/* ── Reset ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Design tokens ──────────────────────────────── */
:root {
  --bg:           #07070d;
  --bg-card:      #0e0e18;
  --bg-card-h:    #141426;
  --border:       rgba(255,255,255,.07);
  --border-h:     rgba(245,166,35,.3);
  --gold:         #f5a623;
  --gold-dim:     rgba(245,166,35,.15);
  --gold-glow:    rgba(245,166,35,.35);
  --text:         #e8e4dc;
  --text-dim:     rgba(232,228,220,.5);
  --text-faint:   rgba(232,228,220,.25);
  --red:          #e05252;
  --radius:       14px;
  --radius-sm:    8px;
  --transition:   .25s cubic-bezier(.4,0,.2,1);
}

/* ── Base ───────────────────────────────────────── */
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Grain overlay ──────────────────────────────── */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  opacity: .025;
  pointer-events: none;
}

/* ── Hero background ────────────────────────────── */
.hero-bg {
  position: fixed; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, rgba(245,166,35,.06) 0%, transparent 70%),
    radial-gradient(ellipse 40% 30% at 80% 80%, rgba(100,60,200,.05) 0%, transparent 60%);
}

/* ── Layout ─────────────────────────────────────── */
.page {
  position: relative; z-index: 1;
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px;
  box-sizing: border-box;
  overflow-x: hidden;
}

/* ── Header ─────────────────────────────────────── */
header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 28px 0 0;
}

.logo-mark {
  width: 34px; height: 34px;
  border: 1.5px solid var(--gold);
  border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.logo-mark svg { width: 18px; height: 18px; }

.logo-text {
  font-family: 'Cinzel', serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--gold);
  text-transform: uppercase;
}

.header-dot {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--border) 0%, transparent 100%);
  margin-left: 12px;
}

.health-badge {
  display: flex; align-items: center; gap: 6px;
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: .05em;
}

.health-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #3f3f3f;
  transition: background .4s;
}

.health-dot.ok  { background: #3fc97a; box-shadow: 0 0 6px rgba(63,201,122,.6); }
.health-dot.err { background: var(--red); }

/* ── Hero ───────────────────────────────────────── */
.hero {
  padding: 80px 0 52px;
  text-align: center;
}

.hero-eyebrow {
  font-size: 11px;
  letter-spacing: .35em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 22px;
  opacity: .8;
}

.hero-title {
  font-family: 'Cinzel', serif;
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: .01em;
  color: var(--text);
  margin-bottom: 14px;
}

.hero-title span {
  color: var(--gold);
  position: relative;
  display: inline-block;
}

.hero-title span::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: var(--gold);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  animation: lineReveal .8s .6s cubic-bezier(.4,0,.2,1) forwards;
}

@keyframes lineReveal {
  to { transform: scaleX(1); }
}

.hero-sub {
  font-size: 15px;
  color: var(--text-dim);
  max-width: 420px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ── Search bar ─────────────────────────────────── */
.search-wrap {
  margin: 42px auto 0;
  max-width: 640px;
  position: relative;
}

.search-bar {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 50px;
  padding: 6px 8px 6px 22px;
  gap: 12px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-bar:focus-within {
  border-color: var(--gold);
  box-shadow: 0 0 0 4px var(--gold-dim), 0 20px 60px rgba(0,0,0,.4);
}

.search-icon {
  flex-shrink: 0;
  color: var(--text-faint);
  transition: color var(--transition);
}

.search-bar:focus-within .search-icon { color: var(--gold); }

.search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: 'DM Sans', sans-serif;
  font-size: 16px;
  font-weight: 300;
  color: var(--text);
  caret-color: var(--gold);
}

.search-input::placeholder { color: var(--text-faint); }

.search-btn {
  flex-shrink: 0;
  background: var(--gold);
  border: none;
  border-radius: 40px;
  padding: 11px 22px;
  cursor: pointer;
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .04em;
  color: #1a0f00;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex; align-items: center; gap: 7px;
}

.search-btn:hover {
  background: #ffc04d;
  transform: translateY(-1px);
  box-shadow: 0 6px 24px var(--gold-glow);
}

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

.search-btn svg { width: 14px; height: 14px; }

/* Loading spinner in button */
.spinner {
  width: 14px; height: 14px;
  border: 2px solid rgba(26,15,0,.3);
  border-top-color: #1a0f00;
  border-radius: 50%;
  animation: spin .7s linear infinite;
  display: none;
}

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

/* ── Suggestions chips ──────────────────────────── */
.suggestions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 18px;
}

.chip {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 12px;
  color: var(--text-dim);
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: .02em;
}

.chip:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: var(--gold-dim);
}

/* ── Status / error ─────────────────────────────── */
.status-bar {
  max-width: 640px;
  margin: 14px auto 0;
  font-size: 12px;
  text-align: left;
  min-height: 18px;
  color: var(--text-faint);
  display: flex; align-items: center; gap: 8px;
  padding: 0 10px;
  transition: opacity .3s;
}

.status-bar.error { color: var(--red); }

/* ── Divider ────────────────────────────────────── */
.divider {
  display: flex; align-items: center; gap: 16px;
  margin: 52px 0 32px;
  opacity: 0;
  transition: opacity .4s;
}

.divider.visible { opacity: 1; }

.divider-line { flex: 1; height: 1px; background: var(--border); }

.divider-label {
  font-size: 11px;
  letter-spacing: .25em;
  text-transform: uppercase;
  color: var(--text-faint);
  white-space: nowrap;
}

/* ── Results grid ───────────────────────────────── */
.results {
  display: grid;
  gap: 14px;
  margin-bottom: 80px;
}

/* ── Card ───────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  cursor: default;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
  animation: cardIn .35s cubic-bezier(.4,0,.2,1) both;
}

.card:nth-child(1) { animation-delay: .05s; }
.card:nth-child(2) { animation-delay: .10s; }
.card:nth-child(3) { animation-delay: .15s; }
.card:nth-child(4) { animation-delay: .20s; }
.card:nth-child(5) { animation-delay: .25s; }
.card:nth-child(6) { animation-delay: .30s; }
.card:nth-child(7) { animation-delay: .35s; }
.card:nth-child(8) { animation-delay: .40s; }
.card:nth-child(9) { animation-delay: .45s; }
.card:nth-child(10){ animation-delay: .50s; }

@keyframes cardIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

.card-left { min-width: 0; }

.card-rank {
  font-size: 11px;
  color: var(--gold);
  letter-spacing: .15em;
  text-transform: uppercase;
  margin-bottom: 6px;
  font-weight: 500;
}

.card-title {
  font-family: 'Cinzel', serif;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-body {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.tag {
  padding: 3px 10px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: .04em;
}

.card-score-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  flex-shrink: 0;
}

.card-score {
  font-family: 'Cinzel', serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
  white-space: nowrap;
}

.card-score small {
  font-family: 'DM Sans', sans-serif;
  font-size: 10px;
  font-weight: 300;
  color: var(--text-faint);
  letter-spacing: .08em;
  margin-left: 2px;
}

.card-eps {
  font-size: 11px;
  color: var(--text-faint);
  text-align: right;
  white-space: nowrap;
}

.card-rel {
  font-size: 10px;
  color: var(--text-faint);
  text-align: right;
  padding: 3px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  letter-spacing: .04em;
  white-space: nowrap;
}

/* ── Skeleton loader ────────────────────────────── */
.skeleton {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  animation: shimmer 1.6s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { opacity: .5; }
  50%       { opacity: 1; }
}

.skeleton-line {
  height: 12px;
  border-radius: 6px;
  background: rgba(255,255,255,.06);
  margin-bottom: 10px;
}

/* ── Empty state ────────────────────────────────── */
.empty {
  text-align: center;
  padding: 60px 0;
  color: var(--text-faint);
  font-size: 14px;
  grid-column: 1 / -1;
}

.empty svg { width: 40px; height: 40px; margin: 0 auto 16px; display: block; opacity: .3; }

/* ── Scroll to top ──────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 42px; height: 42px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: translateY(12px);
  transition: all var(--transition);
  z-index: 10;
  color: var(--text-dim);
}

.back-to-top.show {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover { border-color: var(--gold); color: var(--gold); }

/* ── Footer ─────────────────────────────────────── */
footer {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: 60px;
  background: linear-gradient(to top, var(--bg) 60%, transparent);
  pointer-events: none;
  z-index: 5;
}

/* ── Responsive ─────────────────────────────────── */
@media (max-width: 600px) {
  .hero { padding: 60px 0 40px; }
  .card { grid-template-columns: 1fr; }
  .card-score-wrap { flex-direction: row; align-items: center; }
}
/* ── Center fix ──────────────────────────────────── */
/* overflow-x hidden on .page prevents child overflow from shifting layout */

/* Fix card-title bị overflow làm lệch layout */
.card-title {
  font-family: 'Cinzel', serif;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

/* Fix card grid không tràn ra ngoài */
.card {
  min-width: 0;
  overflow: hidden;
}

.card-left {
  min-width: 0;
  overflow: hidden;
}

/* ── Result message ──────────────────────────────── */
.result-message {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.65;
  padding: 14px 18px;
  background: rgba(245,166,35,.05);
  border: 1px solid rgba(245,166,35,.12);
  border-radius: var(--radius);
  margin-bottom: 6px;
}

/* ── Rewritten query hint ────────────────────────── */
.rewrite-hint {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 12px;
  color: var(--text-faint);
  margin-bottom: 18px;
  padding: 0 4px;
}
.rewrite-label {
  color: var(--gold);
  opacity: .6;
  font-weight: 500;
  flex-shrink: 0;
}
.rewrite-text {
  font-style: italic;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: normal;
  word-break: break-word;
}

/* ── Why reason ──────────────────────────────────── */
.card-why {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 4px;
}

/* ── MAL link ────────────────────────────────────── */
.card-link {
  font-size: 11px;
  color: var(--gold);
  text-decoration: none;
  opacity: .7;
  letter-spacing: .05em;
  transition: opacity var(--transition);
  white-space: nowrap;
}
.card-link:hover { opacity: 1; }

/* ── Top K control ──────────────────────────────── */
.topk-control {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 18px;
  padding: 10px 16px;
  border-radius: 12px;
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border);
  transition: border-color var(--transition);
}

.topk-control:hover {
  border-color: rgba(245,166,35,.2);
}

.topk-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: .04em;
  white-space: nowrap;
  cursor: default;
}

.topk-label svg {
  color: var(--gold);
  opacity: .6;
}

.topk-slider-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  max-width: 260px;
}

.topk-range {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  transition: background var(--transition);
}

.topk-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--gold);
  border: 2px solid var(--bg);
  box-shadow: 0 0 8px var(--gold-glow);
  cursor: grab;
  transition: transform var(--transition), box-shadow var(--transition);
}

.topk-range::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 14px var(--gold-glow);
}

.topk-range::-webkit-slider-thumb:active {
  cursor: grabbing;
  transform: scale(1.1);
}

.topk-range::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--gold);
  border: 2px solid var(--bg);
  box-shadow: 0 0 8px var(--gold-glow);
  cursor: grab;
}

.topk-value {
  font-family: 'Cinzel', serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--gold);
  min-width: 28px;
  text-align: center;
}

/* ── Load More button ───────────────────────────── */
.load-more-wrap {
  display: flex;
  justify-content: center;
  padding: 8px 0 80px;
}

.load-more-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  background: transparent;
  border: 1.5px solid var(--border);
  border-radius: 50px;
  color: var(--text-dim);
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: .04em;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.load-more-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--gold-dim) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
}

.load-more-btn:hover {
  border-color: var(--gold);
  color: var(--gold);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(245,166,35,.12);
}

.load-more-btn:hover::before {
  opacity: 1;
}

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

.load-more-btn:disabled {
  cursor: not-allowed;
  opacity: .5;
  transform: none;
}

.load-more-btn svg {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}

.load-more-btn span {
  position: relative;
  z-index: 1;
}

.load-more-spinner {
  display: none;
  position: relative;
  z-index: 1;
  border-color: rgba(232,228,220,.2);
  border-top-color: var(--gold);
}

/* ── Page separator (between Load More batches) ── */
.load-more-separator {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 24px 0 12px;
  animation: cardIn .35s cubic-bezier(.4,0,.2,1) both;
}

.separator-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--gold-dim), transparent);
}

.separator-label {
  font-size: 10px;
  letter-spacing: .25em;
  text-transform: uppercase;
  color: var(--gold);
  opacity: .5;
  white-space: nowrap;
  padding: 4px 12px;
  border: 1px solid var(--gold-dim);
  border-radius: 20px;
}