/* Design tokens and shared components */
:root {
  --bg: #050505;
  --surface: #101013;
  --surface-2: #16161B;
  --surface-3: #1D1D24;
  --border: #2B2B32;
  --border-strong: #3C3C46;
  --text: #F2F2EE;
  --muted: #A4A4AD;
  --faint: #6E6E78;
  --accent: #3157FF;
  --accent-hi: #5576FF;
  --accent-ink: #FFFFFF;
  --violet: #7A62E8;
  --ok: #3FCB84;
  --warn: #F0B54A;
  --err: #FF5A5F;
  --font-head: "Chakra Petch", "Archivo", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "Helvetica Neue", Arial, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --grid: 16px;
  --ease: cubic-bezier(.2, .7, .1, 1);
  color-scheme: dark;
}
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; min-height: 100vh; background-color: var(--bg); color: var(--text);
  font: 15px/1.55 var(--font-body);
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: var(--grid) var(--grid), var(--grid) var(--grid), calc(var(--grid) * 8) calc(var(--grid) * 8), calc(var(--grid) * 8) calc(var(--grid) * 8);
  background-attachment: fixed;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--text); text-underline-offset: 3px; text-decoration-color: var(--border-strong); }
a:hover { text-decoration-color: var(--accent); }
h1, h2, h3, h4 { font-family: var(--font-head); text-transform: uppercase; letter-spacing: .02em; line-height: 1.02; margin: 0 0 .5em; font-weight: 600; }
p { margin: 0 0 1em; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
::selection { background: var(--accent); color: #fff; }
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: 8px; top: -60px; z-index: 100; background: var(--accent); color: #fff; padding: 8px 12px; }
.skip:focus { top: 8px; }

.mono, .label { font-family: var(--font-mono); }
.label { font-size: 11px; text-transform: uppercase; letter-spacing: .12em; color: var(--muted); }
.idx { font-family: var(--font-mono); font-size: 11px; color: var(--accent); letter-spacing: .08em; }
.muted { color: var(--muted); }
.faint { color: var(--faint); }
.accent { color: var(--accent); }
.small { font-size: 13px; }
.tiny { font-size: 11.5px; }

/* buttons */
.btn {
  --b: var(--border-strong);
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 44px; padding: 0 18px; border: 1px solid var(--b); background: transparent; color: var(--text);
  font: 600 12.5px/1 var(--font-mono); letter-spacing: .12em; text-transform: uppercase; text-decoration: none;
  cursor: pointer; border-radius: 0; transition: background .2s var(--ease), border-color .2s var(--ease), color .2s;
  position: relative; white-space: nowrap;
}
.btn:hover { border-color: var(--text); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { background: var(--accent-hi); border-color: var(--accent-hi); }
.btn.ghost { border-color: transparent; }
.btn.ghost:hover { border-color: var(--border-strong); }
.btn.small { min-height: 34px; padding: 0 12px; font-size: 11px; }
.btn.block { width: 100%; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: .45; cursor: not-allowed; }
.btn .arrow { transition: transform .25s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }
.btn.danger { --b: rgba(255,90,95,.5); color: #ffb3b5; }

/* form controls */
.field { display: grid; gap: 6px; margin-bottom: 14px; }
.field > label, .field > .label { font: 500 11px var(--font-mono); text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=search], select, textarea {
  width: 100%; min-height: 44px; padding: 10px 12px; background: var(--bg); color: var(--text);
  border: 1px solid var(--border-strong); border-radius: 0; font: 15px var(--font-body);
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 1px var(--accent); }
input[aria-invalid="true"] { border-color: var(--err); }
textarea { min-height: 90px; resize: vertical; }
select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%); background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 36px; }
input[type=range] { width: 100%; accent-color: var(--accent); }
input[type=checkbox], input[type=radio] { accent-color: var(--accent); width: 18px; height: 18px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; }

/* chips / option tiles */
.opts { display: grid; gap: 8px; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
.opt {
  position: relative; display: grid; gap: 4px; padding: 12px; min-height: 64px; background: var(--surface); border: 1px solid var(--border);
  color: var(--text); text-align: left; cursor: pointer; font: inherit;
}
.opt:hover { border-color: var(--border-strong); }
.opt[aria-pressed="true"], .opt[aria-checked="true"] { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.opt .t { font: 600 13px var(--font-head); text-transform: uppercase; letter-spacing: .04em; }
.opt .s { font: 11px var(--font-mono); color: var(--muted); }
.opt .price { position: absolute; top: 10px; right: 10px; font: 11px var(--font-mono); color: var(--muted); }
.opt[disabled] { opacity: .4; cursor: not-allowed; }
.swatches { display: flex; flex-wrap: wrap; gap: 8px; }
.swatch {
  width: 36px; height: 36px; border: 1px solid var(--border-strong); cursor: pointer; padding: 0; position: relative; background: var(--c);
}
.swatch[aria-checked="true"] { outline: 1px solid var(--accent); outline-offset: 3px; }
.swatch[data-stock="low"]::after { content: ""; position: absolute; right: -3px; top: -3px; width: 7px; height: 7px; background: var(--warn); }
.swatch[data-stock="out"] { cursor: not-allowed; opacity: .35; }
.swatch[data-stock="out"]::before { content: ""; position: absolute; inset: 0; background: linear-gradient(135deg, transparent 47%, var(--err) 47%, var(--err) 53%, transparent 53%); }

/* panels */
.panel { background: var(--surface); border: 1px solid var(--border); }
.panel-pad { padding: 20px; }
.rule { height: 1px; background: var(--border); border: 0; margin: 20px 0; }
.tag { display: inline-flex; align-items: center; gap: 6px; padding: 3px 7px; border: 1px solid var(--border-strong); font: 10.5px var(--font-mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.tag.demo { border-color: rgba(240,181,74,.5); color: var(--warn); }
.tag.ok { border-color: rgba(63,203,132,.5); color: var(--ok); }
.tag.err { border-color: rgba(255,90,95,.5); color: var(--err); }
.tag.accent { border-color: var(--accent); color: #9fb1ff; }
.notice { padding: 12px 14px; border: 1px solid var(--border-strong); border-left: 2px solid var(--accent); background: var(--surface); font-size: 13.5px; }
.notice.warn { border-left-color: var(--warn); }
.notice.err { border-left-color: var(--err); }
.notice.ok { border-left-color: var(--ok); }
.issues { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.issues li { font-size: 13px; padding: 8px 10px; border: 1px solid var(--border); border-left: 2px solid var(--warn); background: rgba(240,181,74,.04); }
.issues li.error { border-left-color: var(--err); background: rgba(255,90,95,.05); }
table.data { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.data th, table.data td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
table.data th { font: 500 10.5px var(--font-mono); text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }
table.data td.num { font-family: var(--font-mono); white-space: nowrap; }

/* top bar */
.demo-bar { display: flex; flex-wrap: wrap; gap: 6px 16px; align-items: center; justify-content: center; padding: 7px 16px; background: #15120A; border-bottom: 1px solid rgba(240,181,74,.25); color: #E9C77F; font: 11px var(--font-mono); letter-spacing: .06em; text-transform: uppercase; text-align: center; }
.demo-bar a { color: inherit; }
.site-head { position: sticky; top: 0; z-index: 40; display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 60px; padding: 0 24px; background: rgba(5,5,5,.82); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.brand { font: 700 15px var(--font-head); letter-spacing: .14em; text-decoration: none; text-transform: uppercase; display: flex; align-items: center; gap: 10px; }
.brand-mark { width: 18px; height: 18px; }
.site-nav { display: flex; gap: 4px; align-items: center; }
.site-nav a { font: 500 11.5px var(--font-mono); text-transform: uppercase; letter-spacing: .12em; text-decoration: none; color: var(--muted); padding: 8px 10px; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--text); }
.cart-count { display: inline-grid; place-items: center; min-width: 18px; height: 18px; padding: 0 4px; background: var(--accent); color: #fff; font-size: 10px; margin-left: 6px; }
@media (max-width: 720px) { .site-nav .hide-sm { display: none; } .site-head { padding: 0 16px; } }

/* modal */
.modal-back { position: fixed; inset: 0; z-index: 90; background: rgba(0,0,0,.72); display: grid; place-items: center; padding: 16px; animation: fade .2s var(--ease); }
.modal { width: min(460px, 100%); max-height: calc(100vh - 32px); overflow: auto; background: var(--surface); border: 1px solid var(--border-strong); padding: 26px; position: relative; }
.modal h2 { font-size: 22px; }
.modal .close { position: absolute; top: 10px; right: 10px; }
.tabs { display: flex; border-bottom: 1px solid var(--border); margin-bottom: 18px; }
.tabs button { flex: 1; background: none; border: 0; border-bottom: 2px solid transparent; color: var(--muted); font: 600 12px var(--font-mono); text-transform: uppercase; letter-spacing: .1em; padding: 12px; cursor: pointer; }
.tabs button[aria-selected="true"] { color: var(--text); border-bottom-color: var(--accent); }
.err-text { color: #ff9a9d; font-size: 13px; min-height: 1em; }

/* toast */
.toasts { position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%); z-index: 95; display: grid; gap: 8px; width: min(460px, calc(100% - 32px)); }
.toast { padding: 12px 14px; background: var(--surface-3); border: 1px solid var(--border-strong); border-left: 2px solid var(--accent); font-size: 14px; animation: rise .25s var(--ease); }
.toast.err { border-left-color: var(--err); }

/* footer */
.site-foot { border-top: 1px solid var(--border); padding: 40px 24px; color: var(--muted); font-size: 13px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; }

@keyframes fade { from { opacity: 0; } }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}

/* segmented control */
.seg { display: flex; flex-wrap: wrap; gap: 0; border: 1px solid var(--border-strong); width: fit-content; }
.seg-btn { background: transparent; color: var(--muted); border: 0; border-right: 1px solid var(--border-strong); padding: 8px 12px; min-height: 36px; font: 500 11px var(--font-mono); text-transform: uppercase; letter-spacing: .08em; cursor: pointer; }
.seg-btn:last-child { border-right: 0; }
.seg-btn[aria-checked="true"], .seg-btn[aria-pressed="true"] { background: var(--text); color: var(--bg); }
.seg-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.opts.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 640px) { .opts.cols-3 { grid-template-columns: 1fr; } }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }