/* Surpass - surpass.e-soul.org */

:root {
    color-scheme: dark light;

    --bg: #0b0f14;
    --surface: #121a23;
    --surface-2: #16212d;
    --border: #22303f;
    --text: #e8eef5;
    --muted: #94a5b8;
    --accent: #5aa9f0;
    --accent-soft: #5aa9f01f;
    --accent-ink: #04121f;
    --ok: #3fbf88;
    --warn: #e3a94b;

    --radius: 14px;
    --radius-sm: 9px;
    --wrap: 1080px;

    --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, SFMono-Regular, "Cascadia Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: light) {
    :root {
        --bg: #f5f8fc;
        --surface: #ffffff;
        --surface-2: #f0f4f9;
        --border: #dde5ef;
        --text: #0f1821;
        --muted: #56677c;
        --accent: #0b64c4;
        --accent-soft: #0b64c414;
        --accent-ink: #ffffff;
        --ok: #16875a;
        --warn: #9a6a08;
    }
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    font-size: clamp(1rem, 0.97rem + 0.15vw, 1.0625rem);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

/* A single soft light source behind the hero, echoing the logo. */
body::before {
    content: "";
    position: fixed;
    inset: -20vh 0 auto 0;
    height: 70vh;
    background: radial-gradient(60% 60% at 50% 0%, var(--accent-soft), transparent 70%);
    pointer-events: none;
    z-index: -1;
}

h1,
h2,
h3 {
    line-height: 1.2;
    letter-spacing: -0.02em;
    text-wrap: balance;
    margin: 0;
}

p {
    text-wrap: pretty;
}

a {
    color: var(--accent);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.2em;
}

img {
    max-width: 100%;
    height: auto;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

.wrap {
    width: min(var(--wrap), 100% - 2.5rem);
    margin-inline: auto;
}

.icon {
    width: 1.25em;
    height: 1.25em;
    flex: none;
    /* solid brand marks pick this up; outline symbols carry their own fill:none */
    fill: currentColor;
    vertical-align: -0.22em;
}

.skip {
    position: absolute;
    left: -9999px;
}

.skip:focus {
    left: 1rem;
    top: 1rem;
    z-index: 10;
    padding: 0.5rem 0.9rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

/* ---------- header ---------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 5;
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.site-header > .wrap {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    min-height: 3.5rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text);
    text-decoration: none;
    margin-right: auto;
}

.brand img {
    width: 26px;
    height: 26px;
    border-radius: 7px;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    font-size: 0.9375rem;
}

.site-nav a {
    color: var(--muted);
    text-decoration: none;
}

.site-nav a:hover {
    color: var(--text);
}

@media (max-width: 34rem) {
    .site-nav .nav-section {
        display: none;
    }
}

/* ---------- hero ---------- */

.hero {
    text-align: center;
    padding: clamp(3rem, 8vw, 6rem) 0 clamp(2.5rem, 6vw, 4rem);
}

.hero-logo {
    width: clamp(88px, 18vw, 116px);
    border-radius: 26px;
    border: 1px solid var(--border);
    box-shadow: 0 20px 50px -20px color-mix(in srgb, var(--accent) 40%, transparent);
}

.hero h1 {
    font-size: clamp(2.5rem, 1.7rem + 4vw, 4rem);
    margin: 1.25rem 0 0;
}

.tagline {
    font-size: clamp(1.125rem, 1rem + 0.8vw, 1.5rem);
    margin: 0.6rem auto 0;
    max-width: 34ch;
}

.lede {
    color: var(--muted);
    max-width: 58ch;
    margin: 1rem auto 0;
}

/* An intrinsically sized grid resolves equal 1fr tracks to the widest item's
   max-content width, so the buttons match each other and nothing more.
   fit-content sizes it the same way inline-grid would, while staying a block
   so it keeps its own line. */
.actions {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
    width: fit-content;
    gap: 0.75rem;
    margin: 2rem auto 0;
}

/* two full-width buttons no longer fit side by side */
@media (max-width: 34rem) {
    .actions {
        grid-auto-flow: row;
    }
}

/* ---------- buttons ---------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    padding: 0.7rem 1.15rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    font: inherit;
    font-size: 0.9375rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s, transform 0.15s;
}

.btn:hover {
    background: var(--surface-2);
    border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--accent-ink);
}

.btn-primary:hover {
    background: color-mix(in srgb, var(--accent) 85%, white);
    border-color: color-mix(in srgb, var(--accent) 85%, white);
}

/* ---------- trust chips ---------- */

.chips {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
    width: fit-content;
    gap: 0.5rem;
    margin: 2.5rem auto 0;
    padding: 0;
    list-style: none;
}

.chips li {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface);
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--muted);
}

.chips .icon {
    color: var(--accent);
    width: 0.95rem;
    height: 0.95rem;
}

/* one row of four stops fitting here; minmax lets the last of them shrink and
   wrap on very narrow phones instead of pushing the page sideways */
@media (max-width: 42rem) {
    .chips {
        grid-auto-flow: row;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* ---------- sections ---------- */

.section {
    padding: clamp(3rem, 7vw, 5rem) 0;
    border-top: 1px solid var(--border);
}

.section-head {
    margin-bottom: 2.25rem;
}

.section-head h2 {
    font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2rem);
}

.section-head p {
    color: var(--muted);
    margin: 0.5rem 0 0;
    max-width: 60ch;
}

/* the 60ch cap has to re-centre itself, or the text centres inside a
   left-aligned box and reads off to one side */
.section-head-center {
    text-align: center;
}

.section-head-center p {
    margin-inline: auto;
}

/* ---------- features ---------- */

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
    gap: 1rem;
    padding: 0;
    margin: 0;
    list-style: none;
}

.feature {
    padding: 1.35rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.feature-icon {
    display: grid;
    place-items: center;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 10px;
    background: var(--accent-soft);
    color: var(--accent);
    margin-bottom: 0.9rem;
}

.feature-icon .icon {
    width: 1.15rem;
    height: 1.15rem;
}

.feature h3 {
    font-size: 1rem;
    margin-bottom: 0.3rem;
}

.feature p {
    margin: 0;
    color: var(--muted);
    font-size: 0.9375rem;
}

/* ---------- screenshots ---------- */

/* the heading centres over the gallery, so the nav stacks beneath it instead
   of being pushed out to one side */
.gallery-head {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2.25rem;
}

.gallery-head .section-head {
    margin-bottom: 0;
}

.gallery-nav {
    display: flex;
    gap: 0.5rem;
}

.gallery-nav[hidden] {
    display: none;
}

.gallery-nav .btn {
    padding: 0.5rem;
}

/* on touch-sized screens swiping is the natural control */
@media (max-width: 40rem) {
    .gallery-nav {
        display: none;
    }
}

.shots {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    scroll-behavior: smooth;
    scroll-snap-type: x mandatory;
    padding-bottom: 1rem;
    /* full-bleed, but the first and last slide line up with the page gutter */
    padding-inline: max(1.25rem, calc((100% - var(--wrap)) / 2));
    scroll-padding-inline: max(1.25rem, calc((100% - var(--wrap)) / 2));
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
    overscroll-behavior-x: contain;
}

.shot {
    flex: none;
    width: min(85vw, 620px);
    margin: 0;
    scroll-snap-align: start;
    background: var(--surface);
    border: 1px solid var(--border);
    /* the card shrinks with the viewport, so the corners shrink with it */
    border-radius: clamp(var(--radius-sm), 2.2vw, var(--radius));
    overflow: hidden;
}

.shot img {
    display: block;
    width: 100%;
    border-bottom: 1px solid var(--border);
}

.shot figcaption {
    padding: 0.9rem 1.1rem 1.05rem;
}

.shot figcaption strong {
    display: block;
    font-size: 0.9375rem;
}

.shot figcaption span {
    color: var(--muted);
    font-size: 0.875rem;
}

/* ---------- changelog ---------- */

.changelog {
    list-style: none;
    /* narrower than the page, so on wide screens the entries sit under the
       centred heading instead of trailing off to the left */
    max-width: 46rem;
    margin: 0 auto;
    padding: 0;
}

.changelog > li {
    padding: 1.5rem 0;
    border-top: 1px solid var(--border);
}

.changelog > li:first-child {
    border-top: 0;
    padding-top: 0;
}

.version {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.6rem;
    font-family: var(--mono);
    font-size: 1.0625rem;
    font-weight: 600;
}

.tag {
    display: flex;
    align-items: center;
    justify-content: center;
    /* the two tags are in separate rows, so no grid can match them up; this is a
       floor wide enough for the longest label, in em so it tracks the font size */
    min-width: 9em;
    padding: 0.1rem 0.55rem;
    border-radius: 999px;
    font-family: var(--sans);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    white-space: nowrap;
}

.tag-latest {
    color: var(--ok);
    background: color-mix(in srgb, var(--ok) 14%, transparent);
    border: 1px solid color-mix(in srgb, var(--ok) 35%, transparent);
}

.tag-wip {
    color: var(--warn);
    background: color-mix(in srgb, var(--warn) 14%, transparent);
    border: 1px solid color-mix(in srgb, var(--warn) 35%, transparent);
}

.changelog ul {
    margin: 0;
    padding-left: 1.1rem;
    color: var(--muted);
}

.changelog li li {
    margin-bottom: 0.25rem;
}

.changelog .empty {
    margin: 0;
    color: var(--muted);
    font-style: italic;
}

/* ---------- footer ---------- */

.site-footer {
    border-top: 1px solid var(--border);
    padding: 2.5rem 0;
    color: var(--muted);
    font-size: 0.875rem;
}

.site-footer > .wrap {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-links a {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    color: var(--muted);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--text);
}

/* ---------- 404 ---------- */

.notfound {
    display: grid;
    place-content: center;
    text-align: center;
    min-height: 70vh;
    gap: 1rem;
}

.notfound .code {
    font-family: var(--mono);
    font-size: clamp(3rem, 10vw, 5rem);
    color: var(--accent);
    line-height: 1;
}

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

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}