:root {
    --primary: #00d8ff;
    --primary-dark: #00a6c7;
    --secondary: #6c63ff;
    --dark: #121212;
    --dark-gray: #1e1e1e;
    --medium-gray: #242424;
    --light-gray: #333;
    --white: #ffffff;
    --text: #e0e0e0;
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

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

body {
    background: var(--dark);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    margin-bottom: 1rem;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header - Melhorias para Mobile */
header {
    background: rgba(30, 30, 30, 0.95);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 216, 255, 0.1);
    transition: var(--transition);
}

.header-container {
    display: flex;
    justify-content: space-around;
    align-items: center;
    width: 100%;
}

header h1 {
    font-size: 1.5rem;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    white-space: nowrap;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

nav ul li a {
    text-decoration: none;
    color: var(--white);
    font-weight: 500;
    font-size: 1rem;
    position: relative;
    padding: 0.5rem 0;
    transition: var(--transition);
    white-space: nowrap;
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

nav ul li a:hover {
    color: var(--primary);
}

nav ul li a:hover::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--white);
    background: none;
    border: none;
    padding: 0.5rem;
    z-index: 1001;
}

/* Hero Section - Otimizado para Mobile */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(18, 18, 18, 0.9) 0%, rgba(30, 30, 30, 0.7) 100%), 
                url('https://images.unsplash.com/photo-1555066931-4365d14bab8c?ixlib=rb-4.0.3&auto=format&fit=crop&w=1950&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    padding: 5rem 0;
    position: relative;
}

.hero-content {
    width: 100%;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

.hero-content h2 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, var(--white), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    margin-bottom: 2rem;
    max-width: 600px;
}

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    border-radius: 2rem;
    transition: var(--transition);
    font-size: 1rem;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background: var(--primary);
    transition: var(--transition);
    z-index: -1;
}

.btn:hover::before {
    width: 100%;
}

.btn:hover {
    color: var(--dark);
}

/* Sobre Mim - Layout Responsivo */
#sobre {
    padding: 5rem 0;
    background: var(--dark-gray);
}

#sobre .container {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.sobre-img {
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 1.25rem 2.5rem rgba(0, 0, 0, 0.4);
}

.sobre-img img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
}

.sobre-img:hover img {
    transform: scale(1.05);
}

.sobre-content h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: 1.5rem;
    position: relative;
}

.sobre-content h2::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 5rem;
    height: 0.25rem;
    background: var(--primary);
    border-radius: 0.125rem;
}

.sobre-content p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.experiencias {
    margin-top: 2rem;
}

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

.experiencia-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.25rem;
    border-radius: 0.625rem;
    margin-bottom: 1rem;
    border-left: 0.1875rem solid var(--primary);
}

.experiencia-item h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.empresa {
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: block;
}

/* Habilidades - Grid Responsivo */
#skills {
    padding: 5rem 0;
    background: var(--dark);
}

#skills h2 {
    text-align: center;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: 3rem;
    position: relative;
}

#skills h2::after {
    content: '';
    position: absolute;
    bottom: -0.75rem;
    left: 50%;
    transform: translateX(-50%);
    width: 5rem;
    height: 0.25rem;
    background: var(--primary);
    border-radius: 0.125rem;
}

.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
    gap: 1.5rem;
}

.skill-card {
    background: var(--dark-gray);
    border-radius: 0.9375rem;
    padding: 1.875rem;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
}

.skill-card:hover {
    transform: translateY(-0.625rem);
    border-color: rgba(0, 216, 255, 0.3);
    box-shadow: 0 0.9375rem 2.5rem rgba(0, 216, 255, 0.1);
}

.skill-icon {
    width: 5rem;
    height: 5rem;
    background: rgba(0, 216, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.25rem;
    color: var(--primary);
    margin: 0 auto 1.25rem;
    transition: var(--transition);
}

.skill-card:hover .skill-icon {
    transform: scale(1.1);
    background: rgba(0, 216, 255, 0.2);
}

.skill-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
    color: var(--white);
}

.skill-bar {
    height: 0.625rem;
    background: var(--light-gray);
    border-radius: 0.3125rem;
    margin: 1.5rem 0 1rem;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--primary);
    border-radius: 0.3125rem;
    position: relative;
    width: 0;
}

.skill-progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: progress-shine 2s infinite;
}

@keyframes progress-shine {
    0% { background-position: -200px 0; }
    100% { background-position: calc(200px + 100%) 0; }
}

/* Projetos - Carrossel Implícito em Mobile */
#projetos {
    padding: 6rem 0;
    padding-bottom: 6rem;
    background: var(--dark-gray);
    position: relative;
}

#projetos h2 {
    text-align: center;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: 4rem;
    position: relative;
    color: var(--white);
}

#projetos h2::after {
    content: '';
    position: absolute;
    bottom: -1.25rem;
    left: 50%;
    transform: translateX(-50%);
    width: 6rem;
    height: 0.3rem;
    background: var(--primary);
    border-radius: 0.25rem;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.projetos-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 360px), 1fr));
    gap: 3rem;
    padding: 0 1.5rem;
}

.projeto-card {
    background: var(--dark);
    border-radius: 1rem;
    padding-bottom: 1rem;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.3);
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.projeto-card:hover {
    transform: translateY(-0.75rem);
    box-shadow: 0 1.5rem 3rem rgba(0, 216, 255, 0.2);
    border-color: rgba(0, 216, 255, 0.3);
}

.projeto-img {
    height: 16rem;
    overflow: hidden;
    position: relative;
}

.projeto-img::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 60%, rgba(0, 0, 0, 0.7));
    z-index: 1;
    opacity: 0;
    transition: var(--transition);
}

.projeto-card:hover .projeto-img::before {
    opacity: 1;
}

.projeto-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.projeto-card:hover .projeto-img img {
    transform: scale(1.08);
}

.projeto-content {
    padding: 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.projeto-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
    color: var(--white);
    position: relative;
    padding-bottom: 0.75rem;
    text-align: center;
}

.projeto-card h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 3rem;
    height: 0.15rem;
    background: var(--primary);
    border-radius: 0.25rem;
    transition: var(--transition);
}

.projeto-card:hover h3::after {
    width: 5rem;
    background: var(--secondary);
}

.projeto-card .descricao {
    font-size: 1.05rem;
    margin-bottom: 1.75rem;
    color: var(--text);
    line-height: 1.7;
    text-align: center;
    padding: 0 0.5rem;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
    justify-content: center;
}

.tech-stack span {
    background: rgba(0, 216, 255, 0.1);
    color: var(--primary);
    padding: 0.5rem 1.1rem;
    border-radius: 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(0, 216, 255, 0.15);
}

.tech-stack span:hover {
    background: rgba(0, 216, 255, 0.2);
    transform: translateY(-0.2rem);
    box-shadow: 0 0.25rem 0.75rem rgba(0, 216, 255, 0.1);
}

.btn-repositorio {
    padding: 0.8rem 1.75rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    border-radius: 2rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    text-align: center;
    margin-top: auto;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
    display: block;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 0.5rem 1rem rgba(0, 216, 255, 0.2);
}

.btn-repositorio::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: 0.5s;
}

.btn-repositorio:hover {
    transform: translateY(-0.2rem);
    box-shadow: 0 0.75rem 1.5rem rgba(0, 216, 255, 0.3);
}

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

/* Responsividade */
@media (max-width: 992px) {
    #projetos {
        padding: 5rem 0;
    }
    
    .projetos-container {
        gap: 2.5rem;
    }
}

@media (max-width: 768px) {
    #projetos h2 {
        margin-bottom: 3.5rem;
    }
    
    .projeto-img {
        height: 14rem;
    }
    
    .projeto-content {
        padding: 1.75rem;
    }
}

@media (max-width: 480px) {
    #projetos {
        padding: 4rem 0;
    }
    
    .projetos-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 0 1rem;
    }
    
    .projeto-card h3 {
        font-size: 1.4rem;
    }
    
    .btn-repositorio {
        padding: 0.7rem 1.5rem;
    }
}

/* Contato - Layout Adaptativo */
#contato {
    padding: 5rem 0 3rem;
    background: var(--dark);
    position: relative;
}

#contato h2 {
    text-align: center;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: 3rem;
    position: relative;
}

#contato h2::after {
    content: '';
    position: absolute;
    bottom: -0.75rem;
    left: 50%;
    transform: translateX(-50%);
    width: 5rem;
    height: 0.25rem;
    background: var(--primary);
    border-radius: 0.125rem;
}

.contato-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.contato-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    order: 2;
}

.contato-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contato-item i {
    min-width: 3rem;
    height: 3rem;
    background: rgba(0, 216, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--primary);
    transition: var(--transition);
}

.contato-item:hover i {
    background: var(--primary);
    color: var(--dark);
    transform: scale(1.1);
}

.contato-item a {
    color: var(--text);
    text-decoration: none;
    font-size: 1.1rem;
    transition: var(--transition);
    word-break: break-all;
}

.contato-item:hover a {
    color: var(--primary);
}

form {
    background: var(--dark-gray);
    padding: 2rem;
    border-radius: 0.9375rem;
    box-shadow: 0 0.9375rem 2.5rem rgba(0, 0, 0, 0.2);
    order: 1;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.9375rem;
    background: var(--medium-gray);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.625rem;
    color: var(--white);
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 0.1875rem rgba(0, 216, 255, 0.2);
}

.form-group textarea {
    min-height: 9.375rem;
    resize: vertical;
}

.footer-bottom {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.9rem;
    color: var(--text);
}

.social-links {
    display: flex;
    gap: 0.75rem;
}

.social-links a {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: var(--medium-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
    font-size: 1.125rem;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary);
    color: var(--dark);
    transform: translateY(-0.3125rem);
}

/* Back to top - Melhor Acessibilidade */
.back-to-top {
    width: 3.125rem;
    height: 3.125rem;
    background: var(--medium-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.25rem;
    transition: var(--transition);
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transform: translateY(1.25rem);
    border: none;
    cursor: pointer;
}

.back-to-top.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary);
    color: var(--dark);
}

/* Media Queries - Breakpoints Estratégicos */
@media (min-width: 576px) {
    .container {
        padding: 0 2rem;
    }
    
    .hero-content {
        padding: 3rem;
    }
    
    .contato-container {
        grid-template-columns: 1fr 1fr;
    }
    
    .contato-info {
        order: 1;
    }
    
    form {
        order: 2;
    }
}

@media (min-width: 768px) {
    #sobre .container {
        flex-direction: row;
        align-items: center;
    }
    
    .sobre-img {
        margin: 0;
    }
    
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

@media (min-width: 992px) {
    .hero-content {
        padding: 7.5rem 3rem;
    }
    
    .projetos-container {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    }
}

/* Menu Mobile - Melhor UX */
@media (max-width: 767px) {
    nav ul {
        position: fixed;
        top: 4.375rem;
        left: 0;
        width: 100%;
        background: var(--dark-gray);
        flex-direction: column;
        padding: 1rem 2rem;
        gap: 1rem;
        transform: translateY(-150%);
        transition: var(--transition);
        box-shadow: 0 0.625rem 1.25rem rgba(0, 0, 0, 0.2);
        z-index: 1000;
        max-height: calc(100vh - 4.375rem);
        overflow-y: auto;
    }
    
    nav ul.active {
        transform: translateY(0);
    }
    
    nav ul li a {
        padding: 0.75rem 0;
        display: block;
    }
    
    .menu-toggle {
        display: block;
    }
    
    /* Melhor espaçamento para mobile */
    section {
        padding: 3rem 0;
    }
    
    /* Ajustes de tamanho de fonte para mobile */
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    /* Formulário mais compacto em mobile */
    form {
        padding: 1.5rem;
    }
}

/* Animação suave para elementos ao rolar */
[data-anime] {
    opacity: 0;
    transition: opacity 0.8s ease, transform 0.8s ease;
}

[data-anime="left"] {
    transform: translate3d(-50px, 0, 0);
}

[data-anime="right"] {
    transform: translate3d(50px, 0, 0);
}

[data-anime="top"] {
    transform: translate3d(0, -50px, 0);
}

[data-anime].animate {
    opacity: 1;
    transform: translate3d(0, 0, 0);
}

/* Melhorias de acessibilidade */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus styles para acessibilidade */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Prevenir zoom em inputs em mobile */
@media (max-width: 480px) {
    input,
    textarea,
    select {
        font-size: 16px !important;
    }
}