:root {
    --bg-primary: #121212;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #1f1f1f;
    --bg-glass: rgba(30, 30, 30, 0.75);
    
    --accent: #e53e3e; /* Red accent for dummy mode */
    --accent-glow: rgba(229, 62, 62, 0.5); /* Red glow */
    
    --text-primary: #eaeaea;
    --text-secondary: #9ca3af;
    --text-on-accent: #ffffff;

    --border-color: rgba(255, 255, 255, 0.1);
    --border-focus: var(--accent);
    
    --danger: #f56565; /* Slightly lighter red for danger */
    --danger-hover: #e53e3e;
    --success: #4CAF50;
    --th-color: #9c27b0; /* Purple for TH */

    --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

body {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
    background: linear-gradient(135deg, #000000, #2d3748);
    background-size: 400% 400%;
    animation: gradientBG 20s ease infinite;
    min-height: 100vh;
    overflow-x: hidden;
    color: var(--text-primary);
}

* {
    box-sizing: border-box;
}

.offline-banner {
    display: none;
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #ffc107; /* Yellow/Orange */
    color: #212529; /* Dark text */
    text-align: center;
    padding: 10px;
    font-size: 0.9em;
    font-weight: 600;
    z-index: 11002;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

#update-banner {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--accent);
    color: var(--text-on-accent);
    text-align: center;
    padding: 15px;
    font-weight: 600;
    cursor: pointer;
    z-index: 11001;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    transform: translateY(-100%);
    transition: transform 0.4s ease-in-out;
    /* GPU acceleration for smoother animation */
    will-change: transform;
    backface-visibility: hidden;
}

#update-banner.show {
    transform: translateY(0);
}

.container {
    width: 100%;
    min-height: 100%;
    padding: 20px;
}

.glass-card {
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.header {
    text-align: center;
    margin-bottom: 30px;
    position: relative;
}

.header h1 {
    color: var(--text-primary);
    font-size: 2em;
    margin-bottom: 10px;
}

.header h2, .header h3, h2, h3 {
    color: var(--accent);
    margin-top: 20px;
    margin-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.header p, p {
    color: var(--text-secondary);
    font-size: 1em;
    line-height: 1.6;
}

.header a {
    color: var(--accent);
}

.app-version-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: -5px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.app-version {
    font-size: 1.2em;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.update-prompt-container {
    text-align: center;
    margin: -5px 0 25px 0;
}

.update-prompt-btn {
    background-color: var(--danger);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 500;
    transition: background-color: 0.3s ease, transform 0.2s ease;
}
.update-prompt-btn:hover {
    background-color: var(--danger-hover);
    transform: translateY(-2px);
}

.btn-link {
    background: none;
    border: none;
    color: var(--accent);
    text-decoration: underline;
    cursor: pointer;
    font-size: 0.8em;
    padding: 0;
}

.btn-link:hover {
    color: var(--text-primary);
}

.status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
    border: 1px solid var(--border-color);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9em;
    color: var(--text-secondary);
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--success);
    flex-shrink: 0;
    box-shadow: 0 0 8px var(--success);
}

.status-dot.offline {
    background: var(--danger);
    box-shadow: 0 0 8px var(--danger);
}

.digital-clock {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9em;
    font-weight: 600;
    color: var(--accent);
    background: rgba(0, 0, 0, 0.2);
    padding: 5px 10px;
    border-radius: 5px;
}

.dashboard .header .digital-clock {
    position: absolute;
    top: 0;
    left: 0;
}

.active-users-section {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    padding: 12px 15px;
    margin-bottom: 20px;
    text-align: center;
    font-size: 0.9em;
    color: var(--text-secondary);
    font-weight: 500;
}

.login-container {
    max-width: 450px;
    margin: 50px auto;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9em;
}

.input-group input, .input-group select, .input-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1em;
    background: var(--bg-tertiary);
    transition: all 0.3s ease;
    color: var(--text-primary);
}

.input-group input:focus, .input-group select:focus, .input-group textarea:focus {
    outline: none;
    border-color: var(--border-focus);
    background: var(--bg-secondary);
    box-shadow: 0 0 10px var(--accent-glow);
}

.input-group select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

#studentSearchInput {
    margin-bottom: 10px;
}

.btn {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    color: var(--text-on-accent);
    border: none;
    border-radius: 10px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 10px rgba(0,0,0,0);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 15px var(--accent), 0 0 25px var(--accent-glow);
}

.btn:disabled {
    background: #333;
    color: #666;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--accent);
    color: var(--accent);
}

.btn-secondary:hover {
    background: var(--accent);
    color: var(--text-on-accent);
    box-shadow: 0 0 15px var(--accent), 0 0 25px var(--accent-glow);
}

.btn-small {
    width: auto;
    padding: 8px 16px;
    font-size: 0.9em;
}

.btn-danger {
    background: transparent;
    border: 2px solid var(--danger);
    color: var(--danger);
}

.btn-danger:hover {
    background: var(--danger);
    color: var(--text-primary);
    box-shadow: 0 0 15px var(--danger);
}

.action-buttons {
    display: flex;
    gap: 5px;
    align-items: center;
    justify-content: center;
}

.btn-icon {
    background: transparent;
    border: 2px solid var(--text-secondary);
    cursor: pointer;
    font-size: 1em;
    padding: 4px 8px;
    line-height: 1;
    color: var(--text-secondary);
    font-weight: bold;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.btn-icon:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: scale(1.1);
}

.btn-icon:disabled {
    cursor: not-allowed;
    border-color: #333;
    color: #555;
    transform: none;
    opacity: 1;
}

.role-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 25px;
}

.role-card {
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid var(--border-color);
}

.role-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
    border-color: var(--accent);
}

.role-card.active {
    border-color: var(--accent);
    background: var(--accent-glow);
}

.role-card h3 {
    margin: 10px 0 5px 0;
    color: var(--text-primary);
    border: none;
    padding: 0;
}

.role-card p {
    margin: 0;
    font-size: 0.85em;
    color: var(--text-secondary);
}

.dashboard {
    display: none;
}

.dashboard.active {
    display: block;
}

.nav-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.nav-tab {
    padding: 12px 24px;
    background: var(--bg-tertiary);
    border: none;
    border-radius: 10px;
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.nav-tab:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.nav-tab.active {
    background: var(--accent);
    color: var(--text-on-accent);
    box-shadow: 0 0 10px var(--accent-glow);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.data-table {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    overflow-x: auto;
    margin-top: 20px;
    border: 1px solid var(--border-color);
}

.data-table table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th, .data-table td {
    padding: 12px 15px;
    vertical-align: middle;
    word-break: break-word;
}

.data-table th:nth-child(2), .data-table td:nth-child(2) {
    white-space: nowrap;
}

.data-table th {
    background: rgba(229, 62, 62, 0.1);
    color: var(--accent);
    text-align: left;
    font-weight: 600;
}

.data-table td {
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table th:first-child, .data-table td:first-child {
    width: 1%;
    text-align: center;
}

.data-table tr:hover {
    background: rgba(229, 62, 62, 0.05);
}

/* Elakkan pembalutan teks dalam jadual admin */
#adminDashboard .data-table th,
#adminDashboard .data-table td {
    white-space: nowrap;
}

.admin-controls {
    background: rgba(0,0,0,0.2);
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.admin-controls .input-group {
    margin-bottom: 0;
}

.month-nav {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin: 20px 0;
}

.month-nav button {
    padding: 8px 16px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.month-nav button:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.month-display {
    font-size: 1.2em;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 150px;
    text-align: center;
}

.suggestion-box {
    margin-top: 30px;
}

.suggestion-item {
    background: var(--bg-tertiary);
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: start;
    gap: 15px;
    border: 1px solid var(--border-color);
}

.suggestion-text {
    flex: 1;
    color: var(--text-primary);
}
.suggestion-text small {
    color: var(--text-secondary);
}

/* Toast Notifications */
#toastContainer {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 11000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: calc(100% - 40px);
    max-width: 350px;
}

.toast {
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast-success {
    background: var(--success);
    box-shadow: 0 0 10px var(--success);
}

.toast-error {
    background: var(--danger);
    box-shadow: 0 0 10px var(--danger);
}

.toast-btn {
    background: rgba(0,0,0,0.2);
    color: white;
    border: 1px solid white;
    padding: 8px 12px;
    margin-left: 15px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.2s;
}

.toast-btn:hover {
    background: rgba(0,0,0,0.4);
}

.loading {
    display: none;
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
}

.loading.show {
    display: block;
}

.spinner {
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top: 3px solid var(--accent);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.filter-grid {
    display: grid;
    gap: 20px;
    grid-template-columns: 1fr 1fr 1fr 1fr;
}

.unit-description-box {
    background: rgba(229, 62, 62, 0.05);
    border-left: 4px solid var(--accent);
    padding: 15px;
    margin-top: 20px;
    border-radius: 0 8px 8px 0;
    color: var(--text-secondary);
    font-size: 0.95em;
    line-height: 1.5;
    display: none;
}

.teacher-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 10px;
    margin-bottom: 20px;
}

.teacher-btn {
    padding: 15px 10px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-secondary);
    font-weight: 600;
    text-align: center;
    font-size: 0.9em;
    touch-action: manipulation; /* Eliminate 300ms click delay on touch devices */
}

.teacher-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.teacher-btn.selected {
    background: var(--accent);
    color: var(--text-on-accent);
    border-color: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
}

.drag-handle {
    cursor: grab;
    padding: 0 10px;
    font-size: 1.2em;
    color: var(--text-secondary);
}

.sortable-ghost {
    opacity: 0.4;
    background: var(--accent-glow);
}

.sortable-chosen {
    background: rgba(229, 62, 62, 0.1);
}

.mobile-report-warning {
    display: none;
}

.maintenance-card {
    background: rgba(229, 115, 115, 0.1);
    border: 2px solid var(--danger);
    border-radius: 15px;
    padding: 40px;
    text-align: center;
    margin-top: 20px;
}

.report-content-wrapper {
    display: block;
}

.save-tick {
    color: var(--success);
    font-weight: bold;
    margin-left: 8px;
    opacity: 0;
    transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out;
    display: inline-block;
    transform: scale(0.8);
}

.save-tick.show {
    opacity: 1;
    transform: scale(1.2);
}

.ios-install-banner {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(26, 26, 26, 0.9);
    color: var(--text-primary);
    padding: 15px 50px 15px 15px;
    z-index: 12000;
    font-size: 0.9em;
    line-height: 1.4;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.ios-install-close {
    position: absolute;
    top: 50%;
    right: 15px;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
}

.system-backup-section {
    background-color: var(--bg-tertiary);
    padding: 20px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.warning-text {
    background: rgba(229, 115, 115, 0.1);
    border-left: 4px solid var(--danger);
    padding: 10px;
    border-radius: 4px;
    margin: 15px 0;
    color: var(--text-secondary);
}

.warning-text strong {
    color: var(--danger);
}

tr.ungraded {
    border-left: 3px solid #ffca28; /* Orange color */
    background: rgba(255, 202, 40, 0.05) !important;
}

.th-reset-link {
    font-size: 0.8em;
    font-weight: normal;
    margin-left: 8px;
    color: var(--danger);
    cursor: pointer;
    text-decoration: underline;
    opacity: 0.8;
}

.th-reset-link:hover {
    color: var(--danger-hover);
    opacity: 1;
}

.tp-button.reset-all {
    flex: 1 1 100%; /* Make it wider */
    background-color: transparent;
    border: 1px solid var(--danger);
    color: var(--danger);
    margin-top: 8px;
}
.tp-button.reset-all:hover {
    background-color: var(--danger);
    color: var(--text-primary);
}

.progress-bar-container {
    width: 100%;
    height: 10px;
    background-color: var(--bg-tertiary);
    border-radius: 5px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.progress-bar-fill {
    height: 100%;
    background-color: var(--accent);
    width: 0%;
    border-radius: 5px;
    transition: width 0.5s ease-in-out;
}

.print-main-title {
    display: none;
}


@media (max-width: 992px) {
    .filter-grid {
        grid-template-columns: 1fr 1fr;
    }

    .report-content-wrapper {
        display: none;
    }

    .mobile-report-warning {
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
        background: rgba(229, 115, 115, 0.1);
        border-left: 4px solid var(--danger);
        border-radius: 8px;
        padding: 20px;
        margin-top: 20px;
        color: var(--text-secondary);
    }

    .mobile-report-warning h4 {
        color: var(--danger);
        margin: 0 0 10px 0;
        border: none;
        padding: 0;
    }

    .mobile-report-warning p {
        margin: 0;
        font-size: 0.9em;
        line-height: 1.5;
    }
}

@media (max-width: 768px) {
    .grid-2, .filter-grid, .role-selector {
        grid-template-columns: 1fr;
    }

    #addClassForm .grid-2, #addSkillForm .grid-2 {
        grid-template-columns: 1fr;
    }

    .nav-tabs {
        flex-direction: column;
        gap: 5px;
    }
    
    .nav-tab {
        padding: 12px 18px;
    }

    .header h1 {
        font-size: 1.5em;
    }

    .digital-clock {
        font-size: 0.8em;
    }
    .dashboard .header .digital-clock {
        position: relative;
        margin-bottom: 15px;
        display: inline-block;
    }

    /* START: Mobile Performance Optimizations */
    body {
        animation: none; /* Disable expensive background animation on mobile */
    }

    .glass-card,
    #loadingOverlay,
    .modal-overlay,
    .changelog-modal-overlay {
        backdrop-filter: none; /* Disable blur for performance */
        -webkit-backdrop-filter: none;
    }
    
    .glass-card {
        background: rgba(26, 26, 26, 0.95); /* Use solid background instead of glass effect */
    }
    /* END: Mobile Performance Optimizations */

    /* START: Table responsiveness fixes */
    .data-table th, .data-table td {
        padding: 10px 5px; /* Reduced padding for more space */
        font-size: 0.8em; /* Reduced font size */
        white-space: normal;
        text-align: center;
        vertical-align: middle;
    }

    .data-table th {
        text-align: center;
        word-break: break-word; /* Allow long headers to wrap */
    }
    
    /* Keep student names left-aligned, but allow them to wrap */
    .data-table td:nth-child(2), .data-table th:nth-child(2) {
         text-align: left;
         min-width: 120px; /* Give name column enough space */
    }
    
    /* END: Table responsiveness fixes */
    
    /* START: PBD Data Entry Card View for Mobile */
    #pbdTableContainer .data-table {
        overflow: visible;
    }

    #pbdTableContainer .data-table table,
    #pbdTableContainer .data-table thead,
    #pbdTableContainer .data-table tbody,
    #pbdTableContainer .data-table th,
    #pbdTableContainer .data-table td,
    #pbdTableContainer .data-table tr {
        display: block;
    }

    #pbdTableContainer .data-table thead {
        display: none;
    }

    #pbdTableContainer .data-table tr {
        margin-bottom: 15px;
        padding: 15px;
        background: var(--bg-tertiary);
        border: 1px solid var(--border-color);
        border-radius: 10px;
        transition: border-left 0.3s ease;
    }
    
    #pbdTableContainer tr.ungraded {
        border-left: 3px solid #ffca28;
    }

    #pbdTableContainer .data-table td {
        border: none;
        padding: 10px 0 0 0;
        text-align: left;
        white-space: normal;
    }

    #pbdTableContainer .data-table td:first-child {
        display: none;
    }

    #pbdTableContainer .data-table td:nth-of-type(2) {
        font-weight: 600;
        font-size: 1.1em;
        color: var(--text-primary);
        margin-bottom: 10px;
        padding-bottom: 10px;
        border-bottom: 1px solid var(--border-color);
    }
    /* END: PBD Data Entry Card View for Mobile */

    .tp-button-group {
        display: flex;
        justify-content: space-between;
        gap: 5px;
        margin-top: 10px;
        flex-wrap: wrap;
    }
    
    .tp-button {
        flex: 1;
        min-width: 44px;
        height: 44px;
        border-radius: 8px;
        border: 1px solid var(--border-color);
        background-color: var(--bg-tertiary);
        color: var(--text-secondary);
        font-weight: bold;
        font-size: 1.1em;
        cursor: pointer;
        transition: all 0.2s ease;
        display: flex;
        justify-content: center;
        align-items: center;
    }
    
    .tp-button:hover {
        border-color: var(--accent);
        color: var(--accent);
    }
    
    .tp-button.active {
        transform: scale(1.05);
        box-shadow: 0 0 10px var(--accent-glow);
    }

    .tp-button.active[data-tp-value="1"],
    .tp-button.active[data-tp-value="2"] {
        background-color: #f56565;
        border-color: #f56565;
        color: white;
    }
    
    .tp-button.active[data-tp-value="3"],
    .tp-button.active[data-tp-value="4"] {
        background-color: #ffca28;
        border-color: #ffca28;
        color: #121212;
    }
    
    .tp-button.active[data-tp-value="5"],
    .tp-button.active[data-tp-value="6"] {
        background-color: var(--success);
        border-color: var(--success);
        color: white;
    }

    .tp-button.th-btn {
        background-color: transparent;
        border-color: var(--th-color);
        color: var(--th-color);
    }

    .tp-button.active[data-tp-value="TH"] {
        background-color: var(--th-color);
        border-color: var(--th-color);
        color: white;
        box-shadow: 0 0 10px var(--th-color);
    }

    #adminDashboard .data-table th,
    #adminDashboard .data-table td {
        white-space: nowrap;
    }

    /* Penjajaran Khas untuk Jadual Papan Pemuka Admin pada Paparan Mudah Alih */
    #studentListTable td:nth-child(3),
    #studentListTable th:nth-child(3) {
        text-align: left;
    }

    #systemLog .data-table td,
    #systemLog .data-table th {
        text-align: left;
        padding-left: 8px;
    }
}

.top-bar {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    gap: 10px;
}

.logout-btn, .change-level-btn {
    padding: 10px 20px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.logout-btn {
    background: var(--bg-tertiary);
    color: var(--danger);
    border: 2px solid var(--danger);
}

.logout-btn:hover {
    background: var(--danger);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 0 15px var(--danger);
}

.change-level-btn {
    background: var(--bg-tertiary);
    color: var(--accent);
    border: 2px solid var(--accent);
}

.change-level-btn:hover {
    background: var(--accent);
    color: var(--text-on-accent);
    transform: translateY(-2px);
    box-shadow: 0 0 15px var(--accent);
}


#loadingOverlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    z-index: 9999;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    display: none; /* Changed from flex to none */
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    backdrop-filter: blur(5px);
}

#loadingOverlay.show {
    display: flex; /* Display is controlled by .show */
    opacity: 1;
    pointer-events: auto;
}

#loadingOverlay .spinner {
    border-top-color: var(--accent);
    width: 50px;
    height: 50px;
}

#loadingOverlay p {
    color: var(--text-primary);
    margin-top: 20px;
    font-size: 1.2em;
    font-weight: 600;
}

.modal-overlay, .changelog-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 10000;
    display: none;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(5px);
    opacity: 0;
    transition: opacity 0.3s ease;
}
.modal-overlay.show, .changelog-modal-overlay.show {
    display: flex;
    opacity: 1;
}
.modal-content, .changelog-modal-content {
    background: var(--bg-secondary);
    padding: 30px;
    border-radius: 15px;
    max-width: 500px;
    width: 90%;
    box-shadow: 0 5px 25px rgba(0,0,0,0.25);
    color: var(--text-primary);
    position: relative;
    border: 1px solid var(--border-color);
    /* GPU acceleration for smoother rendering */
    will-change: transform, opacity;
    backface-visibility: hidden;
    transform: translateZ(0);
}
.modal-close, .changelog-modal-close {
    position: absolute;
    top: 10px;
    right: 15px;
    background: transparent;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-secondary);
    line-height: 1;
    transition: color 0.2s ease;
}
.modal-close:hover, .changelog-modal-close:hover {
    color: var(--text-primary);
}

.modal-content h3, .changelog-modal-content h3 {
    margin-top: 0;
    margin-bottom: 20px;
    color: var(--accent);
    font-size: 1.5em;
    text-align: center;
    border: none;
    padding-bottom: 0;
}
.changelog-modal-content p {
    line-height: 1.6;
    margin-bottom: 20px;
    background: var(--bg-tertiary);
    padding: 10px;
    border-radius: 8px;
    color: var(--text-secondary);
}

/* Laporan PBD Table Specific Styles */
#report-card {
    contain: content; /* Fix for flickering/layout shifting */
}

#report-card .data-table th,
#report-card .data-table td {
    border-right: 1px solid var(--border-color);
}
#report-card .data-table th:last-child,
#report-card .data-table td:last-child {
    border-right: none;
}

#report-card .data-table th:nth-child(1), /* Tarikh */
#report-card .data-table td:nth-child(1),
#report-card .data-table th:nth-child(3), /* Subjek */
#report-card .data-table td:nth-child(3),
#report-card .data-table th:nth-child(4), /* Unit */
#report-card .data-table td:nth-child(4) {
    text-align: left;
}

#report-card .data-table td:nth-child(1) {
    white-space: nowrap;
}

#report-card .data-table th:nth-child(5), /* TP */
#report-card .data-table td:nth-child(5) {
    text-align: center;
}


/* Print-specific styles */
@media print {
    @page {
        size: landscape;
        margin: 0.5in;
    }

    body.print-view {
        background: #fff !important;
        color: #000 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    
    .mobile-report-warning {
        display: none !important;
    }

    .report-content-wrapper {
        display: block !important;
    }

    /* Hide all non-printable elements by default */
    body.print-view > *:not(.container),
    .container > *:not(.dashboard),
    .dashboard > *:not(.glass-card),
    .glass-card > *:not(#studentAnalysis):not(#adminReport),
    .top-bar, .header, .status-bar, .nav-tabs, 
    #recordPBD, #customize, #users, #classes, #curriculum, #suggestions,
    #studentAnalysis > h3, #studentAnalysis .filter-grid, #analysisLoading, #reportActionButtons,
    #adminReport > h3, #adminReport .filter-grid, #adminAnalysisLoading, #adminReportActionButtons {
        display: none !important;
    }
    
    /* Reset styles for printable containers */
    body.print-view,
    body.print-view .container,
    body.print-view .dashboard,
    body.print-view .glass-card,
    body.print-view .tab-content {
        display: block !important;
        background: none !important;
        border: none !important;
        box-shadow: none !important;
        padding: 0 !important;
        margin: 0 !important;
        backdrop-filter: none !important;
        overflow: visible !important;
    }

    /* Ensure the specific report card is visible */
    body.print-view #report-card,
    body.print-view #adminReportCard {
        display: block !important;
        margin: 0 !important;
    }
    
    /* Style the report content for printing */
    body.print-view #reportHeader,
    body.print-view #adminReportHeader {
        display: block !important;
        margin-bottom: 20px !important;
    }
    
    body.print-view #reportHeader *,
    body.print-view #adminReportHeader * {
        color: #000 !important;
        text-align: left !important;
        border: none !important;
        padding: 0 !important;
        margin: 2px 0 !important;
    }

    body.print-view .data-table {
        overflow: visible !important;
        background: none !important;
        border: 1px solid #000 !important;
        margin: 0 !important;
    }

    body.print-view .data-table table {
        width: 100% !important;
        border-collapse: collapse !important;
        font-size: 10pt !important;
    }

    body.print-view .data-table th,
    body.print-view .data-table td {
        border: 1px solid #000 !important;
        color: #000 !important;
        background: #fff !important;
        padding: 8px !important;
    }

    body.print-view .data-table th {
        background: #eee !important;
        font-weight: bold !important;
    }

    body.print-view thead {
        display: table-header-group !important;
    }
    
    body.print-view tr {
        page-break-inside: avoid !important;
    }

    .print-main-title {
        display: block !important;
        text-align: center;
        font-size: 24px;
        font-weight: bold;
        margin-bottom: 20px !important;
        text-decoration: underline;
    }

    /* Specific column wrapping rules for print */
    body.print-view .data-table td:nth-child(1), /* Tarikh */
    body.print-view .data-table td:nth-child(2), /* Nama Murid */
    body.print-view .data-table td:nth-child(3), /* Subjek */
    body.print-view .data-table td:nth-child(5) { /* TP */
        white-space: nowrap !important;
    }
    
    body.print-view .data-table td:nth-child(4) { /* Unit (SP) */
        white-space: normal !important;
        word-break: break-word !important;
    }
}

/* -- Offline Sync Indicator -- */
.sync-icon {
    display: inline-block;
    margin-left: 8px;
    font-size: 1.2em;
    color: #FFC107; /* Yellow */
    animation: pulse 2s infinite;
}

.sync-icon::before {
    content: '\\2601'; /* Unicode for cloud */
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.7; }
    50% { transform: scale(1.1); opacity: 1; }
    100% { transform: scale(1); opacity: 0.7; }
}

/* -- Skeleton Loader -- */
@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

.skeleton-placeholder {
    animation: shimmer 2s linear infinite forwards;
    background: linear-gradient(to right, var(--bg-tertiary) 8%, #333 18%, var(--bg-tertiary) 33%);
    background-size: 2000px 100%;
    border-radius: 4px;
    height: 24px;
}

.skeleton-row td:nth-child(1) .skeleton-placeholder { width: 40%; margin: auto; }
.skeleton-row td:nth-child(2) .skeleton-placeholder { width: 80%; }
.skeleton-row td:nth-child(3) .skeleton-placeholder { height: 45px; } /* Mimics select box */

@media (max-width: 768px) {
    #pbdTableContainer .data-table tr.skeleton-row {
        padding: 15px;
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    #pbdTableContainer .data-table tr.skeleton-row td {
        border: none;
        padding: 0;
        display: block;
    }
    #pbdTableContainer .data-table tr.skeleton-row td:nth-child(1) {
        display: none;
    }
    #pbdTableContainer .data-table tr.skeleton-row td:nth-child(2) {
        padding-bottom: 0;
        margin-bottom: 0;
        border-bottom: none;
    }
    #pbdTableContainer .data-table tr.skeleton-row td:nth-child(2) .skeleton-placeholder {
        width: 60%;
        height: 28px;
        margin-bottom: 5px;
    }
    #pbdTableContainer .data-table tr.skeleton-row td:nth-child(3) {
        padding-top: 0;
    }
    #pbdTableContainer .data-table tr.skeleton-row td:nth-child(3) .skeleton-placeholder {
        height: 48px;
        width: 100%;
    }
}