:root {
  --bg: #0A0A0A;
  --bg-2: #111111;
  --bg-3: #18181A;
  --fg: #F4F4F0;
  --fg-dim: rgba(244, 244, 240, 0.58);
  --fg-faint: rgba(244, 244, 240, 0.28);
  --line: rgba(244, 244, 240, 0.12);
  --line-2: rgba(244, 244, 240, 0.22);
  --accent: #D4FF3A;          /* electric yellow-green */
  --accent-2: #B9FF00;
  --accent-dim: rgba(212, 255, 58, 0.35);
  --danger: #FF4D3A;

  --display: 'Archivo Black', 'Anton', 'Inter', system-ui, sans-serif;
  --body: 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html {
  scroll-snap-type: y mandatory;
  scroll-behavior: smooth;
}
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ================== HERO ================== */
.hero {
  position: relative;
  height: 100vh;
  padding: 48px 64px 0;
  overflow: hidden;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  background: radial-gradient(ellipse at 70% 30%, rgba(212, 255, 58, 0.06) 0%, transparent 55%), var(--bg);
}

.hero-lanes {
  position: absolute;
  inset: 140px 0 200px 0;
  opacity: 0.12;
  pointer-events: none;
}
.hero-lane {
  position: absolute;
  left: 0; right: 0;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--fg) 0 12px, transparent 12px 20px);
}

.hero-startline {
  position: absolute;
  right: 64px;
  top: 140px;
  bottom: 200px;
  width: 24px;
  background: repeating-linear-gradient(0deg, var(--fg) 0 14px, transparent 14px 28px);
  opacity: 0.22;
}
.hero-startline-label {
  position: absolute;
  right: 0; bottom: -28px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--fg-dim);
  transform: rotate(-90deg);
  transform-origin: right top;
  white-space: nowrap;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1600px;
  margin: 0 auto;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--fg-dim);
  margin-bottom: 56px;
}
.hero-meta-dot {
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent);
  animation: pulse 1.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.85); }
}
.hero-meta-divider {
  width: 28px; height: 1px;
  background: var(--fg-faint);
}
.hero-meta-bib {
  color: var(--fg);
}

.hero-title {
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(64px, 11vw, 180px);
  line-height: 0.86;
  letter-spacing: -0.03em;
  margin: 0 0 64px;
  text-transform: uppercase;
}
.hero-title-row {
  display: flex;
  align-items: baseline;
  gap: 24px;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.9s cubic-bezier(.2,.8,.2,1), transform 0.9s cubic-bezier(.2,.8,.2,1);
}
.hero-title-row--right {
  justify-content: flex-end;
  padding-right: 12vw;
  transition-delay: 0.1s;
}
.hero-title--in .hero-title-row {
  opacity: 1;
  transform: translateY(0);
}
.hero-title-word {
  color: var(--fg);
  font-family: 'Pretendard', 'Apple SD Gothic Neo', var(--display);
  font-weight: 900;
  font-style: italic;
}
.hero-title-word--accent { color: var(--accent); }
.hero-title-stroke {
  color: transparent;
  -webkit-text-stroke: 2px var(--fg);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 48px;
}
.hero-stat {
  background: var(--bg);
  padding: 22px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.hero-stat-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--fg-dim);
}
.hero-stat-value {
  font-family: var(--display);
  font-size: 52px;
  font-weight: 900;
  line-height: 0.9;
  letter-spacing: -0.03em;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.hero-stat-value--mono {
  font-family: var(--mono);
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.hero-stat-unit {
  font-size: 18px;
  font-weight: 700;
  color: var(--fg-dim);
}
.hero-stat-divider {
  font-family: var(--display);
  color: var(--accent);
  font-size: 32px;
}
.hero-stat-sub {
  font-size: 13px;
  color: var(--fg-dim);
  margin-top: auto;
}
.hero-stat-num {
  color: var(--fg);
}

.hero-scroll-hint {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--fg-dim);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  margin-bottom: 48px;
}
.hero-scroll-arrow {
  animation: bob 1.4s ease-in-out infinite;
  color: var(--accent);
}
@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* marquee */
.hero-marquee {
  position: absolute;
  bottom: 0;
  left: 0; right: 0;
  height: 88px;
  overflow: hidden;
  border-top: 1px solid var(--line);
  background: var(--accent);
  color: var(--bg);
  display: flex;
  align-items: center;
}
.hero-marquee-track {
  display: flex;
  gap: 0;
  white-space: nowrap;
  font-family: var(--display);
  font-size: 52px;
  font-weight: 900;
  letter-spacing: -0.02em;
  animation: marquee 20s linear infinite;
}
.hero-marquee-item {
  padding: 0 12px;
}
@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ================== TIMELINE SECTION ================== */
.timeline-section {
  background: var(--bg);
  padding: 32px 0 16px;
  position: relative;
  border-top: 1px solid var(--line);
  height: 100vh;
  display: flex;
  flex-direction: column;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  overflow: hidden;
}

.timeline-head {
  max-width: 1600px;
  margin: 0 auto 20px;
  padding: 0 64px;
  width: 100%;
  flex-shrink: 0;
}
.timeline-head-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  margin-bottom: 40px;
}
.timeline-head-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--accent);
  margin-bottom: 20px;
}
.timeline-head-title {
  font-family: 'Pretendard', 'Apple SD Gothic Neo', var(--display);
  font-weight: 900;
  font-size: clamp(40px, 5vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  margin: 0;
  max-width: 12ch;
}
.timeline-head-title .accent { color: var(--accent); }

.timeline-head-meta {
  display: flex;
  gap: 56px;
  padding-bottom: 8px;
}
.timeline-head-meta-item .tm-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--fg-dim);
  margin-bottom: 6px;
}
.timeline-head-meta-item .tm-val {
  font-family: var(--display);
  font-size: 24px;
  font-weight: 900;
  letter-spacing: -0.01em;
}
.tm-val-mono { font-family: var(--mono); font-weight: 700; color: var(--accent); }

/* filters */
.filters {
  display: flex;
  gap: 40px;
  align-items: center;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
.filters-group {
  display: flex;
  align-items: center;
  gap: 16px;
}
.filters-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--fg-dim);
}
.filters-pills {
  display: flex;
  gap: 6px;
}
.filter-pill {
  background: transparent;
  border: 1px solid var(--line-2);
  color: var(--fg-dim);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 7px 14px;
  cursor: pointer;
  transition: all 0.15s;
}
.filter-pill:hover { color: var(--fg); border-color: var(--fg-faint); }
.filter-pill--active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}

/* timeline scroll wrapper */
.timeline-wrap {
  position: relative;
  padding: 0 64px;
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.timeline-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--bg-3);
  border: 1px solid var(--line-2);
  color: var(--fg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}
.timeline-arrow:hover {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.timeline-arrow--left { left: 16px; }
.timeline-arrow--right { right: 16px; }

.timeline-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--line-2) transparent;
  padding: 0;
  flex: 1;
  min-height: 0;
}
.timeline-scroll::-webkit-scrollbar { height: 8px; }
.timeline-scroll::-webkit-scrollbar-track { background: var(--bg-2); }
.timeline-scroll::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 4px; }
.timeline-scroll::-webkit-scrollbar-thumb:hover { background: var(--accent-dim); }

.timeline-track {
  position: relative;
  height: 100%;
}

/* Track surface - 8 lanes */
.track-surface {
  position: absolute;
  top: 230px;
  left: 0; right: 0;
  height: 200px;
  background: linear-gradient(180deg, rgba(212, 255, 58, 0.02), rgba(212, 255, 58, 0.01));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.track-lane-line {
  position: absolute;
  left: 0; right: 0;
  height: 1px;
  background-image: repeating-linear-gradient(90deg, var(--fg-faint) 0 18px, transparent 18px 30px);
}
.track-lane-line--edge {
  background: var(--fg-faint);
}
.track-lane-num {
  position: absolute;
  left: 18px;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  color: var(--fg-faint);
  pointer-events: none;
}

.track-startline {
  position: absolute;
  top: 230px;
  left: 90px;
  width: 20px;
  height: 200px;
  z-index: 3;
}
.track-startline-bars {
  height: 100%;
  display: grid;
  grid-template-rows: repeat(32, 1fr);
}
.track-startline-bars span:nth-child(odd) { background: var(--fg); }
.track-startline-bars span:nth-child(even) { background: transparent; }
.track-startline-label {
  position: absolute;
  top: -22px;
  left: 0;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--fg-dim);
  white-space: nowrap;
}

.track-finishline {
  position: absolute;
  top: 230px;
  right: 90px;
  width: 20px;
  height: 200px;
  z-index: 3;
}
.track-finishline-bars {
  height: 100%;
  display: grid;
  grid-template-rows: repeat(32, 1fr);
}
.track-finishline-bars span:nth-child(odd) { background: var(--accent); }
.track-finishline-bars span:nth-child(even) { background: transparent; }
.track-finishline-label {
  position: absolute;
  top: -22px;
  right: 0;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--accent);
  white-space: nowrap;
}

/* Pace line SVG */
.pace-line-svg {
  position: absolute;
  top: 230px;
  left: 0;
  width: 100%;
  pointer-events: none;
  z-index: 4;
}
.pace-line-path {
  transition: stroke-dashoffset 0.12s linear;
}

/* km markers */
.track-km-markers {
  position: absolute;
  top: 430px;
  left: 0; right: 0;
  height: 28px;
}
.km-marker {
  position: absolute;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.km-marker-tick {
  width: 1px;
  height: 12px;
  background: var(--fg-faint);
}
.km-marker-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--fg-dim);
}

/* race cards along track */
.track-cards { position: relative; height: 100%; z-index: 5; }
.track-card-slot {
  position: absolute;
  width: 300px;
  z-index: 5;
}
.track-connector {
  position: absolute;
  left: 50%;
  width: 1px;
  background: var(--line-2);
}
.track-connector--top {
  top: 100%;
  height: 50px;
}
.track-connector--bot {
  bottom: 100%;
  height: 50px;
}
.track-connector::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 7px; height: 7px;
  background: var(--accent);
  border-radius: 50%;
}
.track-connector--top::before { top: -3px; }
.track-connector--bot::before { bottom: -3px; }

/* ================== RACE CARD ================== */
.race-card {
  position: relative;
  width: 300px;
  z-index: 6;
  transition: transform 0.3s cubic-bezier(.2,.8,.2,1);
}
.race-card-face {
  width: 100%;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 16px 18px;
  text-align: left;
  cursor: pointer;
  color: var(--fg);
  font-family: var(--body);
  transition: all 0.2s;
  position: relative;
  display: block;
  z-index: 6;
}
.race-card-face:hover {
  border-color: var(--accent);
  background: var(--bg-3);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.5), 0 0 0 1px var(--accent);
}
.race-card--expanded .race-card-face {
  border-color: var(--accent);
  background: var(--bg-3);
}

.race-card-date {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 14px;
  font-family: var(--mono);
}
.race-card-day {
  font-family: var(--display);
  font-size: 38px;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--accent);
  line-height: 1;
}
.race-card-month {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--fg);
  font-weight: 700;
}
.race-card-year {
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--fg-dim);
  margin-left: auto;
}

.race-card-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.18em;
  padding: 3px 8px;
  border: 1px solid var(--accent);
  color: var(--accent);
  margin-bottom: 8px;
}
.race-card-tag--full {
  background: var(--accent);
  color: var(--bg);
}
.race-card-tag--10k {
  border-color: var(--fg-faint);
  color: var(--fg-dim);
}

.race-card-name {
  font-family: 'Pretendard', 'Apple SD Gothic Neo', var(--display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 5px;
}
.race-card-loc {
  font-size: 11px;
  color: var(--fg-dim);
  margin-bottom: 14px;
}

.race-card-time {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 10px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
}
.race-card-time-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--fg-dim);
}
.race-card-time-val {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--fg);
  font-variant-numeric: tabular-nums;
}

.race-card-pace-row {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--fg-dim);
  margin-top: 6px;
}
.race-card-expand-hint { color: var(--accent); }

/* Station dot on the track */
.race-station {
  position: absolute;
  left: 180px;
  top: 50%;
  z-index: 5;
  pointer-events: none;
  display: none; /* hidden; connector dot serves this role */
}

/* Year marker */
.race-year-marker {
  position: absolute;
  top: -22px;
  left: 0;
  font-family: var(--display);
  font-size: 24px;
  font-weight: 900;
  color: transparent;
  -webkit-text-stroke: 1px var(--accent);
  letter-spacing: -0.03em;
  pointer-events: none;
  line-height: 1;
}

/* ================== RACE DETAIL (expanded) ================== */
.race-detail-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.78);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  overflow-y: auto;
  animation: overlayIn 0.2s ease-out;
}
@keyframes overlayIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.race-detail {
  position: relative;
  width: 1100px;
  max-width: 100%;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
  background: var(--bg-2);
  border: 1px solid var(--accent);
  box-shadow: 0 30px 80px rgba(0,0,0,0.7), 0 0 0 1px var(--accent-dim), 0 0 60px rgba(212, 255, 58, 0.15);
  padding: 40px;
  animation: detailIn 0.35s cubic-bezier(.2,.8,.2,1);
}
@keyframes detailIn {
  from { opacity: 0; transform: translateY(-12px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.race-detail-close {
  position: absolute;
  top: 20px; right: 24px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--fg-dim);
  cursor: pointer;
  padding: 6px 10px;
  border: 1px solid var(--line-2);
}
.race-detail-close:hover { color: var(--accent); border-color: var(--accent); }

.race-detail-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 40px;
}
.race-detail-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--fg-dim);
  margin-bottom: 10px;
}
.race-detail-cert { }

.race-detail-header { margin-bottom: 24px; }
.race-detail-title {
  font-family: 'Pretendard', var(--display);
  font-size: 34px;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 6px 0;
}
.race-detail-subtitle {
  font-size: 13px;
  color: var(--fg-dim);
  font-family: var(--mono);
  letter-spacing: 0.04em;
}

.race-detail-hero-time {
  background: var(--bg);
  padding: 20px 24px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  margin-bottom: 24px;
}
.race-detail-hero-time-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--fg-dim);
  margin-bottom: 6px;
}
.race-detail-hero-time-val {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 64px;
  letter-spacing: -0.02em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 2px;
}
.race-detail-hero-time-val .sep { opacity: 0.5; }

.race-detail-kpis {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-bottom: 24px;
}
.race-detail-kpi {
  background: var(--bg-2);
  padding: 14px 16px;
}
.kpi-label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  color: var(--fg-dim);
  margin-bottom: 6px;
}
.kpi-val {
  font-family: var(--body);
  font-size: 15px;
  font-weight: 700;
}
.kpi-unit { color: var(--fg-dim); font-weight: 500; }

.race-detail-note {
  padding: 16px 18px;
  background: var(--bg);
  border: 1px solid var(--line);
  margin-bottom: 24px;
}
.race-detail-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--fg);
}

.race-detail-photos-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.race-photo {
  aspect-ratio: 1;
  position: relative;
  cursor: zoom-in;
  transition: transform 0.2s;
}
.race-photo:hover { transform: scale(1.02); }
.race-photo-inner {
  position: absolute;
  inset: 0;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 10px;
}
.race-photo-stripes {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(135deg, rgba(255,255,255,0.02) 0 8px, rgba(255,255,255,0.04) 8px 16px);
}
.race-photo-label {
  position: relative;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--fg);
  background: rgba(0,0,0,0.7);
  padding: 4px 6px;
}

/* ================== CERTIFICATE ================== */
.cert {
  position: relative;
  width: 100%;
  aspect-ratio: 7 / 10;
  perspective: 1000px;
  cursor: pointer;
}
.cert-paper {
  position: relative;
  width: 100%;
  height: 100%;
  background: linear-gradient(165deg, #F4F0E4 0%, #E8E2D0 100%);
  transform: rotate(-1.5deg);
  transition: transform 0.4s cubic-bezier(.2,.8,.2,1), box-shadow 0.4s;
  box-shadow:
    0 4px 20px rgba(0,0,0,0.4),
    inset 0 0 0 1px rgba(0,0,0,0.1);
  color: #161615;
}
.cert--hover .cert-paper {
  transform: rotate(0deg) scale(1.04);
  box-shadow:
    0 24px 60px rgba(0,0,0,0.5),
    0 0 0 2px var(--accent),
    0 0 40px rgba(212, 255, 58, 0.4),
    inset 0 0 0 1px rgba(0,0,0,0.08);
}
.cert-bg {
  position: absolute; inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(0,0,0,0.025) 0 2px, transparent 2px 6px),
    radial-gradient(circle at 50% 50%, transparent 40%, rgba(0,0,0,0.06) 100%);
}
.cert-inner {
  position: absolute;
  inset: 14px;
  border: 1px solid rgba(0,0,0,0.18);
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.cert-inner::before {
  content: '';
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(0,0,0,0.12);
  pointer-events: none;
}

.cert-topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(0,0,0,0.15);
  margin-bottom: 18px;
}
.cert-seal {
  color: #161615;
  flex-shrink: 0;
}
.cert-topbar-meta { flex: 1; }
.cert-topbar-small {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.22em;
  color: rgba(0,0,0,0.6);
}
.cert-topbar-bib {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.15em;
  margin-top: 3px;
}
.cert-name {
  font-family: 'Pretendard', var(--display);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 3px;
}
.cert-name-en {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: rgba(0,0,0,0.6);
  margin-bottom: 18px;
  text-transform: uppercase;
}
.cert-distance-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.cert-dist-tag {
  background: #161615;
  color: #F4F0E4;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.18em;
  padding: 4px 8px;
}
.cert-dist-km {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
}
.cert-time-block {
  background: #161615;
  color: #F4F0E4;
  padding: 12px 14px;
  margin: 0 -4px 16px;
  border-left: 3px solid var(--accent);
}
.cert-time-label {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.22em;
  color: rgba(244,240,228,0.65);
  margin-bottom: 4px;
}
.cert-time-value {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 32px;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  display: flex;
  align-items: baseline;
}
.cert-time-sep { opacity: 0.5; margin: 0 2px; }

.cert-bottom {
  display: flex;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px dashed rgba(0,0,0,0.25);
  margin-top: auto;
}
.cert-bottom-col {
  flex: 1;
  min-width: 0;
}
.cert-bottom-label {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.22em;
  color: rgba(0,0,0,0.55);
  margin-bottom: 3px;
}
.cert-bottom-value {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cert-watermark {
  position: absolute;
  right: -10px; bottom: 50px;
  font-family: var(--display);
  font-size: 72px;
  font-weight: 900;
  color: rgba(0,0,0,0.05);
  line-height: 0.8;
  letter-spacing: -0.04em;
  text-align: right;
  pointer-events: none;
}
.cert-perforations {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  display: flex;
  justify-content: space-around;
}
.cert-perforations span {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--bg-2);
  transform: translateY(-3px);
}
.cert-replace-hint {
  position: absolute;
  left: 0; right: 0; bottom: -24px;
  text-align: center;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  color: var(--fg-faint);
}

/* ================== TIMELINE PROGRESS BAR ================== */
.timeline-progress {
  position: relative;
  margin: 16px 0 0;
  height: 4px;
  background: var(--line);
}
.timeline-progress-bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--accent);
  transition: width 0.08s linear;
  box-shadow: 0 0 10px var(--accent);
}
.timeline-progress-markers {
  position: absolute;
  top: 50%;
  left: 0; right: 0;
  height: 1px;
}
.timeline-progress-marker {
  position: absolute;
  width: 8px; height: 8px;
  transform: translate(-50%, -50%);
  background: var(--bg);
  border: 1px solid var(--fg-faint);
  border-radius: 50%;
}

/* ================== TWEAKS PANEL ================== */
.tweaks-panel {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 280px;
  background: var(--bg-2);
  border: 1px solid var(--accent);
  padding: 18px;
  z-index: 100;
  font-family: var(--body);
  box-shadow: 0 10px 40px rgba(0,0,0,0.6);
}
.tweaks-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.tweaks-title {
  font-family: var(--display);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--accent);
}
.tweaks-close {
  cursor: pointer;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-dim);
  background: none;
  border: none;
  padding: 0;
}
.tweak-row {
  margin-bottom: 14px;
}
.tweak-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--fg-dim);
  margin-bottom: 6px;
}
.tweak-options {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.tweak-opt {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 1px solid var(--line-2);
  color: var(--fg-dim);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 6px 10px;
  cursor: pointer;
  text-align: center;
  transition: all 0.15s;
}
.tweak-opt:hover { color: var(--fg); }
.tweak-opt--active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
  font-weight: 700;
}
.tweak-swatches {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.tweak-swatch {
  width: 32px; height: 32px;
  border: 2px solid transparent;
  cursor: pointer;
  padding: 0;
  background: var(--color);
}
.tweak-swatch--active { border-color: var(--fg); }

.tweak-theme {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
}
.tweak-theme-chip {
  position: relative;
  width: 38px; height: 38px;
  border-radius: 4px;
  border: 2px solid transparent;
  overflow: hidden;
  display: block;
  transition: border-color 0.15s;
}
.tweak-theme-bar {
  position: absolute;
  left: 5px; right: 5px;
  top: 7px;
  height: 2px;
  border-radius: 1px;
  opacity: 0.8;
}
.tweak-theme-dot {
  position: absolute;
  left: 50%; bottom: 6px;
  transform: translateX(-50%);
  width: 10px; height: 10px;
  border-radius: 50%;
}
.tweak-theme-label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  color: var(--fg-dim);
}
.tweak-theme:hover .tweak-theme-chip { border-color: var(--fg-faint); }
.tweak-theme--active .tweak-theme-chip { border-color: var(--accent); }
.tweak-theme--active .tweak-theme-label { color: var(--accent); }

/* ================== THEMES ================== */
/* Full palette themes — override bg/fg/accent together */

body[data-theme="neon-green"] {
  --bg: #0A0A0A; --bg-2: #111111; --bg-3: #18181A;
  --fg: #F4F4F0;
  --fg-dim: rgba(244, 244, 240, 0.58);
  --fg-faint: rgba(244, 244, 240, 0.28);
  --line: rgba(244, 244, 240, 0.12);
  --line-2: rgba(244, 244, 240, 0.22);
  --accent: #D4FF3A; --accent-2: #B9FF00;
  --accent-dim: rgba(212, 255, 58, 0.35);
}

body[data-theme="paper"] {
  --bg: #F2EDE0; --bg-2: #EAE3D2; --bg-3: #DCD3BE;
  --fg: #1A1A1A;
  --fg-dim: rgba(26, 26, 26, 0.62);
  --fg-faint: rgba(26, 26, 26, 0.32);
  --line: rgba(26, 26, 26, 0.14);
  --line-2: rgba(26, 26, 26, 0.26);
  --accent: #E0432E; --accent-2: #C5331F;
  --accent-dim: rgba(224, 67, 46, 0.30);
}

body[data-theme="midnight"] {
  --bg: #07102A; --bg-2: #0D1938; --bg-3: #132147;
  --fg: #E8EEFC;
  --fg-dim: rgba(232, 238, 252, 0.58);
  --fg-faint: rgba(232, 238, 252, 0.26);
  --line: rgba(232, 238, 252, 0.12);
  --line-2: rgba(232, 238, 252, 0.22);
  --accent: #7CE7FF; --accent-2: #3ECDFF;
  --accent-dim: rgba(124, 231, 255, 0.32);
}

body[data-theme="sunset"] {
  --bg: #1B0F14; --bg-2: #261319; --bg-3: #321821;
  --fg: #FAE9DC;
  --fg-dim: rgba(250, 233, 220, 0.58);
  --fg-faint: rgba(250, 233, 220, 0.26);
  --line: rgba(250, 233, 220, 0.12);
  --line-2: rgba(250, 233, 220, 0.22);
  --accent: #FF8A3D; --accent-2: #FF6A12;
  --accent-dim: rgba(255, 138, 61, 0.32);
}

body[data-theme="mono"] {
  --bg: #000000; --bg-2: #0A0A0A; --bg-3: #141414;
  --fg: #FFFFFF;
  --fg-dim: rgba(255, 255, 255, 0.58);
  --fg-faint: rgba(255, 255, 255, 0.26);
  --line: rgba(255, 255, 255, 0.12);
  --line-2: rgba(255, 255, 255, 0.24);
  --accent: #FFFFFF; --accent-2: #DADADA;
  --accent-dim: rgba(255, 255, 255, 0.35);
}

/* Transitions so theme switches feel smooth */
body, .hero, .timeline-section, .footer, .race-card-face,
.tweaks-panel, .filter-pill, .timeline-arrow, .filters {
  transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease;
}

/* Layout variant: vertical stack */
body[data-layout="vertical"] .timeline-section .timeline-scroll { overflow-x: hidden; overflow-y: visible; }

/* Variant B: Soft edit — no track surface, more editorial feel */
body[data-variant="editorial"] .track-surface { opacity: 0.3; background: none; border: none; }
body[data-variant="editorial"] .track-lane-line { opacity: 0.4; }
body[data-variant="editorial"] .track-startline,
body[data-variant="editorial"] .track-finishline { opacity: 0.3; }

/* Variant C: Heavy mode - thicker lane lines, more track dominance */
body[data-variant="heavy"] .track-surface {
  background: linear-gradient(180deg, rgba(212, 255, 58, 0.08), rgba(212, 255, 58, 0.02));
}
body[data-variant="heavy"] .track-lane-line {
  background-image: repeating-linear-gradient(90deg, var(--fg-dim) 0 14px, transparent 14px 24px);
}

/* ================== FOOTER ================== */
.footer {
  padding: 60px 64px 40px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--fg-dim);
}
.footer-brand {
  font-family: var(--display);
  font-size: 28px;
  font-weight: 900;
  color: var(--fg);
  letter-spacing: -0.02em;
}