/* ===== VARIÁVEIS E RESET ===== */
:root {
    --primary-color: #00ff88;
    --primary-dark: #00cc6a;
    --primary-light: #33ff9c;
    --primary-rgb: 0, 255, 136;

    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-card: #151515;

    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-tertiary: #666666;

    --border-color: #2a2a2a;
    --success-color: #00ff88;
    --danger-color: #ff4444;
    --warning-color: #ffaa00;
    --info-color: #00a8ff;

    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-primary: 0 4px 20px rgba(0, 255, 136, 0.3);

    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 50%;

    --transition: 250ms ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== HEADER COMPLETO ===== */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.top-bar {
    height: 70px;
}

.top-bar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: 20px;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-md);
    transition: background var(--transition);
}

@media (max-width: 992px) {
    .menu-toggle {
        display: block;
    }
}

.menu-toggle:hover {
    background: var(--bg-secondary);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-weight: 700;
}

.logo i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1;
}

.logo-primary {
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 400;
}

.logo-secondary {
    color: var(--primary-color);
    font-size: 1.1rem;
    font-weight: 700;
}

/* Menu de Navegação */
.main-navigation {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 5px;
    overflow-x: auto;
    scrollbar-width: none;
}

.nav-menu::-webkit-scrollbar {
    display: none;
}

.nav-item {
    flex-shrink: 0;
}

.nav-item a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    white-space: nowrap;
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.nav-item a:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.nav-item.active a {
    color: var(--primary-color);
    background: rgba(var(--primary-rgb), 0.1);
}

.nav-item a i {
    font-size: 1.1rem;
}

.nav-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background: var(--primary-color);
    color: var(--bg-primary);
    font-size: 0.7rem;
    min-width: 18px;
    height: 18px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
    font-weight: 600;
}

/* User Section */
.user-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.notification-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-md);
    position: relative;
    transition: background var(--transition);
}

.notification-btn:hover {
    background: var(--bg-secondary);
}

.notification-badge {
    position: absolute;
    top: 5px;
    right: 5px;
    background: var(--danger-color);
    color: white;
    font-size: 0.7rem;
    min-width: 18px;
    height: 18px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
    font-weight: 600;
}

.quick-action-btn {
    background: var(--primary-color);
    color: var(--bg-primary);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.25rem;
    transition: all var(--transition);
}

.quick-action-btn:hover {
    background: var(--primary-dark);
    transform: rotate(90deg);
}

.profile-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

.profile-toggle:hover {
    background: var(--bg-secondary);
    transform: scale(1.05);
}

.profile-avatar {
    position: relative;
}

.profile-avatar img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 2px solid transparent;
    transition: border-color var(--transition);
}

.profile-toggle:hover .profile-avatar img {
    border-color: var(--primary-color);
}

.user-status {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--success-color);
    border: 2px solid var(--bg-card);
}

.user-status.online {
    background: var(--success-color);
}

.user-status.away {
    background: var(--warning-color);
}

.user-status.busy {
    background: var(--danger-color);
}

.user-status.offline {
    background: var(--text-tertiary);
}

.profile-info {
    text-align: left;
}

.profile-name {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
}

.profile-level {
    display: block;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ===== CONTEÚDO PRINCIPAL ===== */
.main-content {
    margin-top: 140px;
    padding: 30px 0;
    min-height: calc(100vh - 200px);
}

/* Header do Laboratório */
.lab-header {
    margin-bottom: 40px;
    text-align: center;
}

.lab-title {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.lab-subtitle {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

/* Filtros */
.filters {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 10px 20px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    font-weight: 500;
}

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

.filter-btn.active {
    background: rgba(var(--primary-rgb), 0.1);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Grid de Cursos */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

/* Card de Curso */
.course-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
}

.course-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.course-card.featured {
    border-color: var(--primary-color);
    border-width: 2px;
}

.course-header {
    position: relative;
}

.course-thumbnail {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
}

.course-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    background: var(--primary-color);
    color: var(--bg-primary);
    padding: 5px 10px;
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
}

.course-badge i {
    font-size: 0.8rem;
}

.course-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(0, 0, 0, 0.8);
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    transition: all var(--transition);
}

.course-card:hover .course-play-btn {
    opacity: 1;
}

.course-body {
    padding: 20px;
}

.course-title {
    font-size: 1.25rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.course-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 15px;
    line-height: 1.5;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.course-duration {
    display: flex;
    align-items: center;
    gap: 5px;
}

.course-modules {
    display: flex;
    align-items: center;
    gap: 5px;
}

.course-progress {
    margin-bottom: 15px;
}

.progress-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 5px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.progress-bar {
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--primary-color);
    border-radius: 3px;
    transition: width var(--transition);
}

.course-actions {
    display: flex;
    gap: 10px;
}

/* ===== BOTÕES ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

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

.btn-secondary:hover {
    background: rgba(var(--primary-rgb), 0.1);
}

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

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    justify-content: center;
}

/* Video Navigation Overlay */
.video-container {
    position: relative;
    background: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.video-nav-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    pointer-events: none;
    z-index: 10;
}

.nav-overlay-btn {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    pointer-events: auto;
    transition: all 0.3s ease;
    opacity: 0;
    /* Hidden by default, shows on container hover */
}

.video-container:hover .nav-overlay-btn {
    opacity: 1;
}

.nav-overlay-btn:hover {
    background: var(--primary-color);
    color: var(--bg-primary);
    transform: scale(1.1);
}

/* ===== MODAIS ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    padding: 20px;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 30px;
    width: 90%;
    max-width: 1200px;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-20px);
    transition: transform var(--transition);
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background: var(--bg-card);
    z-index: 1;
}

.modal-header h3 {
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 5px;
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

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

/* Modal de Perfil */
.profile-modal .modal-content {
    max-width: 600px;
}

.profile-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: 30px;
}

.profile-avatar-large {
    position: relative;
    margin-bottom: 20px;
}

.profile-avatar-large img {
    width: 150px;
    height: 150px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 4px solid var(--primary-color);
    box-shadow: var(--shadow-primary);
}

.change-avatar-btn {
    position: absolute;
    bottom: 10px;
    right: 10px;
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: var(--bg-primary);
    border: none;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1rem;
    transition: all var(--transition);
}

.change-avatar-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}

.profile-info-large h2 {
    font-size: 1.75rem;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.profile-info-large .email {
    color: var(--text-secondary);
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.profile-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin: 30px 0;
}

.stat-item-large {
    text-align: center;
    padding: 20px 15px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.stat-item-large:hover {
    transform: translateY(-2px);
    background: rgba(var(--primary-rgb), 0.1);
}

.stat-value-large {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
    line-height: 1;
}

.stat-label-large {
    display: block;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.profile-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
}

.profile-tab {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 10px 20px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition);
    position: relative;
}

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

.profile-tab.active {
    color: var(--primary-color);
    background: rgba(var(--primary-rgb), 0.1);
}

.profile-tab.active::after {
    content: '';
    position: absolute;
    bottom: -16px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px 3px 0 0;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* Formulários */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.1);
}

.form-control.error {
    border-color: var(--danger-color);
}

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

/* Listas */
.settings-list {
    list-style: none;
}

.settings-list li {
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.settings-list li:last-child {
    border-bottom: none;
}

.setting-label {
    color: var(--text-primary);
    font-weight: 500;
}

.setting-description {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 5px;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-tertiary);
    transition: .4s;
    border-radius: 34px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 4px;
    bottom: 4px;
    background-color: var(--text-primary);
    transition: .4s;
    border-radius: 50%;
}

input:checked+.toggle-slider {
    background-color: var(--primary-color);
}

input:checked+.toggle-slider:before {
    transform: translateX(24px);
}

/* Modal de Trocar Avatar */
.avatar-modal .modal-content {
    max-width: 500px;
}

.avatar-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin: 20px 0;
}

.avatar-option {
    cursor: pointer;
    border-radius: var(--radius-full);
    overflow: hidden;
    border: 3px solid transparent;
    transition: all var(--transition);
}

.avatar-option:hover {
    transform: scale(1.1);
    border-color: var(--primary-light);
}

.avatar-option.selected {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-primary);
}

.avatar-option img {
    width: 100%;
    height: 100px;
    object-fit: cover;
    display: block;
}

.upload-avatar {
    text-align: center;
    padding: 30px;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    margin: 20px 0;
    cursor: pointer;
    transition: all var(--transition);
}

.upload-avatar:hover {
    border-color: var(--primary-color);
    background: rgba(var(--primary-rgb), 0.05);
}

.upload-avatar i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.upload-avatar p {
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.upload-avatar .btn-sm {
    margin-top: 10px;
}

/* Modal de Videoaula */
.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    /* 16:9 Aspect Ratio */
    margin-bottom: 20px;
    background: #000;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-info h4 {
    margin-bottom: 10px;
    font-size: 1.25rem;
}

.video-description {
    color: var(--text-secondary);
    margin-bottom: 25px;
    line-height: 1.7;
    font-size: 0.95rem;
    white-space: pre-wrap;
    background: rgba(255, 255, 255, 0.02);
    padding: 15px;
    border-radius: var(--radius-md);
    border-left: 3px solid var(--primary-color);
}

.video-meta {
    display: flex;
    gap: 20px;
    color: var(--text-tertiary);
    font-size: 0.9rem;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

/* Lista de Aulas */
.lessons-list {
    margin-top: 25px;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

#lessonsContainer, #courseLessons {
    max-height: 420px;
    overflow-y: auto;
    padding-right: 12px;
    margin-top: 15px;
}

/* Scrollbar Customizado para a Lista */
#lessonsContainer::-webkit-scrollbar, 
#courseLessons::-webkit-scrollbar {
    width: 6px;
}
#lessonsContainer::-webkit-scrollbar-track,
#courseLessons::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 10px;
}
#lessonsContainer::-webkit-scrollbar-thumb,
#courseLessons::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 10px;
}

.lessons-list h4 {
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.lesson-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 10px;
    cursor: pointer;
    transition: all var(--transition);
}

.lesson-item:hover {
    border-color: var(--primary-color);
    background: rgba(var(--primary-rgb), 0.05);
}

.lesson-item.active {
    background: rgba(var(--primary-rgb), 0.1);
    border-color: var(--primary-color);
}

.lesson-icon {
    width: 40px;
    height: 40px;
    background: rgba(var(--primary-rgb), 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    flex-shrink: 0;
}

.lesson-info {
    flex: 1;
}

.lesson-title {
    font-weight: 600;
    margin-bottom: 5px;
}

.lesson-duration {
    color: var(--text-tertiary);
    font-size: 0.85rem;
}

.lesson-status {
    color: var(--text-tertiary);
    font-size: 0.8rem;
}

.lesson-status.completed {
    color: var(--success-color);
}

.lesson-status.current {
    color: var(--primary-color);
    font-weight: 600;
}

/* Modal de Detalhes do Curso */
.course-details {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 30px;
}

.course-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.course-cover-preview {
    width: 100%;
    height: 250px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    border: 1px solid var(--border-color);
}

.detail-course-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.course-cover-preview:hover .detail-course-cover {
    transform: scale(1.05);
}

.course-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin: 20px 0;
}

.stat-item {
    text-align: center;
    padding: 15px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Modal de Progresso */
.progress-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.progress-chart {
    text-align: center;
}

.progress-circle {
    width: 150px;
    height: 150px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: conic-gradient(var(--primary-color) 0%, var(--bg-tertiary) 0%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.progress-circle::before {
    content: '';
    position: absolute;
    width: 120px;
    height: 120px;
    background: var(--bg-card);
    border-radius: 50%;
}

.progress-circle span {
    position: relative;
    z-index: 1;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.progress-breakdown {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.breakdown-item:last-child {
    border-bottom: none;
}

.breakdown-label {
    color: var(--text-secondary);
}

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

/* Modal de Certificado */
.certificate-preview {
    text-align: center;
    padding: 30px;
    background: linear-gradient(135deg, #1a1a1a, #2a2a2a);
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-lg);
    margin-bottom: 30px;
}

.certificate-icon {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.certificate-title {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.certificate-subtitle {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.certificate-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 30px 0;
}

.info-item {
    text-align: left;
}

.info-label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.info-value {
    display: block;
    font-weight: 600;
}

/* ===== MENSAGENS ===== */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--bg-card);
    border-left: 4px solid var(--info-color);
    padding: 15px 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 15px;
    z-index: 3000;
    transform: translateX(100%);
    opacity: 0;
    transition: all var(--transition);
}

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

.toast.success {
    border-left-color: var(--success-color);
}

.toast.error {
    border-left-color: var(--danger-color);
}

.toast.warning {
    border-left-color: var(--warning-color);
}

.toast-icon {
    font-size: 1.25rem;
}

.toast.success .toast-icon {
    color: var(--success-color);
}

.toast.error .toast-icon {
    color: var(--danger-color);
}

.toast.warning .toast-icon {
    color: var(--warning-color);
}

.toast.info .toast-icon {
    color: var(--info-color);
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    margin-bottom: 5px;
}

.toast-message {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 5px;
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

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

/* ===== FOOTER ===== */
.main-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 30px 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.footer-logo i {
    font-size: 1.5rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 25px;
}

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

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

.footer-copyright {
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

/* ===== RESPONSIVIDADE ===== */
@media (max-width: 992px) {
    .menu-toggle {
        display: block;
    }

    .main-navigation {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(15px);
        border-top: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
        padding: 10px 0;
        z-index: 999;
        transform: translateY(-20px);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: all 0.3s ease;
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }

    .main-navigation.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        pointer-events: all;
    }

    .nav-menu {
        flex-direction: column;
        padding: 15px;
    }

    .nav-item a {
        justify-content: space-between;
        padding: 15px;
    }

    .main-content {
        margin-top: 70px;
    }

    .profile-info {
        display: none;
    }

    .courses-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }

    .course-details,
    .progress-details {
        grid-template-columns: 1fr;
    }

    .modal-content {
        width: 95%;
        max-height: 85vh;
        padding: 20px;
    }

    .profile-stats {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    .courses-grid {
        grid-template-columns: 1fr;
    }

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

    .filter-btn {
        width: 100%;
        max-width: 300px;
    }

    .course-actions {
        flex-direction: column;
    }

    .course-actions .btn {
        width: 100%;
        justify-content: center;
    }

    .course-stats {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .modal-actions {
        flex-direction: column;
    }

    .modal-actions .btn {
        width: 100%;
    }

    .profile-tabs {
        flex-direction: column;
    }

    .profile-tab.active::after {
        display: none;
    }

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

@media (max-width: 480px) {
    .video-meta {
        flex-direction: column;
        gap: 10px;
    }

    .course-stats,
    .profile-stats {
        grid-template-columns: 1fr;
    }

    .toast {
        left: 20px;
        right: 20px;
        bottom: 20px;
    }

    .lesson-item {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }

    .lesson-info {
        width: 100%;
    }

    .avatar-options {
        grid-template-columns: repeat(2, 1fr);
    }

    .profile-avatar-large img {
        width: 120px;
        height: 120px;
    }
}