:root {
  --bg: #061014;
  --bg-deep: #03090b;
  --surface: #0b171b;
  --surface-2: #101f24;
  --surface-3: #14272d;
  --line: #243a42;
  --line-bright: #3f5d67;
  --text: #e7f0f1;
  --muted: #879ba2;
  --dim: #53666d;
  --mint: #73f2b4;
  --mint-soft: rgba(115, 242, 180, .12);
  --amber: #f4c96b;
  --amber-soft: rgba(244, 201, 107, .12);
  --red: #ef6f6c;
  --red-soft: rgba(239, 111, 108, .12);
  --blue: #76c7ef;
  --shadow: 0 26px 80px rgba(0, 0, 0, .38);
  --display: "Arial Narrow", "Roboto Condensed", Impact, sans-serif;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

* { box-sizing: border-box; }
html { min-width: 320px; color-scheme: dark; }
body { margin: 0; min-height: 100vh; overflow-x: hidden; color: var(--text); background: var(--bg-deep); font-family: var(--sans); }
button, input { font: inherit; }
button { color: inherit; }
button:not(:disabled), a { cursor: pointer; }
button:disabled { cursor: not-allowed; }
img { display: block; max-width: 100%; }
h1, h2, h3, p { margin-top: 0; }
a { color: inherit; }
::selection { color: #04100a; background: var(--mint); }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 3px; }

.skip-link { position: fixed; z-index: 200; top: 10px; left: 10px; padding: 10px 14px; color: #07110c; background: var(--mint); font-weight: 800; transform: translateY(-150%); }
.skip-link:focus { transform: none; }
.app-shell { min-height: 100vh; background:
  linear-gradient(rgba(115, 242, 180, .018) 1px, transparent 1px),
  linear-gradient(90deg, rgba(115, 242, 180, .018) 1px, transparent 1px),
  radial-gradient(circle at 18% -5%, rgba(28, 111, 88, .21), transparent 33%),
  var(--bg);
  background-size: 48px 48px, 48px 48px, auto, auto;
}

.topbar { position: relative; z-index: 30; display: flex; height: 70px; padding: 0 clamp(16px, 3vw, 42px); align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--line); background: rgba(4, 12, 15, .94); backdrop-filter: blur(16px); }
.topbar-start { display: flex; min-width: 0; align-items: center; gap: clamp(14px, 2vw, 30px); }
.brand { display: inline-flex; align-items: center; gap: 11px; color: inherit; text-decoration: none; }
.brand img { width: 39px; height: 39px; }
.brand > span, .brand strong, .brand small { display: block; }
.brand strong { font: 800 1rem/1 var(--sans); letter-spacing: .13em; }
.brand strong em { color: var(--mint); font-style: normal; }
.brand small { margin-top: 4px; color: var(--muted); font: 500 .56rem/1 var(--mono); letter-spacing: .07em; text-transform: uppercase; }
.site-home-link { display: inline-flex; min-height: 34px; padding-left: clamp(12px, 1.5vw, 22px); align-items: center; gap: 7px; border-left: 1px solid var(--line); color: var(--muted); font: 800 .48rem/1 var(--mono); letter-spacing: .08em; text-decoration: none; transition: color .2s ease; }
.site-home-link span { color: var(--mint); font-size: .8rem; }
.site-home-link:hover, .site-home-link:focus-visible { color: var(--text); }
.system-status { display: flex; align-items: center; gap: 9px; color: var(--muted); font: 600 .57rem/1 var(--mono); letter-spacing: .08em; }
.system-status time { min-width: 68px; color: var(--text); }
.status-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 12px var(--mint); }
.compact-player { display: flex; align-items: center; gap: 9px; }
.level-seal { display: grid; width: 35px; height: 35px; place-items: center; border: 1px solid rgba(115, 242, 180, .42); clip-path: polygon(25% 0,75% 0,100% 25%,100% 75%,75% 100%,25% 100%,0 75%,0 25%); color: var(--mint); background: var(--mint-soft); font: 800 .64rem/1 var(--mono); }
.compact-player-copy small, .compact-player-copy strong { display: block; }
.compact-player-copy small { color: var(--muted); font: 600 .53rem/1.25 var(--mono); }
.compact-player-copy strong { margin-top: 3px; font-size: .7rem; }
.icon-button { display: grid; width: 36px; height: 36px; padding: 0; place-items: center; border: 1px solid var(--line); border-radius: 4px; color: var(--muted); background: var(--surface); font-size: 1rem; }
.icon-button:hover { border-color: var(--line-bright); color: var(--text); background: var(--surface-2); }

main { min-height: calc(100vh - 70px); }
.screen { position: relative; min-height: calc(100vh - 70px); }
.screen[hidden] { display: none !important; }
.menu-screen { display: grid; padding: clamp(30px, 4vw, 58px) clamp(18px, 5vw, 76px); place-items: center; overflow: hidden; }
.menu-screen::before { position: absolute; inset: 0; background: linear-gradient(105deg, transparent 0 47%, rgba(115, 242, 180, .025) 47% 47.2%, transparent 47.2%), radial-gradient(circle at 75% 50%, rgba(26, 98, 79, .11), transparent 37%); content: ""; }
.menu-ambient { position: absolute; inset: 0; pointer-events: none; }
.menu-ambient::before, .menu-ambient::after { position: absolute; width: 310px; height: 310px; border: 1px solid rgba(115, 242, 180, .07); border-radius: 50%; content: ""; }
.menu-ambient::before { top: 15%; left: -190px; box-shadow: 0 0 0 38px rgba(115, 242, 180, .02), 0 0 0 76px rgba(115, 242, 180, .012); }
.menu-ambient::after { right: -200px; bottom: -190px; }
.scan-line { position: absolute; inset: -25% 0 auto; height: 30%; background: linear-gradient(transparent, rgba(115, 242, 180, .035), transparent); }
.coordinate { position: absolute; color: rgba(115, 242, 180, .24); font: .56rem/1 var(--mono); letter-spacing: .18em; }
.coordinate.c1 { bottom: 5%; left: 3%; }.coordinate.c2 { top: 7%; right: 4%; }
.menu-layout { position: relative; z-index: 1; display: grid; width: min(1180px, 100%); grid-template-columns: minmax(0, 1.08fr) minmax(380px, .92fr); gap: clamp(28px, 6vw, 84px); align-items: center; }
.hero-panel { position: relative; min-height: 650px; padding: clamp(32px, 5vw, 66px); overflow: hidden; border: 1px solid rgba(115, 242, 180, .15); background: linear-gradient(145deg, rgba(15, 34, 38, .8), rgba(4, 11, 13, .72)); box-shadow: var(--shadow); }
.hero-panel::before, .hero-panel::after { position: absolute; width: 54px; height: 54px; border-color: var(--mint); opacity: .6; content: ""; }
.hero-panel::before { top: 13px; left: 13px; border-top: 2px solid; border-left: 2px solid; }.hero-panel::after { right: 13px; bottom: 13px; border-right: 2px solid; border-bottom: 2px solid; }
.classification { display: flex; align-items: center; gap: 10px; color: var(--muted); font: 600 .57rem/1 var(--mono); letter-spacing: .1em; }
.classification span { color: var(--mint); }.classification b { margin-left: auto; padding: 5px 7px; border: 1px solid rgba(239, 111, 108, .45); color: var(--red); font-size: .52rem; }
.hero-mark { position: absolute; top: 75px; right: 18px; opacity: .1; transform: rotate(8deg); }
.hero-mark img { width: 190px; height: auto; }
.eyebrow { margin-bottom: 12px; color: var(--mint); font: 700 .61rem/1.4 var(--mono); letter-spacing: .15em; text-transform: uppercase; }
.hero-panel .eyebrow { margin-top: 95px; }
.hero-panel h1 { margin-bottom: 18px; font: 900 clamp(4.2rem, 8vw, 7.8rem)/.74 var(--display); letter-spacing: -.045em; }
.hero-panel h1 span { color: transparent; -webkit-text-stroke: 1px var(--mint); text-shadow: 0 0 30px rgba(115, 242, 180, .13); }
.tagline { margin-bottom: 18px; color: var(--amber); font: 650 clamp(1rem, 1.7vw, 1.35rem)/1.35 var(--mono); text-transform: uppercase; }
.hero-copy { max-width: 440px; color: #aab9be; font-size: .88rem; line-height: 1.7; }
.case-signal { position: absolute; right: clamp(28px, 4vw, 52px); bottom: clamp(28px, 4vw, 50px); left: clamp(28px, 4vw, 52px); display: grid; padding: 14px 16px 14px 44px; grid-template-columns: 1fr auto; gap: 3px 14px; border: 1px solid var(--line); background: rgba(5, 13, 16, .75); }
.case-signal > span { position: absolute; top: 18px; left: 17px; width: 10px; height: 10px; border: 2px solid var(--amber); border-radius: 50%; box-shadow: 0 0 12px rgba(244, 201, 107, .5); }
.case-signal strong { font: 700 .66rem/1 var(--mono); letter-spacing: .12em; }.case-signal small { grid-row: 1 / span 2; grid-column: 2; align-self: center; color: var(--muted); font: .58rem/1.3 var(--mono); }.case-signal > small:last-child { grid-row: auto; grid-column: 1; }

.menu-console { border: 1px solid var(--line); background: rgba(8, 19, 23, .94); box-shadow: var(--shadow); }
.console-head { display: flex; min-height: 58px; padding: 13px 16px; align-items: center; justify-content: space-between; gap: 16px; border-bottom: 1px solid var(--line); color: var(--text); font: 700 .64rem/1.3 var(--mono); letter-spacing: .08em; }
.console-head small { max-width: 180px; color: var(--muted); font: 400 .55rem/1.4 var(--mono); text-align: right; }
.main-menu { padding: 8px; }
.menu-button { display: grid; width: 100%; min-height: 69px; padding: 10px 13px; grid-template-columns: 32px minmax(0, 1fr) 22px; align-items: center; gap: 11px; border: 1px solid transparent; border-bottom-color: rgba(36, 58, 66, .72); color: var(--text); background: transparent; text-align: left; transition: border-color .18s ease, background .18s ease, transform .18s ease; }
.menu-button:hover:not(:disabled), .menu-button:focus-visible { border-color: rgba(115, 242, 180, .32); background: var(--mint-soft); transform: translateX(3px); }
.menu-button.primary { margin-bottom: 8px; border-color: rgba(115, 242, 180, .34); background: linear-gradient(90deg, rgba(115, 242, 180, .15), rgba(115, 242, 180, .035)); }
.menu-button:disabled { color: var(--dim); opacity: .6; }
.menu-button > span:nth-child(2), .menu-button strong, .menu-button small { display: block; }
.menu-index { color: var(--mint); font: 600 .61rem/1 var(--mono); }.menu-button strong { font: 800 .77rem/1.2 var(--sans); letter-spacing: .06em; }.menu-button small { margin-top: 4px; color: var(--muted); font: .58rem/1.2 var(--mono); }.menu-button i { color: var(--mint); font-style: normal; }
.console-foot { display: flex; padding: 11px 14px; justify-content: space-between; gap: 10px; border-top: 1px solid var(--line); color: var(--dim); font: .48rem/1 var(--mono); letter-spacing: .06em; }

.intro-screen { display: grid; padding: clamp(26px, 5vw, 70px); place-items: center; }
.intro-grid { display: grid; width: min(1180px, 100%); grid-template-columns: 1.05fr .95fr; gap: 18px; }
.case-file, .museum-card { border: 1px solid var(--line); background: rgba(10, 23, 27, .96); box-shadow: var(--shadow); }
.file-header { display: flex; min-height: 72px; padding: 15px 20px; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .018); }
.file-header small, .file-header strong { display: block; }.file-header small { color: var(--muted); font: .54rem/1.4 var(--mono); }.file-header strong { margin-top: 4px; font: 800 .74rem/1 var(--mono); }.file-header > span { padding: 6px 9px; border: 1px solid rgba(244, 201, 107, .42); color: var(--amber); font: 700 .55rem/1 var(--mono); transform: rotate(-2deg); }
.file-body { padding: clamp(26px, 4vw, 50px); }.file-body h2 { margin-bottom: 19px; font: 900 clamp(3rem, 6vw, 5.7rem)/.85 var(--display); letter-spacing: -.03em; }.case-lead { max-width: 670px; color: #b6c4c8; font-size: .95rem; line-height: 1.75; }
.case-facts { display: grid; margin: 26px 0; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.case-facts div { padding: 13px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }.case-facts dt { color: var(--muted); font: .53rem/1.3 var(--mono); text-transform: uppercase; }.case-facts dd { margin: 5px 0 0; font: 700 .68rem/1.3 var(--mono); }.alert-text { color: var(--red); }
.briefing { display: grid; padding: 15px; grid-template-columns: 32px 1fr; gap: 11px; border: 1px solid rgba(244, 201, 107, .25); background: var(--amber-soft); }.briefing-icon { display: grid; width: 27px; height: 27px; place-items: center; border: 1px solid var(--amber); color: var(--amber); font: 800 .74rem/1 var(--mono); }.briefing p { margin: 0; color: #c8d3d6; font-size: .78rem; line-height: 1.65; }.briefing strong { display: block; margin-bottom: 3px; color: var(--amber); font: 700 .61rem/1.3 var(--mono); text-transform: uppercase; }
.intro-actions { display: flex; margin-top: 25px; justify-content: flex-end; gap: 9px; }
.museum-card { position: relative; min-height: 570px; padding: 14px; overflow: hidden; }.museum-card::after { position: absolute; inset: 0; background: repeating-linear-gradient(transparent 0 3px, rgba(2, 8, 10, .15) 4px); pointer-events: none; content: ""; }.museum-card > img { width: 100%; height: 100%; min-height: 540px; object-fit: cover; opacity: .9; }.media-label { position: absolute; z-index: 2; top: 28px; right: 28px; left: 28px; display: flex; justify-content: space-between; color: var(--mint); font: 700 .56rem/1 var(--mono); }.media-label b { padding: 4px 6px; color: var(--red); background: rgba(239, 111, 108, .14); }.museum-scan { position: absolute; z-index: 2; right: 28px; bottom: 28px; left: 28px; display: flex; padding: 14px; align-items: center; gap: 12px; border: 1px solid rgba(239, 111, 108, .4); background: rgba(4, 12, 15, .88); }.museum-scan > span { width: 8px; height: 8px; flex: 0 0 auto; border-radius: 50%; background: var(--red); box-shadow: 0 0 14px var(--red); }.museum-scan p, .museum-scan strong { display: block; margin: 0; }.museum-scan strong { margin-bottom: 4px; color: var(--red); font: 700 .56rem/1 var(--mono); }.museum-scan p { color: var(--muted); font: .55rem/1.4 var(--mono); }

.complete-screen { display: grid; padding: clamp(28px, 5vw, 72px) 18px; place-items: center; }
.complete-card { position: relative; width: min(880px, 100%); padding: clamp(30px, 6vw, 70px); overflow: hidden; border: 1px solid rgba(115, 242, 180, .3); background: linear-gradient(145deg, rgba(14, 34, 36, .98), rgba(5, 13, 15, .98)); box-shadow: var(--shadow); }
.complete-card::before { position: absolute; top: -160px; right: -140px; width: 440px; height: 440px; border: 1px solid rgba(115, 242, 180, .1); border-radius: 50%; box-shadow: 0 0 0 55px rgba(115, 242, 180, .025), 0 0 0 110px rgba(115, 242, 180, .015); content: ""; }
.complete-card h2 { position: relative; margin-bottom: 16px; font: 900 clamp(3rem, 7vw, 6.4rem)/.84 var(--display); letter-spacing: -.035em; }.complete-card > p:not(.eyebrow) { max-width: 690px; color: #afbec2; line-height: 1.7; }.complete-stamp { position: absolute; top: 38px; right: 42px; z-index: 2; display: grid; width: 112px; height: 112px; place-items: center; align-content: center; border: 3px double var(--mint); border-radius: 50%; color: var(--mint); transform: rotate(8deg); }.complete-stamp span, .complete-stamp small { font: 700 .48rem/1.5 var(--mono); letter-spacing: .12em; }.complete-stamp strong { font: 900 .8rem/1 var(--sans); }
.result-stars { margin: 22px 0 16px; color: var(--amber); font-size: 2.4rem; letter-spacing: .15em; text-shadow: 0 0 18px rgba(244, 201, 107, .25); }
.result-grid { display: grid; margin-bottom: 17px; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }.result-grid div { padding: 16px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }.result-grid small, .result-grid strong { display: block; }.result-grid small { color: var(--muted); font: .51rem/1.3 var(--mono); }.result-grid strong { margin-top: 6px; color: var(--mint); font: 800 1rem/1 var(--mono); }
.learning-reveal { display: grid; padding: 18px; grid-template-columns: 74px minmax(0,1fr); align-items: center; gap: 18px; border: 1px solid rgba(115, 242, 180, .27); background: var(--mint-soft); }.learning-reveal small { color: var(--mint); font: 700 .52rem/1 var(--mono); letter-spacing: .12em; }.learning-reveal h3 { margin: 5px 0; font-size: 1.3rem; }.learning-reveal h3 span { margin-left: 7px; color: var(--muted); font: .65rem/1 var(--mono); }.learning-reveal p { margin: 0; color: #c2cfd2; font-size: .75rem; }.learning-reveal p strong { color: var(--amber); }
.structure-emblem { display: flex; width: 62px; flex-direction: column; gap: 4px; }.structure-emblem i { display: block; height: 14px; border: 1px solid var(--mint); background: rgba(115, 242, 180, .14); }.complete-actions { display: flex; margin-top: 24px; justify-content: flex-end; gap: 9px; }

@media (max-width: 980px) {
  .system-status { display: none; }
  .menu-layout, .intro-grid { grid-template-columns: 1fr; }
  .hero-panel { min-height: 590px; }
  .museum-card { min-height: 400px; }.museum-card > img { min-height: 370px; }
}
@media (max-width: 640px) {
  .topbar { height: 62px; padding-inline: 12px; }.brand small, .compact-player-copy { display: none; }.brand img { width: 34px; height: 34px; }
  main, .screen { min-height: calc(100vh - 62px); }
  .menu-screen { padding: 18px 12px; }.hero-panel { min-height: 490px; padding: 27px 22px; }.hero-panel .eyebrow { margin-top: 65px; }.hero-panel h1 { font-size: 4rem; }.case-signal { right: 22px; bottom: 22px; left: 22px; }.case-signal small { display: none; }
  .console-head { align-items: flex-start; flex-direction: column; }.console-head small { max-width: none; text-align: left; }.console-foot span:last-child { display: none; }
  .intro-screen { padding: 14px 10px; }.case-facts { grid-template-columns: 1fr; }.intro-actions, .complete-actions { align-items: stretch; flex-direction: column-reverse; }.intro-actions .button, .complete-actions .button { justify-content: center; }
  .complete-stamp { position: relative; top: auto; right: auto; width: 92px; height: 92px; margin: 0 0 28px auto; }.result-grid { grid-template-columns: 1fr 1fr; }.learning-reveal { grid-template-columns: 1fr; }
}