:root {
    color-scheme: dark;
    --bg: #050707;
    --panel: rgba(10, 15, 14, 0.88);
    --panel-strong: rgba(17, 27, 25, 0.94);
    --line: rgba(211, 235, 226, 0.2);
    --line-strong: rgba(225, 210, 139, 0.52);
    --text: #f6f1e7;
    --muted: #b8c4bf;
    --gold: #e2ce80;
    --aqua: #9ff0e5;
    --ink: #030505;
    --max: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Avenir Next", "Helvetica Neue", Helvetica, Arial, sans-serif;
    background:
        linear-gradient(rgba(3, 5, 5, 0.82), rgba(3, 5, 5, 0.94)),
        url("assets/stella-cordis/stella_faceplate_concept_light.png") center top / 1550px auto fixed,
        var(--bg);
    color: var(--text);
}

a {
    color: inherit;
}

.nav {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    padding: 18px clamp(18px, 5vw, 56px);
    border-bottom: 1px solid var(--line);
    background: rgba(4, 7, 7, 0.88);
    backdrop-filter: blur(16px);
}

.nav img {
    width: min(238px, 48vw);
    display: block;
}

.nav nav {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.nav a {
    text-decoration: none;
}

.hero,
.section,
.footer {
    width: min(calc(100% - 36px), var(--max));
    margin: 0 auto;
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
    gap: clamp(34px, 5vw, 72px);
    align-items: center;
    min-height: calc(100vh - 74px);
    padding: clamp(48px, 8vw, 96px) 0;
}

.hero-copy {
    position: relative;
    z-index: 2;
    max-width: 720px;
}

.product-hero {
    position: relative;
    padding-bottom: clamp(86px, 10vw, 124px);
}

.hero-signature {
    position: absolute;
    right: 0;
    bottom: clamp(24px, 4vw, 42px);
    left: 0;
    display: flex;
    justify-content: space-between;
    gap: 18px;
    border-top: 1px solid rgba(246, 241, 231, 0.22);
    padding-top: 16px;
    color: var(--aqua);
    font-size: 12px;
    font-weight: 950;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.hero-signature span:last-child {
    color: var(--gold);
}

.eyebrow {
    margin: 0 0 12px;
    color: var(--aqua);
    font-size: 12px;
    font-weight: 950;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.division {
    color: var(--gold);
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    margin-bottom: 22px;
    font-size: clamp(56px, 7.4vw, 104px);
    line-height: 0.86;
    letter-spacing: 0;
    text-transform: uppercase;
}

h2 {
    margin-bottom: 18px;
    font-size: clamp(34px, 5.6vw, 68px);
    line-height: 0.96;
}

h3 {
    font-size: 22px;
    line-height: 1.12;
}

.lead {
    color: #dce9e4;
    font-size: clamp(19px, 2.2vw, 27px);
    line-height: 1.36;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.button {
    display: inline-flex;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line-strong);
    border-radius: 4px;
    padding: 13px 18px;
    color: var(--text);
    background: rgba(8, 12, 12, 0.78);
    font-size: 13px;
    font-weight: 950;
    letter-spacing: 0.08em;
    text-align: center;
    text-decoration: none;
    text-transform: uppercase;
}

.button.primary {
    color: var(--ink);
    background: linear-gradient(90deg, var(--gold), #f2e4af 52%, var(--aqua));
    border-color: rgba(246, 241, 231, 0.72);
}

.button.full {
    width: 100%;
}

.faceplate {
    width: min(100%, 610px);
    justify-self: end;
    transform: translateY(clamp(36px, 6vw, 86px));
    border: 1px solid rgba(246, 241, 231, 0.26);
    background:
        linear-gradient(90deg, rgba(159, 240, 229, 0.12), transparent 36%, rgba(226, 206, 128, 0.12)),
        rgba(4, 7, 7, 0.84);
    box-shadow: inset 0 0 46px rgba(0, 0, 0, 0.78), 0 0 42px rgba(159, 240, 229, 0.13);
    clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
    overflow: hidden;
}

.faceplate img {
    display: block;
    width: 100%;
}

.section {
    padding: clamp(56px, 8vw, 104px) 0;
    border-top: 1px solid var(--line);
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.card,
.checkout,
.download-card {
    border: 1px solid var(--line);
    background: linear-gradient(180deg, var(--panel-strong), rgba(5, 8, 8, 0.94));
    padding: clamp(20px, 3vw, 30px);
}

.card p,
.checkout p,
.download-card p,
.spec-list li {
    color: var(--muted);
    line-height: 1.55;
}

.code {
    color: var(--gold);
    font-size: 13px;
    font-weight: 950;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.demo {
    display: grid;
    grid-template-columns: minmax(280px, 0.54fr) minmax(360px, 1fr);
    gap: 24px;
    align-items: center;
}

video {
    display: block;
    width: 100%;
    border: 1px solid var(--line);
    background: #020303;
}

.audit-panel {
    display: grid;
    gap: 12px;
    border: 1px solid var(--line);
    background:
        linear-gradient(135deg, rgba(160, 255, 240, 0.12), rgba(2, 3, 3, 0.86) 42%),
        linear-gradient(180deg, var(--panel-strong), rgba(5, 8, 8, 0.94));
    padding: clamp(18px, 3vw, 28px);
}

.audit-panel div {
    display: grid;
    gap: 6px;
    padding: 16px 0;
    border-bottom: 1px solid rgba(211, 235, 226, 0.18);
}

.audit-panel div:last-child {
    border-bottom: 0;
}

.audit-panel span {
    color: var(--gold);
    font-weight: 950;
    letter-spacing: 0.14em;
}

.audit-panel strong {
    color: var(--text);
    font-size: 18px;
}

.audit-panel p {
    margin: 0;
    color: var(--muted);
    line-height: 1.5;
}

.buy {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 430px);
    gap: clamp(24px, 5vw, 64px);
    align-items: start;
}

.price {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: baseline;
    border-bottom: 1px solid var(--line);
    padding-bottom: 18px;
    margin-bottom: 18px;
}

.price span {
    color: var(--muted);
    font-weight: 950;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.price strong {
    color: var(--gold);
    font-size: 42px;
}

.meter {
    margin: 16px 0 24px;
}

.meter span {
    display: block;
    color: var(--aqua);
    font-size: 12px;
    font-weight: 950;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.meter i {
    display: block;
    height: 8px;
    margin-top: 8px;
    border: 1px solid rgba(211, 235, 226, 0.28);
    background: linear-gradient(90deg, var(--gold), var(--aqua));
}

.platforms {
    display: grid;
    gap: 10px;
    margin: 22px 0;
}

.platforms div {
    border: 1px solid var(--line);
    padding: 14px 16px;
    color: var(--text);
    font-weight: 950;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.platforms small {
    display: block;
    margin-top: 4px;
    color: var(--aqua);
}

.spec-list {
    display: grid;
    gap: 10px;
    padding-left: 18px;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-top: 28px;
}

.note {
    margin-top: 18px;
    color: var(--muted);
    font-size: 14px;
}

.footer {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    padding: 28px 0 48px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 950;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

@media (max-width: 900px) {
    .hero,
    .demo,
    .buy,
    .grid,
    .download-grid {
        grid-template-columns: 1fr;
    }

    .nav {
        position: static;
        align-items: flex-start;
        flex-direction: column;
    }

    .hero-copy {
        max-width: none;
    }

    .faceplate {
        width: 100%;
        justify-self: stretch;
        transform: none;
    }

    .hero-signature {
        position: static;
        flex-direction: column;
        margin-top: 20px;
    }
}

@media (max-width: 560px) {
    h1 {
        font-size: clamp(38px, 12vw, 50px);
    }
}