:root {
    --bg-base: #0B0B0D;
    --bg-elevated: #111114;
    --bg-card: #131317;
    --bg-card-hover: #17171C;
    --bg-soon: #0E0E10;
    --border-subtle: #1E1E24;
    --border-card: #23232B;
    --border-hover: #333040;
    --text-primary: #EDEBE4;
    --text-secondary: #8A8880;
    --text-tertiary: #5A5952;
    --text-dim: #44433D;
    --accent: #C4B48A;
    --accent-soft: #8C7F5E;
    --accent-dim: #3D3629;
    --status-dot: #C4B48A;
    --banner-bg: #1A170E;
    --banner-border: #3D3629;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, monospace;
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --container: 1180px;
}

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

html {
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.45;
    min-height: 100vh;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

.prototype-banner {
    width: 100%;
    background: var(--banner-bg);
    border-bottom: 1px solid var(--banner-border);
    padding: 5px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.banner-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
    animation: pulse-dot 2.5s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 0.5; transform: scale(0.9); }
    50% { opacity: 1; transform: scale(1.1); }
}

.banner-text {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.01em;
    opacity: 0.92;
}

.navbar {
    position: sticky;
    top: 26px;
    z-index: 99;
    background: rgba(11, 11, 13, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
}

.nav-container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 9px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.logo-mark {
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-mark svg {
    width: 24px;
    height: 24px;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-primary {
    font-size: 0.95rem;
    font-weight: 650;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.logo-sub {
    font-size: 0.62rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--text-tertiary);
    margin-top: 1px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2px;
}

.nav-link {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 5px 10px;
    border-radius: var(--radius-sm);
    transition: color 0.18s ease, background-color 0.18s ease;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-elevated);
}

.nav-external {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.74rem;
    font-weight: 500;
    color: var(--text-tertiary);
    padding: 5px 9px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    transition: all 0.18s ease;
    flex-shrink: 0;
}

.nav-external:hover {
    color: var(--text-primary);
    border-color: var(--border-card);
    background: var(--bg-elevated);
}

.main-container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 16px 24px 14px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.hero {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 0;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    color: var(--text-tertiary);
}

.tag-bracket {
    color: var(--accent-dim);
}

.tag-text {
    color: var(--text-secondary);
}

.hero-title {
    font-size: 1.8rem;
    font-weight: 600;
    line-height: 1.14;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

.title-dim {
    color: var(--text-secondary);
    font-weight: 500;
}

.hero-subtitle {
    font-size: 0.82rem;
    color: var(--text-secondary);
    max-width: 500px;
    line-height: 1.48;
    font-weight: 400;
}

.section {
    display: flex;
    flex-direction: column;
    gap: 9px;
}

.section-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    padding-bottom: 0;
    border-bottom: 1px solid var(--border-subtle);
}

.section-title-wrap {
    display: flex;
    align-items: baseline;
    gap: 9px;
    padding-bottom: 5px;
}

.section-index {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    font-weight: 500;
    color: var(--accent-soft);
    letter-spacing: 0.02em;
}

.section-title {
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.section-meta {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 0.66rem;
    color: var(--text-tertiary);
    font-weight: 500;
    padding-bottom: 5px;
}

.meta-dot {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: var(--text-dim);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    padding: 12px 12px 10px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    transition: transform 0.22s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.22s ease,
                background-color 0.22s ease;
    position: relative;
    min-height: 126px;
}

.project-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent-dim);
    background: var(--bg-card-hover);
}

.project-card.project-soon {
    background: var(--bg-soon);
    border-color: var(--border-subtle);
    opacity: 0.72;
}

.project-card.project-soon:hover {
    border-color: var(--border-card);
    opacity: 0.85;
}

.card-status {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    padding: 3px 7px;
    border-radius: var(--radius-sm);
    width: fit-content;
}

.status-dev {
    color: var(--accent);
    background: rgba(196, 180, 138, 0.07);
    border: 1px solid rgba(196, 180, 138, 0.14);
}

.status-soon {
    color: var(--text-tertiary);
    background: rgba(90, 89, 82, 0.06);
    border: 1px solid rgba(90, 89, 82, 0.12);
}

.status-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    flex-shrink: 0;
}

.status-dev .status-dot {
    background: var(--status-dot);
    animation: pulse-dot 2s ease-in-out infinite;
}

.status-soon .status-dot {
    background: var(--text-dim);
}

.card-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: rgba(196, 180, 138, 0.06);
    border: 1px solid rgba(196, 180, 138, 0.12);
    color: var(--accent);
}

.card-icon svg {
    width: 17px;
    height: 17px;
}

.icon-muted {
    background: rgba(90, 89, 82, 0.05);
    border: 1px solid rgba(90, 89, 82, 0.1);
    color: var(--text-tertiary);
}

.project-title {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text-primary);
    margin-top: 0;
}

.title-muted {
    color: var(--text-tertiary);
}

.project-category {
    font-family: var(--font-mono);
    font-size: 0.58rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    padding: 0;
}

.cat-muted {
    color: var(--text-dim);
}

.project-desc {
    font-size: 0.74rem;
    color: var(--text-secondary);
    line-height: 1.45;
    font-weight: 400;
}

.desc-muted {
    color: var(--text-tertiary);
}

.systems-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.system-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    padding: 12px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    transition: transform 0.22s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.22s ease,
                background-color 0.22s ease;
}

.system-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent-dim);
    background: var(--bg-card-hover);
}

.system-icon-wrap {
    width: 34px;
    height: 34px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: rgba(196, 180, 138, 0.06);
    border: 1px solid rgba(196, 180, 138, 0.12);
    color: var(--accent);
    margin-top: 0;
}

.system-icon-wrap svg {
    width: 18px;
    height: 18px;
}

.system-content {
    display: flex;
    flex-direction: column;
    gap: 5px;
    flex: 1;
    min-width: 0;
}

.system-content .card-status {
    margin-bottom: 0;
}

.system-title {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.system-desc {
    font-size: 0.74rem;
    color: var(--text-secondary);
    line-height: 1.45;
}

.footer {
    padding-top: 6px;
    border-top: 1px solid var(--border-subtle);
    margin-top: 0;
}

.footer-row {
    display: flex;
    align-items: flex-start;
    gap: 36px;
    flex-wrap: wrap;
}

.footer-block {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.footer-label {
    font-family: var(--font-mono);
    font-size: 0.56rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--text-dim);
    text-transform: uppercase;
}

.footer-value {
    font-size: 0.72rem;
    color: var(--text-secondary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 7px;
}

.footer-dim {
    color: var(--text-tertiary);
}

.footer-arrow {
    color: var(--accent-dim);
    font-weight: 600;
}

.footer-mono {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 400;
}

.footer-dot {
    width: 5px;
    height: 5px;
    background: var(--accent);
    animation: pulse-dot 2s ease-in-out infinite;
}

@media (max-width: 900px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-title {
        font-size: 1.95rem;
    }

    .footer-row {
        gap: 28px;
    }
}

@media (max-width: 640px) {
    .prototype-banner {
        padding: 7px 16px;
    }

    .banner-text {
        font-size: 0.7rem;
    }

    .navbar {
        top: 33px;
    }

    .nav-container {
        padding: 12px 16px;
        gap: 12px;
    }

    .logo-sub {
        display: none;
    }

    .nav-links {
        gap: 0;
    }

    .nav-link {
        font-size: 0.78rem;
        padding: 5px 9px;
    }

    .nav-external span:not(.nav-external svg) {
        display: none;
    }

    .main-container {
        padding: 24px 16px 28px;
        gap: 28px;
    }

    .hero-title {
        font-size: 1.6rem;
    }

    .hero-subtitle {
        font-size: 0.88rem;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
    }

    .section-meta {
        padding-bottom: 10px;
    }

    .projects-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .project-card {
        min-height: auto;
    }

    .systems-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .footer-row {
        flex-direction: column;
        gap: 16px;
    }
}

@media (max-width: 420px) {
    .nav-links .nav-link:nth-child(3) {
        display: none;
    }
}