@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&display=swap');

:root {
    --bg-color: #0c0c0e;
    --surface-color: #16161a;
    --surface-hover: #1e1e24;
    --primary-color: #e61e25;
    --primary-hover: #c4191f;
    --accent-color: #f7b731; /* Subtle warning/industrial yellow */
    --text-main: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --border-color: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(22, 22, 26, 0.7);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, #fff 0%, #999 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Layout Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section-padding {
    padding: 100px 0;
}

/* Header & Nav */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    transition: var(--transition);
}

header.scrolled {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    transition: var(--transition);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    text-decoration: none;
}

.logo span {
    color: var(--text-main);
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

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

.btn-cta {
    background: var(--primary-color);
    color: #fff;
    padding: 12px 28px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
    transition: var(--transition);
    display: inline-block;
    border: none;
    cursor: pointer;
}

.btn-cta:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(230, 30, 37, 0.3);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.8)), url('hero.png') center/cover no-repeat;
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 5rem);
    line-height: 0.9;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
}

/* Cards & Sections */
.section-title {
    text-align: center;
    margin-bottom: 60px;
}

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

.section-title p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: var(--surface-color);
    padding: 40px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
}

.card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    display: block;
}

.card h3 {
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.card p {
    color: var(--text-secondary);
}

/* Brands Section */
.brands-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 60px;
    flex-wrap: wrap;
    opacity: 0.7;
}

.brand-item {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-muted);
}

/* Contact Section */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info h3 {
    margin-bottom: 30px;
}

.info-item {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
}

.info-item i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.map-container {
    height: 400px;
    border-radius: 12px;
    overflow: hidden;
    filter: grayscale(1) invert(1);
}

/* WhatsApp Float */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: #25d366;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 30px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
    z-index: 1000;
    text-decoration: none;
    transition: var(--transition);
}

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

/* Animations */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* Mobile Responsiveness Improvements */
@media (max-width: 768px) {
    header .container {
        padding: 0 1rem;
    }
    
    nav {
        padding: 15px 0;
    }

    .logo {
        font-size: 1.25rem;
    }

    .btn-cta {
        padding: 10px 18px;
        font-size: 0.75rem;
    }

    .nav-links {
        display: none;
    }

    .hero {
        text-align: center;
        padding-top: 80px;
    }

    .hero-content {
        margin: 0 auto;
    }

    .hero h1 {
        font-size: 3rem;
        margin-bottom: 15px;
    }

    .hero p {
        font-size: 1.1rem;
        margin: 0 auto 30px auto;
    }

    .section-padding {
        padding: 60px 0;
    }

    .section-title h2 {
        font-size: 2rem;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .map-container {
        height: 300px;
    }

    .whatsapp-float {
        width: 50px;
        height: 50px;
        bottom: 20px;
        right: 20px;
        font-size: 24px;
    }
    
    .brands-row {
        gap: 30px;
    }
    
    .brand-item {
        font-size: 1.25rem;
    }
}

/* Hero Sub-pages */
.sub-hero {
    height: 60vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background-size: cover;
    background-position: center;
    margin-top: 80px;
}

.sub-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(0,0,0,0.8), rgba(0,0,0,0.4));
}

.sub-hero .hero-content {
    padding-top: 0;
}

/* Technical Process Section */
.process-step {
    display: flex;
    gap: 60px;
    margin-bottom: 80px;
    align-items: center;
}

.process-step:nth-child(even) {
    flex-direction: row-reverse;
}

.step-number {
    font-size: 8rem;
    font-weight: 800;
    color: var(--primary-color);
    opacity: 0.1;
    line-height: 1;
    min-width: 150px;
}

.step-content h3 {
    font-size: 2.2rem;
    margin-bottom: 20px;
    color: var(--text-main);
}

.step-content p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Product Gallery */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background: var(--surface-color);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.product-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.4);
}

.product-img {
    height: 220px;
    background-size: cover;
    background-position: center;
    border-bottom: 1px solid var(--border-color);
}

.product-info {
    padding: 25px;
}

.product-info h4 {
    margin-bottom: 8px;
    font-size: 1.25rem;
}

.product-info span {
    color: var(--text-muted);
    font-size: 0.9rem;
    display: block;
    margin-bottom: 15px;
}

/* Form Styles for Usinas */
.contact-form {
    background: var(--surface-color);
    padding: 50px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 14px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--surface-hover);
}

@media (max-width: 768px) {
    .process-step, .process-step:nth-child(even) {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }
    
    .step-number {
        font-size: 5rem;
        min-width: auto;
    }
}