/* Documentation Theme */
:root{
  --bg-grad-start:#667eea; --bg-grad-end:#764ba2;
  --brand:#009688; --brand-2:#00bcd4; --text:#333; --muted:#666;
  --card:#ffffff; --card-alt:#f8f9fa; --code-bg:#2d2d2d; --code-fg:#f8f8f2;
  --warn:#fff3cd; --warn-accent:#ffc107; --info:#d1ecf1; --info-accent:#17a2b8; --ok:#d4edda; --ok-accent:#28a745;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(135deg,var(--bg-grad-start) 0%,var(--bg-grad-end) 100%);color:var(--text);line-height:1.6}
.container{max-width:980px;margin:20px auto;background:var(--card);border-radius:16px;box-shadow:0 20px 60px rgba(0,0,0,.25);overflow:hidden}
.header{background:linear-gradient(135deg,var(--brand) 0%,var(--brand-2) 100%);color:#fff;padding:28px 24px}
.header h1{margin:0 0 6px 0;font-size:28px}
.header p{margin:0;opacity:.9}
.navbar{display:flex;gap:16px;flex-wrap:wrap;margin-top:10px}
.navbar a{color:#fff;text-decoration:none;border:1px solid rgba(255,255,255,.35);padding:8px 12px;border-radius:8px;backdrop-filter:blur(2px)}
.navbar a:hover{background:rgba(255,255,255,.12)}
.content{padding:28px}
.section{margin-bottom:32px}
.section h2{display:flex;align-items:center;gap:8px;color:var(--brand);font-size:22px;margin:0 0 10px;border-bottom:3px solid var(--brand-2);padding-bottom:8px}
.section h3{color:#555;font-size:18px;margin:22px 0 12px}
.icon{width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center}
.step{background:var(--card-alt);padding:16px;margin:12px 0;border-radius:10px;border-left:4px solid var(--brand);transition:transform .2s,box-shadow .2s}
.step:hover{transform:translateX(3px);box-shadow:0 5px 15px rgba(0,0,0,.08)}
.step-number{display:inline-block;background:var(--brand);color:#fff;width:28px;height:28px;border-radius:50%;text-align:center;line-height:28px;margin-right:8px;font-weight:600}
.code-block{background:var(--code-bg);color:var(--code-fg);padding:16px;border-radius:10px;overflow:auto;margin:12px 0;font-family:'Courier New',monospace}
code{background:var(--code-bg);color:var(--code-fg);padding:2px 6px;border-radius:4px;font-family:'Courier New',monospace}
.warning{background:var(--warn);border-left:4px solid var(--warn-accent);padding:12px;border-radius:8px;margin:12px 0}
.info{background:var(--info);border-left:4px solid var(--info-accent);padding:12px;border-radius:8px;margin:12px 0}
.success{background:var(--ok);border-left:4px solid var(--ok-accent);padding:12px;border-radius:8px;margin:12px 0}
.footer{background:#f8f9fa;color:var(--muted);padding:18px;text-align:center;border-top:3px solid #e9ecef}
.quick-links{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:16px 0}
.card-link{display:block;background:#fff;border:1px solid #eee;border-radius:10px;padding:16px;text-decoration:none;color:inherit}
.card-link:hover{border-color:#ddd;box-shadow:0 6px 18px rgba(0,0,0,.08)}
.os-tabs{display:flex;gap:10px;margin-bottom:16px;flex-wrap:wrap}
.os-tab{padding:8px 12px;background:#e9ecef;border-radius:6px;cursor:pointer}
.os-tab.active{background:var(--brand);color:#fff}
.os-content{display:none}
.os-content.active{display:block}
.hero{padding:10px 0 0}
.hero h2{margin:8px 0 4px}
.badge{display:inline-block;background:#e9ecef;color:#333;border-radius:999px;padding:4px 10px;font-size:12px;border:1px solid #dcdcdc}