:root {
    --primary: #6d7cff;
    --secondary: #00d4ff;
    --bg: #050816;
    --card: rgba(18, 24, 45, 0.78);
    --text: #f8fbff;
    --muted: #aab4c4;
    --line: rgba(255, 255, 255, 0.12);
    --glass: rgba(255, 255, 255, 0.07);
    --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

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

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 15% 10%, color-mix(in srgb, var(--primary) 34%, transparent), transparent 28rem),
        radial-gradient(circle at 85% 12%, color-mix(in srgb, var(--secondary) 30%, transparent), transparent 26rem),
        linear-gradient(145deg, rgba(255, 255, 255, 0.05), transparent 30rem),
        var(--bg);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: linear-gradient(to bottom, black, transparent 80%);
}

a {
    color: inherit;
}

.site-shell {
    position: relative;
    z-index: 1;
    min-height: 100vh;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    border-bottom: 1px solid color-mix(in srgb, var(--primary) 34%, var(--line));
    background:
        linear-gradient(90deg, color-mix(in srgb, var(--primary) 18%, transparent), color-mix(in srgb, var(--secondary) 14%, transparent)),
        rgba(4, 7, 18, 0.78);
    backdrop-filter: blur(22px);
    box-shadow: 0 16px 50px color-mix(in srgb, var(--primary) 12%, transparent);
}

.header-inner {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 24px;
    padding: 16px 0;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo {
    width: 46px;
    height: 46px;
    border-radius: 16px;
    display: grid;
    place-items: center;
    font-weight: 900;
    color: white;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    box-shadow: 0 12px 30px color-mix(in srgb, var(--primary) 42%, transparent);
}

.brand-copy strong {
    display: block;
    font-size: 1rem;
    letter-spacing: 0.02em;
}

.brand-copy span {
    display: block;
    margin-top: 3px;
    color: var(--muted);
    font-size: 0.78rem;
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid color-mix(in srgb, var(--primary) 45%, var(--line));
    border-radius: 14px;
    color: var(--text);
    background: linear-gradient(135deg, color-mix(in srgb, var(--primary) 20%, transparent), color-mix(in srgb, var(--secondary) 14%, transparent));
    cursor: pointer;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
    display: block;
    width: 18px;
    height: 2px;
    margin: auto;
    border-radius: 99px;
    background: currentColor;
    transition: 0.2s ease;
}

.nav-toggle span::before,
.nav-toggle span::after {
    content: "";
    position: relative;
}

.nav-toggle span::before {
    top: -7px;
}

.nav-toggle span::after {
    top: 5px;
}

.nav-toggle.is-open span {
    background: transparent;
}

.nav-toggle.is-open span::before {
    top: 0;
    transform: rotate(45deg);
    background: var(--text);
}

.nav-toggle.is-open span::after {
    top: -2px;
    transform: rotate(-45deg);
    background: var(--text);
}

.site-nav {
    justify-self: center;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px;
    border: 1px solid color-mix(in srgb, var(--primary) 36%, var(--line));
    border-radius: 999px;
    background:
        linear-gradient(135deg, color-mix(in srgb, var(--primary) 18%, transparent), color-mix(in srgb, var(--secondary) 12%, transparent)),
        rgba(255, 255, 255, 0.05);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 10px 36px color-mix(in srgb, var(--primary) 13%, transparent);
}

.site-nav a,
.version-switcher a {
    text-decoration: none;
    color: var(--muted);
    transition: 0.2s ease;
}

.site-nav a {
    padding: 10px 14px;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 700;
}

.site-nav a:hover,
.site-nav a.is-active {
    color: white;
    background: linear-gradient(135deg, color-mix(in srgb, var(--primary) 65%, transparent), color-mix(in srgb, var(--secondary) 55%, transparent));
    box-shadow: 0 8px 22px color-mix(in srgb, var(--primary) 22%, transparent);
}

.version-switcher {
    display: flex;
    align-items: center;
    gap: 8px;
}

.version-switcher a {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 12px;
    border: 1px solid color-mix(in srgb, var(--primary) 30%, var(--line));
    border-radius: 999px;
    background:
        linear-gradient(135deg, color-mix(in srgb, var(--primary) 12%, transparent), color-mix(in srgb, var(--secondary) 8%, transparent)),
        rgba(255, 255, 255, 0.045);
    font-size: 0.8rem;
    font-weight: 800;
}

.version-dot {
    flex: 0 0 auto;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--dot-primary), var(--dot-secondary));
    box-shadow: 0 0 16px var(--dot-secondary);
}

.version-switcher a:hover,
.version-switcher a.is-active {
    color: white;
    border-color: color-mix(in srgb, var(--primary) 55%, white 12%);
    background: linear-gradient(135deg, color-mix(in srgb, var(--primary) 42%, transparent), color-mix(in srgb, var(--secondary) 32%, transparent));
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 14%, transparent);
}

main {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
    padding: 72px 0 48px;
}

.hero {
    position: relative;
    overflow: hidden;
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
    gap: 36px;
    align-items: stretch;
    min-height: 520px;
    padding: clamp(32px, 6vw, 72px);
    border: 1px solid var(--line);
    border-radius: 34px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.035)),
        linear-gradient(135deg, color-mix(in srgb, var(--primary) 18%, transparent), color-mix(in srgb, var(--secondary) 12%, transparent));
    box-shadow: var(--shadow);
}

.hero::after {
    content: "";
    position: absolute;
    inset: auto -12% -35% 28%;
    height: 360px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    filter: blur(90px);
    opacity: 0.28;
}

.hero-content,
.hero-panel {
    position: relative;
    z-index: 1;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 22px;
    padding: 9px 13px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: white;
    background: rgba(255, 255, 255, 0.07);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.eyebrow::before {
    content: "";
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--secondary);
    box-shadow: 0 0 20px var(--secondary);
}

.hero h1,
.page-hero h1 {
    max-width: 840px;
    font-size: clamp(2.7rem, 7vw, 6.6rem);
    line-height: 0.92;
    letter-spacing: -0.08em;
}

.hero p,
.page-hero p {
    max-width: 720px;
    margin-top: 24px;
    color: #c2cbda;
    font-size: clamp(1rem, 2vw, 1.18rem);
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 34px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 18px;
    border: 1px solid var(--line);
    border-radius: 16px;
    color: white;
    text-decoration: none;
    font-weight: 900;
    background: rgba(255, 255, 255, 0.07);
    transition: 0.2s ease;
}

.button.primary {
    border-color: transparent;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    box-shadow: 0 18px 40px color-mix(in srgb, var(--primary) 30%, transparent);
}

.button:hover {
    transform: translateY(-2px);
}

.hero-panel {
    align-self: stretch;
    display: grid;
    align-content: space-between;
    gap: 18px;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 26px;
    background: rgba(0, 0, 0, 0.22);
}

.system-label {
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.system-orb {
    width: 100%;
    aspect-ratio: 1;
    max-height: 260px;
    border: 1px solid var(--line);
    border-radius: 50%;
    background:
        radial-gradient(circle at 50% 50%, white 0 2%, transparent 3%),
        radial-gradient(circle at 50% 50%, color-mix(in srgb, var(--secondary) 70%, transparent) 0 12%, transparent 13%),
        radial-gradient(circle at 50% 50%, transparent 0 36%, color-mix(in srgb, var(--primary) 48%, transparent) 37% 38%, transparent 39% 55%, color-mix(in srgb, var(--secondary) 40%, transparent) 56% 57%, transparent 58%);
    box-shadow: inset 0 0 70px rgba(255, 255, 255, 0.08), 0 0 80px color-mix(in srgb, var(--primary) 22%, transparent);
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-top: 26px;
}

.stat,
.mini-stat {
    border: 1px solid var(--line);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.055);
}

.stat {
    padding: 18px;
}

.stat span,
.mini-stat span {
    display: block;
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.stat strong,
.mini-stat strong {
    display: block;
    margin-top: 8px;
    font-size: 1rem;
}

.section {
    margin-top: 82px;
}

.section-header {
    max-width: 760px;
    margin-bottom: 28px;
}

.section-kicker {
    margin-bottom: 10px;
    color: var(--secondary);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.section h2,
.page-hero h1 {
    font-size: clamp(2rem, 4vw, 3.8rem);
    line-height: 1;
    letter-spacing: -0.05em;
}

.section-header p {
    margin-top: 14px;
    color: var(--muted);
    line-height: 1.8;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.grid.two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
    position: relative;
    overflow: hidden;
    min-height: 230px;
    padding: 26px;
    border: 1px solid var(--line);
    border-radius: 26px;
    background: var(--card);
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.18);
    transition: 0.22s ease;
}

.card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, color-mix(in srgb, var(--primary) 18%, transparent), transparent 42%);
    opacity: 0;
    transition: 0.22s ease;
}

.card:hover {
    transform: translateY(-6px);
    border-color: color-mix(in srgb, var(--primary) 42%, white 10%);
}

.card:hover::before {
    opacity: 1;
}

.card > * {
    position: relative;
    z-index: 1;
}

.card-meta {
    display: inline-flex;
    margin-bottom: 18px;
    padding: 7px 10px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--secondary);
    background: rgba(255, 255, 255, 0.055);
    font-size: 0.75rem;
    font-weight: 900;
}

.card h3 {
    font-size: 1.26rem;
    margin-bottom: 12px;
}

.card p {
    color: #c3ccda;
    line-height: 1.72;
}

.story {
    display: grid;
    grid-template-columns: 0.82fr 1.18fr;
    gap: 22px;
    align-items: stretch;
}

.story-panel {
    padding: 30px;
    border: 1px solid var(--line);
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.06);
}

.story-panel p {
    color: #c3ccda;
    line-height: 1.8;
}

.mini-stats {
    display: grid;
    gap: 14px;
}

.mini-stat {
    padding: 18px;
}

.page-hero {
    padding: 52px;
    border: 1px solid var(--line);
    border-radius: 32px;
    background:
        linear-gradient(135deg, color-mix(in srgb, var(--primary) 18%, transparent), transparent),
        rgba(255, 255, 255, 0.055);
    box-shadow: var(--shadow);
}

.resource-card {
    min-height: 310px;
}

.video-frame {
    overflow: hidden;
    margin: -26px -26px 22px;
    border-bottom: 1px solid var(--line);
    background: rgba(0, 0, 0, 0.22);
}

.video-frame iframe,
.video-placeholder {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    border: 0;
}

.video-placeholder {
    display: grid;
    place-items: center;
    color: var(--muted);
    background:
        radial-gradient(circle at center, color-mix(in srgb, var(--primary) 28%, transparent), transparent 55%),
        rgba(255, 255, 255, 0.04);
    font-weight: 900;
}

.download-card {
    display: grid;
    align-content: space-between;
    gap: 24px;
}

.download-card .button {
    width: fit-content;
}

.footer {
    width: min(1180px, calc(100% - 40px));
    margin: 34px auto 0;
    padding: 34px 0 44px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 16px;
}

.footer a {
    color: white;
    text-decoration: none;
}

@media (max-width: 1020px) {
    .header-inner {
        grid-template-columns: auto auto;
    }

    .nav-toggle {
        display: inline-grid;
        justify-self: end;
    }

    .site-nav,
    .version-switcher {
        display: none;
        grid-column: 1 / -1;
        justify-self: stretch;
    }

    .site-nav.is-open,
    .version-switcher.is-open {
        display: flex;
    }

    .site-nav {
        justify-content: center;
        flex-wrap: wrap;
        border-radius: 22px;
    }

    .version-switcher {
        justify-content: center;
        flex-wrap: wrap;
    }

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

    .hero-panel {
        min-height: 360px;
    }

    .grid,
    .grid.two,
    .stat-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .header-inner,
    main,
    .footer {
        width: min(100% - 28px, 1180px);
    }

    main {
        padding-top: 38px;
    }

    .hero,
    .page-hero {
        padding: 28px;
        border-radius: 24px;
    }

    .brand-copy span {
        display: none;
    }
}