/* ========================================
   ANIMATIONS.CSS - MichelDouglas.dev
   Animações e transições do site
   ======================================== */

/* ========== KEYFRAMES ========== */

/* Animação de Bounce (Scroll Indicator) */
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Animação de Float (Tags Flutuantes) */
@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-15px) rotate(1deg);
    }
    50% {
        transform: translateY(-25px) rotate(-1deg);
    }
    75% {
        transform: translateY(-15px) rotate(1deg);
    }
}

/* Animação de Float Especial para Tag Central */
@keyframes floatCenter {
    0%, 100% {
        transform: translate(-50%, -50%) translateY(0);
    }
    50% {
        transform: translate(-50%, -50%) translateY(-20px);
    }
}

/* Aplicando ao elemento central específico */
.float-tag.tag-2 {
    animation: floatCenter 4s ease-in-out infinite;
}

/* Animação de Fade In Up */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Animação de Fade In */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Animação de Slide In Left */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Animação de Slide In Right */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Animação de Scale In */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Animação de Pulse (Efeito de Destaque) */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
}

/* Animação de Shimmer (Loading Effect) */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

/* Animação de Gradient Shift */
@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* ========== CLASSES DE ANIMAÇÃO ========== */

/* Fade In Up (Padrão para elementos que entram na tela) */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* Delays para animações em sequência */
.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }
.animate-delay-5 { animation-delay: 0.5s; }

/* ========== ANIMAÇÕES ESPECÍFICAS DE SEÇÕES ========== */

/* Hero Animations */
.hero-tag {
    animation: fadeIn 0.6s ease 0s both;
}

.hero h1 {
    animation: fadeInUp 0.7s ease 0.05s both;
}

.hero p {
    animation: fadeInUp 0.7s ease 0.15s both;
}

.hero-cta {
    animation: fadeInUp 0.7s ease 0.25s both;
}

.hero-clients {
    animation: fadeInUp 0.7s ease 0.35s both;
}

.scroll-indicator {
    animation: fadeIn 0.6s ease 0.45s both, bounce 2s infinite 1.2s;
}

/* Portfolio Item Reveal */
.portfolio-item {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

.portfolio-item:nth-child(1) { animation-delay: 0.1s; }
.portfolio-item:nth-child(2) { animation-delay: 0.2s; }
.portfolio-item:nth-child(3) { animation-delay: 0.3s; }
.portfolio-item:nth-child(4) { animation-delay: 0.4s; }
.portfolio-item:nth-child(5) { animation-delay: 0.5s; }
.portfolio-item:nth-child(6) { animation-delay: 0.6s; }

/* Skill Tags Animation */
.skill-tag {
    opacity: 0;
    transform: scale(0.8);
    animation: scaleIn 0.4s ease forwards;
}

.skill-tag:nth-child(1) { animation-delay: 0.1s; }
.skill-tag:nth-child(2) { animation-delay: 0.15s; }
.skill-tag:nth-child(3) { animation-delay: 0.2s; }
.skill-tag:nth-child(4) { animation-delay: 0.25s; }
.skill-tag:nth-child(5) { animation-delay: 0.3s; }
.skill-tag:nth-child(6) { animation-delay: 0.35s; }
.skill-tag:nth-child(7) { animation-delay: 0.4s; }
.skill-tag:nth-child(8) { animation-delay: 0.45s; }

/* Form Focus Animations */
.form-group input:focus,
.form-group textarea:focus {
    animation: pulse 0.3s ease;
}

/* Efeito de ripple nos botões ao passar o mouse */
.btn-primary,
.btn-secondary,
.btn-cta,
.btn-submit {
    position: relative;
    overflow: hidden;
}

.btn-primary::before,
.btn-cta::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn-primary:hover::before,
.btn-cta:hover::before {
    width: 300px;
    height: 300px;
}

/* Estado de Carregamento (skeleton screen) */
.loading {
    position: relative;
    background: linear-gradient(
        90deg,
        #f0f0f0 25%,
        #e0e0e0 50%,
        #f0f0f0 75%
    );
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

/* Texto com gradiente animado (opcional) */
.gradient-text-animated {
    background: linear-gradient(
        90deg,
        var(--primary-accent),
        var(--secondary-accent),
        var(--primary-accent)
    );
    background-size: 200% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 3s ease infinite;
}

/* Barra de progresso de rolagem (opcional) */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--gradient-primary);
    z-index: 9999;
    transform-origin: left;
    transform: scaleX(0);
    transition: transform 0.1s ease;
}

/* Animação do Menu Mobile */
.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translateY(8px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translateY(-8px);
}

/* ========== OTIMIZAÇÕES DE PERFORMANCE ========== */

/* will-change apenas em elementos com animação contínua real */
.float-tag {
    will-change: transform;
}

/* ========== HERO PARTICLES / CONSTELLATION ========== */
/* Substitui o vídeo de fundo — 0KB de download, GPU-friendly */

/* Usa transform (GPU-acelerado) em vez de background-position (CPU)
   Cada blob tem 200×200% centrado — move exatamente 1 tile para loop perfeito */
@keyframes particlesDrift1 {
    from { transform: translate(0, 0); }
    to   { transform: translate(60px, 60px); }
}

@keyframes particlesDrift2 {
    from { transform: translate(0, 0); }
    to   { transform: translate(-130px, 130px); }
}

@keyframes particlesDrift3 {
    from { transform: translate(0, 0); }
    to   { transform: translate(-220px, 220px); }
}

.hero-mesh {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

/* Base dos blobs: 200×200% centrado para não mostrar bordas durante o translate */
.hero-mesh-blob {
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    border-radius: 0;
    filter: none;
    will-change: transform;
}

/* Camada 1: pontos pequenos e densos */
.hero-mesh-blob.blob-1 {
    background-image: radial-gradient(circle, rgba(255, 255, 255, 0.55) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: particlesDrift1 30s linear infinite;
}

/* Camada 2: pontos médios e esparsos, direção oposta */
.hero-mesh-blob.blob-2 {
    background-image: radial-gradient(circle, rgba(255, 255, 255, 0.25) 1.5px, transparent 1.5px);
    background-size: 130px 130px;
    animation: particlesDrift2 45s linear infinite;
}

/* Camada 3: pontos esparsos com cor de destaque */
.hero-mesh-blob.blob-3 {
    background-image: radial-gradient(circle, rgba(241, 19, 72, 0.5) 1.5px, transparent 1.5px);
    background-size: 220px 220px;
    background-position: 50px 80px;
    animation: particlesDrift3 60s linear infinite;
}

/* Remove will-change após a animação para liberar memória GPU */
.animated {
    will-change: auto;
}

/* ========== MOBILE LCP OPTIMIZATION ========== */
/* No mobile (4G lento), animações com fill-mode:both escondem o h1
   até o delay terminar, atrasando o LCP em +400-800ms.
   Desabilitar essas animações no mobile deixa o conteúdo visível
   assim que o CSS carregar, reduzindo LCP de ~4s para ~2s. */
@media (max-width: 1024px) {
    .hero h1 {
        animation: none;
        opacity: 1;
        transform: none;
    }

    .hero p {
        animation: fadeIn 0.4s ease forwards;
    }

    .hero-clients {
        animation: fadeIn 0.5s ease 0.1s forwards;
    }

    .scroll-indicator {
        animation: bounce 2s ease-in-out infinite;
    }
}