* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f5f6f8;
    color: #1f2937;
}

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

.login-card {
    width: 100%;
    max-width: 420px;
    background: #ffffff;
    border-radius: 16px;
    padding: 36px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.login-brand {
    text-align: center;
    margin-bottom: 32px;
}

.login-brand h1 {
    margin: 0 0 6px;
    font-size: 28px;
}

.login-brand p {
    margin: 0;
    color: #6b7280;
    font-size: 15px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 600;
}

.form-group input {
    width: 100%;
    padding: 13px 14px;
    border: 1px solid #d1d5db;
    border-radius: 10px;
    font-size: 15px;
    outline: none;
}

.form-group input:focus {
    border-color: #111827;
}

#loginButton {
    width: 100%;
    border: none;
    border-radius: 10px;
    padding: 14px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    background: #111827;
    color: #ffffff;
}

#loginButton:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.login-message {
    display: none;
    margin-bottom: 18px;
    padding: 12px 14px;
    border-radius: 8px;
    font-size: 14px;
}

.login-message.error {
    display: block;
    background: #fee2e2;
    color: #991b1b;
}

.login-message.success {
    display: block;
    background: #dcfce7;
    color: #166534;
}