/* ================================
   GOSMART - Modern Professional Design
   Inspired by bold tech aesthetics
   ================================ */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');

/* CSS Variables */
:root {
    --primary: #0a0a0a;
    --secondary: #141414;
    --accent: #ff6b35;
    --accent-light: #ff8c5a;
    --accent-dark: #e55a2b;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --gradient-1: linear-gradient(135deg, #ff6b35 0%, #f7c531 100%);
    --gradient-2: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-dark: linear-gradient(180deg, #0a0a0a 0%, #1a1a2e 100%);
    --glass: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow-glow: 0 0 60px rgba(255, 107, 53, 0.3);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --radius: 16px;
    --radius-sm: 8px;
}

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

html {
    scroll-behavior: smooth;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 8vw, 5rem); }
h2 { font-size: clamp(2rem, 5vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ================================
   Navigation
   ================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 15px 0;
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: -0.03em;
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.nav-links {
    display: flex;
    gap: 40px;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
}

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

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

.lang-switch {
    display: flex;
    gap: 8px;
    padding: 4px;
    background: var(--glass);
    border-radius: 30px;
    border: 1px solid var(--glass-border);
}

.lang-btn {
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.85rem;
    transition: var(--transition);
}

.lang-btn.active {
    background: var(--accent);
    color: white;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.mobile-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* ================================
   Hero Section
   ================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(ellipse, rgba(255, 107, 53, 0.15) 0%, transparent 60%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(to top, var(--primary), transparent);
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 24px;
    font-weight: 500;
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero h1 {
    margin-bottom: 24px;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

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

.hero-image {
    width: 100%;
    max-width: 550px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-glow);
    transition: var(--transition);
}

.hero-image:hover {
    transform: scale(1.02);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: 0 4px 20px rgba(255, 107, 53, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255, 107, 53, 0.5);
}

.btn-secondary {
    background: var(--glass);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent);
}

.btn-icon {
    width: 20px;
    height: 20px;
}

/* ================================
   Section Styles
   ================================ */
section {
    padding: 120px 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 80px;
}

.section-tag {
    display: inline-block;
    padding: 8px 20px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 20px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.15rem;
    margin-top: 20px;
}

/* ================================
   Video Section
   ================================ */
.video-section {
    background: var(--secondary);
}

.video-container {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-glow);
    max-width: 1000px;
    margin: 0 auto;
}

.video-container video {
    width: 100%;
    display: block;
    border-radius: var(--radius);
}

.video-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    cursor: pointer;
}

.video-container:hover .video-overlay {
    opacity: 1;
}

.play-btn {
    width: 80px;
    height: 80px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.play-btn:hover {
    transform: scale(1.1);
}

.play-btn svg {
    width: 30px;
    height: 30px;
    fill: white;
    margin-left: 4px;
}

/* ================================
   Features/Benefits
   ================================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    padding: 40px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 1.5rem;
}

.feature-card h3 {
    margin-bottom: 12px;
    font-size: 1.3rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ================================
   Gallery/Products
   ================================ */
.gallery-section {
    background: var(--gradient-dark);
}

.gallery-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 28px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn.active,
.tab-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
}

.gallery-item {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 4/3;
    cursor: pointer;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.gallery-item-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    opacity: 0;
    transition: var(--transition);
    display: flex;
    align-items: flex-end;
    padding: 24px;
}

.gallery-item:hover .gallery-item-overlay {
    opacity: 1;
}

.gallery-item-title {
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
}

/* ================================
   Use Cases / Situations
   ================================ */
.usecases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.usecase-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    padding: 40px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
}

.usecase-card:nth-child(even) {
    direction: rtl;
}

.usecase-card:nth-child(even) > * {
    direction: ltr;
}

.usecase-image {
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.usecase-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: var(--transition);
}

.usecase-card:hover .usecase-image img {
    transform: scale(1.03);
}

.usecase-content h3 {
    margin-bottom: 16px;
}

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

/* ================================
   About/Inventor Section
   ================================ */
.about-section {
    background: var(--secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 80px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    border-radius: var(--radius);
    box-shadow: var(--shadow-glow);
}

.about-image::before {
    content: '';
    position: absolute;
    inset: -20px;
    border: 2px solid var(--accent);
    border-radius: calc(var(--radius) + 20px);
    opacity: 0.3;
}

.about-content h2 {
    margin-bottom: 24px;
}

.about-content .lead {
    font-size: 1.3rem;
    color: var(--accent);
    margin-bottom: 24px;
    font-weight: 500;
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1.05rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid var(--glass-border);
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
    display: block;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 4px;
}

/* ================================
   Specs/Tech Section
   ================================ */
.specs-section {
    background: var(--primary);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.spec-card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    transition: var(--transition);
}

.spec-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
}

.spec-card h3 {
    color: var(--accent);
    margin-bottom: 20px;
    font-size: 1.4rem;
}

.spec-list {
    list-style: none;
}

.spec-list li {
    padding: 12px 0;
    border-bottom: 1px solid var(--glass-border);
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
}

.spec-list li:last-child {
    border-bottom: none;
}

.spec-list .label {
    color: var(--text-muted);
}

.spec-list .value {
    color: var(--text-primary);
    font-weight: 500;
}

/* ================================
   Contact Section
   ================================ */
.contact-section {
    background: var(--gradient-dark);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

.contact-info h2 {
    margin-bottom: 24px;
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: 40px;
    font-size: 1.1rem;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.contact-link:hover {
    color: var(--accent);
}

.contact-link-icon {
    width: 50px;
    height: 50px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.contact-form {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 50px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px 20px;
    background: var(--primary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

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

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.form-message {
    margin-top: 20px;
    padding: 16px;
    border-radius: var(--radius-sm);
    display: none;
}

.form-message.success {
    background: rgba(76, 175, 80, 0.2);
    border: 1px solid rgba(76, 175, 80, 0.5);
    color: #81c784;
    display: block;
}

.form-message.error {
    background: rgba(244, 67, 54, 0.2);
    border: 1px solid rgba(244, 67, 54, 0.5);
    color: #e57373;
    display: block;
}

/* ================================
   Footer
   ================================ */
.footer {
    background: var(--secondary);
    padding: 80px 0 30px;
    border-top: 1px solid var(--glass-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand p {
    color: var(--text-secondary);
    max-width: 300px;
}

.footer-col h4 {
    margin-bottom: 20px;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

/* ================================
   Lightbox Modal
   ================================ */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    max-width: 90%;
    max-height: 90vh;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 90vh;
    border-radius: var(--radius-sm);
}

.lightbox-close {
    position: absolute;
    top: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.lightbox-close:hover {
    background: var(--accent);
}

/* ================================
   Responsive Design
   ================================ */
@media (max-width: 1200px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-description {
        max-width: 100%;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .about-image {
        max-width: 400px;
        margin: 0 auto;
    }
}

@media (max-width: 992px) {
    .nav-links {
        display: none;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .specs-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .usecases-grid {
        grid-template-columns: 1fr;
    }
    
    .usecase-card {
        grid-template-columns: 1fr;
    }
    
    .usecase-card:nth-child(even) {
        direction: ltr;
    }
}

@media (max-width: 768px) {
    section {
        padding: 80px 0;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* Mobile Navigation */
.mobile-nav {
    position: fixed;
    inset: 0;
    background: var(--primary);
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 30px;
    transform: translateX(100%);
    transition: var(--transition);
}

.mobile-nav.active {
    transform: translateX(0);
}

.mobile-nav a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 600;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* Patent Button Special */
.btn-patent {
    background: var(--gradient-2);
    color: white;
}

.btn-patent:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.5);
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    animation: bounce 2s infinite;
}

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

.scroll-indicator .mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-secondary);
    border-radius: 12px;
    position: relative;
}

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

@keyframes scroll {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(15px); }
}