:root {
    --primary-color: #6c5ce7;
    --secondary-color: #a29bfe;
    --dark-color: #2d3436;
    --darker-color: #1e272e;
    --light-color: #f5f6fa;
    --accent-color: #00cec9;
    --error-color: #d63031;
    --success-color: #00b894;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--darker-color);
    color: var(--light-color);
    line-height: 1.6;
}

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

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    font-size: 2rem;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

.logo span {
    color: var(--primary-color);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

nav a {
    color: var(--light-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    padding: 5px 0;
    position: relative;
}

nav a:hover {
    color: var(--primary-color);
}

nav a.active {
    color: var(--primary-color);
}

nav a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

.hero {
    text-align: center;
    padding: 60px 0 40px;
}

.hero-content h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-content p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 30px;
}

.search-container {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    gap: 10px;
}

.search-container input {
    flex: 1;
    padding: 15px 20px;
    border: none;
    border-radius: 50px;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--light-color);
    font-size: 1rem;
    outline: none;
    transition: all 0.3s;
}

.search-container input:focus {
    background-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.3);
}

.search-container button {
    padding: 0 30px;
    border: none;
    border-radius: 50px;
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.search-container button:hover {
    background-color: #5649c0;
    transform: translateY(-2px);
}

.loading-section {
    text-align: center;
    padding: 50px 0;
}

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

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.result-section {
    margin-top: 40px;
    display: none;
}

.lesson-controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 30px;
}

.lesson-controls button {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.lesson-controls button:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.lesson-controls button i {
    font-size: 0.9rem;
}

.slideshow-container {
    background-color: var(--dark-color);
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    min-height: 500px;
    position: relative;
}

.slide {
    display: none;
    animation: fade 0.5s ease-in-out;
}

@keyframes fade {
    from { opacity: 0.4; }
    to { opacity: 1; }
}

.slide.active {
    display: block;
}

.slide h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.slide-content {
    line-height: 1.8;
}

.slide-content p {
    margin-bottom: 15px;
}

.slide-content ul, .slide-content ol {
    margin: 15px 0 15px 30px;
}

.slide-image {
    max-width: 100%;
    height: auto;
    border-radius: 5px;
    margin: 20px 0;
    display: block;
}

.slide-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
}

.slide-navigation button {
    padding: 8px 20px;
    border: none;
    border-radius: 5px;
    background-color: var(--primary-color);
    color: white;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.slide-navigation button:hover {
    background-color: #5649c0;
}

.slide-navigation button:disabled {
    background-color: rgba(108, 92, 231, 0.5);
    cursor: not-allowed;
}

#slide-counter {
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
}

.popular-topics {
    margin: 60px 0;
    text-align: center;
}

.popular-topics h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--accent-color);
}

.topic-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
}

.topic-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 50px;
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--light-color);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.topic-btn:hover {
    background-color: rgba(108, 92, 231, 0.2);
    transform: translateY(-2px);
}

footer {
    text-align: center;
    padding: 30px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 60px;
}

footer p {
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 15px;
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.social-icons a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 1.2rem;
    transition: color 0.3s;
}

.social-icons a:hover {
    color: var(--primary-color);
}

/* Responsividade */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 20px;
    }
    
    nav ul {
        gap: 15px;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .search-container {
        flex-direction: column;
    }
    
    .search-container button {
        justify-content: center;
        padding: 15px;
    }
    
    .topic-buttons {
        gap: 10px;
    }
    
    .topic-btn {
        padding: 8px 15px;
        font-size: 0.9rem;
    }
}

.hidden {
    display: none !important;
}