body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f3f5f9;
    color: #1f2937;
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-card {
    width: 100%;
    max-width: 390px;
    background: white;
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,.08);
}

.login-card h1 {
    margin: 0;
    font-size: 28px;
}

.login-card p {
    margin: 8px 0 24px;
    color: #6b7280;
}

label {
    display: block;
    margin-top: 16px;
    font-weight: bold;
}

input {
    width: 100%;
    padding: 12px;
    margin-top: 6px;
    border: 1px solid #d1d5db;
    border-radius: 10px;
    box-sizing: border-box;
}

button {
    width: 100%;
    margin-top: 22px;
    padding: 12px;
    border: 0;
    border-radius: 10px;
    background: #1f2937;
    color: white;
    font-weight: bold;
    cursor: pointer;
}

.alert {
    background: #fee2e2;
    color: #991b1b;
    padding: 12px;
    border-radius: 10px;
    margin-bottom: 16px;
}

.panel {
    max-width: 720px;
    margin: 60px auto;
    background: white;
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,.08);
}