:root {
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --bg: #f8fafc;
  --card: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --danger: #dc2626;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

.site-header {
  background: var(--accent);
  padding: 10px 16px;
}

.back-link {
  color: #ffffff;
  text-decoration: none;
  font-size: 0.9rem;
}

.back-link:hover {
  text-decoration: underline;
}

h1 {
  font-size: 1.8rem;
  margin: 24px 0 4px;
}

.tagline {
  color: var(--muted);
  margin: 0 0 24px;
}

.field {
  display: block;
  margin-bottom: 16px;
}

.label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.9rem;
}

#pattern,
#text {
  font-family: 'Cascadia Code', Consolas, 'Courier New', monospace;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--text);
  font-size: 1rem;
}

#pattern:focus,
#text:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.flags {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
}

.flags .label {
  margin-bottom: 8px;
}

.flag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-right: 18px;
  font-family: 'Cascadia Code', Consolas, monospace;
  cursor: pointer;
}

.flag-desc {
  font-family: system-ui, sans-serif;
  color: var(--muted);
  font-size: 0.8rem;
}

.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

#examples {
  flex: 1;
  min-width: 200px;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  font-size: 0.95rem;
}

button {
  font-family: inherit;
  cursor: pointer;
}

#copyBtn,
#langToggle {
  background: var(--accent);
  color: #ffffff;
  border: none;
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 0.95rem;
}

#copyBtn:hover,
#langToggle:hover {
  background: var(--accent-dark);
}

#copyBtn:disabled {
  opacity: 0.7;
  cursor: default;
}

.error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: var(--danger);
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 16px;
  font-family: 'Cascadia Code', Consolas, monospace;
  font-size: 0.9rem;
}

.stats {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 16px 0 8px;
}

.match-count-label {
  font-weight: 600;
  color: var(--muted);
}

.match-count {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
}

.output-title {
  font-size: 1rem;
  margin: 20px 0 8px;
}

.highlight {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 80px;
}

.highlight mark {
  background: #bfdbfe;
  color: inherit;
  border-radius: 3px;
  padding: 0 1px;
}

.highlight mark.m1 { background: #fde68a; }
.highlight mark.m2 { background: #a7f3d0; }
.highlight mark.m3 { background: #fbcfe8; }
.highlight mark.m4 { background: #ddd6fe; }
.highlight mark.m5 { background: #fed7aa; }
.highlight mark.m6 { background: #a5f3fc; }
.highlight mark.m7 { background: #fecaca; }
.highlight mark.m8 { background: #e9d5ff; }
.highlight mark.m9 { background: #bbf7d0; }

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border-radius: 8px;
  overflow: hidden;
}

th,
td {
  text-align: left;
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}

th {
  background: #f1f5f9;
}

td.mono {
  font-family: 'Cascadia Code', Consolas, monospace;
}

.empty {
  color: var(--muted);
  text-align: center;
  padding: 16px;
}

.group {
  display: inline-block;
  margin: 2px 6px 2px 0;
}

.group-num {
  color: var(--accent);
  font-family: 'Cascadia Code', Consolas, monospace;
  margin-right: 6px;
}

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

.lang-bar {
  margin: 28px 0 8px;
  text-align: left;
}

.about {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}

[dir="rtl"] .flag {
  margin-right: 0;
  margin-left: 18px;
}

[dir="rtl"] .group-num {
  margin-right: 0;
  margin-left: 6px;
}

[dir="rtl"] th,
[dir="rtl"] td {
  text-align: right;
}

@media (max-width: 640px) {
  h1 {
    font-size: 1.4rem;
  }
  .flag {
    margin-bottom: 6px;
  }
  #copyBtn {
    width: 100%;
  }
}