/* ============================================
   DREXET AI - Responsive Design
   Mobile-first responsive breakpoints
   ============================================ */

/* Mobile First Approach */
/* Base styles are for mobile (320px+) */

/* Touch Target Sizes - Ensure minimum 44x44px for accessibility */
button,
a,
input[type="button"],
input[type="submit"],
.sidebar-icon-btn,
.input-icon-btn,
.header-icon-btn,
.chat-action-btn,
.message-action-btn {
    min-height: 44px;
    min-width: 44px;
}

/* Mobile-specific enhancements (< 480px) */
@media (max-width: 480px) {
    /* Sidebar behavior on mobile */
    .sidebar {
        position: fixed;
        left: -100%;
        top: 0;
        bottom: 0;
        width: 280px;
        z-index: var(--z-modal);
        transition: left var(--transition-base);
        box-shadow: var(--shadow-xl);
    }
    
    .sidebar.expanded {
        left: 0;
    }
    
    .sidebar.collapsed {
        left: -100%;
    }
    
    /* App header adjustments */
    .app-name-header {
        left: 0;
        padding: 0 12px;
    }
    
    /* Main content adjustments */
    .main-content {
        margin-left: 0;
        padding-top: 60px;
    }
    
    /* Messages */
    .message {
        max-width: 90%;
        padding: 12px;
        font-size: 0.9375rem;
    }
    
    /* Input area */
    .input-area {
        padding: 12px;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        border-top: 1px solid var(--border-color);
        background: var(--bg-primary);
    }
    
    .input-wrapper {
        flex-direction: column;
        gap: 8px;
    }
    
    .input-icon-btn {
        width: 40px;
        height: 40px;
    }
    
    /* Chat container padding for fixed input */
    .chat-container {
        padding-bottom: 120px;
    }
    
    /* Feature panel */
    .feature-panel {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        z-index: calc(var(--z-modal) - 1);
    }
    
    /* Modal adjustments */
    .modal-content {
        width: 95%;
        max-height: 90vh;
        margin: 5vh auto;
    }
    
    /* Welcome screen */
    .welcome-screen {
        padding: 24px 16px;
    }
    
    .welcome-content h1 {
        font-size: 1.5rem;
    }
    
    .quick-actions {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    /* Settings */
    .settings-tabs {
        flex-direction: column;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    /* Search */
    .search-input-main {
        font-size: 16px; /* Prevents zoom on iOS */
    }
    
    /* Message actions */
    .message-actions {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    /* Chat header */
    .chat-header {
        padding: 0 12px;
        height: 56px;
    }
    
    /* File list */
    .file-list {
        flex-direction: column;
    }
    
    .file-item {
        width: 100%;
    }
}

/* Tablet-specific styles (480px - 768px) */
@media (min-width: 480px) and (max-width: 768px) {
    .sidebar {
        width: 240px;
    }
    
    .sidebar.collapsed {
        width: var(--sidebar-collapsed-width);
    }
    
    .message {
        max-width: 85%;
    }
    
    .input-area {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .quick-actions {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) {
    .quick-actions {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .options-grid {
        grid-template-columns: repeat(1, 1fr);
    }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
    .sidebar {
        width: var(--sidebar-width);
    }
    
    .sidebar.collapsed {
        width: var(--sidebar-collapsed-width);
    }
    
    .mobile-menu-btn {
        display: none;
    }
    
    .quick-actions {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .options-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .message {
        max-width: 75%;
    }
    
    .modal-content {
        max-width: 600px;
    }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
    .quick-actions {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .message {
        max-width: 70%;
    }
    
    .modal-content {
        max-width: 700px;
    }
}

/* Extra large devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
    .messages-container {
        max-width: 768px;
    }
    
    .input-container {
        max-width: 900px;
    }
    
    .modal-content {
        max-width: 800px;
    }
}

/* Mobile-specific styles (max-width: 767px) */
@media (max-width: 767px) {
    /* Hide sidebar by default on mobile */
    .sidebar:not(.force-visible) {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: var(--z-modal);
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }
    
    .sidebar.active,
    .sidebar.force-visible {
        transform: translateX(0) !important;
    }
    
    .sidebar.collapsed {
        width: var(--sidebar-width);
    }
    
    /* Show mobile menu button */
    .mobile-menu-btn {
        display: flex;
    }
    
    /* Adjust header */
    .main-header {
        padding: 0 var(--spacing-md);
    }
    
    .app-title {
        font-size: var(--font-size-lg);
    }
    
    /* Full width messages on mobile */
    .message {
        max-width: 95%;
        padding: var(--spacing-md);
    }
    
    .message.user {
        max-width: 90%;
    }
    
    .message.assistant {
        max-width: 90%;
    }
    
    /* Adjust welcome screen */
    .welcome-screen {
        padding: var(--spacing-lg);
    }
    
    .welcome-content h1 {
        font-size: var(--font-size-2xl);
    }
    
    .welcome-content p {
        font-size: var(--font-size-base);
    }
    
    /* Stack quick actions */
    .quick-actions {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .quick-action-btn {
        padding: var(--spacing-md);
    }
    
    /* Adjust input area */
    .input-area {
        padding: var(--spacing-md);
    }
    
    .input-wrapper {
        padding: var(--spacing-sm);
    }
    
    /* Hide some header buttons on mobile */
    .header-btn {
        width: 36px;
        height: 36px;
    }
    
    /* Stack options grid */
    .options-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    /* Adjust modal */
    .modal {
        padding: var(--spacing-md);
    }
    
    .modal-content {
        max-width: 100%;
        max-height: 95vh;
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: var(--spacing-md);
    }
    
    /* Adjust toast position */
    .toast-container {
        top: var(--spacing-md);
        right: var(--spacing-md);
        left: var(--spacing-md);
        max-width: 100%;
    }
    
    .toast {
        min-width: auto;
        width: 100%;
    }
    
    /* Adjust chat container padding */
    .chat-container {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    
    /* Smaller font sizes on mobile */
    .message-text {
        font-size: var(--font-size-sm);
    }
    
    /* Adjust sidebar header */
    .sidebar-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .new-chat-btn span {
        display: none;
    }
    
    .new-chat-btn {
        justify-content: center;
        width: 40px;
        height: 40px;
        padding: 0;
    }
    
    /* Hide sidebar section titles on collapsed */
    .sidebar.collapsed .sidebar-section-title {
        display: none;
    }
    
    /* Adjust model stats */
    .model-stats {
        font-size: var(--font-size-xs);
    }
}

/* Tablet-specific styles (768px - 991px) */
@media (min-width: 768px) and (max-width: 991px) {
    .sidebar {
        width: 240px;
    }
    
    .sidebar.collapsed {
        width: var(--sidebar-collapsed-width);
    }
    
    .message {
        max-width: 80%;
    }
    
    .quick-actions {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Landscape orientation adjustments */
@media (orientation: landscape) and (max-height: 600px) {
    .main-header {
        height: 50px;
    }
    
    .welcome-screen {
        padding: var(--spacing-md);
    }
    
    .welcome-content h1 {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-sm);
    }
    
    .welcome-content p {
        font-size: var(--font-size-sm);
        margin-bottom: var(--spacing-md);
    }
    
    .quick-actions {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-sm);
        margin-top: var(--spacing-md);
    }
    
    .quick-action-btn {
        padding: var(--spacing-sm);
    }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .message-avatar,
    .icon-btn,
    .header-btn {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Print styles */
@media print {
    .sidebar,
    .main-header,
    .input-area,
    .modal,
    .toast-container {
        display: none;
    }
    
    .main-content {
        width: 100%;
    }
    
    .chat-container {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    
    .message {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .loading-screen,
    .loading-circle,
    .loading-hand,
    .typing-dots span,
    .spinner {
        animation: none !important;
    }
}

/* Dark mode media query (if not using data-theme) */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-primary: #212121;
        --bg-secondary: #2d2d2d;
        --bg-tertiary: #3a3a3a;
        --bg-hover: #353535;
        --bg-active: #404040;
        
        --text-primary: #ececf1;
        --text-secondary: #c5c5d2;
        --text-tertiary: #8e8ea0;
        
        --border-color: #40414f;
        --border-hover: #565869;
    }
}

/* Light mode media query (if not using data-theme) */
@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) {
        --bg-primary: #ffffff;
        --bg-secondary: #f7f7f8;
        --bg-tertiary: #ececf1;
        --bg-hover: #f0f0f0;
        --bg-active: #e5e5e5;
        
        --text-primary: #353740;
        --text-secondary: #6e6e80;
        --text-tertiary: #8e8ea0;
        
        --border-color: #e5e5e6;
        --border-hover: #d1d1d6;
    }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    /* Larger touch targets */
    .icon-btn,
    .header-btn,
    .input-action-btn,
    .send-btn {
        min-width: 44px;
        min-height: 44px;
    }
    
    .new-chat-btn {
        min-height: 44px;
    }
    
    .chat-item {
        min-height: 44px;
    }
    
    /* Remove hover effects on touch devices */
    .hover-lift:hover,
    .hover-scale:hover,
    .hover-glow:hover {
        transform: none;
        box-shadow: none;
    }
    
    /* Show actions on touch */
    .message-actions,
    .chat-item-actions {
        opacity: 1;
    }
}

/* Hover-capable devices */
@media (hover: hover) {
    .message-actions,
    .chat-item-actions {
        opacity: 0;
    }
    
    .message:hover .message-actions,
    .chat-item:hover .chat-item-actions {
        opacity: 1;
    }
}

/* Very small screens (320px and below) */
@media (max-width: 320px) {
    .app-title {
        font-size: var(--font-size-base);
    }
    
    .welcome-content h1 {
        font-size: var(--font-size-xl);
    }
    
    .quick-actions {
        gap: var(--spacing-xs);
    }
    
    .quick-action-btn {
        padding: var(--spacing-sm);
    }
    
    .quick-action-btn svg {
        width: 24px;
        height: 24px;
    }
    
    .input-area {
        padding: var(--spacing-sm);
    }
}

/* Large screens (1400px and up) */
@media (min-width: 1400px) {
    .messages-container {
        max-width: 768px;
    }
    
    .input-container {
        max-width: 1000px;
    }
    
    .sidebar {
        width: 280px;
    }
}

/* Ultra-wide screens (1920px and up) */
@media (min-width: 1920px) {
    .messages-container {
        max-width: 768px;
    }
    
    .input-container {
        max-width: 1200px;
    }
}

/* Container queries (when supported) */
@container (max-width: 600px) {
    .message {
        max-width: 95%;
    }
}

/* Focus visible for keyboard navigation */
@media (prefers-reduced-motion: no-preference) {
    *:focus-visible {
        outline: 2px solid var(--accent-primary);
        outline-offset: 2px;
        transition: outline-offset var(--transition-fast);
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-primary: #000000;
        --bg-primary: #ffffff;
    }
    
    [data-theme="dark"] {
        --border-color: #ffffff;
        --text-primary: #ffffff;
        --bg-primary: #000000;
    }
    
    .message {
        border: 2px solid var(--border-color);
    }
    
    button {
        border: 2px solid var(--border-color);
    }
}

/* Container adjustments for different viewport heights */
@media (max-height: 600px) {
    .welcome-screen {
        padding: var(--spacing-md);
    }
    
    .welcome-logo {
        margin-bottom: var(--spacing-md);
    }
    
    .welcome-content h1 {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-sm);
    }
    
    .welcome-content p {
        font-size: var(--font-size-sm);
        margin-bottom: var(--spacing-md);
    }
}

@media (min-height: 900px) {
    .chat-container {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    
    .welcome-screen {
        padding: var(--spacing-2xl);
    }
}