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

:root {
    /* Paleta Dark Premium */
    --bg-dark: #070707;
    --bg-light-dark: #121212;
    --text-main: #EAEAEA;
    --text-muted: #888888;
    --accent: #333333; /* Pode ser alterado para a cor de destaque da marca */
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

h2 {
    font-size: 2.5rem;
    font-weight: 300;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 15px;
}

/* HERO SECTION */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: radial-gradient(circle at center, #1a1a1a 0%, var(--bg-dark) 70%);
}

.hero-logo {
    max-width: 400px;
    margin-bottom: 40px;
    /* Adicione um filtro caso o placeholder fique estranho: filter: invert(1); */
}

.hero h1 {
    font-size: 1.5rem;
    font-weight: 400;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--text-main);
    margin-bottom: 10px;
}

.hero .subtitle {
    font-size: 1rem;
    letter-spacing: 2px;
}

/* SEÇÃO: CONCEITO */
.concept {
    padding: 100px 0;
    background-color: var(--bg-light-dark);
    text-align: center;
}

.section-description {
    max-width: 600px;
    margin: 0 auto 60px auto;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.card {
    padding: 40px 20px;
    border-top: 1px solid var(--accent);
    text-align: left;
}

.card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-main);
}

.card p {
    font-size: 1rem;
}

/* SEÇÃO: O SÍMBOLO */
.symbol {
    padding: 120px 0;
}

.symbol-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}

.symbol-text {
    flex: 1;
}

.symbol-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.placeholder-box {
    width: 350px;
    height: 350px;
    background-color: var(--bg-light-dark);
    border: 1px dashed var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* SEÇÃO: A HISTÓRIA */
.history {
    padding: 100px 0;
    background-color: var(--bg-light-dark);
}

.history-content {
    max-width: 800px;
    border-left: 2px solid var(--accent);
    padding-left: 30px;
}

/* FOOTER */
footer {
    padding: 80px 0;
    text-align: center;
    border-top: 1px solid var(--accent);
}

.footer-logo {
    font-weight: 600;
    letter-spacing: 5px;
    margin-bottom: 10px;
    font-size: 1.5rem;
}

.contact-info {
    font-size: 0.9rem;
    margin-top: 20px;
}

/* RESPONSIVIDADE BÁSICA */
@media (max-width: 768px) {
    .symbol-wrapper {
        flex-direction: column;
    }
    h2 {
        font-size: 2rem;
    }
    .hero-logo {
        max-width: 250px;
    }
}

/* =========================================
   HEADER FIXO E ANIMAÇÃO DA LOGO
   ========================================= */
#main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 30px 0;
    z-index: 1000;
    transition: all 0.5s cubic-bezier(0.25, 1, 0.5, 1);
    /* Fundo transparente no topo */
    background-color: transparent; 
}

/* Quando a página é rolada (classe injetada pelo JS) */
#main-header.scrolled {
    padding: 15px 0;
    /* Fundo sólido e escuro quando rolar a página */
    background-color: rgba(7, 7, 7, 0.95); 
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.header-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* =========================================
   ANIMAÇÃO DE TROCA DAS LOGOS (CROSSFADE)
   ========================================= */
.logo-link {
    position: relative;
    display: block;
    height: 35px; /* Altura da sua logo no menu */
}

.logo-full, .logo-icon {
    height: 100%;
    width: auto;
    transition: opacity 0.5s cubic-bezier(0.25, 1, 0.5, 1), transform 0.5s cubic-bezier(0.25, 1, 0.5, 1);
}

/* O símbolo "F" começa invisível, posicionado por cima */
.logo-icon {
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
    transform: scale(0.8);
}

/* === ANIMAÇÃO NO SCROLL === */
#main-header.scrolled .logo-full {
    opacity: 0;
    transform: translateX(-20px);
    pointer-events: none; 
}

#main-header.scrolled .logo-icon {
    opacity: 1;
    transform: scale(1) translateX(0);
}

/* NAVEGAÇÃO */
.header-nav {
    display: flex;
    gap: 30px;
}

.header-nav a {
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 1px;
    transition: color 0.3s ease;
}

.header-nav a:hover {
    color: #ffffff;
}

/* Esconde o menu no celular para ficar mais limpo */
@media (max-width: 768px) {
    .header-nav {
        display: none;
    }
}