:root{--bg:#f4f6f8;--card:#fff;--line:#d8dee6;--text:#1f2937;--muted:#6b7280;--accent:#2563eb;}
*{box-sizing:border-box} body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;font-size:14px} 
header{height:58px;background:#111827;color:white;display:flex;align-items:center;justify-content:space-between;padding:0 22px;box-shadow:0 2px 10px rgba(0,0,0,.18)}
.brand{font-size:18px;font-weight:700} nav a{color:white;text-decoration:none;margin-left:18px;opacity:.9} nav a:hover{opacity:1;text-decoration:underline}
main{max-width:1280px;margin:24px auto;padding:0 18px}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px;margin-bottom:18px;box-shadow:0 1px 3px rgba(0,0,0,.04)}
h1{margin:0 0 14px;font-size:24px} h2{margin:0 0 12px;font-size:18px}.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:10px}
input,select,button,.btn{border:1px solid var(--line);border-radius:8px;padding:9px 10px;background:#fff;color:var(--text)}button,.btn{background:var(--accent);border-color:var(--accent);color:#fff;text-decoration:none;cursor:pointer}button:hover,.btn:hover{filter:brightness(.95)}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:10px} table{border-collapse:collapse;width:100%;background:white} th,td{border-bottom:1px solid var(--line);padding:9px;vertical-align:top;text-align:left} th{background:#f9fafb;position:sticky;top:0;z-index:1} tr:hover td{background:#f8fafc} textarea{width:360px;height:110px;font-family:inherit;font-size:13px;border:1px solid var(--line);border-radius:8px;padding:8px}.center{text-align:center}.matrix th,.matrix td{font-size:12px;white-space:nowrap}
.flash{padding:10px 12px;border-radius:8px;margin-bottom:12px}.flash.ok{background:#ecfdf5;border:1px solid #a7f3d0}.flash.error{background:#fef2f2;border:1px solid #fecaca}
.login-page{min-height:100vh;display:grid;place-items:center}.login-card{width:360px;background:white;border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:0 8px 24px rgba(0,0,0,.12)}.login-card h1{font-size:22px}.login-card label{display:block;margin:12px 0 6px}.login-card input,.login-card button{width:100%;margin-top:6px}