:root{--nav:#121212;--bg:#f5f6f8;--card:#fff;--line:#e1e4e8;--text:#17191c;--muted:#6b7280;--accent:#111827;--danger:#a61b1b}
*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;background:var(--bg);color:var(--text)}
.shell{display:grid;grid-template-columns:235px 1fr;min-height:100vh}.sidebar{background:var(--nav);color:#fff;padding:24px 18px;position:sticky;top:0;height:100vh}
.brand{font-size:21px;font-weight:800;margin-bottom:28px}.brand span{font-weight:400;color:#aaa}.sidebar nav{display:grid;gap:5px}.sidebar a{color:#ddd;text-decoration:none;padding:11px 12px;border-radius:8px}.sidebar a:hover{background:#272727;color:#fff}
.main{padding:28px;max-width:1500px;width:100%}.mobile-head{display:none}.page-head{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:20px}
h1,h2,h3{margin-top:0}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px;margin-bottom:18px;box-shadow:0 1px 2px rgba(0,0,0,.03)}
.metric{font-size:31px;font-weight:800;margin-top:7px}.muted{color:var(--muted)}.badge{display:inline-block;background:#edf0f3;padding:4px 8px;border-radius:999px;font-size:12px}
table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:11px 10px;border-bottom:1px solid var(--line);vertical-align:top}th{font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
a{color:#174f7e}.btn,button{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;border:0;padding:10px 14px;border-radius:8px;cursor:pointer;font:inherit}.btn.secondary{background:#e9edf1;color:#111}
input,select,textarea{width:100%;padding:11px 12px;border:1px solid #ccd2d8;border-radius:8px;font:inherit;background:#fff}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.form-grid .wide{grid-column:1/-1}
.search{display:grid;grid-template-columns:1fr 130px;gap:10px}.alert{padding:11px 13px;border-radius:8px;margin-bottom:14px}.alert.error{background:#fee2e2;color:#7f1d1d}.alert.ok{background:#dcfce7;color:#14532d}
.login{max-width:430px;margin:70px auto}.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:15px}
@media(max-width:820px){.shell{display:block}.sidebar{height:auto;position:static;padding:12px}.brand{margin-bottom:10px}.sidebar nav{display:flex;overflow:auto}.sidebar a{white-space:nowrap}.main{padding:14px}.form-grid{grid-template-columns:1fr}.search{grid-template-columns:1fr}.page-head{align-items:flex-start;flex-direction:column}}