/* ==========================================================
   Gas King Game — "Instrument Panel" design system
   Enamel cream · oxblood · chrome dial rings · needle sweep
   ========================================================== */

:root {
  /* enamel base */
  --enamel: #F3ECDD;
  --enamel-deep: #E8DEC8;
  --dial-face: #FBF8F0;
  /* ink */
  --ink: #221C19;
  --ink-soft: #4A403A;
  --ink-mute: #7A6E64;
  /* oxblood accent */
  --oxblood: #6B1A20;
  --oxblood-bright: #8E2530;
  --oxblood-wash: #F1DEDA;
  /* chrome */
  --chrome-hi: #F4F5F6;
  --chrome: #B9BEC3;
  --chrome-mid: #8D9398;
  --chrome-lo: #585E63;
  /* safe band (dial green zone) */
  --band: #4F6A4B;

  --rule: rgba(34, 28, 25, .18);
  --radius: 10px;
  --shadow: 0 1px 0 rgba(255,255,255,.7) inset, 0 10px 24px -14px rgba(34,28,25,.45);

  --f-display: "Big Shoulders Display", "Arial Narrow", sans-serif;
  --f-body: "Libre Franklin", "Helvetica Neue", Arial, sans-serif;
  --f-num: "Azeret Mono", ui-monospace, Menlo, monospace;

  --wrap: 1180px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--enamel);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 17px;
  line-height: 1.65;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--oxblood); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--oxblood-bright); }
:focus-visible { outline: 3px solid var(--oxblood-bright); outline-offset: 3px; }

h1, h2, h3, h4 {
  font-family: var(--f-display);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: .01em;
  text-transform: uppercase;
  margin: 0 0 .5em;
}
h1 { font-size: clamp(2.6rem, 6.4vw, 5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: 1.55rem; }
p { margin: 0 0 1.1em; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--enamel); padding: 8px 14px; z-index: 50; }
.skip:focus { left: 12px; top: 12px; }

/* ---------- small label (stencil plate) ---------- */
.plate {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--f-num); font-size: .72rem; font-weight: 600;
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 14px;
}
.plate::before {
  content: ""; width: 10px; height: 10px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, var(--chrome-hi), var(--chrome-mid) 60%, var(--chrome-lo));
  box-shadow: 0 0 0 1px rgba(0,0,0,.25);
}

/* ---------- tick-mark graduation divider ---------- */
.ticks {
  height: 26px; border: 0; margin: 0;
  background:
    linear-gradient(var(--ink), var(--ink)) left bottom / 100% 2px no-repeat,
    repeating-linear-gradient(90deg, var(--ink) 0 2px, transparent 2px 60px) left bottom / 100% 22px no-repeat,
    repeating-linear-gradient(90deg, var(--ink) 0 1px, transparent 1px 12px) left bottom / 100% 11px no-repeat;
  opacity: .8;
}
.ticks--red {
  background:
    linear-gradient(var(--ink), var(--ink)) left bottom / 100% 2px no-repeat,
    linear-gradient(var(--oxblood), var(--oxblood)) right bottom / 18% 8px no-repeat,
    repeating-linear-gradient(90deg, var(--ink) 0 2px, transparent 2px 60px) left bottom / 100% 22px no-repeat,
    repeating-linear-gradient(90deg, var(--ink) 0 1px, transparent 1px 12px) left bottom / 100% 11px no-repeat;
}

/* ---------- riveted panel ---------- */
.panel {
  position: relative;
  background: var(--dial-face);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 30px 28px 26px;
  box-shadow: var(--shadow);
  --rv: radial-gradient(circle at 40% 35%, var(--chrome-hi) 0 1.5px, var(--chrome-mid) 3px, var(--chrome-lo) 4px, transparent 4.6px);
  background-image: var(--rv), var(--rv), var(--rv), var(--rv);
  background-size: 10px 10px;
  background-repeat: no-repeat;
  background-position: 9px 9px, calc(100% - 9px) 9px, 9px calc(100% - 9px), calc(100% - 9px) calc(100% - 9px);
}
.panel--dark {
  background-color: var(--ink);
  color: var(--enamel);
  border-color: #000;
}
.panel--ox { background-color: var(--oxblood); color: var(--enamel); border-color: #3e0d12; }
.panel--ox a, .panel--dark a { color: var(--chrome-hi); }

/* ---------- gauge ring (numeral bezel) ---------- */
.gauge {
  --size: 150px;
  --val: 0.35;             /* 0..1, drives needle */
  position: relative;
  width: var(--size); height: var(--size);
  border-radius: 50%;
  flex: none;
  background:
    conic-gradient(from 200deg, var(--chrome-hi), var(--chrome-mid) 20%, var(--chrome-hi) 40%, var(--chrome-lo) 60%, var(--chrome-hi) 80%, var(--chrome-mid));
  box-shadow: 0 8px 18px -10px rgba(0,0,0,.6), 0 0 0 1px rgba(0,0,0,.35);
}
.gauge::before { /* dial face with graduations */
  content: ""; position: absolute; inset: 9%;
  border-radius: 50%;
  background:
    radial-gradient(circle, var(--dial-face) 0 58%, transparent 58.5%),
    conic-gradient(from 225deg, transparent 0 75%, var(--dial-face) 75% 100%),
    repeating-conic-gradient(from 225deg, var(--ink) 0 .9deg, transparent .9deg 13.5deg),
    var(--dial-face);
  box-shadow: inset 0 2px 5px rgba(0,0,0,.35);
}
.gauge::after { /* red zone arc */
  content: ""; position: absolute; inset: 9%;
  border-radius: 50%;
  background: conic-gradient(from 90deg, var(--oxblood) 0 45deg, transparent 45deg);
  -webkit-mask: radial-gradient(circle, transparent 0 62%, #000 62.5% 72%, transparent 72.5%);
          mask: radial-gradient(circle, transparent 0 62%, #000 62.5% 72%, transparent 72.5%);
}
.gauge__needle {
  position: absolute; left: 50%; top: 50%;
  width: 3px; height: 40%;
  margin-left: -1.5px;
  background: var(--oxblood-bright);
  border-radius: 2px 2px 0 0;
  transform-origin: 50% 100%;
  transform: translateY(-100%) rotate(calc(-135deg + var(--val) * 270deg));
  transition: transform 1.1s cubic-bezier(.2, 1.5, .4, 1);
  z-index: 2;
  box-shadow: 0 1px 2px rgba(0,0,0,.35);
}
.gauge__hub {
  position: absolute; left: 50%; top: 50%; width: 14%; height: 14%;
  transform: translate(-50%, -50%);
  border-radius: 50%; z-index: 3;
  background: radial-gradient(circle at 35% 30%, var(--chrome-hi), var(--chrome-lo));
  box-shadow: 0 0 0 1px rgba(0,0,0,.4);
}
.gauge__read {
  position: absolute; left: 0; right: 0; bottom: 22%;
  text-align: center; z-index: 4;
  font-family: var(--f-num); font-weight: 600;
  font-size: calc(var(--size) * .1);
  color: var(--ink); line-height: 1.1;
}
.gauge__read small {
  display: block; font-size: .6em; letter-spacing: .14em; color: var(--ink-mute); text-transform: uppercase;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 0 24px;
  font-family: var(--f-display); font-weight: 800; font-size: 1.15rem;
  letter-spacing: .08em; text-transform: uppercase; text-decoration: none;
  border-radius: 999px; border: 2px solid var(--ink);
  background: var(--oxblood); color: var(--enamel);
  box-shadow: 0 3px 0 var(--ink);
  cursor: pointer;
  transition: transform .12s, box-shadow .12s, background .2s;
}
.btn:hover { background: var(--oxblood-bright); color: var(--enamel); }
.btn:active { transform: translateY(3px); box-shadow: 0 0 0 var(--ink); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--enamel-deep); color: var(--ink); }
.btn[disabled] { opacity: .45; cursor: not-allowed; transform: none; box-shadow: 0 3px 0 var(--ink); }

/* ==========================================================
   Header
   ========================================================== */
.site-head {
  position: sticky; top: 0; z-index: 30;
  background: var(--enamel);
  border-bottom: 2px solid var(--ink);
}
.site-head::after { /* thin chrome trim under header */
  content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 4px;
  background: linear-gradient(180deg, var(--chrome-hi), var(--chrome-mid));
  border-bottom: 1px solid rgba(0,0,0,.2);
}
.site-head__row { display: flex; align-items: center; justify-content: space-between; gap: 20px; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand__mark { width: 42px; height: 42px; }
.brand__name { font-family: var(--f-display); font-weight: 900; font-size: 1.6rem; letter-spacing: .04em; text-transform: uppercase; line-height: 1; }
.brand__name span { color: var(--oxblood); }
.brand__sub { display: block; font-family: var(--f-num); font-size: .6rem; letter-spacing: .2em; color: var(--ink-mute); font-weight: 500; margin-top: 3px; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  font-family: var(--f-display); font-weight: 700; font-size: 1.05rem; letter-spacing: .07em; text-transform: uppercase;
  color: var(--ink); text-decoration: none; padding: 8px 12px; border-radius: 6px;
}
.nav a:hover { background: var(--enamel-deep); }
.nav a[aria-current="page"] { color: var(--oxblood); box-shadow: inset 0 -3px 0 var(--oxblood); border-radius: 0; }
.nav .nav__cta { background: var(--ink); color: var(--enamel); border-radius: 999px; padding: 8px 18px; margin-left: 8px; }
.nav .nav__cta:hover { background: var(--oxblood); color: var(--enamel); }
.nav .nav__cta[aria-current="page"] { box-shadow: none; background: var(--oxblood); color: var(--enamel); border-radius: 999px; }
.age-chip {
  font-family: var(--f-num); font-size: .72rem; font-weight: 700; letter-spacing: .08em;
  border: 2px solid var(--oxblood); color: var(--oxblood); border-radius: 50%;
  width: 40px; height: 40px; display: grid; place-items: center; flex: none;
}

/* mobile nav: a "switch bank" that drops beneath the header */
.nav-toggle {
  display: none;
  align-items: center; gap: 10px;
  background: var(--dial-face); border: 2px solid var(--ink); border-radius: 999px;
  padding: 6px 14px 6px 8px; cursor: pointer;
  font-family: var(--f-display); font-weight: 800; font-size: 1rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink);
}
.nav-toggle__knob {
  width: 28px; height: 16px; border-radius: 999px; background: var(--chrome); position: relative;
  box-shadow: inset 0 1px 3px rgba(0,0,0,.4);
}
.nav-toggle__knob::after {
  content: ""; position: absolute; top: 2px; left: 2px; width: 12px; height: 12px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff, var(--chrome-lo));
  transition: left .2s;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__knob { background: var(--oxblood); }
.nav-toggle[aria-expanded="true"] .nav-toggle__knob::after { left: 14px; }

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .site-head .age-chip { display: none; }
  .nav {
    position: absolute; left: 0; right: 0; top: 100%;
    display: none; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--ink); padding: 14px 20px 22px;
    border-bottom: 4px solid var(--oxblood);
  }
  .nav.is-open { display: flex; }
  .nav a { color: var(--enamel); padding: 14px 4px; border-bottom: 1px solid rgba(243,236,221,.14); font-size: 1.3rem; display: flex; justify-content: space-between; }
  .nav a::after { content: "›"; color: var(--chrome); }
  .nav a:hover { background: transparent; color: var(--chrome-hi); }
  .nav a[aria-current="page"] { color: #F0A7A0; box-shadow: none; }
  .nav .nav__cta { margin: 14px 0 0; justify-content: center; background: var(--oxblood); padding: 14px; }
  .nav .nav__cta::after { content: ""; }
}

/* ==========================================================
   Sections
   ========================================================== */
.section { padding: 84px 0; }
.section--tight { padding: 56px 0; }
.section--deep { background: var(--enamel-deep); }
.section--ink { background: var(--ink); color: var(--enamel); }
.section--ink .plate { color: var(--chrome); }
.section__head { max-width: 720px; margin-bottom: 40px; }
.lede { font-size: 1.18rem; color: var(--ink-soft); }

/* page hero for inner pages */
.page-hero { padding: 72px 0 40px; }
.page-hero__row { display: flex; align-items: center; gap: 40px; }
.page-hero__row .gauge { --size: 170px; }
.page-hero p.lede { max-width: 640px; }
@media (max-width: 700px) {
  .page-hero { padding: 48px 0 28px; }
  .page-hero__row { flex-direction: column; align-items: flex-start; gap: 24px; }
  .page-hero__row .gauge { --size: 120px; }
}

/* prose */
.prose { max-width: 740px; }
.prose h2 { font-size: 2rem; margin-top: 1.6em; }
.prose h3 { font-size: 1.4rem; margin-top: 1.4em; }
.prose ul, .prose ol { padding-left: 1.2em; margin: 0 0 1.2em; }
.prose li { margin-bottom: .4em; }
.prose li::marker { color: var(--oxblood); }
.two-col { display: grid; grid-template-columns: 1fr 320px; gap: 56px; align-items: start; }
.two-col aside .panel + .panel { margin-top: 20px; }
@media (max-width: 900px) { .two-col { grid-template-columns: 1fr; gap: 36px; } }

/* home: hero */
.hero { padding: 56px 0 40px; position: relative; }
.hero__grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.7fr); gap: 36px; align-items: center; }
.hero h1 { margin-bottom: 18px; }
.hero h1 em { font-style: normal; color: var(--oxblood); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0 26px; }
.hero__notice {
  display: flex; gap: 14px; align-items: center;
  font-size: .9rem; color: var(--ink-soft);
  border-top: 1px solid var(--rule); padding-top: 18px;
}
.hero__notice strong { color: var(--ink); }
.hero__media { display: flex; justify-content: center; }
.hero__img {
  display: block;
  width: min(100%, 340px);
  height: auto;
  border-radius: 12px;
  box-shadow: 0 18px 40px rgba(26, 21, 18, .28);
}
@media (max-width: 1000px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__media { justify-content: flex-start; }
  .hero__img { width: min(100%, 280px); }
}
#play .machine { max-width: 720px; margin: 0 auto; }

/* trust strip */
.trust { background: var(--oxblood); color: var(--enamel); padding: 26px 0; }
.trust__row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.trust__item { display: flex; gap: 14px; align-items: flex-start; font-size: .95rem; line-height: 1.45; }
.trust__item b { display: block; font-family: var(--f-display); font-size: 1.25rem; letter-spacing: .06em; text-transform: uppercase; font-weight: 800; }
.trust__dot { flex: none; width: 34px; height: 34px; border-radius: 50%; border: 2px solid var(--chrome); display: grid; place-items: center; font-family: var(--f-num); font-size: .7rem; font-weight: 700; }
@media (max-width: 900px) { .trust__row { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .trust__row { grid-template-columns: 1fr; } }

/* feature trio */
.trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.trio .panel h3 { margin-top: 18px; }
.trio .gauge { --size: 92px; }
@media (max-width: 900px) { .trio { grid-template-columns: 1fr; } }

/* split band */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; gap: 32px; } }

.readouts { display: flex; flex-wrap: wrap; gap: 26px; }
.readouts figure { margin: 0; text-align: center; }
.readouts figcaption { font-family: var(--f-num); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; margin-top: 10px; color: var(--chrome); }
.readouts .gauge { --size: 130px; }

/* FAQ (always visible) */
.faq { display: grid; gap: 18px; }
.faq .panel h3 { font-size: 1.3rem; margin-bottom: .4em; }
.faq .panel p:last-child { margin-bottom: 0; }

/* ==========================================================
   Footer
   ========================================================== */
.site-foot { background: var(--ink); color: #D9D1C2; padding: 0 0 30px; font-size: .95rem; }
.site-foot .ticks { filter: invert(1); opacity: .5; }
.site-foot__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 44px; padding: 52px 0 36px; }
.site-foot h4 { font-size: 1.1rem; letter-spacing: .12em; color: var(--chrome); margin-bottom: 14px; }
.site-foot ul { list-style: none; padding: 0; margin: 0; }
.site-foot li { margin-bottom: 8px; }
.site-foot a { color: var(--enamel); text-decoration: none; }
.site-foot a:hover { color: #F0A7A0; text-decoration: underline; }
.site-foot .brand { color: var(--enamel); margin-bottom: 16px; }
.site-foot .brand__name span { color: #E0827A; }
.foot-notice {
  display: flex; gap: 18px; align-items: center;
  border: 1px solid rgba(217,209,194,.25); border-radius: var(--radius);
  padding: 16px 20px; margin-bottom: 22px;
}
.foot-notice .age-chip { border-color: #E0827A; color: #E0827A; width: 46px; height: 46px; font-size: .8rem; }
.foot-notice p { margin: 0; font-size: .9rem; line-height: 1.5; }
.foot-copy { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; font-size: .82rem; color: #9C9387; font-family: var(--f-num); letter-spacing: .04em; }
@media (max-width: 800px) { .site-foot__grid { grid-template-columns: 1fr 1fr; } .site-foot__grid > :first-child { grid-column: 1 / -1; } }
@media (max-width: 460px) { .site-foot__grid { grid-template-columns: 1fr; } .foot-notice { align-items: flex-start; } }

@media (max-width: 600px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  .section { padding: 60px 0; }
  .panel { padding: 26px 20px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; scroll-behavior: auto !important; }
}

/* active nav state is driven by body[data-page] so header markup stays byte-identical */
body[data-page="home"] .nav a[data-nav="home"],
body[data-page="about"] .nav a[data-nav="about"],
body[data-page="responsible-play"] .nav a[data-nav="responsible-play"],
body[data-page="support"] .nav a[data-nav="support"] { color: var(--oxblood); box-shadow: inset 0 -3px 0 var(--oxblood); border-radius: 0; }
body[data-page="game"] .nav .nav__cta { background: var(--oxblood); }
@media (max-width: 900px) {
  body[data-page] .nav a[data-nav] { box-shadow: none; }
  body[data-page="home"] .nav a[data-nav="home"],
  body[data-page="about"] .nav a[data-nav="about"],
  body[data-page="responsible-play"] .nav a[data-nav="responsible-play"],
  body[data-page="support"] .nav a[data-nav="support"] { color: #F0A7A0; }
}
.section--ink a { color: #F0A7A0; }
.section--ink a:hover { color: var(--enamel); }
.brand__sub { white-space: nowrap; }
@media (max-width: 420px) { .brand__sub { font-size: .52rem; letter-spacing: .14em; } .brand__name { font-size: 1.4rem; } }