/* DayTrip AI News — dark theme, mobile-first */

:root {
  --bg-deep: #0c1222;
  --bg-card: #141c2f;
  --bg-card-hover: #1a2540;
  --bg-top: #162038;
  --border: rgba(100, 140, 220, 0.18);
  --text: #e8edf7;
  --text-muted: #94a3b8;
  --accent: #5b8def;
  --accent-soft: rgba(91, 141, 239, 0.15);
  --glow: rgba(91, 141, 239, 0.35);
  --success: #34d399;
  --warn: #fbbf24;
  --danger: #f87171;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-zh: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", var(--font-sans);
  --max-w: 900px;
  --transition: 0.22s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg-deep);
  background-image:
    radial-gradient(ellipse 120% 80% at 50% -30%, rgba(50, 80, 160, 0.35), transparent 55%),
    radial-gradient(ellipse 80% 50% at 100% 50%, rgba(40, 60, 120, 0.12), transparent 45%);
}

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

a:hover {
  color: #8eb4f8;
}

.site-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1rem 1.1rem 3rem;
}

/* Header & nav */
.site-header {
  padding: 1.25rem 0 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.75rem;
}

.brand {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1rem;
  margin-bottom: 1rem;
}

.brand-title {
  font-size: clamp(1.35rem, 4vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
  background: linear-gradient(135deg, #e8edf7 0%, #a8c4f0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-date {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.nav-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
}

.nav-pager {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 0.875rem;
  transition:
    background var(--transition),
    border-color var(--transition),
    transform var(--transition),
    box-shadow var(--transition);
}

.nav-btn:hover:not(.disabled) {
  background: var(--bg-card-hover);
  border-color: rgba(91, 141, 239, 0.4);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--glow);
}

.nav-btn.disabled {
  opacity: 0.35;
  pointer-events: none;
}

.date-select-wrap {
  flex: 1 1 100%;
  min-width: 0;
}

@media (min-width: 640px) {
  .date-select-wrap {
    flex: 0 1 auto;
    max-width: 220px;
    margin-left: auto;
  }
}

.date-select {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 0.875rem;
  font-family: inherit;
  cursor: pointer;
  transition:
    border-color var(--transition),
    box-shadow var(--transition);
}

.date-select:hover,
.date-select:focus {
  outline: none;
  border-color: rgba(91, 141, 239, 0.5);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* Section headers */
.section {
  margin-bottom: 2.25rem;
}

.section-title {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

/* Ranked list */
.ranked-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Category badges */
.category-badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.category-badge--youtube { background: rgba(239,68,68,0.2); color: #fca5a5; border: 1px solid rgba(239,68,68,0.3); }
.category-badge--substack { background: rgba(245,158,11,0.2); color: #fcd34d; border: 1px solid rgba(245,158,11,0.3); }
.category-badge--blog { background: rgba(59,130,246,0.2); color: #93c5fd; border: 1px solid rgba(59,130,246,0.3); }

/* Rank badge */
.rank-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(91,141,239,0.9);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

/* Article card */
.article-card {
  position: relative;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition:
    transform var(--transition),
    border-color var(--transition),
    box-shadow var(--transition),
    background var(--transition);
}

.article-card:hover {
  transform: translateY(-3px);
  border-color: rgba(91, 141, 239, 0.35);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(91, 141, 239, 0.08);
  background: var(--bg-card-hover);
}

.article-card--top {
  background: var(--bg-top);
  border-color: rgba(91, 141, 239, 0.28);
}

.article-card--top:hover {
  border-color: rgba(91, 141, 239, 0.45);
}

@media (min-width: 720px) {
  .article-card {
    flex-direction: row;
    align-items: stretch;
    min-height: 140px;
  }

  .article-card__media {
    flex: 0 0 200px;
    min-height: 140px;
  }

  .article-card--top .article-card__media {
    flex-basis: 240px;
    min-height: 160px;
  }
}

.article-card__media {
  position: relative;
  background: linear-gradient(145deg, #1e2a45, #121a2e);
  min-height: 160px;
}

.article-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.article-card__body {
  flex: 1;
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 0;
}

.article-card--top .article-card__body {
  padding: 1.15rem 1.2rem;
}

.article-card__title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 0.5rem 0.75rem;
}

.article-card__title {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.35;
  margin: 0;
  flex: 1 1 auto;
  min-width: 0;
}

.article-card--top .article-card__title {
  font-size: 1.15rem;
}

.article-card__link {
  color: var(--text);
  text-decoration: none;
  transition: color var(--transition);
}

.article-card__link:hover {
  color: var(--accent);
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
}

.source-badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--accent-soft);
  color: #b8cff9;
  border: 1px solid rgba(91, 141, 239, 0.25);
}

.importance {
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.importance-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.importance--1 .importance-dot,
.importance--2 .importance-dot {
  background: var(--text-muted);
  opacity: 0.6;
}

.importance--3 .importance-dot {
  background: var(--warn);
  box-shadow: 0 0 8px rgba(251, 191, 36, 0.45);
}

.importance--4 .importance-dot,
.importance--5 .importance-dot {
  background: var(--success);
  box-shadow: 0 0 8px rgba(52, 211, 153, 0.4);
}

.importance-stars {
  letter-spacing: 0.05em;
  color: var(--warn);
  font-size: 0.85rem;
}

.published {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.summary-block {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0;
}

.summary-block--en {
  font-style: italic;
}

.summary-block--zh {
  font-family: var(--font-zh);
  color: #c5d0e3;
}

.card-actions {
  margin-top: auto;
  padding-top: 0.35rem;
}

.read-original {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.read-original::after {
  content: "→";
  transition: transform var(--transition);
}

.read-original:hover::after {
  transform: translateX(4px);
}

.empty-hint {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: 0;
  padding: 1.5rem;
  text-align: center;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}

/* Footer */
.site-footer {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.site-footer strong {
  color: #b8c5dc;
  font-weight: 600;
}

/* XHS export page */
.xhs-page .site-header {
  margin-bottom: 1rem;
}

.xhs-intro {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0 0 1rem;
}

.xhs-textarea {
  width: 100%;
  min-height: 280px;
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-family: var(--font-zh);
  font-size: 0.95rem;
  line-height: 1.6;
  resize: vertical;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.xhs-textarea:focus {
  outline: none;
  border-color: rgba(91, 141, 239, 0.5);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.xhs-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.25rem;
  border: none;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #4a7ae8, #3564d4);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  box-shadow: 0 4px 16px var(--glow);
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    filter var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.06);
  box-shadow: 0 8px 24px rgba(91, 141, 239, 0.45);
}

.btn-primary:active {
  transform: translateY(0);
}

.xhs-char-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0.75rem 0 0;
}

/* Index redirect page (minimal) */
.redirect-msg {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

.redirect-msg a {
  font-weight: 600;
}

/* Article detail page */
.article-detail__hero {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1.25rem;
  max-height: 400px;
}

.article-detail__hero img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  max-height: 400px;
}

.article-detail__title {
  font-size: clamp(1.3rem, 4vw, 1.75rem);
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 0.75rem;
  background: linear-gradient(135deg, #e8edf7 0%, #a8c4f0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.article-detail__section {
  margin-top: 1.5rem;
  padding: 1.25rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
}

.article-detail__section-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}

.article-detail__body p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text);
  margin: 0 0 0.75rem;
}

.article-detail__body p:last-child {
  margin-bottom: 0;
}

.article-detail__body--zh {
  font-family: var(--font-zh);
}

.article-detail__body--zh p {
  color: #c5d0e3;
}

/* Weekly date badge */
.weekly-date-badge {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

/* Week selector */
.week-selector {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.week-selector label {
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.week-selector select {
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 0.875rem;
  font-family: inherit;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.week-selector select:hover,
.week-selector select:focus {
  outline: none;
  border-color: rgba(91, 141, 239, 0.5);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* Disabled nav button */
.nav-btn--disabled {
  opacity: 0.35;
  pointer-events: none;
  cursor: default;
}

/* Related articles */
.related-articles {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.related-articles__heading {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
}

.related-articles__list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.related-card {
  display: flex;
  align-items: stretch;
  gap: 0.85rem;
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  text-decoration: none;
  color: var(--text);
  transition:
    background var(--transition),
    border-color var(--transition),
    transform var(--transition);
}

.related-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(91, 141, 239, 0.35);
  transform: translateX(4px);
  color: var(--text);
}

.related-card__img {
  flex: 0 0 80px;
  height: 56px;
  border-radius: 6px;
  overflow: hidden;
  background: linear-gradient(145deg, #1e2a45, #121a2e);
}

.related-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.related-card__body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.3rem;
}

.related-card__title {
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.35;
  margin: 0;
  font-family: var(--font-zh);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card__meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}