:root {
  --bg: #0b0e14;
  --bg-elevated: #131826;
  --bg-input: #0e1420;
  --border: #232b3d;
  --text: #e7ebf3;
  --text-muted: #8b93a7;
  --accent: #3ddc97;
  --accent-dim: #2a9d6f;
  --danger: #ef5f6d;
  --warn: #f5b942;
  --link: #6fb1ff;
  --radius: 10px;
  --max-width: 780px;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { color-scheme: dark; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px 64px;
}

header.site {
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  padding-bottom: 20px;
}

.logo {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.logo span { color: var(--accent); }

nav.top a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  margin-left: 18px;
}
nav.top a:hover { color: var(--text); }

h1 {
  font-size: 1.7rem;
  line-height: 1.25;
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 1.15rem;
  margin: 36px 0 12px;
  color: var(--text);
}

p.lead {
  color: var(--text-muted);
  font-size: 1.02rem;
  margin: 0 0 28px;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.field input,
.field select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 11px 12px;
  font-size: 1rem;
  font-family: inherit;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--accent-dim);
}

.row2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
@media (max-width: 520px) {
  .row2 { grid-template-columns: 1fr; }
}

.result {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px;
  margin-top: 6px;
}

.result .big {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.01em;
}

.result .big.danger { color: var(--danger); }
.result .big.warn { color: var(--warn); }

.result-row {
  display: flex;
  justify-content: space-between;
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}
.result-row:last-child { border-bottom: none; }
.result-row .k { color: var(--text-muted); }
.result-row .v { font-weight: 600; }

.hint {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 8px;
}

.warning-box {
  background: rgba(245, 185, 66, 0.08);
  border: 1px solid rgba(245, 185, 66, 0.35);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 0.85rem;
  color: #f5d18a;
  margin-top: 14px;
}

.toggle-group {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}
.toggle-group button {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 9px;
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  font-family: inherit;
}
.toggle-group button.active {
  background: rgba(61, 220, 151, 0.12);
  border-color: var(--accent-dim);
  color: var(--accent);
}

.btn-primary {
  background: var(--accent);
  color: #05130c;
  font-weight: 700;
  border: none;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 0.95rem;
  cursor: pointer;
  font-family: inherit;
  width: 100%;
  margin-top: 4px;
}
.btn-primary:disabled { opacity: 0.55; cursor: not-allowed; }

.spinner-hint {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.88rem;
  padding: 10px 0;
}

.cta-box {
  background: linear-gradient(135deg, rgba(61,220,151,0.10), rgba(61,220,151,0.02));
  border: 1px solid rgba(61,220,151,0.25);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin: 36px 0;
}
.cta-box p { margin: 0 0 12px; color: var(--text); font-size: 0.95rem; }
.cta-box a.btn {
  display: inline-block;
  background: var(--accent);
  color: #05130c;
  font-weight: 700;
  text-decoration: none;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 0.92rem;
}

.tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 24px 0 8px;
}
@media (max-width: 560px) {
  .tools-grid { grid-template-columns: 1fr; }
}
.tool-card {
  display: block;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-decoration: none;
  color: var(--text);
}
.tool-card:hover { border-color: var(--accent-dim); }
.tool-card .emoji { font-size: 1.4rem; }
.tool-card h3 { margin: 8px 0 4px; font-size: 1rem; }
.tool-card p { margin: 0; color: var(--text-muted); font-size: 0.85rem; }

article.content {
  color: var(--text-muted);
  font-size: 0.95rem;
}
article.content p { margin: 0 0 14px; }
article.content ul { padding-left: 20px; }
article.content li { margin-bottom: 6px; }
.related-list {
  list-style: none;
  padding: 0;
  margin: 0 0 8px;
}
.related-list li {
  border-bottom: 1px solid var(--border);
}
.related-list li:last-child { border-bottom: none; }
.related-list a {
  display: block;
  padding: 12px 0;
  color: var(--link);
  text-decoration: none;
  font-size: 0.95rem;
}
.related-list a:hover { text-decoration: underline; }

article.content code {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.88em;
  color: var(--text);
}

.legal-links {
  margin-top: 8px;
  font-size: 0.82rem;
}
.legal-links a { margin-right: 4px; }

.affiliate-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin: 8px 0 0;
}

.placeholder {
  background: rgba(239, 95, 109, 0.15);
  color: var(--danger);
  padding: 1px 5px;
  border-radius: 4px;
  font-weight: 600;
}

footer.site {
  border-top: 1px solid var(--border);
  margin-top: 48px;
  padding-top: 24px;
  color: var(--text-muted);
  font-size: 0.82rem;
}
footer.site a { color: var(--text-muted); }
footer.site .disclaimer { margin-top: 10px; line-height: 1.6; }