:root {
  --bg: #ffffff;
  --panel: #f6f8fa;
  --border: #d0d7de;
  --text: #1f2328;
  --text-dim: #57606a;
  --accent: #0969da;
  --accent-bg: rgba(9, 105, 218, 0.08);
  --accent-bg-strong: rgba(9, 105, 218, 0.15);
  --hit: #cf222e;
  --pos: #1a7f37;
}

* { box-sizing: border-box; }

html, body { max-width: 100%; overflow-x: hidden; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  word-break: break-word;
}

img, canvas, svg { max-width: 100%; height: auto; }

header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border);
}

header h1 {
  margin: 0 0 0.3rem;
  font-size: 1.4rem;
  font-weight: 600;
}

.meta {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.meta a { color: var(--accent); text-decoration: none; }
.meta a:hover { text-decoration: underline; }
.sep { margin: 0 0.6rem; }

nav {
  padding: 0 2rem;
  display: flex;
  gap: 0;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

nav button {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-dim);
  padding: 0.9rem 1.2rem;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: -1px;
  transition: color 0.15s, border-color 0.15s;
}

nav button:hover { color: var(--text); }
nav button.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.channel { display: none; }
.channel.active { display: block; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

main {
  padding: 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.channel { margin-bottom: 3rem; }

.channel h2 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.kpi-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.kpi {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.4rem;
  min-width: 140px;
}

.kpi-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 0.3rem;
}

.kpi-value {
  font-size: 1.4rem;
  font-weight: 600;
}

.kpi-value.pos { color: var(--pos); }
.kpi-value.neg { color: var(--hit); }
.kpi-value.warmup { color: #9a6700; }
.kpi-value.hit { color: var(--hit); }

.kpi-sub {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 0.2rem;
}

.kpi-delta {
  font-size: 0.8rem;
  margin-left: 0.5rem;
}

.kpi-delta.pos { color: var(--pos); }
.kpi-delta.neg { color: var(--hit); }

.ch-date {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-weight: 400;
  margin-left: 0.6rem;
}

.charts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 1200px) {
  .charts { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 700px) {
  .charts { grid-template-columns: 1fr; }
}

.chart-box {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
}

.chart-box h3 {
  margin: 0 0 0.8rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-dim);
}

.chart-canvas { height: 240px; }
.charts-full { grid-column: 1 / -1; }

.section-title {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-dim);
  margin: 1.5rem 0 0.8rem;
}

.hits {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

.hit {
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--hit);
  border-radius: 6px;
  padding: 0.8rem 1rem;
  text-decoration: none;
  color: var(--text);
  display: block;
}

.hit:hover { border-color: var(--accent); border-left-color: var(--accent); }

.hit-title {
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.hit-meta {
  font-size: 0.78rem;
  color: var(--text-dim);
  display: flex;
  gap: 0.8rem;
}

.hit-meta .views { color: var(--hit); font-weight: 600; }

.hit.rising { border-left-color: #bf8700; }
.hit.rising:hover { border-left-color: var(--accent); }
.hit-meta .rising-delta {
  color: #bf8700;
  font-weight: 700;
}

.card-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.4rem;
  margin: 0.6rem 0 0.4rem;
}
.card-metric {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.35rem 0.5rem;
  text-align: center;
  min-width: 0;
}
.card-metric-label {
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 0.03em;
  margin-bottom: 0.1rem;
  white-space: nowrap;
}
.card-metric-value {
  font-size: 0.82rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.card-metric-value.pos { color: var(--pos); }
.card-metric-value.neg { color: var(--hit); }
.card-metric-value.muted { color: var(--text-dim); font-weight: 500; }

.empty {
  color: var(--text-dim);
  font-style: italic;
  font-size: 0.9rem;
  padding: 1rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
}

/* === 動画別 views 推移 並び替えタブ === */
.video-sort-tabs {
  display: flex;
  gap: 0.4rem;
  margin: 0 0 0.7rem;
  flex-wrap: wrap;
}
.vsort {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  font-size: 0.82rem;
  cursor: pointer;
  color: var(--text-dim);
  font-weight: 500;
  transition: all 0.15s;
}
.vsort:hover { color: var(--text); }
.vsort.active {
  background: var(--accent-bg);
  border-color: var(--accent);
  color: var(--accent);
}

.vrow-label {
  color: var(--text-dim);
  font-weight: 500;
  font-size: 0.72rem;
}
.vrow-delta { font-weight: 700; }
.vrow-delta.pos { color: var(--pos); }
.vrow-delta.neg { color: var(--hit); }
.vrow-cum {
  color: var(--text-dim);
  font-weight: 500;
  font-size: 0.72rem;
}

.vrow-accel {
  color: var(--pos);
  font-size: 0.95rem;
  line-height: 1;
  margin-left: 0.2rem;
  cursor: help;
}

/* === 動画選択リスト === */
.video-section {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 1rem;
}

@media (max-width: 900px) {
  .video-section { grid-template-columns: 1fr; }
}

.video-list {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  max-height: 420px;
  overflow-y: auto;
}

.video-row {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.1s;
  border-left: 3px solid transparent;
}

.video-row:last-child { border-bottom: none; }
.video-row:hover { background: var(--accent-bg); }
.video-row.tier-hit { border-left-color: var(--hit); }
.video-row.tier-cold { opacity: 0.55; }
.video-row.active {
  background: var(--accent-bg-strong);
  border-left-color: var(--accent);
  opacity: 1;
}
.video-row.tier-hit .views {
  color: var(--hit);
  font-weight: 700;
}
.video-row.tier-cold .views {
  color: var(--text-dim);
  font-weight: normal;
}

.video-row-title {
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.3rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-row-meta {
  font-size: 0.75rem;
  color: var(--text-dim);
  display: flex;
  gap: 0.6rem;
}

.video-row-meta .views {
  color: var(--accent);
  font-weight: 600;
}

.video-chart-canvas { height: 360px; }

.video-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.6rem;
  gap: 0.5rem;
}

.video-nav button {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: border-color 0.15s, color 0.15s;
}

.video-nav button:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}

.video-nav button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.video-nav-pos {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.video-nav-hint {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* === 急伸ウォッチ === */
.rw-header { margin-bottom: 1rem; }
.rw-header h2 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}
.rw-help {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin: 0 0 0.8rem;
  line-height: 1.5;
}
.rw-help strong { color: var(--text); font-weight: 600; }

.rw-filter-group {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-top: 0.6rem;
  flex-wrap: wrap;
}

.rw-filter-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  flex-shrink: 0;
}

.rw-filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.rw-filter {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  font-size: 0.82rem;
  cursor: pointer;
  color: var(--text-dim);
  font-weight: 500;
  transition: all 0.15s;
}
.rw-filter:hover { color: var(--text); }
.rw-filter.active {
  background: var(--accent-bg);
  border-color: var(--accent);
  color: var(--accent);
}

.rw-table-wrap {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow-x: auto;
}
.rw-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
}
.rw-table thead th {
  text-align: left;
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  font-weight: 600;
  background: var(--panel);
  white-space: nowrap;
}
.rw-table tbody td {
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.rw-table tbody tr:last-child td { border-bottom: none; }
.rw-table tbody tr:hover { background: var(--accent-bg); }

.rw-col-title { min-width: 280px; }
.rw-title {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  display: block;
  margin-bottom: 0.3rem;
  line-height: 1.35;
}
.rw-title:hover { color: var(--accent); text-decoration: underline; }
.rw-sub {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.74rem;
  color: var(--text-dim);
}

.rw-tier {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.rw-tier-hit {
  background: rgba(207, 34, 46, 0.12);
  color: var(--hit);
  border: 1px solid rgba(207, 34, 46, 0.3);
}
.rw-tier-warmup {
  background: rgba(191, 135, 0, 0.12);
  color: #9a6700;
  border: 1px solid rgba(191, 135, 0, 0.3);
}

.rw-channel {
  font-size: 0.74rem;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 200px;
}

.rw-num, .rw-age, .rw-day, .rw-total, .rw-trend {
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.rw-age { color: var(--text-dim); }
.rw-num { font-weight: 600; }
.rw-total {
  font-weight: 700;
  color: var(--pos);
}
.rw-trend {
  text-align: center;
  font-size: 1.1rem;
  font-weight: 700;
}
.trend-accel { color: var(--pos); }
.trend-decel { color: var(--hit); }
.trend-flat { color: var(--text-dim); }

.rw-day {
  font-size: 0.85rem;
}
.rw-day-empty { color: var(--text-dim); opacity: 0.4; }
.rw-day-zero { color: var(--text-dim); }
.rw-day-low { color: var(--pos); opacity: 0.7; }
.rw-day-mid { color: var(--pos); font-weight: 600; }
.rw-day-strong {
  color: var(--pos);
  font-weight: 700;
  background: rgba(26, 127, 55, 0.1);
}

/* === レスポンシブ === */
@media (max-width: 768px) {
  header { padding: 1rem; }
  header h1 { font-size: 1.15rem; }
  nav { padding: 0 0.5rem; gap: 0; }
  nav button { padding: 0.7rem 0.7rem; font-size: 0.85rem; }
  main { padding: 1rem; }
  .channel h2 { font-size: 1.05rem; }
  .kpi { min-width: 0; flex: 1 1 calc(50% - 0.5rem); padding: 0.7rem 0.9rem; }
  .kpi-value { font-size: 1.1rem; }
  .kpi-label { font-size: 0.7rem; }
  .chart-box { padding: 0.7rem; }
  .chart-canvas { height: 200px; }
  .video-chart-canvas { height: 280px; }
  .video-list { max-height: 300px; }
  .hits { grid-template-columns: 1fr; }

  /* 急伸ウォッチをモバイルではコンパクトに */
  .rw-table { font-size: 0.78rem; }
  .rw-table thead th { padding: 0.5rem 0.5rem; font-size: 0.68rem; }
  .rw-table tbody td { padding: 0.5rem 0.5rem; }
  .rw-col-title { min-width: 200px; }
  .rw-channel { max-width: 130px; }
}

@media (max-width: 480px) {
  header { padding: 0.8rem; }
  main { padding: 0.6rem; }
  .kpi { flex: 1 1 100%; }
  .chart-canvas { height: 180px; }
  .video-chart-canvas { height: 240px; }
  .video-nav { flex-direction: column; align-items: flex-start; gap: 0.3rem; }
}