:root {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --text-secondary: #57606a;
    --accent-color: #0077ff;
    --card-bg: #f6f8fa;
    --card-hover-bg: #f0f2f5;
    --border-color: #d0d7de;
    --nav-bg: #ffffff;
    --btn-text-on-accent: #ffffff;
    --shadow: rgba(0, 0, 0, 0.1);
    --font-main: "Inter", sans-serif;
    --sombra-btn: 0 5px 15px rgba(0, 119, 255, 0.4);

    /* Cores das seções de projetos */
    --color-ciencia: #00e676;
    --color-redes: #9c27b0;
    --color-dev: #FF5F00;
    --color-algoritmos: #FFF197;
    --color-pesquisa:#FF0007;
}

[data-theme="dark"] {
    --bg-color: #0a0e14;
    --text-color: #e6edf3;
    --text-secondary: #9da5b4;
    --accent-color: #00f2ff;
    --card-bg: #161b22;
    --card-hover-bg: #1c2128;
    --border-color: #30363d;
    --nav-bg: #0d1117;
    --btn-text-on-accent: #0a0e14;
    --shadow: rgba(0, 0, 0, 0.6);
    --sombra-btn: 0 5px 15px rgba(255, 255, 255, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

/* Utilitários */
.container {
    padding: 4rem 2rem 0;
    max-width: 1200px;
    margin: 0 auto;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    color: var(--text-color);
}

h2::after {
    content: "";
    display: block;
    width: 60px;
    height: 4px;
    background: var(--accent-color);
    margin: 10px auto 0;
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s;
}

/* =========================================
   2. NAVBAR
   ========================================= */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 5%;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: background 0.3s ease;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-color);
    letter-spacing: -0.5px;
}

.logo::after {
    content: ".";
    color: var(--accent-color);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    list-style: none;
}

.btn-tradutor {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 0 0 5px;
    transition: color 0.3s ease;
}

.btn-tradutor::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 3px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

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

.btn-tradutor:hover::after {
    width: 100%;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    position: relative;
    padding-bottom: 5px;
}

.nav-links a::after {
    content: "";
    position: absolute;
    width: 0;
    height: 3px;
    bottom: 0;
    left: 0;
    background-color: var(--accent-color);
    transition: width 0.3s ease;
}

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.theme-btn,
.hamburger-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    transition: 0.3s;
}

.theme-btn {
    font-size: 1.2rem;
}

.hamburger-btn {
    display: none;
}

.theme-btn:hover,
.hamburger-btn:hover {
    background: var(--bg-color);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* =========================================
   3. HERO SECTION
   ========================================= */
.hero {
    min-height: 95vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: var(--bg-color);
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    align-items: center;
    gap: 4rem;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero-text h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.highlight {
    background: linear-gradient(
        200deg,
        transparent 0%,
        var(--accent-color) 0%,
        var(--accent-color) 90%,
        transparent 90%
    );
    color: var(--btn-text-on-accent);
}

.hero-text p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 550px;
}

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

.btn {
    display: inline-block;
    background: var(--accent-color);
    color: var(--btn-text-on-accent);
    padding: 0.8rem 2rem;
    border-radius: 4px;
    font-weight: 700;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 2px solid var(--accent-color);
}

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

.btn-outline {
    display: inline-block;
    border: 2px solid var(--text-color);
    padding: 0.8rem 2rem;
    border-radius: 4px;
    color: var(--text-color);
    font-weight: 700;
}

.btn-outline:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: var(--btn-text-on-accent);
}

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

.img-placeholder {
    width: 350px;
    height: 350px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.core {
    position: absolute;
    width: 24px;
    height: 24px;
    background-color: var(--accent-color);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--accent-color);
    animation: pulseCore 3s ease-in-out infinite alternate;
    z-index: 10;
}

.orbit {
    position: absolute;
    border-radius: 50%;
    border: 1px solid var(--text-secondary);
    opacity: 0.3;
    animation: spinOrbit linear infinite;
}

.orbit-1 {
    width: 140px;
    height: 140px;
    animation-duration: 8s;
}

.orbit-2 {
    width: 240px;
    height: 240px;
    border-style: dashed;
    animation-duration: 15s;
    animation-direction: reverse;
}

.orbit::before {
    content: "";
    position: absolute;
    width: 10px;
    height: 10px;
    background-color: var(--accent-color);
    border-radius: 50%;
    top: -5px;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 10px var(--accent-color);
}

@keyframes pulseCore {
    0% {
        transform: scale(0.9);
        box-shadow: 0 0 10px var(--accent-color);
    }
    100% {
        transform: scale(1.2);
        box-shadow: 0 0 25px var(--accent-color), 0 0 40px rgba(0, 119, 255, 0.2);
    }
}

@keyframes spinOrbit {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* F1 Telemetry Hero — apenas a animação (sem legenda/emblemas) */
.f1-telemetry {
    width: 360px;
    height: 360px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.f1-track-svg {
    width: 100%;
    max-width: 340px;
    height: auto;
    display: block;
    overflow: visible;
    filter: drop-shadow(0 10px 28px var(--shadow));
}

.track-line {
    animation: dashMove 1.1s linear infinite;
}

@keyframes dashMove {
    to {
        stroke-dashoffset: -32;
    }
}

/* =========================================
   4. PROJETOS
   ========================================= */

/* Título Geral */
#projetos > h2:first-of-type {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 8px;
}

#projetos > h2:first-of-type::after {
    content: "";
    display: block;
    width: 100%;
    height: 4px;
    background-color: var(--accent-color);
    position: absolute;
    bottom: 0;
    left: 0;
    margin: 0;
}

/* Títulos por Seção */
#projetos h2:not(:first-of-type) {
    text-align: left;
    margin-bottom: 2rem;
    position: relative;
    padding-bottom: 8px;
}

#projetos h2:not(:first-of-type)::after {
    content: "";
    display: block;
    width: 100%;
    height: 3px;
    position: absolute;
    bottom: 0;
    left: 0;
}

#projetos h2:nth-of-type(2)::after { background-color: var(--color-ciencia); }
#projetos h2:nth-of-type(3)::after { background-color: var(--color-redes); }
#projetos h2:nth-of-type(4)::after { background-color: var(--color-dev); }
#projetos h2:nth-of-type(5)::after { background-color: var(--color-algoritmos); }
#projetos h2:nth-of-type(6)::after { background-color: var(--color-pesquisa);}

/* Mapeamento de cor dinâmica por seção nos cards */
.ciencia-dados { --card-accent: var(--color-ciencia); }
.redes-neurais { --card-accent: var(--color-redes); }
.desenvolvimento { --card-accent: var(--color-dev); }
.algoritmos { --card-accent: var(--color-algoritmos); }
.pesquisa { --card-accent: var(--color-pesquisa);}

.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 3.5rem;
}

/* Card Base */
.project-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 8px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: background 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
    border-left: 4px solid var(--card-accent, var(--accent-color));
}

.project-card:hover {
    transform: translateY(-4px);
    background: var(--card-hover-bg);
    box-shadow: 0 10px 25px var(--shadow);
}

/* Animações de Borda no Hover */
.project-card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 8px;
    border: 1px solid var(--card-accent, var(--accent-color));
    border-left: none;
    clip-path: inset(0 100% 0 0);
    pointer-events: none;
    transition: clip-path 0.4s ease-in-out;
}

.project-card:hover::before {
    clip-path: inset(0 0 0 0);
}
.project-card:hover::after { height: 100%; }

/* Conteúdo do Card */
.project-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.project-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 2rem;
}

.tech-stack span {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}

.links {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    margin-top: auto;
}

.codigo_link {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* Estilo dos links de código */
.codigo_link a {
    color: var(--text-color);
    font-size: 0.9rem;
    font-weight: 700;
    padding: 2px 4px;

    border-radius: 4px;
    border-bottom: 2px solid var(--card-accent, var(--accent-color));

    transition: all 0.3s ease;
}

.btn_pagina {
    margin-left: auto;
    background: transparent;
}

.btn_pagina a {
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 0;
    margin: 0;
    background: transparent !important;
    border: none !important;
    border-bottom: none !important;
    box-shadow: none !important;
    border-radius: 50%;
    color: var(--text-color);
    transition: color 0.3s ease;
}

.btn_pagina a:hover {
    background: transparent !important;
    color:var(--text-color);
    box-shadow: none !important;
}

/* Circunferência */
.circle-border {
    position: absolute;
    inset: 0;

    width: 100%;
    height: 100%;

    fill: none;
    stroke: var(--card-accent, var(--accent-color));
    stroke-width: 2;

    /* Comprimento da circunferência */
    stroke-dasharray: 126;
    stroke-dashoffset: 126;

    transform: rotate(-90deg);
    transform-origin: center;

    transition: stroke-dashoffset 0.6s ease;
}

/* Seta */
.arrow {
    position: relative;
    z-index: 2;
}

/* Hover: desenha a circunferência */
.btn_pagina a:hover .circle-border {
    stroke-dashoffset: 0;
}

/* Cor da seta */
.btn_pagina a:hover {
    color: var(--card-accent, var(--accent-color));
}


.links .codigo_link a:hover {background-color: var(--accent-color); color:var(--text-color);}
.ciencia-dados .links a:hover { background-color: var(--color-ciencia); color:var(--text-color); }
.redes-neurais .links a:hover { background-color: var(--color-redes); color:var(--text-color)s; }
.desenvolvimento .links a:hover { background-color: var(--color-dev); color:var(--text-color); }
.algoritmos .links a:hover { background-color: var(--color-algoritmos); color:var(--text-color); }
.pesquisa .links a:hover { background-color: var(--color-pesquisa); color:var(--text-color); }


/* =========================================
   5. CONTATO E FOOTER
   ========================================= */
.contact-section {
    text-align: center;
    padding: 4rem 0 6rem;
    background: var(--bg-color);
}

.contact-section h2 {
    position: relative;
    padding-bottom: 8px;
    margin-bottom: 1.5rem;
}

.contact-section h2::after {
    content: "";
    display: block;
    width: 100%;
    height: 4px;
    background-color: var(--accent-color);
    position: absolute;
    bottom: 0;
    left: 0;
    margin: 0;
}

.contact-section p {
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

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

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

/* =========================================
   6. RESPONSIVIDADE (MOBILE)
   ========================================= */
@media (max-width: 900px) {
    .hero h1 { font-size: 2.5rem; }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }

    .hero-text p { margin: 0 auto 2rem; }
    .hero-buttons { justify-content: center; }

    .img-placeholder {
        width: 250px;
        height: 250px;
        margin: 0 auto;
    }

    .f1-telemetry {
        width: 280px;
        height: 280px;
        margin: 0 auto;
    }

    .f1-track-svg {
        max-width: 260px;
    }
}

@media (max-width: 768px) {
    .navbar { padding: 1rem 5%; }
    .hamburger-btn { display: flex; }

    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 75px;
        right: 5%;
        background: var(--nav-bg);
        border: 1px solid var(--border-color);
        border-radius: 8px;
        padding: 1.5rem;
        gap: 1.5rem;
        box-shadow: 0 10px 30px var(--shadow);
        width: 200px;
        z-index: 1000;
    }

    .nav-links.active {
        display: flex;
        animation: slideDown 0.3s ease forwards;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .hero { padding-top: 140px; }
}

@media (max-width: 700px) {
    .social-links {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
        width: 100%;
        max-width: 400px;
        margin: 0 auto;
    }

    .social-links a {
        width: 100%;
        text-align: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    .track-line {
        animation: none !important;
    }
}