/* assistant.css —— AI 学习助手（右侧抽屉）。
   几何照 codex/class-agent-matrix-takeover-20260926/web/versions/b/assistant-clone.css：
   吉祥物按钮、遮罩、400 px 抽屉、60/auto/1fr/62 四行、30 px 圆头像、气泡、术语按钮、输入条。
   配色换成本站令牌（tokens.css）：面板 --c-panel*、描边 --c-line-strong、强调 --c-blue、在线点 --c-mint。 */

:root { --assistant-w: 400px; }

/* ---- 吉祥物（右下角） ---- */
.mascot {
  /* 参考站在右下角贴底；本站的主按钮就在那个位置，所以抬到动作条上方（1366x768 下动作条约在 y 678–716） */
  position: fixed; right: 22px; bottom: 112px; z-index: 50;
  width: 66px; height: 72px;
  border: 1px solid rgba(99, 167, 255, .45);
  border-radius: 50% 50% 44% 44%;
  background: radial-gradient(circle at 50% 38%, #f6f9ff 0 29%, #cfe1ff 30% 43%, #1f4e79 45% 100%);
  box-shadow: 0 0 0 8px rgba(99, 167, 255, .10), 0 0 25px rgba(99, 167, 255, .28);
  cursor: pointer;
}
.mascot[hidden] { display: none; }
.mascot.has-new::after {
  content: ''; position: absolute; right: -2px; top: 4px; width: 14px; height: 14px; border-radius: 50%;
  background: var(--c-gold); border: 2px solid var(--c-bg); box-shadow: 0 0 10px rgba(247, 189, 57, .8);
  animation: pulse 1.1s ease-in-out infinite;
}
.mascot-ear { position: absolute; top: -9px; width: 16px; height: 28px; border-radius: 55% 55% 20% 20%; background: #d9e8ff; }
.mascot-ear.left { left: 12px; transform: rotate(-10deg); }
.mascot-ear.right { right: 12px; transform: rotate(10deg); }
.mascot-face { position: absolute; left: 50%; top: 26px; transform: translateX(-50%); color: #1f4e79; font-size: 16px; font-weight: 900; white-space: nowrap; }

/* ---- 遮罩与抽屉 ---- */
.assistant-layer { position: fixed; inset: 0; z-index: 80; }
.assistant-layer[hidden] { display: none; }
.assistant-scrim {
  position: absolute; inset: 0 var(--assistant-w) 0 0; width: calc(100% - var(--assistant-w));
  border: 0; background: rgba(4, 12, 24, .68); backdrop-filter: blur(6px); cursor: default;
  animation: assistant-scrim-in .28s ease both;
}
.assistant-drawer {
  position: absolute; top: 0; right: 0; width: var(--assistant-w); height: 100%;
  display: grid; grid-template-rows: 60px auto minmax(0, 1fr) 62px; grid-template-columns: minmax(0, 1fr); min-height: 0; min-width: 0; overflow: hidden;
  border-left: 1px solid var(--c-line-strong);
  background: var(--c-panel);
  color: var(--c-text);
  box-shadow: -22px 0 70px rgba(0, 0, 0, .45);
  animation: assistant-slide-in .34s cubic-bezier(.2, .8, .2, 1) both;
}
.assistant-drawer > header { display: flex; align-items: center; justify-content: space-between; padding: 0 18px; border-bottom: 1px solid var(--c-line-strong); }
.assistant-drawer h2 { font-size: 18px; font-weight: 400; line-height: 1.5; margin: 0; }
.assistant-drawer h2 span { color: var(--c-blue); }
.assistant-drawer > header div { display: flex; gap: 7px; }
.assistant-drawer > header button { padding: 7px 10px; border: 1px solid transparent; border-radius: 8px; background: transparent; color: var(--c-text-2); cursor: pointer; font-size: 15px; line-height: 1.5; }
.assistant-drawer > header button.active { color: var(--c-blue); border-color: rgba(99, 167, 255, .6); background: var(--c-blue-dim); }

/* ---- 上下文卡 + 预设 ---- */
.assistant-top { display: flex; flex-direction: column; gap: 0; min-height: 0; min-width: 0; }
.assistant-drawer > header, .assistant-drawer .message-list, #assistant-layer #chat-form { min-width: 0; }
.assistant-drawer .ai-preset { flex: 0 1 auto; min-width: 0; }
.assistant-drawer .message .bubble { flex: 1 1 auto; }
.context-card {
  display: flex; flex-direction: column; gap: 5px; margin: 16px 16px 8px; padding: 13px 15px;
  border: 1px solid rgba(99, 167, 255, .28); border-radius: 11px; background: var(--c-blue-dim);
}
.context-card small { color: var(--c-text-2); font-size: 12.8px; line-height: 1.5; display: flex; align-items: center; justify-content: space-between; gap: 6px; }
.context-card strong { color: var(--c-blue); font-size: 15px; line-height: 1.5; font-weight: 700; }
.context-card .ctx-tail { color: var(--c-text-2); font-weight: 400; }
.assistant-drawer .ai-presets { margin: 0 16px 6px; padding: 6px 0 2px; border-top: 0; max-height: 132px; }
.assistant-drawer .ai-presets[hidden] { display: none; }

/* ---- 消息列 ---- */
.assistant-drawer .message-list { overflow-y: auto; padding: 4px 16px 18px; display: flex; flex-direction: column; gap: 12px; min-height: 0; }
.assistant-drawer .message { display: flex; gap: 9px; align-items: flex-start; flex-shrink: 0; }
.assistant-drawer .message > span {
  flex: 0 0 30px; width: 30px; height: 30px; display: grid; place-items: center; border-radius: 50%;
  background: var(--c-blue); color: var(--c-text-on-accent); font-size: 15px; line-height: 1.5;
}
.assistant-drawer .message .bubble {
  max-width: none; margin: 0; padding: 11px 13px; border: 1px solid var(--c-line-strong); border-radius: 12px;
  background: var(--c-panel-2); color: var(--c-text); font-size: 14px; line-height: 1.7; min-width: 0; overflow-wrap: anywhere;
}
.assistant-drawer .message.ai .bubble { border-left: 1px solid var(--c-line-strong); align-self: auto; }
.assistant-drawer .message.user { flex-direction: row-reverse; }
.assistant-drawer .message.user > span { background: var(--c-panel-3); color: var(--c-gold); }
.assistant-drawer .message.user .bubble { background: var(--c-blue-dim); border-color: rgba(99, 167, 255, .35); align-self: auto; }
.assistant-drawer .message.sys { justify-content: center; }
.assistant-drawer .message.sys .bubble { align-self: auto; font-size: var(--fs-xs); color: var(--c-text-3); background: transparent; border: 1px dashed var(--c-line-strong); }
.assistant-drawer .message.pending .bubble { color: var(--c-text-3); }
.assistant-drawer .message.pending .bubble::after { content: ''; display: inline-block; width: 1.2em; text-align: left; animation: assistant-dots 1.2s steps(4, end) infinite; }
.assistant-drawer .message-keyword {
  display: inline; padding: 0; border: 0; color: var(--c-blue); background: transparent; cursor: pointer;
  font-weight: 700; font-size: inherit; line-height: inherit; font-family: inherit;
  text-decoration: underline dotted rgba(99, 167, 255, .6); text-underline-offset: 3px;
}
.assistant-drawer .message-keyword:hover, .assistant-drawer .message-keyword:focus-visible { color: #9cc7ff; text-decoration-style: solid; outline: none; }
.assistant-drawer .message-source { display: block; color: var(--c-text-3); font-size: 10.5px; line-height: 1.5; margin-top: 5px; }
.assistant-drawer .ai-offline-note { margin: 0 0 0 39px; font-size: var(--fs-xs); color: var(--c-gold); line-height: 1.6; }
.assistant-drawer .retry-reply { color: var(--c-blue); font-size: 12px; border: 1px solid rgba(99, 167, 255, .6); background: transparent; padding: 3px 9px; border-radius: 6px; margin-left: 6px; cursor: pointer; }
.assistant-drawer .ai-unvalidated-note { margin-left: 39px; }
.assistant-drawer .ai-review-sec .t { color: var(--c-blue); }

/* ---- 输入条 ---- */
#assistant-layer #chat-form {
  display: grid; grid-template-columns: minmax(0, 1fr) 42px; gap: 7px; padding: 10px 16px; margin: 0;
  border: 0; border-top: 1px solid var(--c-line-strong); align-items: stretch;
}
#assistant-layer #chat-input {
  min-width: 0; width: 100%; height: 41px; padding: 0 13px; border: 1px solid rgba(99, 167, 255, .6); border-radius: 10px; outline: none;
  background: var(--c-panel-2); color: var(--c-text); font-size: 15px; font-family: inherit;
}
#assistant-layer #chat-input::placeholder { color: var(--c-text-3); }
#assistant-layer #chat-input:focus { border-color: var(--c-blue); }
#assistant-layer #send-message { width: 42px; border: 0; border-radius: 10px; background: var(--c-blue); color: var(--c-text-on-accent); cursor: pointer; font-size: 16px; }
#assistant-layer #send-message:disabled { opacity: .4; cursor: not-allowed; }

.assistant-open { overflow: hidden; }

@keyframes assistant-scrim-in { from { opacity: 0; backdrop-filter: blur(0); } to { opacity: 1; backdrop-filter: blur(6px); } }
@keyframes assistant-slide-in { from { opacity: .35; transform: translateX(100%); } to { opacity: 1; transform: translateX(0); } }
@keyframes assistant-dots { 0% { content: ''; } 25% { content: '·'; } 50% { content: '··'; } 75% { content: '···'; } }
@media (max-width: 780px) { .assistant-drawer { width: min(100%, var(--assistant-w)); } .assistant-scrim { inset: 0; width: 100%; } }
@media (prefers-reduced-motion: reduce) { .assistant-drawer, .assistant-scrim { animation: none !important; } }

/* ---- 助教改成抽屉后，页面不再留助教栏：与助教同屏的模板收成两栏 ---- */
.tpl-chart.with-ai > .page-body { grid-template-columns: minmax(0, 30fr) minmax(0, 70fr); }
.tpl-sandbox.with-ai > .page-body { grid-template-columns: minmax(0, 70fr) minmax(0, 30fr); }
.tpl-sandbox:not(.with-ai) > .page-body { grid-template-columns: minmax(0, 1fr); }
.tpl-matrix.variant-code > .page-body { grid-template-columns: minmax(0, 46fr) minmax(0, 54fr); }
.tpl-quad > .page-body { grid-template-columns: minmax(0, 30fr) minmax(0, 35fr) minmax(0, 35fr); }
/* 这两条原来写在 components.css 里（第 7 步 74/26、第 6 步 36/38/26），此处后加载、同优先级，覆盖成没有助教栏的样子 */
.tpl-matrix.variant-qfd > .page-body { grid-template-columns: minmax(0, 1fr); }
.tpl-dialog.variant-sweep > .page-body { grid-template-columns: minmax(0, 44fr) minmax(0, 56fr); }

/* 顶栏模型下拉：只显示模型短名，别把顶栏挤变形 */
.model-pick { max-width: 230px; font-size: var(--fs-xs); background: var(--c-panel-2); color: var(--c-text-2); border: 1px solid var(--c-line-strong); border-radius: var(--r-sm); padding: 3px 6px; margin-left: 8px; }

/* ---- 原来注入在 ai-panel.js 里的样式，抽屉化后统一放这里：预设选项、Markdown 回复、三段评价、未过校验说明 ---- */
.assistant-drawer .ai-presets { display: flex; flex-wrap: wrap; gap: 6px; align-items: flex-start; max-height: 132px; overflow: auto; flex: 0 0 auto; }
.assistant-drawer .ai-presets-label { font-size: var(--fs-xs); color: var(--c-text-3); flex: 0 0 100%; }
.assistant-drawer .ai-preset { white-space: normal; text-align: left; line-height: 1.35; max-width: 100%; font-size: var(--fs-xs); }
.assistant-drawer .ai-preset.used { opacity: .55; }
.assistant-drawer .ai-preset.used::before { content: '✓ '; }
.assistant-drawer .bubble.md { white-space: normal; }
.assistant-drawer .bubble.md p { margin: 0 0 6px; }
.assistant-drawer .bubble.md p:last-child { margin-bottom: 0; }
.assistant-drawer .bubble.md .md-list { margin: 4px 0 6px 20px; padding: 0; }
.assistant-drawer .bubble.md .md-list li { margin: 2px 0; }
.assistant-drawer .bubble.md code { background: var(--c-slate-dim); border-radius: 4px; padding: 0 4px; font-family: Consolas, "Courier New", monospace; font-size: .94em; }
.assistant-drawer .bubble.md .md-pre { margin: 6px 0; padding: 7px 9px; border-radius: 6px; overflow-x: auto; background: var(--c-panel-3); border: 1px solid var(--c-line); }
.assistant-drawer .bubble.md .md-pre code { background: none; padding: 0; white-space: pre; }
.assistant-drawer .bubble.md .md-h { font-weight: 600; color: var(--c-blue); margin: 6px 0 2px; }
.assistant-drawer .bubble.md .md-quote { margin: 5px 0; padding: 2px 0 2px 9px; border-left: 2px solid var(--c-line-strong); color: var(--c-text-2); }
.assistant-drawer .bubble.md .md-hr { border: 0; border-top: 1px solid var(--c-line); margin: 8px 0; }
.assistant-drawer .ai-review-lead { font-size: .94em; color: var(--c-gold); margin-bottom: 7px; }
.assistant-drawer .ai-review-sec { margin: 0 0 9px; }
.assistant-drawer .ai-review-sec:last-child { margin-bottom: 0; }
.assistant-drawer .ai-review-sec > .t { display: inline-block; font-weight: 600; color: var(--c-blue); margin-bottom: 3px; }
.assistant-drawer .ai-review-sec:nth-child(1) > .t { color: var(--c-mint); }
.assistant-drawer .ai-review-sec:nth-child(3) > .t { color: var(--c-gold); }
.assistant-drawer .ai-review-sec > .b { padding-left: 1px; }
.assistant-drawer .ai-unvalidated-note { font-size: var(--fs-xs); line-height: 1.5; color: var(--c-text-3); }