:root{--bg:#f4f7fb;--card:#fff;--text:#172033;--muted:#68758c;--line:#dce5f0;--primary:#2f6fed;--primary-2:#2158c9;--danger:#cf3f4f;--success:#198754;--shadow:0 10px 30px rgba(23,32,51,.08)}
*{box-sizing:border-box}body{margin:0;font-family:Inter,Arial,sans-serif;background:var(--bg);color:var(--text)}a{color:var(--primary);text-decoration:none}.shell{display:flex;min-height:100vh}.sidebar{width:260px;background:#fff;border-right:1px solid var(--line);padding:24px;position:sticky;top:0;height:100vh}.brand{font-size:24px;font-weight:700;margin-bottom:24px}.nav-link{display:block;padding:12px 14px;border-radius:12px;color:var(--text);margin-bottom:8px}.nav-link.active,.nav-link:hover{background:#eef4ff;color:var(--primary)}.main{flex:1;padding:28px}.main-auth{display:flex;align-items:center;justify-content:center}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:var(--shadow)}.auth-card{width:100%;max-width:420px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:28px;box-shadow:var(--shadow)}.stack>*+*{margin-top:14px}.page-head{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:18px}.muted,.hint{color:var(--muted)}label{display:block;font-size:14px;font-weight:600}input,select,textarea,button{font:inherit}input,select,textarea{width:100%;margin-top:6px;border:1px solid #c8d4e3;border-radius:12px;padding:12px 14px;background:#fff;color:var(--text)}textarea{resize:vertical}.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);padding:12px 18px;border-radius:12px;background:#fff;cursor:pointer}.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn.primary:hover{background:var(--primary-2)}.alert{padding:14px 16px;border-radius:14px;margin-bottom:18px}.alert.success{background:#eaf8f1;color:#16653f;border:1px solid #b9e4cb}.alert.error{background:#fff0f2;color:#9f2235;border:1px solid #f2bcc6}.stats-grid,.grid-2,.grid-3{display:grid;gap:18px}.stats-grid{grid-template-columns:repeat(4,1fr);margin-bottom:18px}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.stat-value{font-size:34px;font-weight:800}.danger{color:var(--danger)}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:12px;border-bottom:1px solid var(--line);vertical-align:top}th{font-size:13px;color:var(--muted)}.badge{display:inline-flex;padding:6px 10px;border-radius:999px;font-size:12px;font-weight:700;text-transform:uppercase}.badge.open{background:#e9f2ff;color:#255fd8}.badge.in_progress{background:#fff6dd;color:#8d6a00}.badge.closed{background:#eaf8f1;color:#16653f}.list-item{padding:12px 0;border-bottom:1px solid var(--line)}.detail-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.notice{padding:14px;border-radius:14px;background:#f6faff;border:1px solid #d9e6ff}.upload-box{border:1px dashed #bfd0e7;border-radius:16px;padding:16px;background:#fbfdff}.upload-result{margin-top:10px}.upload-chip{display:inline-flex;gap:8px;align-items:center;padding:8px 10px;background:#eef4ff;border-radius:999px;margin:6px 6px 0 0}.mt-16{margin-top:16px}code{background:#f2f6fb;padding:2px 6px;border-radius:8px}
@media (max-width:1200px){.stats-grid{grid-template-columns:repeat(2,1fr)}.grid-2,.grid-3{grid-template-columns:1fr}.sidebar{width:220px}}@media (max-width:860px){.shell{display:block}.sidebar{position:static;height:auto;width:auto}.main{padding:16px}.stats-grid{grid-template-columns:1fr}}