/* ===========================
   CSS VARIABLES & RESET
   =========================== */
:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    --dark: #1e293b;
    --dark-light: #334155;
    --light: #f8fafc;
    --gray: #64748b;
    --gray-light: #e2e8f0;
    --white: #ffffff;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===========================
   HEADER STYLES
   =========================== */
.main-header {
    background: var(--white);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    gap: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    cursor: pointer;
    text-decoration: none;
}

.logo i {
    font-size: 2rem;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.main-nav a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    color: var(--gray);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-weight: 500;
}

.main-nav a:hover,
.main-nav a.active {
    background: var(--primary-color);
    color: var(--white);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
}

.notification-btn {
    position: relative;
    background: var(--light);
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.2rem;
    color: var(--gray);
}

.notification-btn:hover {
    background: var(--primary-color);
    color: var(--white);
}

.notification-btn .badge {
    position: absolute;
    top: 5px;
    right: 5px;
    background: var(--danger-color);
    color: var(--white);
    font-size: 0.7rem;
    padding: 0.1rem 0.4rem;
    border-radius: 10px;
    font-weight: 600;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--light);
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
}

.user-profile:hover {
    background: var(--gray-light);
}

.user-profile img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.user-profile span {
    font-weight: 600;
    color: var(--dark);
}

/* User Dropdown */
.user-dropdown {
    position: absolute;
    top: 60px;
    right: 0;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    min-width: 250px;
    display: none;
    z-index: 1001;
}

.user-dropdown.show {
    display: block;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.user-dropdown .dropdown-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid var(--gray-light);
}

.user-dropdown .dropdown-header img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
}

.user-dropdown .dropdown-header strong {
    display: block;
    color: var(--dark);
}

.user-dropdown .dropdown-header p {
    font-size: 0.85rem;
    color: var(--gray);
    margin: 0;
}

.user-dropdown ul {
    list-style: none;
    padding: 0.5rem 0;
}

.user-dropdown ul li {
    margin: 0;
}

.user-dropdown ul li.divider {
    height: 1px;
    background: var(--gray-light);
    margin: 0.5rem 0;
}

.user-dropdown ul li a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--dark);
    text-decoration: none;
    transition: var(--transition);
}

.user-dropdown ul li a:hover {
    background: var(--light);
}

.user-dropdown ul li a.logout {
    color: var(--danger-color);
}

.user-dropdown ul li a.logout:hover {
    background: #fee2e2;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--dark);
}

/* ===========================
   MAIN CONTENT STYLES
   =========================== */
.main-content {
    flex: 1;
    padding: 2rem 0;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.dashboard-header h1 {
    font-size: 2rem;
    color: var(--dark);
}

.dashboard-header p {
    color: var(--gray);
    margin-top: 0.25rem;
}

/* ===========================
   BUTTONS
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover {
    background: #4f46e5;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--gray-light);
    color: var(--dark);
}

.btn-secondary:hover {
    background: var(--gray);
    color: var(--white);
}

.btn-icon {
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: var(--gray);
    transition: var(--transition);
    border-radius: 8px;
}

.btn-icon:hover {
    background: var(--light);
    color: var(--primary-color);
}

/* ===========================
   STATS GRID
   =========================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
}

.stat-icon.blue {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.stat-icon.green {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.stat-icon.purple {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
}

.stat-icon.orange {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.stat-info {
    flex: 1;
}

.stat-info h3 {
    font-size: 1.75rem;
    color: var(--dark);
    margin-bottom: 0.25rem;
}

.stat-info p {
    color: var(--gray);
    font-size: 0.9rem;
}

.stat-change {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
}

.stat-change.positive {
    background: #d1fae5;
    color: var(--success-color);
}

.stat-change.negative {
    background: #fee2e2;
    color: var(--danger-color);
}

/* ===========================
   SECTION HEADER
   =========================== */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.section-header h2 {
    font-size: 1.5rem;
    color: var(--dark);
}

.view-all {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.view-all:hover {
    gap: 0.75rem;
}

/* ===========================
   QUIZ GRID
   =========================== */
.quiz-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.quiz-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.quiz-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.quiz-badge {
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.quiz-badge.active {
    background: #d1fae5;
    color: var(--success-color);
}

.quiz-badge.draft {
    background: #fef3c7;
    color: var(--warning-color);
}

.quiz-badge.closed {
    background: #e2e8f0;
    color: var(--gray);
}

.quiz-actions button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray);
    padding: 0.5rem;
    transition: var(--transition);
}

.quiz-actions button:hover {
    color: var(--primary-color);
}

.quiz-card h3 {
    font-size: 1.25rem;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.quiz-card p {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    line-height: 1.5;
    flex: 1;
}

.quiz-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--gray-light);
}

.quiz-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray);
    font-size: 0.85rem;
}

.quiz-meta i {
    color: var(--primary-color);
}

.quiz-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.quiz-date {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray);
    font-size: 0.8rem;
}

.quiz-date i {
    color: var(--primary-color);
}

.quiz-buttons {
    display: flex;
    gap: 0.5rem;
}

/* ===========================
   MODAL STYLES
   =========================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    overflow-y: auto;
    padding: 2rem 1rem;
}

.modal.show {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--white);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 800px;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-light);
}

.modal-header h2 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    color: var(--dark);
}

.close-modal {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--gray);
    transition: var(--transition);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.close-modal:hover {
    background: var(--light);
    color: var(--danger-color);
}

/* ===========================
   FORM STYLES
   =========================== */
#quizForm {
    padding: 1.5rem;
    max-height: 70vh;
    overflow-y: auto;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--dark);
    font-weight: 600;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="email"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--gray-light);
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    color: var(--dark);
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

/* ===========================
   QUESTIONS SECTION
   =========================== */
.questions-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--gray-light);
}

.questions-section h3 {
    font-size: 1.25rem;
    color: var(--dark);
    margin-bottom: 1.5rem;
}

.question-item {
    background: var(--light);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.question-header h4 {
    color: var(--primary-color);
    font-size: 1.1rem;
}

.options-container {
    margin-top: 1rem;
}

.options-container label {
    margin-bottom: 0.75rem;
}

.option-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.option-item input[type="radio"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.option-item input[type="text"] {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid var(--gray-light);
    border-radius: 8px;
    font-size: 1rem;
}

.option-item .remove-option {
    color: var(--danger-color);
}

.add-option {
    margin-top: 0.5rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    padding: 1.5rem;
    border-top: 1px solid var(--gray-light);
}

/* ===========================
   FOOTER STYLES
   =========================== */
.main-footer {
    background: var(--dark);
    color: var(--white);
    padding: 3rem 0 1rem;
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.footer-section h4 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--white);
}

.footer-section p {
    color: var(--gray-light);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--dark-light);
    color: var(--white);
    border-radius: 50%;
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.75rem;
}

.footer-section ul li a {
    color: var(--gray-light);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--primary-color);
    padding-left: 0.5rem;
}

.newsletter-form {
    display: flex;
    gap: 0.5rem;
}

.newsletter-form input {
    flex: 1;
    padding: 0.75rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
}

.newsletter-form button {
    padding: 0.75rem 1.25rem;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.newsletter-form button:hover {
    background: #4f46e5;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--dark-light);
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom p {
    color: var(--gray-light);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--gray-light);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* ===========================
   RESPONSIVE DESIGN
   =========================== */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .quiz-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .main-nav {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 250px;
        height: calc(100vh - 70px);
        background: var(--white);
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
        padding: 2rem 1rem;
    }
    
    .main-nav.show {
        left: 0;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .main-nav a {
        width: 100%;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .header-actions {
        gap: 0.5rem;
    }
    
    .user-profile span {
        display: none;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .quiz-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .modal-content {
        margin: 1rem;
    }
}

@media (max-width: 480px) {
    .logo span {
        display: none;
    }
    
    .dashboard-header h1 {
        font-size: 1.5rem;
    }
    
    .stat-info h3 {
        font-size: 1.5rem;
    }
    
    .modal {
        padding: 1rem 0.5rem;
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .modal-footer .btn {
        width: 100%;
    }
}

/* ===========================
   UTILITY CLASSES
   =========================== */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.hidden {
    display: none;
}

/* ===========================
   SCROLLBAR STYLING
   =========================== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--light);
}

::-webkit-scrollbar-thumb {
    background: var(--gray);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}