/* 阿尔法叙事 — light daytime theme */
:root {
  --bg: #f4f6fb;
  --bg-elevated: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --border: rgba(15, 23, 42, 0.08);
  --border-strong: rgba(15, 23, 42, 0.14);
  --text: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;
  --accent: #3b5bdb;
  --accent-soft: rgba(59, 91, 219, 0.1);
  --accent-glow: rgba(59, 91, 219, 0.22);
  --success: #0f9f6e;
  --success-soft: rgba(15, 159, 110, 0.12);
  --warning: #c27803;
  --warning-soft: rgba(194, 120, 3, 0.12);
  --danger: #dc2626;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.04);
  --shadow-hover: 0 10px 28px rgba(15, 23, 42, 0.1), 0 2px 6px rgba(15, 23, 42, 0.05);
  --font: "Inter", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, monospace;
  --max: 1100px;
  color-scheme: light;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59, 91, 219, 0.12), transparent),
    radial-gradient(ellipse 55% 35% at 100% 0%, rgba(15, 159, 110, 0.06), transparent);
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  text-decoration: underline;
}

/* Layout */
.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(244, 246, 251, 0.82);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #3b5bdb, #0f9f6e);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 14px;
  color: #ffffff;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0;
  line-height: 1.25;
}

.brand-title {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.brand-sub {
  font-size: 0.72rem;
  color: var(--text-dim);
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid transparent;
}

.badge-sample {
  background: var(--warning-soft);
  color: var(--warning);
  border-color: rgba(194, 120, 3, 0.28);
}

.badge-count {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: rgba(59, 91, 219, 0.25);
}

/* Hero / intro */
.hero {
  padding: 2.25rem 0 1.5rem;
}

.hero h1 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.55rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.hero p {
  margin: 0;
  max-width: 42rem;
  color: var(--text-muted);
  font-size: 0.98rem;
}

.hero-note {
  margin-top: 0.85rem !important;
  font-size: 0.85rem !important;
  color: var(--text-dim) !important;
}

/* Toolbar */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.search-wrap {
  flex: 1 1 220px;
  position: relative;
}

.search-wrap svg {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-dim);
  pointer-events: none;
}

#searchInput {
  width: 100%;
  padding: 0.7rem 0.9rem 0.7rem 2.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: #f8fafc;
  color: var(--text);
  font: inherit;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}

#searchInput::placeholder {
  color: var(--text-dim);
}

#searchInput:focus {
  border-color: rgba(59, 91, 219, 0.45);
  box-shadow: 0 0 0 3px var(--accent-soft);
  background: #ffffff;
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}

.filter-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-right: 0.15rem;
}

.chip {
  appearance: none;
  border: 1px solid var(--border);
  background: #f8fafc;
  color: var(--text-muted);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.chip:hover {
  border-color: var(--border-strong);
  color: var(--text);
  background: #ffffff;
}

.chip.active {
  background: var(--accent-soft);
  border-color: rgba(59, 91, 219, 0.4);
  color: var(--accent);
}

.chip-risk.rumor.active {
  background: var(--warning-soft);
  border-color: rgba(194, 120, 3, 0.4);
  color: var(--warning);
}

.chip-risk.confirmed.active {
  background: var(--success-soft);
  border-color: rgba(15, 159, 110, 0.4);
  color: var(--success);
}

/* Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
  padding-bottom: 3rem;
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.25rem;
  box-shadow: var(--shadow);
  transition: border-color 0.2s, transform 0.2s, background 0.2s, box-shadow 0.2s;
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.55rem;
}

.card-name {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.card-tagline {
  margin: 0 0 0.75rem;
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 500;
}

.risk-tag {
  flex-shrink: 0;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.22rem 0.55rem;
  border-radius: 6px;
  letter-spacing: 0.02em;
}

.risk-tag.rumor {
  background: var(--warning-soft);
  color: var(--warning);
}

.risk-tag.confirmed {
  background: var(--success-soft);
  color: var(--success);
}

.card-summary {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 0.88rem;
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.tag {
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  background: #f1f5f9;
  color: var(--text-dim);
  border: 1px solid var(--border);
}

.card-footer {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.card-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.9rem;
  font-size: 0.82rem;
}

.card-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-weight: 500;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

.card-meta .narrative-pill {
  color: var(--text-muted);
  background: #f1f5f9;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  border: 1px solid var(--border);
}

/* Empty / loading / error */
.state-box {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-muted);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  box-shadow: var(--shadow);
}

.state-box.error {
  color: var(--danger);
  border-color: rgba(220, 38, 38, 0.35);
  background: rgba(220, 38, 38, 0.04);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0 2rem;
  color: var(--text-dim);
  font-size: 0.8rem;
  text-align: center;
}

.site-footer code {
  font-family: var(--mono);
  font-size: 0.78rem;
  background: #e8eef7;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  color: var(--text-muted);
}

/* Hidden utility */
.hidden {
  display: none !important;
}

@media (max-width: 560px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .toolbar {
    padding: 0.85rem;
  }

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

.chip-risk.medium.active {
  background: var(--accent-soft);
  border-color: rgba(59, 91, 219, 0.4);
  color: var(--accent);
}

.risk-tag.medium {
  background: var(--accent-soft);
  color: var(--accent);
}

.card-why {
  margin: 0 0 0.65rem;
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  border: 1px solid rgba(59, 91, 219, 0.18);
  color: var(--text-muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.card-why-label {
  display: inline-block;
  margin-right: 0.45rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent);
  text-transform: none;
}

.card-caveat {
  margin: 0 0 0.85rem;
  font-size: 0.78rem;
  color: var(--warning);
  line-height: 1.45;
}

.hero-disclaimer {
  margin-top: 0.75rem !important;
  max-width: 48rem;
  font-size: 0.8rem !important;
  color: var(--text-dim) !important;
  line-height: 1.5;
}