:root {
  --ink: #1a2033;
  --ink-soft: #5a6275;
  --line: #e5e8f0;
  --bg: #f4f5fa;
  --card: #ffffff;
  --brand: #4f46e5;
  --brand-2: #7c3aed;
  --brand-soft: #eef0ff;
  --ok: #0d9f6e;
  --warn: #c27803;
  --danger: #d0342c;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(23, 26, 43, 0.05), 0 8px 24px -12px rgba(23, 26, 43, 0.12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* —— 头部 —— */
.hero {
  background: linear-gradient(135deg, #312e81 0%, #4f46e5 55%, #7c3aed 100%);
  color: #fff;
  padding: 44px 0 40px;
}
.hero h1 { margin: 0; font-size: 32px; letter-spacing: 0.5px; }
.hero .logo { font-size: 28px; }
.tagline { margin: 10px 0 6px; font-size: 17px; font-weight: 600; opacity: 0.95; }
.sub { margin: 0; max-width: 760px; font-size: 14px; opacity: 0.82; }

/* —— 卡片 —— */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px 24px;
  margin: 22px 0;
}
.card h2 { margin: 0 0 14px; font-size: 18px; }
.hidden { display: none !important; }

/* —— 输入区 —— */
.sample-row { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.sample-label { font-size: 13px; color: var(--ink-soft); }
.sample-btns { display: flex; gap: 8px; flex-wrap: wrap; }
.sample-btn {
  border: 1px solid var(--line); background: var(--brand-soft); color: var(--brand);
  border-radius: 999px; padding: 5px 14px; font-size: 13px; cursor: pointer; font-weight: 600;
}
.sample-btn:hover { background: #e2e4ff; }
.sample-btn.active { background: var(--brand); color: #fff; }
.upload-btn {
  font-size: 13px; color: var(--ink-soft); cursor: pointer; text-decoration: underline dotted;
  margin-left: auto;
}

textarea {
  width: 100%; min-height: 170px; resize: vertical;
  border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px;
  font: 13px/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--ink); background: #fbfbfe;
}
textarea:focus { outline: 2px solid var(--brand-soft); border-color: var(--brand); }

.opts { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; margin-top: 12px; font-size: 14px; }
.opts label { color: var(--ink-soft); display: inline-flex; align-items: center; gap: 6px; }
.opts select { border: 1px solid var(--line); border-radius: 8px; padding: 5px 8px; font-size: 13px; }

/* —— 按钮 —— */
.btn {
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  border-radius: 10px; padding: 9px 18px; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: 0.15s;
}
.btn:hover { border-color: var(--brand); color: var(--brand); }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover { background: #4338ca; }
.btn.ghost { background: transparent; }
.btn.small { padding: 5px 12px; font-size: 13px; border-radius: 8px; }
.btn.danger { color: var(--danger); }
.btn.danger:hover { border-color: var(--danger); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

/* —— 工具条 / 表格 —— */
.toolbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.add-form { display: flex; gap: 8px; flex-wrap: wrap; width: 100%; margin-top: 6px; }
.add-form input {
  border: 1px solid var(--line); border-radius: 8px; padding: 7px 10px; font-size: 14px;
}
.add-form input#add-term { width: 220px; }
.add-form input#add-zh { width: 260px; }

.stats { font-size: 13px; font-weight: 500; color: var(--ink-soft); margin-left: 8px; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12.5px; color: var(--ink-soft); font-weight: 600; white-space: nowrap; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #fafaff; }

.term-cell strong { font-size: 14.5px; }
.freq-badge {
  display: inline-block; min-width: 26px; text-align: center;
  background: var(--brand-soft); color: var(--brand);
  border-radius: 6px; padding: 1px 7px; font-size: 12.5px; font-weight: 700;
}
.domain-badge {
  display: inline-block; border-radius: 999px; padding: 2px 10px;
  font-size: 12px; font-weight: 600; background: #f0f1f5; color: var(--ink-soft); white-space: nowrap;
}
.domain-badge[data-domain="生物"] { background: #e6f7ef; color: #0b7a54; }
.domain-badge[data-domain="量子计算"] { background: #eef0ff; color: #4338ca; }
.domain-badge[data-domain="机器学习"] { background: #fff3e0; color: #b25e09; }
.domain-badge[data-domain="数学"], .domain-badge[data-domain="物理"], .domain-badge[data-domain="化学"], .domain-badge[data-domain="天文"], .domain-badge[data-domain="计算机"] { background: #e0f2fe; color: #0369a1; }

.zh-input {
  width: 100%; min-width: 150px; max-width: 260px;
  border: 1px solid var(--line); border-radius: 8px; padding: 6px 9px; font-size: 14px;
  color: var(--ink);
}
.zh-input:focus { outline: 2px solid var(--brand-soft); border-color: var(--brand); }
.zh-input.composed { border-style: dashed; color: var(--warn); }
.zh-input.unmatched { border-style: dashed; }
.zh-locked { font-weight: 600; }

.src-badge { display: inline-block; border-radius: 6px; padding: 2px 8px; font-size: 12px; font-weight: 600; white-space: nowrap; }
.src-badge[data-src="locked"] { background: #fef3c7; color: #92400e; }
.src-badge[data-src="dict"] { background: #e6f7ef; color: #0b7a54; }
.src-badge[data-src="composed"] { background: #fff7e6; color: #b25e09; }
.src-badge[data-src="unmatched"] { background: #fdecec; color: #b91c1c; }
.src-badge[data-src="manual"] { background: #eef0ff; color: #4338ca; }

.ctx { font-size: 12.5px; color: var(--ink-soft); max-width: 300px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

.icon-btn {
  border: none; background: transparent; cursor: pointer; font-size: 15px; padding: 3px 6px; border-radius: 6px;
}
.icon-btn:hover { background: #f0f1f5; }
.icon-btn.danger:hover { background: #fdecec; }

/* —— 导出 —— */
.export-grid { display: flex; gap: 10px; flex-wrap: wrap; }

/* —— 术语库 —— */
.lib-list { list-style: none; margin: 0 0 10px; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 8px; }
.lib-list li {
  display: flex; align-items: center; gap: 10px;
  border: 1px solid var(--line); border-radius: 10px; padding: 7px 12px; font-size: 13.5px;
}
.lib-term { font-weight: 700; white-space: nowrap; }
.lib-zh { color: var(--ink-soft); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lib-empty { color: var(--ink-soft); font-size: 13.5px; }

.hint { font-size: 12.5px; color: var(--ink-soft); margin: 12px 0 0; }

/* —— 轻提示 —— */
.flash {
  position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%) translateY(16px);
  background: var(--ink); color: #fff; font-size: 14px; font-weight: 600;
  border-radius: 999px; padding: 10px 22px; opacity: 0;
  transition: 0.25s; pointer-events: none; z-index: 99; box-shadow: var(--shadow);
}
.flash.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* —— 页脚 —— */
.footer { padding: 26px 0 40px; color: var(--ink-soft); font-size: 13px; border-top: 1px solid var(--line); margin-top: 30px; background: #fff; }

@media (max-width: 640px) {
  .hero h1 { font-size: 26px; }
  .card { padding: 16px; }
}