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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --danger: #dc2626;
    --bg: #f1f5f9;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --shadow: rgba(0, 0, 0, 0.1);
    --warning: #f59e0b;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-box {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.login-header {
    text-align: center;
    padding: 40px 30px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.lock-icon {
    font-size: 4rem;
    margin-bottom: 16px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.login-header h1 {
    font-size: 1.75rem;
    margin-bottom: 8px;
}

.login-header p {
    font-size: 1rem;
    opacity: 0.9;
}

.login-form {
    padding: 30px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text);
}

.password-group {
    position: relative;
}

.password-wrapper {
    position: relative;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.password-group .form-control {
    padding-right: 50px;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
}

.toggle-password {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 4px;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.toggle-password:hover {
    opacity: 1;
}

.error-message {
    background: #fee2e2;
    color: #991b1b;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid var(--danger);
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.btn-login {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-login:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.btn-login:active {
    transform: translateY(0);
}

.login-footer {
    padding: 20px 30px;
    text-align: center;
    border-top: 1px solid var(--border);
}

.back-link {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--primary);
}

.security-notice {
    padding: 20px 30px;
    text-align: center;
    background: #f0fdf4;
    border-top: 1px solid var(--border);
}

.security-notice p {
    color: #166534;
    font-weight: 500;
    margin-bottom: 4px;
}

.security-notice small {
    color: #15803d;
    font-size: 0.85rem;
}

.setup-notice {
    padding: 20px 30px;
    background: #fef3c7;
    border-top: 1px solid var(--border);
}

.setup-notice details {
    cursor: pointer;
}

.setup-notice summary {
    font-weight: 500;
    color: #78350f;
    padding: 8px;
    border-radius: 6px;
    transition: background 0.2s;
}

.setup-notice summary:hover {
    background: rgba(217, 119, 6, 0.1);
}

.setup-content {
    margin-top: 12px;
    padding: 12px;
    background: white;
    border-radius: 8px;
    font-size: 0.9rem;
}

.setup-content p {
    margin-bottom: 8px;
    color: var(--text);
}

.setup-content code {
    background: #f1f5f9;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: var(--primary);
    font-weight: 600;
}

.setup-content .warning {
    color: var(--danger);
    font-weight: 500;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 480px) {
    .login-container {
        padding: 12px;
    }
    
    .login-header {
        padding: 30px 20px 20px;
    }
    
    .login-header h1 {
        font-size: 1.5rem;
    }
    
    .lock-icon {
        font-size: 3rem;
    }
    
    .login-form {
        padding: 24px 20px;
    }
}