*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #1C4D8D;
  --primary-dark: #093C5D;
  --primary-light: #dbeafe;
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
  --radius: 16px;
  --hero-gradient: linear-gradient(135deg, #051e3e 0%, #093C5D 50%, #1C4D8D 100%);
  --nav-bg: #ffffff;
}

[data-theme="dark"] {
  --primary: #4d8fd4;
  --primary-dark: #93c5fd;
  --primary-light: #1e3a5f;
  --bg: #0f172a;
  --surface: #1e293b;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --border: #334155;
  --shadow: 0 1px 3px rgba(0,0,0,.3), 0 4px 16px rgba(0,0,0,.2);
  --hero-gradient: linear-gradient(135deg, #020c1b 0%, #051e3e 50%, #093C5D 100%);
  --nav-bg: #1e293b;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background .2s, color .2s;
}

/* ── Nav ── */
.site-nav {
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.site-nav a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  transition: color .15s;
}
.site-nav a:hover { color: var(--primary); }
.nav-sep { color: var(--border); margin: 0 2px; }
.nav-current { color: var(--text); font-weight: 600; font-size: 0.875rem; }
.nav-spacer { flex: 1; }
.theme-toggle {
  background: #1C4D8D; border: 1px solid #093C5D; border-radius: 8px;
  width: 36px; height: 36px; cursor: pointer; font-size: 1.2rem;
  display: flex; align-items: center; justify-content: center;
  transition: background .15s, border-color .15s; flex-shrink: 0;
}
.theme-toggle:hover { background: #093C5D; border-color: #051e3e; }
[data-theme="dark"] .theme-toggle { background: #334155; border-color: #475569; }

/* ── Hero ── */
.hero {
  background: var(--hero-gradient);
  color: #fff;
  padding: 28px 24px 40px;
  text-align: center;
}
.tool-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2);
  border-radius: 20px; padding: 4px 14px; font-size: 0.8rem; font-weight: 600;
  margin-bottom: 16px;
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800; letter-spacing: -0.5px; margin-bottom: 12px;
}
.hero p { color: rgba(255,255,255,.75); font-size: 1.05rem; max-width: 480px; margin: 0 auto; }

/* ── Footer ── */
.site-footer {
  text-align: center; padding: 32px 24px;
  color: var(--text-muted); font-size: 0.875rem;
  border-top: 1px solid var(--border);
}
.site-footer a { color: var(--primary); text-decoration: none; }

/* ── Cards / common ── */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px;
  box-shadow: var(--shadow); margin-bottom: 20px;
}
.card-title {
  font-size: 0.8rem; font-weight: 700; letter-spacing: 1px;
  text-transform: uppercase; color: var(--text-muted); margin-bottom: 16px;
}
label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 8px; }
textarea, input[type="text"], input[type="number"], input[type="password"], select {
  width: 100%; padding: 12px 16px; border: 1.5px solid var(--border);
  border-radius: 10px; font-size: 1rem; font-family: inherit;
  background: var(--bg); color: var(--text); outline: none;
  transition: border-color .15s, box-shadow .15s;
}
textarea:focus, input:focus, select:focus {
  border-color: var(--primary); box-shadow: 0 0 0 3px rgba(28,77,141,.12);
}
[data-theme="dark"] textarea,
[data-theme="dark"] input[type="text"],
[data-theme="dark"] input[type="number"],
[data-theme="dark"] input[type="password"],
[data-theme="dark"] input[type="search"],
[data-theme="dark"] select { background: var(--bg); color: var(--text); border-color: var(--border); }
button {
  cursor: pointer; font-family: inherit;
  border-radius: 10px; font-weight: 600; transition: all .15s;
}

/* ── Dark mode: override hardcoded #fff / #f8fafc in tool inline styles ── */
[data-theme="dark"] .card { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .hash-value { background: var(--bg) !important; color: var(--text) !important; }
[data-theme="dark"] .tab.active { background: var(--surface) !important; }
[data-theme="dark"] .highlighted { background: var(--bg) !important; color: var(--text) !important; }
[data-theme="dark"] .pattern-wrap { background: var(--bg) !important; }
[data-theme="dark"] .mode-chip,
[data-theme="dark"] .flag-chip,
[data-theme="dark"] .filter-btn { background: var(--surface) !important; color: var(--text-muted) !important; border-color: var(--border) !important; }
[data-theme="dark"] textarea { background: var(--bg) !important; color: var(--text) !important; }
[data-theme="dark"] pre { background: var(--bg) !important; color: var(--text) !important; }
[data-theme="dark"] .qr-wrapper,
[data-theme="dark"] .output-box,
[data-theme="dark"] .result-box,
[data-theme="dark"] .preview-pane { background: var(--surface) !important; color: var(--text) !important; }
/* Catch-all: any element with inline or class bg:#fff */
[data-theme="dark"] input[type="search"] { background: var(--bg) !important; color: var(--text) !important; }
[data-theme="dark"] .indent-row select { background: var(--bg) !important; color: var(--text) !important; }
[data-theme="dark"] .parent-inputs input { background: var(--bg) !important; color: var(--text) !important; }

/* ── Regex tester ── */
[data-theme="dark"] .matches-table tr:nth-child(even) td { background: rgba(255,255,255,.04) !important; }
[data-theme="dark"] .matches-table td, [data-theme="dark"] .matches-table th { color: var(--text) !important; border-color: var(--border) !important; }
[data-theme="dark"] .highlighted { background: var(--bg) !important; color: var(--text) !important; }
[data-theme="dark"] mark { background: #854d0e !important; color: #fef9c3 !important; }
[data-theme="dark"] .stat.has-match { background: #052e16 !important; border-color: #166534 !important; color: #86efac !important; }
[data-theme="dark"] .stat.no-match { background: #450a0a !important; border-color: #991b1b !important; color: #fca5a5 !important; }
[data-theme="dark"] .pattern-wrap { background: var(--bg) !important; }

/* ── JSON formatter ── */
[data-theme="dark"] pre { background: #0d1117 !important; color: #e2e8f0 !important; border-color: var(--border) !important; }
[data-theme="dark"] .status.error { background: #450a0a !important; color: #fca5a5 !important; border-color: #991b1b !important; }

/* ── Markdown to HTML ── */
[data-theme="dark"] .preview { background: var(--surface) !important; color: var(--text) !important; }
[data-theme="dark"] .preview h1,[data-theme="dark"] .preview h2,[data-theme="dark"] .preview h3,
[data-theme="dark"] .preview h4,[data-theme="dark"] .preview p,[data-theme="dark"] .preview li { color: var(--text) !important; }

/* ── Base64 / general error ── */
[data-theme="dark"] .error { color: #fca5a5 !important; }

/* ── Password generator ── */
[data-theme="dark"] #password-output { background: var(--bg) !important; color: var(--text) !important; }
[data-theme="dark"] .strength-row { background: var(--bg) !important; color: var(--text) !important; }
/* toggle knob stays white — intentional, don't override */

/* ── QR generator ── */
[data-theme="dark"] #qr-container { background: #fff !important; }

/* ── Markdown to HTML ── */
[data-theme="dark"] textarea { background: var(--bg) !important; color: var(--text) !important; }
[data-theme="dark"] .preview { background: var(--surface) !important; color: var(--text) !important; }
[data-theme="dark"] .preview code { background: #0f172a !important; color: #e2e8f0 !important; }

/* ── Regex: group highlight ── */
[data-theme="dark"] mark.group { background: #14532d !important; color: #bbf7d0 !important; }

/* ── Word counter stats box ── */
[data-theme="dark"] .stats-grid .stat,
[data-theme="dark"] .stat-card,
[data-theme="dark"] .stat-box { background: var(--surface) !important; color: var(--text) !important; }

/* ── JSON formatter placeholder text ── */
[data-theme="dark"] #output span[style*="color:#475569"] { color: var(--text-muted) !important; }

/* ── JSON formatter: syntax colors for dark mode ── */
[data-theme="dark"] .json-key  { color: #60a5fa !important; }
[data-theme="dark"] .json-str  { color: #86efac !important; }
[data-theme="dark"] .json-num  { color: #fbbf24 !important; }
[data-theme="dark"] .json-bool { color: #f472b6 !important; }
[data-theme="dark"] .json-null { color: #94a3b8 !important; }
[data-theme="dark"] pre { background: #0d1117 !important; color: #e2e8f0 !important; }

[data-theme="dark"] .chip.active { background: #1C4D8D; border-color: #4d8fd4; color: #fff; box-shadow: 0 0 0 2px rgba(77,143,212,.4); }