/* Notification System */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--primary-color);
    min-width: 300px;
    z-index: 9999;
    transform: translateX(400px);
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.notification.show {
    transform: translateX(0);
}

.notification.hide {
    transform: translateX(400px);
}

.notification-success {
    border-left-color: var(--secondary-color);
}

.notification-error {
    border-left-color: var(--warning-color);
}

.notification-close {
    background: none;
    border: none;
    color: var(--gray-500);
    cursor: pointer;
    margin-left: auto;
    padding: var(--space-xs);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.notification-close:hover {
    background: var(--gray-100);
    color: var(--gray-700);
}

/* Mobile Menu Styles */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
        background: none;
        border: none;
        font-size: 1.5rem;
        color: var(--gray-700);
        cursor: pointer;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--space-lg);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-normal);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-links li {
        margin: var(--space-md) 0;
    }

    @media (min-width: 769px) {
        .mobile-menu-toggle {
            display: none;
        }
    }
}

/* Loading States */
.loading {
    pointer-events: none;
    opacity: 0.6;
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--gray-300);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

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

/* Tech Stack Visualization */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-lg);
    margin: var(--space-2xl) 0;
}

.tech-item {
    background: white;
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    cursor: pointer;
}

.tech-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.tech-icon {
    width: 40px;
    height: 40px;
    margin-bottom: var(--space-md);
}

.tech-name {
    display: block;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--space-sm);
}

.tech-level {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-md);
    color: white;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --gray-50: #1f2937;
        --gray-100: #374151;
        --gray-900: #f9fafb;
    }
}

.dark {
    --gray-50: #1f2937;
    --gray-100: #374151;
    --gray-200: #4b5563;
    --gray-300: #6b7280;
    --gray-700: #e5e7eb;
    --gray-800: #f3f4f6;
    --gray-900: #f9fafb;
}

/* Accessibility Improvements */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    transition: top 0.3s;
    border-radius: var(--radius-sm);
}

.skip-link:focus {
    top: 6px;
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus,
input:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}