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

:root {
    --bg-color: #ffffff; 
    --text-main: #1d1d1f; 
    --text-secondary: #86868b; 
    --border-light: rgba(0, 0, 0, 0.08); 
    --nav-bg: rgba(255, 255, 255, 0.8); 
    --viewer-bg: #f5f5f7; 
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    line-height: 1.47059;
    letter-spacing: -0.022em;
    -webkit-font-smoothing: antialiased;
}

.global-nav {
    position: fixed; 
    top: 0;
    width: 100%;
    height: 48px;
    background-color: var(--nav-bg);
    backdrop-filter: blur(12px); 
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-size: 12px;
    font-weight: 400;
    opacity: 0.8;
    transition: opacity 0.2s ease;
}

.nav-links a:hover { opacity: 1; }

.container {
    max-width: 980px; 
    margin: 0 auto;
    padding: 0 2rem;
}

header {
    min-height: 55vh; 
    display: flex;
    flex-direction: column;
    justify-content: center; 
    align-items: center;
    padding-top: 48px; 
}

.logo-wrapper {
    display: flex;
    align-items: flex-end; 
    gap: 1.5rem; 
    text-transform: uppercase;
}

.logo-main {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: clamp(3rem, 10vw, 6.5rem); 
    color: var(--text-main);
    line-height: 0.85; 
    letter-spacing: -0.05em;
}

.logo-stacked {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-align: left;
    opacity: 0.9;
    height: clamp(2.6rem, 8.5vw, 5.5rem);
}

.logo-stacked span {
    font-size: clamp(8px, 1.2vw, 13px);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 16px; 
    font-weight: 400; 
    color: var(--text-secondary); 
    margin-top: 3rem; 
    text-align: center;
    letter-spacing: 0.02em; 
}

section {
    padding: 100px 0;
    border-top: 1px solid var(--border-light);
    scroll-margin-top: 48px; 
}

.section-header {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    text-align: center;
}

.hardware-showcase {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
}

@media (min-width: 768px) {
    .hardware-showcase { grid-template-columns: 1fr 1fr; }
}

.hardware-block h3 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 1rem;
}

.hardware-block p {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    min-height: 75px; 
}

.viewer-container {
    width: 100%;
    aspect-ratio: 4 / 3; 
    background-color: var(--viewer-bg);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    margin-bottom: 2rem;
    overflow: hidden; 
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--text-secondary);
    position: relative;
}

model-viewer {
    width: 100%;
    height: 100%;
    background-color: transparent;
    outline: none;
}

.explode-btn {
    position: absolute;
    bottom: 20px;
    background-color: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-light);
    padding: 10px 20px;
    border-radius: 980px;
    font-family: 'Inter', sans-serif;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-main);
    cursor: pointer;
    z-index: 10;
    transition: all 0.2s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.explode-btn:hover {
    background-color: #ffffff;
    transform: scale(1.03);
}

.viewer-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.viewer-text {
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tech-specs {
    list-style: none;
    border-top: 1px solid var(--border-light);
}

.tech-specs li {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    font-size: 14px;
}

.spec-label { color: var(--text-secondary); }
.spec-value { font-weight: 500; color: var(--text-main); }

.roadmap {
    max-width: 650px;
    margin: 0 auto;
}

.roadmap-item {
    display: flex;
    gap: 3rem; 
    padding: 3rem 0; 
    border-bottom: 1px solid var(--border-light);
}

.roadmap-version {
    font-family: 'Inter', monospace;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-main);
    min-width: 80px;
    padding-top: 0.25rem; 
}

.roadmap-details h4 {
    font-size: 19px; 
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.roadmap-details p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 1.5rem; 
    line-height: 1.6;
}

.roadmap-subtasks {
    list-style: none;
    padding-left: 1.5rem; 
    border-left: 2px solid var(--border-light);
}

.roadmap-subtasks li {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 0.75rem; 
    position: relative;
    line-height: 1.5;
}

.roadmap-subtasks li:last-child {
    margin-bottom: 0;
}

.roadmap-subtasks li::before {
    content: "—";
    position: absolute;
    left: -1.5rem; 
    color: var(--border-light);
}

footer {
    padding: 100px 0;
    text-align: center;
    background-color: #fafafa;
}

.stealth-text {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    letter-spacing: 0.02em;
}

.support-btn {
    display: inline-block;
    background-color: var(--text-main);
    color: var(--bg-color);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 12px 24px;
    border-radius: 980px; 
    transition: transform 0.2s ease, opacity 0.2s ease;
    margin-top: 1rem;
}

.support-btn:hover {
    opacity: 0.8;
    transform: scale(1.02);
}

.copyright-notice {
    margin-top: 6rem;
    font-size: 12px;
    color: var(--border-light); 
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.copyright-notice:hover {
    color: var(--text-secondary);
    transition: color 0.3s ease;
}