:root {
    --azure: #2F8CFF;
    --sky: #73D2FF;
    --deep: #172B69;
    --cloud: #F6FBFF;
    --gold: #F5C84C;
    --violet: #7857FF;

    --ink: #172B69;
    --ink-soft: #5A6B96;
    --ink-faint: #8D9BBD;
    --surface: #FFFFFF;
    --sunken: #EDF5FE;
    --hairline: #DCE8F7;
    --page: #F6FBFF;
}

@media (prefers-color-scheme: dark) {
    :root {
        --ink: #EAF2FF;
        --ink-soft: #A9BADD;
        --ink-faint: #7C8CB0;
        --surface: #14204A;
        --sunken: #0F1937;
        --hairline: #26355F;
        --page: #0B1330;
    }
}

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

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--page);
    color: var(--ink);
    font: 400 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

/* Soft cool glow behind the page, matching the app's surfaces. */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -1;
    background:
        radial-gradient(48rem 32rem at 12% -8%, color-mix(in srgb, var(--sky) 30%, transparent), transparent 70%),
        radial-gradient(42rem 30rem at 92% 4%, color-mix(in srgb, var(--azure) 18%, transparent), transparent 70%),
        radial-gradient(34rem 26rem at 82% 96%, color-mix(in srgb, var(--violet) 14%, transparent), transparent 70%);
}

.wrap { max-width: 46rem; margin: 0 auto; padding: 0 1.5rem; }
.wrap--wide { max-width: 60rem; }

/* ---------------------------------------------------------------- header */
header.site {
    padding: 2rem 0 0;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: .6rem;
    text-decoration: none;
    color: var(--ink);
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: -0.01em;
}
.brand .mark {
    display: grid;
    place-items: center;
    width: 2.1rem;
    height: 2.1rem;
    border-radius: .7rem;
    background: linear-gradient(140deg, var(--sky), var(--azure));
    box-shadow: 0 .35rem 1rem color-mix(in srgb, var(--azure) 35%, transparent);
    font-size: 1.1rem;
}

/* ----------------------------------------------------------------- hero */
.hero { padding: 3.5rem 0 2.5rem; text-align: center; }
.hero .crown {
    display: grid;
    place-items: center;
    width: 5.5rem;
    height: 5.5rem;
    margin: 0 auto 1.75rem;
    border-radius: 50%;
    background: var(--surface);
    box-shadow: 0 1rem 2.5rem color-mix(in srgb, var(--azure) 22%, transparent);
    font-size: 2.4rem;
}
h1 {
    margin: 0 0 .75rem;
    font-size: clamp(2rem, 7vw, 3rem);
    line-height: 1.12;
    letter-spacing: -0.025em;
    font-weight: 800;
}
.hero .lede {
    margin: 0 auto;
    max-width: 34rem;
    font-size: clamp(1.05rem, 2.4vw, 1.2rem);
    color: var(--ink-soft);
}

/* --------------------------------------------------------------- buttons */
.actions {
    display: flex;
    flex-wrap: wrap;
    gap: .75rem;
    justify-content: center;
    margin-top: 2rem;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .8rem 1.4rem;
    border-radius: .85rem;
    text-decoration: none;
    font-weight: 600;
    font-size: .98rem;
    border: 1px solid transparent;
    transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:active { transform: scale(.98); }
.btn--primary {
    background: linear-gradient(140deg, var(--sky), var(--azure));
    color: #fff;
    box-shadow: 0 .5rem 1.4rem color-mix(in srgb, var(--azure) 34%, transparent);
}
.btn--primary:hover { box-shadow: 0 .7rem 1.8rem color-mix(in srgb, var(--azure) 45%, transparent); }
.btn--ghost {
    background: var(--surface);
    color: var(--azure);
    border-color: var(--hairline);
}
.btn--ghost:hover { background: var(--sunken); }

/* ----------------------------------------------------------------- cards */
.grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
    margin: 3rem 0;
}
.card {
    background: var(--surface);
    border: 1px solid var(--hairline);
    border-radius: 1.1rem;
    padding: 1.4rem;
    box-shadow: 0 .4rem 1.4rem color-mix(in srgb, var(--azure) 7%, transparent);
}
.card h3 {
    margin: 0 0 .4rem;
    font-size: 1.02rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: .5rem;
}
.card p { margin: 0; color: var(--ink-soft); font-size: .95rem; }
.card .ico { font-size: 1.15rem; }

/* --------------------------------------------------------------- content */
main.doc { padding: 2.5rem 0 1rem; }
main.doc h1 { text-align: left; font-size: clamp(1.8rem, 5vw, 2.4rem); }
.updated {
    margin: 0 0 2.5rem;
    color: var(--ink-faint);
    font-size: .9rem;
}
main.doc h2 {
    margin: 2.75rem 0 .75rem;
    font-size: 1.28rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    padding-top: 1.5rem;
    border-top: 1px solid var(--hairline);
}
main.doc h2:first-of-type { border-top: 0; padding-top: 0; }
main.doc h3 { margin: 1.75rem 0 .5rem; font-size: 1.05rem; font-weight: 700; }
main.doc p, main.doc li { color: var(--ink-soft); }
main.doc strong { color: var(--ink); font-weight: 650; }
main.doc ul { padding-left: 1.25rem; }
main.doc li { margin: .4rem 0; }
main.doc a { color: var(--azure); }

.note {
    background: var(--sunken);
    border: 1px solid var(--hairline);
    border-left: 3px solid var(--gold);
    border-radius: .7rem;
    padding: 1rem 1.15rem;
    margin: 1.5rem 0;
    font-size: .95rem;
}
.note p { margin: 0; }
.note p + p { margin-top: .6rem; }

table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.25rem 0;
    font-size: .93rem;
    display: block;
    overflow-x: auto;
}
th, td {
    text-align: left;
    padding: .65rem .8rem;
    border-bottom: 1px solid var(--hairline);
    vertical-align: top;
}
th { color: var(--ink); font-weight: 650; white-space: nowrap; }
td { color: var(--ink-soft); }

.faq { margin: 1.5rem 0; }
details {
    background: var(--surface);
    border: 1px solid var(--hairline);
    border-radius: .9rem;
    padding: 0 1.15rem;
    margin-bottom: .7rem;
}
summary {
    cursor: pointer;
    padding: 1rem 0;
    font-weight: 650;
    color: var(--ink);
    list-style: none;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: center;
}
summary::-webkit-details-marker { display: none; }
summary::after {
    content: "+";
    color: var(--azure);
    font-weight: 700;
    font-size: 1.2rem;
    line-height: 1;
}
details[open] summary::after { content: "\2212"; }
details > :not(summary) { margin-top: 0; padding-bottom: 1rem; }
details p { margin: 0 0 .7rem; }
details p:last-child { margin-bottom: 0; }

.contact {
    background: var(--surface);
    border: 1px solid var(--hairline);
    border-radius: 1.1rem;
    padding: 1.6rem;
    text-align: center;
    margin: 2.5rem 0;
}
.contact .mail {
    display: inline-block;
    margin: .5rem 0 1rem;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--azure);
    text-decoration: none;
    word-break: break-all;
}

/* ---------------------------------------------------------------- footer */
footer.site {
    margin-top: 4rem;
    padding: 2rem 0 2.5rem;
    border-top: 1px solid var(--hairline);
    color: var(--ink-faint);
    font-size: .88rem;
}
footer.site nav {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    margin-bottom: .9rem;
}
footer.site a { color: var(--ink-soft); text-decoration: none; }
footer.site a:hover { color: var(--azure); }

@media (max-width: 30rem) {
    .actions .btn { width: 100%; justify-content: center; }
}