/* ========== 设计基调：仿 Kimi 官网的浅色极简 ========== */
:root {
  --bg: #fafaf9;
  --card: #ffffff;
  --border: #e8e6e3;
  --border-strong: #d9d6d1;
  --text: #1c1917;
  --text-soft: #57534e;
  --muted: #8a8580;
  --accent: #1c1917;
  --accent-hover: #000000;
  --accent-soft: #f5f4f2;
  --danger: #c2410c;
  --danger-soft: #fdf3ee;
  --ok: #15803d;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(28, 25, 23, 0.04), 0 4px 16px rgba(28, 25, 23, 0.05);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
    -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.75;
  letter-spacing: 0.01em;
}

h1, h2, h3 { margin: 0; line-height: 1.4; }
p { margin: 0; }
code { font-family: var(--mono); font-size: 0.9em; }

/* ========== 顶部导航 ========== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 32px;
  height: 60px;
  background: rgba(250, 250, 249, 0.82);
  backdrop-filter: blur(14px) saturate(1.5);
  -webkit-backdrop-filter: blur(14px) saturate(1.5);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.6) inset, 0 6px 16px -12px rgba(28, 25, 23, 0.12);
}

.brand { display: flex; align-items: center; gap: 11px; min-width: 0; }

.brand-logo {
  height: 38px;
  width: auto;
  display: block;
  flex: none;
}

.brand-text {
  display: flex;
  align-items: baseline;
  gap: 12px;
  min-width: 0;
}

.brand-text b {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text);
  white-space: nowrap;
}

.brand-divider {
  width: 1px;
  height: 15px;
  flex: none;
  align-self: center;
  background: var(--border-strong);
}

.brand-text small {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tabs { display: flex; gap: 4px; margin-left: auto; }  /* 顶栏：品牌靠左，导航靠右 */

.tab {
  appearance: none;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--muted);
  padding: 8px 16px;
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.15s ease, background 0.15s ease;
}

.tab:hover { color: var(--text); background: var(--accent-soft); }

.tab.active {
  color: var(--card);
  background: var(--accent);
  font-weight: 600;
}

/* ================= 完成提示 Toast ================= */
#toast-root {
  position: fixed;
  top: 76px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 1000;
}

.toast {
  min-width: 300px;
  max-width: 400px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  box-shadow: 0 16px 40px -12px rgba(24, 24, 27, 0.25);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.6;
  animation: toast-in 0.3s ease;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast.success { border-left-color: var(--ok); }
.toast.warning { border-left-color: #d97706; }
.toast.error { border-left-color: var(--danger); }
.toast.leaving { opacity: 0; transform: translateX(24px); }

.toast .toast-title { font-weight: 700; margin-bottom: 2px; }
.toast.success .toast-title { color: var(--ok); }
.toast.warning .toast-title { color: #b45309; }
.toast.error .toast-title { color: var(--danger); }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(32px); }
  to { opacity: 1; transform: none; }
}

/* ========== 布局 ========== */
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 32px 96px;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fade-in 0.25s ease; }

@keyframes fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.page-head { margin-bottom: 28px; }

.page-head h1 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-head p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.9;
  max-width: 46em;
  overflow-wrap: break-word;
}

.grid { display: grid; gap: 20px; margin-bottom: 20px; }
.grid.two { grid-template-columns: 1fr 1fr; }

/* ========== 卡片 ========== */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 26px 28px;
  margin-bottom: 20px;
}

.grid .card { margin-bottom: 0; }

.card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.card-head h2 { font-size: 17px; font-weight: 650; }

.card-hint { font-size: 12.5px; color: var(--muted); letter-spacing: 0.04em; }

/* ========== 表单 ========== */
label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-soft);
  flex: 1;
  min-width: 0;
}

input, select, textarea {
  font-family: inherit;
  font-size: 14.5px;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  width: 100%;
}

textarea { resize: vertical; line-height: 1.7; }

input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(28, 25, 23, 0.08);
}

input::placeholder { color: #b5b0aa; }

.form-row { display: flex; gap: 14px; }
.form-stack { display: flex; flex-direction: column; gap: 14px; }

#import-form { display: flex; flex-direction: column; gap: 14px; }

.dropzone {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  justify-content: center;
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius-md);
  padding: 30px 20px;
  text-align: center;
  cursor: pointer;
  background: var(--bg);
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
  align-items: center;
}

.dropzone:hover { border-color: var(--accent); background: var(--accent-soft); transform: translateY(-1px); }

.dropzone input[type="file"] {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
}

.dropzone .dropzone-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 300;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--border);
}

.dropzone strong { font-size: 14.5px; color: var(--text); font-weight: 600; }
.dropzone .file-name {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: #ffffff;
  background: #dc2626;
  border: none;
  border-radius: 999px;
  padding: 4px 14px;
  box-shadow: 0 1px 2px rgba(220, 38, 38, 0.35);
  word-break: break-all;
}
.dropzone .file-name:empty { display: none; }
.dropzone small { font-size: 12.5px; color: var(--muted); }

/* 流水线运行中锁定导入卡片 */
.card.busy #import-form .dropzone,
.card.busy #import-form input,
.card.busy #import-form select {
  opacity: 0.5;
  pointer-events: none;
}
.card.busy #import-form button[type="submit"] { opacity: 0.6; cursor: not-allowed; }

/* 模板选择行在 TXT 导出时淡化 */
#template-row { transition: opacity 0.15s ease; }
#template-row.dimmed { opacity: 0.45; }
#template-row.dimmed select { pointer-events: none; }

/* ========== 按钮 ========== */
.btn {
  appearance: none;
  font-family: inherit;
  font-size: 14px;
  font-weight: 550;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 8px 18px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease,
    transform 0.1s ease, box-shadow 0.15s ease;
  white-space: nowrap;
}

.btn:hover { border-color: var(--text); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--card);
}

.btn.primary:hover { background: var(--accent-hover); box-shadow: 0 4px 12px rgba(28, 25, 23, 0.18); }

.btn.ghost { border-color: transparent; background: var(--accent-soft); color: var(--text-soft); }
.btn.ghost:hover { color: var(--text); border-color: var(--border-strong); }

.btn.danger {
  background: var(--danger-soft);
  border-color: transparent;
  color: var(--danger);
}
.btn.danger:hover { border-color: var(--danger); }

.btn.block { width: 100%; }
.btn.small { padding: 4px 12px; font-size: 13px; }

.btn-row { display: flex; flex-wrap: wrap; gap: 10px; }
.btn-row.end { justify-content: flex-end; margin-top: 18px; }

.status {
  min-height: 1.4em;
  font-size: 13px;
  color: var(--muted);
}

.note { font-size: 12.5px; color: var(--muted); margin-top: 12px; }

.empty { color: var(--muted); font-size: 14px; padding: 8px 0; }

/* ========== 整卷导出区 ========== */
.solve-missing {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  padding-top: 4px;
  border-top: 1px solid var(--border);
  margin-top: 4px;
  padding-top: 16px;
}

.solve-missing label { max-width: 120px; }

/* ========== 运行记录与事件 ========== */
.run-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 320px;
  overflow-y: auto;
}

.run-row {
  appearance: none;
  font-family: inherit;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  padding: 10px 14px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.run-row:hover { background: var(--accent-soft); }
.run-row.active { background: var(--accent-soft); border-color: var(--border-strong); }

.run-row b {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.run-row span {
  font-size: 12.5px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: flex;
  align-items: center;
  gap: 6px;
}

.run-badge {
  font-style: normal;
  font-size: 11.5px;
  font-weight: 600;
  padding: 1px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--text-soft);
}
.run-badge.succeeded { color: var(--ok); background: #f0f9f1; }
.run-badge.failed { color: var(--danger); background: var(--danger-soft); }
.run-badge.running { color: #2563eb; background: #eff6ff; }
.run-badge.degraded { color: #b45309; background: #fffbeb; }

.event-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 320px;
  overflow-y: auto;
}

.event {
  display: grid;
  grid-template-columns: minmax(90px, auto) auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg);
}

.event code {
  color: var(--text-soft);
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.event .event-msg {
  min-width: 0;
  color: var(--text-soft);
  overflow-wrap: anywhere;
}
.event b { font-family: var(--mono); font-size: 12px; color: var(--muted); font-weight: 500; white-space: nowrap; }

.event .event-status { font-size: 12px; padding: 1px 8px; border-radius: 999px; background: var(--accent-soft); color: var(--text-soft); white-space: nowrap; }
.event .event-status.ok, .event .event-status.done, .event .event-status.success, .event .event-status.succeeded { color: var(--ok); background: #f0f9f1; }
.event .event-status.error, .event .event-status.failed { color: var(--danger); background: var(--danger-soft); }
.event .event-status.running { color: #2563eb; background: #eff6ff; }
.event .event-status.retrying, .event .event-status.degraded { color: #b45309; background: #fffbeb; }

/* ========== 组卷列表 ========== */
.paper-list { display: flex; flex-direction: column; gap: 10px; }

.paper-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.paper-row:hover { border-color: var(--border-strong); box-shadow: var(--shadow); }

.paper-row b { font-size: 15px; font-weight: 600; display: block; }
.paper-row small { font-size: 12.5px; color: var(--muted); }
.paper-actions { display: flex; gap: 8px; flex: none; }

/* ========== 题库工具栏 ========== */
.toolbar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 20px;
}

.toolbar select, .toolbar input { width: auto; flex: 1; min-width: 140px; }
.toolbar .btn { flex: none; }

/* ========== 题目卡片 ========== */
.question-list { display: flex; flex-direction: column; gap: 14px; }

.question-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  transition: border-color 0.15s ease;
}

.question-card:hover { border-color: var(--border-strong); }

.question-card > header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.question-card h3 { font-size: 14.5px; font-weight: 600; color: var(--text-soft); }

.question-images {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;  /* 与图注的居中保持一致，避免左右错开 */
  gap: 10px;
  margin: 8px 0 2px;
}

.question-images img {
  max-height: 180px;
  max-width: min(320px, 100%);
  object-fit: contain;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px;
}

.image-caption {
  font-size: 12.5px;
  color: var(--muted);
  text-align: center;
  margin: 2px 0 4px;
}

.tags { display: flex; flex-wrap: wrap; gap: 6px; }

.tags span {
  font-size: 12px;
  color: var(--text-soft);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 2px 10px;
  white-space: nowrap;
}

.tags span.tag-type { background: var(--accent); color: var(--card); font-weight: 550; }

.question-content summary {
  cursor: pointer;
  font-size: 14px;
  color: var(--text-soft);
  list-style: none;
  display: flex;
  gap: 8px;
  align-items: baseline;
}

.question-content summary::before {
  content: "▸";
  color: var(--muted);
  font-size: 12px;
  flex: none;
  transition: transform 0.15s ease;
}

.question-content[open] summary::before { transform: rotate(90deg); }
.question-content summary::-webkit-details-marker { display: none; }

.question-content-body { margin-top: 12px; }

/* 题干里的换行（如选择题选项逐行）需要在卡片和详情两处都生效 */
.stem {
  white-space: pre-wrap;
  word-break: break-word;
}

.question-content-body .stem {
  font-size: 14.5px;
  color: var(--text);
}

.md-table {
  border-collapse: collapse;
  margin: 10px 0;
  font-size: 13.5px;
  background: var(--card);
}

.md-table th,
.md-table td {
  border: 1px solid var(--border-strong);
  padding: 5px 14px;
  text-align: center;
  white-space: nowrap;
}

.md-table th {
  background: var(--accent-soft);
  font-weight: 600;
}

.answer-details {
  margin-top: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  padding: 10px 14px;
}

.answer-details summary {
  cursor: pointer;
  font-size: 13.5px;
  font-weight: 550;
  color: var(--text-soft);
}

.answer-details p { font-size: 14px; margin-top: 8px; white-space: pre-wrap; word-break: break-word; }
.answer-details ol { margin: 8px 0 0; padding-left: 20px; font-size: 14px; }
.answer-details li { margin-bottom: 4px; }

.missing-answer { margin-top: 12px; font-size: 13px; color: var(--danger); }

.question-actions { margin-top: 12px; display: flex; justify-content: flex-end; }

/* ========== 编辑对话框 ========== */
.edit-dialog {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 48px rgba(28, 25, 23, 0.18);
  padding: 26px 28px;
  width: min(640px, calc(100vw - 48px));
  background: var(--card);
  color: var(--text);
}

.edit-dialog::backdrop { background: rgba(28, 25, 23, 0.35); backdrop-filter: blur(2px); }

/* ========== 响应式 ========== */
@media (max-width: 860px) {
  .grid.two { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
    height: auto;
    padding: 14px 20px;
    gap: 10px;
  }
  .tabs { flex-wrap: wrap; }
  .container { padding: 24px 16px 72px; }
  .card { padding: 20px; }
  .form-row { flex-direction: column; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .toolbar select, .toolbar input { width: 100%; }
  .paper-row { flex-direction: column; align-items: flex-start; }
}