/* 
    Ferro Líder Distribuição - Estética Industrial B2B
    Design System
*/

:root {
    --primary-color: #1a1a1b; /* Industrial Black */
    --secondary-color: #333d42; /* Steel Gray */
    --accent-color: #25D366; /* WhatsApp Green */
    --text-color: #2d3436;
    --light-bg: #f4f7f6;
    --white: #ffffff;
    --border-color: #dfe6e9;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--white);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3 {
    text-transform: uppercase;
    font-weight: 800;
    letter-spacing: -0.02em;
}

/* Sections */
section {
    padding: 80px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

/* Hero Section */
.hero {
    position: relative;
    height: 90vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('images/hero_industrial_steel_frame_1775076815393.png');
    background-size: cover;
    background-position: center;
    max-width: 100%;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    margin-bottom: 20px;
    line-height: 1.1;
}

.hero p {
    font-size: 1.4rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background-color: var(--accent-color);
    color: var(--white);
    padding: 18px 36px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(37, 211, 102, 0.2);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(37, 211, 102, 0.3);
    background-color: #20bd5c;
}

/* Grid Layouts */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.card {
    background: var(--white);
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: 8px;
    transition: var(--transition);
}

.card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.card h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

.card ul {
    list-style: none;
}

.card li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.card li:last-child {
    border: none;
}

/* Product Section */
.products-section {
    background-color: var(--light-bg);
    max-width: 100%;
    padding: 100px 20px;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.section-header p {
    color: var(--secondary-color);
}

/* Comparison Section */
.comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.comparison-image img {
    width: 100%;
    border-radius: 12px;
}

/* Advantages */
.advantages-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 40px 0;
}

.advantage-item {
    background: var(--light-bg);
    padding: 20px;
    border-left: 4px solid var(--primary-color);
    font-weight: 600;
}

/* Impact Blocks */
.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.impact-card {
    background: var(--primary-color);
    color: var(--white);
    padding: 30px;
    border-radius: 8px;
}

.impact-card h4 {
    margin-bottom: 10px;
    color: var(--accent-color);
}

/* Supply Models */
.supply-models {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

/* Footer / Contact */
footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 80px 20px 40px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.address-block p {
    margin-bottom: 10px;
    opacity: 0.8;
}

/* Floating WhatsApp */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: var(--accent-color);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    box-shadow: 2px 2px 20px rgba(0,0,0,0.2);
    z-index: 1000;
    transition: var(--transition);
    text-decoration: none;
}

.whatsapp-float:hover {
    transform: scale(1.1);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .comparison, .supply-models, .footer-content {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 3rem;
    }
    
    section {
        padding: 60px 20px;
    }
}