/* ============================================
   EduAdmin Pro - Responsive Design
   Mobile First Approach
   ============================================ */

/* ============================================
   Extra Small Devices (phones, < 576px)
   ============================================ */
@media screen and (max-width: 575.98px) {
    :root {
        --space-lg: 16px;
        --space-xl: 24px;
    }

    .page-content {
        padding: var(--space-md);
        padding-bottom: calc(var(--bottom-nav-height) + 20px);
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .page-header-right {
        width: 100%;
        display: flex;
        gap: 8px;
    }

    .page-header-right .btn {
        flex: 1;
        font-size: var(--font-xs);
        padding: 8px 12px;
    }

    .stats-row {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .stat-card {
        padding: 12px;
    }

    .stat-card .stat-icon {
        width: 36px;
        height: 36px;
    }

    .stat-info h4 {
        font-size: var(--font-xl);
    }

    .stat-info p {
        font-size: 10px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .auth-container {
        padding: 16px;
    }

    .auth-card {
        padding: 24px 16px;
    }

    .auth-card h1 {
        font-size: var(--font-xl);
    }

    .menu-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .menu-card {
        padding: 16px 12px;
    }

    .menu-card .menu-icon {
        width: 48px;
        height: 48px;
        font-size: 22px;
    }

    .menu-card .menu-title {
        font-size: var(--font-sm);
    }

    .menu-card .menu-desc {
        display: none;
    }

    .modul-grid,
    .soal-grid,
    .kuis-grid,
    .game-grid {
        grid-template-columns: 1fr;
    }

    .table-container {
        font-size: var(--font-xs);
    }

    .table th,
    .table td {
        padding: 8px 6px;
    }

    .attendance-btn-group {
        flex-wrap: wrap;
        gap: 4px;
    }

    .attendance-btn-group .btn {
        padding: 4px 6px;
        font-size: 11px;
    }

    .attendance-footer-actions {
        flex-direction: column;
    }

    .attendance-footer-actions .btn {
        width: 100%;
    }

    .prinsip-cards {
        grid-template-columns: 1fr;
    }

    .prinsip-info-grid {
        grid-template-columns: 1fr;
    }

    .alur-flow {
        flex-direction: column;
        align-items: center;
    }

    .alur-arrow {
        transform: rotate(90deg);
    }

    .tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .tab-item {
        padding: 10px 14px;
        font-size: var(--font-sm);
        white-space: nowrap;
    }

    .result-header {
        flex-direction: column;
        gap: 12px;
    }

    .result-actions {
        width: 100%;
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }

    .result-actions .btn {
        flex: 1;
        min-width: 100px;
        font-size: var(--font-xs);
    }

    .modal {
        width: 95%;
        padding: 20px 16px;
        max-height: 90vh;
    }

    .toast-container {
        top: 10px;
        right: 10px;
        left: 10px;
    }

    .toast {
        max-width: 100%;
        font-size: var(--font-xs);
    }

    .checkbox-grid {
        grid-template-columns: 1fr;
    }

    .game-type-grid {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .game-types-showcase {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }

    .game-type-card {
        padding: 8px;
        font-size: 10px;
    }

    .quiz-play-container {
        padding: 12px;
    }

    .quiz-option-btn {
        padding: 10px 12px;
        font-size: var(--font-sm);
    }

    .memory-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 6px;
    }

    .memory-card {
        height: 70px;
        font-size: 10px;
    }

    .face-scan-container .camera-container {
        height: 250px;
    }

    .student-select-grid {
        grid-template-columns: 1fr;
    }

    .dashboard-welcome h2 {
        font-size: var(--font-lg);
    }

    .history-item {
        padding: 12px;
    }

    .history-stats {
        flex-wrap: wrap;
        gap: 4px;
    }

    .form-section {
        padding: 16px;
    }

    .form-section-header {
        flex-direction: column;
        gap: 8px;
    }

    .section-number {
        width: 28px;
        height: 28px;
        font-size: var(--font-sm);
    }
}

/* ============================================
   Small Devices (landscape phones, 576px - 767px)
   ============================================ */
@media screen and (min-width: 576px) and (max-width: 767.98px) {
    .page-content {
        padding: var(--space-md);
        padding-bottom: calc(var(--bottom-nav-height) + 20px);
    }

    .stats-row {
        grid-template-columns: 1fr 1fr;
    }

    .menu-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .modul-grid,
    .soal-grid,
    .kuis-grid,
    .game-grid {
        grid-template-columns: 1fr 1fr;
    }

    .form-row {
        grid-template-columns: 1fr 1fr;
    }

    .prinsip-info-grid {
        grid-template-columns: 1fr 1fr;
    }

    .game-type-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .memory-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .checkbox-grid {
        grid-template-columns: 1fr 1fr;
    }

    .student-select-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* ============================================
   Medium Devices (tablets, 768px - 991px)
   ============================================ */
   /* ============================================
   FIX: Sidebar Mobile Toggle
   ============================================ */

/* Mobile: sidebar tersembunyi di kiri */
@media screen and (max-width: 991.98px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: var(--sidebar-width, 260px);
        height: 100vh;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 1000;
        box-shadow: none;
    }

    /* Ketika class 'open' ditambahkan */
    .sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.2);
    }

    .main-content {
        margin-left: 0 !important;
    }

    /* Overlay background gelap */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
        opacity: 0;
        transition: opacity 0.3s ease;
    }

    .sidebar-overlay.active {
        display: block;
        opacity: 1;
    }
}

/* Desktop: sidebar selalu tampil */
@media screen and (min-width: 992px) {
    .sidebar {
        transform: translateX(0) !important;
    }

    .topbar .btn-menu {
        display: none;
    }

    .sidebar-overlay {
        display: none !important;
    }
}

@media screen and (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
        position: fixed;
        z-index: 1000;
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.2);
    }

    .main-content {
        margin-left: 0 !important;
    }

    .topbar {
        display: flex !important;
    }

    .bottom-nav {
        display: flex !important;
    }

    .page-content {
        padding-bottom: calc(var(--bottom-nav-height) + 20px);
    }

    /* Overlay when sidebar is open */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }

    .sidebar-overlay.active {
        display: block;
    }
}

@media screen and (min-width: 768px) and (max-width: 991.98px) {
    .stats-row {
        grid-template-columns: repeat(4, 1fr);
    }

    .menu-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .modul-grid,
    .soal-grid,
    .kuis-grid,
    .game-grid {
        grid-template-columns: 1fr 1fr;
    }

    .prinsip-info-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .auth-container {
        max-width: 500px;
        margin: 0 auto;
    }

    .memory-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .game-type-grid {
        grid-template-columns: repeat(5, 1fr);
    }

    .student-select-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

/* ============================================
   Large Devices (desktops, 992px+)
   ============================================ */
@media screen and (min-width: 992px) {
    .sidebar {
        transform: translateX(0);
        display: flex !important;
    }

    .main-content {
        margin-left: var(--sidebar-width);
    }

    .topbar {
        display: flex !important;
    }

    .topbar .btn-menu {
        display: none;
    }

    .bottom-nav {
        display: none !important;
    }

    .page-content {
        padding: var(--space-xl);
    }

    .stats-row {
        grid-template-columns: repeat(4, 1fr);
    }

    .menu-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .modul-grid,
    .soal-grid,
    .kuis-grid,
    .game-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .auth-container {
        max-width: 450px;
        margin: 0 auto;
    }

    .register-card {
        max-width: 600px;
    }

    .create-form-container {
        max-width: 800px;
    }

    .result-container {
        max-width: 900px;
    }

    .memory-grid {
        grid-template-columns: repeat(4, 1fr);
        max-width: 600px;
        margin: 0 auto;
    }

    .quiz-play-container {
        max-width: 700px;
        margin: 0 auto;
    }

    .game-type-grid {
        grid-template-columns: repeat(5, 1fr);
    }

    .student-select-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .face-scan-content {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
}

/* ============================================
   Extra Large Devices (large desktops, 1200px+)
   ============================================ */
@media screen and (min-width: 1200px) {
    .modul-grid,
    .soal-grid,
    .kuis-grid,
    .game-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .menu-grid {
        grid-template-columns: repeat(3, 1fr);
        max-width: 900px;
    }

    .page-content {
        padding: var(--space-xl) var(--space-2xl);
    }
}

/* ============================================
   Common Layout Utilities
   ============================================ */
.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
    gap: 12px;
}

.page-header h2 {
    font-size: var(--font-2xl);
    font-weight: 700;
    margin-bottom: 4px;
}

.page-header p {
    color: var(--text-secondary);
    font-size: var(--font-sm);
}

.page-header-right {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.stats-row {
    display: grid;
    gap: 16px;
    margin-bottom: var(--space-lg);
}

.menu-grid {
    display: grid;
    gap: 16px;
    margin-bottom: var(--space-lg);
}

.modul-grid,
.soal-grid,
.kuis-grid,
.game-grid {
    display: grid;
    gap: 16px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
    gap: 8px;
}

.section-header h3 {
    font-size: var(--font-lg);
    font-weight: 600;
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border);
    flex-wrap: wrap;
}

.attendance-footer-actions {
    display: flex;
    gap: 12px;
    margin-top: var(--space-lg);
    flex-wrap: wrap;
}

.prinsip-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 12px;
    margin-bottom: var(--space-lg);
}

.prinsip-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.prinsip-card strong {
    display: block;
    margin-bottom: 2px;
}

.prinsip-card p {
    font-size: var(--font-xs);
    color: var(--text-secondary);
    margin: 0;
}

.prinsip-info-grid {
    display: grid;
    gap: 16px;
    margin-bottom: var(--space-lg);
}

.prinsip-info-card {
    text-align: center;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
}

.prinsip-info-card .prinsip-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
}

.prinsip-info-card h4 {
    margin-bottom: 4px;
}

.prinsip-info-card p {
    font-size: var(--font-xs);
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.alur-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 20px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.alur-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    font-size: var(--font-sm);
    font-weight: 600;
}

.alur-arrow {
    font-size: var(--font-xl);
    color: var(--text-secondary);
}

.form-section {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: var(--space-lg);
}

.form-section-header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: var(--space-