* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f4f6f9;
    color: #1f2937;
}
.login-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
}
.login-card {
    width: min(400px, 92%);
    background: #fff;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0,0,0,.08);
}
.login-card h1 { margin: 0 0 8px; }
.muted { color: #6b7280; }
label {
    display: block;
    margin: 18px 0 7px;
    font-weight: 600;
}
input {
    width: 100%;
    padding: 12px;
    border: 1px solid #d1d5db;
    border-radius: 7px;
}
button {
    width: 100%;
    margin-top: 22px;
    padding: 12px;
    border: 0;
    border-radius: 7px;
    background: #111827;
    color: #fff;
    cursor: pointer;
}
.alert {
    padding: 10px;
    background: #fee2e2;
    color: #991b1b;
    border-radius: 7px;
}
.topbar {
    background: #111827;
    color: #fff;
    padding: 16px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.topbar nav {
    display: flex;
    gap: 18px;
    align-items: center;
}
.topbar a { color: #fff; text-decoration: none; }
.logout { font-weight: 700; }
.container { width: min(1100px, 92%); margin: 35px auto; }
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
    margin-top: 25px;
}
.card {
    display: block;
    padding: 24px;
    background: #fff;
    border-radius: 10px;
    text-decoration: none;
    color: #111827;
    box-shadow: 0 4px 18px rgba(0,0,0,.06);
}
.role-box {
    margin-top: 25px;
    padding: 18px;
    background: #fff;
    border-radius: 10px;
}