@charset "UTF-8";

:root {
  --bg: #050816;
  --surface: #0b1429;
  --ink: #f2f7ff;
  --muted: #a0afc9;
  --cyan: #6cf3ff;
  --mint: #6cf3ff;
  --violet: #a69aff;
  --orange: #ffbc94;
  --line: rgba(125, 166, 228, .19);
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --wrap: 1280px;
  color-scheme: dark;
  font-family: Inter, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 110px; }
body { margin: 0; background: var(--bg); color: var(--ink); font-size: 1rem; line-height: 1.7; -webkit-font-smoothing: antialiased; }
body::before { content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none; background: radial-gradient(ellipse at 100% 30%, #29478912, transparent 50%); }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; }
button:disabled { cursor: default; }
button, a { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
img { display: block; max-width: 100%; }
h1, h2, h3, p { margin: 0; }
a:focus-visible, button:focus-visible, summary:focus-visible, [role="tabpanel"]:focus-visible { outline: 2px solid var(--cyan); outline-offset: 5px; }
::selection { background: var(--cyan); color: var(--bg); }
[hidden] { display: none !important; }
.wrap { width: min(var(--wrap), calc(100% - 112px)); margin-inline: auto; }
.skip-link { position: fixed; top: -80px; left: 20px; z-index: 100; background: var(--cyan); color: var(--bg); padding: 10px 20px; }
.skip-link:focus { top: 10px; }
.reading-progress { position: fixed; top: 0; left: 0; height: 2px; width: 100%; z-index: 80; transform-origin: left; transform: scaleX(var(--scroll-progress, 0)); background: linear-gradient(90deg, var(--cyan), var(--violet)); box-shadow: 0 0 12px #6cf3ff80; pointer-events: none; }

/* Navigation floats above the spatial scene. */
.site-header { height: 100px; padding: 0 4%; display: flex; align-items: center; justify-content: space-between; gap: 22px; position: absolute; inset: 0 0 auto; z-index: 30; border-bottom: 1px solid var(--line); background: linear-gradient(#060d1ccc, #060d1c22); }
.brand { display: flex; align-items: center; gap: 12px; font-size: 1.2rem; font-weight: 650; line-height: 1.45; letter-spacing: 2px; white-space: nowrap; }
.brand small { display: block; font-family: var(--mono); font-size: .75rem; letter-spacing: 2px; color: #9fbbd7; font-weight: 400; }
.brand-mark { width: 38px; height: 42px; fill: none; stroke: var(--cyan); stroke-width: 1.6; filter: drop-shadow(0 0 8px #6cf3ff55); }
.site-header nav { display: flex; gap: 31px; font-size: .875rem; color: #c2cde1; }
.site-header nav a { padding: 10px 0; position: relative; transition: color .2s; white-space: nowrap; }
.site-header nav a::after { content: ""; position: absolute; bottom: 2px; left: 0; right: 0; height: 1px; background: var(--cyan); transform: scaleX(0); transition: transform .2s; }
.site-header nav a:hover { color: var(--cyan); }
.site-header nav a:hover::after { transform: scaleX(1); }
.header-actions { display: flex; align-items: center; gap: 24px; }
.header-cta { padding: 11px 19px; border: 1px solid #6cf3ff65; background: linear-gradient(115deg, #6cf3ff15, #9c82ff12); display: flex; align-items: center; gap: 25px; font-size: .875rem; border-radius: 3px; white-space: nowrap; transition: background .2s, box-shadow .2s; }
.header-cta:hover { background: #6cf3ff24; box-shadow: 0 0 24px #6cf3ff18; }
.header-cta span { font-size: 1.25rem; color: var(--cyan); }
.motion-toggle { display: flex; align-items: center; gap: 7px; min-height: 44px; padding: 6px 0; background: transparent; font-size: .75rem; color: #b7c6de; white-space: nowrap; }
.motion-toggle svg { width: 21px; height: 21px; fill: none; stroke: var(--cyan); stroke-width: 1.3; }
.motion-toggle[aria-pressed="true"] svg { stroke: #7285a6; }
.menu-toggle { display: none; }
.mobile-nav { position: absolute; top: 86px; left: 20px; right: 20px; display: grid; z-index: 40; padding: 14px; border: 1px solid #6cf3ff50; border-radius: 4px; background: #091226f7; box-shadow: 0 15px 50px #0008; backdrop-filter: blur(20px); }
.mobile-nav a { padding: 13px 10px; border-bottom: 1px solid var(--line); }
.mobile-nav a:last-child { border: 0; }

/* The hero uses generated concept art; the overlays are a spatial viewfinder. */
.hero { min-height: max(810px, min(900px, 100svh)); padding-bottom: 130px; position: relative; isolation: isolate; overflow: hidden; }
.hero-art { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: right center; z-index: -4; }
.hero-shade { position: absolute; inset: 0; z-index: -3; background: linear-gradient(90deg, #050b18d9 0%, #050b1880 33%, transparent 70%), linear-gradient(0deg, var(--bg), transparent 35%); }
.hero-grid { position: absolute; inset: 100px 0 0; pointer-events: none; z-index: -2; opacity: .4; background-image: linear-gradient(#759dff12 1px, transparent 1px), linear-gradient(90deg, #759dff12 1px, transparent 1px); background-size: 90px 90px; mask-image: linear-gradient(90deg, black, transparent 45%); }
.hero-light { display: none; position: absolute; top: 47%; left: 66%; width: 600px; height: 500px; z-index: -1; pointer-events: none; background: radial-gradient(ellipse, #79eaff29, #a18bff12 35%, transparent 68%); }
.spatial-depth { display: none; position: absolute; left: 51%; right: 8%; top: 36%; bottom: 17%; z-index: 2; pointer-events: none; }
.depth-orbit { position: absolute; left: -9%; right: -8%; top: 45%; height: 43%; border: 1px solid #9aefff66; border-right-color: transparent; border-radius: 50%; transform: rotate(-16deg); box-shadow: 0 0 22px #60cbff10; }
.depth-orbit::after { content: ""; position: absolute; inset: 15px 24px; border: 1px dashed #aea4ff66; border-left-color: transparent; border-radius: 50%; }
.depth-point { position: absolute; width: 7px; height: 7px; border: 1px solid #b7ffff; background: #6cf3ff66; box-shadow: 0 0 16px #6cf3ff99; transform: rotate(45deg); }
.depth-point:nth-child(2) { left: 3%; top: 35%; }
.depth-point:nth-child(3) { right: -3%; top: 17%; width: 5px; height: 5px; }
.depth-point:nth-child(4) { left: 61%; bottom: 5%; border-color: #d8c7ff; box-shadow: 0 0 18px #bca0ff99; }
.pointer-hint { display: none; }
.hero-content { padding-top: 194px; position: relative; z-index: 3; pointer-events: none; }
.hero-content a { pointer-events: auto; }
.eyebrow { display: flex; gap: 10px; align-items: center; font-family: var(--mono); font-size: .75rem; letter-spacing: 2px; color: var(--cyan); font-weight: 400; }
.tiny-cross { font-size: 1.4rem; line-height: 1; }
.hero-kicker { margin-top: 31px; color: #b7c8e5; font-size: .9375rem; letter-spacing: 5px; }
h1 { margin-top: 15px; font-size: clamp(3.25rem, 5.8vw, 5.5rem); line-height: 1.23; letter-spacing: -3px; font-weight: 650; }
h1 > span { color: var(--cyan); background: linear-gradient(115deg, #91f9ff 0%, #a8c3ff 53%, #c4a2ff 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; text-shadow: 0 0 70px #639ffe18; }
.hero-description { color: #bccbe1; font-size: 1rem; line-height: 1.95; margin-top: 27px; max-width: 450px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 30px; margin-top: 33px; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 30px; min-height: 52px; padding: 13px 24px; font-size: .9375rem; font-weight: 600; border-radius: 3px; transition: transform .2s, box-shadow .2s, background .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: linear-gradient(115deg, #78f5ff, #84caff); color: #051322; border: 1px solid #b3fbff; box-shadow: 0 0 25px #6cf3ff18, inset 0 1px 0 #fff8; }
.button-primary:hover { box-shadow: 0 0 36px #6cf3ff40; background: linear-gradient(115deg, #adfaff, #a8d8ff); }
.button > span { font-size: 1.35rem; line-height: 1; }
.button:disabled { opacity: .5; transform: none; box-shadow: none; }
.text-link { display: flex; align-items: center; gap: 11px; color: #d2dff2; font-size: .875rem; }
.text-link:hover { color: var(--cyan); }
.link-orbit { width: 36px; height: 36px; border-radius: 50%; border: 1px solid #afcaff44; display: grid; place-items: center; font-size: 1rem; }
.hero-stage { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; margin-top: 26px; font-size: .75rem; color: #98afd0; }
.hero-stage > span { height: 5px; width: 5px; background: var(--cyan); box-shadow: 0 0 9px var(--cyan); }
.hero-stage > i { width: 1px; height: 11px; background: #647aa35c; margin: 0 3px; }
.ar-viewfinder { position: absolute; right: 4%; left: 48%; top: 21%; bottom: 21%; z-index: 2; pointer-events: none; border: 1px solid #a3caff12; }
.ar-viewfinder > i { position: absolute; width: 27px; height: 27px; border-color: #a1ebffb3; border-style: solid; filter: drop-shadow(0 0 5px #6cf3ff66); }
.ar-viewfinder > i:nth-child(1) { top: -1px; left: -1px; border-width: 1px 0 0 1px; }
.ar-viewfinder > i:nth-child(2) { top: -1px; right: -1px; border-width: 1px 1px 0 0; }
.ar-viewfinder > i:nth-child(3) { bottom: -1px; left: -1px; border-width: 0 0 1px 1px; }
.ar-viewfinder > i:nth-child(4) { bottom: -1px; right: -1px; border-width: 0 1px 1px 0; }
.viewfinder-label { position: absolute; top: -26px; right: 0; color: #a1c7e9; font-family: var(--mono); font-size: .75rem; letter-spacing: 1.4px; }
.viewfinder-anchor { position: absolute; left: 13%; top: 47%; display: flex; gap: 11px; align-items: center; color: #d2faff; background: #08142e99; border: 1px solid #6cf3ff44; padding: 8px 12px; font-size: .75rem; backdrop-filter: blur(12px); transform: translateY(-50%); }
.viewfinder-anchor b { font-size: 1.3rem; font-weight: 300; color: var(--cyan); }
.viewfinder-caption { position: absolute; bottom: 13px; right: 16px; font-family: var(--mono); letter-spacing: 3px; font-size: .75rem; color: #d1dcffbd; }
.scan-beam { position: absolute; left: 0; right: 0; top: 0; height: 18%; opacity: .4; background: linear-gradient(transparent, #6cf3ff0a 88%, #91f8ff69 100%); animation: spatial-scan 7s ease-in-out infinite; }
@keyframes spatial-scan { 0%,100% { transform: translateY(0); opacity: 0; } 15% { opacity: .5; } 75% { opacity: .3; } 90% { transform: translateY(450%); opacity: 0; } }
.hero-bottom { position: absolute; bottom: 31px; left: 0; right: 0; z-index: 4; display: flex; justify-content: space-between; gap: 25px; align-items: center; font-size: .75rem; color: #98aeca; }
.scroll-hint { display: flex; align-items: center; gap: 12px; font-family: var(--mono); letter-spacing: 1.5px; }
.scroll-hint > span { display: grid; place-items: center; width: 26px; height: 38px; border: 1px solid #97caff4d; border-radius: 20px; font-size: 1.125rem; color: var(--cyan); }
.visual-note { font-size: .75rem; color: #a6b8d7; text-align: right; }
.intro-strip { display: grid; grid-template-columns:1.3fr .9fr 1.2fr .8fr; gap: 30px; align-items: center; padding: 35px 0; border-block: 1px solid var(--line); position: relative; }
.intro-strip::before { content: ""; position: absolute; top: -1px; left: 0; width: 140px; height: 1px; background: linear-gradient(90deg,var(--cyan),transparent); }
.strip-label { display: block; color: var(--violet); font-family: var(--mono); font-size: .75rem; letter-spacing: 1.5px; margin-bottom: 9px; }
.intro-strip > p > strong { font-weight: 450; font-size: 1.0625rem; }
.intro-strip > div { padding-left: 30px; border-left: 1px solid var(--line); }
.intro-strip > div > strong { display: flex; align-items: baseline; gap: 8px; font-family: var(--mono); font-size: 2rem; font-weight: 400; line-height: 1.3; color: #e0edff; white-space: nowrap; }
.stat-unit { font-size: .75rem; color: #7692bb; letter-spacing: 1px; }
.intro-strip small { font-size: .875rem; color: #a4bad8; }
.intro-strip > div > span { display: block; font-size: .75rem; color: #8fa8ca; margin-top: 8px; }

/* Interactive AR rules panel. */
.section { padding-block: 110px; }
.section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 32px; margin-bottom: 49px; }
h2 { font-size: clamp(1.75rem, 2.8vw, 2.7rem); font-weight: 550; letter-spacing: -.8px; line-height: 1.5; }
.section-heading h2 { margin-top: 16px; }
.section-aside { color: var(--muted); font-size: .875rem; line-height: 1.85; flex-shrink: 0; }
.play-section { position: relative; }
.play-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 70px; align-items: center; }
.outline-tag { display: inline-block; font-size: .75rem; color: var(--cyan); border: 1px solid #73d5ff40; border-radius: 2px; padding: 4px 10px; background: #50b8ff08; letter-spacing: .5px; }
.play-copy > h3 { font-size: 1.75rem; font-weight: 500; line-height: 1.55; margin: 23px 0 17px; }
.body-copy { font-size: 1rem; color: var(--muted); line-height: 1.9; max-width: 470px; }
.steps { margin-top: 29px; }
.step { width: 100%; display: flex; gap: 18px; align-items: center; text-align: left; padding: 22px 14px; border-top: 1px solid var(--line); background: transparent; color: #a8b8d2; position: relative; transition: background .2s; }
.step::before { position: absolute; content: ""; top: 18px; bottom: 18px; left: 0; width: 2px; background: var(--cyan); opacity: 0; box-shadow: 0 0 16px #6cf3ff88; }
.step.active { background: linear-gradient(90deg, #6cf3ff0d, #9381ff08); color: var(--cyan); border-top-color: #64d8ff40; }
.step.active::before { opacity: 1; }
.step:hover { background: #77a8ff0b; }
.step-number { font-family: var(--mono); font-size: .75rem; align-self: flex-start; padding-top: 3px; }
.step strong { display: block; font-size: 1rem; font-weight: 500; }
.step small { display: block; font-size: .875rem; color: #9aacc9; margin-top: 4px; line-height: 1.7; }
.step-arrow { font-size: 1.3rem; opacity: 0; margin-left: auto; }
.step.active .step-arrow { opacity: 1; }
.arena-card { border: 1px solid #649ede59; border-radius: 6px; padding: 25px; position: relative; overflow: hidden; background: radial-gradient(ellipse at 15% 0%, #1459812b, transparent 60%), linear-gradient(130deg, #0c1b34, #10152d); box-shadow: 0 0 55px #4075e011, inset 0 0 50px #538cd807; }
.arena-card::before { content: ""; position: absolute; top: 0; left: 15%; right: 15%; height: 1px; background: linear-gradient(90deg,transparent,var(--cyan),var(--violet),transparent); }
.arena-top { display: flex; justify-content: space-between; align-items: center; gap: 14px; }
.arena-title { font-family: var(--mono); font-size: .75rem; letter-spacing: .25px; color: #bad7ee; }
.diagram-tag { font-size: .75rem; padding: 3px 8px; border: 1px solid #90a6e64a; background: #8c81ff0b; color: #b8b5f3; border-radius: 2px; }
.arena-readout { display: flex; justify-content: space-between; gap: 12px; font-size: .75rem; color: #adc1dc; margin-top: 28px; }
.arena-readout > span { display: flex; align-items: center; gap: 7px; }
.arena-readout b { font-size: .75rem; font-weight: 400; color: #78b8cd; }
.player-dot { width: 6px; height: 6px; background: var(--cyan); box-shadow: 0 0 9px #6cf3ff66; display: inline-block; border-radius: 50%; }
.arena-readout strong { color: var(--orange); font-family: var(--mono); font-weight: 400; font-size: 1.5rem; line-height: 1; }
.arena-diagram { padding: 47px 18px 29px 28px; margin-top: 7px; position: relative; }
.arena-board { height: 252px; border: 1px solid #589ed67d; background-image: radial-gradient(ellipse at 50% 50%, #3865b21a, transparent 70%), linear-gradient(#76b9ff12 1px, transparent 1px), linear-gradient(90deg,#76b9ff12 1px,transparent 1px); background-size: auto, 10% 16.6667%, 10% 16.6667%; background-color: #0b173d77; box-shadow: 0 0 25px #4381d818, inset 0 0 40px #529be20b; position: relative; isolation: isolate; transition: border-color .3s; }
.board-corner { position: absolute; width: 16px; height: 16px; border-color: var(--cyan); border-style: solid; }
.tl { top: -1px; left: -1px; border-width: 2px 0 0 2px; }
.tr { top: -1px; right: -1px; border-width: 2px 2px 0 0; }
.bl { bottom: -1px; left: -1px; border-width: 0 0 2px 2px; }
.br { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }
.dimension-x { position: absolute; top: 11px; left: 28px; right: 18px; text-align: center; font-size: .75rem; color: #83a7d1; font-family: var(--mono); }
.dimension-x::before, .dimension-x::after { content: ""; display: inline-block; width: 33%; height: 1px; background: #557fb447; vertical-align: middle; margin: 0 10px; }
.dimension-y { position: absolute; left: 0; top: 47%; font-family: var(--mono); font-size: .75rem; color: #83a7d1; writing-mode: vertical-rl; transform: rotate(180deg); }
.board-center { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); color: #64adff60; font-size: 1.8rem; font-weight: 200; }
.board-caption { position: absolute; bottom: 12px; left: 0; right: 0; text-align: center; font-size: .75rem; color: #92aed2; }
.arena-player { width: 44px; height: 44px; border-radius: 50%; position: absolute; top: 50%; transform: translate(-50%,-50%); display: grid; place-items: center; z-index: 3; transition: left .5s ease, transform .35s ease, opacity .4s; }
.arena-player > span { width: 31px; height: 31px; border-radius: 50%; display: grid; place-items: center; font-size: .875rem; font-family: var(--mono); font-weight: 600; }
.player-a { left: 26%; border: 1px solid #6cf3ffb0; background: #6cf3ff17; box-shadow: 0 0 0 7px #6cf3ff08, 0 0 25px #6cf3ff33; }
.player-a > span { background: #8bfbff; color: #092945; }
.player-b { left: 66%; border: 1px solid #ffa9899e; background: #ffaa8820; box-shadow: 0 0 0 7px #ffb18a09, 0 0 25px #ffaa8833; }
.player-b > span { background: #ffc29f; color: #522313; }
.arena-player small { position: absolute; top: 53px; font-size: .75rem; color: #b1dbf1; white-space: nowrap; }
.player-b small { color: #edc3ac; }
.range-ring { position: absolute; top: 50%; left: 26%; width: 36%; aspect-ratio: 1; border-radius: 50%; border: 1px dashed #72daff88; transform: translate(-50%,-50%); background: #6ccaff09; transition: left .5s; box-shadow: 0 0 30px #4896ff0b; }
.hit-effect { position: absolute; top: 50%; left: 74%; font-size: 3.75rem; line-height: 1; color: #ffe2c3; opacity: 0; transform: translate(-50%,-50%) scale(.3); z-index: 4; }
.hit-effect.burst { animation: hit .45s ease-out; }
@keyframes hit { 0% { opacity: 1; transform: translate(-50%,-50%) scale(.4); } 100% { opacity: 0; transform: translate(-50%,-50%) scale(1.6); } }
.arena-player.is-hit { transform: translate(-50%,-80%) scale(1.15); }
.arena-board.ring-out { border-right: 1px dashed var(--orange); }
.win-banner { position: absolute; inset: 0; z-index: 6; display: flex; flex-direction: column; align-items: center; justify-content: center; background: #0b1734e8; backdrop-filter: blur(8px); }
.win-banner > span { font-size: .75rem; color: var(--cyan); font-family: var(--mono); letter-spacing: 2px; }
.win-banner > strong { font-size: 2.15rem; font-weight: 500; margin: 7px 0; }
.win-banner > p { font-size: .875rem; color: var(--muted); }
.arena-status { min-height: 75px; padding-top: 17px; border-top: 1px solid var(--line); font-size: .875rem; line-height: 1.8; color: #bacce5; }
.arena-controls { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.arena-controls .button { font-size: .875rem; padding: 10px 14px; min-height: 45px; gap: 13px; }
.button-ghost { background: #6cf3ff0c; border: 1px solid #6cf3ff43; color: var(--cyan); }
.button-ghost:hover { background: #6cf3ff1c; }
.reset-button { min-width: 44px; min-height: 44px; display: flex; gap: 5px; align-items: center; justify-content: center; background: transparent; color: #a8bfdf; font-size: 1.45rem; padding: 8px 0 8px 8px; margin-left: auto; }
.reset-button > span { font-size: .875rem; }
.diagram-note { font-size: .75rem; line-height: 1.8; color: #91a5c6; margin-top: 15px; }
.play-baseline { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; padding: 24px 0; margin-top: 43px; border-block: 1px solid var(--line); color: #a1b4d2; font-size: .75rem; }
.play-baseline > span:first-child { color: #d7e5fb; font-size: .875rem; }
.play-baseline > p::before { content: "+"; color: var(--cyan); margin-right: 9px; }
.baseline-note { margin-left: auto; color: #a0a2d6; }
.game-details { border-bottom: 1px solid var(--line); color: var(--muted); font-size: .875rem; }
.game-details summary { list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 20px; cursor: pointer; padding: 21px 0; }
.game-details summary::-webkit-details-marker { display: none; }
.game-details summary > span { color: var(--cyan); transition: transform .2s; }
.game-details[open] summary > span { transform: rotate(45deg); }
.details-body { display: grid; grid-template-columns: repeat(3,1fr); gap: 30px; padding-bottom: 27px; line-height: 1.9; }

/* Image-led MR scene gallery. */
.visual-connection { padding-top: 84px; }
.visual-connection .section-heading { margin-bottom: 32px; }
.visual-connection h2 { font-size: clamp(2rem, 3.1vw, 3rem); }
.visual-connection h2 > span { color: #b2c2ff; }
.scene-gallery { scroll-margin-top: 32px; }
.scene-panel { position: relative; height: clamp(520px, 51vw, 720px); isolation: isolate; overflow: hidden; border: 1px solid #819eed40; background: #0c1730; border-radius: 5px; }
.scene-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; }
.scene-panel::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(0deg, #030815f2 0%, #03081599 19%, transparent 55%), linear-gradient(180deg, #03081555, transparent 25%); pointer-events: none; }
.scene-concept { position: absolute; top: 24px; left: 28px; font-size: .75rem; color: #d2e5f7; padding: 5px 11px; border: 1px solid #b5d5f73b; background: #05102280; backdrop-filter: blur(10px); }
.scene-caption { position: absolute; bottom: 42px; left: 42px; right: 120px; }
.scene-caption .eyebrow { font-size: .75rem; letter-spacing: 1.4px; }
.scene-caption h3 { font-size: clamp(1.8rem, 3vw, 2.8rem); line-height: 1.4; font-weight: 550; letter-spacing: -.7px; margin-top: 13px; }
.scene-caption > p:last-child { color: #bccae0; font-size: 1rem; margin-top: 13px; }
.scene-index { position: absolute; right: 36px; bottom: 47px; font-family: var(--mono); color: #91aecb; font-size: .75rem; letter-spacing: 2px; }
.scene-tabs { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 14px; margin-top: 17px; }
.scene-tab { position: relative; padding: 0; background: #0b1429; border: 1px solid #7d98c843; border-radius: 3px; overflow: hidden; aspect-ratio: 1.7; isolation: isolate; text-align: left; }
.scene-tab img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; opacity: .78; transition: transform .5s ease, opacity .3s; }
.scene-tab::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(transparent 20%,#040918eb); }
.scene-tab-label { position: absolute; inset: auto 16px 14px; display: flex; align-items: center; gap: 10px; color: #dce9f9; }
.scene-tab-label small { font-family: var(--mono); color: #9ab5d6; font-size: .75rem; }
.scene-tab-label strong { font-weight: 500; font-size: 1rem; }
.scene-tab-label > span { margin-left: auto; font-size: 1.25rem; color: var(--cyan); }
.scene-tab[aria-selected="true"] { border-color: var(--cyan); box-shadow: 0 0 0 1px #6cf3ff22, 0 0 24px #6cf3ff12; }
.scene-tab[aria-selected="true"] img { opacity: 1; }
.scene-tab[aria-selected="true"] .scene-tab-label { color: var(--cyan); }
@media (hover: hover) and (pointer: fine) {
  html[data-motion="running"] .scene-tab:hover img { transform: scale(1.07); opacity: 1; }
}
.gallery-note { font-size: .75rem; color: #91a9c7; margin-top: 17px; text-align: right; }
.demo-section { border-top: 1px solid var(--line); padding-top: 84px; }
.demo-section .section-heading { margin-bottom: 30px; }
.demo-section h2 > span { color: #b2c2ff; }
.demo-frame { position: relative; isolation: isolate; border: 1px solid #78a9e65c; border-radius: 5px; overflow: hidden; background: #061025; box-shadow: 0 0 45px #4b84d412, inset 0 0 36px #6cf3ff0b; }
.demo-frame::before { content: "UTOPIA WORLD / DEMO REEL"; position: absolute; z-index: 2; left: 22px; top: 19px; padding: 5px 9px; border: 1px solid #c7e9ff3c; background: #0410269c; color: #c9e9ff; font-family: var(--mono); font-size: .6875rem; letter-spacing: 1.2px; pointer-events: none; }
.demo-frame video { display: block; width: 100%; height: auto; aspect-ratio: 1204 / 540; object-fit: cover; background: #050a18; }
.demo-frame-corners { position: absolute; inset: 14px; pointer-events: none; z-index: 2; }
.demo-frame-corners i { position: absolute; width: 26px; height: 26px; border-color: #9adfffaa; border-style: solid; filter: drop-shadow(0 0 6px #6cf3ff66); }
.demo-frame-corners i:nth-child(1) { left: 0; top: 0; border-width: 1px 0 0 1px; }
.demo-frame-corners i:nth-child(2) { right: 0; top: 0; border-width: 1px 1px 0 0; }
.demo-frame-corners i:nth-child(3) { left: 0; bottom: 0; border-width: 0 0 1px 1px; }
.demo-frame-corners i:nth-child(4) { right: 0; bottom: 0; border-width: 0 1px 1px 0; }
.demo-caption { display: flex; align-items: center; gap: 12px; margin-top: 14px; color: #91a9c7; font-size: .75rem; }
.demo-caption p { margin: 0; }
.demo-caption .text-link { margin-left: auto; color: #aac4e3; font-size: .75rem; }
.demo-caption .text-link:hover { color: var(--cyan); }
.demo-pulse { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }
.play-section { border-top: 1px solid var(--line); }
.game-details .play-baseline { border-top: 0; margin-top: 0; }

/* A timeline, not a promise that future features are already live. */
.journey-section { border-top: 1px solid var(--line); padding-top: 85px; }
.journey-track { display: grid; grid-template-columns: repeat(4,1fr); margin-top: 20px; gap: 0; }
.journey-item { position: relative; padding: 0 25px 0 0; }
.journey-item:not(:first-child) { padding-left: 25px; }
.journey-item::before { content: ""; position: absolute; left: 0; right: 0; top: 22px; height: 1px; background: linear-gradient(90deg,#609feb80,#8e76cf77); }
.journey-number { display: grid; place-items: center; width: 44px; height: 44px; border: 1px solid #5d7bab; background: var(--bg); color: #a5b8d6; font-family: var(--mono); font-size: .875rem; position: relative; margin-bottom: 29px; border-radius: 3px; }
.current .journey-number { color: #072038; background: var(--cyan); border-color: #b3faff; box-shadow: 0 0 22px #6cf3ff30; }
.journey-state { font-size: .75rem; color: #a69dd5; }
.current .journey-state { color: var(--cyan); }
.journey-item h3 { font-size: 1.3rem; font-weight: 500; margin: 10px 0 15px; }
.journey-item > p:not(.journey-state) { font-size: 1rem; color: var(--muted); line-height: 1.85; }
.journey-item small { font-size: .75rem; color: #8fa3c5; margin-top: 23px; display: block; line-height: 1.85; }
.closing-section { position: relative; overflow: hidden; padding: 106px 0 34px; border-top: 1px solid #8caff52b; text-align: center; background: radial-gradient(ellipse at 50% 120%,#3561bf4a,transparent 65%), radial-gradient(ellipse at 10% 30%,#752eb51c,transparent 55%); }
.closing-section::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(#8bc8ff0a 1px,transparent 1px), linear-gradient(90deg,#8bc8ff0a 1px,transparent 1px); background-size: 64px 64px; mask-image: linear-gradient(transparent,black); pointer-events: none; }
.closing-section .wrap { position: relative; }
.closing-section .eyebrow { justify-content: center; color: #a3b8e0; font-size: .75rem; }
.closing-section h2 { margin: 26px 0 21px; font-size: clamp(1.9rem,3.25vw,3rem); line-height: 1.6; font-weight: 500; }
.closing-section h2 > span { color: #b0c3ff; }
.closing-section .wrap > p:not(.eyebrow) { font-size: 1rem; color: #acbbd5; }
.closing-section .button { margin-top: 30px; }
.closing-note { display: flex; justify-content: space-between; gap: 20px; margin-top: 90px; font-family: var(--mono); color: #8b9fc3; font-size: .75rem; letter-spacing: 1px; }
.site-footer { display: flex; justify-content: space-between; align-items: center; gap: 22px; padding-block: 39px; border-top: 1px solid var(--line); color: #8ea3c3; font-size: .75rem; }
.footer-brand { font-family: var(--mono); font-size: .9375rem; letter-spacing: 2px; color: #d8e7fd; font-weight: 600; line-height: 1.5; }
.footer-brand > span { display: block; font-family: "PingFang SC",sans-serif; font-size: .75rem; letter-spacing: 3px; font-weight: 400; color: #9aaecb; margin-top: 4px; }
.site-footer > p { font-size: .875rem; color: #b9cbe8; }
.site-footer > a:last-child { white-space: nowrap; }

/* Android download entry. The file is optional during development and becomes
   active automatically after the APK is uploaded to dist/downloads/. */
.download-section { border-top: 1px solid var(--line); padding-top: 72px; }
.download-card { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(250px, .75fr); gap: 55px; align-items: stretch; padding: 42px; border: 1px solid #6cf3ff3f; border-radius: 5px; background: radial-gradient(circle at 10% 0%, #2b7da62b, transparent 50%), linear-gradient(125deg, #0c1f3b, #171333); box-shadow: inset 0 0 55px #6d83ff0b, 0 0 40px #4a8ee50b; position: relative; overflow: hidden; }
.download-card::after { content: "APK"; position: absolute; right: 24px; top: 17px; font-family: var(--mono); letter-spacing: 2px; font-size: .6875rem; color: #9ccfff70; }
.download-copy .eyebrow { color: var(--cyan); }
.download-copy h2 { margin: 16px 0 13px; font-size: clamp(1.8rem, 3vw, 2.6rem); }
.download-copy > p:not(.eyebrow) { max-width: 610px; color: #b4c9e5; font-size: .9375rem; line-height: 1.9; }
.download-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 17px; margin-top: 27px; }
.download-actions .button { min-width: 216px; }
.button.is-disabled { opacity: .48; filter: saturate(.55); cursor: not-allowed; box-shadow: none; }
.button.is-disabled:hover { transform: none; background: linear-gradient(115deg, #78f5ff, #84caff); }
.apk-status { min-height: 1.5em; color: #97afd0; font-size: .75rem; line-height: 1.6; }
.download-meta { display: flex; flex-direction: column; justify-content: center; align-items: flex-start; gap: 12px; padding-left: 40px; border-left: 1px solid #78b9ee2c; color: #a8bfde; }
.download-meta strong { font-family: var(--mono); letter-spacing: 2px; color: #d7e8ff; font-size: .8125rem; }
.download-meta > span:not(.download-orbit) { font-size: .875rem; }
.download-meta small { max-width: 260px; color: #8da6c7; line-height: 1.75; font-size: .75rem; }
.download-orbit { width: 51px; height: 51px; display: grid; place-items: center; border: 1px solid #6cf3ff86; border-radius: 50%; color: var(--cyan); font-size: 1.4rem; box-shadow: 0 0 26px #6cf3ff20, inset 0 0 18px #6cf3ff12; }
.contact-section { border-top: 1px solid var(--line); padding-top: 72px; }
.contact-section .section-heading { margin-bottom: 30px; }
.contact-section h2 > span { color: #b2c2ff; }
.contact-card { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(260px, .7fr); gap: 65px; align-items: center; padding: 42px 55px; border: 1px solid #9a8cff3b; border-radius: 5px; background: radial-gradient(circle at 88% 10%, #7f6cff18, transparent 45%), linear-gradient(125deg, #101a38, #1b1436); box-shadow: inset 0 0 55px #8274ff0c, 0 0 40px #5d55d20b; position: relative; overflow: hidden; }
.contact-card::before { content: "WECHAT / CONTACT"; position: absolute; top: 20px; left: 23px; color: #b8b1f470; font-family: var(--mono); font-size: .6875rem; letter-spacing: 1.3px; }
.contact-copy { padding-top: 13px; }
.contact-copy h3 { margin: 21px 0 15px; font-size: clamp(1.7rem, 3vw, 2.45rem); font-weight: 500; line-height: 1.45; }
.contact-copy > p:not(.contact-note) { max-width: 560px; color: #b6c6e2; font-size: .9375rem; line-height: 1.9; }
.contact-facts { display: flex; flex-wrap: wrap; gap: 34px; margin-top: 28px; padding-top: 20px; border-top: 1px solid #8998e52e; }
.contact-facts div { display: flex; flex-direction: column; gap: 6px; }
.contact-facts small { color: #8fa7c7; font-size: .75rem; }
.contact-facts strong { color: #dceaff; font-size: 1rem; font-weight: 500; }
.contact-note { display: flex; align-items: center; gap: 9px; margin-top: 28px; color: #9badd0; font-size: .75rem; line-height: 1.7; }
.contact-note > span { color: var(--cyan); font-size: 1rem; }
.contact-qr { justify-self: center; width: min(100%, 260px); margin: 0; padding: 14px 14px 18px; border: 1px solid #aac3ff52; border-radius: 4px; background: #f9fbff; box-shadow: 0 0 35px #8e83ff25; }
.contact-qr img { display: block; width: 100%; height: auto; aspect-ratio: 958 / 1415; object-fit: cover; }
.contact-qr figcaption { padding-top: 13px; color: #34456a; text-align: center; font-size: .75rem; letter-spacing: .3px; }

/* Progressive enhancement: content remains visible without JavaScript. */
.motion-ready .reveal-block { opacity: 0; transform: translateY(22px); transition: opacity .65s ease, transform .65s ease; }
.motion-ready .reveal-block.is-visible { opacity: 1; transform: none; }
/* Each plane travels at its own depth; text and controls stay anchored. */
@media (min-width: 761px) and (hover: hover) and (pointer: fine) {
  .hero-art { transform: translate3d(calc(var(--scene-x, 0) * -44px), calc(var(--scene-y, 0) * -30px), 0) scale(1.14); will-change: transform; }
  .hero-grid { transform: translate3d(calc(var(--scene-x, 0) * -14px), calc(var(--scene-y, 0) * -10px), 0) scale(1.04); }
  .ar-viewfinder { transform: perspective(1100px) translate3d(calc(var(--scene-x, 0) * 26px), calc(var(--scene-y, 0) * 20px), 0) rotateX(calc(var(--scene-y, 0) * -7deg)) rotateY(calc(var(--scene-x, 0) * 9deg)); will-change: transform; }
  .hero-light { display: block; opacity: calc(var(--scene-active, 0) * .9); transform: translate(-50%, -50%) translate3d(calc(var(--scene-x, 0) * 180px), calc(var(--scene-y, 0) * 110px), 0); will-change: transform, opacity; }
  .spatial-depth { display: block; opacity: calc(var(--scene-active, 0) * .8); transform: perspective(900px) translate3d(calc(var(--scene-x, 0) * 58px), calc(var(--scene-y, 0) * 38px), 0) rotateX(calc(var(--scene-y, 0) * -10deg)) rotateY(calc(var(--scene-x, 0) * 12deg)); will-change: transform, opacity; }
  .pointer-hint { display: block; }
}
html[data-motion="paused"] { scroll-behavior: auto; }
html[data-motion="paused"] .scan-beam { animation-play-state: paused; }
html[data-motion="paused"] .hero-art, html[data-motion="paused"] .ar-viewfinder, html[data-motion="paused"] .hero-grid { transform: none; transition: none; will-change: auto; }
html[data-motion="paused"] .hero-light, html[data-motion="paused"] .spatial-depth { opacity: 0; will-change: auto; }
html[data-motion="paused"] .reveal-block { opacity: 1; transform: none; transition: none; }

@media (min-width: 1700px) {
  .hero-content { padding-top: 195px; }
  .arena-board { height: 287px; }
}
@media (max-width: 1200px) {
  .wrap { width: calc(100% - 72px); }
  .site-header { padding-inline: 32px; gap: 18px; }
  .site-header nav { gap: 22px; }
  .header-actions { gap: 17px; }
  .motion-toggle > span { display: none; }
  .motion-toggle { min-width: 32px; }
  .header-cta { padding: 10px 15px; gap: 18px; }
  .hero-content { padding-top: 182px; }
  .hero { min-height: 800px; }
  .hero-kicker { margin-top: 28px; }
  h1 { font-size: 4.2rem; }
  .hero-shade { background: linear-gradient(90deg,#050b18ee,#050b18aa 32%,transparent 75%),linear-gradient(0deg,var(--bg),transparent 40%); }
  .ar-viewfinder { left: 48%; top: 23%; bottom: 24%; }
  .viewfinder-anchor { top: 37%; left: 7%; }
  .intro-strip { gap: 20px; }
  .intro-strip > div { padding-left: 20px; }
  .intro-strip > div > strong { font-size: 1.75rem; }
  .play-layout { gap: 40px; grid-template-columns: 1fr 1.12fr; }
  .arena-card { padding: 21px; }
  .arena-top { flex-wrap: wrap; gap: 10px; }
  .reset-button > span { display: none; }
  .arena-controls .button { gap: 8px; padding-inline: 12px; }
  .arena-board { height: 234px; }
  .journey-item { padding-right: 17px; }
  .journey-item:not(:first-child) { padding-left: 17px; }
  .journey-item h3 { font-size: 1.1875rem; }
  .play-baseline { gap: 14px 22px; }
  .baseline-note { margin-left: 0; }
}
@media (max-width: 960px) and (min-width: 761px) {
  .brand { font-size: 1rem; gap: 8px; }
  .brand small { letter-spacing: 1px; }
  .brand-mark { width: 31px; }
  .site-header nav { gap: 15px; font-size: .8125rem; }
  .header-cta { padding-inline: 10px; gap: 10px; font-size: .8125rem; }
  .header-actions { gap: 12px; }
  .hero-content { padding-top: 175px; }
  h1 { font-size: 3.8rem; }
  .hero-actions { gap: 20px; }
  .hero-bottom > p { display: none; }
  .ar-viewfinder { left: 53%; top: 25%; }
  .viewfinder-anchor { display: none; }
  .viewfinder-label { font-size: .75rem; letter-spacing: 0; }
  .intro-strip { grid-template-columns: 1fr 1fr 1.3fr .8fr; gap: 15px; }
  .intro-strip .stat-unit { display: none; }
  .intro-strip > p > strong { font-size: .9375rem; }
  .strip-label { letter-spacing: 0; }
  .play-layout { grid-template-columns: 1fr; gap: 30px; }
  .play-copy { display: grid; grid-template-columns: 1fr 1fr; gap: 0 30px; }
  .play-copy > .outline-tag { justify-self: start; }
  .play-copy .steps { grid-column: 2; grid-row: 1 / 4; margin-top: 0; }
  .arena-card { max-width: 620px; width: 100%; margin-inline: auto; }
  .arena-top { flex-wrap: nowrap; }
  .arena-board { height: 270px; }
  .journey-track { grid-template-columns: 1fr 1fr; gap: 35px 0; }
  .journey-item:nth-child(3) { padding-left: 0; }
  .site-footer { flex-wrap: wrap; }
}
@media (max-width: 760px) {
  html { scroll-padding-top: 28px; }
  .wrap { width: calc(100% - 40px); }
  .site-header { height: 84px; padding: 0 20px; gap: 10px; }
  .brand { font-size: 1rem; gap: 9px; letter-spacing: 1px; }
  .brand small { font-size: .75rem; letter-spacing: 1px; }
  .brand-mark { width: 30px; height: 36px; }
  .site-header nav, .header-cta { display: none; }
  .header-actions { margin-left: auto; gap: 0; }
  .motion-toggle { padding: 8px; min-width: 40px; }
  .motion-toggle > span { display: none; }
  .menu-toggle { display: flex; flex-direction: column; justify-content: center; gap: 7px; padding: 10px 6px; background: transparent; width: 40px; height: 44px; }
  .menu-toggle > span { width: 25px; height: 1px; display: block; background: #d8e8ff; transition: transform .2s; }
  .menu-toggle[aria-expanded="true"] > span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] > span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .hero { height: auto; min-height: 1000px; padding-bottom: 413px; }
  .hero-content { padding-top: 129px; }
  .eyebrow { font-size: .75rem; letter-spacing: 1px; }
  .tiny-cross { font-size: 1.25rem; }
  .hero-kicker { margin-top: 25px; font-size: .875rem; letter-spacing: 3px; }
  h1 { font-size: clamp(2.75rem,12vw,4rem); letter-spacing: -1.5px; line-height: 1.3; margin-top: 15px; }
  .hero-description { font-size: 1rem; margin-top: 24px; line-height: 1.9; max-width: 100%; }
  .hero-actions { gap: 21px; margin-top: 27px; }
  .button { min-height: 49px; padding: 12px 18px; gap: 22px; font-size: .875rem; }
  .text-link { font-size: .875rem; gap: 8px; }
  .link-orbit { width: 29px; height: 29px; }
  .hero-stage { margin-top: 22px; gap: 7px; font-size: .75rem; }
  .hero-art { inset: auto 0 15px; height: 530px; object-position: right center; transform: none; }
  .hero-shade { background: linear-gradient(0deg,var(--bg) 0%,#05081600 14%,#05081600 31%,#050816d9 48%,var(--bg) 57%); }
  .hero-grid { inset: 84px 0 300px; background-size: 55px 55px; opacity: .2; mask-image: linear-gradient(black,transparent); }
  .ar-viewfinder { top: auto; bottom: 105px; left: 22px; right: 22px; height: 290px; transform: none; }
  .viewfinder-label { top: -25px; font-size: .75rem; letter-spacing: .6px; }
  .viewfinder-anchor { top: 45%; left: 5%; font-size: .75rem; padding: 5px 9px; }
  .viewfinder-caption { font-size: .75rem; letter-spacing: 2px; right: 10px; bottom: 10px; }
  .hero-bottom { bottom: 27px; align-items: center; gap: 20px; }
  .hero-bottom > p { display: none; }
  .scroll-hint { font-size: .75rem; letter-spacing: 0; gap: 8px; }
  .scroll-hint > span { width: 23px; height: 32px; }
  .visual-note { font-size: .75rem; max-width: 133px; line-height: 1.6; }
  .intro-strip { grid-template-columns: 1fr 1fr; padding-block: 27px; gap: 27px 18px; }
  .intro-strip > p > strong { font-size: 1rem; }
  .strip-label { letter-spacing: .5px; font-size: .75rem; }
  .intro-strip > div { padding-left: 19px; }
  .intro-strip > div:nth-child(3) { border: 0; padding-left: 0; }
  .intro-strip > div > strong { font-size: 1.75rem; gap: 7px; }
  .stat-unit { font-size: .75rem; letter-spacing: 0; }
  .section { padding-block: 69px; }
  .section-heading { display: block; margin-bottom: 32px; }
  .section-heading h2 { font-size: 1.7rem; margin-top: 15px; line-height: 1.55; }
  .section-aside { font-size: .875rem; margin-top: 15px; }
  .section-aside br { display: none; }
  .play-layout { grid-template-columns: 1fr; gap: 29px; }
  .play-copy > h3 { font-size: 1.65rem; margin: 20px 0 15px; }
  .body-copy { max-width: none; font-size: 1rem; }
  .steps { margin-top: 25px; }
  .step { padding: 19px 13px; gap: 15px; }
  .step strong { font-size: .9375rem; }
  .step small { font-size: .875rem; }
  .step-arrow { font-size: 1.2rem; }
  .arena-card { padding: 19px 16px; }
  .arena-top { flex-wrap: wrap; gap: 10px; }
  .arena-title { font-size: .75rem; }
  .diagram-tag { font-size: .75rem; }
  .arena-readout { margin-top: 24px; font-size: .75rem; }
  .arena-readout > span { gap: 5px; }
  .arena-diagram { padding: 43px 12px 25px 24px; }
  .dimension-x { left: 24px; right: 12px; }
  .dimension-x::before,.dimension-x::after { width: 27%; }
  .arena-board { height: 224px; }
  .arena-player { width: 40px; height: 40px; }
  .arena-player > span { width: 29px; height: 29px; }
  .arena-player small { top: 49px; font-size: .75rem; }
  .arena-status { min-height: 77px; font-size: .875rem; }
  .arena-controls { gap: 8px; }
  .arena-controls .button { padding: 10px 12px; font-size: .875rem; gap: 9px; }
  .diagram-note { font-size: .75rem; }
  .reset-button > span { display: none; }
  .play-baseline { margin-top: 28px; gap: 12px 17px; padding-block: 21px; }
  .play-baseline > span:first-child { width: 100%; }
  .baseline-note { width: 100%; margin-top: 2px; }
  .game-details summary { font-size: .875rem; }
  .details-body { grid-template-columns: 1fr; gap: 15px; font-size: .875rem; }
  .desktop-break { display: none; }
  .journey-track { grid-template-columns: 1fr; gap: 0; margin-top: 0; }
  .journey-item,.journey-item:not(:first-child) { padding: 0 0 35px 65px; min-height: 195px; }
  .journey-item::before { left: 21px; top: 22px; bottom: 0; right: auto; width: 1px; height: auto; background: linear-gradient(var(--cyan),#927bdd66); }
  .journey-item:last-child { min-height: 0; padding-bottom: 0; }
  .journey-item:last-child::before { display: none; }
  .journey-number { position: absolute; left: 0; top: 0; width: 43px; height: 43px; font-size: .875rem; }
  .journey-item h3 { font-size: 1.3125rem; margin: 8px 0 12px; }
  .journey-item > p:not(.journey-state) { font-size: 1rem; }
  .journey-item small { font-size: .75rem; margin-top: 16px; }
  .closing-section { padding-top: 70px; padding-bottom: 29px; }
  .closing-section .eyebrow { font-size: .75rem; letter-spacing: .3px; }
  .closing-section h2 { font-size: 1.6rem; letter-spacing: -.8px; line-height: 1.75; margin: 25px 0 18px; }
  .closing-section .wrap > p:not(.eyebrow) { font-size: .875rem; }
  .closing-note { justify-content: center; font-size: .75rem; letter-spacing: 0; margin-top: 62px; }
  .closing-note > span:last-child { display: none; }
  .site-footer { display: grid; grid-template-columns:1fr auto; gap: 23px 15px; padding-block: 31px; }
  .footer-brand { font-size: .875rem; }
  .site-footer > p { grid-column: 1; grid-row: 2; font-size: .875rem; }
  .site-footer > span { grid-column: 1/-1; grid-row: 3; font-size: .75rem; }
  .site-footer > a:last-child { grid-column: 2; grid-row: 2; }
}
@media (max-width: 370px) {
  .site-header { padding-inline: 15px; }
  .brand { gap: 6px; font-size: .9375rem; }
  .brand small { letter-spacing: .5px; }
  .hero { min-height: 1060px; }
  .hero-actions { gap: 16px; }
  .hero-actions .button { padding-inline: 16px; gap: 17px; }
  .hero-actions .text-link { min-height: 40px; }
  .hero-stage > i { display: none; }
  .ar-viewfinder { bottom: 105px; height: 275px; }
  .intro-strip .stat-unit { display: none; }
  .intro-strip > div > strong { font-size: 1.55rem; }
  .intro-strip > p > strong { font-size: .9375rem; }
  .arena-card { padding-inline: 12px; }
  .arena-controls .button { padding-inline: 10px; }
  .arena-controls { column-gap: 6px; }
  .reset-button { padding-left: 0; }
  .closing-section h2 { font-size: 1.4rem; }
}
/* A narrow desktop preview still responds to a mouse; touch phones stay still. */
@media (max-width: 760px) and (hover: hover) and (pointer: fine) {
  html[data-motion="running"] .hero-art { transform: translate3d(calc(var(--scene-x, 0) * -14px), calc(var(--scene-y, 0) * -14px), 0) scale(1.12); will-change: transform; }
  html[data-motion="running"] .ar-viewfinder { transform: perspective(900px) translate3d(calc(var(--scene-x, 0) * 9px), calc(var(--scene-y, 0) * 7px), 0) rotateX(calc(var(--scene-y, 0) * -4deg)) rotateY(calc(var(--scene-x, 0) * 5deg)); will-change: transform; }
  .spatial-depth { display: block; top: auto; bottom: 110px; height: 260px; left: 24px; right: 24px; opacity: calc(var(--scene-active, 0) * .8); transform: perspective(900px) translate3d(calc(var(--scene-x, 0) * 18px), calc(var(--scene-y, 0) * 12px), 0) rotateY(calc(var(--scene-x, 0) * 6deg)); }
}
@media (prefers-reduced-motion: reduce) {
  html:not([data-motion="running"]) { scroll-behavior: auto; }
  html:not([data-motion="running"]) *, html:not([data-motion="running"]) *::before, html:not([data-motion="running"]) *::after { animation: none !important; transition: none !important; }
  html:not([data-motion="running"]) .hero-art,html:not([data-motion="running"]) .ar-viewfinder,html:not([data-motion="running"]) .hero-grid { transform: none; }
  html:not([data-motion="running"]) .hero-light,html:not([data-motion="running"]) .spatial-depth { opacity: 0; }
  html:not([data-motion="running"]) .reveal-block { opacity: 1; transform: none; }
}

/* Compact narrative, larger pictures. */
.play-copy > .body-copy { max-width: 380px; }
.journey-section { padding-block: 72px; }
.journey-item small { margin-top: 8px; }
.closing-section { padding: 70px 0 76px; }
.closing-section h2 { margin-bottom: 0; }
.closing-section h2 > span { margin-left: .3em; }
@media (max-width: 960px) {
  .scene-panel { height: 540px; }
  .scene-tabs { gap: 10px; }
  .scene-tab-label { inset: auto 10px 10px; gap: 7px; }
  .scene-tab-label strong { font-size: .875rem; }
  .scene-caption { left: 30px; bottom: 33px; }
  .scene-caption h3 { font-size: 2rem; }
  .download-card { gap: 32px; padding: 32px; }
  .download-meta { padding-left: 28px; }
  .contact-card { gap: 35px; padding: 34px; }
  .contact-qr { width: min(100%, 230px); }
}
@media (max-width: 760px) {
  .visual-connection { padding-top: 56px; }
  .visual-connection h2 { font-size: 1.75rem; line-height: 1.55; }
  .visual-connection h2 > span { display: block; }
  .visual-connection .section-heading { margin-bottom: 25px; }
  .scene-panel { height: auto; border-radius: 3px; }
  .scene-panel::after { display: none; }
  .scene-image { position: relative; height: auto; aspect-ratio: 1659 / 948; object-fit: contain; z-index: 0; }
  .scene-concept { top: 16px; left: 16px; padding: 4px 8px; font-size: .75rem; }
  .scene-caption { position: relative; left: auto; right: auto; bottom: auto; padding: 22px 20px 25px; }
  .scene-caption h3 { font-size: 1.5rem; margin-top: 12px; line-height: 1.5; }
  .scene-caption > p:last-child { font-size: .875rem; margin-top: 9px; }
  .scene-caption .eyebrow { letter-spacing: .5px; }
  .scene-index { display: none; }
  .scene-tabs { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; margin-top: 12px; }
  .scene-tab { aspect-ratio: 1.35; }
  .scene-tab-label { inset: auto 10px 10px; gap: 7px; }
  .scene-tab-label > span { font-size: 1rem; }
  .gallery-note { text-align: left; font-size: .75rem; }
  .demo-section { padding-top: 56px; }
  .demo-section .section-heading { margin-bottom: 25px; }
  .demo-frame { border-radius: 3px; }
  .demo-frame::before { left: 14px; top: 13px; font-size: .625rem; letter-spacing: .6px; }
  .demo-frame-corners { inset: 9px; }
  .demo-frame-corners i { width: 19px; height: 19px; }
  .demo-caption { align-items: flex-start; flex-wrap: wrap; gap: 8px; line-height: 1.6; }
  .demo-caption .text-link { width: 100%; margin-left: 18px; }
  .download-section { padding-top: 56px; }
  .download-card { grid-template-columns: 1fr; gap: 30px; padding: 26px 21px; }
  .download-copy h2 { font-size: 1.75rem; }
  .download-copy > p:not(.eyebrow) { font-size: .875rem; }
  .download-actions { align-items: flex-start; flex-direction: column; gap: 11px; }
  .download-actions .button { width: 100%; }
  .download-meta { align-items: flex-start; padding: 26px 0 0; border-left: 0; border-top: 1px solid #78b9ee2c; }
  .contact-section { padding-top: 56px; }
  .contact-section .section-heading { margin-bottom: 25px; }
  .contact-card { grid-template-columns: 1fr; gap: 27px; padding: 32px 21px 26px; }
  .contact-card::before { top: 15px; left: 16px; font-size: .625rem; letter-spacing: .7px; }
  .contact-copy { padding-top: 7px; }
  .contact-copy h3 { font-size: 1.55rem; margin-top: 18px; }
  .contact-copy > p:not(.contact-note) { font-size: .875rem; }
  .contact-facts { gap: 24px; margin-top: 22px; padding-top: 16px; }
  .contact-note { margin-top: 21px; }
  .contact-qr { width: min(100%, 260px); }
  .play-copy > h3 { font-size: 1.5rem; }
  .step { padding-block: 21px; }
  .journey-item,.journey-item:not(:first-child) { min-height: 145px; padding-bottom: 26px; }
  .journey-section { padding-block: 58px; }
  .closing-section { padding-block: 60px; }
  .closing-section h2 > span { display: block; margin-left: 0; }
}
@media (max-width: 370px) {
  .scene-caption { padding-inline: 16px; }
  .scene-caption h3 { font-size: 1.4rem; }
  .scene-tab-label small { display: none; }
}