/* CSS para página principal do curso */

/* Reset e configurações básicas */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
}

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

/* Header/Hero Section */
.hero {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.9), rgba(118, 75, 162, 0.9));
    color: white;
    padding: 4rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="40" r="3" fill="rgba(255,255,255,0.1)"/><circle cx="40" cy="80" r="2" fill="rgba(255,255,255,0.1)"/></svg>');
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    position: relative;
    z-index: 1;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.stat {
    background: rgba(255,255,255,0.2);
    padding: 1.5rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    min-width: 120px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Main Content */
main {
    background: white;
    margin-top: -50px;
    border-radius: 30px 30px 0 0;
    padding: 3rem 0;
    position: relative;
    z-index: 1;
}

/* Course Intro */
.course-intro {
    margin-bottom: 4rem;
}

.course-intro h2 {
    text-align: center;
    color: #495057;
    margin-bottom: 2rem;
    font-size: 2.2rem;
}

.intro-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.intro-card {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    padding: 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.intro-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.intro-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.intro-card h3 {
    color: #495057;
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.intro-card p {
    color: #6c757d;
    line-height: 1.6;
}

/* Lessons Grid */
.lessons-grid {
    margin-bottom: 4rem;
}

.lessons-grid h2 {
    text-align: center;
    color: #495057;
    margin-bottom: 3rem;
    font-size: 2.2rem;
}

.lessons-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.lesson-card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 2px solid #e9ecef;
    position: relative;
    overflow: hidden;
}

.lesson-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.lesson-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.lesson-card.completed {
    border-color: #28a745;
}

.lesson-card.completed::before {
    background: linear-gradient(135deg, #28a745, #20c997);
}

.lesson-card.final {
    border-color: #ffc107;
}

.lesson-card.final::before {
    background: linear-gradient(135deg, #ffc107, #fd7e14);
}

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

.lesson-number {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.lesson-status {
    font-size: 1.5rem;
}

.lesson-card h3 {
    color: #495057;
    margin-bottom: 1rem;
    font-size: 1.3rem;
    line-height: 1.4;
}

.lesson-card p {
    color: #6c757d;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.lesson-concepts {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.concept {
    background: #e9ecef;
    color: #495057;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.lesson-btn {
    display: inline-block;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 0.8rem 2rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.lesson-btn:hover {
    background: white;
    color: #667eea;
    border-color: #667eea;
    transform: translateY(-2px);
}

/* Course Progress */
.course-progress {
    margin-bottom: 4rem;
    text-align: center;
}

.course-progress h2 {
    color: #495057;
    margin-bottom: 2rem;
    font-size: 2.2rem;
}

.progress-container {
    max-width: 600px;
    margin: 0 auto;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background: #e9ecef;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, #28a745, #20c997);
    transition: width 0.3s ease;
}

.progress-text {
    color: #6c757d;
    font-size: 1.1rem;
    font-weight: 500;
}

/* Resources */
.resources {
    margin-bottom: 4rem;
}

.resources h2 {
    text-align: center;
    color: #495057;
    margin-bottom: 2rem;
    font-size: 2.2rem;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.resource-card {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    border: 2px solid #e9ecef;
    transition: border-color 0.3s ease;
}

.resource-card:hover {
    border-color: #667eea;
}

.resource-card h3 {
    color: #495057;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.resource-card p {
    color: #6c757d;
    margin-bottom: 1.5rem;
}

.resource-link {
    display: inline-block;
    background: #667eea;
    color: white;
    padding: 0.7rem 1.5rem;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.resource-link:hover {
    background: #5a6fd8;
    transform: translateY(-2px);
}

/* Footer */
footer {
    background: #2d3748;
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h4 {
    margin-bottom: 1rem;
    color: #667eea;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #cbd5e0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #667eea;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #4a5568;
    color: #a0aec0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-stats {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .intro-grid {
        grid-template-columns: 1fr;
    }
    
    .lessons-container {
        grid-template-columns: 1fr;
    }
    
    .resources-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .container {
        padding: 0 15px;
    }
}

/* Scroll suave */
html {
    scroll-behavior: smooth;
}

/* Animações adicionais */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.lesson-card {
    animation: fadeInUp 0.6s ease-out;
}

.lesson-card:nth-child(even) {
    animation-delay: 0.1s;
}

.lesson-card:nth-child(odd) {
    animation-delay: 0.2s;
}