/* ============================================
   DOUBLE VISION USA LLC - CLEAN STYLESHEET
   Grayscale, Black & White Design System
   ============================================ */

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

:root {
    /* Grayscale Palette */
    --black: #000000;
    --white: #FFFFFF;
    --gray-50: #FAFAFA;
    --gray-100: #F5F5F5;
    --gray-200: #E5E5E5;
    --gray-300: #D4D4D4;
    --gray-400: #A3A3A3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--black);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.double-vision-page {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
}

/* ============================================
   SKIP LINK
   ============================================ */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--black);
    color: var(--white);
    padding: 8px 16px;
    text-decoration: none;
    z-index: 1000;
}

.skip-link:focus {
    top: 0;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.sticky-header {
    position: sticky;
    top: 0;
    background-color: var(--black);
    z-index: 999;
    border-bottom: 1px solid var(--gray-800);
}

.navbar {
    width: 100%;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-left {
    display: flex;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 70px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
    display: block;
    filter: brightness(0) invert(1); /* Make logo white on black header */
}

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

.header-nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: opacity 0.2s ease;
    position: relative;
}

.nav-link:hover {
    opacity: 0.8;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--white);
    transition: width 0.3s ease;
}

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

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--white);
    transition: all 0.3s ease;
}

.mobile-menu-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 998;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    background-color: var(--black);
    z-index: 999;
    padding: 2rem;
    overflow-y: auto;
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 4rem;
}

.mobile-nav-link {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    font-size: 1.125rem;
}

.mobile-nav-link:hover {
    opacity: 0.8;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero-modern {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 1rem;
    background-color: var(--black);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.02) 0%, transparent 50%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 1.5rem;
}

.hero-logo {
    display: block;
    margin-bottom: 3rem;
    text-decoration: none;
}

.hero-logo-img {
    max-height: 100px;
    height: auto;
    width: auto;
    max-width: 280px;
    object-fit: contain;
    filter: brightness(0) invert(1); /* Make logo white on black hero background */
    display: block;
    opacity: 0.95;
}

.hero-title-modern {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: clamp(2rem, 8vw, 5rem);
    font-weight: 600;
    line-height: 1.15;
    color: var(--white);
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
}

.hero-description-modern {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: rgba(255, 255, 255, 0.8);
    max-width: 700px;
    margin: 0 auto 3rem;
    line-height: 1.6;
    font-weight: 400;
    letter-spacing: -0.01em;
}

.hero-cta-modern {
    display: flex;
    justify-content: center;
}

.btn-modern-primary {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    display: inline-block;
    padding: 1.25rem 2.5rem;
    background: var(--white);
    color: var(--black);
    font-weight: 600;
    font-size: 0.9375rem;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-modern-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(255, 255, 255, 0.2);
}

/* ============================================
   CONTAINER
   ============================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ============================================
   SECTION HEADERS
   ============================================ */
.section-header-modern {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title-modern {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: clamp(2rem, 6vw, 4rem);
    font-weight: 700;
    color: var(--black);
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.section-subtitle-modern {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: clamp(0.875rem, 1.5vw, 1rem);
    color: var(--gray-600);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-section-modern {
    padding: 5rem 1rem;
    background: var(--white);
}

.about-content-modern {
    max-width: 1200px;
    margin: 0 auto;
}

.about-description-modern {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    color: var(--black);
    line-height: 1.7;
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 400;
    letter-spacing: -0.01em;
    text-align: center;
}

.value-props-modern {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto 3rem;
}

.value-prop-item {
    text-align: center;
    padding: 2rem;
}

.value-prop-item h4 {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

.value-prop-item p {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 1rem;
    color: var(--gray-600);
    line-height: 1.6;
    font-weight: 400;
}

.solutions-grid-modern {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.solution-card-modern {
    background: var(--gray-100);
    padding: 2rem;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.solution-card-modern:hover {
    background: var(--black);
    border-color: var(--black);
    transform: translateY(-5px);
}

.solution-card-modern h4 {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
    transition: color 0.3s ease;
}

.solution-card-modern:hover h4 {
    color: var(--white);
}

.solution-card-modern p {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 1rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    transition: color 0.3s ease;
}

.solution-card-modern:hover p {
    color: rgba(255, 255, 255, 0.9);
}

.solution-link {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    display: inline-block;
    color: var(--black);
    font-weight: 500;
    font-size: 0.9375rem;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color 0.3s ease;
}

.solution-card-modern:hover .solution-link {
    color: var(--white);
}

/* ============================================
   COMPANIES SECTION
   ============================================ */
.companies-section {
    padding: 5rem 1rem;
    background: var(--white);
    border-top: 1px solid var(--gray-200);
}

.companies-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.company-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.company-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    transition: all 0.4s ease;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.company-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
    border-color: var(--black);
}

.company-logo-wrapper {
    padding: 2.5rem 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    min-height: 180px;
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-50);
}

.company-logo {
    max-width: 280px;
    max-height: 120px;
    width: auto;
    height: auto;
    object-fit: contain;
}

.company-logo-text {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #1e40af 0%, #2563eb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    letter-spacing: -2px;
}

.company-content {
    padding: 2rem 2.5rem 2.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.company-content h3 {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.company-subtitle {
    font-size: 0.9rem;
    color: var(--gray-600);
    font-weight: 600;
    margin-bottom: 1.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.company-description {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--gray-700);
    margin-bottom: 1.5rem;
    flex: 1;
}

.company-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-200);
}

.feature-badge {
    display: inline-block;
    padding: 0.4rem 0.9rem;
    background: var(--gray-100);
    color: var(--black);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    transition: all 0.3s ease;
}

.company-card:hover .feature-badge {
    background: var(--black);
    color: var(--white);
}

.company-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background: var(--gray-50);
    margin-top: auto;
    transition: all 0.3s ease;
    border-top: 1px solid var(--gray-200);
}

.company-card:hover .company-cta {
    background: var(--black);
    border-top-color: var(--gray-800);
}

.cta-text {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--black);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color 0.3s ease;
}

.company-card:hover .cta-text {
    color: var(--white);
}

.cta-arrow {
    font-size: 1.5rem;
    color: var(--black);
    font-weight: 700;
    transition: all 0.3s ease;
    display: inline-block;
}

.company-card:hover .cta-arrow {
    color: var(--white);
    transform: translateX(4px);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-section {
    padding: 4rem 1rem;
    background: var(--white);
    color: var(--black);
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    text-align: center;
}

.company-details h3 {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 1rem;
}

.company-details p {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 1rem;
    color: var(--gray-700);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.business-type {
    font-weight: 600;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
}

.section-title {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: clamp(2rem, 6vw, 4rem);
    font-weight: 700;
    color: var(--black);
    text-align: center;
    margin-bottom: 2rem;
    letter-spacing: -0.03em;
}

/* ============================================
   FOOTER
   ============================================ */
footer {
    background-color: var(--black);
    color: var(--white);
    padding: 4rem 1.5rem 2rem;
    text-align: center;
}

.footer-logo {
    height: 120px;
    width: auto;
    max-width: 300px;
    margin-bottom: 1.5rem;
    filter: brightness(0) invert(1);
    opacity: 0.95;
}

.footer-mission {
    color: var(--gray-400);
    font-size: 0.9375rem;
    margin-bottom: 1rem;
}

footer p {
    color: var(--gray-300);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

footer nav {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
    margin: 2rem 0;
}

footer nav a {
    color: var(--gray-300);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

footer nav a:hover {
    color: var(--white);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (min-width: 768px) {
    .hero-modern {
        padding: 6rem 1rem;
    }
    
    .about-section-modern {
        padding: 8rem 1rem;
    }
    
    .value-props-modern {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 2rem;
    }
    
    .solutions-grid-modern {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 2rem;
    }
    
    .companies-grid {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
        gap: 3rem;
    }
}

@media (max-width: 767px) {
    .header-nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-modern {
        min-height: 85vh;
        padding: 3rem 1rem;
    }
    
    .hero-logo-img {
        max-height: 60px;
        max-width: 180px;
    }
    
    .hero-logo {
        margin-bottom: 2rem;
    }
    
    .hero-title-modern {
        font-size: clamp(1.75rem, 7vw, 2.5rem);
        margin-bottom: 1.25rem;
    }
    
    .hero-description-modern {
        font-size: clamp(1rem, 4vw, 1.25rem);
        margin-bottom: 2.5rem;
    }
    
    .about-section-modern {
        padding: 3rem 1rem;
    }
    
    .section-header-modern {
        margin-bottom: 2.5rem;
    }
    
    .section-title-modern {
        font-size: clamp(1.75rem, 6vw, 2.5rem);
    }
    
    .value-props-modern {
        gap: 1.25rem;
    }
}

/* ============================================
   FREE TOOLS SECTION
   ============================================ */
.tools-section-modern {
    padding: 4rem 0;
}

.tool-card {
    display: block;
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: 12px;
    padding: 2rem;
    text-decoration: none;
    color: var(--black);
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.tool-card:hover {
    border-color: var(--gray-400);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.tool-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-align: center;
}

.tool-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--black);
}

.tool-card p {
    color: var(--gray-600);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.tool-link {
    display: inline-block;
    color: var(--gray-700);
    font-weight: 600;
    font-size: 0.95rem;
}

.tool-card:hover .tool-link {
    color: var(--black);
}

@media (max-width: 768px) {
    .tools-section-modern {
        padding: 3rem 0;
    }
    
    .tool-card {
        padding: 1.5rem;
    }
    
    .tool-card h3 {
        font-size: 1.25rem;
    }
        margin-bottom: 2.5rem;
    }
    
    .value-prop-item {
        padding: 1.5rem;
    }
    
    .value-prop-item h4 {
        font-size: 1.125rem;
    }
    
    .solution-card-modern {
        padding: 1.75rem;
    }
    
    .solution-card-modern h4 {
        font-size: 1.25rem;
    }
    
    .solution-card-modern p {
        font-size: 0.9375rem;
    }
    
    .companies-section {
        padding: 3rem 1rem;
    }
    
    .company-card {
        padding: 0;
    }
    
    .company-logo-wrapper {
        padding: 2rem 1.5rem;
        min-height: 150px;
    }
    
    .company-logo {
        max-width: 220px;
        max-height: 100px;
    }
    
    /* Ace & Alan logo - bigger on mobile */
    .company-card:has(img[alt*="Ace & Alan"]) .company-logo,
    .company-card img[alt*="Ace & Alan"] {
        max-width: 280px;
        max-height: 130px;
    }
    
    .company-content {
        padding: 1.5rem;
    }
    
    .company-content h3 {
        font-size: 1.5rem;
    }
    
    .contact-section {
        padding: 3rem 1rem;
    }
}

/* ============================================
   UTILITIES
   ============================================ */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.8s ease forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}