/* ==========================================================================
   Liuye AI —— 深空玻璃拟态主题
   层次：极光背景层（fixed）→ 星光层（fixed）→ 玻璃面板层
   全站无内联脚本/样式，颜色一律走变量。
   ========================================================================== */

:root {
  --bg-deep: #05070f;
  --ink: #e8f0ff;
  --ink-dim: #8ea3c8;
  --ink-faint: #5b6d92;
  --glass: rgba(148, 178, 255, 0.055);
  --glass-strong: rgba(148, 178, 255, 0.1);
  --glass-border: rgba(160, 190, 255, 0.14);
  --glass-border-soft: rgba(160, 190, 255, 0.08);
  --accent-a: #22d3ee;
  --accent-b: #818cf8;
  --accent-c: #c084fc;
  --accent-grad: linear-gradient(120deg, var(--accent-a), var(--accent-b) 55%, var(--accent-c));
  --danger: #f87171;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --sidebar-w: 292px;
  --chat-max: 880px;
  --font:
    "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", -apple-system,
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "SFMono-Regular", ui-monospace, "JetBrains Mono", Consolas, monospace;
}

* { box-sizing: border-box; }

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

body {
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--ink);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ---------- 背景：极光 + 星光 ---------- */

.aurora {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  background:
    radial-gradient(1200px 700px at 85% -10%, rgba(129, 140, 248, 0.16), transparent 60%),
    radial-gradient(1000px 800px at -10% 110%, rgba(34, 211, 238, 0.1), transparent 60%),
    var(--bg-deep);
}

.aurora__blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
  will-change: transform;
}

.aurora__blob--a {
  width: 46vw;
  height: 46vw;
  left: -12vw;
  top: -14vw;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.32), transparent 65%);
  animation: drift-a 26s ease-in-out infinite alternate;
}

.aurora__blob--b {
  width: 40vw;
  height: 40vw;
  right: -10vw;
  top: 8vh;
  background: radial-gradient(circle, rgba(129, 140, 248, 0.36), transparent 65%);
  animation: drift-b 32s ease-in-out infinite alternate;
}

.aurora__blob--c {
  width: 36vw;
  height: 36vw;
  left: 30vw;
  bottom: -20vw;
  background: radial-gradient(circle, rgba(192, 132, 252, 0.28), transparent 65%);
  animation: drift-c 38s ease-in-out infinite alternate;
}

@keyframes drift-a {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(9vw, 6vh) scale(1.15); }
}

@keyframes drift-b {
  from { transform: translate(0, 0) scale(1.1); }
  to { transform: translate(-8vw, 10vh) scale(0.95); }
}

@keyframes drift-c {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(-6vw, -8vh) scale(1.2); }
}

.stars {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 12% 24%, rgba(255, 255, 255, 0.55), transparent),
    radial-gradient(1px 1px at 38% 68%, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(1.5px 1.5px at 62% 12%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1px 1px at 80% 44%, rgba(255, 255, 255, 0.35), transparent),
    radial-gradient(1px 1px at 24% 82%, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(1.5px 1.5px at 90% 78%, rgba(255, 255, 255, 0.45), transparent),
    radial-gradient(1px 1px at 50% 40%, rgba(255, 255, 255, 0.3), transparent),
    radial-gradient(1px 1px at 70% 90%, rgba(255, 255, 255, 0.35), transparent);
  animation: twinkle 5s ease-in-out infinite alternate;
}

@keyframes twinkle {
  from { opacity: 0.55; }
  to { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .aurora__blob, .stars { animation: none; }
}

/* ---------- 通用玻璃件 ---------- */

.glass {
  background: var(--glass);
  border: 1px solid var(--glass-border-soft);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}

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

button {
  font-family: inherit;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

/* ---------- 应用骨架 ---------- */

.app {
  display: flex;
  height: 100vh;
  height: 100dvh;
}

/* ---------- 侧边栏 ---------- */

.sidebar {
  width: var(--sidebar-w);
  flex: 0 0 var(--sidebar-w);
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px 16px;
  border-right: 1px solid var(--glass-border-soft);
  background: rgba(8, 12, 26, 0.5);
  backdrop-filter: blur(22px) saturate(140%);
  -webkit-backdrop-filter: blur(22px) saturate(140%);
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 2px 6px;
}

.brand__mark {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  border-radius: 12px;
  background: var(--accent-grad);
  display: grid;
  place-items: center;
  font-size: 19px;
  font-weight: 700;
  color: #061018;
  box-shadow: 0 0 22px rgba(129, 140, 248, 0.45);
}

.brand__name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.4px;
}

.brand__sub {
  font-size: 11px;
  color: var(--ink-faint);
  margin-top: 2px;
}

.new-chat {
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  padding: 11px 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  background:
    linear-gradient(rgba(20, 28, 52, 0.85), rgba(20, 28, 52, 0.85)) padding-box,
    var(--accent-grad) border-box;
  transition: box-shadow 0.25s ease, transform 0.15s ease;
}

.new-chat:hover {
  box-shadow: 0 0 18px rgba(34, 211, 238, 0.25);
  transform: translateY(-1px);
}

.sidebar__label {
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 1.5px;
  padding: 0 8px;
  text-transform: uppercase;
}

.session-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 0 -4px;
  padding: 0 4px;
}

.session-list::-webkit-scrollbar { width: 6px; }
.session-list::-webkit-scrollbar-thumb {
  background: rgba(148, 178, 255, 0.16);
  border-radius: 3px;
}

.session-item {
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 9px 10px;
  background: transparent;
  color: var(--ink-dim);
  text-align: left;
  transition: background 0.15s ease, color 0.15s ease;
}

.session-item:hover {
  background: var(--glass);
  color: var(--ink);
}

.session-item--active {
  background: var(--glass-strong);
  border-color: var(--glass-border);
  color: var(--ink);
}

.session-item__title {
  flex: 1;
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.session-item__time {
  font-size: 10px;
  color: var(--ink-faint);
  flex: 0 0 auto;
}

.session-item__del {
  flex: 0 0 auto;
  border: 0;
  background: transparent;
  color: var(--ink-faint);
  font-size: 14px;
  line-height: 1;
  padding: 2px 4px;
  border-radius: 6px;
  opacity: 0;
  transition: opacity 0.15s ease, color 0.15s ease;
}

.session-item:hover .session-item__del { opacity: 1; }
.session-item__del:hover { color: var(--danger); }

.session-empty {
  padding: 18px 10px;
  font-size: 12px;
  color: var(--ink-faint);
  text-align: center;
}

.sidebar__foot {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 8px 0;
  border-top: 1px solid var(--glass-border-soft);
}

.sidebar__user {
  flex: 1;
  font-size: 13px;
  color: var(--ink-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__logout {
  border: 1px solid var(--glass-border-soft);
  background: transparent;
  color: var(--ink-faint);
  border-radius: 8px;
  padding: 5px 10px;
  font-size: 12px;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.sidebar__logout:hover {
  color: var(--ink);
  border-color: var(--glass-border);
}

/* ---------- 主区 ---------- */

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  position: relative;
}

.chat-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 34px 22px 12px;
}

.chat-scroll::-webkit-scrollbar { width: 8px; }
.chat-scroll::-webkit-scrollbar-thumb {
  background: rgba(148, 178, 255, 0.14);
  border-radius: 4px;
}

.chat-col {
  max-width: var(--chat-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-bottom: 16px;
}

/* ---------- 欢迎页 ---------- */

.welcome {
  margin: 9vh auto 0;
  max-width: 640px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.welcome__halo {
  width: 76px;
  height: 76px;
  border-radius: 24px;
  background: var(--accent-grad);
  display: grid;
  place-items: center;
  font-size: 36px;
  font-weight: 700;
  color: #061018;
  box-shadow:
    0 0 44px rgba(129, 140, 248, 0.55),
    0 0 120px rgba(34, 211, 238, 0.25);
  animation: halo-breathe 4.5s ease-in-out infinite;
}

@keyframes halo-breathe {
  0%, 100% { box-shadow: 0 0 44px rgba(129, 140, 248, 0.55), 0 0 120px rgba(34, 211, 238, 0.25); }
  50% { box-shadow: 0 0 60px rgba(129, 140, 248, 0.75), 0 0 150px rgba(34, 211, 238, 0.4); }
}

.welcome__title {
  margin: 0;
  font-size: 34px;
  font-weight: 700;
  letter-spacing: 1px;
}

.welcome__sub {
  margin: 0;
  font-size: 14px;
  color: var(--ink-dim);
  line-height: 1.8;
}

.welcome__chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 10px;
}

.chip {
  border-radius: 999px;
  padding: 9px 16px;
  font-size: 13px;
  color: var(--ink-dim);
  background: var(--glass);
  border: 1px solid var(--glass-border-soft);
  backdrop-filter: blur(12px);
  transition: color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
}

.chip:hover {
  color: var(--ink);
  border-color: rgba(129, 140, 248, 0.55);
  box-shadow: 0 0 16px rgba(129, 140, 248, 0.22);
  transform: translateY(-1px);
}

/* ---------- 消息气泡 ---------- */

.msg {
  display: flex;
  flex-direction: column;
  max-width: 100%;
}

.msg--user {
  align-items: flex-end;
}

.msg__bubble {
  border-radius: var(--radius-lg);
  padding: 13px 17px;
  line-height: 1.75;
  font-size: 14.5px;
  word-break: break-word;
  animation: msg-in 0.28s ease both;
}

@keyframes msg-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.msg--user .msg__bubble {
  max-width: 76%;
  color: #f2f7ff;
  border: 1px solid transparent;
  background:
    linear-gradient(rgba(38, 50, 92, 0.9), rgba(30, 40, 78, 0.9)) padding-box,
    var(--accent-grad) border-box;
  box-shadow: 0 4px 24px rgba(72, 96, 220, 0.22);
  border-bottom-right-radius: 8px;
}

.msg--ai .msg__bubble {
  width: 100%;
  background: var(--glass);
  border: 1px solid var(--glass-border-soft);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom-left-radius: 8px;
}

.msg--ai .msg__bubble--error {
  border-color: rgba(248, 113, 113, 0.4);
  color: #fca5a5;
}

.msg__meta {
  margin: 0 0 6px;
  font-size: 11.5px;
  color: var(--ink-faint);
}

.msg__text p { margin: 0 0 10px; }
.msg__text p:last-child { margin-bottom: 0; }
.msg__text ul, .msg__text ol { margin: 6px 0 10px; padding-left: 22px; }
.msg__text li { margin: 3px 0; }
.msg__text a { color: var(--accent-a); }
.msg__text code {
  font-family: var(--mono);
  font-size: 12.5px;
  background: rgba(148, 178, 255, 0.12);
  border-radius: 5px;
  padding: 1px 6px;
}
.msg__text pre {
  background: rgba(4, 8, 20, 0.75);
  border: 1px solid var(--glass-border-soft);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  overflow-x: auto;
}
.msg__text pre code { background: none; padding: 0; }

.md-h { font-weight: 700; color: var(--ink); }
.md-h1 { font-size: 18px; }
.md-h2 { font-size: 16.5px; }
.md-h3 { font-size: 15px; }
.md-h4 { font-size: 14px; }

.md-table-wrap { overflow-x: auto; margin: 8px 0 12px; }
.md-table {
  border-collapse: collapse;
  width: 100%;
  font-size: 13px;
}
.md-table th, .md-table td {
  border: 1px solid var(--glass-border-soft);
  padding: 7px 11px;
  text-align: left;
  white-space: nowrap;
}
.md-table th {
  background: rgba(148, 178, 255, 0.09);
  color: var(--ink);
  font-weight: 600;
}

/* 思考占位：呼吸三点 */
.msg__bubble--thinking .msg__text {
  color: var(--ink-dim);
}
.msg__bubble--thinking .msg__text::after {
  content: "";
  display: inline-block;
  width: 8px;
  height: 15px;
  margin-left: 5px;
  vertical-align: -2px;
  border-radius: 2px;
  background: var(--accent-grad);
  animation: caret-blink 0.9s steps(2) infinite;
}

@keyframes caret-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.15; }
}

/* ---------- 思维过程折叠区 ---------- */

.trace {
  margin: 0 0 10px;
  border: 1px solid var(--glass-border-soft);
  border-radius: var(--radius-sm);
  background: rgba(4, 8, 20, 0.45);
  font-size: 12.5px;
}

.trace__summary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  cursor: pointer;
  color: var(--ink-dim);
  user-select: none;
  list-style: none;
}

.trace__summary::-webkit-details-marker { display: none; }
.trace__summary::before {
  content: "◍";
  color: var(--accent-b);
}
.trace[open] .trace__summary::before { content: "◉"; }

.trace__hint {
  margin-left: auto;
  font-size: 11px;
  color: var(--ink-faint);
}

.trace__body {
  max-height: 220px;
  overflow-y: auto;
  padding: 4px 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.trace__step {
  display: flex;
  align-items: baseline;
  gap: 8px;
  color: var(--ink-dim);
  line-height: 1.6;
}

.trace__tag {
  flex: 0 0 auto;
  font-size: 10.5px;
  border-radius: 5px;
  padding: 1px 7px;
  background: rgba(129, 140, 248, 0.16);
  color: #b3bcff;
}

.trace__tag--llm { background: rgba(34, 211, 238, 0.14); color: #8fe8f5; }
.trace__tag--tool { background: rgba(192, 132, 252, 0.15); color: #ddb8ff; }

.trace__args, .trace__result { color: var(--ink-faint); font-size: 11.5px; }
.trace__think {
  flex: 1;
  color: var(--ink-faint);
  white-space: pre-wrap;
}

/* ---------- 图表卡片 ---------- */

.msg__extras {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 4px;
}

.msg__extras:empty { display: none; }

.chart-box {
  height: 320px;
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border-soft);
  background: rgba(4, 8, 20, 0.5);
  padding: 8px;
}

.chart-box__loading {
  color: var(--ink-faint);
  font-size: 12.5px;
  text-align: center;
  padding-top: 130px;
}

.chart-fallback { overflow-x: auto; }
.chart-fallback__title {
  font-size: 13px;
  color: var(--ink-dim);
  text-align: center;
}

/* ---------- 追问气泡 ---------- */

.followups {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.followup {
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 12.5px;
  color: var(--accent-a);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.25);
  transition: background 0.15s ease, box-shadow 0.2s ease;
}

.followup:hover {
  background: rgba(34, 211, 238, 0.16);
  box-shadow: 0 0 14px rgba(34, 211, 238, 0.2);
}

/* ---------- ask 选项卡片 / ask_form 表单卡片 ---------- */

.ask-card {
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  background: var(--glass);
  backdrop-filter: blur(14px);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.ask-card--answered { opacity: 0.75; }

.ask-card__question {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.ask-card__options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ask-card__option {
  display: flex;
  flex-direction: column;
  gap: 3px;
  text-align: left;
  border: 1px solid var(--glass-border-soft);
  border-radius: var(--radius-sm);
  background: rgba(8, 12, 26, 0.4);
  color: var(--ink);
  padding: 10px 13px;
  font-size: 13.5px;
  transition: border-color 0.15s ease, box-shadow 0.2s ease;
}

.ask-card__option:hover:not(:disabled) {
  border-color: rgba(129, 140, 248, 0.55);
  box-shadow: 0 0 12px rgba(129, 140, 248, 0.18);
}

.ask-card__option--picked {
  border-color: var(--accent-a) !important;
  background: rgba(34, 211, 238, 0.1);
}

.ask-card__option-desc {
  font-size: 12px;
  color: var(--ink-faint);
}

.ask-card__other {
  display: flex;
  gap: 8px;
}

.ask-card__input {
  flex: 1;
  border: 1px solid var(--glass-border-soft);
  border-radius: var(--radius-sm);
  background: rgba(8, 12, 26, 0.4);
  color: var(--ink);
  padding: 8px 12px;
  font-size: 13px;
  font-family: inherit;
  outline: none;
}

.ask-card__input:focus { border-color: rgba(129, 140, 248, 0.55); }

.ask-card__send, .form-card__submit {
  border: 0;
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  color: #061018;
  background: var(--accent-grad);
}

.ask-card__picked {
  margin: 0;
  font-size: 12.5px;
  color: var(--accent-a);
}

.form-card__field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.form-card__label {
  margin: 0;
  font-size: 12.5px;
  color: var(--ink-dim);
}

.form-card__pills {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.form-card__pill {
  border-radius: 999px;
  padding: 6px 13px;
  font-size: 12.5px;
  color: var(--ink-dim);
  background: rgba(8, 12, 26, 0.4);
  border: 1px solid var(--glass-border-soft);
  transition: color 0.15s ease, border-color 0.15s ease;
}

.form-card__pill:hover:not(:disabled) { color: var(--ink); }

.form-card__pill--picked {
  color: var(--accent-a);
  border-color: var(--accent-a);
  background: rgba(34, 211, 238, 0.1);
}

.form-card--submitted { opacity: 0.75; }

/* ---------- 中断提示 ---------- */

.interrupt {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  color: var(--danger);
}

.interrupt__retry {
  border: 1px solid rgba(248, 113, 113, 0.4);
  background: transparent;
  color: var(--danger);
  border-radius: 8px;
  padding: 4px 12px;
  font-size: 12px;
}

/* ---------- 输入坞 ---------- */

.dock {
  padding: 10px 22px 18px;
}

.dock__inner {
  max-width: var(--chat-max);
  margin: 0 auto;
}

.dock__box {
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  background: rgba(10, 15, 32, 0.72);
  backdrop-filter: blur(22px) saturate(150%);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  box-shadow: 0 8px 40px rgba(2, 6, 18, 0.6);
  padding: 12px 14px 9px;
  transition: border-color 0.2s ease, box-shadow 0.25s ease;
}

.dock__box:focus-within {
  border-color: rgba(129, 140, 248, 0.5);
  box-shadow: 0 8px 40px rgba(2, 6, 18, 0.6), 0 0 24px rgba(129, 140, 248, 0.16);
}

.dock__textarea {
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-family: inherit;
  font-size: 14.5px;
  line-height: 1.6;
  resize: none;
  outline: none;
  max-height: 160px;
  padding: 2px 4px;
}

.dock__textarea::placeholder { color: var(--ink-faint); }

.dock__bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 6px;
}

.toggle-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 12px;
  color: var(--ink-faint);
  background: rgba(8, 12, 26, 0.4);
  border: 1px solid var(--glass-border-soft);
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.toggle-pill::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink-faint);
  transition: background 0.15s ease, box-shadow 0.2s ease;
}

.toggle-pill--on {
  color: var(--accent-a);
  border-color: rgba(34, 211, 238, 0.45);
  background: rgba(34, 211, 238, 0.09);
}

.toggle-pill--on::before {
  background: var(--accent-a);
  box-shadow: 0 0 8px var(--accent-a);
}

.dock__tokens {
  font-size: 11px;
  color: var(--ink-faint);
  font-family: var(--mono);
}

.dock__send {
  margin-left: auto;
  width: 38px;
  height: 38px;
  border: 0;
  border-radius: 13px;
  background: var(--accent-grad);
  color: #061018;
  font-size: 17px;
  display: grid;
  place-items: center;
  box-shadow: 0 0 16px rgba(129, 140, 248, 0.35);
  transition: box-shadow 0.2s ease, transform 0.15s ease;
}

.dock__send:hover:not(:disabled) {
  box-shadow: 0 0 26px rgba(129, 140, 248, 0.6);
  transform: translateY(-1px);
}

/* ---------- 登录页 ---------- */

.login-wrap {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px;
  overflow: auto;
}

.login-card {
  width: 380px;
  max-width: 100%;
  border-radius: 24px;
  padding: 40px 36px 34px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  background: rgba(10, 15, 32, 0.66);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(24px) saturate(150%);
  -webkit-backdrop-filter: blur(24px) saturate(150%);
  box-shadow: 0 18px 70px rgba(2, 6, 18, 0.65);
  animation: msg-in 0.4s ease both;
}

.login-card__mark {
  width: 64px;
  height: 64px;
  border-radius: 20px;
  background: var(--accent-grad);
  display: grid;
  place-items: center;
  font-size: 30px;
  font-weight: 700;
  color: #061018;
  box-shadow: 0 0 40px rgba(129, 140, 248, 0.5);
}

.login-card__title {
  margin: 0;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.login-card__sub {
  margin: -6px 0 8px;
  font-size: 12.5px;
  color: var(--ink-faint);
}

.login-card form {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.login-card input {
  width: 100%;
  border: 1px solid var(--glass-border-soft);
  border-radius: var(--radius-md);
  background: rgba(8, 12, 26, 0.5);
  color: var(--ink);
  padding: 12px 15px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.login-card input:focus {
  border-color: rgba(129, 140, 248, 0.55);
  box-shadow: 0 0 14px rgba(129, 140, 248, 0.16);
}

.login-card__submit {
  border: 0;
  border-radius: var(--radius-md);
  padding: 12px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 4px;
  color: #061018;
  background: var(--accent-grad);
  box-shadow: 0 0 20px rgba(129, 140, 248, 0.3);
  transition: box-shadow 0.2s ease, transform 0.15s ease;
}

.login-card__submit:hover:not(:disabled) {
  box-shadow: 0 0 32px rgba(129, 140, 248, 0.55);
  transform: translateY(-1px);
}

.login-card__error {
  margin: 0;
  min-height: 18px;
  font-size: 12.5px;
  color: var(--danger);
  text-align: center;
}

/* ---------- 移动端 ---------- */

.sidebar__backdrop { display: none; }
.sidebar__burger { display: none; }

@media (max-width: 900px) {
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    width: min(84vw, var(--sidebar-w));
  }

  .sidebar--open { transform: translateX(0); }

  .sidebar__backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(2, 5, 14, 0.6);
    z-index: 15;
    border: 0;
  }

  .sidebar__backdrop[hidden] { display: none; }

  .sidebar__burger {
    display: grid;
    place-items: center;
    position: fixed;
    top: 14px;
    left: 14px;
    z-index: 10;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    background: rgba(10, 15, 32, 0.7);
    backdrop-filter: blur(14px);
    color: var(--ink-dim);
    font-size: 17px;
  }

  .chat-scroll { padding-top: 64px; }
  .msg--user .msg__bubble { max-width: 88%; }
}