:root, html[data-theme="dark"] {
  --bg: #0B0B12;
  --surface: #16161F;
  --text: #F5F5F7;
  --text-2: #B8C2D0;
  --text-3: #6E7A8A;
  --border: rgba(255,255,255,0.08);
  --grad: linear-gradient(90deg, #4E7BFF, #8A5CF6);
  color-scheme: dark;
}
html[data-theme="light"] {
  --bg: #F4F5F8;
  --surface: #E8E9EE;
  --text: #0B0B12;
  --text-2: #3A4152;
  --text-3: #6E7A8A;
  --border: rgba(11,11,18,0.10);
  color-scheme: light;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  font-family: 'Space Grotesk', 'Inter', -apple-system, 'SF Pro Text', 'Helvetica Neue', Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--text); }
.container { max-width: 760px; margin: 0 auto; padding: 0 24px; }
.nav {
  position: sticky; top: 0; z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}
.nav-inner {
  display: flex; justify-content: space-between; align-items: center;
}
.brand {
  display: inline-flex;
  align-items: center;
  line-height: 0;
  text-decoration: none;
}
.brand-logo {
  height: 26px;
  width: auto;
  display: block;
}
html[data-theme="dark"] .brand-logo-light { display: none; }
html[data-theme="light"] .brand-logo-dark { display: none; }
.grad-dot {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  background: var(--grad);
  margin-left: 3px;
  vertical-align: baseline;
}
.back-link {
  font-size: 13px; color: var(--text-3);
  text-decoration: none;
  font-weight: 500; letter-spacing: 1px; text-transform: uppercase;
  transition: color .15s ease;
}
.back-link:hover { color: var(--text); }

main { padding: clamp(36px, 5vw, 60px) 0 80px; }
.meta {
  font-size: 12px; font-weight: 500; letter-spacing: 2.5px;
  text-transform: uppercase; color: var(--text-3);
  margin-bottom: 12px;
}
h1 {
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 300;
  letter-spacing: -1px;
  line-height: 1.1;
  margin-bottom: 14px;
}
.lead {
  font-size: 15px; color: var(--text-2);
  margin-bottom: 28px;
}
h2 {
  font-size: 20px; font-weight: 500;
  margin-top: 36px; margin-bottom: 14px;
  color: var(--text);
  letter-spacing: -0.2px;
}
h3 {
  font-size: 16px; font-weight: 500;
  margin-top: 22px; margin-bottom: 10px;
}
p { font-size: 15px; color: var(--text-2); margin-bottom: 12px; }
ul, ol { padding-left: 22px; margin-bottom: 14px; }
li { font-size: 15px; color: var(--text-2); margin-bottom: 6px; }
strong, b { color: var(--text); font-weight: 500; }
hr {
  border: 0;
  height: 1px;
  background: var(--border);
  margin: 32px 0;
}
.req {
  background: var(--surface);
  border-radius: 12px;
  padding: 18px 22px;
  font-size: 14px;
  color: var(--text-2);
  margin: 18px 0;
  line-height: 1.7;
}
.req b { color: var(--text); }

footer {
  padding: 30px 0;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-3);
}
footer .container {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
footer a { color: inherit; text-decoration: underline; text-decoration-color: var(--border); }