:root {
    color-scheme: dark;
    --midnight: #050c1b;
    --ink: #eaf8ff;
    --muted: #a7bac8;
    --cyan: #73f2ff;
    --line: rgba(115, 242, 255, 0.28);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--midnight);
    color: var(--ink);
    font-family: "Trebuchet MS", "Segoe UI", sans-serif;
}

.hero {
    min-height: 100svh;
    position: relative;
    display: grid;
    place-items: center;
    overflow: hidden;
    isolation: isolate;
    background: linear-gradient(180deg, rgba(3, 8, 18, 0.12) 42%, var(--midnight) 100%), url("../Assets/banner.png") center / cover no-repeat;
}

.hero::after {
    content: "";
    position: absolute;
    z-index: -1;
    inset: 45% 0 0;
    background: linear-gradient(180deg, transparent, var(--midnight) 92%);
}

.hero__content {
    width: min(42rem, calc(100% - 3rem));
    margin-top: 4rem;
    text-align: center;
    text-shadow: 0 2px 22px rgba(0, 0, 0, 0.75);
    animation: fade-up 900ms ease both;
}

.eyebrow {
    margin: 0 0 1rem;
    color: var(--cyan);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

h1,
h2 {
    margin: 0;
    font-family: Georgia, "Times New Roman", serif;
    font-weight: 400;
    letter-spacing: 0;
}

h1 {
    font-size: clamp(3.5rem, 13vw, 8rem);
    line-height: 0.95;
}

.hero__intro {
    max-width: 34rem;
    margin: 1.5rem auto 2rem;
    color: #d6e5ec;
    font-size: clamp(1rem, 2vw, 1.2rem);
    line-height: 1.7;
}

.hero__link {
    display: inline-flex;
    gap: 0.75rem;
    align-items: center;
    padding: 0.85rem 1.1rem;
    border: 1px solid var(--line);
    color: var(--ink);
    font-size: 0.9rem;
    text-decoration: none;
    transition: border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.hero__link:hover,
.hero__link:focus-visible {
    border-color: var(--cyan);
    color: var(--cyan);
    transform: translateY(-2px);
}

.scroll-cue {
    position: absolute;
    bottom: 2rem;
    display: grid;
    justify-items: center;
    gap: 0.65rem;
    color: var(--muted);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-decoration: none;
    text-transform: uppercase;
}

.scroll-cue span {
    width: 1px;
    height: 3rem;
    background: linear-gradient(var(--cyan), transparent);
}

.roadmap {
    min-height: 100svh;
    padding: 8rem 1.5rem 16rem;
    background: var(--midnight);
}

.roadmap__inner {
    width: min(50rem, 100%);
    margin: 0 auto;
    animation: fade-up 900ms 150ms ease both;
}

h2 {
    max-width: 34rem;
    font-size: clamp(2.5rem, 7vw, 5rem);
    line-height: 1;
}

.roadmap__lead {
    max-width: 32rem;
    margin: 1.5rem 0 4rem;
    color: var(--muted);
    font-size: 1.1rem;
    line-height: 1.7;
}

.roadmap__list {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: 1.5rem;
    row-gap: 3rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.roadmap__list li {
    border-top: 1px solid var(--line);
}

.roadmap__list li:nth-child(1) {
    grid-column: 1 / span 7;
}

.roadmap__list li:nth-child(2) {
    grid-column: 6 / span 7;
    margin-top: 5rem;
}

.roadmap__list li:nth-child(3) {
    grid-column: 3 / span 7;
    margin-top: -1rem;
}

.roadmap__list details {
    padding: 1.5rem 0;
}

.roadmap__list summary {
    display: grid;
    grid-template-columns: 4rem 1fr auto;
    gap: 1rem;
    align-items: center;
    cursor: pointer;
    list-style: none;
}

.roadmap__list summary::-webkit-details-marker {
    display: none;
}

.roadmap__list summary::after {
    content: "+";
    color: var(--cyan);
    font-size: 1.5rem;
    font-weight: 300;
    transition: transform 180ms ease;
}

.roadmap__list details[open] summary::after {
    transform: rotate(45deg);
}

.roadmap__panel {
    display: grid;
    grid-template-rows: 0fr;
    opacity: 0;
    overflow: clip;
    transition: grid-template-rows 500ms cubic-bezier(0.22, 1, 0.36, 1), opacity 350ms ease;
}

.roadmap__panel > .roadmap__media {
    min-height: 0;
    overflow: hidden;
}

.roadmap__list details[open] .roadmap__panel {
    grid-template-rows: 1fr;
    opacity: 1;
}

.roadmap__list summary span {
    color: var(--cyan);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
}

.roadmap__list summary strong {
    font-size: clamp(1rem, 2vw, 1.35rem);
    font-weight: 400;
}

.roadmap__media {
    max-width: 42rem;
    margin: 1.5rem 0 0 5rem;
}

.roadmap__media img,
.roadmap__media video {
    display: block;
    width: 100%;
    aspect-ratio: 2 / 1;
    border: 1px solid var(--line);
    object-fit: cover;
}

.roadmap__media figcaption {
    margin-top: 0.75rem;
    color: var(--muted);
    font-size: 0.85rem;
    line-height: 1.5;
}

@media (max-width: 600px) {
    .hero__content {
        margin-top: 0;
    }

    .hero {
        background-position: 58% center;
    }

    .roadmap {
        padding: 6rem 1.5rem 12rem;
    }

    .roadmap__list {
        display: grid;
        grid-template-columns: 1fr;
        row-gap: 0;
    }

    .roadmap__list li:nth-child(1),
    .roadmap__list li:nth-child(2),
    .roadmap__list li:nth-child(3) {
        grid-column: auto;
        margin-top: 0;
    }

    .roadmap__media {
        margin-left: 0;
    }
}

@keyframes fade-up {
    from {
        opacity: 0;
        transform: translateY(1rem);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .hero__content,
    .roadmap__inner {
        animation: none;
    }

    .roadmap__panel,
    .roadmap__list summary::after {
        transition: none;
    }
}