:root {
  --bg: #0b0d16;
  --panel: #141829;
  --panel-2: #1b2035;
  --border: #2a2f4a;
  --text: #f1f3fb;
  --text-dim: #9aa0c3;
  --purple: #7c6cff;
  --purple-2: #9b8cff;
  --cyan: #38bdf8;
  --cyan-2: #7dd3fc;
  --radius: 16px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(900px 420px at 10% -10%, rgba(124, 108, 255, 0.12), transparent 60%),
    radial-gradient(800px 400px at 100% 0%, rgba(56, 189, 248, 0.1), transparent 55%),
    linear-gradient(180deg, #0b0d16 0%, #0e1120 60%, #0b0d16 100%);
  color: var(--text);
  min-height: 100vh;
}

.page {
  max-width: 860px;
  margin: 0 auto;
  padding: 32px 20px 64px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.brand-logo {
  height: 34px;
  width: auto;
  display: block;
  background: #fff;
  border-radius: 8px;
  padding: 4px 8px;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.site-nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 7px 12px;
  border-radius: 999px;
  white-space: nowrap;
}

.site-nav a:hover { color: var(--text); background: var(--panel-2); }

.site-nav a.active {
  color: white;
  background: linear-gradient(135deg, var(--purple), var(--purple-2));
}

.page-head h1 {
  margin: 0 0 8px;
  font-size: clamp(1.7rem, 3.4vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  background: linear-gradient(135deg, #ffffff 20%, var(--purple-2) 65%, var(--cyan-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-head p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.98rem;
  max-width: 620px;
  line-height: 1.6;
}

.article-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.article-card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px clamp(18px, 3vw, 28px);
  text-decoration: none;
  transition: border-color 0.15s ease;
}

.article-card:hover { border-color: var(--purple); }

.article-card .tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--cyan-2);
  margin-bottom: 8px;
}

.article-card h2 {
  margin: 0 0 6px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
}

.article-card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.88rem;
  line-height: 1.6;
}

.doc {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px clamp(20px, 4vw, 48px);
}

.doc .back-link {
  display: inline-block;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 18px;
}

.doc .back-link:hover { color: var(--text); }

.doc h1 {
  margin: 0 0 6px;
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.doc .updated {
  margin: 0 0 28px;
  color: var(--text-dim);
  font-size: 0.82rem;
}

.doc h2 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 30px 0 10px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.doc h2:first-of-type { border-top: none; padding-top: 0; margin-top: 8px; }

.doc p, .doc li {
  color: #d7dbee;
  font-size: 0.94rem;
  line-height: 1.7;
}

.doc ul, .doc ol { margin: 10px 0; padding-left: 22px; }
.doc li { margin-bottom: 6px; }
.doc a { color: var(--cyan-2); }
.doc strong { color: var(--text); }

.tool-cta-row {
  margin-top: 8px;
}

.tool-cta-row a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  border-radius: 999px;
  padding: 11px 20px;
  font-size: 0.88rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--purple), var(--cyan));
  color: white;
}

.page-footer {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.78rem;
}

.legal-links {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 14px;
}

.legal-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.76rem;
}

.legal-links a:hover {
  color: var(--text);
  text-decoration: underline;
}

.tool-group {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.tool-group h2 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

.tool-card-mini {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-decoration: none;
  transition: border-color 0.15s ease, transform 0.1s ease;
}

.tool-card-mini:hover { border-color: var(--purple); transform: translateY(-2px); }

.tool-card-mini .icon { font-size: 1.6rem; }

.tool-card-mini h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.tool-card-mini p {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.5;
}

/* --- Theme toggle button --- */
.site-header { flex-wrap: wrap; }
.site-nav { flex: 1 1 auto; justify-content: flex-end; }

.theme-toggle {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
  padding: 0;
  margin-left: 8px;
}
.theme-toggle:hover { border-color: var(--purple); }

/* --- Light mode --- */
:root[data-theme="light"] {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --panel-2: #eef0f8;
  --border: #dbdfee;
  --text: #181b2c;
  --text-dim: #5a5f78;
}

:root[data-theme="light"] body {
  background:
    radial-gradient(1100px 520px at 15% -10%, rgba(124, 108, 255, 0.08), transparent 60%),
    radial-gradient(900px 460px at 100% 0%, rgba(56, 189, 248, 0.07), transparent 55%),
    linear-gradient(180deg, #f6f7fb 0%, #eef0f8 60%, #f6f7fb 100%);
}

:root[data-theme="light"] .hero h1,
:root[data-theme="light"] .page-head h1 {
  background: linear-gradient(135deg, #181b2c 20%, var(--purple) 65%, var(--cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

:root[data-theme="light"] .content-block p,
:root[data-theme="light"] .doc p,
:root[data-theme="light"] .doc li,
:root[data-theme="light"] .article-card p,
:root[data-theme="light"] .faq-item p,
:root[data-theme="light"] .offer-card p,
:root[data-theme="light"] .contact-card p {
  color: #3a3f57;
}

:root[data-theme="light"] .checkerboard,
:root[data-theme="light"] .ba-frame {
  background-image:
    linear-gradient(45deg, #dfe2ee 25%, transparent 25%),
    linear-gradient(-45deg, #dfe2ee 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #dfe2ee 75%),
    linear-gradient(-45deg, transparent 75%, #dfe2ee 75%);
  background-color: #eef0f8;
}

:root[data-theme="light"] .placeholder {
  color: #a5760a;
}

/* --- Keep the theme toggle next to the brand on narrow screens, instead
   of stranding it alone below a wrapped nav --- */
@media (max-width: 640px) {
  .site-brand { order: 1; }
  .theme-toggle { order: 2; margin-left: auto; }
  .site-nav {
    order: 3;
    flex-basis: 100%;
    justify-content: flex-start;
  }
}