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

:root {
    --login-accent-1: #667eea;
    --login-accent-2: #764ba2;
    --login-surface: #ffffff;
    --login-text: #333333;
    --login-label: #555555;
    --login-border: #e1e1e1;
    --login-secondary-bg: #f8f9fa;
    --login-secondary-hover: #e9ecef;

    --login-error-bg: #f8d7da;
    --login-error-text: #721c24;
    --login-error-border: #f5c6cb;

    --login-primary-shadow: rgba(102, 126, 234, 0.4);
    --login-btn-text: #ffffff;

    --radius-login: 5px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--login-accent-1, #667eea) 0%, var(--login-accent-2, #764ba2) 100%);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    background: var(--login-surface, white);
    border-radius: var(--radius-xl, 10px);
    box-shadow: 0 15px 35px var(--shadow-color, rgba(0, 0, 0, 0.1));
    padding: 2rem;
    width: 100%;
    max-width: 400px;
}

.login-form h1 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--login-text, #333);
    font-weight: 300;
}

.login-logo {
    display: block;
    margin: 0 auto 2rem auto;
    width: 80px;
    height: 80px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--login-label, #555);
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--login-border, #e1e1e1);
    border-radius: var(--radius-login, 5px);
    font-size: 1rem;
    transition: border-color var(--dur-md, 0.3s) var(--ease-standard, ease);
}

.form-group input:focus {
    outline: none;
    border-color: var(--login-accent-1, #667eea);
}

.btn-primary, .btn-secondary {
    width: 100%;
    padding: 0.75rem;
    border: none;
    border-radius: var(--radius-login, 5px);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--dur-md, 0.3s) var(--ease-standard, ease);
    margin-bottom: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--login-accent-1, #667eea) 0%, var(--login-accent-2, #764ba2) 100%);
    color: var(--login-btn-text, white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--login-primary-shadow, rgba(102, 126, 234, 0.4));
}

.btn-secondary {
    background: var(--login-secondary-bg, #f8f9fa);
    color: var(--login-text, #333);
    border: 2px solid var(--login-border, #e1e1e1);
}

.btn-secondary:hover {
    background: var(--login-secondary-hover, #e9ecef);
}

.error {
    background: var(--login-error-bg, #f8d7da);
    color: var(--login-error-text, #721c24);
    padding: 0.75rem;
    border-radius: var(--radius-login, 5px);
    margin-bottom: 1rem;
    border: 1px solid var(--login-error-border, #f5c6cb);
}

.forgot-password {
    text-align: center;
    margin-top: 1rem;
}

.forgot-password a {
    color: var(--login-accent-1, #667eea);
    text-decoration: none;
    font-size: 0.9rem;
}

.forgot-password a:hover {
    text-decoration: underline;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--overlay-bg, rgba(0, 0, 0, 0.5));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-popup, 1000);
}

.modal-content {
    background: var(--login-surface, white);
    border-radius: var(--radius-xl, 10px);
    padding: 2rem;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 15px 35px var(--shadow-hover, rgba(0, 0, 0, 0.2));
}

.modal-content h3 {
    margin-bottom: 1.5rem;
    color: var(--login-text, #333);
}

.modal-actions {
    display: flex;
    gap: 1rem;
}

.modal-actions button {
    flex: 1;
    margin-bottom: 0;
}

.passkey-section {
    margin: 1rem 0;
    padding-top: 1rem;
    border-top: 1px solid var(--login-border, #e1e1e1);
}

@media (max-width: 480px) {
    .login-container {
        margin: 1rem;
        padding: 1.5rem;
    }
}