/* Unfold — Just Unmarkable Poker
   Palette: black / dark grey / dark purple / silver */

:root {
    --black: #07070a;
    --ink: #0d0d12;
    --grey-900: #131318;
    --grey-800: #1a1a21;
    --grey-700: #24242d;
    --grey-600: #33333e;
    --purple-950: #150a22;
    --purple-900: #1f0f33;
    --purple-800: #2d1650;
    --purple-700: #43206f;
    --purple-500: #7a45c2;
    --purple-400: #9d6ee0;
    --silver-100: #f1f1f4;
    --silver-200: #d9d9e0;
    --silver-300: #b9b9c4;
    --silver-400: #8d8d9a;
    --silver-500: #666673;

    --radius: 14px;
    --radius-sm: 8px;
    --maxw: 1080px;
    --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-display: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
    --silver-gradient: linear-gradient(135deg, #fafafc 0%, #bfbfca 40%, #8a8a97 60%, #e4e4ea 100%);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 88px;
}

body {
    margin: 0;
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.7;
    color: var(--silver-200);
    background-color: var(--black);
    background-image:
        radial-gradient(ellipse 80% 50% at 50% -10%, rgba(122, 69, 194, 0.28), transparent 70%),
        radial-gradient(ellipse 60% 40% at 100% 100%, rgba(67, 32, 111, 0.25), transparent 70%),
        linear-gradient(180deg, var(--ink) 0%, var(--black) 100%);
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

/* faint suit pattern over the whole page */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -1;
    opacity: 0.035;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120' viewBox='0 0 120 120'%3E%3Cg fill='%23ffffff' font-family='serif' font-size='22'%3E%3Ctext x='10' y='34'%3E%E2%99%A0%3C/text%3E%3Ctext x='70' y='34'%3E%E2%99%A5%3C/text%3E%3Ctext x='40' y='94'%3E%E2%99%A6%3C/text%3E%3Ctext x='100' y='94'%3E%E2%99%A3%3C/text%3E%3C/g%3E%3C/svg%3E");
}

a {
    color: var(--purple-400);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--silver-100);
}

:focus-visible {
    outline: 2px solid var(--purple-400);
    outline-offset: 3px;
    border-radius: 4px;
}

h1,
h2,
h3 {
    color: var(--silver-100);
    line-height: 1.25;
    margin: 0 0 0.6em;
}

h1,
h2 {
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: 0.01em;
}

p {
    margin: 0 0 1em;
}

strong {
    color: var(--silver-100);
}

.container {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 1.25rem;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0.5rem;
    background: var(--purple-700);
    color: var(--silver-100);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    z-index: 100;
}

.skip-link:focus {
    left: 0.5rem;
}

/* ---------- Header / nav ---------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(7, 7, 10, 0.72);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(185, 185, 196, 0.08);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    height: 68px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    color: var(--silver-100);
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
}

.brand img {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    box-shadow: 0 0 0 1px rgba(217, 217, 224, 0.25), 0 0 18px rgba(122, 69, 194, 0.45);
}

.brand:hover {
    color: var(--silver-100);
}

.nav {
    display: flex;
    gap: 0.25rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav a {
    display: block;
    padding: 0.45rem 0.85rem;
    border-radius: 999px;
    color: var(--silver-300);
    font-size: 0.93rem;
}

.nav a:hover {
    color: var(--silver-100);
    background: rgba(122, 69, 194, 0.15);
}

.nav a[aria-current="page"] {
    color: var(--silver-100);
    background: rgba(122, 69, 194, 0.25);
    box-shadow: inset 0 0 0 1px rgba(157, 110, 224, 0.35);
}

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

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--silver-200);
    background: rgba(67, 32, 111, 0.45);
    border: 1px solid rgba(157, 110, 224, 0.4);
}

.badge::before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--purple-400);
    box-shadow: 0 0 8px var(--purple-400);
}

.badge.plain::before {
    display: none;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.4rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.97rem;
    transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn-primary {
    color: var(--black);
    background: var(--silver-gradient);
    box-shadow: 0 6px 24px rgba(217, 217, 224, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.btn-primary:hover {
    color: var(--black);
    box-shadow: 0 8px 30px rgba(217, 217, 224, 0.22), inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.btn-ghost {
    color: var(--silver-100);
    background: rgba(45, 22, 80, 0.4);
    box-shadow: inset 0 0 0 1px rgba(157, 110, 224, 0.45);
}

.btn-ghost:hover {
    color: var(--silver-100);
    background: rgba(67, 32, 111, 0.6);
}

.btn-play {
    gap: 0.75rem;
    padding: 0.55rem 1.4rem 0.55rem 1.1rem;
    border-radius: 12px;
    color: var(--silver-100);
    background: linear-gradient(180deg, #16161c, var(--black));
    box-shadow: inset 0 0 0 1px rgba(217, 217, 224, 0.4), 0 8px 26px rgba(0, 0, 0, 0.55);
    line-height: 1.1;
    text-align: left;
}

.btn-play:hover {
    color: var(--silver-100);
    box-shadow: inset 0 0 0 1px rgba(217, 217, 224, 0.7), 0 8px 30px rgba(122, 69, 194, 0.35);
}

.btn-play svg {
    width: 26px;
    height: 28px;
    flex-shrink: 0;
}

.btn-play small {
    display: block;
    font-size: 0.66rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--silver-300);
}

.btn-play span {
    display: block;
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: 0.01em;
}

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

.page-hero {
    padding: 4rem 0 2.5rem;
    text-align: center;
}

.page-hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    margin: 1rem 0 0.5rem;
}

.page-hero p {
    color: var(--silver-400);
    max-width: 620px;
    margin: 0 auto;
}

.silver-text {
    background: var(--silver-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
    color: var(--silver-500);
    font-size: 0.9rem;
    margin: 1.5rem auto 0;
    letter-spacing: 0.4em;
}

.divider::before,
.divider::after {
    content: "";
    height: 1px;
    width: 70px;
    background: linear-gradient(90deg, transparent, var(--silver-500));
}

.divider::after {
    background: linear-gradient(90deg, var(--silver-500), transparent);
}

/* ---------- Cards ---------- */

.card {
    position: relative;
    background: linear-gradient(180deg, rgba(31, 15, 51, 0.55) 0%, rgba(19, 19, 24, 0.85) 60%);
    border: 1px solid rgba(185, 185, 196, 0.1);
    border-radius: var(--radius);
    padding: 1.75rem;
    box-shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.7);
}

.card::before {
    /* silver hairline on top edge */
    content: "";
    position: absolute;
    top: 0;
    left: 1.5rem;
    right: 1.5rem;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(217, 217, 224, 0.45), transparent);
}

.card h2 {
    font-size: 1.4rem;
}

.card h3 {
    font-size: 1.05rem;
    margin-bottom: 0.4em;
}

.card ul {
    margin: 0 0 1em;
    padding: 0;
    list-style: none;
}

.card li {
    position: relative;
    padding-left: 1.6rem;
    margin-bottom: 0.55rem;
}

.card li::before {
    content: "\2660";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--purple-400);
    font-size: 0.85em;
}

.card > :last-child {
    margin-bottom: 0;
}

/* ---------- Home ---------- */

.hero {
    padding: 5rem 0 4rem;
}

.hero .container {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 3rem;
}

.hero h1 {
    font-size: clamp(2.4rem, 6vw, 4rem);
    margin: 1.2rem 0 0.3rem;
}

.hero .tagline {
    font-family: var(--font-display);
    font-size: clamp(1.2rem, 2.5vw, 1.55rem);
    color: var(--silver-300);
    margin-bottom: 1.2rem;
}

.hero .lead {
    font-size: 1.08rem;
    color: var(--silver-400);
    max-width: 520px;
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.hero-art {
    position: relative;
    display: grid;
    place-items: center;
}

.hero-art::before {
    content: "";
    position: absolute;
    width: 115%;
    aspect-ratio: 1;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(122, 69, 194, 0.35) 0%, rgba(45, 22, 80, 0.15) 45%, transparent 70%);
    filter: blur(10px);
}

.hero-art::after {
    content: "";
    position: absolute;
    width: 102%;
    aspect-ratio: 1;
    border-radius: 50%;
    border: 1px dashed rgba(185, 185, 196, 0.18);
    animation: spin 90s linear infinite;
}

.hero-art img {
    position: relative;
    width: 100%;
    max-width: 380px;
    height: auto;
    border-radius: 50%;
    filter: drop-shadow(0 25px 50px rgba(0, 0, 0, 0.7));
    animation: float 7s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.section {
    padding: 3.5rem 0;
}

.section-head {
    text-align: center;
    margin-bottom: 2.5rem;
}

.section-head h2 {
    font-size: clamp(1.7rem, 4vw, 2.3rem);
}

.section-head p {
    color: var(--silver-400);
    max-width: 600px;
    margin: 0 auto;
}

.grid {
    display: grid;
    gap: 1.25rem;
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

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

.feature {
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature:hover {
    transform: translateY(-3px);
    border-color: rgba(157, 110, 224, 0.35);
}

.feature .suit {
    display: grid;
    place-items: center;
    width: 46px;
    height: 46px;
    border-radius: 12px;
    margin-bottom: 1rem;
    font-size: 1.4rem;
    color: var(--silver-100);
    background: linear-gradient(135deg, var(--purple-700), var(--purple-900));
    box-shadow: inset 0 0 0 1px rgba(217, 217, 224, 0.18);
}

.feature p {
    color: var(--silver-400);
    font-size: 0.96rem;
    margin: 0;
}

.steps {
    counter-reset: step;
}

.step {
    padding-top: 2.4rem;
}

.step::after {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    top: -18px;
    left: 1.75rem;
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--black);
    background: var(--silver-gradient);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.6);
}

.step p {
    color: var(--silver-400);
    margin: 0;
}

.cta {
    text-align: center;
    padding: 3rem 1.75rem;
    background:
        radial-gradient(ellipse at top, rgba(122, 69, 194, 0.35), transparent 70%),
        linear-gradient(180deg, var(--purple-900), var(--grey-900));
}

.cta h2 {
    font-size: clamp(1.6rem, 4vw, 2.1rem);
}

.cta p {
    color: var(--silver-300);
    max-width: 560px;
    margin: 0 auto 1.6rem;
}

.cta .hero-actions {
    justify-content: center;
}

/* ---------- Document pages (privacy / release notes) ---------- */

.doc-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 2rem;
    align-items: start;
    padding-bottom: 4rem;
}

.toc {
    position: sticky;
    top: 96px;
    padding: 1.25rem;
}

.toc h2 {
    font-family: var(--font);
    font-size: 0.75rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--silver-500);
    margin-bottom: 0.8rem;
}

.toc ol {
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: toc;
}

.toc li {
    counter-increment: toc;
    padding: 0;
    margin: 0;
}

.toc li::before {
    display: none;
}

.toc a {
    display: flex;
    gap: 0.6rem;
    padding: 0.32rem 0.5rem;
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--silver-400);
}

.toc a::before {
    content: counter(toc, decimal-leading-zero);
    color: var(--silver-500);
    font-variant-numeric: tabular-nums;
}

.toc a:hover {
    color: var(--silver-100);
    background: rgba(122, 69, 194, 0.15);
}

.doc {
    display: grid;
    gap: 1.25rem;
    min-width: 0;
}

.doc .card h2 {
    display: flex;
    align-items: baseline;
    gap: 0.7rem;
}

.doc .card h2 .num {
    font-family: var(--font);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--purple-400);
    letter-spacing: 0.08em;
}

.doc .card p,
.doc .card li {
    color: var(--silver-300);
}

.meta-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.6rem;
    margin-top: 1.4rem;
}

.summary {
    border-color: rgba(157, 110, 224, 0.35);
    background: linear-gradient(135deg, rgba(67, 32, 111, 0.55), rgba(19, 19, 24, 0.9));
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.4rem 1.5rem;
}

.check,
.cross {
    padding-left: 1.6rem;
    position: relative;
}

.card li.check::before {
    content: "\2713";
    color: var(--silver-100);
}

.card li.cross::before {
    content: "\2715";
    color: var(--silver-500);
}

.table-wrap {
    overflow-x: auto;
    margin: 0 0 1em;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(185, 185, 196, 0.12);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.94rem;
}

th,
td {
    text-align: left;
    padding: 0.75rem 1rem;
    vertical-align: top;
    border-bottom: 1px solid rgba(185, 185, 196, 0.08);
}

th {
    color: var(--silver-100);
    background: rgba(45, 22, 80, 0.5);
    font-weight: 600;
    font-size: 0.82rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

td {
    color: var(--silver-300);
}

tr:last-child td {
    border-bottom: 0;
}

.callout {
    padding: 1rem 1.2rem;
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--purple-400);
    background: rgba(45, 22, 80, 0.35);
    color: var(--silver-300);
}

/* ---------- Release notes ---------- */

.timeline {
    position: relative;
    display: grid;
    gap: 2rem;
    padding-left: 2.2rem;
    padding-bottom: 4rem;
    max-width: 820px;
    margin: 0 auto;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 9px;
    top: 0.5rem;
    bottom: 4rem;
    width: 2px;
    background: linear-gradient(180deg, var(--purple-400), rgba(122, 69, 194, 0.1));
}

.release {
    position: relative;
}

.release > .dot {
    position: absolute;
    left: calc(-2.2rem + 1px);
    top: 2rem;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--silver-gradient);
    box-shadow: 0 0 0 4px var(--black), 0 0 18px rgba(157, 110, 224, 0.7);
}

.release-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.6rem 1rem;
    margin-bottom: 1rem;
}

.release-head h2 {
    margin: 0;
    font-size: 1.7rem;
}

.release-block {
    margin-top: 1.6rem;
}

.release-block h3 {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.8rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--silver-400);
    margin-bottom: 0.9rem;
}

.release-block h3::after {
    content: "";
    flex: 1;
    height: 1px;
    background: rgba(185, 185, 196, 0.12);
}

.release-block li {
    color: var(--silver-300);
}

.tag {
    display: inline-block;
    padding: 0.05rem 0.5rem;
    margin-right: 0.35rem;
    border-radius: 5px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    vertical-align: 0.12em;
}

.tag-new {
    color: var(--silver-100);
    background: var(--purple-700);
}

.tag-tech {
    color: var(--silver-200);
    background: var(--grey-600);
}

.tag-known {
    color: var(--black);
    background: var(--silver-300);
}

.release.upcoming .card {
    background: rgba(19, 19, 24, 0.6);
    border-style: dashed;
}

.release.upcoming > .dot {
    background: var(--grey-700);
    box-shadow: 0 0 0 4px var(--black), inset 0 0 0 2px var(--silver-500);
}

/* ---------- Footer ---------- */

.site-footer {
    margin-top: auto;
    border-top: 1px solid rgba(185, 185, 196, 0.08);
    background: rgba(7, 7, 10, 0.85);
    padding: 2rem 0;
    font-size: 0.9rem;
    color: var(--silver-500);
}

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

.site-footer nav {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
}

.site-footer a {
    color: var(--silver-400);
}

.site-footer a:hover {
    color: var(--silver-100);
}

.suits {
    letter-spacing: 0.35em;
    color: var(--silver-500);
}

.suits .red {
    color: var(--purple-400);
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero .lead {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-art {
        order: -1;
    }

    .hero-art img {
        max-width: 240px;
    }

    .grid-3 {
        grid-template-columns: 1fr 1fr;
    }

    .doc-layout {
        grid-template-columns: 1fr;
    }

    .toc {
        position: static;
    }
}

@media (max-width: 640px) {
    .site-header .container {
        height: auto;
        padding-top: 0.7rem;
        padding-bottom: 0.7rem;
        flex-direction: column;
        gap: 0.5rem;
    }

    html {
        scroll-padding-top: 130px;
    }

    .nav a {
        padding: 0.35rem 0.7rem;
        font-size: 0.88rem;
    }

    .hero {
        padding: 3rem 0 2.5rem;
    }

    .grid-3,
    .grid-2,
    .summary-grid {
        grid-template-columns: 1fr;
    }

    .card {
        padding: 1.4rem;
    }

    .step::after {
        left: 1.4rem;
    }

    .site-footer .container {
        flex-direction: column;
        text-align: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation: none !important;
        transition: none !important;
    }

    html {
        scroll-behavior: auto;
    }
}