:root {
  --canvas: #F4F5F7;
  --surface: #FFFFFF;
  --sunken: #EDEFF2;
  --border: #E1E4EA;
  --muted: #7A828F;
  --ink: #1B2027;
  --brand-50: #EAF1F9;
  --brand-100: #D5E2F2;
  --brand-200: #9FBADB;
  --brand-300: #6E92C4;
  --brand-400: #406EAA;
  --brand-500: #1F3A68;
  --brand-600: #19314F;
  --warn: #B45309;
  --warn-soft: #FCEDE0;
  --danger: #9A1F2C;
  --danger-soft: #F7E1E5;
  --ok: #3F6B58;
  color-scheme: light;
}
.theme-dark {
  --canvas: #0F1115;
  --surface: #16191F;
  --sunken: #1B1F26;
  --border: #262A33;
  --muted: #8C95A4;
  --ink: #E6E8EC;
  --brand-50: rgba(31, 58, 104, 0.18);
  --brand-100: rgba(31, 58, 104, 0.30);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  font-family: -apple-system, "Segoe UI", "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  background: var(--canvas);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }
button { font: inherit; cursor: pointer; }

.app { display: flex; min-height: 100vh; }

/* ===== Sidebar ===== */
.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 20px 12px 16px;
  display: flex; flex-direction: column;
}
.brand { display: flex; align-items: center; gap: 10px; padding: 0 8px 18px; border-bottom: 1px solid var(--border); margin-bottom: 14px; }
.brand-mark { width: 22px; height: 22px; border-radius: 6px; background: linear-gradient(135deg, var(--brand-300), var(--brand-500)); }
.brand-title { font-weight: 600; font-size: 15px; letter-spacing: -0.01em; }
.brand-sub { font-size: 11px; color: var(--muted); margin-top: 2px; }
.nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.nav-item {
  display: block; padding: 8px 12px; border-radius: 6px; font-size: 13px; color: var(--ink);
  transition: background-color 0.15s;
}
.nav-item:hover { background: var(--sunken); text-decoration: none; }
.nav-item.active { background: var(--brand-50); color: var(--brand-500); font-weight: 500; }
.theme-toggle {
  margin-top: 12px;
  padding: 8px 12px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  text-align: left;
}
.theme-toggle:hover { background: var(--sunken); }

/* ===== Topbar / Main ===== */
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 18px 32px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.topbar-eyebrow { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.topbar-title { font-size: 20px; font-weight: 600; margin: 4px 0 0; letter-spacing: -0.01em; }
.btn-secondary {
  font-size: 12px; padding: 8px 14px; border-radius: 6px;
  border: 1px solid var(--border); background: transparent; color: var(--ink);
}
.btn-secondary:hover { background: var(--sunken); text-decoration: none; }
.content { padding: 24px 32px; flex: 1; }
.loader { color: var(--muted); font-size: 13px; }

/* ===== Cards ===== */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.06);
}
.card-header { padding: 20px 20px 12px; }
.card-title { font-size: 13px; font-weight: 600; letter-spacing: 0.01em; margin: 0; }
.card-desc { font-size: 12px; color: var(--muted); margin: 6px 0 0; line-height: 1.55; }
.card-body { padding: 0 20px 20px; }
.card-body.flush { padding: 0; }

/* ===== Grid ===== */
.grid { display: grid; gap: 18px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-kpi { grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 14px; }
.grid-metric { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.col-2 { grid-column: span 2; }
@media (max-width: 1100px) { .grid-3 { grid-template-columns: 1fr 1fr; } .grid-kpi { grid-template-columns: repeat(3, 1fr); } .col-2 { grid-column: span 2; } }
@media (max-width: 720px) { .grid-3, .grid-2, .grid-kpi, .grid-metric { grid-template-columns: 1fr; } .col-2 { grid-column: span 1; } }

/* ===== KPI ===== */
.kpi {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}
.kpi-label { font-size: 11px; color: var(--muted); }
.kpi-value { font-size: 28px; font-family: "SF Mono", "Roboto Mono", "Menlo", monospace; font-weight: 600; margin-top: 6px; letter-spacing: -0.02em; }
.kpi-delta { font-size: 11px; color: var(--muted); margin-top: 6px; }
.accent-brand { color: var(--brand-500); }
.accent-warn { color: var(--warn); }
.accent-danger { color: var(--danger); }

/* ===== Table ===== */
.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl thead th {
  font-size: 10px; text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--muted); font-weight: 500;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding: 8px 12px; text-align: left;
}
.tbl tbody td { padding: 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.tbl tbody tr:hover td { background: rgba(122, 130, 143, 0.06); }
.tbl .num { text-align: right; font-variant-numeric: tabular-nums; font-family: "SF Mono", "Roboto Mono", monospace; font-size: 12px; }
.tbl .pad-l { padding-left: 20px; } .tbl .pad-r { padding-right: 20px; }

/* ===== Badges ===== */
.badge { display: inline-flex; align-items: center; padding: 2px 8px; border-radius: 4px; font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; }
.badge-CRITICAL { background: var(--danger); color: white; }
.badge-MAJOR { background: var(--warn); color: white; }
.badge-MINOR { background: var(--warn-soft); color: var(--warn); border: 1px solid var(--warn); }
.badge-INFO { color: var(--muted); border: 1px solid var(--muted); }
.pill { display: inline-flex; padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 500; }
.pill-GREEN { color: var(--muted); background: var(--sunken); }
.pill-YELLOW { color: var(--warn); background: var(--warn-soft); }
.pill-RED { color: var(--danger); background: var(--danger-soft); }

/* ===== Health meter ===== */
.health { display: flex; align-items: center; gap: 8px; min-width: 140px; }
.health-num { font-family: "SF Mono", monospace; font-variant-numeric: tabular-nums; font-size: 12px; width: 28px; text-align: right; }
.health-bar { flex: 1; height: 5px; background: var(--sunken); border-radius: 999px; overflow: hidden; }
.health-bar > span { display: block; height: 100%; transition: width 0.3s; }

/* ===== Charts ===== */
.chart-wrap { position: relative; height: 240px; }
.chart-wrap.tall { height: 280px; }

/* ===== Heatmap ===== */
.heatmap { display: grid; grid-template-columns: 80px repeat(6, 1fr); gap: 4px; font-size: 11px; }
.heatmap .label { color: var(--muted); padding: 6px 4px; font-size: 10px; text-transform: uppercase; letter-spacing: 0.05em; display: flex; align-items: center; }
.heatmap .row-label { justify-content: flex-end; padding-right: 12px; }
.heatmap .cell {
  height: 36px; display: flex; align-items: center; justify-content: center;
  border-radius: 4px; font-family: "SF Mono", monospace; font-variant-numeric: tabular-nums;
}

/* ===== Filters ===== */
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.input, .select {
  font-size: 12px; padding: 6px 10px; border-radius: 6px;
  border: 1px solid var(--border); background: var(--canvas); color: var(--ink);
}
.input { width: 220px; }
.checkbox { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); }

/* ===== Project detail ===== */
.detail-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 32px; }
.detail-head h2 { font-size: 24px; margin: 6px 0 12px; letter-spacing: -0.01em; }
.detail-head .meta { display: flex; gap: 14px; font-size: 13px; color: var(--muted); }
.score-big { font-family: "SF Mono", monospace; font-size: 44px; font-weight: 600; letter-spacing: -0.03em; }
.score-sub { font-size: 11px; color: var(--muted); }

.list-clean { list-style: none; padding: 0; margin: 0; }
.list-clean li { padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 13px; }
.list-clean li:last-child { border-bottom: 0; }

.action-item {
  border-left: 2px solid var(--brand-200);
  padding: 8px 0 8px 12px;
  margin-bottom: 12px;
  font-size: 13px;
}
.action-status {
  font-size: 9px; text-transform: uppercase; letter-spacing: 0.06em;
  font-weight: 700; color: var(--muted); margin-right: 8px;
}
.action-meta { font-size: 11px; color: var(--muted); margin-top: 4px; }

.ph-row { display: flex; align-items: center; gap: 12px; font-size: 13px; padding: 6px 0; color: var(--muted); }
.ph-row.now { color: var(--ink); font-weight: 500; }
.ph-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border); }
.ph-row.now .ph-dot { background: var(--brand-500); }
.ph-name { width: 140px; font-size: 12px; }
.ph-range { font-family: "SF Mono", monospace; font-size: 11px; }

/* ===== Improvements page ===== */
.improve-hero {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  margin-bottom: 24px;
}
.improve-hero h2 { margin: 0; font-size: 20px; letter-spacing: -0.01em; }
.improve-hero p { color: var(--muted); font-size: 14px; line-height: 1.7; margin: 12px 0 0; }
.improve-hero .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.improve-hero .tag { font-size: 11px; padding: 4px 10px; border-radius: 999px; background: var(--sunken); color: var(--muted); }

.section-divider { display: flex; align-items: center; gap: 12px; margin: 24px 4px 12px; }
.section-divider .line { flex: 1; height: 1px; background: var(--border); }
.section-divider .label { font-size: 10px; font-weight: 600; letter-spacing: 0.18em; color: var(--muted); text-transform: uppercase; }

.diff-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}
.diff-title { font-size: 14px; font-weight: 600; margin: 0 0 14px; line-height: 1.4; }
.diff-grid { display: grid; grid-template-columns: 1fr auto 1fr; gap: 12px; align-items: stretch; font-size: 12px; }
@media (max-width: 720px) { .diff-grid { grid-template-columns: 1fr; } .diff-grid .arrow { display: none; } }
.diff-box {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  background: var(--canvas);
  line-height: 1.6;
}
.diff-box.after { border-color: var(--brand-200); background: var(--brand-50); }
.diff-box .label { font-size: 9px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); margin-bottom: 4px; }
.diff-box.after .label { color: var(--brand-500); }
.diff-grid .arrow { display: flex; align-items: center; color: var(--muted); }
.diff-why { font-size: 12px; line-height: 1.7; margin-top: 14px; white-space: pre-line; }
.diff-why .label { font-size: 9px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); margin-bottom: 4px; }
.diff-files { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 12px; }
.diff-files code {
  font-size: 10px; font-family: "SF Mono", monospace;
  padding: 2px 8px; border-radius: 4px;
  background: var(--sunken); color: var(--muted);
}

.stack { display: flex; flex-direction: column; gap: 18px; }
.eyebrow { font-size: 11px; color: var(--muted); margin-bottom: 12px; }