/* ==========================================================================
   OTS Enterprise Universal Mobile Responsiveness Engine
   Provides off-canvas navigation, adaptive grids, mobile topbar, and CBT controls.
   ========================================================================== */

/* Prevent iOS Safari auto-zoom on form inputs */
@media screen and (max-width: 767.98px) {
    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="number"],
    input[type="search"],
    input[type="tel"],
    select.form-select,
    textarea.form-control {
        font-size: 15px !important;
    }
}

/* ==========================================================================
   1. Mobile Off-Canvas Drawer Navigation (< 992px)
   ========================================================================== */
@media (max-width: 991.98px) {
    /* Hide desktop sidebar behavior and convert to smooth off-canvas drawer */
    #sidebar {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        bottom: 0 !important;
        height: 100vh !important;
        width: 280px !important;
        max-width: 82vw !important;
        background-color: #ffffff !important;
        box-shadow: none !important;
        transform: translateX(-100%) !important;
        transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.28s ease !important;
        z-index: 1070 !important;
        display: flex !important;
        flex-direction: column !important;
        overflow-y: auto !important;
        -webkit-overflow-scrolling: touch;
    }

    #sidebar.show,
    #sidebar.open,
    #sidebar.active {
        transform: translateX(0) !important;
        box-shadow: 0 0 35px rgba(15, 23, 42, 0.4) !important;
        visibility: visible !important;
    }

    /* Lock body scroll when mobile drawer is open */
    body.sidebar-open {
        overflow: hidden !important;
        touch-action: none;
    }

    /* Dark frosted backdrop */
    .sidebar-backdrop {
        display: none;
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        right: 0 !important;
        bottom: 0 !important;
        width: 100vw !important;
        height: 100vh !important;
        background: rgba(15, 23, 42, 0.6) !important;
        backdrop-filter: blur(2px) !important;
        -webkit-backdrop-filter: blur(2px) !important;
        z-index: 1060 !important;
        opacity: 0 !important;
        visibility: hidden !important;
        pointer-events: none !important;
        transition: opacity 0.25s ease, visibility 0.25s ease !important;
    }

    .sidebar-backdrop.show {
        display: block !important;
        opacity: 1 !important;
        visibility: visible !important;
        pointer-events: auto !important;
    }

    .mobile-hamburger-btn {
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        width: 38px !important;
        height: 38px !important;
        min-width: 38px !important;
        padding: 0 !important;
        border-radius: 8px !important;
        background-color: #ffffff !important;
        color: #0f172a !important;
        cursor: pointer !important;
        border: 1px solid #e2e8f0 !important;
        box-shadow: 0 1px 3px rgba(0,0,0,0.06) !important;
        touch-action: manipulation !important;
        -webkit-tap-highlight-color: transparent !important;
    }

    .mobile-hamburger-btn:active {
        background-color: #f1f5f9 !important;
        transform: scale(0.96) !important;
    }

    /* Expand main content to full screen width */
    #main-content {
        margin-left: 0 !important;
        width: 100% !important;
        max-width: 100vw !important;
        padding: 12px 14px !important;
        overflow-x: hidden !important;
    }

    /* Top Bar Mobile Layout */
    .top-bar {
        display: flex !important;
        align-items: center !important;
        justify-content: space-between !important;
        flex-wrap: wrap !important;
        gap: 8px !important;
        margin-bottom: 14px !important;
        padding-bottom: 10px !important;
    }

    .top-bar .page-title {
        font-size: 1.15rem !important;
        display: flex !important;
        align-items: center !important;
        margin: 0 !important;
        font-weight: 700 !important;
    }

    .top-bar .user-profile {
        gap: 6px !important;
    }

    /* Hide redundant long username strings on compact mobile screens to prevent overflow */
    .top-bar .user-info {
        display: none !important;
    }

    .top-bar .user-profile i.bi-person-circle {
        font-size: 1.4rem !important;
    }

    .top-bar .btn-sm {
        padding: 4px 8px !important;
        font-size: 0.78rem !important;
    }
}

/* Extra small mobile screens (< 576px) */
@media (max-width: 575.98px) {
    #main-content {
        padding: 10px 8px !important;
    }

    .top-bar {
        padding-bottom: 8px !important;
        margin-bottom: 10px !important;
    }

    .top-bar .page-title {
        font-size: 1.05rem !important;
    }

    /* Modals should fit screen with comfortable padding */
    .modal-dialog {
        margin: 8px !important;
        max-width: calc(100% - 16px) !important;
    }

    .modal-content {
        border-radius: 14px !important;
    }
}

/* ==========================================================================
   2. Tables, Panels & Data Grids Responsiveness
   ========================================================================== */
.table-responsive {
    width: 100% !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    margin-bottom: 1rem !important;
}

/* Ensure any un-wrapped tables inside panels or cards don't break viewport */
.panel > table,
.card-body > table {
    max-width: 100% !important;
    overflow-x: auto !important;
}

/* Modern styling for legacy .panel elements across student/teacher dashboards */
.panel {
    background: #ffffff;
    border-radius: 12px;
    padding: 20px;
    border: 1px solid #e2e8f0;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

@media (max-width: 767.98px) {
    .panel {
        padding: 14px 12px !important;
        border-radius: 10px !important;
    }

    .table-responsive table {
        font-size: 0.8rem !important;
    }

    .table-responsive .btn-sm {
        padding: 2px 6px !important;
        font-size: 0.72rem !important;
    }

    /* Keep action button groups aligned */
    .table td .btn,
    .table td a.btn {
        margin-bottom: 2px;
    }

    /* Stack or scale input groups on small screens */
    .input-group {
        max-width: 100% !important;
    }
}

/* Login screens mobile optimizations */
@media (max-width: 575.98px) {
    .login-container {
        padding: 16px 12px !important;
        min-height: 90vh !important;
    }
    .login-card {
        padding: 1.5rem 1.25rem !important;
        border-radius: 14px !important;
    }
}

/* ==========================================================================
   3. Mobile Card & Dashboard Widgets
   ========================================================================== */
@media (max-width: 767.98px) {
    .stat-card {
        padding: 12px 14px !important;
        margin-bottom: 10px !important;
    }

    .stat-card .stat-value {
        font-size: 1.35rem !important;
    }

    .stat-card .stat-title {
        font-size: 0.7rem !important;
    }

    /* Impersonation Notice Bar on Mobile */
    .impersonation-bar,
    .alert-impersonation {
        padding: 8px 12px !important;
        font-size: 0.8rem !important;
    }
}

/* ==========================================================================
   4. Student CBT Examination Mobile Experience
   ========================================================================== */
@media (max-width: 991.98px) {
    .cbt-header {
        position: sticky !important;
        top: 0 !important;
        z-index: 1030 !important;
        padding: 10px 14px !important;
        margin-bottom: 14px !important;
        background: #ffffff !important;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08) !important;
        display: flex !important;
        flex-direction: row !important;
        justify-content: space-between !important;
        align-items: center !important;
        gap: 8px !important;
    }

    .cbt-header .test-meta {
        display: flex !important;
        align-items: center !important;
        gap: 6px !important;
    }

    .cbt-header .test-title {
        font-size: 0.95rem !important;
        max-width: 180px !important;
        white-space: nowrap !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
    }

    .cbt-timer-badge {
        font-size: 1.05rem !important;
        padding: 6px 12px !important;
    }

    .cbt-question-card {
        padding: 16px 14px !important;
        min-height: auto !important;
    }

    .cbt-question-prompt {
        font-size: 1.05rem !important;
        line-height: 1.5 !important;
        margin-bottom: 16px !important;
    }

    .cbt-option-card {
        padding: 12px 14px !important;
        margin-bottom: 8px !important;
        border-radius: 8px !important;
    }

    .cbt-option-letter {
        width: 30px !important;
        height: 30px !important;
        font-size: 0.85rem !important;
        margin-right: 12px !important;
        border-radius: 6px !important;
    }

    .cbt-option-text {
        font-size: 0.92rem !important;
    }

    /* Question Navigator Palette on Mobile */
    .cbt-palette-grid {
        grid-template-columns: repeat(6, 1fr) !important;
        gap: 6px !important;
        max-height: 240px !important;
    }

    .cbt-palette-btn {
        font-size: 0.85rem !important;
        padding: 6px 0 !important;
        border-radius: 4px !important;
    }
}

@media (max-width: 575.98px) {
    .cbt-header .test-title {
        max-width: 130px !important;
    }

    .cbt-timer-badge {
        font-size: 0.95rem !important;
        padding: 5px 10px !important;
        letter-spacing: 0.5px !important;
    }

    .cbt-palette-grid {
        grid-template-columns: repeat(5, 1fr) !important;
    }
}

/* ==========================================================================
   5. Nav Tabs & Navigation Pills Scrollable Container (< 768px)
   ========================================================================== */
@media (max-width: 767.98px) {
    .nav-tabs {
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
        padding-bottom: 4px !important;
        gap: 4px !important;
    }

    .nav-tabs .nav-link {
        white-space: nowrap !important;
        padding: 8px 12px !important;
        font-size: 0.82rem !important;
    }

    .nav-pills {
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
        padding-bottom: 4px !important;
        gap: 4px !important;
    }

    .nav-pills .nav-link {
        white-space: nowrap !important;
        padding: 6px 12px !important;
        font-size: 0.82rem !important;
    }
}