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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
}

/* Navbar */
.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background-color: rgba(13, 110, 253, 0.95) !important;
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
}

.navbar-nav .nav-link {
    font-weight: 500;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: #ffc107 !important;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    display: flex;
    align-items: center;
    position: relative;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

.hero-section h1 {
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    animation: fadeInUp 1s ease-out;
}

.hero-section p {
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-section .btn {
    animation: fadeInUp 1s ease-out 0.4s both;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
}

.hero-section .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Tutorial Cards */
.tutorial-card {
    transition: all 0.3s ease;
    border: none;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
}

.tutorial-card.animate {
    animation: slideInUp 0.6s ease-out forwards;
}

.tutorial-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
}

.card-img-top-wrapper {
    height: 200px;
    overflow: hidden;
    position: relative;
}

.card-img-top {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.tutorial-card:hover .card-img-top {
    transform: scale(1.05);
}

.card-body {
    padding: 1.5rem;
}

.card-title {
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 1rem;
}

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

@keyframes slideInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Tutorial Content Page */
.tutorial-content {
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    padding: 2rem;
    margin-top: 2rem;
}

.tutorial-content header h1 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.media-container {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.media-container img,
.media-container video {
    width: 100%;
    height: auto;
    display: block;
}

.content h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    border-bottom: 2px solid #007bff;
    padding-bottom: 0.5rem;
}

.content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #555;
}

/* Buttons */
.btn {
    border-radius: 25px;
    padding: 0.75rem 2rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(45deg, #007bff, #0056b3);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(45deg, #0056b3, #004085);
    transform: translateY(-2px);
}

.btn-light {
    background: rgba(255, 255, 255, 0.9);
    color: #333;
    border: none;
}

.btn-light:hover {
    background: white;
    color: #007bff;
}

/* Footer */
footer {
    background: #2c3e50 !important;
    color: white;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-section {
        background-attachment: scroll;
        min-height: 80vh;
    }
    
    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .tutorial-content {
        padding: 1rem;
        margin-top: 1rem;
    }
    
    .card-img-top-wrapper {
        height: 150px;
    }
}

/* Loading */
.loading {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    z-index: 9999;
    justify-content: center;
    align-items: center;
}

.loading.show {
    display: flex;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Lazy loading images */
img[data-src] {
    opacity: 0;
    transition: opacity 0.3s;
}

img[data-src].loaded {
    opacity: 1;
}