:root{--blue:#176b9f;--navy:#12354b;--sky:#eaf6fc;--ink:#20323d;--muted:#6c7c86;--line:#dbe7ed;--danger:#b63b4a;--ok:#18845a;--shadow:0 12px 30px #143e551a}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;color:var(--ink);background:#f5f9fb}a{color:inherit;text-decoration:none}.shell{display:grid;grid-template-columns:245px 1fr;min-height:100vh}.side{background:linear-gradient(180deg,var(--navy),#0d2635);color:#fff;padding:28px 18px;position:sticky;top:0;height:100vh}.brand{font-size:22px;font-weight:800;letter-spacing:.4px;margin:0 10px 4px}.brand-sub{font-size:11px;opacity:.65;margin:0 10px 25px}.nav a{display:block;padding:10px 13px;border-radius:10px;margin:2px 0;color:#cfe0e8;font-size:14px}.nav a:hover,.nav a.on{background:#ffffff1c;color:#fff}.main{min-width:0}.top{height:70px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 30px}.content{padding:28px 30px;max-width:1500px}.title{margin:0;font-size:27px;color:var(--navy)}.subtitle{color:var(--muted);margin:5px 0 22px}.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:var(--shadow)}.metric strong{display:block;font-size:28px;color:var(--navy);margin-top:8px}.metric span{font-size:12px;color:var(--muted);text-transform:uppercase}.toolbar{display:flex;gap:10px;justify-content:space-between;align-items:center;margin:18px 0}.btn,button{border:0;border-radius:9px;padding:10px 15px;font-weight:650;cursor:pointer;background:var(--blue);color:#fff}.btn.light{background:#e8f2f7;color:var(--navy)}.btn.danger{background:#fbeaec;color:var(--danger)}table{width:100%;border-collapse:collapse;background:#fff;border-radius:14px;overflow:hidden;border:1px solid var(--line)}th,td{text-align:left;padding:13px 14px;border-bottom:1px solid var(--line);font-size:14px}th{background:#f0f7fa;color:var(--navy);font-size:12px;text-transform:uppercase}tr:last-child td{border-bottom:0}.badge{display:inline-block;padding:5px 9px;border-radius:99px;background:#e7f6ef;color:var(--ok);font-size:12px}.badge.pending,.badge.overdue{background:#fff4dc;color:#8d6100}.badge.cancelled{background:#fbeaec;color:var(--danger)}form.panel{background:#fff;padding:22px;border-radius:16px;border:1px solid var(--line);max-width:900px}.fields{display:grid;grid-template-columns:1fr 1fr;gap:15px}.field{display:flex;flex-direction:column;gap:6px}.field.full{grid-column:1/-1}label{font-size:13px;font-weight:650;color:var(--navy)}input,select,textarea{width:100%;padding:11px 12px;border:1px solid #cbdce4;border-radius:9px;font:inherit;background:#fff}textarea{min-height:85px}.alert{padding:13px 15px;border-radius:10px;background:#e7f6ef;color:#126843;margin-bottom:16px}.alert.err{background:#fbeaec;color:#8d2330}.login{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#eaf6fc,#fff)}.login-card{width:min(430px,92vw);background:#fff;border-radius:22px;padding:35px;box-shadow:0 25px 60px #12354b2e}.login-card .brand{color:var(--navy);margin:0}.login-card form{display:grid;gap:15px;margin-top:25px}.empty{text-align:center;padding:35px;color:var(--muted)}@media(max-width:900px){.shell{grid-template-columns:1fr}.side{height:auto;position:static}.nav{display:flex;overflow:auto}.nav a{white-space:nowrap}.grid{grid-template-columns:1fr 1fr}.content{padding:20px 16px}.fields{grid-template-columns:1fr}.field.full{grid-column:auto}}@media(max-width:520px){.grid{grid-template-columns:1fr}.toolbar{align-items:stretch;flex-direction:column}}