:root {
  --bg: #0f1217;
  --bg-soft: #151922;
  --panel: #181d27;
  --panel-2: #1d2330;
  --border: #2a3140;
  --text: #edf1f7;
  --muted: #9aa4b2;
  --accent: #48d1b9;
  --accent-2: #f5a524;
  --danger: #ff6b7a;
  --shadow: 0 16px 40px rgba(0, 0, 0, 0.32);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: linear-gradient(180deg, #0d1014 0%, #11151b 100%); color: var(--text); font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif; }
body { line-height: 1.5; letter-spacing: 0; }
body.auth-locked .app-shell { display: none; }
.auth-screen { min-height: 100vh; display: none; place-items: center; padding: 20px; background: #0d1014; }
body.auth-locked .auth-screen { display: grid; }
.auth-card { width: min(430px, 100%); padding: 28px; border: 1px solid var(--border); border-radius: 10px; background: var(--panel); box-shadow: var(--shadow); }
.auth-card h1 { margin: 6px 0; font-size: 28px; }
.auth-card > p { color: var(--muted); margin: 0 0 20px; }
.auth-card form { display: grid; gap: 14px; }
.auth-card label { display: grid; gap: 8px; }
.auth-card label span { color: var(--muted); font-size: 13px; }
.auth-submit { width: 100%; margin-top: 4px; }
.auth-status { min-height: 20px; margin: 0; color: var(--danger); font-size: 13px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.app-shell { max-width: 1600px; margin: 0 auto; padding: 20px; }
.topbar {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 16px;
  padding: 20px; border: 1px solid var(--border); border-radius: 10px; background: rgba(21, 25, 34, 0.92);
  box-shadow: var(--shadow);
}
.eyebrow { color: var(--accent); font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; }
.topbar h1 { margin: 4px 0 6px; font-size: 32px; line-height: 1.15; }
.topbar p { margin: 0; color: var(--muted); max-width: 74ch; }
.topbar-actions, .action-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

.layout { display: grid; grid-template-columns: 320px minmax(0, 1fr); gap: 18px; margin-top: 18px; }
.sidebar { display: flex; flex-direction: column; gap: 18px; }
.workspace { display: flex; flex-direction: column; gap: 18px; min-width: 0; }

.panel, .hero-band {
  background: rgba(24, 29, 39, 0.92);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
}
.panel { padding: 18px; }
.hero-band { padding: 18px; display: grid; gap: 16px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.panel h2, .side-block h4 { margin: 0; font-size: 17px; }
.muted { color: var(--muted); font-size: 12px; }

.project-list, .mini-platform-list { display: grid; gap: 10px; }
.project-item, .mini-platform-item, .platform-card, .publish-card {
  border: 1px solid var(--border);
  background: var(--panel-2);
  border-radius: 10px;
  padding: 12px;
}
.project-item.active { border-color: rgba(72, 209, 185, 0.55); }
.project-item strong, .mini-platform-item strong { display: block; margin-bottom: 3px; }
.project-item small, .mini-platform-item small, .platform-card small, .publish-card small { color: var(--muted); }

.hero-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.hero-metric { padding: 14px; border-radius: 10px; border: 1px solid var(--border); background: linear-gradient(180deg, #202633, #1a202c); }
.hero-metric span { display: block; color: var(--muted); font-size: 12px; margin-bottom: 8px; }
.hero-metric strong { font-size: 28px; }
.hero-note { border-left: 3px solid var(--accent-2); padding: 6px 0 6px 14px; }
.hero-note strong { display: block; margin-bottom: 4px; }
.hero-note p { margin: 0; color: var(--muted); }

.form-grid, .backend-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.form-grid label, .backend-grid label { display: grid; gap: 8px; }
.form-grid .full, .backend-grid .full { grid-column: 1 / -1; }
.form-grid span, .backend-grid span { color: var(--muted); font-size: 13px; }
.backend-actions { margin-top: 14px; }
input, textarea, select {
  width: 100%; border: 1px solid var(--border); border-radius: 10px; background: #11151d; color: var(--text);
  padding: 12px 13px; font: inherit; outline: none;
}
textarea { resize: vertical; min-height: 92px; }
input:focus, textarea:focus, select:focus { border-color: rgba(72, 209, 185, 0.7); box-shadow: 0 0 0 3px rgba(72, 209, 185, 0.12); }

.strategy-grid, .citation-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.platform-card { display: grid; gap: 8px; min-height: 178px; }
.platform-card h3 { margin: 0; font-size: 16px; }
.tag-row, .chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-size: 12px; color: var(--text); background: rgba(72, 209, 185, 0.08); border: 1px solid rgba(72, 209, 185, 0.22);
  padding: 5px 8px; border-radius: 999px;
}
.chip.alt { background: rgba(245, 165, 36, 0.08); border-color: rgba(245, 165, 36, 0.22); }

.tab-strip { display: flex; flex-wrap: wrap; gap: 8px; }
.tab-btn {
  border: 1px solid var(--border); background: transparent; color: var(--text); padding: 8px 11px; border-radius: 999px;
  cursor: pointer;
}
.tab-btn.active { background: rgba(72, 209, 185, 0.12); border-color: rgba(72, 209, 185, 0.35); }

.draft-layout { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.8fr); gap: 16px; }
.draft-main { min-width: 0; }
.draft-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.draft-meta span {
  font-size: 12px; border-radius: 999px; padding: 5px 8px; border: 1px solid var(--border); background: #11151d;
}
.draft-main h3 { margin: 0 0 14px; font-size: 26px; line-height: 1.25; }
.article-body { display: grid; gap: 14px; color: #dde4ee; }
.article-body h4 { margin: 0 0 8px; font-size: 15px; color: #fff; }
.article-body p, .article-body li { color: #cbd3de; }
.article-body ul { margin: 0; padding-left: 18px; }

.draft-side { display: grid; gap: 14px; }
.side-block {
  border: 1px solid var(--border); background: #11151d; border-radius: 10px; padding: 14px;
}
.side-block h4 { margin-bottom: 10px; }
.insight-item { padding: 10px 0; border-top: 1px solid rgba(42, 49, 64, 0.8); }
.insight-item:first-child { border-top: 0; padding-top: 0; }
.insight-item strong { display: block; margin-bottom: 3px; }
.insight-item small { color: var(--muted); }

.publish-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.publish-card { display: grid; gap: 8px; }
.publish-card .status { color: var(--accent); font-size: 12px; }
.publish-card .btn-row { display: flex; gap: 8px; flex-wrap: wrap; }
.publish-card.connected { border-color: rgba(72, 209, 185, 0.55); }
.citation-card {
  border: 1px solid var(--border);
  background: var(--panel-2);
  border-radius: 10px;
  padding: 12px;
  display: grid;
  gap: 8px;
}
.citation-card h3 { margin: 0; font-size: 16px; }
.citation-card p { margin: 0; color: var(--muted); font-size: 13px; }
.engine-list { display: flex; flex-wrap: wrap; gap: 6px; }
.engine-pill {
  font-size: 11px;
  color: #d9f9f3;
  border: 1px solid rgba(72, 209, 185, 0.22);
  background: rgba(72, 209, 185, 0.08);
  border-radius: 999px;
  padding: 4px 7px;
}
.research-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 14px; }
.research-card { min-width: 0; border: 1px solid var(--border); background: var(--panel-2); border-radius: 10px; padding: 13px; display: grid; gap: 8px; }
.research-card h3 { margin: 0; font-size: 15px; line-height: 1.45; }
.research-card p { margin: 0; color: var(--muted); font-size: 13px; display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; }
.research-card-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.research-card-actions a { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; }
.research-card-actions .icon { width: 14px; height: 14px; }
.research-empty, .research-note { grid-column: 1 / -1; margin: 0; }
.research-note { padding-top: 4px; }
.image-plan { border-top: 1px solid var(--border); padding-top: 14px; }
.image-plan p { margin: 6px 0; }

.doc-links { display: flex; flex-wrap: wrap; gap: 12px; }
.doc-links a {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--border); border-radius: 999px; padding: 8px 12px; background: #11151d;
}

button {
  font: inherit;
}
.icon-btn, .primary-btn, .secondary-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: 10px; border: 1px solid var(--border); background: #11151d; color: var(--text);
  padding: 10px 12px; cursor: pointer;
}
.primary-btn { background: linear-gradient(180deg, rgba(72, 209, 185, 0.22), rgba(72, 209, 185, 0.12)); border-color: rgba(72, 209, 185, 0.4); }
.secondary-btn:hover, .icon-btn:hover, .primary-btn:hover, .tab-btn:hover, .doc-links a:hover { border-color: rgba(72, 209, 185, 0.45); }

.icon {
  width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
}

@media (max-width: 1200px) {
  .layout, .draft-layout { grid-template-columns: 1fr; }
  .strategy-grid, .publish-grid, .citation-grid, .research-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .app-shell { padding: 12px; }
  .topbar, .panel, .hero-band { padding: 14px; }
  .topbar { flex-direction: column; }
  .hero-grid, .form-grid, .backend-grid, .strategy-grid, .publish-grid, .citation-grid, .research-grid { grid-template-columns: 1fr; }
  .draft-main h3 { font-size: 22px; }
}