/* ===================================
   VARIÁVEIS E RESET
   =================================== */

:root {
    --primary-color: #1e40af;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
}

/* ===================================
   HEADER
   =================================== */

.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #3b82f6 100%);
    color: white;
    padding: 2rem 1rem 1rem;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    flex-wrap: wrap;
    gap: 1rem;
}

.header-title {
    flex: 1;
}

.header-container h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
}

/* ===================================
   MENU MOBILE (HAMBÚRGUER)
   =================================== */

.mobile-menu-btn {
    display: none !important;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    padding: 8px;
    gap: 5px;
    transition: all 0.3s ease;
    z-index: 1001;
}

.mobile-menu-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 3px;
    background: white;
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* Animação do X quando menu aberto */
.mobile-menu-btn.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-btn.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Overlay escuro quando menu aberto */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.3s ease;
    backdrop-filter: blur(3px);
}

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

/* Header mobile do sidebar */
.sidebar-header-mobile {
    display: none !important;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, #3b82f6 100%);
    color: white;
    margin: -1.5rem -1.5rem 1rem -1.5rem;
    border-radius: 12px 12px 0 0;
}

.sidebar-header-mobile h2 {
    margin: 0;
    font-size: 1.2rem;
}

.close-sidebar-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.close-sidebar-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.sidebar-title-desktop {
    display: block;
}

/* Botão flutuante - escondido por padrão (desktop) */
.fab-modules {
    display: none;
}

.user-info-header {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-greeting {
    font-size: 1rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1.2rem;
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-logout-header {
    background: rgba(239, 68, 68, 0.9);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-logout-header:hover {
    background: #dc2626;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(239, 68, 68, 0.3);
}

.progress-bar-container {
    max-width: 1200px;
    margin: 1rem auto 0;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 50px;
    height: 38px;
    overflow: hidden;
    box-shadow:
        inset 0 2px 10px rgba(0, 0, 0, 0.3),
        0 2px 5px rgba(0, 0, 0, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.15);
    position: relative;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(
        90deg,
        #10b981 0%,
        #34d399 25%,
        #6ee7b7 50%,
        #34d399 75%,
        #10b981 100%
    );
    background-size: 200% 100%;
    animation: shimmer 3s ease-in-out infinite;
    border-radius: 50px;
    width: 0%;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 0.95rem;
    position: relative;
    box-shadow:
        0 0 20px rgba(16, 185, 129, 0.5),
        inset 0 2px 10px rgba(255, 255, 255, 0.3);
    min-width: fit-content;
    padding: 0 1rem;
}

/* Efeito de brilho animado na barra */
@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Efeito de onda de luz passando */
.progress-bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.4) 50%,
        transparent 100%
    );
    background-size: 50% 100%;
    animation: shine 2.5s ease-in-out infinite;
    border-radius: 50px;
    pointer-events: none;
}

@keyframes shine {
    0% { transform: translateX(-100%); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateX(200%); opacity: 0; }
}

/* Texto do progresso com sombra */
.progress-text {
    position: relative;
    z-index: 2;
    text-shadow:
        0 1px 3px rgba(0, 0, 0, 0.5),
        0 0 10px rgba(255, 255, 255, 0.3);
    letter-spacing: 0.5px;
    white-space: nowrap;
}

/* Ícone de estrela/troféu para progresso alto */
.progress-bar[data-progress="high"]::after {
    content: '⭐';
    margin-left: 8px;
    font-size: 1rem;
    animation: star-pulse 1s ease-in-out infinite;
}

@keyframes star-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

/* Estilo especial quando 100% completo */
.progress-bar.completed {
    background: linear-gradient(
        90deg,
        #f59e0b 0%,
        #fbbf24 25%,
        #fcd34d 50%,
        #fbbf24 75%,
        #f59e0b 100%
    );
    background-size: 200% 100%;
    box-shadow:
        0 0 30px rgba(245, 158, 11, 0.6),
        0 0 60px rgba(245, 158, 11, 0.3),
        inset 0 2px 10px rgba(255, 255, 255, 0.4);
    animation: shimmer 3s ease-in-out infinite, pulse-glow 2s ease-in-out infinite;
}

.progress-bar.completed::after {
    content: '🏆';
    margin-left: 10px;
    font-size: 1.1rem;
    animation: trophy-bounce 1s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow:
            0 0 20px rgba(245, 158, 11, 0.4),
            inset 0 2px 10px rgba(255, 255, 255, 0.4);
    }
    50% {
        box-shadow:
            0 0 40px rgba(245, 158, 11, 0.8),
            0 0 80px rgba(245, 158, 11, 0.4),
            inset 0 2px 10px rgba(255, 255, 255, 0.4);
    }
}

@keyframes trophy-bounce {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-3px) rotate(-5deg); }
    75% { transform: translateY(-3px) rotate(5deg); }
}

/* ===================================
   LAYOUT PRINCIPAL
   =================================== */

.main-container {
    display: flex;
    max-width: 1400px;
    margin: 2rem auto;
    gap: 2rem;
    padding: 0 1rem;
}

/* ===================================
   SIDEBAR
   =================================== */

.sidebar {
    width: 320px;
    background: var(--bg-white);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    height: fit-content;
    position: sticky;
    top: 200px;
    max-height: calc(100vh - 220px);
    overflow-y: auto;
}

.sidebar h2 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    text-align: center;
}

/* Navegação de Módulos */
.modules-nav {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* Item de Módulo (Accordion Header) */
.module-item {
    border-radius: 8px;
    overflow: hidden;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.module-item.active {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.module-item.locked {
    opacity: 0.6;
    border-color: var(--border-color);
}

/* Cabeçalho do Módulo */
.module-header {
    padding: 1rem;
    cursor: pointer;
    background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: space-between;
    user-select: none;
}

.module-header:hover:not(.locked) {
    background: linear-gradient(135deg, #e5e7eb 0%, #d1d5db 100%);
}

.module-header.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, #3b82f6 100%);
    color: white;
}

.module-header.locked {
    cursor: not-allowed;
    background: #f9fafb;
}

.module-header-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
}

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

.module-info h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.2rem;
}

.module-info p {
    font-size: 0.8rem;
    opacity: 0.8;
}

.module-header.locked .module-info p::after {
    content: ' 🔒';
}

/* Ícone de Expansão */
.module-expand-icon {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.module-header.expanded .module-expand-icon {
    transform: rotate(90deg);
}

.module-header.locked .module-expand-icon {
    opacity: 0.3;
}

/* Lista de Aulas dentro do Módulo */
.module-lessons {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    background: white;
}

.module-lessons.expanded {
    max-height: 1200px; /* Aumentado para comportar todas as 10 aulas */
    overflow-y: auto; /* Scroll se necessário */
}

.lessons-list {
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    min-height: fit-content; /* Garante que todas as aulas sejam exibidas */
}

/* Item de Aula */
.lesson-item {
    padding: 0.7rem 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.9rem;
    position: relative;
    padding-left: 1.5rem;
}

.lesson-item::before {
    position: absolute;
    left: 0.5rem;
}

.lesson-item:hover:not(.active) {
    background: var(--bg-light);
    transform: translateX(5px);
    border-left: 3px solid var(--primary-color);
}

.lesson-item.completed:not(.active) {
    background: #f0fdf4;
    border-left: 3px solid var(--success-color);
}

/* Aula Ativa - SEMPRE tem prioridade sobre completed */
.lesson-item.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, #3b82f6 100%) !important;
    color: white !important;
    border: 2px solid var(--primary-color) !important;
    border-left: 3px solid var(--primary-color) !important;
    font-weight: 600;
    transform: translateX(5px);
    box-shadow: 0 2px 8px rgba(30, 64, 175, 0.3);
}

/* Ícone padrão - não iniciada */
.lesson-item::before {
    content: '○';
    color: var(--text-light);
    font-size: 1rem;
}

/* Ícone de concluída */
.lesson-item.completed::before {
    content: '✓';
    color: var(--success-color);
    font-weight: bold;
    font-size: 1.1rem;
}

/* Ícone de ativa - SEMPRE tem prioridade */
.lesson-item.active::before {
    content: '▶' !important;
    color: white !important;
    font-size: 0.8rem;
}

.lesson-number {
    font-weight: 600;
    min-width: 20px;
}

.lesson-title {
    flex: 1;
}

/* Garantir texto branco quando aula está ativa */
.lesson-item.active .lesson-number,
.lesson-item.active .lesson-title {
    color: white !important;
}

.lesson-duration {
    font-size: 0.75rem;
    color: var(--text-light);
    font-weight: normal;
}

.lesson-item.active .lesson-duration {
    color: rgba(255, 255, 255, 0.8);
}

/* Badge de Progresso do Módulo */
.module-progress {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary-color);
}

.module-header.active .module-progress {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

/* Scrollbar customizada */
.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.sidebar::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 10px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: #3b82f6;
}

/* ===================================
   ÁREA DE CONTEÚDO
   =================================== */

.content-area {
    flex: 1;
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    min-height: 600px;
}

/* Welcome Screen */
.welcome-screen {
    text-align: center;
    padding: 2rem;
}

.welcome-content h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.welcome-intro {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.course-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.info-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, #3b82f6 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.info-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.info-card p {
    opacity: 0.9;
    margin: 0.3rem 0;
}

.lesson-overview {
    margin: 3rem 0;
    text-align: left;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.lesson-overview h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.8rem;
}

.lesson-list {
    list-style: none;
    padding: 0;
}

.lesson-list li {
    padding: 0.8rem;
    margin: 0.5rem 0;
    background: var(--bg-light);
    border-left: 4px solid var(--secondary-color);
    border-radius: 4px;
}

.lesson-list strong {
    color: var(--primary-color);
}

/* Lesson Content */
.lesson-content {
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.lesson-header {
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 1rem;
    margin-bottom: 2rem;
}

.lesson-header h1 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.lesson-meta {
    color: var(--text-light);
    font-size: 0.95rem;
}

.lesson-body {
    line-height: 1.8;
}

.lesson-body h2 {
    color: var(--primary-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.6rem;
}

.lesson-body h3 {
    color: var(--text-dark);
    margin-top: 1.5rem;
    margin-bottom: 0.8rem;
    font-size: 1.3rem;
}

.lesson-body h4 {
    color: var(--text-dark);
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.lesson-body p {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.lesson-body ul,
.lesson-body ol {
    margin: 1rem 0 1rem 2rem;
}

.lesson-body li {
    margin: 0.5rem 0;
}

.lesson-body blockquote {
    border-left: 4px solid var(--accent-color);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    background: #fef3c7;
    border-radius: 4px;
    font-style: italic;
}

.lesson-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    box-shadow: var(--shadow);
}

.lesson-body th {
    background: var(--primary-color);
    color: white;
    padding: 0.8rem;
    text-align: left;
}

.lesson-body td {
    padding: 0.8rem;
    border: 1px solid var(--border-color);
}

.lesson-body tr:nth-child(even) {
    background: var(--bg-light);
}

.lesson-body strong {
    color: var(--primary-color);
    font-weight: 600;
}

.lesson-body code {
    background: var(--bg-light);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

.lesson-body pre {
    background: var(--text-dark);
    color: white;
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1rem 0;
}

/* Lesson Navigation */
.lesson-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

/* ===================================
   QUIZ SECTION
   =================================== */

.quiz-section {
    animation: fadeIn 0.5s ease;
}

.quiz-header {
    text-align: center;
    margin-bottom: 2rem;
}

.quiz-header h2 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.quiz-questions {
    max-width: 800px;
    margin: 0 auto;
}

.question-card {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.question-number {
    color: var(--primary-color);
    font-weight: bold;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.question-text {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.options {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

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

.option:hover {
    border-color: var(--primary-color);
    transform: translateX(5px);
}

.option.selected {
    border-color: var(--primary-color);
    background: #dbeafe;
}

.option.correct {
    border-color: var(--success-color);
    background: #d1fae5;
}

.option.incorrect {
    border-color: var(--error-color);
    background: #fee2e2;
}

.option.disabled {
    cursor: not-allowed;
    opacity: 0.7;
}

.feedback {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 8px;
    animation: slideIn 0.3s ease;
}

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

.feedback.correct {
    background: #d1fae5;
    border-left: 4px solid var(--success-color);
    color: #065f46;
}

.feedback.incorrect {
    background: #fee2e2;
    border-left: 4px solid var(--error-color);
    color: #991b1b;
}

.feedback-icon {
    font-size: 1.5rem;
    margin-right: 0.5rem;
}

/* Question Styling */
.question {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.question-header {
    margin-bottom: 1rem;
}

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

.option-letter {
    width: 35px;
    height: 35px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.option-text {
    flex: 1;
}

.option.selected .option-letter {
    background: var(--secondary-color);
    transform: scale(1.1);
}

.option.correct .option-letter {
    background: var(--success-color);
}

.option.incorrect .option-letter {
    background: var(--error-color);
}

.result-icon {
    position: absolute;
    right: 1rem;
    font-size: 1.5rem;
    font-weight: bold;
}

.option.correct .result-icon {
    color: var(--success-color);
}

.option.incorrect .result-icon {
    color: var(--error-color);
}

/* Explanation */
.explanation {
    margin-top: 1rem;
    padding: 1rem;
    background: #f0f9ff;
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
}

.explanation-header {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.explanation p {
    color: var(--text-dark);
    line-height: 1.6;
    margin: 0;
}

/* Quiz Submit Container */
.quiz-submit-container {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

.quiz-hint {
    margin-top: 1rem;
    color: var(--text-light);
    font-size: 0.9rem;
}

.btn-submit-quiz {
    min-width: 200px;
}

.btn-ready {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.btn-completed {
    background: linear-gradient(135deg, var(--success-color) 0%, #34d399 100%);
    cursor: default;
}

.no-quiz-message {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
    font-size: 1.2rem;
}

/* Quiz Results */
.quiz-results {
    text-align: center;
    padding: 2rem;
    animation: fadeIn 0.5s ease;
}

.quiz-results h3 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 2rem;
}

.results-summary {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    margin: 2rem 0;
}

.score-circle {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color) 0%, #3b82f6 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
}

.score-circle span {
    font-size: 2.5rem;
    font-weight: bold;
    color: white;
}

.results-details {
    text-align: left;
}

.results-details p {
    font-size: 1.2rem;
    margin: 0.5rem 0;
}

.results-message {
    font-size: 1.1rem;
    margin: 2rem 0;
    padding: 1.5rem;
    border-radius: 12px;
}

.result-excellent {
    background: linear-gradient(135deg, #d1fae5, #a7f3d0);
    padding: 1.5rem;
    border-radius: 12px;
    border: 2px solid var(--success-color);
}

.result-excellent h3 {
    color: var(--success-color);
    margin-bottom: 1rem;
    font-size: 1.8rem;
}

.result-excellent p {
    color: #065f46;
    margin: 0.5rem 0;
}

.result-good {
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
    padding: 1.5rem;
    border-radius: 12px;
    border: 2px solid var(--primary-color);
}

.result-good h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.8rem;
}

.result-good p {
    color: #1e40af;
    margin: 0.5rem 0;
}

.result-fair {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    padding: 1.5rem;
    border-radius: 12px;
    border: 2px solid var(--warning-color);
}

.result-fair h3 {
    color: var(--warning-color);
    margin-bottom: 1rem;
    font-size: 1.8rem;
}

.result-fair p {
    color: #92400e;
    margin: 0.5rem 0;
}

.result-needs-improvement {
    background: linear-gradient(135deg, #fee2e2, #fecaca);
    padding: 1.5rem;
    border-radius: 12px;
    border: 2px solid var(--error-color);
}

.result-needs-improvement h3 {
    color: var(--error-color);
    margin-bottom: 1rem;
    font-size: 1.8rem;
}

.result-needs-improvement p {
    color: #991b1b;
    margin: 0.5rem 0;
}

.results-message.excellent {
    background: #d1fae5;
    color: #065f46;
    border: 2px solid var(--success-color);
}

.results-message.good {
    background: #dbeafe;
    color: #1e40af;
    border: 2px solid var(--primary-color);
}

.results-message.needs-improvement {
    background: #fef3c7;
    color: #92400e;
    border: 2px solid var(--warning-color);
}

.results-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

/* ===================================
   BOTÕES
   =================================== */

.btn-primary,
.btn-secondary,
.btn-start {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #3b82f6 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

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

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

.btn-secondary:hover {
    background: var(--bg-light);
    transform: translateY(-2px);
}

.btn-start {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #34d399 100%);
    color: white;
    font-size: 1.2rem;
    padding: 1rem 2rem;
    margin-top: 2rem;
}

.btn-start:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

/* ===================================
   MODAL
   =================================== */

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
}

.modal-content h2 {
    color: var(--success-color);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.modal-content p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}

/* ===================================
   RESPONSIVIDADE COMPLETA
   =================================== */

/* ===================================
   DESKTOP PEQUENO (< 1200px)
   =================================== */
@media (max-width: 1200px) {
    .main-container {
        max-width: 100%;
        padding: 0 1rem;
    }

    .sidebar {
        width: 280px;
    }
}

/* ===================================
   TABLET GRANDE (< 968px)
   =================================== */
@media (max-width: 968px) {
    /* Layout */
    .main-container {
        flex-direction: column;
        gap: 1rem;
    }

    .sidebar {
        width: 100%;
        position: static;
        max-height: none;
        overflow-y: visible;
    }

    /* Header */
    .header {
        padding: 1.5rem 1rem 1rem;
    }

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

    .header-container h1 {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .user-info-header {
        width: 100%;
        justify-content: space-between;
    }

    .user-greeting {
        font-size: 0.9rem;
        padding: 0.4rem 1rem;
    }

    .btn-logout-header {
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
    }

    /* Welcome screen */
    .course-info {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .info-card {
        padding: 1.25rem;
    }

    /* Quiz */
    .results-summary {
        flex-direction: column;
        gap: 1.5rem;
    }

    .lesson-navigation {
        flex-direction: column;
        gap: 1rem;
    }

    .results-actions {
        flex-direction: column;
        gap: 1rem;
    }

    .results-actions button {
        width: 100%;
    }

    /* Módulos */
    .module-header {
        padding: 0.8rem;
        font-size: 0.95rem;
    }

    .module-lessons {
        max-height: 800px;
    }
}

/* ===================================
   TABLET (< 768px)
   =================================== */
@media (max-width: 768px) {
    /* Mostrar botão hambúrguer */
    .mobile-menu-btn {
        display: flex !important;
    }

    /* Esconder título desktop do sidebar */
    .sidebar-title-desktop {
        display: none;
    }

    /* Mostrar header mobile do sidebar */
    .sidebar-header-mobile {
        display: flex !important;
    }

    /* Sidebar como drawer lateral */
    .sidebar {
        position: fixed;
        top: 0;
        left: -320px;
        width: 300px;
        height: 100vh;
        z-index: 999;
        border-radius: 0 16px 16px 0;
        transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        box-shadow: 5px 0 30px rgba(0, 0, 0, 0.3);
    }

    .sidebar.active {
        left: 0;
    }

    /* Main container ocupa toda a largura */
    .main-container {
        flex-direction: column;
    }

    /* Content area largura total */
    .content-area {
        width: 100%;
        min-width: unset;
    }

    /* Header */
    .header-container {
        gap: 0.8rem;
    }

    .header-container h1 {
        font-size: 1.3rem;
    }

    .progress-bar-container {
        margin: 0.8rem auto 0;
        height: 32px;
    }

    .progress-bar {
        font-size: 0.85rem;
        padding: 0 0.8rem;
    }

    .progress-text {
        font-size: 0.8rem;
    }

    .progress-bar.completed::after,
    .progress-bar[data-progress="high"]::after {
        font-size: 0.9rem;
        margin-left: 6px;
    }

    /* Content */
    .content-area {
        padding: 1.5rem;
    }

    .lesson-header h1 {
        font-size: 1.6rem;
    }

    .lesson-meta {
        font-size: 0.85rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    /* Buttons */
    .btn-primary,
    .btn-secondary {
        padding: 0.7rem 1.2rem;
        font-size: 0.95rem;
    }

    /* Quiz */
    .quiz-questions {
        padding: 1rem;
    }

    .question {
        padding: 1.25rem;
    }

    .option {
        padding: 0.8rem 1rem;
        font-size: 0.95rem;
    }

    .score-circle {
        width: 140px;
        height: 140px;
    }

    .score-circle span {
        font-size: 2.2rem;
    }

    /* Tabelas */
    table {
        font-size: 0.9rem;
    }

    th, td {
        padding: 0.6rem;
    }
}

/* ===================================
   MOBILE (< 640px)
   =================================== */
@media (max-width: 640px) {
    /* Header mais compacto */
    .header {
        padding: 0.8rem 0.75rem 0.6rem;
    }

    .header-container {
        gap: 0.5rem;
    }

    /* Título menor */
    .header-title {
        text-align: center;
        flex: 1;
    }

    .header-container h1 {
        font-size: 1rem;
    }

    .subtitle {
        font-size: 0.75rem;
        display: none; /* Esconder no mobile pequeno */
    }

    /* Esconder saudação no mobile pequeno */
    .user-greeting {
        display: none;
    }

    /* Botão logout menor */
    .btn-logout-header {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }

    /* Barra de progresso compacta */
    .progress-bar-container {
        height: 26px;
        margin: 0.5rem auto 0;
    }

    .progress-bar {
        font-size: 0.7rem;
        padding: 0 0.5rem;
    }

    .progress-text {
        font-size: 0.65rem;
    }

    /* Simplificar animações em mobile para performance */
    .progress-bar::before {
        animation: none;
    }

    .progress-bar.completed::after,
    .progress-bar[data-progress="high"]::after {
        font-size: 0.75rem;
        margin-left: 3px;
    }

    /* Main container */
    .main-container {
        margin: 0.5rem auto;
        padding: 0 0.5rem;
        gap: 0;
    }

    /* Sidebar drawer mais largo em mobile */
    .sidebar {
        width: 85vw;
        max-width: 320px;
        left: -90vw;
        padding: 1rem;
    }

    .sidebar-header-mobile {
        padding: 0.8rem 1rem;
        margin: -1rem -1rem 0.8rem -1rem;
    }

    .sidebar-header-mobile h2 {
        font-size: 1.1rem;
    }

    .close-sidebar-btn {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }

    .module-item {
        margin-bottom: 0.75rem;
    }

    .module-header {
        padding: 0.6rem;
        font-size: 0.85rem;
    }

    .module-icon {
        font-size: 1.2rem;
    }

    .module-title {
        font-size: 0.9rem;
    }

    .module-subtitle {
        font-size: 0.75rem;
    }

    .module-hours {
        font-size: 0.7rem;
        padding: 0.15rem 0.4rem;
    }

    .lesson-item {
        padding: 0.6rem;
        font-size: 0.85rem;
    }

    .lesson-number {
        min-width: 25px;
        height: 25px;
        font-size: 0.75rem;
    }

    /* Content area */
    .content-area {
        padding: 1rem;
    }

    .welcome-content {
        padding: 1.5rem;
    }

    .welcome-content h1 {
        font-size: 1.5rem;
    }

    .welcome-intro {
        font-size: 0.95rem;
    }

    .info-card {
        padding: 1rem;
    }

    .info-card h3 {
        font-size: 1rem;
    }

    .info-card p {
        font-size: 0.85rem;
    }

    .lesson-list {
        font-size: 0.85rem;
        padding-left: 1.5rem;
    }

    /* Lesson content */
    .lesson-header h1 {
        font-size: 1.3rem;
    }

    .lesson-meta {
        font-size: 0.75rem;
    }

    .lesson-body {
        font-size: 0.95rem;
        padding: 1rem;
    }

    .lesson-body h2 {
        font-size: 1.3rem;
    }

    .lesson-body h3 {
        font-size: 1.1rem;
    }

    .lesson-body ul,
    .lesson-body ol {
        padding-left: 1.5rem;
    }

    /* Buttons */
    .btn-primary,
    .btn-secondary {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
        width: 100%;
    }

    .btn-start {
        font-size: 1rem;
    }

    .lesson-navigation {
        gap: 0.75rem;
    }

    /* Quiz */
    .quiz-header h2 {
        font-size: 1.3rem;
    }

    .quiz-questions {
        padding: 0.75rem;
    }

    .question {
        padding: 1rem;
        margin-bottom: 1rem;
    }

    .question-number {
        font-size: 0.75rem;
    }

    .question-text {
        font-size: 0.95rem;
    }

    .option {
        padding: 0.7rem 0.8rem;
        font-size: 0.9rem;
    }

    .option-letter {
        min-width: 25px;
        height: 25px;
        font-size: 0.8rem;
    }

    .score-circle {
        width: 100px;
        height: 100px;
    }

    .score-circle span {
        font-size: 1.8rem;
    }

    .results-details {
        font-size: 0.9rem;
    }

    /* Modal */
    .modal-content {
        padding: 1.5rem;
        margin: 1rem;
        max-width: 90%;
    }

    .modal-content h2 {
        font-size: 1.5rem;
    }

    /* Tables */
    table {
        font-size: 0.8rem;
        display: block;
        overflow-x: auto;
    }

    th, td {
        padding: 0.4rem;
        min-width: 80px;
    }

    /* Botão flutuante para abrir módulos */
    .fab-modules {
        display: flex;
        position: fixed;
        bottom: 20px;
        right: 20px;
        width: 56px;
        height: 56px;
        background: linear-gradient(135deg, var(--primary-color) 0%, #3b82f6 100%);
        color: white;
        border: none;
        border-radius: 50%;
        font-size: 1.5rem;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        box-shadow:
            0 4px 15px rgba(30, 64, 175, 0.4),
            0 2px 5px rgba(0, 0, 0, 0.2);
        z-index: 997;
        transition: all 0.3s ease;
        animation: fab-pulse 2s ease-in-out infinite;
    }

    .fab-modules:hover {
        transform: scale(1.1);
        box-shadow:
            0 6px 20px rgba(30, 64, 175, 0.5),
            0 4px 10px rgba(0, 0, 0, 0.3);
    }

    .fab-modules:active {
        transform: scale(0.95);
    }

    @keyframes fab-pulse {
        0%, 100% { box-shadow: 0 4px 15px rgba(30, 64, 175, 0.4); }
        50% { box-shadow: 0 4px 25px rgba(30, 64, 175, 0.6); }
    }

    /* Esconder FAB quando menu está aberto */
    .fab-modules.hidden {
        opacity: 0;
        transform: scale(0);
        pointer-events: none;
    }
}

/* ===================================
   MOBILE PEQUENO (< 480px)
   =================================== */
@media (max-width: 480px) {
    .header-container h1 {
        font-size: 0.95rem;
    }

    .subtitle {
        display: none;
    }

    .user-greeting {
        display: none;
    }

    .welcome-content h1 {
        font-size: 1.2rem;
    }

    .lesson-header h1 {
        font-size: 1rem;
    }

    /* FAB menor em telas muito pequenas */
    .fab-modules {
        width: 50px;
        height: 50px;
        font-size: 1.3rem;
        bottom: 15px;
        right: 15px;
    }

    .module-title {
        font-size: 0.85rem;
    }

    .module-subtitle {
        font-size: 0.7rem;
    }

    .lesson-item {
        font-size: 0.8rem;
        padding: 0.5rem;
    }

    .score-circle {
        width: 90px;
        height: 90px;
    }

    .score-circle span {
        font-size: 1.6rem;
    }
}

/* ===================================
   LANDSCAPE MOBILE (altura < 500px)
   =================================== */
@media (max-height: 500px) and (orientation: landscape) {
    .header {
        position: relative;
    }

    .sidebar {
        max-height: 300px;
        overflow-y: auto;
    }

    .welcome-content {
        padding: 1rem;
    }

    .modal-content {
        max-height: 90vh;
        overflow-y: auto;
    }
}

/* ===================================
   IMAGENS
   =================================== */

.lesson-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1.5rem auto;
    display: block;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
}

.lesson-image:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.lesson-figure {
    margin: 2rem 0;
    text-align: center;
}

.lesson-image-caption {
    text-align: center;
    font-style: italic;
    color: var(--text-light);
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

.lesson-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1.5rem 0;
    box-shadow: var(--shadow);
}

/* Galeria de imagens */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.image-gallery img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.image-gallery img:hover {
    transform: scale(1.05);
}

/* ===================================
   UTILITÁRIOS
   =================================== */

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

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.5s ease;
}