/* hiumod — the panel's palette (src/ui/theme.rs): slate, fog, one Lymbic blue. */
:root {
  --ground: #0e1217;
  --surface: #13181f;
  --card: #1a2028;
  --edge: #2a323d;
  --control: #222a34;
  --text: #d9e1ea;
  --dim: #8b96a3;
  --title: #e6eef7;
  --accent: #5a9ce6;
  --accent-deep: #22344d;
  --ok: #8fd17a;
  --display: 'Fira Sans Extra Condensed', 'Noto Sans KR', 'Noto Sans JP', 'Noto Sans SC', sans-serif;
  --body: 'IBM Plex Sans', 'Noto Sans KR', 'Noto Sans JP', 'Noto Sans SC', system-ui, sans-serif;
  --wrap: min(1120px, 100% - 32px);
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: clip; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--ground);
  color: var(--text);
  font: 400 17px/1.65 var(--body);
  overflow-x: hidden;
}
:lang(ko), :lang(ja), :lang(zh-Hans) { --display: var(--body); word-break: keep-all; line-break: strict; }
a { color: var(--accent); text-underline-offset: 3px; }
img { display: block; }
h1, h2, h3 { font-family: var(--display); color: var(--title); line-height: 1.08; margin: 0; text-wrap: balance; }
h2 { font-size: clamp(30px, 4.4vw, 48px); font-weight: 600; letter-spacing: 0.01em; margin-bottom: 0.6em; }
h3 { font-size: 22px; font-weight: 600; letter-spacing: 0.02em; }
p { margin: 0 0 1em; text-wrap: pretty; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 12px; z-index: 50; background: var(--accent); color: var(--ground); padding: 8px 12px; border-radius: 5px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* the bar */
.bar {
  position: fixed; inset: 0 0 auto; z-index: 20;
  display: flex; align-items: center; gap: 24px;
  padding: 14px max(16px, (100% - 1120px) / 2);
  background: linear-gradient(var(--ground), rgb(14 18 23 / 0));
}
.mark { display: flex; align-items: center; gap: 9px; color: var(--title); text-decoration: none; font: 600 21px/1 var(--display); letter-spacing: 0.04em; }
.mark svg { width: 22px; height: 22px; fill: none; stroke: var(--accent); stroke-width: 1.6; }
.bar nav { display: flex; gap: 22px; margin-left: auto; }
.bar nav a { color: var(--dim); text-decoration: none; font: 500 15px/1 var(--display); letter-spacing: 0.08em; text-transform: uppercase; }
.bar nav a:hover { color: var(--title); }
.langs { position: relative; }
.langs summary {
  list-style: none; cursor: pointer; color: var(--text);
  font: 500 14px/1 var(--body); padding: 8px 12px; border: 1px solid var(--edge); border-radius: 5px; background: rgb(19 24 31 / 0.7);
}
.langs summary::-webkit-details-marker { display: none; }
.langs summary::after { content: ' ▾'; color: var(--dim); }
.langs ul {
  position: absolute; right: 0; top: calc(100% + 6px); margin: 0; padding: 6px; list-style: none;
  background: var(--surface); border: 1px solid var(--edge); border-radius: 8px; min-width: 200px;
  box-shadow: 0 20px 50px rgb(0 0 0 / 0.5);
}
.langs a { display: block; padding: 7px 10px; border-radius: 5px; color: var(--text); text-decoration: none; font-size: 15px; }
.langs a:hover { background: var(--control); }
.langs a[aria-current] { background: var(--accent-deep); color: var(--title); }

/* the hero */
.hero { position: relative; min-height: 100svh; display: grid; align-items: end; overflow: hidden; isolation: isolate; }
#terrain { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -2; image-rendering: auto; } /* drawn small, scaled up smoothly */
.hero::before { /* the SVG contour fallback, under the canvas until WebGL draws */
  content: ''; position: absolute; inset: 0; z-index: -3;
  background:
    radial-gradient(120% 80% at 60% 30%, rgb(90 156 230 / 0.08), transparent 60%),
    repeating-radial-gradient(ellipse at 65% 40%, transparent 0 22px, rgb(139 150 163 / 0.10) 23px 24px),
    var(--ground);
}
.hero::after { /* the copy's shade */
  content: ''; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: linear-gradient(to top, var(--ground) 2%, rgb(14 18 23 / 0.7) 32%, transparent 62%),
              linear-gradient(to right, rgb(14 18 23 / 0.75), transparent 60%);
}
.hero-copy { width: var(--wrap); margin: 0 auto; padding: 150px 0 12vh; }
.kicker { font: 500 15px/1 var(--display); letter-spacing: 0.22em; text-transform: uppercase; color: var(--accent); margin-bottom: 22px; }
h1 { font-size: clamp(44px, min(7vw, 11svh), 104px); font-weight: 800; letter-spacing: -0.005em; text-transform: uppercase; max-width: 14ch; }
:lang(ko) h1, :lang(ja) h1, :lang(zh-Hans) h1 { text-transform: none; font-size: clamp(38px, 6.4vw, 80px); font-weight: 700; max-width: 16ch; letter-spacing: -0.02em; }
.lede { max-width: min(54ch, 100%); font-size: clamp(17px, 1.6vw, 20px); color: var(--text); margin: 28px 0 34px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px;
  font: 600 16px/1 var(--display); letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--title); background: rgb(34 42 52 / 0.75); border: 1px solid var(--edge); border-radius: 5px;
  text-decoration: none; cursor: pointer; transition: border-color .2s, background .2s, transform .2s;
}
.btn:hover { border-color: var(--accent); }
.btn:active { transform: translateY(1px); }
.btn-main { background: var(--accent); border-color: var(--accent); color: var(--ground); }
.btn-main:hover { background: #75b0f0; }
.fine { margin-top: 22px; font-size: 13px; color: var(--dim); }
.scroll-hint { position: absolute; right: max(16px, (100% - 1120px) / 2); bottom: 5vh; margin: 0; font: 500 12px/1 var(--display); letter-spacing: 0.3em; text-transform: uppercase; color: var(--dim); writing-mode: vertical-rl; }
.scroll-hint::after { content: ''; display: block; width: 1px; height: 48px; margin: 14px auto 0; background: linear-gradient(var(--dim), transparent); }

/* the compass the game doesn't have */
.compass {
  position: absolute; top: 76px; left: 50%; translate: -50% 0; width: min(520px, 80%); height: 26px;
  overflow: hidden; mask-image: linear-gradient(to right, transparent, #000 25%, #000 75%, transparent);
}
.compass-track {
  position: absolute; inset: 0 -200px; transform: translateX(var(--turn, 0px)); transition: transform 1.2s cubic-bezier(.2,.7,.2,1);
  background:
    repeating-linear-gradient(to right, rgb(139 150 163 / .55) 0 1px, transparent 1px 24px) 0 100% / 100% 7px no-repeat,
    repeating-linear-gradient(to right, rgb(217 225 234 / .7) 0 1px, transparent 1px 120px) 0 100% / 100% 13px no-repeat;
}
.compass-goal { position: absolute; left: 50%; top: 0; width: 9px; height: 9px; translate: -50% 0; rotate: 45deg; background: var(--accent); box-shadow: 0 0 14px var(--accent); }

/* sections */
main > section:not(.hero) { width: var(--wrap); margin: 0 auto; padding: clamp(72px, 11vw, 140px) 0 0; }
main > section:not(.hero) { opacity: 0; translate: 0 24px; transition: opacity .9s ease, translate .9s cubic-bezier(.2,.7,.2,1); }
main > section.in { opacity: 1; translate: 0 0; }
@media (prefers-reduced-motion: reduce) { main > section:not(.hero) { opacity: 1; translate: none; transition: none; } }
.film figure { margin: 0; }
.film video { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; border: 1px solid var(--edge); border-radius: 12px; background: var(--surface) center / cover; box-shadow: 0 40px 120px rgb(0 0 0 / .45); }
.film figcaption { margin-top: 14px; font-size: 14px; color: var(--dim); }
.intro { display: grid; grid-template-columns: 1fr 1.25fr; gap: 0 64px; }
.intro h2 { grid-row: span 2; }
.intro p { color: var(--text); font-size: 18px; }
.intro p + p { color: var(--dim); }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--edge); border-left: 1px solid var(--edge); }
.grid article { padding: 30px 28px 34px; border-right: 1px solid var(--edge); border-bottom: 1px solid var(--edge); position: relative; transition: background .3s; }
.grid article:hover { background: var(--surface); }
.grid article::before { content: ''; position: absolute; left: -1px; top: -1px; width: 0; height: 2px; background: var(--accent); transition: width .4s cubic-bezier(.2,.7,.2,1); }
.grid article:hover::before { width: calc(100% + 1px); }
.ico { width: 36px; height: 36px; margin-bottom: 26px; filter: grayscale(1) brightness(1.15) opacity(.85); transition: filter .4s; }
.grid article:hover .ico { filter: grayscale(1) sepia(1) hue-rotate(175deg) saturate(2.6) brightness(1.05); }
.grid h3 { margin-bottom: 10px; }
.grid p { color: var(--dim); font-size: 15.5px; margin: 0; }

.spoilers { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.spoilers-copy p { color: var(--dim); font-size: 18px; max-width: 44ch; }
.vault {
  position: relative; padding: 34px 32px 30px; background: var(--card); border: 1px solid var(--edge); border-radius: 10px;
  background-image: repeating-radial-gradient(circle at 85% 15%, transparent 0 15px, rgb(139 150 163 / .06) 16px 17px);
}
.vault-name { font: 500 14px/1 var(--display); letter-spacing: .2em; text-transform: uppercase; color: var(--dim); }
.vault-code { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 22px 0 26px; }
.vault-code img { width: 100%; aspect-ratio: 1; padding: 14%; background: var(--ground); border: 1px solid var(--edge); border-radius: 8px; transition: filter .6s, opacity .6s; }
.vault[data-hidden='true'] .vault-code img { filter: blur(9px) brightness(.6); opacity: .55; }
.vault[data-hidden='false'] .vault-code img { border-color: var(--accent-deep); }
.reveal { width: 100%; }

.safety ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 48px; }
.safety li { padding: 22px 0 22px 34px; border-top: 1px solid var(--edge); color: var(--dim); position: relative; }
.safety li::before { content: ''; position: absolute; left: 4px; top: 30px; width: 11px; height: 11px; rotate: 45deg; border: 1.5px solid var(--ok); }
.safety strong { display: block; color: var(--title); font-weight: 600; margin-bottom: 2px; }

.install ol { list-style: none; counter-reset: s; margin: 0 0 40px; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.install li { counter-increment: s; padding: 26px 24px; background: var(--surface); border: 1px solid var(--edge); border-radius: 8px; }
.install li::before { content: counter(s); display: grid; place-items: center; width: 34px; height: 34px; margin-bottom: 18px; border: 1px solid var(--accent); border-radius: 50%; color: var(--accent); font: 600 17px/1 var(--display); }
.install h3 { margin-bottom: 8px; }
.install p { color: var(--dim); font-size: 15.5px; margin: 0; }

.faq details, .faq h2 { max-width: 860px; }
.faq details { border-top: 1px solid var(--edge); }
.faq details:last-child { border-bottom: 1px solid var(--edge); }
.faq summary { cursor: pointer; list-style: none; padding: 22px 40px 22px 0; position: relative; font: 600 20px/1.3 var(--display); letter-spacing: .01em; color: var(--title); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; position: absolute; right: 4px; top: 18px; font: 300 28px/1 var(--body); color: var(--accent); transition: rotate .3s; }
.faq details[open] summary::after { rotate: 45deg; }
.faq details p { color: var(--dim); margin: 0 0 24px; max-width: 70ch; }

.foot { width: var(--wrap); margin: clamp(80px, 12vw, 160px) auto 0; padding: 32px 0 48px; border-top: 1px solid var(--edge); color: var(--dim); font-size: 14px; }
.foot p { margin: 0 0 6px; max-width: 80ch; }

@media (max-width: 900px) {
  .bar nav { display: none; }
  .langs { margin-left: auto; }
  .intro, .spoilers { grid-template-columns: 1fr; gap: 24px; }
  .grid { grid-template-columns: 1fr 1fr; }
  .install ol { grid-template-columns: 1fr; }
  .safety ul { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .grid { grid-template-columns: 1fr; }
  .scroll-hint { display: none; }
  .compass { top: 66px; }
  .hero-copy { padding-bottom: 9vh; }
  .btn { flex: 1 1 100%; }
}