/*
Theme Name: LUVA Engenharia
Theme URI: http://luvaconstroi.com.br/
Author: Gemini AI
Author URI: https://gemini.google.com/
Description: Tema personalizado para a LUVA Engenharia e Arquitetura, focado em performance, elegância e design minimalista, inspirado na referência do cliente.
Version: 6.0
*/

/*
 * LUVΛ Engenharia e Arquitetura - Stylesheet v6.0
 * Diretor de Arte & Frontend: Gemini CLI
 * Conceito: Identidade LUVA-Oak (Minimalismo, Animação e Sofisticação)
 */

/* --- 1. RESET & DEFINIÇÕES GLOBAIS --- */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600&display=swap');

:root {
    --color-background: #FFFFFF;
    --color-text: #222222;
    --color-accent: #B8860B;
    --color-border: #EAEAEA;
    --color-dark-background: #111111;
    --color-light-text: #FFFFFF;

    --font-main: 'Poppins', sans-serif;

    --container-width: 1300px;
    --section-padding: 8rem 0;
    --transition-main: 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background-color: var(--color-background);
    line-height: 1.7;
    font-weight: 300;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: var(--section-padding);
}

h1, h2, h3, h4 {
    font-weight: 500;
    line-height: 1.3;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); margin-bottom: 1rem; font-weight: 600; }
h2 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 4rem; text-align: center; font-weight: 500; }
h3 { font-size: 1.4rem; margin-bottom: 1rem; font-weight: 600; }

a {
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-accent);
}

/* --- 2. ANIMAÇÕES E HEADER --- */

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.main-header {
    background-color: transparent;
    padding: 2rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: background-color 0.4s ease, padding 0.4s ease, box-shadow 0.4s ease;
}

.main-header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 1.5rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    line-height: 1; /* Remove extra space */
}

.logo img {
    width: 180px;
    height: auto; /* Maintain aspect ratio */
    transition: opacity 0.3s ease;
}

.logo img:hover {
    opacity: 0.9;
}

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 2.5rem;
}

.main-nav a {
    font-weight: 500;
    font-size: 1rem;
    padding-bottom: 0.25rem;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s ease;
}

.main-nav a:hover {
    border-color: var(--color-accent);
}

/* --- 3. SEÇÕES --- */

/* HERO */
#hero {
    color: var(--color-light-text);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-size: cover;
    background-position: center;
    position: relative;
    padding: 0;
}

#hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.6), rgba(0,0,0,0.2));
    z-index: 1;
}

#hero .container {
    position: relative;
    z-index: 2;
}

#hero h1 {
    color: var(--color-light-text);
    font-size: clamp(3rem, 6vw, 5.5rem);
    font-weight: 600;
    text-shadow: 0 2px 15px rgba(0,0,0,0.3);
}

/* PORTFOLIO */
#portfolio h2 {
    text-align: left;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 2rem;
}

.portfolio-item {
    overflow: hidden;
    position: relative;
}

.portfolio-item img {
    width: 100%;
    display: block;
    transition: transform var(--transition-main);
}

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

.portfolio-item .overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1.5rem;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    color: var(--color-light-text);
    transform: translateY(100%);
    transition: transform var(--transition-main);
}

.portfolio-item:hover .overlay {
    transform: translateY(0);
}

.portfolio-item .overlay h3 {
    color: var(--color-light-text);
    font-size: 1.2rem;
}

/* Grid layout inspired by Oak */
.portfolio-item-1 { grid-column: 1 / 8; }
.portfolio-item-2 { grid-column: 8 / 13; }
.portfolio-item-3 { grid-column: 1 / 5; }
.portfolio-item-4 { grid-column: 5 / 13; }


/* SERVIÇOS */
#servicos {
    background-color: #f9f9f9;
}

#servicos .container {
    max-width: 1100px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    text-align: center;
}

.service-item h3 {
    color: var(--color-accent);
}

/* TESTIMONIALS */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    max-width: 1100px;
    margin: 0 auto;
}

.testimonial-card {
    font-style: italic;
    font-size: 1.1rem;
}

.testimonial-card .author {
    font-style: normal;
    font-weight: 500;
    margin-top: 1rem;
    text-align: right;
}

/* FOOTER */
.main-footer {
    padding: 5rem 0;
    background-color: var(--color-dark-background);
    color: rgba(255,255,255,0.7);
}

.main-footer .container {
    text-align: center;
}

.main-footer h3 {
    color: var(--color-light-text);
    font-weight: 400;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 2rem;
}

.main-footer a {
    color: rgba(255,255,255,0.7);
}

.main-footer a:hover {
    color: var(--color-accent);
}

.social-links {
    margin: 2rem 0;
}

.social-links a {
    margin: 0 1rem;
    font-weight: 500;
    color: var(--color-light-text);
}

.footer-bottom {
    margin-top: 3rem;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.4);
}

/* --- RESPONSIVIDADE --- */
@media (max-width: 768px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    .portfolio-item-1, .portfolio-item-2, .portfolio-item-3, .portfolio-item-4 {
        grid-column: 1 / -1;
    }

    /* Mobile menu would need JS, placeholder styles */
    .main-nav {
        display: none; /* Simplified for example */
    }
}