/* ==========================================================================
   CSS Variables & Tokens
   ========================================================================== */
:root {
    /* Colors */
    --clr-primary: #b91c1c; /* Deep Red */
    --clr-primary-dark: #991b1b;
    --clr-primary-light: #fef2f2;
    --clr-secondary: #1e293b; /* Dark Slate Blue */
    --clr-secondary-light: #334155;
    
    --clr-text: #334155;
    --clr-text-light: #64748b;
    --clr-heading: #0f172a;
    
    --clr-bg: #ffffff;
    --clr-bg-alt: #f8fafc;
    
    --clr-white: #ffffff;
    --clr-border: #e2e8f0;
    
    /* Typography */
    --ff-primary: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--ff-primary);
    color: var(--clr-text);
    background-color: var(--clr-bg);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--clr-heading);
    font-weight: 700;
    line-height: 1.2;
}

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

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Utility Classes */
.text-center { text-align: center; }
.bg-light { background-color: var(--clr-bg-alt); }
.section { padding: var(--spacing-xl) 0; }

.section-header { margin-bottom: var(--spacing-lg); }
.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
}
.section-title span { color: var(--clr-primary); }
.subtitle {
    display: inline-block;
    color: var(--clr-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}
.section-desc {
    color: var(--clr-text-light);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
    text-align: center;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-primary {
    background-color: var(--clr-primary);
    color: var(--clr-white);
    box-shadow: var(--shadow-md);
}
.btn-primary:hover {
    background-color: var(--clr-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background-color: transparent;
    color: var(--clr-white);
    border: 2px solid var(--clr-white);
}
.btn-outline:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.btn-whatsapp {
    background-color: #25D366; /* WhatsApp Green */
    color: white;
}
.btn-whatsapp:hover {
    background-color: #1ebe5d;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-block { width: 100%; }

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: transparent;
    transition: all var(--transition-normal);
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 0.75rem 0;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--clr-border);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--clr-white);
}

.header.scrolled .logo { color: var(--clr-secondary); }
.logo i { color: var(--clr-primary); }

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-list {
    display: flex;
    gap: 1.5rem;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
}

.header.scrolled .nav-link { color: var(--clr-text); }

.nav-link:hover, .nav-link.active {
    color: var(--clr-white);
}

.header.scrolled .nav-link:hover, .header.scrolled .nav-link.active {
    color: var(--clr-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--clr-primary);
    transition: width var(--transition-normal);
}

.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--clr-white);
    cursor: pointer;
}
.header.scrolled .mobile-menu-btn { color: var(--clr-secondary); }

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.9)), url('https://images.unsplash.com/photo-1542361345-89e58247f2d5?q=80&w=2070&auto=format&fit=crop') no-repeat center center/cover;
    color: var(--clr-white);
}

.hero-content {
    max-width: 800px;
    z-index: 2;
    position: relative;
    animation: fadeInUp 1s ease forwards;
    opacity: 0;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(4px);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    color: var(--clr-white);
    margin-bottom: 1.5rem;
    leading-trim: both;
    text-edge: cap;
}

.hero-title span { color: var(--clr-primary); }

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    animation: bounce 2s infinite;
}

/* ==========================================================================
   About Section (O que é AVCB)
   ========================================================================== */
.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.image-wrapper { position: relative; }

.image-placeholder {
    width: 100%;
    height: 500px;
    border-radius: 12px;
    background-color: var(--clr-border);
    background-size: cover;
    background-position: center;
    box-shadow: var(--shadow-xl);
}

.bg-building {
    background-image: url('https://images.unsplash.com/photo-1486406146926-c627a92ad1ab?q=80&w=2070&auto=format&fit=crop');
}

.experience-badge {
    position: absolute;
    bottom: -2rem;
    right: -2rem;
    background-color: var(--clr-primary);
    color: var(--clr-white);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.experience-badge .number {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1;
}

.experience-badge .text {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    line-height: 1.2;
}

.benefits-list {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.benefits-list li {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.benefits-list i {
    font-size: 1.5rem;
    color: var(--clr-primary);
    margin-top: 0.25rem;
}

.benefits-list h3 {
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

/* ==========================================================================
   Features Section (Diferenciais)
   ========================================================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--clr-white);
    padding: 2.5rem 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 1px solid var(--clr-border);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.feature-icon {
    width: 70px;
    height: 70px;
    background-color: var(--clr-primary-light);
    color: var(--clr-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin: 0 auto 1.5rem;
    transition: var(--transition-normal);
}

.feature-card:hover .feature-icon {
    background-color: var(--clr-primary);
    color: var(--clr-white);
}

/* ==========================================================================
   Services Section
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--clr-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.service-img {
    height: 200px;
    background-color: var(--clr-border);
    background-size: cover;
    background-position: center;
}
.bg-avcb { background-image: url('https://images.unsplash.com/photo-1541888086425-d81bb19240f5?q=80&w=2070&auto=format&fit=crop'); }
.bg-ppci { background-image: url('https://images.unsplash.com/photo-1503387762-592deb58ef4e?q=80&w=1931&auto=format&fit=crop'); }
.bg-install { background-image: url('https://images.unsplash.com/photo-1504307651254-35680f356dfd?q=80&w=2070&auto=format&fit=crop'); }
.bg-training { background-image: url('https://images.unsplash.com/photo-1574607412702-8618ebccbfeb?q=80&w=2070&auto=format&fit=crop'); }


.service-content {
    padding: 1.5rem;
}

.service-content h3 { margin-bottom: 0.75rem; }
.service-content p {
    color: var(--clr-text-light);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.service-link {
    color: var(--clr-primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}
.service-link:hover { gap: 0.75rem; }

/* ==========================================================================
   CTA Banner
   ========================================================================== */
.cta-banner {
    background-color: var(--clr-secondary);
    color: var(--clr-white);
    padding: 4rem 0;
}

.cta-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.cta-content h2 {
    color: var(--clr-white);
    margin-bottom: 0.5rem;
    font-size: 2rem;
}

.cta-content p { color: rgba(255, 255, 255, 0.8); }

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-details {
    margin-top: 2rem;
    display: grid;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.icon-box {
    width: 50px;
    height: 50px;
    background-color: var(--clr-primary-light);
    color: var(--clr-primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.contact-form-container {
    background: var(--clr-white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
}

.form-group { margin-bottom: 1.5rem; }
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--clr-heading);
}

input, select, textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--clr-border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-fast);
    background-color: var(--clr-bg-alt);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--clr-primary);
    box-shadow: 0 0 0 3px rgba(185, 28, 28, 0.1);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: var(--clr-secondary-light);
    color: var(--clr-white);
    padding: 4rem 0 2rem;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    margin-bottom: 1rem;
    display: inline-flex;
}

.brand-col p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--clr-white);
}

.social-links a:hover {
    background-color: var(--clr-primary);
    transform: translateY(-3px);
}

.footer-col h3 {
    color: var(--clr-white);
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
}

.links-col ul li { margin-bottom: 0.75rem; }
.links-col ul a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}
.links-col ul a:hover {
    color: var(--clr-primary);
    padding-left: 5px;
}

.contact-col p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

.footer-legal {
    display: flex;
    gap: 1.5rem;
}

.footer-legal a:hover { color: var(--clr-white); }

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
    40% { transform: translateY(-10px) translateX(-50%); }
    60% { transform: translateY(-5px) translateX(-50%); }
}

.reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s ease; }
.reveal.active { opacity: 1; transform: translateY(0); }

/* ==========================================================================
   Media Queries (Responsive)
   ========================================================================== */
@media (max-width: 992px) {
    .about-container, .contact-wrapper { grid-template-columns: 1fr; gap: 3rem; }
    .experience-badge { right: 1rem; bottom: -1rem; }
    .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .mobile-menu-btn { display: block; }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background-color: var(--clr-white);
        flex-direction: column;
        justify-content: flex-start;
        padding: 80px 2rem 2rem;
        transition: right 0.3s ease;
        box-shadow: var(--shadow-xl);
    }

    .nav-menu.active { right: 0; }
    
    .nav-list {
        flex-direction: column;
        width: 100%;
        gap: 1.5rem;
        margin-bottom: 2rem;
    }
    
    .nav-link { color: var(--clr-text); font-size: 1.125rem; }
    .nav-link:hover, .nav-link.active { color: var(--clr-primary); }
    
    .header.scrolled { padding: 0.5rem 0; }
    
    .cta-container { flex-direction: column; text-align: center; }
    .footer-top { grid-template-columns: 1fr; gap: 2rem; }
    .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
    
    .section { padding: 4rem 0; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2rem; }
    .hero-buttons { flex-direction: column; width: 100%; }
    .btn { width: 100%; }
    .form-row { grid-template-columns: 1fr; }
}