/* Mobile First Responsive Design */

/* Extra Small Devices (phones, less than 576px) */
@media (max-width: 575.98px) {
    :root {
        --spacing-xs: 0.125rem;
        --spacing-sm: 0.25rem;
        --spacing-md: 0.75rem;
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
        --spacing-2xl: 2rem;
        --spacing-3xl: 2.5rem;
    }

    .navbar {
        padding: 0;
    }

    .nav-container {
        padding: 0 var(--spacing-md);
        height: 60px;
    }

    .nav-brand {
        font-size: var(--font-size-lg);
    }

    .nav-brand i {
        font-size: var(--font-size-xl);
    }

    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 60px);
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--spacing-2xl);
        transition: left 0.3s ease-in-out;
        border-top: 1px solid var(--border-primary);
        z-index: 999;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-list {
        flex-direction: column;
        gap: var(--spacing-xl);
        margin-bottom: var(--spacing-2xl);
    }

    .nav-link {
        font-size: var(--font-size-lg);
        padding: var(--spacing-md) var(--spacing-lg);
    }

    .nav-actions {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .main-content {
        margin-top: 60px;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .section {
        padding: var(--spacing-2xl) 0;
    }

    .modal-content {
        padding: var(--spacing-xl);
        width: 95%;
        max-height: 85vh;
    }

    .card {
        padding: var(--spacing-lg);
    }

    .btn {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-base);
    }

    .ai-chat-window {
        width: calc(100vw - 40px);
        height: calc(100vh - 140px);
        bottom: 80px;
        right: -10px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }

    .social-links {
        justify-content: center;
    }

    .toast {
        max-width: calc(100vw - 40px);
        margin: 0 var(--spacing-md) var(--spacing-sm) var(--spacing-md);
    }

    .toast-container {
        right: 0;
        left: 0;
    }

    /* Form adjustments for mobile */
    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px; /* Prevents zoom on iOS */
    }
}

/* Small Devices (landscape phones, 576px and up) */
@media (min-width: 576px) and (max-width: 767.98px) {
    .nav-menu {
        gap: var(--spacing-lg);
    }

    .nav-list {
        gap: var(--spacing-lg);
    }

    .modal-content {
        width: 85%;
    }

    .ai-chat-window {
        width: 380px;
    }

    .grid-cols-2 {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Medium Devices (tablets, 768px and up) */
@media (min-width: 768px) and (max-width: 991.98px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--spacing-2xl);
        transition: left 0.3s ease-in-out;
        border-top: 1px solid var(--border-primary);
        z-index: 999;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-list {
        flex-direction: column;
        gap: var(--spacing-xl);
        margin-bottom: var(--spacing-xl);
    }

    .nav-actions {
        flex-direction: row;
        gap: var(--spacing-md);
    }

    .modal-content {
        width: 80%;
    }

    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Large Devices (desktops, 992px and up) */
@media (min-width: 992px) and (max-width: 1199.98px) {
    .nav-toggle {
        display: none;
    }

    .nav-menu {
        position: static;
        flex-direction: row;
        height: auto;
        background: transparent;
        padding-top: 0;
        border-top: none;
    }

    .nav-list {
        flex-direction: row;
    }

    .nav-actions {
        flex-direction: row;
    }

    .grid-cols-4 {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Extra Large Devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }

    .footer-content {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Ultra Wide Screens (1400px and up) */
@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
}

/* Landscape Orientation for Mobile Devices */
@media (max-width: 767.98px) and (orientation: landscape) {
    .nav-menu {
        height: calc(100vh - 60px);
        padding-top: var(--spacing-lg);
    }

    .nav-list {
        gap: var(--spacing-md);
    }

    .ai-chat-window {
        height: calc(100vh - 120px);
        width: 50vw;
        min-width: 350px;
    }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2),
       (min-resolution: 192dpi) {
    .nav-brand i,
    .btn i {
        transform: translateZ(0); /* Force hardware acceleration */
    }
}

/* Dark Mode Support (System Preference) */
@media (prefers-color-scheme: dark) {
    /* Already using dark theme, so no changes needed */
    /* But we can enhance contrast for better accessibility */
    :root {
        --text-primary: #ffffff;
        --text-secondary: #d1d5db;
        --bg-primary: #000000;
        --bg-secondary: #111111;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --border-primary: #ffffff;
        --border-secondary: #ffffff;
        --text-secondary: #ffffff;
        --text-muted: #cccccc;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .nav-menu {
        transition: none;
    }
    
    .nav-toggle span {
        transition: none;
    }
    
    .card,
    .btn,
    .nav-link {
        transition: none;
    }
    
    .loading-spinner {
        animation: none;
        border-top-color: var(--primary-color);
    }
}

/* Print Styles */
@media print {
    .navbar,
    .nav-toggle,
    .ai-chat-widget,
    .toast-container,
    .modal {
        display: none !important;
    }
    
    .main-content {
        margin-top: 0;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .card {
        border: 1px solid #ccc;
        break-inside: avoid;
    }
    
    a {
        text-decoration: underline;
    }
    
    a[href]:after {
        content: " (" attr(href) ")";
    }
}

/* Specific Component Responsive Adjustments */

/* Hero Section */
@media (max-width: 767.98px) {
    .hero-title {
        font-size: var(--font-size-3xl);
        line-height: 1.2;
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .hero-actions {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .hero-actions .btn {
        width: 100%;
    }
}

/* Skill Cards */
@media (max-width: 575.98px) {
    .skill-card {
        padding: var(--spacing-md);
    }
    
    .skill-card h3 {
        font-size: var(--font-size-lg);
    }
}

/* Profile Layout */
@media (max-width: 767.98px) {
    .profile-layout {
        grid-template-columns: 1fr;
    }
    
    .profile-sidebar {
        order: -1;
    }
}

/* Dashboard Grid */
@media (max-width: 991.98px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

/* Chat Interface */
@media (max-width: 575.98px) {
    .chat-modal-content {
        height: 90vh;
        width: 100%;
        margin: 0;
        border-radius: 0;
    }
    
    .ai-chat-window {
        bottom: 70px;
        left: 10px;
        right: 10px;
        width: auto;
    }
}

/* Form Layouts */
@media (max-width: 575.98px) {
    .form-row {
        flex-direction: column;
    }
    
    .form-col {
        width: 100%;
    }
}

/* Table Responsiveness */
@media (max-width: 767.98px) {
    .table-responsive {
        overflow-x: auto;
    }
    
    .table {
        min-width: 600px;
    }
}

/* Accessibility Improvements for Touch Devices */
@media (hover: none) and (pointer: coarse) {
    .btn {
        min-height: 44px; /* Apple's recommended minimum touch target */
        min-width: 44px;
    }
    
    .nav-link {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .card:hover {
        transform: none;
        box-shadow: var(--shadow-md);
    }
    
    .hover-lift:hover,
    .hover-scale:hover,
    .hover-rotate:hover {
        transform: none;
    }
}