:root {
  color-scheme: dark;
  --bg: #0d1117;
  --panel: #151b23;
  --panel-2: #10161e;
  --line: rgba(255, 255, 255, 0.1);
  --line-strong: rgba(255, 255, 255, 0.18);
  --text: #f3f6fb;
  --muted: #9fb0c3;
  --muted-2: #7b8a9a;
  --accent: #6dc2ff;
  --shadow: 0 16px 48px rgba(0, 0, 0, 0.28);
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --top-safe: max(16px, env(safe-area-inset-top));
  --bottom-safe: max(16px, env(safe-area-inset-bottom));
  --left-col-width: 164px;
  --cell-size: 72px;
  --year-col-width: 74px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: radial-gradient(circle at top, #16202d 0%, var(--bg) 45%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  padding: var(--top-safe) 14px var(--bottom-safe);
  overflow-x: hidden;
}

button,
input,
select {
  font: inherit;
}

.app-shell {
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
}

.topbar {
  margin-bottom: 14px;
  padding: 14px 4px 0;
}

.eyebrow {
  margin: 0 0 6px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  color: var(--accent);
}

h1,
h2 {
  margin: 0;
}

h1 {
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  line-height: 1.02;
}

h2 {
  font-size: 1.05rem;
}

.subtle,
.hint {
  color: var(--muted);
}

.subtle {
  margin: 8px 0 0;
}

.page {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.panel {
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
  min-width: 0;
}

.controls-panel {
  padding: 14px;
  display: grid;
  gap: 14px;
}

.upload-block {
  display: grid;
  gap: 8px;
}

.upload-label,
.stat-label {
  color: var(--muted);
  font-size: 0.85rem;
}

.file-input {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line-strong);
  background: rgba(255,255,255,0.04);
  color: var(--text);
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.stat-card {
  padding: 12px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.035);
  border: 1px solid var(--line);
  display: grid;
  gap: 6px;
}

.stat-card strong {
  font-size: 1.05rem;
}

.status-message {
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.035);
  color: var(--text);
}

.status-message.info {
  border-color: rgba(109, 194, 255, 0.25);
}

.status-message.error {
  border-color: rgba(255, 120, 120, 0.35);
  background: rgba(255, 90, 90, 0.08);
}

.timeline-panel {
  padding: 14px;
  overflow: hidden;
  min-width: 0;
}

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

.timeline-wrap {
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: auto;
  max-height: calc(100vh - 260px);
  background: rgba(255,255,255,0.02);
  max-width: 100%;
}

.timeline-wrap.empty-state {
  display: grid;
  place-items: center;
  min-height: 320px;
}

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

.timeline-table {
  width: max-content;
  min-width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

.timeline-table th,
.timeline-table td {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.timeline-table thead th {
  position: sticky;
  top: 0;
  z-index: 4;
  background: rgba(13, 17, 23, 0.96);
  backdrop-filter: blur(10px);
}

.corner-header {
  left: 0;
  z-index: 6 !important;
  min-width: var(--left-col-width);
  width: var(--left-col-width);
  text-align: left;
  padding: 12px;
}

.year-header {
  width: var(--year-col-width);
  min-width: var(--year-col-width);
  padding: 10px 8px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--muted);
}

.row-header {
  position: sticky;
  left: 0;
  z-index: 3;
  min-width: var(--left-col-width);
  width: var(--left-col-width);
  background: rgba(16, 22, 30, 0.96);
  backdrop-filter: blur(8px);
  padding: 10px 12px;
  text-align: left;
}

.row-label {
  display: grid;
  gap: 4px;
}

.row-label strong {
  font-size: 0.92rem;
  line-height: 1.1;
}

.row-years {
  color: var(--muted-2);
  font-size: 0.74rem;
}

.logo-cell,
.empty-cell {
  width: var(--year-col-width);
  min-width: var(--year-col-width);
  height: calc(var(--cell-size) + 10px);
  padding: 6px;
  background: rgba(255,255,255,0.01);
}

.logo-card,
.empty-card {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
}

.logo-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  border: 1px solid rgba(255,255,255,0.08);
  overflow: hidden;
}

.logo-card img {
  display: block;
  width: calc(var(--cell-size) - 8px);
  height: calc(var(--cell-size) - 8px);
  object-fit: contain;
}

.empty-card {
  border: 1px dashed rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.02);
  opacity: 0.42;
}

@media (max-width: 820px) {
  :root {
    --left-col-width: 124px;
    --cell-size: 58px;
    --year-col-width: 62px;
  }

  body {
    padding-left: 10px;
    padding-right: 10px;
  }

  .controls-panel,
  .timeline-panel {
    padding: 12px;
  }

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

  .timeline-wrap {
    max-height: calc(100vh - 310px);
  }

  .row-label strong {
    font-size: 0.84rem;
  }

  .year-header {
    font-size: 0.74rem;
  }
}