:root {
  --bg: #0f1117;
  --panel: #171a22;
  --panel-border: #2a3040;
  --text: #e8ecf4;
  --muted: #98a2b8;
  --pink: #fb7299;
  --pink-dark: #d85a7d;
  --blue: #6cabff;
  --success: #3ddc97;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(251, 114, 153, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(108, 171, 255, 0.12), transparent 24%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.page {
  max-width: 1440px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.hero {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 28px;
}

.eyebrow {
  color: var(--pink);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 12px;
  margin: 0 0 8px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(28px, 4vw, 42px);
}

.subtitle {
  color: var(--muted);
  margin: 10px 0 0;
  max-width: 620px;
  line-height: 1.6;
}

.workspace {
  display: grid;
  grid-template-columns: 7fr 3fr;
  gap: 20px;
  align-items: start;
}

.results-column {
  display: grid;
  gap: 20px;
  min-width: 0;
}

.config-column {
  position: sticky;
  top: 20px;
}

.config-panel {
  padding: 20px;
}

.config-title {
  margin: 0 0 18px;
  font-size: 18px;
}

.empty-state h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

.empty-state p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.panel-head-stack {
  flex-direction: column;
  align-items: flex-start;
}

.panel-head-stack .meta {
  line-height: 1.6;
}

.panel {
  background: rgba(23, 26, 34, 0.92);
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.panel-head h2 {
  margin: 0;
  font-size: 18px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.field span {
  color: var(--muted);
  font-size: 14px;
}

.llm-panel {
  margin-top: 20px;
  margin-bottom: 0;
  border: 1px solid rgba(251, 114, 153, 0.22);
  border-radius: 14px;
  background: rgba(251, 114, 153, 0.05);
  padding: 0 14px 14px;
}

.llm-panel summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  cursor: pointer;
  padding: 14px 0 10px;
  font-weight: 600;
  list-style: none;
  user-select: none;
}

.llm-panel summary::-webkit-details-marker {
  display: none;
}

.llm-panel summary::before {
  content: "▸";
  flex-shrink: 0;
  margin-right: 8px;
  color: var(--pink);
  transition: transform 0.15s ease;
}

.llm-panel[open] summary::before {
  transform: rotate(90deg);
}

.llm-summary-label {
  flex: 1;
}

.llm-panel .hint {
  color: var(--muted);
  font-weight: 400;
  font-size: 12px;
  white-space: nowrap;
}

.llm-fields {
  display: grid;
  gap: 2px;
}

.field-hint {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.side-hint {
  margin: -8px 0 12px;
  color: var(--muted);
  font-size: 12px;
}

input,
select,
button {
  font: inherit;
}

input,
select {
  width: 100%;
  background: #10131a;
  color: var(--text);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 12px 14px;
}

input:focus,
select:focus {
  outline: 2px solid rgba(251, 114, 153, 0.35);
  border-color: var(--pink);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.checkbox-field {
  flex-direction: row;
  align-items: center;
  padding-top: 28px;
}

.checkbox-field input {
  width: auto;
  margin-right: 8px;
}

button[type="submit"] {
  width: 100%;
  border: none;
  border-radius: 12px;
  padding: 14px 18px;
  background: linear-gradient(135deg, var(--pink), var(--pink-dark));
  color: white;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

button[type="submit"]:hover:not(:disabled) {
  transform: translateY(-1px);
}

button[type="submit"]:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.ghost-btn {
  background: transparent;
  border: 1px solid var(--panel-border);
  color: var(--muted);
  border-radius: 999px;
  padding: 6px 12px;
  cursor: pointer;
}

.ghost-btn:hover {
  color: var(--text);
  border-color: var(--pink);
}

.trending-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.trending-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.trending-list li:last-child {
  border-bottom: none;
}

.rank {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.06);
  color: var(--muted);
  font-size: 13px;
}

.rank.top {
  background: rgba(251, 114, 153, 0.18);
  color: var(--pink);
}

.tag {
  margin-left: auto;
  font-size: 12px;
  color: var(--blue);
}

.trend-keyword {
  cursor: pointer;
}

.trend-keyword:hover {
  color: var(--pink);
}

.status {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
  color: var(--muted);
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.15);
  border-top-color: var(--pink);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.hidden {
  display: none !important;
}

.results {
  display: grid;
  gap: 20px;
}

.meta {
  color: var(--muted);
  font-size: 13px;
}

.report {
  line-height: 1.75;
}

.markdown-body h2 {
  margin-top: 28px;
  margin-bottom: 10px;
  font-size: 20px;
  color: var(--pink);
}

.markdown-body h2:first-child {
  margin-top: 0;
}

.markdown-body p,
.markdown-body li {
  color: #d7deea;
}

.markdown-body ul {
  padding-left: 20px;
}

.video-list {
  display: grid;
  gap: 12px;
}

.video-card {
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 14px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.02);
}

.video-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.video-card a {
  color: var(--blue);
  text-decoration: none;
}

.video-card a:hover {
  text-decoration: underline;
}

.video-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-size: 13px;
}

.muted {
  color: var(--muted);
}

.error {
  color: #ff8f98;
}

@media (max-width: 960px) {
  .hero {
    flex-direction: column;
  }

  .workspace {
    grid-template-columns: 1fr;
  }

  .config-column {
    position: static;
    order: -1;
  }
}