/* ===============================================
   ANIMATIONS & TRANSITIONS
   =============================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(30px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

/* Classes de animação */
.fade-in {
    opacity: 0;
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.slide-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.slide-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.slide-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

/* Efeito de animação quando visível */
.fade-in.animate {
    opacity: 1;
}

.slide-up.animate {
    opacity: 1;
    transform: translateY(0);
}

.slide-left.animate {
    opacity: 1;
    transform: translateX(0);
}

.slide-right.animate {
    opacity: 1;
    transform: translateX(0);
}

/* Suaviza as transições após o carregamento */
body:not(.loaded) * {
    transition: none !important;
}

/* ===============================================
   RESET & BASE STYLES
   =============================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family-sans);
    background: var(--bg-dark);
    color: var(--text);
    line-height: var(--line-height-relaxed);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ===============================================
   NAVIGATION
   =============================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

.navbar {
    background: rgba(15, 23, 42, 0.8);
    border-bottom: var(--border-width) solid rgba(71, 85, 105, 0.2);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    transition: var(--transition);
}

.navbar.scrolled {
    padding: var(--spacing-md) 0;
    background: rgba(15, 23, 42, 0.95);
    box-shadow: var(--shadow);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-extrabold);
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo::before {
    content: '✨';
    font-size: var(--font-size-xl);
    line-height: 1;
}

.logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
}

.nav-links a {
    color: var(--text);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: var(--transition-colors);
    position: relative;
}

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

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: calc(-1 * var(--spacing-sm));
    left: 0;
    right: 0;
    height: var(--border-width-thick);
    background: var(--primary);
}

/* ===============================================
   BUTTONS
   =============================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: var(--shadow-primary);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--accent) 100%);
    opacity: 0;
    z-index: -1;
    transition: var(--transition);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary-lg);
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-secondary {
    background: var(--bg-dark-2);
    color: var(--text);
    border: var(--border-width) solid var(--border);
    transition: var(--transition);
}

.btn-secondary:hover {
    background: var(--bg-dark-3);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    border-color: var(--primary);
    color: var(--primary-light);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
}

/* ===============================================
   HERO SECTION
   =============================================== */
.hero {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.1) 0%, rgba(0, 0, 0, 0) 70%);
    pointer-events: none;
    z-index: 0;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #fff 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.05em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Code Window */
.code-window {
    background: var(--dark-2);
    border-radius: var(--rounded-lg);
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(71, 85, 105, 0.3);
    transition: var(--transition);
}

.code-window:hover {
    transform: translateY(-5px);
    box-shadow: 0 30px 60px -12px rgba(16, 185, 129, 0.3);
    border-color: rgba(16, 185, 129, 0.3);
}

.code-header {
    background: var(--dark-3);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border);
}

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

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #22c55e; }

.code-title {
    margin-left: auto;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.code-content {
    padding: 1.5rem;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.8;
    overflow-x: auto;
}

.code-content code {
    color: var(--text);
}

/* Syntax Highlighting */
.keyword { color: #c586c0; }
.variable { color: #9cdcfe; }
.string { color: #ce9178; }
.number { color: #b5cea8; }
.function { color: #dcdcaa; }
.comment { color: #6a9955; }

/* ===============================================
   FEATURES SECTION
   =============================================== */
.features {
    padding: 6rem 0;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--dark-2);
    padding: 2.5rem 2rem;
    border-radius: var(--rounded-lg);
    border: 1px solid rgba(71, 85, 105, 0.2);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    transform: translateY(20px);
    opacity: 0;
    animation: slideUp 0.6s ease-out forwards;
    animation-delay: calc(var(--delay, 0) * 0.1s);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient);
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--primary);
    box-shadow: 0 20px 40px -15px rgba(16, 185, 129, 0.3);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.feature-card p {
    color: var(--text-muted);
    line-height: 1.8;
}

/* ===============================================
   SYNTAX SECTION
   =============================================== */
.syntax-section {
    padding: 6rem 0;
    background: var(--dark-2);
}

.syntax-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.syntax-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.syntax-example {
    background: var(--dark);
    padding: 2rem;
    border-radius: var(--rounded-lg);
    border: 1px solid rgba(71, 85, 105, 0.2);
    transition: var(--transition);
    height: 100%;
}

.syntax-example:hover {
    border-color: var(--primary);
    box-shadow: 0 10px 30px -10px rgba(16, 185, 129, 0.2);
}

.syntax-example h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.syntax-example pre {
    background: var(--dark-3);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.9rem;
}

/* ===============================================
   ARCHITECTURE SECTION
   =============================================== */
.architecture {
    padding: 6rem 0;
}

.architecture h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.arch-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}

.arch-step {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.arch-box {
    background: var(--dark-2);
    padding: 2rem 3rem;
    border-radius: var(--rounded-lg);
    border: 2px solid var(--primary);
    text-align: center;
    min-width: 300px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.arch-box::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    opacity: 0;
    transition: var(--transition);
}

.arch-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px -10px rgba(16, 185, 129, 0.3);
}

.arch-box:hover::after {
    opacity: 1;
}

.arch-box h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

.arch-box p {
    color: var(--text-muted);
}

.arch-arrow {
    font-size: 2rem;
    color: var(--primary);
    margin: 1rem 0;
}

/* ===============================================
   CTA SECTION
   =============================================== */
.cta {
    padding: 8rem 0;
    background: linear-gradient(135deg, var(--dark-2) 0%, var(--dark) 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(16, 185, 129, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

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

/* ===============================================
   FOOTER
   =============================================== */
.footer {
    background: var(--dark-2);
    border-top: 1px solid var(--border);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.footer-section p {
    color: var(--text-muted);
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-section ul li a:hover {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===============================================
   RESPONSIVE
   =============================================== */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .features h2,
    .syntax-section h2,
    .architecture h2,
    .cta h2 {
        font-size: 2rem;
    }
}