:root{
    --red:#c8102e;
    --red-dark:#970b22;
    --ink:#24242a;
    --muted:#6b7280;
    --bg:#f5f6f8;
    --card:#ffffff;
    --line:#e5e7eb;
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--ink)}
a{color:inherit;text-decoration:none}.auth-body{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#8f0c1f,#d7193f 45%,#ffffff)}
.auth-wrapper{width:min(420px,92vw)}.login-card{background:#fff;border-radius:24px;padding:34px;box-shadow:0 25px 80px rgba(0,0,0,.25)}
.login-header{text-align:center;margin-bottom:24px}.logo-mark{display:inline-grid;place-items:center;width:84px;height:84px;border-radius:20px;background:var(--red);color:#fff;font-weight:900;font-size:22px;letter-spacing:.5px;margin-bottom:14px}.login-header h1{margin:0 0 6px}.login-header p{margin:0;color:var(--muted)}
label{display:block;font-weight:700;margin:16px 0 7px}input{width:100%;border:1px solid var(--line);border-radius:12px;padding:13px 14px;font-size:16px}button{width:100%;border:0;border-radius:14px;background:var(--red);color:white;padding:14px 16px;font-weight:800;font-size:16px;margin-top:22px;cursor:pointer}button:hover{background:var(--red-dark)}
.alert{padding:12px 14px;border-radius:12px;margin:12px 0;font-weight:700}.alert-danger{background:#fee2e2;color:#991b1b}.alert-success{background:#dcfce7;color:#166534}.app-shell{min-height:100vh;display:flex}.sidebar{width:270px;background:#16161c;color:#fff;padding:24px;display:flex;flex-direction:column;gap:28px}.brand strong{display:block;font-size:28px;letter-spacing:1px}.brand span{color:#d1d5db}.nav{display:flex;flex-direction:column;gap:8px}.nav a{padding:12px 14px;border-radius:12px;color:#e5e7eb}.nav a:hover,.nav a.active{background:var(--red);color:#fff}.main-area{flex:1;min-width:0}.topbar{height:72px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 28px}.userbox{display:flex;gap:16px;align-items:center}.userbox a{color:var(--red);font-weight:800}.content{padding:28px}.welcome-card,.stat-card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:0 8px 30px rgba(15,23,42,.04)}.welcome-card h1{margin:0 0 8px}.welcome-card p{margin:0;color:var(--muted)}.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-top:22px}.stat-card span{display:block;color:var(--muted);font-weight:700}.stat-card strong{display:block;font-size:38px;margin-top:8px;color:var(--red)}
@media(max-width:900px){.app-shell{display:block}.sidebar{width:auto}.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.topbar{height:auto;padding:18px;gap:10px;align-items:flex-start;flex-direction:column}}@media(max-width:520px){.stats-grid{grid-template-columns:1fr}.login-card{padding:24px}}