/* ===================================
   VARIÁVEIS CSS - Cores e Configurações
   =================================== */
:root {
    /* Tema Escuro (padrão) */
    --bg-primary: #0f0f1e;
    --bg-secondary: #1a1a2e;
    --bg-card: #16213e;
    --text-primary: #ffffff;
    --text-secondary: #a8b2d1;
    --accent: #00d4ff;
    --accent-hover: #00b8e6;
    --border: rgba(255, 255, 255, 0.1);
    
    /* Espaçamentos */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Fontes */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    
    /* Transições */
    --transition: all 0.3s ease;
}

/* Tema Claro */
body.light-theme {
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --text-primary: #1a1a2e;
    --text-secondary: #4a5568;
    --accent: #0066cc;
    --accent-hover: #0052a3;
    --border: rgba(0, 0, 0, 0.1);
}

/* ===================================
   RESET E ESTILOS GLOBAIS
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   CABEÇALHO E NAVEGAÇÃO
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-sm) 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}

.nav {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--accent);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

/* Botão de Alternância de Tema */
.theme-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 50px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition);
}

.theme-toggle:hover {
    transform: scale(1.1);
    border-color: var(--accent);
}

/* ===================================
   SEÇÃO HERO
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--accent) 0%, var(--text-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   SEÇÕES GERAIS
   =================================== */
.section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

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

/* ===================================
   SEÇÃO SOBRE
   =================================== */
.about {
    background-color: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-image {
    display: flex;
    justify-content: center;
}

.profile-img {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: 20px;
    border: 3px solid var(--accent);
    box-shadow: 0 10px 40px rgba(0, 212, 255, 0.2);
}

.about-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

/* ===================================
   SEÇÃO PROJETOS
   =================================== */
.projects {
    background-color: var(--bg-primary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.project-card {
    background-color: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: 15px;
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), transparent);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent);
    box-shadow: 0 10px 40px rgba(0, 212, 255, 0.2);
}

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

.project-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent);
    opacity: 0.2;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.project-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.project-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: var(--transition);
}

.project-link:hover {
    color: var(--accent-hover);
    gap: var(--spacing-sm);
}

/* ===================================
   SEÇÃO CONTATO
   =================================== */
.contact {
    background-color: var(--bg-secondary);
    text-align: center;
}

.contact-subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-card);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 50px;
    border: 1px solid var(--border);
    transition: var(--transition);
    font-weight: 600;
}

.social-link:hover {
    background-color: var(--accent);
    color: var(--bg-primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

/* ===================================
   RODAPÉ
   =================================== */
.footer {
    background-color: var(--bg-primary);
    padding: var(--spacing-md) 0;
    text-align: center;
    border-top: 1px solid var(--border);
}

.footer p {
    color: var(--text-secondary);
}

/* ===================================
   ANIMAÇÕES
   =================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   RESPONSIVIDADE
   =================================== */
@media (max-width: 768px) {
    .header .container {
        flex-wrap: wrap;
    }
    
    .nav {
        order: 3;
        width: 100%;
        justify-content: center;
        margin-top: var(--spacing-sm);
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .social-links {
        flex-direction: column;
        align-items: center;
    }
}