:root { color-scheme: dark; --bg: #05080c; --panel: #0b1118; --panel-2: #101924; --text: #f2f4f7; --muted: #9aa5b1; --line: #263241; --accent: #ff4d16; --accent-2: #d7dce2; }
* { box-sizing: border-box; }
html { background: var(--bg); }
body { margin: 0; min-height: 100vh; color: var(--text); background: radial-gradient(circle at 78% 18%, rgba(255, 77, 22, 0.14), transparent 32rem), var(--bg); font-family: Arial, Helvetica, sans-serif; line-height: 1.55; }
a { color: inherit; }
.seo-header { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 0.85rem clamp(1rem, 3vw, 2.5rem); border-bottom: 1px solid var(--line); background: rgba(5, 8, 12, 0.92); backdrop-filter: blur(12px); }
.seo-brand { display: flex; align-items: center; gap: 0.75rem; text-decoration: none; font-weight: 800; letter-spacing: 0.04em; text-transform: uppercase; }
.seo-brand img { width: 3rem; height: 3rem; object-fit: cover; border-radius: 0.35rem; }
.seo-header nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 0.35rem; }
.seo-header nav a, .open-app a { display: inline-flex; align-items: center; min-height: 2.35rem; padding: 0.55rem 0.75rem; border: 1px solid var(--line); text-decoration: none; text-transform: uppercase; font-size: 0.78rem; letter-spacing: 0.08em; background: rgba(16, 25, 36, 0.86); }
.seo-header nav a:hover, .open-app a:hover, .seo-card a:hover, .seo-link-grid a:hover { border-color: var(--accent); color: #fff; }
.seo-main { width: min(1120px, calc(100% - 2rem)); margin: 0 auto; padding: clamp(1.5rem, 4vw, 4rem) 0; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 0.45rem; color: var(--muted); font-size: 0.82rem; margin-bottom: 1.25rem; }
.breadcrumbs a { text-decoration: none; }
.seo-article { display: grid; gap: 1.25rem; }
.kicker { margin: 0; color: var(--accent); text-transform: uppercase; letter-spacing: 0.14em; font-size: 0.78rem; font-weight: 800; }
h1 { margin: 0; max-width: 15ch; font-size: clamp(2.4rem, 6vw, 5rem); line-height: 0.92; text-transform: uppercase; letter-spacing: 0; }
h2 { margin: 0 0 0.8rem; font-size: clamp(1.35rem, 2.6vw, 2rem); line-height: 1.1; text-transform: uppercase; letter-spacing: 0.04em; }
h3 { margin: 0 0 0.45rem; font-size: 1rem; text-transform: uppercase; letter-spacing: 0.03em; }
p { margin: 0 0 0.85rem; }
.lede { max-width: 78ch; color: var(--accent-2); font-size: clamp(1.05rem, 1.6vw, 1.3rem); }
.seo-section { padding: clamp(1rem, 2vw, 1.35rem); border: 1px solid var(--line); background: rgba(11, 17, 24, 0.86); }
.seo-section ul { margin: 0.6rem 0 0; padding-left: 1.2rem; color: var(--accent-2); }
.seo-card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0.75rem; }
.seo-card { min-height: 10rem; padding: 1rem; border: 1px solid var(--line); background: var(--panel-2); }
.seo-card a { text-decoration: none; color: #fff; }
.seo-card p { color: var(--muted); }
.seo-link-grid { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.seo-link-grid a, .keyword-cloud span { display: inline-flex; padding: 0.42rem 0.6rem; border: 1px solid var(--line); color: var(--accent-2); text-decoration: none; background: rgba(5, 8, 12, 0.55); }
.keyword-cloud { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 0; }
.seo-footer { width: min(1120px, calc(100% - 2rem)); margin: 0 auto; padding: 1.5rem 0 3rem; color: var(--muted); border-top: 1px solid var(--line); }
.seo-footer a { color: var(--accent-2); }
@media (max-width: 760px) {
  .seo-header { position: static; align-items: flex-start; flex-direction: column; }
  .seo-header nav { justify-content: flex-start; }
  .seo-brand img { width: 2.5rem; height: 2.5rem; }
}