 10px; }
.brand-badge {
  width: 38px; height: 38px; flex: 0 0 auto; border-radius: 12px;
  display: grid; place-items: center; font-size: 1.05em; color: var(--accent-contrast);
  background: var(--accent-grad);
  box-shadow: 0 6px 16px color-mix(in srgb, var(--accent) 38%, transparent);
}
.logo { display: none; }
.side-title { font-weight: 700; font-size: 1.02em; letter-spacing: .03em; }
.side-sub { display: block; font-size: .74em; color: var(--text-2); font-weight: 400; letter-spacing: .06em; }

.conv-list { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 3px; padding: 2px; margin: 0 -2px; }
.conv-item {
  display: flex; align-items: center; gap: 9px;
  padding: 9px 11px;
  border-radius: calc(var(--radius) * .6);
  border: 1px solid transparent;
  cursor: pointer;
  color: var(--text-2);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease),
              transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.conv-item .ci-ico { flex: 0 0 auto; width: 22px; text-align: center; opacity: .7; font-size: .9em; }
.conv-item:hover { background: color-mix(in srgb, var(--panel) 60%, transparent); color: var(--text); transform: translateX(2px); }
.conv-item.active {
  background: color-mix(in srgb, var(--accent) 14%, var(--panel));
  border-color: color-mix(in srgb, var(--accent) 30%, transparent);
  color: var(--text);
  font-weight: 600;
  box-shadow: inset 2px 0 0 var(--accent);
}
.conv-item.active .ci-ico { opacity: 1; color: var(--accent); }
.conv-item .t { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conv-item .del {
  visibility: hidden; flex: 0 0 auto;
  width: 24px; height: 24px; padding: 0; border: none; background: none;
  color: var(--danger); cursor: pointer; font-size: .88em; border-radius: 8px;
  transition: background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.conv-item:hover .del { visibility: visible; }
.conv-item .del:hover { background: color-mix(in srgb, var(--danger) 16%, transparent); transform: scale(1.12); }

.side-foot { display: flex; gap: 7px; align-items: center; padding-top: 4px; border-top: 1px solid var(--glass-border); }
.side-foot select { width: auto; flex: 1; font-size: .88em; padding: 7px 26px 7px 10px; }

/* ---------- 主区 ---------- */
#main { flex: 1; display: flex; flex-direction: column; min-width: 0; }

#chat-header {
  display: flex; align-items: center; gap: 12px;
  height: var(--header-h); flex: 0 0 var(--header-h);
  padding: 0 18px;
  background: color-mix(in srgb, var(--panel) calc(var(--glass-alpha) * 100% - 14%), transparent);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.6);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.6);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 6px 22px var(--glass-shade);
  position: relative; z-index: 5;
}
#conv-title {
  flex: 1; min-width: 0; font-weight: 700; cursor: pointer;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 1.02em;
}
#conv-title::after {
  content: "\f044"; font-family: "Font Awesome 6 Free"; font-weight: 900;
  font-size: .72em; color: var(--text-2); margin-left: 9px; opacity: 0;
  transition: opacity var(--dur) var(--ease);
}
#conv-title:hover::after { opacity: .8; }
#model-select { width: auto; max-width: 230px; font-size: .88em; padding: 7px 30px 7px 12px; border-radius: 99px; }
#btn-menu { display: none; }
.model-wrap { position: relative; display: flex; align-items: center; }
.model-wrap > i { position: absolute; left: 12px; font-size: .8em; color: var(--text-2); pointer-events: none; }
.model-wrap #model-select { padding-left: 30px; }

/* ---------- 消息区 ---------- */
#messages { flex: 1; overflow-y: auto; padding: 26px 0 14px; }
.msg-wrap { max-width: var(--msg-max); margin: 0 auto; padding: 0 22px; }
.msg-row {
  max-width: var(--msg-max);
  margin: 0 auto 14px;
  padding: 0 22px;
  display: flex; gap: 12px;
  animation: msg-in var(--dur-slow) var(--ease-out) both;
}
.avatar {
  flex: 0 0 auto; width: 34px; height: 34px; border-radius: 11px;
  display: grid; place-items: center; font-size: .9em;
  background: color-mix(in srgb, var(--panel) 78%, transparent);
  border: 1px solid var(--glass-border);
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 4px 12px var(--glass-shade);
  color: var(--accent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.msg-row.user .avatar { background: var(--accent-grad); color: var(--accent-contrast); border-color: transparent; }

.msg { min-width: 0; max-width: 100%; }
.msg-head { display: flex; align-items: baseline; gap: 8px; font-size: .76em; color: var(--text-2); margin: 0 0 5px 2px; letter-spacing: .08em; }
.msg-head .who { font-weight: 700; color: var(--text); }

/* 气泡模式 */
body[data-layout="bubble"] .msg-row { align-items: flex-start; }
body[data-layout="bubble"] .msg-row .msg-body {
  padding: 12px 16px;
  border-radius: calc(var(--radius) * .9);
  border-top-left-radius: 6px;
  background: color-mix(in srgb, var(--ai-bubble) calc(var(--glass-alpha) * 100%), transparent);
  -webkit-backdrop-filter: blur(calc(var(--glass-blur) * .6)) saturate(1.5);
  backdrop-filter: blur(calc(var(--glass-blur) * .6)) saturate(1.5);
  border: 1px solid var(--glass-border);
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 6px 20px var(--glass-shade);
}
body[data-layout="bubble"] .msg-row.user { flex-direction: row-reverse; }
body[data-layout="bubble"] .msg-row.user .msg { text-align: initial; }
body[data-layout="bubble"] .msg-row.user .msg-body {
  background: var(--accent-grad);
  color: var(--user-bubble-text);
  border-color: transparent;
  border-top-left-radius: calc(var(--radius) * .9);
  border-top-right-radius: 6px;
  box-shadow: 0 8px 22px color-mix(in srgb, var(--accent) 34%, transparent);
}
body[data-layout="bubble"] .msg-row.user .msg-head { justify-content: flex-end; }
body[data-layout="bubble"] .msg-row.user .msg-body a { color: inherit; text-decoration: underline; }
body[data-layout="bubble"] .msg-body { max-width: min(720px, 78vw); }

/* 文档模式（全宽，适合长回答） */
body[data-layout="doc"] .msg-row { border-bottom: 1px dashed var(--border); padding: 12px 22px; }
body[data-layout="doc"] .msg { max-width: 100%; }
body[data-layout="doc"] .msg-head::before { content: "\f4ad"; font-family: "Font Awesome 6 Free"; font-weight: 900; margin-right: 6px; opacity: .5; }

/* 正文排版 */
.msg .content { overflow-wrap: break-word; }
.msg .content > *:first-child { margin-top: 0; }
.msg .content > *:last-child { margin-bottom: 0; }
.msg .content h1, .msg .content h2, .msg .content h3, .msg .content h4 { margin: 1.1em 0 .5em; line-height: 1.4; font-weight: 700; }
.msg .content h1 { font-size: 1.3em; } .msg .content h2 { font-size: 1.18em; } .msg .content h3 { font-size: 1.08em; }
.msg .content p { margin: .55em 0; }
.msg .content ul, .msg .content ol { margin: .55em 0; padding-left: 1.5em; }
.msg .content li { margin: .2em 0; }
.msg .content pre {
  position: relative;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * .55);
  padding: 13px 14px;
  overflow-x: auto;
  font-size: .88em;
  line-height: 1.6;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .05);
}
.msg .content code { background: color-mix(in srgb, var(--code-bg) 80%, transparent); padding: 1px 6px; border-radius: 5px; border: 1px solid var(--border); }
.msg .content pre code { background: none; padding: 0; border: none; }
.msg .content table { border-collapse: collapse; width: 100%; font-size: .92em; }
.msg .content th, .msg .content td { border: 1px solid var(--border); padding: 6px 11px; }
.msg .content th { background: color-mix(in srgb, var(--bg-soft) 70%, transparent); }
.msg .content blockquote {
  margin: .7em 0; padding: 6px 14px;
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  color: var(--text-2);
}
.msg .content a { color: var(--accent); }
.msg .content img { max-width: 100%; border-radius: calc(var(--radius) * .5); }
.msg .content hr { border: none; border-top: 1px dashed var(--border); margin: 1em 0; }

/* 操作条 */
.msg .actions {
  margin-top: 7px; display: flex; gap: 6px;
  opacity: 0; transform: translateY(3px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.msg-row:hover .actions, .msg-row:focus-within .actions { opacity: 1; transform: none; }
@media (hover: none) { .msg .actions { opacity: 1; transform: none; } }
.msg .actions button {
  display: inline-flex; align-items: center; gap: 5px;
  border: 1px solid transparent; background: none;
  color: var(--text-2); cursor: pointer;
  font: inherit; font-size: .78em; padding: 3px 9px; border-radius: 99px;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.msg .actions button:hover { color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); border-color: color-mix(in srgb, var(--accent) 26%, transparent); }
.msg .error-tip { color: var(--danger); font-size: .86em; margin-top: 8px; display: flex; align-items: center; gap: 6px; }

/* 流式光标与打字指示器 */
.cursor-blink { animation: blink 1.05s steps(2) infinite; color: var(--accent); }
@keyframes blink { to { opacity: 0; } }
.dots { display: inline-flex; gap: 5px; align-items: center; height: 1.4em; }
.dots i { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); opacity: .35; animation: bounce 1.15s var(--ease) infinite; }
.dots i:nth-child(2) { animation-delay: .16s; }
.dots i:nth-child(3) { animation-delay: .32s; }
@keyframes bounce { 0%, 60%, 100% { transform: translateY(0); opacity: .32; } 30% { transform: translateY(-6px); opacity: 1; } }

.msg-edit { display: flex; flex-direction: column; gap: 8px; max-width: min(720px, 78vw); }
.msg-edit textarea { min-height: 70px; }
.msg-edit .row-btns { margin-top: 0; }

/* 空状态 */
.empty-state {
  max-width: var(--msg-max); margin: 6vh auto 0; padding: 0 22px;
  text-align: center; color: var(--text-2);
  animation: fade-up var(--dur-slow) var(--ease-out) both;
}
.empty-badge {
  width: 74px; height: 74px; margin: 0 auto 18px; border-radius: 24px;
  display: grid; place-items: center; font-size: 1.7em; color: var(--accent);
  background: color-mix(in srgb, var(--panel) 70%, transparent);
  border: 1px solid var(--glass-border);
  box-shadow: inset 0 1px 0 var(--glass-hi), var(--shadow);
  position: relative;
}
.empty-badge::after {
  content: ""; position: absolute; inset: -6px; border-radius: 30px;
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  animation: halo 2.6s var(--ease) infinite;
}
@keyframes halo { 0% { transform: scale(.94); opacity: .8; } 70% { transform: scale(1.12); opacity: 0; } 100% { opacity: 0; } }
.empty-state h2 { margin: 0 0 6px; font-size: 1.2em; color: var(--text); font-weight: 700; }
.empty-state p { margin: 0 0 16px; font-size: .92em; }
.hint-chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.hint-chips span {
  font-size: .8em; padding: 5px 12px; border-radius: 99px;
  border: 1px solid var(--glass-border);
  background: color-mix(in srgb, var(--panel) 55%, transparent);
  box-shadow: inset 0 1px 0 var(--glass-hi);
}
.hint-chips i { margin-right: 6px; color: var(--accent); }

/* ---------- 输入区 ---------- */
#composer {
  flex: 0 0 auto;
  display: flex; gap: 10px; align-items: flex-end;
  max-width: calc(var(--msg-max) + 24px); width: 100%;
  margin: 0 auto; padding: 12px 22px 20px;
}
#composer .composer-inner {
  flex: 1; display: flex; gap: 10px; align-items: flex-end;
  padding: 8px 8px 8px 14px;
  border-radius: calc(var(--radius) * 1.1);
  background: color-mix(in srgb, var(--panel) calc(var(--glass-alpha) * 100% - 4%), transparent);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.7);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.7);
  border: 1px solid var(--glass-border);
  box-shadow: inset 0 1px 0 var(--glass-hi), var(--shadow-lg);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
#composer .composer-inner:focus-within {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--glass-border));
  box-shadow: inset 0 1px 0 var(--glass-hi), var(--shadow-lg), 0 0 0 4px var(--ring);
}
#composer #input {
  flex: 1; max-height: 180px; resize: none; border: none; background: transparent;
  padding: 8px 0; box-shadow: none;
}
#composer #input:focus { outline: none; box-shadow: none; background: transparent; }
#btn-send, #btn-stop { min-width: 44px; height: 40px; border-radius: 12px; padding: 0 14px; }
.composer-tip { text-align: center; font-size: .74em; color: var(--text-2); padding: 0 0 8px; opacity: .8; }

/* ---------- 设置弹窗 ---------- */
.modal {
  position: fixed; inset: 0; z-index: 50; padding: 18px;
  display: flex; align-items: center; justify-content: center;
  background: color-mix(in srgb, var(--bg) 40%, rgba(6, 8, 14, .55));
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  animation: fade-in var(--dur) var(--ease) both;
}
.modal-box {
  width: 100%; max-width: 680px; max-height: 86vh;
  display: flex; flex-direction: column;
  border-radius: calc(var(--radius) * 1.1);
  background: color-mix(in srgb, var(--panel) calc((var(--glass-alpha) + .22) * 100%), transparent);
  -webkit-backdrop-filter: blur(calc(var(--glass-blur) * 1.3)) saturate(1.8);
  backdrop-filter: blur(calc(var(--glass-blur) * 1.3)) saturate(1.8);
  border: 1px solid var(--glass-border);
  box-shadow: inset 0 1px 0 var(--glass-hi), var(--shadow-lg);
  animation: pop-in var(--dur-slow) var(--ease-out) both;
}
.modal-head { display: flex; align-items: center; gap: 12px; justify-content: space-between; padding: 12px 16px; border-bottom: 1px solid var(--glass-border); }
.modal-body { padding: 18px; overflow-y: auto; }
.tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.tabs button {
  display: inline-flex; align-items: center; gap: 7px;
  border: 1px solid transparent; background: none;
  color: var(--text-2); padding: 7px 13px; border-radius: 99px;
  cursor: pointer; font: inherit; font-size: .92em;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.tabs button:hover { color: var(--text); background: color-mix(in srgb, var(--panel) 60%, transparent); }
.tabs button.active {
  background: color-mix(in srgb, var(--accent) 16%, var(--panel));
  border-color: color-mix(in srgb, var(--accent) 34%, transparent);
  color: var(--text); font-weight: 700;
}
.tabs button.active i { color: var(--accent); }

.model-row { display: grid; grid-template-columns: 1fr 1fr auto; gap: 9px; align-items: center; margin-bottom: 9px; }
.model-row .radio-cell { white-space: nowrap; color: var(--text-2); font-size: .85em; }
.model-row input[type="radio"] { width: auto; }
.model-row input[type="text"], .model-row input:not([type]) { font-family: var(--mono); font-size: .88em; }
.row-btns { display: flex; gap: 9px; margin-top: 14px; flex-wrap: wrap; }
.section-title { margin: 20px 0 8px; font-size: .82em; letter-spacing: .1em; color: var(--text-2); font-weight: 700; display: flex; align-items: center; gap: 7px; }
.section-title i { color: var(--accent); }
.section-title:first-child { margin-top: 0; }

.color-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 11px; }
.color-cell {
  display: flex; align-items: center; gap: 9px; font-size: .85em; color: var(--text-2);
  padding: 6px 9px; border-radius: calc(var(--radius) * .5);
  border: 1px solid var(--glass-border);
  background: color-mix(in srgb, var(--panel) 45%, transparent);
  transition: border-color var(--dur) var(--ease);
}
.color-cell:hover { border-color: color-mix(in srgb, var(--accent) 40%, transparent); }
.color-cell input[type="color"] { width: 36px; height: 30px; padding: 2px; flex: 0 0 auto; border-radius: 8px; }
.range-cell { display: flex; align-items: center; gap: 12px; margin: 12px 0; }
.range-cell span { flex: 0 0 130px; color: var(--text-2); font-size: .9em; }
.range-cell input[type="range"] { flex: 1; padding: 0; accent-color: var(--accent); }

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 34px; z-index: 99;
  transform: translateX(-50%);
  padding: 11px 20px; border-radius: 99px;
  font-size: .92em;
  background: color-mix(in srgb, var(--panel) calc((var(--glass-alpha) + .1) * 100%), transparent);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.7);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.7);
  border: 1px solid var(--glass-border);
  box-shadow: inset 0 1px 0 var(--glass-hi), var(--shadow-lg);
  animation: toast-in var(--dur-slow) var(--ease-out) both;
}

/* ---------- 移动端侧栏抽屉 ---------- */
.side-mask {
  position: fixed; inset: 0; z-index: 39;
  background: rgba(6, 8, 14, .45);
  -webkit-backdrop-filter: blur(2px); backdrop-filter: blur(2px);
  animation: fade-in var(--dur) var(--ease) both;
}
/* 宽屏下侧栏常驻，遮罩永不出现 */
@media (min-width: 861px) { .side-mask { display: none !important; } }

@media (max-width: 860px) {
  :root { --side-w: 84vw; --header-h: 56px; }
  #sidebar {
    position: fixed; inset: 0 auto 0 0; z-index: 40;
    transform: translateX(-104%);
    transition: transform var(--dur-slow) var(--ease-out);
    background: color-mix(in srgb, var(--sidebar) 92%, transparent);
  }
  #sidebar.open { transform: none; box-shadow: var(--shadow-lg); }
  #btn-menu { display: inline-flex; }
  .msg-row, .msg-wrap { padding: 0 14px; }
  body[data-layout="bubble"] .msg-body { max-width: 84vw; }
  #composer { padding: 10px 12px 16px; }
  #composer .composer-inner { padding: 7px 7px 7px 12px; }
  #model-select { max-width: 150px; }
  .modal-box { max-height: 92vh; }
  .tabs button { padding: 6px 10px; font-size: .86em; }
  .tabs button .tab-text { display: none; }
  .tabs button.active .tab-text { display: inline; }
}

/* ---------- 进场动画 ---------- */
@keyframes msg-in { from { opacity: 0; transform: translateY(10px) scale(.99); } to { opacity: 1; transform: none; } }
@keyframes fade-up { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes pop { from { opacity: 0; transform: scale(.8); } to { opacity: 1; transform: scale(1); } }
@keyframes pop-in { from { opacity: 0; transform: translateY(12px) scale(.97); } to { opacity: 1; transform: none; } }
@keyframes toast-in { from { opacity: 0; transform: translate(-50%, 14px); } to { opacity: 1; transform: translate(-50%, 0); } }

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .orb { animation: none !important; }
}