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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* FUNDO ANIMADO COM REDES */
.network-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.network-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Partículas CSS para dispositivos que não suportam Canvas */
.particle {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    pointer-events: none;
}

.particle:nth-child(1) {
    width: 4px;
    height: 4px;
    top: 20%;
    left: 10%;
    animation: float 6s infinite ease-in-out;
}

.particle:nth-child(2) {
    width: 6px;
    height: 6px;
    top: 60%;
    left: 80%;
    animation: float 8s infinite ease-in-out 2s;
}

.particle:nth-child(3) {
    width: 3px;
    height: 3px;
    top: 40%;
    left: 60%;
    animation: float 5s infinite ease-in-out 1s;
}

.particle:nth-child(4) {
    width: 5px;
    height: 5px;
    top: 80%;
    left: 30%;
    animation: float 7s infinite ease-in-out 3s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) translateX(0px);
        opacity: 0.3;
    }
    25% {
        transform: translateY(-20px) translateX(10px);
        opacity: 0.7;
    }
    50% {
        transform: translateY(-10px) translateX(-15px);
        opacity: 0.5;
    }
    75% {
        transform: translateY(-30px) translateX(5px);
        opacity: 0.8;
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
    z-index: 1;
}

header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

h1 {
    color: #2c3e50;
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: #7f8c8d;
    font-size: 1.2rem;
    margin-bottom: 20px;
}

.nav-menu {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.nav-btn {
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    padding: 12px 24px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.nav-btn:hover::before {
    left: 100%;
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.card:hover::before {
    transform: scaleX(1);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.card h2 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.card p {
    color: #555;
    margin-bottom: 15px;
}

.code-preview {
    background: #2c3e50;
    color: #ecf0f1;
    padding: 15px;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    overflow-x: auto;
    margin: 15px 0;
    position: relative;
}

.code-preview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.05) 50%, transparent 70%);
    animation: code-shimmer 3s infinite;
}

@keyframes code-shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.highlight {
    background: linear-gradient(45deg, #667eea20, #764ba220);
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid #667eea;
    margin: 15px 0;
}

.topics-list {
    list-style: none;
}

.topics-list li {
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
    transition: all 0.3s ease;
}

.topics-list li:before {
    content: "🧬";
    position: absolute;
    left: 0;
    transition: transform 0.3s ease;
}

.topics-list li:hover {
    color: #667eea;
    transform: translateX(5px);
}

.topics-list li:hover:before {
    transform: scale(1.2);
}

.footer-custom {
    text-align: center;
    padding: 20px 10px;
    color: white;
    font-weight: bold;
    font-style: italic;
    background: transparent;
    box-shadow: none;
    border: none;
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-menu {
        flex-direction: column;
        align-items: center;
    }
}

/* Efeito de entrada */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

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

.access-button {
    display: inline-block;
    margin-top: 16px;
    padding: 10px 24px;
    background-color: #754FA8; /* lilás médio */
    color: #fff;
    font-weight: 600;
    text-decoration: none;
    border-radius: 10px;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: 0 4px 10px rgba(166, 120, 221, 0.3);
    font-size: 1rem;
}

.access-button:hover {
    background-color: #754FA8;
    transform: translateY(-2px);
}

.home-cards .card {
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.home-cards .card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

h1 a {
    text-decoration: none;
    color: inherit;
    background: linear-gradient(45deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all 0.3s ease;
}

h1 a:hover {
    transform: scale(1.02);
    text-shadow: 0 2px 10px rgba(102, 126, 234, 0.3);
}