:root {
    --primary-color: #2196F3;
    --primary-hover: #1976D2;
    --secondary-color: #757575;
    --error-color: #f44336;
    --success-color: #4CAF50;
    --background: #f5f5f5;
    --card-background: #ffffff;
    --text-primary: #212121;
    --text-secondary: #757575;
    --border-radius: 8px;
    --box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    --box-shadow-hover: 0 4px 16px rgba(0,0,0,0.15);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
}

.container {
    width: 100%;
    max-width: 1200px;
    padding: 20px;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

/* Login Page Styles */
.login-box {
    background: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 40px;
    max-width: 400px;
    margin: 0 auto;
    animation: fadeIn 0.3s ease-in;
}

.login-box h1 {
    text-align: center;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 14px;
}

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

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

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 14px;
    transition: border-color 0.3s;
}

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

.error-message {
    color: var(--error-color);
    font-size: 14px;
    margin-bottom: 15px;
    display: none;
    padding: 10px;
    background: rgba(244, 67, 54, 0.1);
    border-radius: 4px;
}

.error-message.show {
    display: block;
}

.btn-primary, .btn-secondary {
    width: 100%;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--box-shadow);
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background: #616161;
}

/* Dashboard Styles */
.dashboard {
    background: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 30px;
    animation: fadeIn 0.3s ease-in;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #f0f0f0;
}

.dashboard-header h1 {
    font-size: 28px;
    color: var(--text-primary);
}

.dashboard-header .btn-secondary {
    width: auto;
    padding: 10px 20px;
    font-size: 14px;
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.service-card {
    background: var(--card-background);
    border: 2px solid #e0e0e0;
    border-radius: var(--border-radius);
    padding: 24px;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    color: var(--text-primary);
    display: block;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--box-shadow-hover);
    border-color: var(--primary-color);
}

.service-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    font-size: 24px;
}

.service-card h3 {
    margin-bottom: 8px;
    font-size: 18px;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

.service-url {
    font-size: 12px;
    color: var(--primary-color);
    margin-top: 8px;
    font-family: monospace;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .dashboard-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    .dashboard-header .btn-secondary {
        width: 100%;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }
}

/* Loading State */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}