:root {
  --bg: #f5f1e8;
  --surface: #ffffff;
  --surface-2: #faf6ec;
  --ink: #1a1a1a;
  --ink-2: #4a4a4a;
  --muted: #6e6862;
  --divider: #ddd2bd;
  --accent: #2d604a;
  --accent-soft: #e6efea;
  --danger: #c44e3c;
  --warning: #c8862a;

  --cat-A: #c44e3c;
  --cat-B: #b46827;
  --cat-C: #8e6c00;
  --cat-D: #c44e3c;
  --cat-E: #5a6b3f;
  --cat-F: #6f5b9c;
  --cat-G: #4a7791;
  --cat-H: #b46827;
  --cat-I: #8e6c00;
  --cat-J: #6f5b9c;

  --radius: 10px;
  --shadow: 0 1px 0 rgba(26, 26, 26, 0.04), 0 4px 16px rgba(26, 26, 26, 0.04);
  --font-sans: 'Pretendard Variable', Pretendard, -apple-system, system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.site-header {
  max-width: 1180px;
  margin: 0 auto;
  padding: 56px 32px 32px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 12px;
}

.brand-mark {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-tag {
  font-size: 16px;
  color: var(--muted);
  font-weight: 500;
}

.brand-sub {
  margin: 0;
  max-width: 780px;
  color: var(--ink-2);
  font-size: 15px;
}

.brand-sub em {
  font-style: normal;
  color: var(--ink);
  font-weight: 600;
}

.layout {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 32px 64px;
  display: grid;
  gap: 24px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--divider);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 16px;
}

.panel-head h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.char-count {
  font-size: 13px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

textarea {
  width: 100%;
  min-height: 240px;
  padding: 16px;
  border: 1px solid var(--divider);
  border-radius: 8px;
  background: var(--surface-2);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  resize: vertical;
}

textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

.actions {
  margin-top: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.severity {
  font-size: 14px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.severity select {
  padding: 6px 10px;
  border: 1px solid var(--divider);
  border-radius: 6px;
  background: var(--surface);
  font-family: var(--font-sans);
  font-size: 14px;
}

button {
  cursor: pointer;
  font-family: var(--font-sans);
}

#runBtn {
  padding: 12px 28px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  transition: background 150ms;
}

#runBtn:hover {
  background: #244e3c;
}

#runBtn:disabled {
  background: var(--muted);
  cursor: progress;
}

.error {
  margin: 12px 0 0;
  padding: 10px 14px;
  background: #fbe9e6;
  color: var(--danger);
  border-radius: 6px;
  font-size: 14px;
}

.grade {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--ink-2);
  font-weight: 500;
}

.grade-badge {
  display: inline-block;
  width: 28px;
  height: 28px;
  line-height: 28px;
  text-align: center;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
}

.grade-badge.D,
.grade-badge.C {
  background: var(--warning);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.metric {
  background: var(--surface-2);
  border: 1px solid var(--divider);
  border-radius: 8px;
  padding: 12px 14px;
}

.metric-label {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 4px;
}

.metric-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.metric-value small {
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
  margin-left: 4px;
}

.diff {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.diff-col h3 {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.copy-btn {
  padding: 4px 10px;
  font-size: 12px;
  background: transparent;
  border: 1px solid var(--divider);
  border-radius: 4px;
  color: var(--ink-2);
}

.copy-btn:hover {
  background: var(--surface-2);
}

.text-render {
  background: var(--surface-2);
  border: 1px solid var(--divider);
  border-radius: 8px;
  padding: 18px;
  font-size: 15px;
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 240px;
  max-height: 520px;
  overflow-y: auto;
}

.hl {
  background: rgba(196, 78, 60, 0.12);
  border-bottom: 2px solid var(--cat-A);
  padding: 0 1px;
  border-radius: 2px;
  cursor: help;
}

.hl[data-cat='A'] { border-color: var(--cat-A); background: rgba(196, 78, 60, 0.1); }
.hl[data-cat='B'] { border-color: var(--cat-B); background: rgba(180, 104, 39, 0.1); }
.hl[data-cat='C'] { border-color: var(--cat-C); background: rgba(142, 108, 0, 0.12); }
.hl[data-cat='D'] { border-color: var(--cat-D); background: rgba(196, 78, 60, 0.12); }
.hl[data-cat='E'] { border-color: var(--cat-E); background: rgba(90, 107, 63, 0.1); }
.hl[data-cat='F'] { border-color: var(--cat-F); background: rgba(111, 91, 156, 0.1); }
.hl[data-cat='G'] { border-color: var(--cat-G); background: rgba(74, 119, 145, 0.1); }
.hl[data-cat='H'] { border-color: var(--cat-H); background: rgba(180, 104, 39, 0.1); }
.hl[data-cat='I'] { border-color: var(--cat-I); background: rgba(142, 108, 0, 0.12); }
.hl[data-cat='J'] { border-color: var(--cat-J); background: rgba(111, 91, 156, 0.1); }

.hl[data-sev='S1'] { background-image: linear-gradient(transparent 88%, currentColor 88%); }

.categories {
  margin-bottom: 16px;
}

.categories table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.categories th,
.categories td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--divider);
}

.categories th {
  font-weight: 600;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.categories td.num {
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.categories td.delta-pos { color: var(--accent); font-weight: 600; }
.categories td.delta-neg { color: var(--danger); font-weight: 600; }

.findings-detail {
  margin-top: 16px;
}

.findings-detail summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 14px;
  padding: 8px 0;
}

.findings-list {
  margin: 0;
  padding-left: 24px;
  font-size: 14px;
  color: var(--ink-2);
}

.findings-list li {
  margin-bottom: 8px;
  padding-left: 6px;
}

.findings-list .pid {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 12px;
  background: var(--surface-2);
  padding: 1px 6px;
  border-radius: 3px;
  margin-right: 6px;
}

.site-footer {
  max-width: 1180px;
  margin: 0 auto;
  padding: 32px;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid var(--divider);
}

.site-footer a {
  color: var(--ink-2);
}

.site-footer .disclaimer {
  margin-top: 6px;
  font-size: 12px;
}

@media (max-width: 768px) {
  .site-header {
    padding: 32px 20px 16px;
  }
  .layout {
    padding: 0 20px 48px;
  }
  .brand {
    flex-direction: column;
    gap: 4px;
  }
  .brand-mark {
    font-size: 28px;
  }
  .diff {
    grid-template-columns: 1fr;
  }
}