:root {
  --ink: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --bg: #f4f6f9;
  --card: #ffffff;
  --accent: #2f5d9b;
  --accent-weak: #e8effa;
  --ok: #166534;
  --ok-weak: #eaf7ee;
  --warn: #92400e;
  --warn-weak: #fdf3e3;
  --danger: #b91c1c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
        "PingFang SC", "Hiragino Sans GB", sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

kbd {
  display: inline-block;
  min-width: 1.4em;
  padding: 0 0.35em;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: #fff;
  color: var(--muted);
  font: 12px/1.5 ui-monospace, SFMono-Regular, Consolas, monospace;
  text-align: center;
}

/* ---------- 登录 ---------- */
.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}
.login-card h1 { margin: 0 0 6px; font-size: 20px; }
.login-card .sub { margin: 0 0 18px; color: var(--muted); font-size: 13px; }
.login-card form { display: grid; gap: 14px; }
.login-card label { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
.login-card input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 15px;
}
.login-card input:focus { outline: 2px solid var(--accent-weak); border-color: var(--accent); }
.login-card .error {
  margin: 0 0 14px;
  padding: 10px 12px;
  border-radius: 8px;
  background: #fdecec;
  color: var(--danger);
  font-size: 13px;
}
.login-card .foot { margin: 18px 0 0; color: var(--muted); font-size: 12px; }

/* ---------- 顶栏与进度 ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 20px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 650; letter-spacing: 0.2px; }
.who { color: var(--muted); font-size: 13px; }
.badge {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 8px;
  border-radius: 999px;
  background: var(--accent-weak);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  vertical-align: 1px;
}
.badge.danger { background: #fdecec; color: var(--danger); }

.progress-wrap {
  max-width: 1180px;
  margin: 16px auto 0;
  padding: 0 20px;
}
.progress {
  height: 8px;
  border-radius: 999px;
  background: #e3e7ee;
  overflow: hidden;
}
.progress > div {
  height: 100%;
  width: 0;
  background: var(--accent);
  transition: width 0.2s ease;
}
.progress-text { margin-top: 6px; color: var(--muted); font-size: 13px; }
.progress-text b { color: var(--ink); }

/* ---------- 卡片 ---------- */
.card {
  max-width: 1180px;
  margin: 14px auto;
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.hint { margin: 0 0 14px; color: var(--muted); font-size: 13px; }

.banner {
  max-width: 1180px;
  margin: 12px auto 0;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 14px;
}
.banner.warn { background: var(--warn-weak); color: var(--warn); }
.banner.ok { background: var(--ok-weak); color: var(--ok); }
.banner.info { background: var(--accent-weak); color: var(--accent); }
.banner .small { margin-left: 10px; vertical-align: 1px; }

.papers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.paper {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  background: #fcfcfe;
}
.paper h2 {
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.45;
  min-height: 2.9em;
}
.abstract {
  flex: 1;
  max-height: 340px;
  overflow: auto;
  padding-right: 4px;
  color: #374151;
  font-size: 14px;
  line-height: 1.65;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.choose {
  margin-top: 12px;
  padding: 12px 14px;
  border: 1px solid var(--accent);
  border-radius: 9px;
  background: #fff;
  color: var(--accent);
  font-size: 15px;
  font-weight: 650;
  cursor: pointer;
}
.choose:hover:not(:disabled) { background: var(--accent-weak); }
.choose.selected { background: var(--accent); color: #fff; }
.choose.selected kbd { color: var(--accent); }
.choose:disabled { opacity: 0.55; cursor: not-allowed; }

.controls {
  display: flex;
  align-items: flex-end;
  gap: 14px;
  margin-top: 16px;
  flex-wrap: wrap;
}
.controls .conf { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
.controls select {
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 14px;
  background: #fff;
}
.controls .reason { flex: 1; min-width: 240px; display: grid; gap: 6px;
  font-size: 13px; color: var(--muted); }
.controls textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  font-size: 14px;
  resize: vertical;
}
.controls textarea:focus, .controls select:focus {
  outline: 2px solid var(--accent-weak);
  border-color: var(--accent);
}
.save-state { min-width: 120px; font-size: 12px; color: var(--muted); }
.save-state.ok { color: var(--ok); }
.save-state.err { color: var(--danger); }

.nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 14px;
}

button.primary, button.ghost {
  padding: 10px 16px;
  border-radius: 9px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
button.primary {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
}
button.primary:hover { filter: brightness(1.06); }
button.ghost {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}
button.ghost:hover:not(:disabled) { background: #f3f5f8; }
button.ghost:disabled { opacity: 0.5; cursor: not-allowed; }
button.small { padding: 5px 10px; font-size: 13px; margin-right: 6px; }

.done { border-color: #cfe3d6; background: var(--ok-weak); }
.done h2 { margin: 0 0 8px; font-size: 17px; color: var(--ok); }
.done-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; }

/* ---------- 管理端 ---------- */
.admin-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.progress-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.progress-table th, .progress-table td {
  padding: 9px 8px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}
.progress-table th { color: var(--muted); font-size: 12px; font-weight: 600; }

.foot {
  max-width: 1180px;
  margin: 10px auto 28px;
  padding: 0 20px;
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 860px) {
  .papers { grid-template-columns: 1fr; }
  .paper h2 { min-height: 0; }
  .abstract { max-height: 240px; }
  .topbar { align-items: flex-start; flex-direction: column; }
  .card { padding: 16px; }
  .progress-table { display: block; overflow-x: auto; }
}