:root{color-scheme:light dark}body{margin:0;font:16px/1.5 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif}.container{max-width:860px;margin:0 auto;padding:0 16px}.site-header{position:sticky;top:0;backdrop-filter:blur(16px);background:rgba(255,255,255,0.7);border-bottom:1px solid rgba(0,0,0,0.08)}@media (prefers-color-scheme: dark){.site-header{background:rgba(0,0,0,0.5);border-bottom:1px solid rgba(255,255,255,0.12)}}.header-inner{display:flex;align-items:center;justify-content:space-between;height:56px}.brand{text-decoration:none;font-weight:700;color:inherit}.nav a{text-decoration:none;margin-left:14px;color:inherit;opacity:0.85}.nav a:hover{opacity:1}.content{padding:28px 0 56px}p,li{opacity:0.92}.card{border:1px solid rgba(0,0,0,0.08);border-radius:14px;padding:16px;background:rgba(255,255,255,0.55)}@media (prefers-color-scheme: dark){.card{border-color:rgba(255,255,255,0.12);background:rgba(0,0,0,0.35)}}label{display:block;font-weight:600;margin:12px 0 6px}input,textarea{width:100%;box-sizing:border-box;padding:10px 12px;border-radius:12px;border:1px solid rgba(0,0,0,0.15);background:transparent;color:inherit}textarea{min-height:140px}button{margin-top:14px;padding:10px 14px;border-radius:12px;border:0;font-weight:700;cursor:pointer}button.primary{background:#0a84ff;color:white}.hint{font-size:13px;opacity:0.75}.site-footer{border-top:1px solid rgba(0,0,0,0.08);padding:18px 0;opacity:0.75}@media (prefers-color-scheme: dark){.site-footer{border-top-color:rgba(255,255,255,0.12)}}