:root {
    --bg-color: #ffffff;
    --text-color: #1d1d1f;
    --text-muted: #86868b;
    --accent: #0066cc;
    --nav-bg: rgba(255, 255, 255, 0.8);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.2rem 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.logo {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 2px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 400;
    transition: color 0.3s ease;
}

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

/* Common Section Styles */
section {
    padding: 8rem 4rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

h2 {
    font-size: 4rem;
    font-weight: 600;
    letter-spacing: -1.5px;
    margin-bottom: 1rem;
}

p {
    font-size: 1.5rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 3rem auto;
}

/* Hero Section */
.hero-section {
    padding-top: 12rem;
}

.hero-content h1 {
    font-size: 5.5rem;
    font-weight: 600;
    letter-spacing: -2px;
    background: linear-gradient(180deg, #1d1d1f 0%, #86868b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
}

.hero-image-container {
    width: 100%;
    max-width: 1200px;
    margin-top: 4rem;
    display: flex;
    justify-content: center;
}

.hero-image {
    width: 100%;
    max-width: 1200px;
    height: auto;
    object-fit: contain;
    display: block;
    margin: 0 auto;
}

/* Feature Section */
.feature-gallery {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.gallery-img {
    width: 100%;
    max-width: 1000px;
    object-fit: contain;
    display: block;
    margin: 0 auto 4rem auto;
    transition: transform 0.8s ease;
}

.gallery-img:hover {
    transform: scale(1.03);
    z-index: 10;
    position: relative;
}

/* Color Section */
.color-grid {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
    width: 100%;
    max-width: 1200px;
}

.color-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.color-item img {
    width: 100%;
    max-width: 1200px;
    height: auto;
    object-fit: contain;
    display: block;
    margin: 0 auto;
}

/* Concept Section */
.concept-images {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.concept-img {
    width: 100%;
    max-width: 1200px;
    height: auto;
    object-fit: contain;
    display: block;
    margin: 0 auto 4rem auto;
}

.concept-side {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

/* Footer */
footer {
    padding: 3rem;
    text-align: center;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transition: opacity 1s cubic-bezier(0.5, 0, 0, 1);
}

.fade-in.visible {
    opacity: 1;
}

.slide-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s cubic-bezier(0.5, 0, 0, 1), transform 1s cubic-bezier(0.5, 0, 0, 1);
}

.slide-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 1s cubic-bezier(0.5, 0, 0, 1), transform 1s cubic-bezier(0.5, 0, 0, 1);
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 1s cubic-bezier(0.5, 0, 0, 1), transform 1s cubic-bezier(0.5, 0, 0, 1);
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }
.delay-3 { transition-delay: 0.6s; }

/* Responsive Design */
@media (max-width: 768px) {
    .navbar { padding: 1rem 2rem; }
    .nav-links { display: none; }
    section { padding: 6rem 2rem; }
    h2 { font-size: 2.5rem; }
    .hero-content h1 { font-size: 3.5rem; }
    .concept-images { flex-direction: column; }
}