/* ========================================
   STACK SOLUÇÕES DIGITAIS - STYLESHEET
   Dark Tech / Minimal Corporate Design
   ======================================== */

/* ========== CSS RESET & BASE ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Brand Colors - Official Palette */
    --bg-primary: #0a192f;
    --brand-color: #00acc1;
    --text-primary: #b2aaaa;
    --text-heading: #ffffff;
    --text-secondary: #666666;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-bg-hover: rgba(255, 255, 255, 0.05);
    
    /* Typography */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Roboto', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

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

/* ========== UTILITY CLASSES ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========== HEADER & NAVIGATION ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(10, 25, 47, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.2rem var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-heading);
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
}

.header-logo {
    height: 120px;
    width: auto;
    display: block;
}

.logo-dot {
    color: var(--brand-color);
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--brand-color);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--brand-color);
}

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

.btn-whatsapp {
    padding: 0.7rem 1.5rem;
    border: 2px solid var(--brand-color);
    color: var(--brand-color);
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

.btn-whatsapp:hover {
    background-color: var(--brand-color);
    color: var(--bg-primary);
    box-shadow: 0 0 20px rgba(0, 172, 193, 0.4);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--brand-color);
    border-radius: 2px;
    transition: var(--transition-smooth);
}

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

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.nav-menu.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: rgba(10, 25, 47, 0.98);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-menu.active li {
    text-align: center;
    margin: var(--spacing-sm) 0;
}

.nav-menu.active .nav-link {
    font-size: 1.1rem;
    padding: var(--spacing-sm) var(--spacing-md);
}

/* ========== HERO SECTION ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) 0;
    background: radial-gradient(circle at center, #172a46 0%, #0a192f 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 172, 193, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.hero-content {
    text-align: center;
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    color: var(--text-heading);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    font-weight: 300;
    line-height: 1.8;
}

.btn-primary {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: var(--brand-color);
    color: var(--bg-primary);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 15px rgba(0, 172, 193, 0.3);
    letter-spacing: 0.5px;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 172, 193, 0.5);
    background-color: #00c3d9;
}

/* ========== PROBLEM SOLUTION SECTION ========== */
.problem-solution {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-primary);
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--text-heading);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-primary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    font-weight: 300;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    align-items: stretch;
}

.card {
    background-color: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
    transition: var(--transition-smooth);
    border: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-sizing: border-box;
}

.card:hover {
    background-color: var(--card-bg-hover);
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3), inset 0 0 0 1px var(--brand-color);
}

.card-highlight {
    border: 1px solid rgba(255, 255, 255, 0.05);
    background-color: var(--card-bg);
}

.card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.card-icon-alert {
    background-color: rgba(255, 82, 82, 0.1);
    color: #ff5252;
}

.card-icon-success {
    background-color: rgba(0, 172, 193, 0.15);
    color: var(--brand-color);
}

.card-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: var(--spacing-sm);
}

.card-description {
    color: var(--text-primary);
    font-size: 1rem;
    line-height: 1.7;
    font-weight: 300;
}

/* ========== PORTFOLIO SECTION ========== */
.portfolio {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(180deg, #0a192f 0%, #0d1e35 100%);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.portfolio-item {
    background-color: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition-smooth);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.portfolio-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.4);
}

.portfolio-image-container {
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 2px solid rgba(0, 172, 193, 0.2);
    overflow: hidden;
}

.portfolio-img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: var(--transition-smooth);
    cursor: zoom-in;
}

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

.portfolio-info {
    padding: var(--spacing-md);
}

.portfolio-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: var(--spacing-xs);
}

.portfolio-category {
    color: var(--brand-color);
    font-size: 0.95rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ========== CTA SECTION ========== */
.cta-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-primary);
    text-align: center;
}

.cta-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: var(--spacing-md);
}

.cta-subtitle {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    font-weight: 300;
}

.contact-options {
    margin-bottom: var(--spacing-lg);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem 2.5rem;
    background-color: var(--brand-color);
    color: var(--bg-primary);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 15px rgba(0, 172, 193, 0.3);
    letter-spacing: 0.5px;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 172, 193, 0.5);
    background-color: #00c3d9;
}

.btn-primary svg {
    flex-shrink: 0;
}

.social-contact {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.social-label {
    color: var(--text-primary);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
    font-weight: 300;
}

.social-icons-group {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.social-contact-icon {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem 1.5rem;
    background-color: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-smooth);
    font-size: 0.95rem;
}

.social-contact-icon:hover {
    background-color: var(--card-bg-hover);
    border-color: var(--brand-color);
    color: var(--brand-color);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.social-contact-icon svg {
    flex-shrink: 0;
    stroke: var(--brand-color);
}

.social-contact-icon span {
    font-weight: 500;
}

/* ========== RESPONSIVE - CTA SECTION ========== */
@media (max-width: 768px) {
    .social-icons-group {
        flex-direction: column;
        align-items: center;
    }
    
    .social-contact-icon {
        width: 100%;
        max-width: 320px;
        justify-content: center;
    }
}
/* ========== FOOTER ========== */
.footer {
    background-color: rgba(0, 0, 0, 0.3);
    padding: var(--spacing-md) 0;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-text {
    color: var(--text-primary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 300;
}

.footer-location {
    color: rgba(178, 170, 170, 0.6);
    font-size: 0.85rem;
    font-weight: 300;
}

.footer-privacy {
    margin-top: var(--spacing-xs);
}

.privacy-link {
    color: rgba(178, 170, 170, 0.6);
    font-size: 0.85rem;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.privacy-link:hover {
    color: var(--brand-color);
    text-decoration: underline;
}

.footer-logo {
    height: 90px;
    width: auto;
    display: block;
    margin: 0 auto 20px auto;
    opacity: 0.8;
}

/* ========== LIGHTBOX MODAL ========== */
.lightbox-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lightbox-modal.active {
    display: flex;
    opacity: 1;
}

.lightbox-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 90vw;
    max-height: 90vh;
}

.lightbox-img {
    max-width: 90vw;
    max-height: 80vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.5);
}

.lightbox-title {
    color: #ffffff;
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    margin-top: 1rem;
    text-align: center;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 40px;
    color: #ffffff;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    line-height: 1;
    font-weight: 300;
    transition: var(--transition-smooth);
    z-index: 10000;
}

.lightbox-close:hover {
    color: var(--brand-color);
    transform: scale(1.1);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 50px;
    color: #ffffff;
    background: rgba(0, 0, 0, 0.5);
    border: none;
    padding: 20px 15px;
    cursor: pointer;
    transition: var(--transition-smooth);
    border-radius: 8px;
    font-weight: 300;
    z-index: 10000;
    user-select: none;
    -webkit-user-select: none;
}

.lightbox-nav:hover {
    background: rgba(0, 172, 193, 0.3);
    color: var(--brand-color);
}

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
}

/* Mobile adjustments for navigation buttons */
@media (max-width: 768px) {
    .lightbox-nav {
        font-size: 40px;
        padding: 15px 10px;
    }
    
    .lightbox-prev {
        left: 10px;
    }
    
    .lightbox-next {
        right: 10px;
    }
    
    .lightbox-close {
        top: 15px;
        right: 20px;
        font-size: 35px;
    }
    
    .lightbox-title {
        font-size: 1rem;
        margin-top: 0.8rem;
    }
}

/* ========== COOKIE BANNER ========== */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: rgba(5, 10, 20, 0.95);
    border-top: 2px solid var(--brand-color);
    backdrop-filter: blur(10px);
    z-index: 9999;
    display: none;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
}

.cookie-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
    gap: var(--spacing-md);
}

.cookie-text {
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 300;
    line-height: 1.5;
    flex: 1;
}

.cookie-link {
    color: var(--brand-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-smooth);
}

.cookie-link:hover {
    text-decoration: underline;
}

.cookie-btn {
    background-color: var(--brand-color);
    color: var(--bg-primary);
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    white-space: nowrap;
    box-shadow: 0 2px 10px rgba(0, 172, 193, 0.3);
}

.cookie-btn:hover {
    background-color: #00c3d9;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 172, 193, 0.5);
}

/* ========== RESPONSIVE - COOKIE BANNER ========== */
@media (max-width: 768px) {
    .cookie-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
        padding: 1rem var(--spacing-sm);
    }
    
    .cookie-text {
        font-size: 0.85rem;
    }
    
    .cookie-btn {
        width: 100%;
        max-width: 200px;
    }
}

/* ========== RESPONSIVE DESIGN ========== */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero {
        padding: var(--spacing-lg) 0;
        min-height: 90vh;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .btn-primary {
        padding: 0.9rem 2rem;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .nav-container {
        padding: 1rem var(--spacing-sm);
    }
    
    .logo {
        font-size: 1.5rem;
    }
    
    .card {
        padding: var(--spacing-md);
    }
    
    .portfolio-placeholder {
        height: 220px;
    }
}

/* ========== PRIVACY POLICY PAGE ========== */
.privacy-policy {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-primary);
    min-height: 100vh;
}

.policy-content {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.policy-title {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    letter-spacing: -0.5px;
}

.policy-section {
    margin-bottom: var(--spacing-lg);
}

.policy-section h2 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--brand-color);
    margin-bottom: var(--spacing-sm);
}

.policy-section p {
    color: var(--text-primary);
    font-size: 1rem;
    line-height: 1.7;
    font-weight: 300;
    margin-bottom: var(--spacing-sm);
}

.policy-section ul {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.policy-section li {
    color: var(--text-primary);
    font-size: 1rem;
    line-height: 1.7;
    font-weight: 300;
    margin-bottom: var(--spacing-xs);
}

.policy-section a {
    color: var(--brand-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-smooth);
}

.policy-section a:hover {
    text-decoration: underline;
}

/* ========== RESPONSIVE - PRIVACY POLICY ========== */
@media (max-width: 768px) {
    .policy-content {
        padding: var(--spacing-md);
    }
    
    .policy-title {
        font-size: 1.8rem;
    }
    
    .policy-section h2 {
        font-size: 1.2rem;
    }
}