/**
 * QueryCraft - Comprehensive Mobile & Touch Design System
 * Touch-friendly breakpoints for Mobile, Tablet, Laptop, and Desktop.
 */

/* ==========================================================================
   Code Editor Writing Board Textarea & Overlay Sync Alignment
   ========================================================================== */
.qc-highlight-overlay, .qc-editor-textarea {
    -webkit-text-size-adjust: 100% !important;
    -moz-text-size-adjust: 100% !important;
    text-size-adjust: 100% !important;
    font-family: var(--qc-font-mono) !important;
    font-size: 13.5px !important;
    line-height: 1.55 !important;
    letter-spacing: 0px !important;
    word-spacing: 0px !important;
    tab-size: 4 !important;
    -moz-tab-size: 4 !important;
    white-space: pre !important;
    word-break: normal !important;
    box-sizing: border-box !important;
}

.qc-editor-textarea {
    caret-color: var(--qc-primary) !important;
}

/* ==========================================================================
   Desktop Collapsed Sidebar Mode
   ========================================================================== */
.qc-sidebar.is-collapsed {
    width: var(--qc-sidebar-collapsed-w) !important;
    padding: 12px 8px !important;
}

.qc-sidebar.is-collapsed .qc-nav-group-title,
.qc-sidebar.is-collapsed .qc-nav-item span:not(.qc-nav-icon) {
    display: none !important;
}

.qc-sidebar.is-collapsed .qc-nav-item {
    justify-content: center !important;
    padding: 10px 0 !important;
}

/* Sidebar Backdrop Overlay for Mobile/Tablet Drawer */
.qc-sidebar-backdrop {
    position: fixed;
    top: var(--qc-header-h);
    left: 0;
    width: 100vw;
    height: calc(100vh - var(--qc-header-h));
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    z-index: 890;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.qc-sidebar-backdrop.is-open {
    opacity: 1;
    pointer-events: auto;
}

/* Tab Group Horizontal Touch Scroll */
.qc-tab-group {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
    padding-bottom: 6px;
    scrollbar-width: thin;
}

.qc-tab-btn {
    flex-shrink: 0;
}

/* ==========================================================================
   Laptop Breakpoint (< 1200px)
   ========================================================================== */
@media (max-width: 1200px) {
    .qc-tagline {
        display: none !important;
    }

    .qc-stats-bar {
        gap: 12px;
        flex-wrap: wrap;
    }
}

/* ==========================================================================
   Tablet Breakpoint (< 992px)
   ========================================================================== */
@media (max-width: 992px) {
    html, body, #qc-app {
        height: auto !important;
        min-height: 100dvh !important;
        overflow-x: hidden !important;
        overflow-y: auto !important;
    }

    /* Convert Sidebar into Sliding Mobile Drawer */
    .qc-mobile-menu-btn {
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        width: 36px !important;
        height: 36px !important;
        border-radius: 8px !important;
        background: var(--qc-bg-card) !important;
        border: 1px solid var(--qc-border-color) !important;
        color: var(--qc-text-main) !important;
        font-size: 1.2rem !important;
        cursor: pointer !important;
        margin-right: 6px !important;
        flex-shrink: 0 !important;
    }

    .qc-sidebar {
        position: fixed !important;
        top: var(--qc-header-h) !important;
        left: 0 !important;
        bottom: 0 !important;
        width: 270px !important;
        z-index: 950 !important;
        transform: translateX(-100%) !important;
        transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1) !important;
        box-shadow: var(--qc-shadow-lg) !important;
        background: var(--qc-bg-sidebar) !important;
    }

    .qc-sidebar.is-open {
        transform: translateX(0) !important;
    }

    .qc-main-layout {
        flex-direction: column;
        height: auto !important;
        min-height: calc(100dvh - var(--qc-header-h)) !important;
        overflow: visible !important;
    }

    .qc-workspace {
        width: 100% !important;
        padding: 12px 10px 48px 10px !important;
        height: auto !important;
        min-height: calc(100dvh - var(--qc-header-h)) !important;
        overflow-y: auto !important;
        box-sizing: border-box !important;
    }

    .qc-view {
        height: auto !important;
        min-height: 100% !important;
        padding-bottom: max(40px, env(safe-area-inset-bottom)) !important;
        overflow: visible !important;
    }

    .qc-toolbar {
        flex-wrap: wrap;
        gap: 10px;
    }

    .qc-toolbar-left,
    .qc-toolbar-right {
        width: 100%;
        justify-content: flex-start;
        flex-wrap: wrap;
        gap: 8px;
    }

    /* Challenge Split Workspace Stacking */
    .qc-challenge-workspace {
        grid-template-columns: 1fr !important;
        flex-direction: column;
        gap: 16px;
    }

    .qc-erd-workspace {
        height: calc(100dvh - 220px) !important;
        min-height: 400px !important;
        max-height: 540px !important;
        touch-action: none !important;
        margin-bottom: 20px;
    }

    .qc-erd-drawer {
        width: 100% !important;
        max-width: 100% !important;
    }
}

/* ==========================================================================
   Mobile Phone Breakpoint (< 768px)
   ========================================================================== */
@media (max-width: 768px) {
    :root {
        --qc-header-h: 56px;
    }

    .qc-navbar {
        padding: 0 10px;
        justify-content: space-between;
    }

    .qc-nav-brand {
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .qc-nav-brand span:not(.qc-logo-icon) {
        font-size: 0.95rem;
    }

    .qc-search-trigger span:nth-child(2) {
        display: none;
    }

    .qc-search-trigger {
        padding: 6px 10px;
        font-size: 0.8rem;
    }

    .qc-kbd {
        display: none !important;
    }

    .qc-db-select-wrapper span {
        display: none;
    }

    .qc-select {
        padding: 5px 8px;
        font-size: 0.78rem;
        max-width: 110px;
    }

    #qc-help-btn {
        display: flex !important;
        align-items: center;
        justify-content: center;
        padding: 6px 10px !important;
        min-height: 36px;
    }

    #qc-shortcuts-modal .qc-modal-body > div {
        grid-template-columns: 1fr !important;
        gap: 8px !important;
    }

    .qc-btn {
        min-height: 38px;
        padding: 6px 12px;
        font-size: 0.8rem;
    }

    .qc-toolbar-left .qc-btn,
    .qc-toolbar-right .qc-btn {
        flex: 1 1 auto;
        justify-content: center;
    }

    .qc-export-dropdown {
        width: 100%;
        margin-top: 4px;
    }

    .qc-stats-bar {
        padding: 8px 12px;
        font-size: 0.76rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }

    .qc-editor-container {
        min-height: 180px;
        height: 220px;
    }

    .qc-results-container {
        max-height: 360px;
    }

    /* Table Touch Scroll Wrapping */
    .qc-table-responsive {
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .qc-table {
        min-width: 500px;
    }

    /* Schema Explorer Mobile Header */
    .qc-schema-explorer-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        margin-top: 4px;
        margin-bottom: 12px;
        padding-bottom: 8px;
    }

    .qc-schema-view-toggle {
        width: 100%;
    }

    .qc-schema-tab-btn {
        flex: 1;
        text-align: center;
    }

    /* Modern ER Diagram Mobile Styling */
    .qc-erd-workspace {
        position: relative;
        width: 100%;
        height: calc(100dvh - 230px) !important;
        min-height: 380px !important;
        max-height: 520px !important;
        overflow: hidden;
        border-radius: 14px;
        border: 1px solid var(--qc-border-color);
        background: #0b1329 !important;
        touch-action: none !important;
        margin-bottom: 24px;
    }

    .qc-erd-viewport {
        touch-action: none !important;
        user-select: none;
        -webkit-user-select: none;
        background-image: radial-gradient(rgba(59, 130, 246, 0.25) 1px, transparent 1px) !important;
        background-size: 24px 24px !important;
    }

    .qc-erd-toolbar {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 6px;
        padding: 8px 10px;
        background: rgba(15, 23, 42, 0.88) !important;
        backdrop-filter: blur(12px);
        border-radius: 12px;
        border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .qc-erd-toolbar-group {
        display: flex;
        align-items: center;
        gap: 4px;
        flex-wrap: wrap;
    }

    .qc-erd-btn {
        padding: 5px 9px;
        font-size: 0.75rem;
        min-height: 32px;
        border-radius: 6px;
    }

    .qc-erd-search {
        width: 100%;
    }

    .qc-erd-search input {
        width: 100%;
    }

    /* Challenges, Lessons & Saved Queries Mobile Grid */
    .qc-challenge-grid,
    .qc-lessons-grid,
    .qc-saved-grid {
        grid-template-columns: 1fr !important;
        gap: 14px !important;
        padding-bottom: 24px !important;
    }

    .qc-modal {
        width: 95vw !important;
        max-width: 95vw !important;
        margin: 10px auto;
        padding: 14px !important;
        max-height: 88vh !important;
        overflow-y: auto;
    }

    .qc-continue-banner {
        flex-direction: column;
        align-items: flex-start !important;
    }

    .qc-continue-banner button {
        width: 100%;
        justify-content: center;
    }
}

/* ==========================================================================
   Small Mobile Phone Breakpoint (< 480px)
   ========================================================================== */
@media (max-width: 480px) {
    .qc-nav-brand span:not(.qc-logo-icon) {
        display: none !important;
    }

    .qc-nav-center {
        gap: 4px;
    }

    .qc-nav-right {
        gap: 4px;
    }

    .qc-btn span {
        font-size: 0.76rem;
    }

    .qc-stat-item {
        font-size: 0.72rem;
    }

    .qc-erd-workspace {
        height: calc(100dvh - 240px) !important;
        min-height: 360px !important;
        max-height: 480px !important;
    }

    .qc-quiz-options button {
        width: 100%;
    }
}