/* ============================================
   AddIn3D - Modern Premium Design System
   VARIANCE: 7 | MOTION: 6 | DENSITY: 3
   ============================================ */

:root {
    /* Color Palette - OKLCH for perceptual uniformity */
    --ink: #0a0a0a;
    --ink-soft: #1a1a1a;
    --ink-lighter: #2a2a2a;
    --surface: #f5f5f5;
    --surface-warm: #fafaf7;
    --accent: #2563eb;
    --accent-dark: #1e40af;
    --accent-light: #3b82f6;
    --success: #059669;
    --warning: #d97706;
    --error: #dc2626;
    --muted: #6b7280;
    
    /* Spacing Scale */
    --sp-xs: 0.5rem;
    --sp-sm: 0.75rem;
    --sp-md: 1rem;
    --sp-lg: 1.5rem;
    --sp-xl: 2rem;
    --sp-2xl: 3rem;
    --sp-3xl: 4rem;
    --sp-4xl: 6rem;
    
    /* Typography */
    --font-display: 'Sora', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'Fira Code', monospace;
    
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    
    /* Line Heights */
    --lh-tight: 1.2;
    --lh-snug: 1.375;
    --lh-normal: 1.5;
    --lh-relaxed: 1.625;
    
    /* Transitions */
    --duration-fast: 150ms;
    --duration-base: 300ms;
    --duration-slow: 500ms;
    --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
    --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root {
        --ink: #fafafa;
        --ink-soft: #f0f0f0;
        --ink-lighter: #e5e5e5;
        --surface: #0a0a0a;
        --surface-warm: #121212;
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--ink);
    background-color: var(--surface);
    line-height: var(--lh-normal);
    font-size: var(--text-base);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: var(--lh-tight);
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--duration-base) var(--ease-out);
}

a:hover {
    color: var(--accent-dark);
}

/* ============================================
   Navigation
   ============================================ */

.navbar {
    position: sticky;
    top: 0;
    z-index: 40;
    background: rgba(var(--rgb-surface), 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all var(--duration-base) var(--ease-out);
}

@supports not (backdrop-filter: blur()) {
    .navbar {
        background: var(--surface);
    }
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--sp-lg) var(--sp-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    flex: 0 0 auto;
}

.nav-logo {
    height: 44px;
    width: auto;
    display: block;
}

.logo-text {
    font-size: var(--text-2xl);
    font-weight: 700;
    letter-spacing: -0.02em;
    font-family: var(--font-display);
}

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

.nav-links {
    display: flex;
    gap: var(--sp-xl);
    align-items: center;
    flex: 1;
    justify-content: flex-end;
}

.nav-link {
    color: var(--muted);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: color var(--duration-base) var(--ease-out);
}

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

.nav-cta {
    background: var(--accent);
    color: white;
    padding: var(--sp-sm) var(--sp-lg);
    border-radius: 0.375rem;
    font-size: var(--text-sm);
    font-weight: 600;
    transition: all var(--duration-base) var(--ease-out);
}

.nav-cta:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 0.375rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--sp-md);
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--ink);
    transition: all var(--duration-base) var(--ease-out);
    border-radius: 1px;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--sp-4xl) var(--sp-xl);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-4xl);
    align-items: center;
}

.hero-text {
    z-index: 2;
}

.hero-title {
    font-size: var(--text-5xl);
    line-height: var(--lh-tight);
    margin-bottom: var(--sp-xl);
    letter-spacing: -0.03em;
    animation: slideUpFade 0.8s var(--ease-out) 0.1s both;
}

.hero-subtitle {
    font-size: var(--text-xl);
    color: var(--muted);
    margin-bottom: var(--sp-2xl);
    line-height: var(--lh-relaxed);
    max-width: 90%;
    animation: slideUpFade 0.8s var(--ease-out) 0.2s both;
}

.hero-cta {
    display: flex;
    gap: var(--sp-lg);
    flex-wrap: wrap;
    animation: slideUpFade 0.8s var(--ease-out) 0.3s both;
}

.btn {
    padding: var(--sp-md) var(--sp-xl);
    border-radius: 0.375rem;
    font-weight: 600;
    font-size: var(--text-sm);
    transition: all var(--duration-base) var(--ease-out);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 2px solid transparent;
    cursor: pointer;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
}

.btn-secondary:hover {
    background: var(--accent);
    color: white;
    transform: translateY(-2px);
}

.btn-large {
    padding: var(--sp-lg) var(--sp-2xl);
    font-size: var(--text-lg);
}

.hero-visual {
    position: relative;
    height: 500px;
    border-radius: 1.5rem;
    overflow: hidden;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 1.5rem;
    box-shadow: 0 32px 64px rgba(0, 0, 0, 0.2);
    animation: slideUpFade 0.8s var(--ease-out) 0.4s both;
}

.hero-scroll {
    position: absolute;
    bottom: var(--sp-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--sp-md);
    color: var(--muted);
    font-size: var(--text-sm);
    animation: pulse 2s ease-in-out infinite;
}

.scroll-indicator {
    width: 24px;
    height: 36px;
    border: 2px solid var(--muted);
    border-radius: 12px;
    position: relative;
}

.scroll-indicator::after {
    content: '';
    position: absolute;
    width: 4px;
    height: 8px;
    background: var(--muted);
    border-radius: 2px;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollDot 1.5s ease-in-out infinite;
}

/* ============================================
   Features Section
   ============================================ */

.features {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--sp-4xl) var(--sp-xl);
}

.section-header {
    text-align: center;
    margin-bottom: var(--sp-4xl);
    animation: slideUpFade 0.8s var(--ease-out);
}

.section-header h2 {
    font-size: var(--text-4xl);
    margin-bottom: var(--sp-md);
    letter-spacing: -0.02em;
}

.section-header p {
    font-size: var(--text-lg);
    color: var(--muted);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--sp-2xl);
}

.feature-card {
    padding: var(--sp-2xl);
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 1rem;
    transition: all var(--duration-base) var(--ease-out);
    animation: slideUpFade 0.8s var(--ease-out);
}

.feature-card:hover {
    border-color: var(--accent);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
    transform: translateY(-4px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: rgba(37, 99, 235, 0.1);
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    margin-bottom: var(--sp-lg);
    transition: all var(--duration-base) var(--ease-out);
}

.feature-card:hover .feature-icon {
    background: var(--accent);
    color: white;
    transform: scale(1.1);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-card h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--sp-md);
}

.feature-card p {
    color: var(--muted);
    line-height: var(--lh-relaxed);
    font-size: var(--text-sm);
}

/* ============================================
   Stats Section
   ============================================ */

.stats {
    max-width: 1280px;
    margin: var(--sp-4xl) auto 0;
    padding: var(--sp-4xl) var(--sp-xl);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--sp-2xl);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--accent);
    margin-bottom: var(--sp-md);
    font-family: var(--font-display);
}

.stat-label {
    display: block;
    font-size: var(--text-sm);
    color: var(--muted);
    font-weight: 500;
}

/* ============================================
   Shop CTA Section
   ============================================ */

.shop-cta {
    max-width: 1280px;
    margin: var(--sp-4xl) auto;
    padding: var(--sp-4xl) var(--sp-xl);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(37, 99, 235, 0.02) 100%);
    border: 1px solid rgba(37, 99, 235, 0.1);
    border-radius: 1.5rem;
    text-align: center;
}

.shop-content h2 {
    font-size: var(--text-4xl);
    margin-bottom: var(--sp-md);
}

.shop-content p {
    font-size: var(--text-lg);
    color: var(--muted);
    margin-bottom: var(--sp-2xl);
}

/* ============================================
   Contact Section
   ============================================ */

.contact {
    max-width: 1280px;
    margin: var(--sp-4xl) auto;
    padding: var(--sp-4xl) var(--sp-xl);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-4xl);
}

.contact-info h3 {
    font-size: var(--text-2xl);
    margin-bottom: var(--sp-lg);
}

.contact-info p {
    color: var(--muted);
    margin-bottom: var(--sp-2xl);
    line-height: var(--lh-relaxed);
}

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

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-md);
    padding: var(--sp-lg) var(--sp-xl);
    background: linear-gradient(135deg, #25d366 0%, #128c7e 100%);
    color: white;
    border-radius: 0.75rem;
    font-weight: 600;
    transition: all var(--duration-base) var(--ease-out);
    text-align: center;
}

.contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(37, 211, 102, 0.3);
}

.contact-btn svg {
    width: 24px;
    height: 24px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--sp-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--sp-sm);
}

.form-group label {
    font-weight: 600;
    font-size: var(--text-sm);
}

.form-group input,
.form-group textarea {
    padding: var(--sp-md);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 0.375rem;
    font-family: var(--font-body);
    font-size: var(--text-base);
    transition: all var(--duration-base) var(--ease-out);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

/* ============================================
   Showcase Section
   ============================================ */

.showcase {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--sp-4xl) var(--sp-xl);
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-lg);
}

.showcase-item {
    position: relative;
    border-radius: 1rem;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: var(--ink-lighter);
}

.showcase-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slow) var(--ease-out);
    display: block;
}

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

.showcase-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--sp-lg) var(--sp-xl);
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.75));
    color: white;
    font-weight: 600;
    font-size: var(--text-sm);
    letter-spacing: 0.02em;
    transform: translateY(100%);
    transition: transform var(--duration-base) var(--ease-out);
}

.showcase-item:hover .showcase-overlay {
    transform: translateY(0);
}

/* ============================================
   Legal Pages
   ============================================ */

.legal-header {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--sp-4xl) var(--sp-xl) var(--sp-2xl);
    text-align: center;
}

.legal-header h1 {
    font-size: var(--text-4xl);
    margin-bottom: var(--sp-md);
}

.legal-header p {
    color: var(--muted);
    font-size: var(--text-sm);
}

.legal-content {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--sp-2xl) var(--sp-xl) var(--sp-4xl);
}

.legal-container h2 {
    font-size: var(--text-2xl);
    margin-top: var(--sp-3xl);
    margin-bottom: var(--sp-lg);
    color: var(--ink);
}

.legal-container h3 {
    font-size: var(--text-lg);
    margin-top: var(--sp-2xl);
    margin-bottom: var(--sp-md);
    color: var(--ink-lighter);
}

.legal-container p {
    margin-bottom: var(--sp-md);
    line-height: var(--lh-relaxed);
    color: var(--muted);
}

.legal-container ul,
.legal-container ol {
    margin: var(--sp-lg) 0 var(--sp-lg) var(--sp-2xl);
    line-height: var(--lh-relaxed);
}

.legal-container li {
    margin-bottom: var(--sp-md);
    color: var(--muted);
}

.terms-acknowledgment {
    margin-top: var(--sp-3xl);
    padding: var(--sp-2xl);
    background: rgba(37, 99, 235, 0.05);
    border-left: 4px solid var(--accent);
    border-radius: 0.375rem;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    margin-top: var(--sp-4xl);
    background: var(--ink);
    color: #f0f0f0;
    padding: var(--sp-4xl) var(--sp-xl) var(--sp-2xl);
}

.footer-content {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--sp-2xl);
    margin-bottom: var(--sp-2xl);
}

.footer-section h4 {
    font-size: var(--text-lg);
    margin-bottom: var(--sp-lg);
    color: white;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--text-sm);
    line-height: var(--lh-relaxed);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--sp-md);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--duration-base) var(--ease-out);
}

.footer-section a:hover {
    color: white;
}

.footer-payments {
    max-width: 1280px;
    margin: 0 auto var(--sp-xl);
    display: flex;
    align-items: center;
    gap: var(--sp-lg);
    flex-wrap: wrap;
}

.footer-payments > span {
    color: rgba(255, 255, 255, 0.4);
    font-size: var(--text-sm);
    white-space: nowrap;
}

.payment-icons {
    display: flex;
    align-items: center;
    gap: var(--sp-md);
    flex-wrap: wrap;
}

.payment-icons img {
    height: 24px;
    width: auto;
    filter: brightness(0) invert(1);
    opacity: 0.5;
    transition: opacity var(--duration-base) var(--ease-out);
}

.payment-icons img:hover {
    opacity: 1;
}

.footer-bottom {
    max-width: 1280px;
    margin: 0 auto;
    padding-top: var(--sp-2xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.4);
    font-size: var(--text-sm);
}

/* ============================================
   Animations
   ============================================ */

@keyframes slideUpFade {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-30px);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes scrollDot {
    0% {
        opacity: 0;
        transform: translateX(-50%) translateY(0);
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(8px);
    }
}

/* ============================================
   Reduced Motion
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding: var(--sp-2xl) var(--sp-lg);
    }

    .hero-content {
        grid-template-columns: 1fr;
    }

    .hero-title {
        font-size: var(--text-3xl);
    }

    .hero-subtitle {
        font-size: var(--text-lg);
    }

    .hero-visual {
        display: none;
    }

    .showcase-grid {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .stats {
        grid-template-columns: repeat(2, 1fr);
    }

    @media (max-width: 480px) {
        .stats {
            grid-template-columns: 1fr;
        }

        .hero-title {
            font-size: var(--text-2xl);
        }

        .section-header h2 {
            font-size: var(--text-2xl);
        }

        .nav-container {
            padding: var(--sp-md) var(--sp-lg);
        }

        .logo-text {
            font-size: var(--text-lg);
        }
    }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
    .navbar,
    .hero-scroll,
    .contact-btn {
        display: none;
    }

    body {
        background: white;
        color: black;
    }
}