:root {
    --bg-primary: #0a0e27;
    --bg-secondary: #151932;
    --bg-card: rgba(30, 35, 60, 0.6);
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-success: #10b981;
    --accent-error: #ef4444;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border-color: rgba(148, 163, 184, 0.1);
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #1a1f3a 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
.header {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.logo {
    font-size: clamp(1.5rem, 5vw, 1.75rem);
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.nav-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-btn:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--accent-primary);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.nav-btn.active {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-color: transparent;
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

/* Views */
.view {
    display: none;
}

.view.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.view-header h2 {
    font-size: clamp(1.5rem, 5vw, 2.5rem);
    font-weight: 700;
}

/* Card */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.card:hover {
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-2px);
}

/* Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

/* Project Card */
.project-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.project-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
}

.project-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.project-card .project-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.project-card .delete-btn {
    background: transparent;
    border: 1px solid var(--accent-error);
    color: var(--accent-error);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.project-card .delete-btn:hover {
    background: var(--accent-error);
    color: white;
}

/* Form Elements */
.label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.input,
.textarea,
.select {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.input:focus,
.textarea:focus,
.select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.textarea {
    min-height: 100px;
    resize: vertical;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-secondary:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.btn-secondary.active {
    background: var(--accent-primary);
    color: white;
    border-color: transparent;
}

.btn-group {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

/* Answer Item */
.answer-item {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1rem;
}

.answer-item .input {
    flex: 1;
    margin-bottom: 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* Quiz */
.question-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.question-card h3 {
    font-size: clamp(1.2rem, 4vw, 1.5rem);
    margin-bottom: 1.5rem;
    line-height: 1.4;
}

.answers-grid {
    display: grid;
    gap: 1rem;
}

.answer-option {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.answer-option:hover {
    border-color: var(--accent-primary);
    transform: translateX(4px);
}

.answer-option.selected {
    border-color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.1);
}

.answer-option.correct {
    border-color: var(--accent-success);
    background: rgba(16, 185, 129, 0.1);
}

.answer-option.incorrect {
    border-color: var(--accent-error);
    background: rgba(239, 68, 68, 0.1);
}

/* Quiz Layout Utilities */
.quiz-answers-grid {
    grid-template-columns: 1fr;
    margin-top: 1.5rem;
    gap: 1rem;
}

#quiz-feedback {
    margin-top: 1rem;
}

#next-question-btn {
    margin-top: 1.5rem;
    width: 100%;
}

/* Feedback */
.feedback {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-weight: 500;
}

.feedback.correct {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--accent-success);
    color: var(--accent-success);
}

.feedback.incorrect {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--accent-error);
    color: var(--accent-error);
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(148, 163, 184, 0.05);
}

.upload-area:hover,
.upload-area.active {
    border-color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.1);
}

.upload-area p {
    color: var(--text-secondary);
    margin: 0;
}

.field {
    margin-bottom: 1rem;
}

.nav-btn.admin-only {
    border-color: rgba(139, 92, 246, 0.3);
}

/* Statistics */
.stats-grid {
    display: grid;
    gap: 1rem;
    margin-top: 1.5rem;
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
}

.stat-card h4 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.stat-value {
    font-weight: 600;
    color: var(--text-primary);
}

.progress-bar {
    height: 8px;
    background: var(--bg-primary);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transition: width 0.5s ease;
}

/* Table Styles */
.table-container {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    color: var(--text-primary);
}

.data-table th,
.data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    font-weight: 600;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.02);
}

.data-table tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.data-table td .btn-icon {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: 4px;
    transition: all 0.2s;
}

.data-table td .btn-icon:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

.data-table .status-badge {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 500;
}

.data-table .status-active {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-success);
}

.data-table .status-inactive {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-error);
}

.role-select {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    cursor: pointer;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0.75rem;
        max-width: 100vw;
        overflow-x: hidden;
    }

    .header {
        padding: 1rem;
        margin-bottom: 1.5rem;
        border-radius: 12px;
    }

    .logo {

        margin-bottom: 1rem;
        text-align: center;
        display: block;
    }

    .nav {
        display: flex;
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 0.5rem;
        gap: 0.75rem;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        /* Smooth iOS scrolling */
        margin: 0 -0.5rem;
        /* Negative margin to align with edges */
        padding: 0 0.5rem 0.75rem 0.5rem;
        /* Padding for scroll spacing */
    }

    /* Hide scrollbar but allow functionality for cleaner look */
    .nav::-webkit-scrollbar {
        height: 4px;
        display: none;
        /* Optional: set to block if scrollbar desired */
    }

    .nav-btn {
        white-space: nowrap;
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
        flex-shrink: 0;
    }

    .view-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }



    .grid,
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .card,
    .project-card,
    .question-card,
    .stat-card {
        padding: 1.25rem;
    }

    /* Adjust Stats Controls for Mobile */
    #stats-controls {
        width: 100%;
        margin-top: 0.5rem;
    }

    #stats-controls .btn-group {
        width: 100%;
        display: flex;
    }

    #stats-controls .btn-group button {
        flex: 1;
        justify-content: center;
    }

    /* Stats View Header adjustment for the flex container I added */
    #stats-view .view-header>div {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .data-table th,
    .data-table td {
        padding: 0.75rem 0.5rem;
        font-size: 0.85rem;
    }

    .btn-group {
        flex-wrap: wrap;
    }

    .upload-area {
        padding: 2rem 1rem;
    }
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: #151932;
    margin: 10% auto;
    padding: 2rem;
    border: 1px solid var(--border-color);
    width: 90%;
    max-width: 500px;
    border-radius: 12px;
    position: relative;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.close {
    color: var(--text-secondary);
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover,
.close:focus {
    color: var(--text-primary);
    text-decoration: none;
    cursor: pointer;
}

.tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    background: rgba(99, 102, 241, 0.2);
    color: var(--text-primary);
    font-size: 0.8rem;
    margin-right: 4px;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

/* Achievements */
.achievement-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.achievement-card.locked {
    opacity: 0.6;
    filter: grayscale(1);
}

.achievement-card.unlocked {
    border-color: var(--accent-success);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(16, 185, 129, 0.1) 100%);
}

.achievement-card:hover {
    transform: translateY(-2px);
}

.achievement-icon {
    font-size: 2.5rem;
    min-width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: 50%;
    margin-right: 0.5rem;
}

.achievement-info h3 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.achievement-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.achievement-date {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Toast Notifications */
.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--accent-primary);
    border-left: 4px solid var(--accent-primary);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 300px;
    animation: slideInRight 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    backdrop-filter: blur(10px);
}

.toast-icon {
    font-size: 1.5rem;
}

.toast-content h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.toast-content p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.toast.fade-out {
    animation: slideOutRight 0.3s ease forwards;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideOutRight {
    from {
        opacity: 1;
        transform: translateX(0);
    }

    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* ... existing styles ... */

/* Ratings & Badges */

.star-rating {
    font-size: 2rem;
    cursor: pointer;
    color: #ccc;
    transition: color 0.2s;
}

/* Hover effect handled by JS for reliability */


.project-rating {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.badge {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
}

.badge.public {
    background-color: rgba(72, 187, 120, 0.2);
    color: #48bb78;
    border: 1px solid rgba(72, 187, 120, 0.3);
}

.badge.private {
    background-color: rgba(160, 174, 192, 0.2);
    color: #a0aec0;
    border: 1px solid rgba(160, 174, 192, 0.3);
}

.badge.restricted {
    background-color: rgba(236, 201, 75, 0.2);
    color: #ecc94b;
    border: 1px solid rgba(236, 201, 75, 0.3);
}

.access-group-cb {
    width: 1rem;
    height: 1rem;
}
/* Mobile Quiz Optimizations */
@media (max-width: 768px) {
    .quiz-answers-grid {
        margin-top: 1rem;
        gap: 0.5rem;
    }
    
    .answer-option {
        padding: 0.75rem 1rem;
        font-size: 0.95rem;
    }

    #next-question-btn {
        margin-top: 1rem;
        /* Sticky Footer Effect so it is always visible on mobile */
        position: sticky;
        bottom: 1rem;
        z-index: 10;
        box-shadow: 0 4px 15px rgba(0,0,0,0.5);
    }
}