* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    min-height: 100vh;
    background: linear-gradient(135deg, #0f172a, #1e3a8a, #2563eb);
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: #ffffff;
    border-radius: 18px;
    padding: 40px 30px;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.25);
}

.login-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: #2563eb;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 32px;
}

.login-card h1 {
    text-align: center;
    font-size: 28px;
    color: #0f172a;
    margin-bottom: 8px;
}

.login-card p.subtitle {
    text-align: center;
    color: #64748b;
    margin-bottom: 28px;
    font-size: 14px;
}

.login-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
    padding: 12px;
    border-radius: 10px;
    margin-bottom: 18px;
    text-align: center;
    font-size: 14px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #1e293b;
    font-size: 14px;
    font-weight: bold;
}

.form-group input {
    width: 100%;
    height: 48px;
    border: 1px solid #cbd5e1;
    border-radius: 10px;
    padding: 0 14px;
    font-size: 15px;
    outline: none;
    transition: 0.2s ease;
    background: #f8fafc;
}

.form-group input:focus {
    border-color: #2563eb;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.btn-login {
    width: 100%;
    height: 50px;
    border: none;
    border-radius: 10px;
    background: #2563eb;
    color: #fff;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.2s ease;
}

.btn-login:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
}

.login-footer {
    text-align: center;
    margin-top: 22px;
    font-size: 13px;
    color: #64748b;
}

@media (max-width: 480px) {
    .login-card {
        padding: 30px 20px;
        border-radius: 14px;
    }

    .login-card h1 {
        font-size: 24px;
    }
}