body {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.login-card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,.4);
    width: 100%;
    max-width: 420px;
    padding: 2.5rem 2rem;
}
.login-logo {
    text-align: center;
    margin-bottom: 1.5rem;
}
.login-logo .brand {
    font-size: 1.8rem;
    font-weight: 800;
    color: #2c3e50;
}
.login-logo .brand span { color: #e74c3c; }
.login-logo .subtitle {
    font-size: 0.85rem;
    color: #888;
    margin-top: 4px;
}
.form-control:focus {
    border-color: #e74c3c;
    box-shadow: 0 0 0 .2rem rgba(231,76,60,.15);
}
.btn-login {
    background: #e74c3c;
    border: none;
    color: #fff;
    font-weight: 600;
    padding: .65rem;
    border-radius: 8px;
    transition: background .2s;
}
.btn-login:hover { background: #c0392b; color: #fff; }
.input-group-text {
    background: #f8f9fa;
    border-right: none;
    color: #888;
}
.input-group .form-control { border-left: none; }
.back-link {
    text-align: center;
    margin-top: 1rem;
    font-size: .85rem;
}
.back-link a { color: #e74c3c; text-decoration: none; }
.back-link a:hover { text-decoration: underline; }