:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --ink: #0e1220;
  --ink-2: #4b5367;
  --line: #e2e5ee;
  --accent: #4f5bff;        /* fills; white text on it */
  --accent-ink: #3a45d6;    /* accent as text on light: 6.4:1 on --bg */
  --mint: #1fd1a5;          /* fills only */
  --mint-ink: #0a7a5e;      /* mint as text on light */
  --dark: #0b0e19;
  --dark-2: #141a2c;
  --dark-line: #262e47;
  --dark-ink: #eef0f7;
  --dark-ink-2: #a3a9bd;
  --logo-bg: #0b0e19;
  --radius: 14px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0d17; --surface: #111627; --ink: #eceef6; --ink-2: #9ea5ba; --line: #222a3f;
    --accent-ink: #9aa2ff; --mint-ink: #3ee0b6; --dark: #060810; --dark-2: #10152a; --logo-bg: #4f5bff;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.6 var(--font); -webkit-font-smoothing: antialiased; }
img, svg { max-width: 100%; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent-ink); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { line-height: 1.12; letter-spacing: -0.025em; margin: 0 0 .5em; font-weight: 750; }
h1 { font-size: clamp(2.3rem, 5.6vw, 4.1rem); line-height: 1.03; letter-spacing: -0.035em; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
h3 { font-size: 1.15rem; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
.muted { color: var(--ink-2); }
.wrap { width: min(1160px, 100% - 32px); margin-inline: auto; }
.narrow { max-width: 760px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 10; background: var(--surface); padding: 8px 12px; }
.grad { background: linear-gradient(92deg, var(--accent) 0%, #8b5cf6 45%, var(--mint) 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* header */
.masthead { border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px); position: sticky; top: 0; z-index: 5; }
.masthead-row { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 16px; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.12rem; letter-spacing: -0.02em; text-decoration: none; color: var(--ink); }
.logo:hover { color: var(--ink); }
.nav { display: flex; align-items: center; gap: 28px; }
.nav a { text-decoration: none; font-weight: 550; font-size: .98rem; }
.nav a[aria-current="page"]:not(.btn) { color: var(--accent-ink); }
.nav-toggle { display: none; font: inherit; font-weight: 600; background: none; border: 1px solid var(--line); color: var(--ink); border-radius: 8px; padding: 6px 12px; }
@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .nav { display: none; position: absolute; inset: 68px 0 auto; flex-direction: column; align-items: stretch; gap: 0; background: var(--bg); border-bottom: 1px solid var(--line); padding: 8px 16px 16px; }
  .nav.open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav .btn { margin-top: 12px; text-align: center; border-bottom: 0; }
}

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; background: var(--accent); color: #fff; font-weight: 650; text-decoration: none; padding: 14px 22px; border-radius: 10px; border: 0; font-size: 1rem; cursor: pointer; font-family: inherit; box-shadow: 0 8px 24px -10px rgba(79,91,255,.7); transition: transform .15s, box-shadow .15s; }
.btn:hover { color: #fff; transform: translateY(-1px); box-shadow: 0 12px 28px -10px rgba(79,91,255,.85); }
.btn-small { padding: 9px 16px; font-size: .95rem; }
.btn-ghost { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 1.5px var(--line); }
.btn-ghost:hover { color: var(--ink); background: var(--surface); box-shadow: inset 0 0 0 1.5px var(--ink-2); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

/* sections */
section { padding: clamp(60px, 8vw, 104px) 0; }
.eyebrow { font: 600 .8rem/1.4 var(--mono); letter-spacing: .04em; color: var(--accent-ink); margin-bottom: 14px; }
.eyebrow::before { content: "// "; opacity: .6; }
.lede { font-size: clamp(1.1rem, 1.6vw, 1.25rem); color: var(--ink-2); max-width: 660px; }
.section-head { max-width: 720px; margin-bottom: 40px; }
.page-head { padding-bottom: 28px; }
.page-head + section { padding-top: 28px; }

/* hero */
.hero { position: relative; overflow: hidden; padding-top: clamp(56px, 9vw, 112px); }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -1;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 44px 44px; mask-image: radial-gradient(ellipse 70% 60% at 70% 30%, #000 20%, transparent 75%); -webkit-mask-image: radial-gradient(ellipse 70% 60% at 70% 30%, #000 20%, transparent 75%); opacity: .7; }
.hero::after { content: ""; position: absolute; z-index: -1; width: 620px; height: 620px; right: -160px; top: -200px; border-radius: 50%;
  background: radial-gradient(circle, rgba(79,91,255,.22), rgba(31,209,165,.08) 50%, transparent 70%); }
.hero-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center; }
@media (max-width: 940px) { .hero-grid { grid-template-columns: 1fr; } }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 30px; color: var(--ink-2); font-size: .92rem; }
.hero-meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero-meta span::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--mint); }

/* code window */
.code { background: var(--dark); color: var(--dark-ink); border: 1px solid var(--dark-line); border-radius: 16px; box-shadow: 0 40px 80px -40px rgba(11,14,25,.55), 0 0 0 1px rgba(255,255,255,.03) inset; overflow: hidden; min-width: 0; }
.code-bar { display: flex; align-items: center; gap: 7px; padding: 12px 16px; border-bottom: 1px solid var(--dark-line); background: var(--dark-2); }
.code-bar i { width: 11px; height: 11px; border-radius: 50%; background: #3a4360; }
.code-bar i:nth-child(1) { background: #ff5f57; } .code-bar i:nth-child(2) { background: #febc2e; } .code-bar i:nth-child(3) { background: #28c840; }
.code-bar span { margin-left: 10px; font: .8rem var(--mono); color: var(--dark-ink-2); }
.code pre { margin: 0; padding: 20px 22px 24px; font: .86rem/1.75 var(--mono); overflow-x: auto; }
.code .k { color: #9aa2ff; } .code .s { color: #6ee7c4; } .code .c { color: #66708c; } .code .n { color: #fbbf72; } .code .p { color: #c4b5fd; }

/* grids & cards */
.grid { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-2 { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr)); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; transition: border-color .2s, transform .2s; }
a.card { text-decoration: none; display: block; }
a.card:hover { color: inherit; border-color: var(--accent); transform: translateY(-2px); }
.card h3 { margin-bottom: .4em; }
.card p:last-child, .card ul:last-child { margin-bottom: 0; }
.card .tag { font: 600 .76rem var(--mono); color: var(--accent-ink); letter-spacing: .04em; margin-bottom: 10px; display: block; }
.icon { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 18px; background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent-ink); }
.icon.mint { background: color-mix(in srgb, var(--mint) 16%, transparent); color: var(--mint-ink); }
.icon svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* practice cards (software / games) */
.practice { position: relative; overflow: hidden; padding: 36px; }
.practice h3 { font-size: 1.6rem; letter-spacing: -0.025em; }
.practice .ticks { margin-top: 18px; }
.practice .more { font-weight: 650; color: var(--accent-ink); }
.practice.games .more { color: var(--mint-ink); }
.practice::after { content: ""; position: absolute; right: -60px; top: -60px; width: 200px; height: 200px; border-radius: 50%; background: radial-gradient(circle, color-mix(in srgb, var(--accent) 18%, transparent), transparent 70%); }
.practice.games::after { background: radial-gradient(circle, color-mix(in srgb, var(--mint) 22%, transparent), transparent 70%); }

.ticks { list-style: none; padding: 0; margin: 0 0 1em; }
.ticks li { padding-left: 28px; position: relative; margin: 8px 0; }
.ticks li::before { content: ""; position: absolute; left: 3px; top: .5em; width: 12px; height: 7px; border-left: 2.5px solid var(--mint-ink); border-bottom: 2.5px solid var(--mint-ink); transform: rotate(-45deg); }
.split { display: grid; grid-template-columns: 1fr 1.4fr; gap: 56px; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; gap: 24px; } }

/* chips */
.chips { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; padding: 0; margin: 0; }
.chips li { font: 500 .88rem var(--mono); padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); }
.stack-group { margin-bottom: 26px; }
.stack-group h3 { font: 600 .8rem var(--mono); color: var(--ink-2); letter-spacing: .06em; text-transform: uppercase; margin-bottom: 12px; }

/* dark band */
.band { background: var(--dark); color: var(--dark-ink); position: relative; }
.band .eyebrow { color: #9aa2ff; }
.band .muted, .band .lede { color: var(--dark-ink-2); }
.band .card { background: var(--dark-2); border-color: var(--dark-line); }
.band a:hover { color: var(--mint); }
.band .btn:hover { color: #fff; }
.band .btn-ghost { color: var(--dark-ink); box-shadow: inset 0 0 0 1.5px var(--dark-line); }
.band .btn-ghost:hover { background: var(--dark-2); box-shadow: inset 0 0 0 1.5px var(--dark-ink-2); }
.band .icon { background: rgba(79,91,255,.18); color: #b4baff; }
.band .icon.mint { background: rgba(31,209,165,.15); color: #6ee7c4; }
.band .ticks li::before { border-color: var(--mint); }
.band .chips li { background: var(--dark-2); border-color: var(--dark-line); }

/* steps */
.steps { list-style: none; margin: 0; padding: 0; counter-reset: s; display: grid; gap: 0; }
.steps > li { counter-increment: s; display: grid; grid-template-columns: 72px 1fr; gap: 16px; padding: 26px 0; border-top: 1px solid var(--line); }
.band .steps > li { border-color: var(--dark-line); }
.steps > li::before { content: counter(s, decimal-leading-zero); font: 600 1.5rem/1.1 var(--mono); color: var(--accent-ink); }
.band .steps > li::before { color: var(--mint); }
.steps h3 { margin-bottom: .3em; }
.steps p { margin: 0; }
.steps .when { font: 500 .8rem var(--mono); color: var(--ink-2); margin-left: 8px; font-weight: 500; letter-spacing: 0; }
.band .steps .when { color: var(--dark-ink-2); }
.steps-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 0 28px; }
.steps-row > li { grid-template-columns: 1fr; gap: 10px; }

/* engagement models */
.models { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.model .price { font: 600 .82rem var(--mono); color: var(--mint-ink); margin-bottom: 8px; }
.model.featured { border-color: var(--accent); box-shadow: 0 20px 50px -30px rgba(79,91,255,.6); }

/* faq */
details { border-top: 1px solid var(--line); padding: 18px 0; }
details:last-of-type { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; font-weight: 650; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font: 1.4rem/1 var(--mono); color: var(--accent-ink); }
details[open] summary::after { content: "−"; }
details p { margin: 12px 0 0; color: var(--ink-2); }

/* cta */
.cta { text-align: center; overflow: hidden; }
.cta::before { content: ""; position: absolute; inset: auto 0 -260px; margin: auto; width: 760px; max-width: 100%; height: 420px; border-radius: 50%; background: radial-gradient(circle, rgba(79,91,255,.35), rgba(31,209,165,.12) 45%, transparent 70%); pointer-events: none; }
.cta .wrap { position: relative; }
.cta .lede { margin-inline: auto; }
.cta .actions { justify-content: center; }

/* prose (legal pages) */
.prose h2 { font-size: 1.45rem; margin-top: 1.8em; }
.prose ul { padding-left: 1.2em; }
.prose li { margin: 6px 0; }

/* table */
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 700; }

/* form */
.form { display: grid; gap: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }
label { font-weight: 600; font-size: .95rem; display: block; margin-bottom: 6px; }
input, select, textarea { width: 100%; font: inherit; color: var(--ink); background: var(--bg); border: 1.5px solid var(--line); border-radius: 10px; padding: 12px 14px; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent); }
textarea { min-height: 140px; resize: vertical; }
.hint { font-size: .85rem; color: var(--ink-2); }
.form-status { font-weight: 600; min-height: 1.5em; margin: 0; }
.hp { display: none; }

/* footer */
.footer { border-top: 1px solid var(--line); padding: 56px 0 24px; font-size: .95rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1.2fr 1fr 1fr; gap: 32px; }
@media (max-width: 860px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-grid > :first-child { grid-column: 1 / -1; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-name { font-weight: 800; }
.footer-head { font: 600 .78rem var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--ink-2); }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin: 6px 0; }
.footer-links a { text-decoration: none; }
.footer address { font-style: normal; color: var(--ink-2); }
.footer-base { border-top: 1px solid var(--line); margin-top: 40px; padding-top: 20px; font-size: .82rem; color: var(--ink-2); }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }