/* ========================================
   LedTech - Stylesheet
   ======================================== */

/* CSS Variables */
:root {
    /* Colors */
    --color-primary: #0A2540;
    --color-secondary: #00D4AA;
    --color-accent: #635BFF;
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #A3B3C2;
    --color-background: #F6F9FC;
    --color-surface: #FFFFFF;
    --color-border: #E3E8EE;
    --color-text-dark: #0A2540;
    
    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #0A2540 0%, #1A3A5C 100%);
    --gradient-accent: linear-gradient(135deg, #00D4AA 0%, #635BFF 100%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 32px;
    --space-xl: 48px;
    --space-2xl: 64px;
    --space-3xl: 96px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(10, 37, 64, 0.04);
    --shadow-md: 0 4px 24px rgba(10, 37, 64, 0.08);
    --shadow-lg: 0 8px 32px rgba(10, 37, 64, 0.12);
    
    /* Transitions */
    --transition-fast: 200ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 600ms ease-out;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text-dark);
    background: var(--color-background);
    -webkit-font-smoothing: antialiased;
}

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

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

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* ========================================
   Header
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 37, 64, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text-primary);
}

.logo-accent {
    color: var(--color-secondary);
}

.nav {
    display: flex;
    gap: var(--space-xl);
}

.nav a {
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 15px;
    transition: color var(--transition-fast);
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.lang-switch {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--color-text-primary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    font-size: 13px;
    transition: all var(--transition-fast);
}

.lang-switch:hover {
    border-color: var(--color-secondary);
    color: var(--color-secondary);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-fast);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

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

.btn-primary:hover {
    background: #00C49A;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 212, 170, 0.3);
}

/* ========================================
   Section Commons
   ======================================== */
section {
    padding: var(--space-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-secondary);
    margin-bottom: var(--space-sm);
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    color: var(--color-text-dark);
    line-height: 1.2;
}

/* ========================================
   Services Section
   ======================================== */
.services {
    background: var(--color-background);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.service-card {
    background: var(--color-surface);
    padding: var(--space-xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
    border: 1px solid var(--color-border);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.service-card.featured {
    border: 2px solid var(--color-secondary);
    position: relative;
}

.service-card.featured::before {
    content: 'Mais Popular';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-secondary);
    color: var(--color-primary);
    font-size: 11px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 12px;
    text-transform: uppercase;
}

.service-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-accent);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-bottom: var(--space-md);
}

.service-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text-dark);
    margin-bottom: var(--space-sm);
}

.service-card p {
    color: var(--color-text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

/* ========================================
   About Section
   ======================================== */
.about {
    background: var(--color-surface);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.about-content .section-tag,
.about-content .section-title {
    text-align: left;
}

.about-content .section-title {
    margin-bottom: var(--space-lg);
}

.about-content p {
    color: var(--color-text-secondary);
    font-size: 16px;
    margin-bottom: var(--space-md);
    line-height: 1.7;
}

.stats {
    display: flex;
    gap: var(--space-xl);
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-secondary);
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-graphic {
    width: 100%;
    max-width: 400px;
    height: 400px;
    background: var(--gradient-accent);
    border-radius: var(--radius-lg);
    opacity: 0.8;
    position: relative;
    overflow: hidden;
}

.about-graphic::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 10px,
        rgba(255, 255, 255, 0.05) 10px,
        rgba(255, 255, 255, 0.05) 20px
    );
    animation: slide 20s linear infinite;
}

@keyframes slide {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    background: var(--color-primary);
}

.contact .section-tag {
    color: var(--color-secondary);
}

.contact .section-title {
    color: var(--color-text-primary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.contact-info p {
    color: var(--color-text-secondary);
    font-size: 16px;
    margin: var(--space-md) 0 var(--space-xl);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.contact-item:hover {
    color: var(--color-secondary);
}

.contact-item svg {
    color: var(--color-secondary);
}

.contact-form {
    background: var(--color-surface);
    padding: var(--space-xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-xl);
    }

    .hero-title {
        font-size: 48px;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-visual {
        display: none;
    }

    .services-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }

    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .about-visual {
        order: -1;
    }

    .about-graphic {
        height: 250px;
    }

    .stats {
        justify-content: center;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xl);
    }

    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--color-primary);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .menu-toggle {
        display: flex;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .section-title {
        font-size: 32px;
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
    }

    .stats {
        flex-direction: column;
        gap: var(--space-lg);
        text-align: center;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand p {
        max-width: none;
    }
}

/* ========================================
   Animations
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* ========================================
   Utility Classes
   ======================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-dark);
    margin-bottom: var(--space-xs);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-size: 15px;
    transition: border-color var(--transition-fast);
    background: var(--color-surface);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-secondary);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-status {
    margin-top: var(--space-md);
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 14px;
    display: none;
}

.form-status.success {
    display: block;
    background: rgba(0, 212, 170, 0.1);
    color: #00A884;
    border: 1px solid rgba(0, 212, 170, 0.3);
}

.form-status.error {
    display: block;
    background: rgba(255, 71, 87, 0.1);
    color: #FF4757;
    border: 1px solid rgba(255, 71, 87, 0.3);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: #071B2E;
    padding: var(--space-3xl) 0 var(--space-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

.footer-brand .logo-text {
    font-size: 28px;
    display: block;
    margin-bottom: var(--space-md);
}

.footer-brand p {
    color: var(--color-text-secondary);
    font-size: 15px;
    line-height: 1.6;
    max-width: 300px;
}

.footer-links h4,
.footer-legal h4 {
    color: var(--color-text-primary);
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-md);
}

.footer-links a,
.footer-legal a {
    display: block;
    color: var(--color-text-secondary);
    font-size: 15px;
    margin-bottom: var(--space-sm);
    transition: color var(--transition-fast);
}

.footer-links a:hover,
.footer-legal a:hover {
    color: var(--color-secondary);
}

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-secondary);
    font-size: 14px;
}

.btn-outline {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-full {
    width: 100%;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    background: var(--gradient-hero);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 72px;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-text-primary);
    margin-bottom: var(--space-lg);
}

.hero-subtitle {
    font-size: 20px;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 540px;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-graphic {
    position: relative;
    width: 400px;
    height: 400px;
}

.graphic-element {
    position: absolute;
    border-radius: 50%;
    opacity: 0.6;
}

.graphic-element:nth-child(1) {
    width: 300px;
    height: 300px;
    background: var(--gradient-accent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    filter: blur(60px);
}

.graphic-element:nth-child(2) {
    width: 200px;
    height: 200px;
    background: var(--color-secondary);
    top: 30%;
    left: 20%;
    filter: blur(40px);
    animation: float 6s ease-in-out infinite;
}

.graphic-element:nth-child(3) {
    width: 150px;
    height: 150px;
    background: var(--color-accent);
    bottom: 20%;
    right: 20%;
    filter: blur(30px);
    animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.hero-scroll {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator {
    display: block;
    width: 24px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    position: relative;
}

.scroll-indicator::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--color-secondary);
    border-radius: 2px;
    animation: scroll 2s ease-in-out infinite;
}

@keyframes scroll {
    0%, 100% { opacity: 1; top: 8px; }
    50% { opacity: 0.3; top: 20px; }
}