/* ============================================================
   RESPONSIVE DESIGN SYSTEM - School Management System
   Comprehensive responsive styles for all screen sizes
   Breakpoints: 480px (xs), 640px (sm), 768px (md), 1024px (lg), 1280px (xl)
   ============================================================ */

/* ============================================================
   BASE & GLOBAL RESPONSIVE FIXES
   ============================================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
}

img,
video,
iframe,
canvas,
svg {
    max-width: 100%;
    height: auto;
}

/* Prevent text overflow everywhere */
p,
h1,
h2,
h3,
h4,
h5,
h6,
span,
a,
li,
td,
th,
label,
div {
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* ============================================================
   MOBILE SIDEBAR OVERLAY
   ============================================================ */
.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 25;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* ============================================================
   HEADER RESPONSIVE STYLES
   ============================================================ */

/* All mobile/tablet screens (< 1024px) */
@media (max-width: 1023px) {

    /* Ensure header height is consistently 56px and padding is clean */
    header.gradient-bg {
        height: 56px !important;
    }

    /* Hide academic context, time, date center section on mobile/tablet */
    header .header-center-section {
        display: none !important;
    }

    /* Ensure user menu button and profile picture are aligned and compact */
    header .dropdown button.flex {
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        padding: 0 !important;
        width: 32px !important;
        height: 32px !important;
        background: transparent !important;
        border: none !important;
    }

    header .w-8.h-8.rounded-full {
        width: 32px !important;
        height: 32px !important;
        flex-shrink: 0 !important;
    }

    /* Simplify right section layout spacing */
    header .header-right-section {
        gap: 6px !important;
        padding-right: 4px !important;
    }

    /* Reduce icon/button sizes for compact mobile header */
    header button.p-2,
    header .dropdown button {
        padding: 6px !important;
        width: 34px !important;
        height: 34px !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
    }
}

/* Extra small screens (< 480px) */
@media (max-width: 480px) {

    /* Hide school name text entirely */
    header .hidden.sm\:block {
        display: none !important;
    }

    /* Force header content to stay on one line and center vertically */
    header .flex {
        flex-wrap: nowrap !important;
        align-items: center !important;
    }

    /* Fixed alignment for visible header items */
    header .flex.justify-between {
        display: flex !important;
        align-items: center !important;
        justify-content: space-between !important;
        width: 100% !important;
    }
}

/* All screens below 1024px (mobile/tablet) - sidebar + layout */
@media (max-width: 1023px) {

    /* Sidebar: Full overlay on mobile */
    .sidebar {
        width: 280px !important;
        z-index: 30 !important;
    }

    /* Hide the sidebar spacer div - ENHANCED FORCE */
    .sidebar-spacer,
    [class*="sidebar-spacer"],
    .w-72.flex-shrink-0,
    .w-64.flex-shrink-0,
    .w-16.flex-shrink-0,
    div[x-bind\:class*="sidebar"] {
        display: none !important;
        width: 0 !important;
        max-width: 0 !important;
        min-width: 0 !important;
        margin: 0 !important;
        padding: 0 !important;
        position: absolute !important;
        pointer-events: none !important;
    }

    /* Main content full width on mobile */
    main {
        width: 100% !important;
        min-width: 100% !important;
        max-width: 100% !important;
        margin-left: 0 !important;
        padding-left: 12px !important;
        padding-right: 12px !important;
    }

    .flex-1.flex.flex-col {
        width: 100% !important;
        min-width: 100% !important;
        max-width: 100% !important;
        margin-left: 0 !important;
        padding-left: 0 !important;
        padding-right: 0 !important;
    }

    /* Reduce main content padding */
    main.p-6,
    main.p-6.lg\:p-8 {
        padding: 4px 12px 12px 12px !important;
        /* Tighten top padding for mobile */
    }

    /* The wrapper <main> emitted by header.php (no class) must NOT inset page
       content — the inner <main class="p-6"> already provides content padding.
       Removing its side padding lets the page container span the full viewport so
       full-width sections (e.g. the footer) reach the screen edges like the header. */
    main:not([class]) {
        padding-left: 0 !important;
        padding-right: 0 !important;
    }

    /* Notification & chat dropdown widths */
    .dropdown-content.w-80 {
        width: 280px !important;
        right: -40px !important;
    }

    .dropdown-content.w-56 {
        width: 220px !important;
    }

    /* Make sure dropdowns don't go off-screen */
    .dropdown-content {
        max-width: calc(100vw - 20px) !important;
    }
}

/* ============================================================
   MAIN CONTENT AREA RESPONSIVE
   ============================================================ */

/* Page header sections (the gradient hero banners used across pages) */
@media (max-width: 640px) {

    .page-header-gradient,
    .dashboard-card-gradient {
        padding: 16px !important;
        border-radius: 12px !important;
    }

    .page-header-gradient h1,
    .dashboard-card-gradient h1 {
        font-size: 1.25rem !important;
        margin-bottom: 4px !important;
    }

    .page-header-gradient p,
    .dashboard-card-gradient p {
        font-size: 0.8rem !important;
    }

    .page-header-gradient .text-3xl,
    .dashboard-card-gradient .text-3xl {
        font-size: 1.25rem !important;
    }

    /* Hide the large decorative icon on mobile */
    .page-header-gradient .hidden.md\:block,
    .dashboard-card-gradient .hidden.md\:block {
        display: none !important;
    }

    .page-header-gradient .flex.items-center.space-x-4 {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 4px !important;
    }

    /* Margin below header */
    .mb-8 {
        margin-bottom: 16px !important;
    }

    /* OVERRIDE: All header navigation buttons - maintain readable size */
    .subjects-header .flex.no-stack a,
    .assignment-header .flex.no-stack a,
    .assignment-details-header .flex.no-stack a,
    .edit-assignment-header .flex.no-stack a,
    .timetable-header .flex.no-stack a {
        padding: 10px 16px !important;
        font-size: 14px !important;
        line-height: 20px !important;
        background-color: #3b82f6 !important;
        color: white !important;
        border-radius: 0.5rem !important;
        text-decoration: none !important;
        transition: background-color 0.2s !important;
    }

    .subjects-header .flex.no-stack a:hover,
    .assignment-header .flex.no-stack a:hover,
    .assignment-details-header .flex.no-stack a:hover,
    .edit-assignment-header .flex.no-stack a:hover,
    .timetable-header .flex.no-stack a:hover {
        background-color: #2563eb !important;
    }

    .subjects-header .flex.no-stack a i,
    .assignment-header .flex.no-stack a i,
    .assignment-details-header .flex.no-stack a i,
    .edit-assignment-header .flex.no-stack a i,
    .timetable-header .flex.no-stack a i {
        margin-right: 6px !important;
        font-size: 14px !important;
        color: white !important;
    }

    /* Timetable Management Header - Button stays horizontal under title */
    .timetable-header {
        display: block !important;
    }

    .timetable-header h1 {
        margin-bottom: 12px !important;
    }

    .timetable-header .flex.no-stack {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: wrap !important;
        gap: 8px !important;
        align-items: center !important;
    }

    /* Timetable action buttons - horizontal layout */
    .timetable-header .flex.space-x-2 {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: wrap !important;
        gap: 8px !important;
        margin: 0 !important;
    }

    .timetable-header .flex.space-x-2 > * + * {
        margin-left: 0 !important;
    }

    .timetable-header .flex.space-x-2 button {
        padding: 8px 12px !important;
        font-size: 0.75rem !important;
        white-space: nowrap !important;
    }

    .timetable-header .flex.space-x-2 button i {
        margin-right: 4px !important;
        font-size: 0.75rem !important;
    }

    /* Form action buttons - keep horizontal on mobile */
    .form-buttons.flex.no-stack {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        gap: 10px !important;
        align-items: center !important;
        justify-content: flex-end !important;
    }

    .form-buttons.flex.no-stack a,
    .form-buttons.flex.no-stack button {
        padding: 10px 20px !important;
        font-size: 14px !important;
        white-space: nowrap !important;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
    }

    .form-buttons.flex.no-stack button i {
        margin-right: 6px !important;
    }
}

@media (min-width: 641px) and (max-width: 768px) {

    .page-header-gradient,
    .dashboard-card-gradient {
        padding: 20px !important;
    }

    .page-header-gradient h1,
    .dashboard-card-gradient h1,
    .page-header-gradient .text-3xl,
    .dashboard-card-gradient .text-3xl {
        font-size: 1.5rem !important;
    }
}

/* ============================================================
   DASHBOARD CARDS / STAT CARDS RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {

    /* Stats grid: 2 columns on mobile */
    .grid.grid-cols-1.sm\:grid-cols-2.lg\:grid-cols-4,
    .grid.grid-cols-2.md\:grid-cols-4,
    .grid.grid-cols-1.md\:grid-cols-2.lg\:grid-cols-4,
    .grid.grid-cols-1.md\:grid-cols-4 {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 8px !important;
    }

    /* Dashboard stat cards - smaller on mobile */
    .grid .bg-white.rounded-lg,
    .grid .bg-white.rounded-xl,
    .grid .bg-white.dark\:bg-gray-800 {
        padding: 12px !important;
    }

    .grid .text-2xl,
    .grid .text-3xl {
        font-size: 1.25rem !important;
    }

    .grid .text-4xl {
        font-size: 1.5rem !important;
    }

    /* Student cards: 1 column on mobile */
    .grid.grid-cols-1.md\:grid-cols-2.lg\:grid-cols-3 {
        grid-template-columns: 1fr !important;
        gap: 12px !important;
    }
}

@media (min-width: 641px) and (max-width: 1023px) {

    /* Stats grid: 2 columns on tablet */
    .grid.grid-cols-1.sm\:grid-cols-2.lg\:grid-cols-4,
    .grid.grid-cols-2.md\:grid-cols-4,
    .grid.grid-cols-1.md\:grid-cols-2.lg\:grid-cols-4 {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    /* Student cards: 2 columns on tablet */
    .grid.grid-cols-1.md\:grid-cols-2.lg\:grid-cols-3 {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

/* ============================================================
   TABLES RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {

    /* Make tables horizontally scrollable */
    .overflow-x-auto {
        display: block !important;
        width: 100% !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
    }

    table {
        display: table !important;
        width: 100% !important;
        min-width: 600px;
    }

    /* Smaller table text/padding on mobile */
    table th,
    table td {
        padding: 8px 10px !important;
        font-size: 0.75rem !important;
        white-space: nowrap;
    }

    /* Ensure table has full width layout inside cards */
    .bg-white table,
    .dark\:bg-gray-800 table {
        display: table !important;
        width: 100% !important;
    }
}

/* ============================================================
   FORMS RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {

    /* Stack form grids */
    .grid.grid-cols-1.md\:grid-cols-2,
    .grid.grid-cols-1.md\:grid-cols-3,
    .grid.grid-cols-1.md\:grid-cols-4,
    .grid.grid-cols-2.md\:grid-cols-4,
    form .grid {
        grid-template-columns: 1fr !important;
        gap: 8px !important;
    }

    /* Full-width inputs */
    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="number"],
    input[type="date"],
    input[type="tel"],
    input[type="url"],
    input[type="search"],
    select,
    textarea {
        width: 100% !important;
        font-size: 16px !important;
        /* Prevent iOS zoom on focus */
    }

    /* Stack button groups */
    .flex.space-x-3:not(header *):not(.sidebar *):not(#sidebar *):not(table *):not(footer *):not(.text-gray-600):not(.breadcrumbs *):not(.breadcrumb *):not(.no-stack),
    .flex.space-x-2:not(header *):not(.sidebar *):not(#sidebar *):not(table *):not(footer *):not(.text-gray-600):not(.breadcrumbs *):not(.breadcrumb *):not(.no-stack),
    .flex.space-x-4:not(header *):not(.sidebar *):not(#sidebar *):not(table *):not(footer *):not(.text-gray-600):not(.breadcrumbs *):not(.breadcrumb *):not(.no-stack) {
        flex-direction: column !important;
        align-items: stretch !important;
        flex-wrap: wrap !important;
        gap: 8px !important;
    }

    [class*="space-x-"]:not(header *):not(.sidebar *):not(#sidebar *):not(table *):not(footer *):not(.text-gray-600):not(.breadcrumbs *):not(.breadcrumb *):not(.no-stack)>*+* {
        margin-left: 0 !important;
    }

    /* Full-width buttons on mobile */
    .flex.justify-end.items-center.mb-6 {
        flex-direction: column !important;
        align-items: stretch !important;
    }

    .flex.justify-end.items-center.mb-6 .flex {
        flex-direction: column !important;
    }

    .flex.justify-end.items-center.mb-6 a,
    .flex.justify-end.items-center.mb-6 button {
        width: 100% !important;
        text-align: center !important;
        display: flex !important;
        justify-content: center !important;
        align-items: center !important;
        padding: 10px !important;
        white-space: nowrap !important;
        font-size: 0.875rem !important;
    }

    /* Subjects Management Header - Buttons stay horizontal under title */
    .subjects-header {
        display: block !important;
    }

    .subjects-header h1 {
        margin-bottom: 12px !important;
    }

    .subjects-header .flex.no-stack {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        gap: 8px !important;
        align-items: center !important;
    }

    .subjects-header .flex.no-stack a {
        padding: 10px 14px !important;
        font-size: 0.875rem !important;
        white-space: nowrap !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
    }

    .subjects-header .flex.no-stack a i {
        margin-right: 6px !important;
        font-size: 0.875rem !important;
    }

    /* Assignment Management Header - Buttons stay horizontal under title */
    .assignment-header {
        display: block !important;
    }

    .assignment-header h1 {
        margin-bottom: 12px !important;
    }

    .assignment-header .flex.no-stack {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        gap: 8px !important;
        align-items: center !important;
    }

    .assignment-header .flex.no-stack a {
        padding: 10px 14px !important;
        font-size: 0.875rem !important;
        white-space: nowrap !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
    }

    .assignment-header .flex.no-stack a i {
        margin-right: 6px !important;
        font-size: 0.875rem !important;
    }

    /* Assignment Actions - Keep buttons horizontal on mobile */
    .assignment-actions.flex.no-stack {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: wrap !important;
        gap: 6px !important;
        align-items: center !important;
        justify-content: flex-end !important;
    }

    .assignment-actions.flex.no-stack a,
    .assignment-actions.flex.no-stack button {
        padding: 6px 8px !important;
        font-size: 0.75rem !important;
        white-space: nowrap !important;
    }

    .assignment-actions.flex.no-stack a i {
        font-size: 0.7rem !important;
    }

    .assignment-actions.flex.no-stack form {
        margin: 0 !important;
    }

    /* Assignment Details Header - Buttons stay horizontal under title */
    .assignment-details-header {
        display: block !important;
    }

    .assignment-details-header h1 {
        margin-bottom: 12px !important;
    }

    .assignment-details-header .flex.no-stack {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        gap: 8px !important;
        align-items: center !important;
    }

    .assignment-details-header .flex.no-stack a {
        padding: 10px 14px !important;
        font-size: 0.875rem !important;
        white-space: nowrap !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
    }

    .assignment-details-header .flex.no-stack a i {
        margin-right: 6px !important;
        font-size: 0.875rem !important;
    }

    /* Assignment Card Header - Better mobile layout */
    .bg-gradient-to-r.from-indigo-500.to-purple-600 .flex.justify-between.items-start {
        flex-direction: column !important;
        gap: 0 !important;
    }

    .bg-gradient-to-r.from-indigo-500.to-purple-600 .text-white.flex-grow {
        width: 100% !important;
        margin-bottom: 8px !important;
    }

    .bg-gradient-to-r.from-indigo-500.to-purple-600 h3 {
        font-size: 1rem !important;
        margin-bottom: 8px !important;
    }

    /* Assignment info - display in grid on mobile */
    .bg-gradient-to-r.from-indigo-500.to-purple-600 .flex.flex-wrap.gap-3 {
        display: grid !important;
        grid-template-columns: auto 1fr !important;
        gap: 6px 12px !important;
        font-size: 0.75rem !important;
    }

    .bg-gradient-to-r.from-indigo-500.to-purple-600 .flex.flex-wrap.gap-3 span {
        display: flex !important;
        align-items: center !important;
    }

    /* Status badge - position at top right */
    .bg-gradient-to-r.from-indigo-500.to-purple-600 .flex.flex-col.items-end {
        width: 100% !important;
        flex-direction: row !important;
        justify-content: flex-end !important;
        align-items: center !important;
    }

    .bg-gradient-to-r.from-indigo-500.to-purple-600 .flex.flex-col.items-end .flex.space-x-2 {
        display: flex !important;
        flex-direction: row !important;
    }

    .bg-gradient-to-r.from-indigo-500.to-purple-600 span.px-3.py-1 {
        font-size: 0.7rem !important;
        padding: 4px 8px !important;
        white-space: nowrap !important;
    }

    /* Edit Assignment Header - Buttons stay horizontal under title */
    .edit-assignment-header {
        display: block !important;
    }

    .edit-assignment-header h1 {
        margin-bottom: 12px !important;
    }

    .edit-assignment-header .flex.no-stack {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        gap: 8px !important;
        align-items: center !important;
    }

    .edit-assignment-header .flex.no-stack a {
        padding: 10px 14px !important;
        font-size: 0.875rem !important;
        white-space: nowrap !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
    }

    .edit-assignment-header .flex.no-stack a i {
        margin-right: 6px !important;
        font-size: 0.875rem !important;
    }

    .edit-assignment-header .flex.no-stack a i {
        margin-right: 4px !important;
    }

    /* Class Details Header - Buttons stay horizontal under title */
    .class-details-header {
        display: block !important;
        margin-bottom: 24px !important;
    }

    .class-details-header h1 {
        margin-bottom: 12px !important;
    }

    .class-details-header .flex.no-stack {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        gap: 8px !important;
        align-items: center !important;
    }

    .class-details-header .flex.no-stack a {
        padding: 10px 16px !important;
        font-size: 0.875rem !important;
        white-space: nowrap !important;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        border-radius: 0.5rem !important;
        text-decoration: none !important;
        transition: background-color 0.2s !important;
    }

    /* Edit Class button - blue background */
    .class-details-header .flex.no-stack a.bg-blue-500 {
        background-color: #3b82f6 !important;
        color: white !important;
    }

    .class-details-header .flex.no-stack a.bg-blue-500:hover {
        background-color: #2563eb !important;
    }

    /* Back button - add gray background */
    .class-details-header .flex.no-stack a.text-blue-600 {
        background-color: #e5e7eb !important;
        color: #2563eb !important;
        padding: 10px 16px !important;
    }

    .class-details-header .flex.no-stack a.text-blue-600:hover {
        background-color: #d1d5db !important;
        color: #1d4ed8 !important;
    }

    .class-details-header .flex.no-stack a i {
        margin-right: 6px !important;
        font-size: 0.875rem !important;
    }

    /* Exam Management Header - Buttons stay horizontal under title */
    .exam-management-header {
        display: block !important;
        margin-bottom: 24px !important;
    }

    .exam-management-header h1 {
        margin-bottom: 12px !important;
    }

    .exam-management-header .flex.no-stack {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        gap: 8px !important;
        align-items: center !important;
    }

    .exam-management-header .flex.no-stack a {
        padding: 10px 16px !important;
        font-size: 0.875rem !important;
        white-space: nowrap !important;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        border-radius: 0.5rem !important;
        text-decoration: none !important;
        transition: background-color 0.2s !important;
    }

    /* Schedule New Exam button - blue background */
    .exam-management-header .flex.no-stack a.bg-blue-500 {
        background-color: #3b82f6 !important;
        color: white !important;
    }

    .exam-management-header .flex.no-stack a.bg-blue-500:hover {
        background-color: #2563eb !important;
    }

    /* Back button - add gray background */
    .exam-management-header .flex.no-stack a.text-blue-600 {
        background-color: #e5e7eb !important;
        color: #2563eb !important;
        padding: 10px 16px !important;
    }

    .exam-management-header .flex.no-stack a.text-blue-600:hover {
        background-color: #d1d5db !important;
        color: #1d4ed8 !important;
    }

    .exam-management-header .flex.no-stack a i {
        margin-right: 6px !important;
        font-size: 0.875rem !important;
    }

    /* Exam Results Header - Buttons stay horizontal under title */
    .exam-results-header {
        display: block !important;
        margin-bottom: 24px !important;
    }

    .exam-results-header h1 {
        margin-bottom: 12px !important;
    }

    .exam-results-header .flex.no-stack {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        gap: 8px !important;
        align-items: center !important;
    }

    .exam-results-header .flex.no-stack a {
        padding: 10px 16px !important;
        font-size: 0.875rem !important;
        white-space: nowrap !important;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        border-radius: 0.5rem !important;
        text-decoration: none !important;
        transition: background-color 0.2s !important;
    }

    /* Export Results button - green background */
    .exam-results-header .flex.no-stack a.bg-green-500 {
        background-color: #10b981 !important;
        color: white !important;
    }

    .exam-results-header .flex.no-stack a.bg-green-500:hover {
        background-color: #059669 !important;
    }

    /* Back button - add gray background */
    .exam-results-header .flex.no-stack a.text-blue-600 {
        background-color: #e5e7eb !important;
        color: #2563eb !important;
        padding: 10px 16px !important;
    }

    .exam-results-header .flex.no-stack a.text-blue-600:hover {
        background-color: #d1d5db !important;
        color: #1d4ed8 !important;
    }

    .exam-results-header .flex.no-stack a i {
        margin-right: 6px !important;
        font-size: 0.875rem !important;
    }

    /* Attendance Action Buttons - Keep horizontal on mobile */
    .attendance-action-buttons {
        display: flex !important;
        flex-direction: column !important;
        gap: 12px !important;
        margin-bottom: 24px !important;
    }

    .attendance-action-buttons .flex.no-stack {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        gap: 8px !important;
        width: 100% !important;
    }

    .attendance-action-buttons .flex.no-stack a {
        flex: 1 !important;
        justify-content: center !important;
        padding: 12px 16px !important;
        font-size: 0.875rem !important;
        white-space: nowrap !important;
        text-align: center !important;
    }

    .attendance-action-buttons .export-button-wrapper {
        width: 100% !important;
    }

    .attendance-action-buttons .export-button-wrapper button {
        width: 100% !important;
        justify-content: center !important;
        padding: 10px 16px !important;
    }

    /* Exam List - Hide desktop table, show mobile cards */
    .exam-table-header {
        display: none !important;
    }

    .exam-table-row {
        display: none !important;
    }

    .exam-mobile-card {
        display: block !important;
    }

    /* Mobile card styling enhancements */
    .exam-mobile-card {
        background-color: #ffffff;
        transition: background-color 0.2s;
    }

    .exam-mobile-card:hover {
        background-color: #f9fafb;
    }

    .exam-mobile-card h3 {
        font-size: 1rem !important;
        line-height: 1.3 !important;
    }

    .exam-mobile-card .grid.grid-cols-2 {
        margin-bottom: 12px !important;
    }

    .exam-mobile-card .flex.flex-wrap {
        margin-top: 12px !important;
    }

    .exam-mobile-card .flex.flex-wrap a {
        min-width: 80px !important;
        text-align: center !important;
    }

    /* Assignment Statistics Cards - Force horizontal 2-column layout on mobile */
    main .grid.grid-cols-2.md\:grid-cols-4 {
        display: grid !important;
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px !important;
    }

    /* Make stat cards more compact and vertical layout on mobile */
    main .grid.grid-cols-2.md\:grid-cols-4 > div {
        padding: 12px !important;
        flex-direction: column !important;
        align-items: center !important;
        text-align: center !important;
    }

    main .grid.grid-cols-2.md\:grid-cols-4 .space-x-4 {
        margin-left: 0 !important;
        margin-right: 0 !important;
        gap: 0 !important;
    }

    main .grid.grid-cols-2.md\:grid-cols-4 .space-x-4 > * + * {
        margin-left: 0 !important;
    }

    main .grid.grid-cols-2.md\:grid-cols-4 .p-3 {
        padding: 10px !important;
        margin-bottom: 8px !important;
    }

    main .grid.grid-cols-2.md\:grid-cols-4 .text-xl {
        font-size: 1.1rem !important;
    }

    main .grid.grid-cols-2.md\:grid-cols-4 .text-2xl {
        font-size: 1.5rem !important;
        line-height: 1.2 !important;
    }

    main .grid.grid-cols-2.md\:grid-cols-4 .text-sm {
        font-size: 0.7rem !important;
        margin-bottom: 4px !important;
    }

    main .grid.grid-cols-2.md\:grid-cols-4 .text-xs {
        font-size: 0.65rem !important;
    }
}

/* ============================================================
   FILTERS / SEARCH BAR RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {

    /* Filter forms - stack vertically */
    .bg-white.rounded-lg.shadow.mb-6 form.grid {
        grid-template-columns: 1fr !important;
    }

    .bg-white.rounded-lg.shadow.mb-6 .p-4 {
        padding: 12px !important;
    }
}

/* ============================================================
   FOOTER RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {
    footer .container {
        padding-left: 16px !important;
        padding-right: 16px !important;
        padding-top: 24px !important;
        padding-bottom: 4px !important;
    }

    footer .border-t {
        padding-top: 4px !important;
    }

    footer .border-t .space-y-4>*+* {
        margin-top: 4px !important;
    }

    /* Stack footer grid to single column */
    footer .grid {
        grid-template-columns: 1fr !important;
        gap: 24px !important;
    }

    /* Center footer bottom content */
    footer .flex.flex-col.md\:flex-row {
        text-align: center !important;
    }

    footer .flex.items-center.space-x-4.text-xs {
        justify-content: center !important;
        flex-wrap: wrap !important;
        gap: 4px !important;
    }

    /* Social media icons - center */
    footer .flex.space-x-4 {
        justify-content: center !important;
    }

    /* Hide "Last updated" on very small screens */
    footer .text-xs.text-blue-100 {
        display: none !important;
    }

    /* Footer heading size */
    footer h3 {
        font-size: 1rem !important;
    }

    /* System status boxes */
    footer .flex.items-center.justify-between.p-3 {
        padding: 8px 12px !important;
    }
}

@media (min-width: 641px) and (max-width: 768px) {
    footer .grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 20px !important;
    }
}


/* ============================================================
   MODAL / DIALOG RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {

    /* Search modal */
    .search-overlay .max-w-2xl {
        max-width: 95% !important;
        margin: 10px !important;
    }

    .search-overlay .p-4 {
        padding: 12px !important;
    }

    .search-overlay input {
        font-size: 16px !important;
        /* Prevent iOS zoom */
    }

    /* Any modal popups */
    .fixed.inset-0 .max-w-lg,
    .fixed.inset-0 .max-w-xl,
    .fixed.inset-0 .max-w-2xl,
    .fixed.inset-0 .max-w-3xl,
    .fixed.inset-0 .max-w-4xl {
        max-width: 95vw !important;
        margin: 8px !important;
    }
}

/* ============================================================
   CARD LAYOUTS RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {

    /* Cards general */
    .rounded-2xl {
        border-radius: 12px !important;
    }

    .rounded-xl {
        border-radius: 10px !important;
    }

    /* Card padding reduction */
    .p-8 {
        padding: 16px !important;
    }

    .p-6 {
        padding: 12px !important;
    }

    /* Shadow reduction for performance */
    .shadow-xl {
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1) !important;
    }

    .shadow-2xl {
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1) !important;
    }
}

/* ============================================================
   CHARTS / CANVAS RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    canvas {
        max-width: 100% !important;
        height: auto !important;
    }

    /* Chart containers */
    .chart-container,
    [style*="height: 300px"],
    [style*="height: 400px"] {
        height: 200px !important;
    }
}

/* ============================================================
   TYPOGRAPHY RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {
    .text-3xl {
        font-size: 1.5rem !important;
    }

    .text-2xl {
        font-size: 1.25rem !important;
    }

    .text-xl {
        font-size: 1.1rem !important;
    }

    .text-lg {
        font-size: 1rem !important;
    }
}

/* ============================================================
   NOTIFICATION / ALERTS RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {
    .notification {
        max-width: calc(100vw - 32px) !important;
        right: 16px !important;
        left: 16px !important;
    }

    /* Alert boxes */
    .bg-green-100.border,
    .bg-red-100.border,
    .bg-yellow-100.border,
    .bg-blue-100.border {
        padding: 10px 12px !important;
        font-size: 0.8rem !important;
    }
}

/* ============================================================
   PAGINATION RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {
    nav[aria-label="Pagination"] {
        flex-wrap: wrap !important;
        justify-content: center !important;
    }

    nav[aria-label="Pagination"] a {
        padding: 6px 10px !important;
        font-size: 0.75rem !important;
    }
}

/* ============================================================
   SPECIFIC PAGE FIXES
   ============================================================ */

/* Profile page */
@media (max-width: 640px) {
    .profile-header .flex {
        flex-direction: column !important;
        text-align: center !important;
    }

    .profile-header .w-32,
    .profile-header .w-24 {
        width: 80px !important;
        height: 80px !important;
        margin: 0 auto 12px !important;
    }
}

/* Settings page */
@media (max-width: 768px) {
    .settings-tabs {
        flex-direction: column !important;
    }

    .settings-tabs button,
    .settings-tabs a {
        width: 100% !important;
        text-align: left !important;
    }
}

/* Help / Support page */
@media (max-width: 640px) {
    .accordion .p-6 {
        padding: 12px !important;
    }
}

/* ============================================================
   PRINT RESPONSIVE (prevent breaking)
   ============================================================ */
@media print {

    .sidebar,
    .sidebar-overlay,
    header,
    #sidebar-toggle {
        display: none !important;
    }

    main {
        margin: 0 !important;
        padding: 10px !important;
        width: 100% !important;
    }

    .flex.bg-gray-50 {
        margin-top: 0 !important;
    }
}

/* ============================================================
   SIDEBAR RESPONSIVE (additional fixes)
   ============================================================ */
@media (max-width: 1023px) {

    /* Ensure sidebar starts hidden on mobile */
    #sidebar {
        transform: translateX(-100%);
    }

    /* When sidebar is shown on mobile */
    #sidebar.sidebar-open {
        transform: translateX(0) !important;
    }

    /* Sidebar profile section compact on mobile */
    #sidebar .py-6 {
        padding-top: 12px !important;
        padding-bottom: 12px !important;
    }

    #sidebar .w-14.h-14 {
        width: 40px !important;
        height: 40px !important;
    }
}

/* ============================================================
   DASHBOARD SPECIFIC RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {

    /* Welcome banner */
    .dashboard-card-gradient .text-3xl.font-bold {
        font-size: 1.25rem !important;
    }

    .dashboard-card-gradient .text-lg {
        font-size: 0.875rem !important;
    }

    /* Activity lists */
    .space-y-4>div {
        padding: 8px !important;
    }

    /* Quick action buttons in dashboards */
    .grid.grid-cols-2.gap-4,
    .grid.grid-cols-3.gap-4,
    .grid.grid-cols-4.gap-4 {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 8px !important;
    }
}

/* ============================================================
   COMMUNICATION / CHAT RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {

    /* Chat containers */
    .chat-container {
        height: calc(100vh - 200px) !important;
    }

    .chat-messages {
        max-height: calc(100vh - 300px) !important;
    }

    .chat-input {
        flex-direction: column !important;
        gap: 8px !important;
    }
}

/* ============================================================
   UTILITIES - Responsive helpers
   ============================================================ */

/* Hide on mobile */
@media (max-width: 640px) {
    .hide-mobile {
        display: none !important;
    }
}

/* Hide on tablet */
@media (min-width: 641px) and (max-width: 1023px) {
    .hide-tablet {
        display: none !important;
    }
}

/* Show only on mobile */
@media (min-width: 641px) {
    .show-mobile-only {
        display: none !important;
    }
}

/* Full width on mobile */
@media (max-width: 640px) {
    .mobile-full-width {
        width: 100% !important;
    }

    .mobile-stack {
        flex-direction: column !important;
    }

    .mobile-center {
        text-align: center !important;
        justify-content: center !important;
        align-items: center !important;
    }
}

/* ============================================================
   LANDSCAPE PHONE FIX
   ============================================================ */
@media (max-height: 500px) and (orientation: landscape) {
    main {
        padding: 8px !important;
    }
}

/* ============================================================
   SAFE AREA (Notched phones like iPhone X+)
   ============================================================ */
@supports (padding: env(safe-area-inset-bottom)) {
    footer {
        padding-bottom: calc(16px + env(safe-area-inset-bottom)) !important;
    }

    @media (max-width: 640px) {
        footer {
            padding-bottom: env(safe-area-inset-bottom) !important;
        }
    }

    header {
        padding-top: env(safe-area-inset-top) !important;
    }
}

/* ============================================================
   SCROLLBAR MOBILE - Thinner on mobile
   ============================================================ */
@media (max-width: 768px) {
    ::-webkit-scrollbar {
        width: 4px !important;
        height: 4px !important;
    }
}

/* ============================================================
   DARK MODE + RESPONSIVE COMBINED FIXES
   ============================================================ */
@media (max-width: 640px) {

    .dark .bg-white.rounded-lg,
    .dark .bg-white.rounded-xl {
        background-color: #1e293b !important;
    }

    .dark .bg-gray-50 {
        background-color: #0f172a !important;
    }
}

/* Outlines and focus rings reset for polished mobile look */
header button:focus,
header button:active,
header .dropdown button:focus,
header .dropdown button:active,
#sidebar-toggle:focus,
#sidebar-toggle:active {
    outline: none !important;
    box-shadow: none !important;
}


/* ============================================================
   EXAM LIST - DESKTOP VIEW (Show table, hide mobile cards)
   ============================================================ */
@media (min-width: 641px) {
    /* Show desktop table elements */
    .exam-table-header {
        display: block !important;
    }

    .exam-table-row {
        display: grid !important;
    }

    /* Hide mobile card view */
    .exam-mobile-card {
        display: none !important;
    }

    /* Attendance Action Buttons - Desktop layout */
    .attendance-action-buttons {
        display: flex !important;
        flex-direction: row !important;
        justify-content: space-between !important;
        align-items: center !important;
    }

    .attendance-action-buttons .flex.no-stack {
        width: auto !important;
    }

    .attendance-action-buttons .flex.no-stack a {
        flex: 0 !important;
        padding: 12px 24px !important;
    }

    .attendance-action-buttons .export-button-wrapper {
        width: auto !important;
    }

    .attendance-action-buttons .export-button-wrapper button {
        width: auto !important;
        padding: 8px 16px !important;
    }
}