/* Variáveis de Cores - Paleta Minimalista */
:root {
    --primary: #1a1a1a; /* Preto Quase Puro */
    --secondary: #7a7a7a; /* Cinza Médio */
    --accent: #d4d4d4; /* Cinza Claro */
    --text: #333333;
    --white: #ffffff;
    --bg-light: #f9f9f9;
    --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
    font-family: 'Montserrat', sans-serif;
    color: var(--text);
    line-height: 1.8;
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3 {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.5px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul { list-style: none; }

img { max-width: 100%; display: block; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
}

.section { padding: 120px 0; }
.bg-light { background-color: var(--bg-light); }
.text-center { text-align: center; }
.mb-50 { margin-bottom: 50px; }

.subtitle {
    display: block;
    text-transform: uppercase;
    letter-spacing: 4px;
    font-size: 0.75rem;
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: 15px;
}

/* Botões */
.btn {
    display: inline-block;
    background-color: var(--primary);
    color: var(--white);
    padding: 18px 45px;
    border-radius: 0;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.8rem;
    border: 1px solid var(--primary);
    cursor: pointer;
}

.btn:hover {
    background-color: transparent;
    color: var(--primary);
}

.btn-full { width: 100%; }

/* Header */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 40px 0;
    transition: var(--transition);
}

header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    padding: 20px 0;
    box-shadow: 0 1px 0px rgba(0,0,0,0.05);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
}

.logo span { color: var(--secondary); font-weight: 400; }

.nav-links { display: flex; }
.nav-links li { margin-left: 50px; }
.nav-links a {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
}

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

/* Hero */
.hero {
    height: 100vh;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    color: var(--white);
}

.hero-content h1 {
    font-size: 4.5rem;
    margin-bottom: 20px;
    color: var(--white);
    line-height: 1.1;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 45px;
    max-width: 600px;
    font-weight: 300;
}

/* Grids */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

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

/* Estilo de Imagem */
.img-arch {
    filter: grayscale(100%);
    transition: var(--transition);
}

.img-arch:hover {
    filter: grayscale(0%);
}

.list-arch li {
    margin-bottom: 15px;
    padding-left: 30px;
    position: relative;
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.list-arch li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 15px;
    height: 1px;
    background-color: var(--primary);
}

/* Project Cards */
.project-card {
    background: var(--white);
    overflow: hidden;
    transition: var(--transition);
}

.project-card img {
    width: 100%;
    height: 450px;
    object-fit: cover;
    filter: grayscale(100%);
    transition: var(--transition);
}

.project-card:hover img {
    filter: grayscale(0%);
    transform: scale(1.05);
}

.project-info { padding: 25px 0; }
.project-info h3 { font-size: 1.2rem; margin-bottom: 10px; }
.project-info p { font-size: 0.85rem; color: var(--secondary); }

/* Formulário */
.arch-form input, 
.arch-form select, 
.arch-form textarea {
    width: 100%;
    padding: 15px 0;
    margin-bottom: 30px;
    border: none;
    border-bottom: 1px solid var(--accent);
    background: transparent;
    font-family: inherit;
    outline: none;
    transition: var(--transition);
}

.arch-form input:focus, 
.arch-form select:focus, 
.arch-form textarea:focus {
    border-bottom-color: var(--primary);
}

.contact-box p { margin-bottom: 20px; }

/* Footer */
footer {
    background: var(--primary);
    color: var(--accent);
    padding: 100px 0 40px;
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    margin-bottom: 60px;
}

.footer-links a { margin-left: 40px; font-size: 0.75rem; letter-spacing: 1px; }

.copyright { font-size: 0.7rem; border-top: 1px solid #333; padding-top: 40px; }

/* Mobile Menu Icon */
.mobile-menu-icon { display: none; cursor: pointer; }
.mobile-menu-icon div {
    width: 25px;
    height: 1px;
    background-color: var(--primary);
    margin: 8px;
    transition: var(--transition);
}

/* Responsividade */
@media (max-width: 992px) {
    .hero-content h1 { font-size: 3.2rem; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; gap: 60px; }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        right: 0;
        top: 0;
        height: 100vh;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transform: translateX(100%);
        transition: transform 0.6s cubic-bezier(0.77, 0, 0.175, 1);
    }

    .nav-links li { margin: 25px 0; margin-left: 0; }
    .mobile-menu-icon { display: block; }
    .nav-active { transform: translateX(0); }
    .footer-grid { flex-direction: column; text-align: center; }
    .footer-links { margin-top: 40px; }
    .footer-links a { margin: 0 15px; }
}