/* ==========================================
   WILIAN UHLMANN - LANDING PAGE
   Starfield Effect + Modern Dev Portfolio
   ========================================== */

/* CSS Custom Properties */
:root {
    --color-bg-dark: #0a0a0f;
    --color-bg-gradient-start: #1b2838;
    --color-primary: #64ffda;
    --color-primary-dark: #4fd1c5;
    --color-secondary: #7c3aed;
    --color-text: #e2e8f0;
    --color-text-muted: #94a3b8;
    --color-text-dark: #64748b;
    --color-surface: rgba(255, 255, 255, 0.03);
    --color-surface-hover: rgba(255, 255, 255, 0.06);
    --color-border: rgba(255, 255, 255, 0.1);
    
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background: radial-gradient(ellipse at bottom, var(--color-bg-gradient-start) 0%, var(--color-bg-dark) 100%);
    background-attachment: fixed;
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ==========================================
   SPACE SHOOTER BACKGROUND
   ========================================== */

#game-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ==========================================
   STARFIELD ANIMATION - CSS PURE
   3 layers with parallax effect
   ========================================== */

/* ==========================================
   STARFIELD
   Técnica de radial-gradient com tiling: cobre QUALQUER largura/altura
   de tela (background-repeat: repeat). Os tamanhos de tile (240/360/480)
   dividem 1440 -> a animação faz loop sem saltos nas 3 camadas.
   ========================================== */

.stars, .stars2, .stars3 {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    background-repeat: repeat;
}

/* Layer 1: estrelas pequenas (longe / lento) */
.stars {
    background-image:
        radial-gradient(1px 1px at 24px 38px, rgba(255,255,255,0.85), transparent),
        radial-gradient(1px 1px at 88px 120px, rgba(255,255,255,0.7), transparent),
        radial-gradient(1px 1px at 152px 64px, rgba(255,255,255,0.85), transparent),
        radial-gradient(1px 1px at 208px 176px, rgba(255,255,255,0.6), transparent),
        radial-gradient(1px 1px at 56px 208px, rgba(255,255,255,0.75), transparent),
        radial-gradient(1px 1px at 196px 28px, rgba(255,255,255,0.8), transparent),
        radial-gradient(1px 1px at 120px 232px, rgba(255,255,255,0.6), transparent),
        radial-gradient(1px 1px at 16px 150px, rgba(255,255,255,0.7), transparent);
    background-size: 240px 240px;
    animation: animateStars 150s linear infinite;
}

/* Layer 2: estrelas médias (meio / médio) */
.stars2 {
    background-image:
        radial-gradient(1.5px 1.5px at 40px 60px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 280px 30px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 100px 300px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 320px 220px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 180px 140px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 60px 200px, #fff, transparent);
    background-size: 360px 360px;
    animation: animateStars 100s linear infinite;
}

/* Layer 3: estrelas grandes (perto / rápido) */
.stars3 {
    background-image:
        radial-gradient(2px 2px at 80px 90px, #fff, transparent),
        radial-gradient(2px 2px at 400px 200px, #fff, transparent),
        radial-gradient(2px 2px at 200px 420px, #fff, transparent),
        radial-gradient(2px 2px at 440px 360px, #fff, transparent),
        radial-gradient(2px 2px at 140px 260px, #fff, transparent);
    background-size: 480px 480px;
    animation: animateStars 50s linear infinite;
}

@keyframes animateStars {
    from { background-position: 0 0; }
    to   { background-position: 0 -1440px; }
}

/* ==========================================
   NAVIGATION
   ========================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.logo {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--color-text);
    transition: var(--transition-normal);
}

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

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

.logo-text {
    color: var(--color-text);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: var(--transition-normal);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition-normal);
}

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

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

/* Language Switch */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    margin-left: 1.5rem;
}

.lang-active {
    color: var(--color-primary);
    font-weight: 600;
}

.lang-separator {
    color: var(--color-text-dark);
}

.lang-link {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
}

.lang-link:hover {
    color: var(--color-primary);
}

/* ==========================================
   HERO SECTION
   ========================================== */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 6rem 2rem 2rem;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 800px;
}

.hero-greeting {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
    letter-spacing: 0.1em;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    margin-bottom: 1.5rem;
}

.typing-text {
    font-family: var(--font-mono);
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--color-text-muted);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 500px;
    margin: 0 auto 2rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    padding: 0.875rem 1.75rem;
    border-radius: 4px;
    text-decoration: none;
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-primary:hover {
    background: rgba(100, 255, 218, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(100, 255, 218, 0.2);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1.125rem 2.25rem;
    font-size: 1rem;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    animation: bounce 2s infinite;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-text-muted);
    border-radius: 12px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

.scroll-text {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(10px);
    }
}

/* ==========================================
   SECTIONS
   ========================================== */

.section {
    padding: 6rem 2rem;
    position: relative;
    z-index: 1;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
}

.section-title {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
    max-width: 300px;
}

.section-number {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    color: var(--color-primary);
    font-weight: 400;
}

/* ==========================================
   ABOUT SECTION
   ========================================== */

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
    font-size: 1.0625rem;
    line-height: 1.8;
}

/* Terminal Style */
.about-terminal {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid var(--color-border);
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27ca40; }

.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-left: auto;
}

.terminal-body {
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.terminal-body p {
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.prompt {
    color: var(--color-primary);
    margin-right: 0.5rem;
}

.terminal-body pre {
    margin: 0;
}

.terminal-body code {
    color: var(--color-text);
    line-height: 1.8;
}

/* ==========================================
   PLATFORM SECTION
   ========================================== */

.platform-grid {
    display: flex;
    justify-content: center;
}

.platform-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 3rem;
    transition: var(--transition-normal);
    text-align: center;
    max-width: 500px;
    width: 100%;
}

.platform-card.featured {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, rgba(100, 255, 218, 0.05) 0%, rgba(124, 58, 237, 0.05) 100%);
}

.platform-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(100, 255, 218, 0.1);
}

.platform-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.platform-icon {
    font-size: 3rem;
}

.platform-link {
    color: var(--color-text-muted);
    transition: var(--transition-fast);
    padding: 0.5rem;
}

.platform-link:hover {
    color: var(--color-primary);
}

.platform-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.platform-url {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.platform-description {
    color: var(--color-text-muted);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

/* ==========================================
   ARTICLES SECTION
   ========================================== */

.articles-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.article-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem 2rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: var(--transition-normal);
    cursor: pointer;
    text-decoration: none;
}

.article-item:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-primary);
    transform: translateX(8px);
}

.article-icon {
    flex-shrink: 0;
    width: 2.75rem;
    height: 2.75rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.875rem;
    background: rgba(124, 58, 237, 0.12);
    color: var(--color-secondary);
    transition: var(--transition-fast);
}

.article-icon svg {
    width: 1.375rem;
    height: 1.375rem;
}

.article-item:hover .article-icon {
    background: rgba(124, 58, 237, 0.22);
}

.article-content {
    flex: 1;
}

.article-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
    transition: var(--transition-fast);
}

.article-item:hover .article-title {
    color: var(--color-primary);
}

.article-excerpt {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.article-arrow {
    font-size: 1.25rem;
    color: var(--color-text-dark);
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.article-item:hover .article-arrow {
    color: var(--color-primary);
    transform: translateX(4px);
}

/* ==========================================
   VIDEOS SECTION
   ========================================== */

.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.video-card {
    display: block;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1.5rem;
    transition: var(--transition-normal);
    text-decoration: none;
}

.video-card:hover {
    background: var(--color-surface-hover);
    transform: translateY(-4px);
    border-color: rgba(124, 58, 237, 0.5);
}

.video-icon {
    width: 3rem;
    height: 3rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.875rem;
    background: rgba(124, 58, 237, 0.12);
    color: var(--color-secondary);
    margin-bottom: 1rem;
    transition: var(--transition-normal);
}

.video-icon svg {
    width: 1.5rem;
    height: 1.5rem;
}

.video-card:hover .video-icon {
    background: rgba(124, 58, 237, 0.22);
}

.video-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.5;
    margin-bottom: 1rem;
    transition: var(--transition-fast);
}

.video-card:hover .video-title {
    color: var(--color-primary);
}

.video-type {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-secondary);
    background: rgba(124, 58, 237, 0.15);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    display: inline-block;
}

/* ==========================================
   CONTACT SECTION
   ========================================== */

.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-email {
    font-family: var(--font-mono);
    font-size: clamp(1.25rem, 4vw, 2rem);
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition-normal);
    display: inline-block;
    padding: 1rem 2rem;
    border: 1px solid var(--color-primary);
    border-radius: 8px;
    background: transparent;
}

.contact-email:hover {
    background: rgba(100, 255, 218, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(100, 255, 218, 0.2);
}

/* ==========================================
   FOOTER
   ========================================== */

.footer {
    text-align: center;
    padding: 3rem 2rem;
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--color-border);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.social-link {
    color: var(--color-text-muted);
    transition: var(--transition-normal);
    padding: 0.5rem;
}

.social-link:hover {
    color: var(--color-primary);
    transform: translateY(-3px);
}

.footer-text {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.code-style {
    color: var(--color-primary);
}

.footer-copyright {
    font-size: 0.75rem;
    color: var(--color-text-dark);
}

.footer-cnpj {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-dark);
    margin-top: 0.75rem;
    opacity: 0.7;
}

/* ==========================================
   RESPONSIVE
   ========================================== */

@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero {
        padding: 5rem 1.5rem 2rem;
    }
    
    .section {
        padding: 4rem 1.5rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .videos-grid {
        grid-template-columns: 1fr;
    }
    
    .article-item {
        padding: 1rem 1.5rem;
    }
    
    .article-excerpt {
        display: none;
    }
    
    .platform-card {
        padding: 2rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 250px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.5rem;
        flex-direction: column;
        align-items: flex-start;
    }
    
    .section-title::after {
        width: 100%;
        max-width: 100%;
    }
}

/* ==========================================
   REDUCED MOTION
   ========================================== */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}