/* Building to the Sky: the website. One stylesheet for every page.
   The palette follows the game's drawing styles (data/view_styles.json): the blueprint's blue sheet and green drafting
   mat, the CAD drawing's charcoal sheet and its ruled paper, and the warm yellow of the store page's banners. */

:root {
  --night: #0b1220;
  --night-2: #101a2c;
  --night-3: #16233a;
  --night-4: #1d2d4a;
  --line: rgba(214, 228, 255, 0.12);
  --line-strong: rgba(214, 228, 255, 0.24);
  --text: #e9eef6;
  --text-dim: #aab6c9;
  --text-faint: #7f8ba0;
  --gold: #ffd76a;
  --gold-deep: #e8b73a;
  --cream: #ffe9b0;
  --on-gold: #1b1a12;
  --bp-paper: #1f4c8a;
  --bp-deep: #143a70;
  --bp-grid: #6f9ad8;
  --bp-ink: #eef5ff;
  --mat: #27584a;
  --mat-deep: #1f4a3d;
  --mat-line: #a9d1bd;
  --mat-edge: #163b30;
  --mat-text: #f3eedb;
  --mat-dim: #c5d8cb;
  --tape: #e8dcb8;
  --mark: #efd27a;
  --paper: #e9e3d3;
  --paper-line: #b7c5d4;
  --paper-margin: #d48a82;
  --paper-text: #262a31;
  --paper-dim: #545b66;
  --paper-accent: #1f6fb2;
  --cad-sheet: #15171a;
  --cad-grid: #2a2f35;
  --cad-red: #e4583c;
  --cad-cyan: #3ab4ea;
  --cad-green: #5fd36a;
  --cad-yellow: #f2d23c;
  --cad-magenta: #e05ad3;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --font-head: Bahnschrift, "DIN Alternate", "DIN Next", "D-DIN", "Barlow", "Segoe UI", system-ui, sans-serif;
  --font-body: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  --wrap: 1200px;
  --gutter: 16px;
  --header-h: 64px;
  color-scheme: dark;
}

@media (min-width: 720px) {
  :root { --gutter: 28px; }
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: calc(var(--header-h) + 12px); }
body {
  margin: 0; background: var(--night); color: var(--text);
  font: 16px/1.6 var(--font-body);
  overflow-x: hidden;
}
img, video, canvas, svg { max-width: 100%; }
img { height: auto; }
a { color: var(--gold); text-underline-offset: 3px; }
a:hover { color: var(--cream); }
h1, h2, h3, h4 { font-family: var(--font-head); line-height: 1.15; margin: 0 0 0.5em; font-weight: 700; letter-spacing: 0.01em; }
h1 { font-size: clamp(2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.4rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.4rem); }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.3em; }
li { margin: 0.25em 0; }
strong, b { font-weight: 700; color: #fff; }
kbd {
  display: inline-block; font: 600 0.82em/1.5 var(--font-head); padding: 0 0.45em; border-radius: 4px;
  border: 1px solid var(--line-strong); border-bottom-width: 2px; background: var(--night-3); color: var(--text);
}
:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; border-radius: 4px; }
::selection { background: var(--gold); color: var(--on-gold); }

.sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 1000; background: var(--gold); color: var(--on-gold);
  padding: 10px 16px; border-radius: var(--radius-sm); font-weight: 700; text-decoration: none;
}
.skip-link:focus { top: 12px; }

.wrap { width: 100%; max-width: calc(var(--wrap) + 2 * var(--gutter)); margin: 0 auto; padding: 0 var(--gutter); }
.narrow { max-width: calc(820px + 2 * var(--gutter)); }
.section { padding: clamp(48px, 8vw, 96px) 0; }
.section.tight { padding: clamp(32px, 5vw, 56px) 0; }
.lede { font-size: clamp(1.05rem, 1.6vw, 1.22rem); color: var(--text-dim); max-width: 46em; }
.kicker {
  display: inline-block; font: 700 0.8rem/1 var(--font-head); letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--gold); margin-bottom: 14px;
}
.center { text-align: center; }
.center .lede { margin-left: auto; margin-right: auto; }
.muted { color: var(--text-dim); }
.small { font-size: 0.9rem; }

/* ------------------------------------------------------------------ header */

.site-header {
  position: sticky; top: 0; z-index: 100; height: var(--header-h);
  background: rgba(11, 18, 32, 0.92); border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
}
.site-header .wrap { display: flex; align-items: center; height: 100%; gap: 16px; }
.brand { display: flex; align-items: center; flex: 0 0 auto; text-decoration: none; }
.brand img { display: block; height: 30px; width: auto; }
@media (min-width: 1100px) { .brand img { height: 34px; } }
.nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav a {
  display: block; padding: 8px 12px; border-radius: var(--radius-sm); color: var(--text-dim); text-decoration: none;
  font: 600 0.95rem/1.2 var(--font-head); letter-spacing: 0.03em; white-space: nowrap;
}
.nav a:hover { color: #fff; background: var(--night-3); }
.nav a[aria-current="page"] { color: var(--gold); background: rgba(255, 215, 106, 0.08); }
.nav .nav-cta { margin-left: 8px; }
.nav-toggle {
  display: none; margin-left: auto; background: transparent; border: 1px solid var(--line-strong); color: var(--text);
  border-radius: var(--radius-sm); padding: 8px 12px; font: 600 0.95rem/1.2 var(--font-head); cursor: pointer;
  align-items: center; gap: 8px;
}
.nav-toggle svg { width: 20px; height: 20px; }
@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    display: none; position: absolute; left: 0; right: 0; top: var(--header-h); flex-direction: column; align-items: stretch;
    background: var(--night-2); border-bottom: 1px solid var(--line); padding: 8px var(--gutter) 16px; gap: 2px;
    max-height: calc(100vh - var(--header-h)); overflow-y: auto;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px; font-size: 1.05rem; }
  .nav .nav-cta { margin: 8px 0 0; }
}

/* ------------------------------------------------------------------ buttons */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 12px 22px; border-radius: 999px; border: 2px solid transparent;
  font: 700 1rem/1.2 var(--font-head); letter-spacing: 0.04em; text-decoration: none; cursor: pointer;
  background: var(--night-3); color: var(--text); white-space: nowrap; transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.btn svg { width: 20px; height: 20px; flex: 0 0 auto; }
@media (max-width: 400px) { .btn { white-space: normal; text-align: center; } }
.btn:hover { background: var(--night-4); color: #fff; }
.btn-gold { background: var(--gold); color: var(--on-gold); }
.btn-gold:hover { background: var(--cream); color: var(--on-gold); }
.btn-line { background: transparent; border-color: var(--line-strong); }
.btn-line:hover { border-color: var(--gold); background: transparent; color: var(--gold); }
.btn-small { padding: 8px 16px; font-size: 0.92rem; }
.btn[aria-disabled="true"], .btn.is-soon { cursor: default; }
.btn-steam.is-soon { background: transparent; border-color: var(--line-strong); color: var(--text); }
.btn-steam.is-soon:hover { background: transparent; color: var(--text); }
.soon-badge {
  display: inline-block; padding: 3px 9px; border-radius: 999px; background: var(--gold); color: var(--on-gold);
  font: 700 0.7rem/1.2 var(--font-head); letter-spacing: 0.12em; text-transform: uppercase;
}
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.center .btn-row { justify-content: center; }

/* ------------------------------------------------------------------ hero */

.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); }
.hero-bg {
  position: absolute; inset: 0; background-size: cover; background-position: 70% 30%; opacity: 0.45;
  -webkit-mask-image: linear-gradient(to bottom, #000 40%, transparent 100%); mask-image: linear-gradient(to bottom, #000 40%, transparent 100%);
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(111, 154, 216, 0.10) 1px, transparent 1px), linear-gradient(90deg, rgba(111, 154, 216, 0.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 18, 32, 0.78) 0%, rgba(11, 18, 32, 0.45) 45%, rgba(11, 18, 32, 0) 75%);
  background-size: 40px 40px, 40px 40px, auto;
}
.hero-bg { z-index: 0; }
.hero::before { z-index: 1; }
.hero .wrap { z-index: 2; }
@media (max-width: 999px) {
  .hero-bg { opacity: 0.3; }
  .hero::before { background-size: 40px 40px, 40px 40px, 0 0; }
}
.hero .wrap { position: relative; display: grid; gap: clamp(24px, 4vw, 48px); padding-top: clamp(28px, 6vw, 72px); padding-bottom: clamp(36px, 6vw, 80px); align-items: center; }
@media (min-width: 1000px) { .hero .wrap { grid-template-columns: 5fr 7fr; } }
.hero-logo { width: min(560px, 100%); display: block; margin: 0 0 18px; filter: drop-shadow(0 6px 18px rgba(0, 0, 0, 0.5)); }
.hero h1 { font-size: clamp(1.6rem, 3.6vw, 2.5rem); }
.hero .lede { color: var(--text); }
.hero .btn-row { margin-top: 22px; }
.hero-note { margin-top: 16px; font-size: 0.92rem; color: var(--text-dim); }

/* ------------------------------------------------------------------ video player */

.player {
  position: relative; aspect-ratio: 16 / 9; background: #000; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); border: 1px solid var(--line);
}
.player video, .player img.poster { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.player video { object-fit: contain; background: #000; }
.player .play {
  position: absolute; inset: 0; display: grid; place-items: center; background: linear-gradient(to top, rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.05) 60%);
  border: 0; cursor: pointer; color: #fff; padding: 0; width: 100%;
}
.player .play .disc {
  width: clamp(64px, 9vw, 92px); height: clamp(64px, 9vw, 92px); border-radius: 50%; background: var(--gold); color: var(--on-gold);
  display: grid; place-items: center; box-shadow: 0 8px 26px rgba(0, 0, 0, 0.45); transition: transform 0.15s;
}
.player .play:hover .disc, .player .play:focus-visible .disc { transform: scale(1.07); }
.player .play svg { width: 42%; height: 42%; margin-left: 6%; }
.player .play .label {
  position: absolute; left: 16px; bottom: 14px; right: 16px; text-align: left; font: 700 1rem/1.3 var(--font-head);
  letter-spacing: 0.04em; text-shadow: 0 2px 6px rgba(0, 0, 0, 0.8);
}
.player .play .label span { display: block; font-weight: 400; color: var(--text-dim); font-size: 0.88rem; }

.playlist { display: grid; gap: 10px; margin-top: 14px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 210px), 1fr)); }
.playlist button {
  display: grid; grid-template-columns: 112px 1fr; gap: 10px; align-items: center; text-align: left; width: 100%;
  background: var(--night-2); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 6px; color: var(--text); cursor: pointer;
  font: inherit;
}
.playlist button:hover { border-color: var(--line-strong); background: var(--night-3); }
.playlist button[aria-current="true"] { border-color: var(--gold); background: rgba(255, 215, 106, 0.08); }
.playlist img { width: 112px; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 4px; display: block; }
.playlist b { display: block; font: 700 0.92rem/1.25 var(--font-head); color: #fff; }
.playlist span { display: block; font-size: 0.8rem; color: var(--text-faint); }
.now-playing { margin-top: 14px; }
.now-playing h3 { margin-bottom: 4px; }
.now-playing p { color: var(--text-dim); margin: 0; }

/* ------------------------------------------------------------------ stats strip */

.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
@media (min-width: 640px) { .stats { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1000px) { .stats { grid-template-columns: repeat(6, 1fr); } }
.stat { background: var(--night-2); padding: 18px 14px; text-align: center; }
.stat b { display: block; font: 700 clamp(1.5rem, 3vw, 2.1rem)/1.1 var(--font-head); color: var(--gold); }
.stat span { display: block; margin-top: 6px; font-size: 0.86rem; color: var(--text-dim); line-height: 1.35; }

/* ------------------------------------------------------------------ banners (after the store page's section banners) */

.banner {
  text-align: center; padding: clamp(28px, 5vw, 48px) var(--gutter); background: #0e1626; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.banner h2 {
  font: 700 clamp(2rem, 7vw, 4.4rem)/1 var(--font-head); letter-spacing: 0.22em; margin: 0 0 14px; color: var(--gold);
  padding-left: 0.22em; /* the last letter's spacing, so the word sits centered */
}
.banner p { margin: 0; font: 600 clamp(1rem, 2vw, 1.3rem)/1.3 var(--font-head); color: #fff; letter-spacing: 0.02em; }
.banner.cream h2 { color: var(--cream); }
.banner.blueprint { background: #173f7a; }
.banner.blueprint h2 { color: #e8f0ff; }
.banner.blueprint {
  background-image: linear-gradient(rgba(111, 154, 216, 0.16) 1px, transparent 1px), linear-gradient(90deg, rgba(111, 154, 216, 0.16) 1px, transparent 1px);
  background-size: 32px 32px; background-color: #173f7a;
}
.banner.cad { background-color: var(--cad-sheet); background-image: linear-gradient(var(--cad-grid) 1px, transparent 1px), linear-gradient(90deg, var(--cad-grid) 1px, transparent 1px); background-size: 32px 32px; }
.banner.cad h2 { color: var(--cad-yellow); }

/* ------------------------------------------------------------------ cards */

.grid { display: grid; gap: clamp(14px, 2vw, 24px); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr)); }
.card {
  background: var(--night-2); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column;
}
.card > img, .card > .media { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; background: #000; }
.card .body { padding: 18px 20px 20px; flex: 1; display: flex; flex-direction: column; }
.card .body p { color: var(--text-dim); }
.card .body .more { margin-top: auto; font: 700 0.95rem/1.2 var(--font-head); letter-spacing: 0.03em; }
.card .tag {
  display: inline-block; font: 700 0.72rem/1 var(--font-head); letter-spacing: 0.16em; text-transform: uppercase; color: var(--gold); margin-bottom: 10px;
}
a.card { text-decoration: none; color: inherit; transition: border-color 0.15s, transform 0.15s; }
a.card:hover { border-color: var(--gold); transform: translateY(-2px); color: inherit; }

.split { display: grid; gap: clamp(20px, 4vw, 48px); align-items: center; }
.split > *, .grid > *, .hero .wrap > *, .editions > *, .req-grid > * { min-width: 0; }
@media (min-width: 900px) {
  .split { grid-template-columns: 1fr 1fr; }
  .split.wide-media { grid-template-columns: 5fr 7fr; }
  .split.lead-media { grid-template-columns: 7fr 5fr; }
  .split.flip > :first-child { order: 2; }
}

/* ------------------------------------------------------------------ clips (muted loops) and figures */

.clip { margin: 0; }
.clip .frame { position: relative; border-radius: var(--radius); overflow: hidden; background: #000; aspect-ratio: 1232 / 694; border: 1px solid var(--line); }
.clip video, .clip img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.clip .toggle {
  position: absolute; right: 10px; bottom: 10px; width: 40px; height: 40px; border-radius: 50%; border: 0; cursor: pointer;
  background: rgba(0, 0, 0, 0.6); color: #fff; display: grid; place-items: center; padding: 0;
}
.clip .toggle svg { width: 18px; height: 18px; }
.clip figcaption, figure.shot figcaption { font-size: 0.9rem; color: var(--text-dim); margin-top: 8px; }
figure.shot { margin: 0; }
figure.shot img { display: block; width: 100%; border-radius: var(--radius); border: 1px solid var(--line); }

/* ------------------------------------------------------------------ the drafting mat (2D tower) and the CAD paper (3D tower) */

.mat {
  position: relative; background-color: var(--mat); color: var(--mat-text);
  background-image:
    linear-gradient(rgba(169, 209, 189, 0.20) 1px, transparent 1px), linear-gradient(90deg, rgba(169, 209, 189, 0.20) 1px, transparent 1px),
    linear-gradient(rgba(169, 209, 189, 0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(169, 209, 189, 0.08) 1px, transparent 1px);
  background-size: 60px 60px, 60px 60px, 12px 12px, 12px 12px;
  border: 10px solid var(--mat-edge); border-radius: 14px; padding: clamp(28px, 5vw, 56px) clamp(18px, 4vw, 56px);
  box-shadow: inset 0 0 0 1px rgba(169, 209, 189, 0.35), var(--shadow);
}
.mat::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 14px; opacity: 0.6;
  background-image: repeating-linear-gradient(90deg, var(--mat-line) 0 1px, transparent 1px 12px), repeating-linear-gradient(90deg, var(--mat-line) 0 1px, transparent 1px 60px);
  background-size: 100% 7px, 100% 14px; background-repeat: no-repeat;
}
.mat h2, .mat h3 { color: #fff; }
.mat strong, .mat b { color: #fff; }
.mat .muted, .mat p.lede { color: var(--mat-dim); }
.mat a { color: var(--mark); }
.mat .tape { position: absolute; width: 92px; height: 26px; background: rgba(232, 220, 184, 0.88); box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2); }
.mat .tape.tl { left: -24px; top: 6px; transform: rotate(-38deg); }
.mat .tape.tr { right: -24px; top: 6px; transform: rotate(38deg); }
.mat .tape.bl { left: -24px; bottom: 6px; transform: rotate(38deg); }
.mat .tape.br { right: -24px; bottom: 6px; transform: rotate(-38deg); }
.mat .clip .frame, .mat figure.shot img { border-color: rgba(169, 209, 189, 0.45); }
.mat .clip figcaption { color: var(--mat-dim); }
.mat-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; border-bottom: 1px solid rgba(169, 209, 189, 0.4); padding-bottom: 12px; margin-bottom: 22px; }
.mat-head .label { font: 700 0.8rem/1 var(--font-head); letter-spacing: 0.2em; text-transform: uppercase; color: var(--mat-line); }

.paper {
  position: relative; color: var(--paper-text); background-color: var(--paper); border-radius: 4px 4px 10px 10px;
  background-image: linear-gradient(90deg, transparent 0 calc(var(--margin) - 1px), var(--paper-margin) calc(var(--margin) - 1px) calc(var(--margin) + 1px), transparent calc(var(--margin) + 1px)),
    repeating-linear-gradient(transparent 0 31px, rgba(122, 146, 172, 0.42) 31px 32px);
  --margin: 44px;
  padding: clamp(30px, 5vw, 60px) clamp(18px, 4vw, 56px) clamp(30px, 5vw, 60px) calc(var(--margin) + clamp(16px, 3vw, 40px));
  box-shadow: var(--shadow);
}
@media (min-width: 720px) { .paper { --margin: 64px; } }
.paper::before {
  /* the punched holes down the left edge */
  content: ""; position: absolute; left: calc(var(--margin) / 2 - 8px); top: 0; bottom: 0; width: 16px;
  background-image: radial-gradient(circle at 8px 8px, var(--night) 0 7px, rgba(0, 0, 0, 0.25) 7px 8px, transparent 8.5px);
  background-size: 16px 64px; background-position: 0 24px; background-repeat: repeat-y;
}
.paper::after {
  /* the torn top edge */
  content: ""; position: absolute; left: 0; right: 0; top: -7px; height: 8px;
  background: linear-gradient(135deg, var(--paper) 50%, transparent 50%) 0 0 / 12px 8px repeat-x, linear-gradient(225deg, var(--paper) 50%, transparent 50%) 6px 0 / 12px 8px repeat-x;
}
.paper h2, .paper h3 { color: #14181f; }
.paper strong, .paper b { color: #14181f; }
.paper .muted, .paper p.lede { color: var(--paper-dim); }
.paper a { color: var(--paper-accent); }
.paper .kicker { color: #b23a2e; }
.paper .clip .frame, .paper figure.shot img { border-color: rgba(38, 42, 49, 0.25); box-shadow: 0 4px 14px rgba(0, 0, 0, 0.18); }
.paper .clip figcaption { color: var(--paper-dim); }
.paper mark, .mat mark { background: transparent; color: inherit; }
.paper .hl { background: linear-gradient(transparent 55%, rgba(255, 228, 92, 0.85) 55%); }
.paper-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; border-bottom: 2px solid #262a31; padding-bottom: 10px; margin-bottom: 22px; }
.paper-head .label { font: 700 0.8rem/1 var(--font-head); letter-spacing: 0.2em; text-transform: uppercase; color: var(--paper-dim); }

.feature-list { list-style: none; padding: 0; margin: 0 0 1.5em; display: grid; gap: 14px; }
@media (min-width: 900px) { .feature-list.cols { grid-template-columns: 1fr 1fr; column-gap: 32px; } }
.feature-list li { margin: 0; padding-left: 28px; position: relative; }
.feature-list li::before {
  content: ""; position: absolute; left: 2px; top: 0.5em; width: 12px; height: 12px; border: 2px solid currentColor; opacity: 0.7; transform: rotate(45deg);
}
.mat .feature-list li::before { border-color: var(--mark); opacity: 1; }
.paper .feature-list li::before { border-color: #b23a2e; opacity: 1; }
.section-stack > * + * { margin-top: clamp(24px, 4vw, 44px); }

/* ------------------------------------------------------------------ the three styles switcher */

.styles-switch { display: grid; gap: 16px; }
.tabs { display: inline-flex; flex-wrap: wrap; gap: 6px; padding: 5px; border-radius: 999px; background: var(--night-2); border: 1px solid var(--line); }
.tabs button {
  border: 0; background: transparent; color: var(--text-dim); padding: 9px 18px; border-radius: 999px; cursor: pointer;
  font: 700 0.95rem/1.2 var(--font-head); letter-spacing: 0.04em; border: 2px solid transparent;
}
.tabs button:hover { color: #fff; }
.tabs button[aria-selected="true"], .tabs button[aria-pressed="true"] { background: var(--gold); color: var(--on-gold); }
.style-stage { position: relative; aspect-ratio: 16 / 9; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); background: #000; }
.style-stage img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity 0.35s; }
.style-stage img.on { opacity: 1; }
.style-notes { display: grid; gap: 12px; }
@media (min-width: 900px) { .style-notes { grid-template-columns: repeat(3, 1fr); } }
.style-note { padding: 16px 18px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--night-2); }
.style-note h3 { font-size: 1.1rem; margin-bottom: 6px; }
.style-note p { margin: 0; color: var(--text-dim); font-size: 0.95rem; }
.style-note.rendered { border-top: 4px solid var(--gold); }
.style-note.blueprint { border-top: 4px solid var(--bp-grid); }
.style-note.cad { border-top: 4px solid var(--cad-red); }

/* ------------------------------------------------------------------ gallery and lightbox */

.gallery { display: grid; gap: 10px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); }
.gallery a, .gallery button.thumb {
  display: block; position: relative; border-radius: var(--radius-sm); overflow: hidden; border: 1px solid var(--line); background: #000;
  padding: 0; cursor: zoom-in; width: 100%;
}
.gallery img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; transition: transform 0.25s, opacity 0.2s; }
.gallery a:hover img, .gallery button.thumb:hover img { transform: scale(1.03); }
.gallery .badge {
  position: absolute; left: 8px; top: 8px; background: rgba(0, 0, 0, 0.7); color: #fff; font: 700 0.7rem/1 var(--font-head);
  letter-spacing: 0.1em; padding: 5px 7px; border-radius: 4px; text-transform: uppercase;
}
.gallery .badge.d3 { background: rgba(255, 215, 106, 0.92); color: var(--on-gold); }
.gallery .playmark {
  position: absolute; right: 8px; bottom: 8px; width: 34px; height: 34px; border-radius: 50%; background: rgba(0, 0, 0, 0.65);
  display: grid; place-items: center; color: #fff;
}
.gallery .playmark svg { width: 14px; height: 14px; margin-left: 2px; }
.gallery .cap { display: block; padding: 8px 10px; font-size: 0.86rem; color: var(--text-dim); background: var(--night-2); text-align: left; line-height: 1.35; }

.lightbox {
  position: fixed; inset: 0; z-index: 500; background: rgba(4, 7, 13, 0.94); display: none; flex-direction: column;
}
.lightbox.open { display: flex; }
.lightbox .lb-stage { flex: 1; min-height: 0; display: flex; align-items: center; justify-content: center; padding: 56px 56px 8px; }
.lightbox img, .lightbox video { max-width: 100%; max-height: 100%; object-fit: contain; border-radius: 4px; box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6); background: #000; }
.lightbox .lb-cap { padding: 8px var(--gutter) 18px; text-align: center; color: var(--text-dim); min-height: 3.2em; font-size: 0.95rem; }
.lightbox .lb-cap b { color: #fff; }
.lightbox button.lb-btn {
  position: absolute; width: 46px; height: 46px; border-radius: 50%; border: 1px solid var(--line-strong); background: rgba(16, 26, 44, 0.85);
  color: #fff; cursor: pointer; display: grid; place-items: center; padding: 0;
}
.lightbox button.lb-btn:hover { border-color: var(--gold); color: var(--gold); }
.lightbox button.lb-btn svg { width: 22px; height: 22px; }
.lightbox .lb-close { top: 10px; right: 10px; }
.lightbox .lb-prev { left: 10px; top: 50%; transform: translateY(-50%); }
.lightbox .lb-next { right: 10px; top: 50%; transform: translateY(-50%); }
.lightbox .lb-count { position: absolute; top: 20px; left: 16px; color: var(--text-faint); font: 600 0.9rem/1 var(--font-head); letter-spacing: 0.08em; }
@media (max-width: 640px) {
  .lightbox .lb-stage { padding: 60px 8px 8px; }
  .lightbox .lb-prev, .lightbox .lb-next { top: auto; bottom: 12px; transform: none; }
  .lightbox .lb-cap { padding-bottom: 70px; }
}

/* ------------------------------------------------------------------ Life at the Top */

.lux-grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr)); }
.lux { background: var(--night-2); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.lux .pics { position: relative; aspect-ratio: 2 / 1; background: #000; }
.lux .pics button { position: absolute; inset: 0; padding: 0; border: 0; background: none; cursor: zoom-in; width: 100%; height: 100%; }
.lux .pics img { width: 100%; height: 100%; object-fit: cover; display: block; }
.lux .pics img.alt { display: none; }
.lux.show-2d .pics img.main { display: none; }
.lux.show-2d .pics img.alt { display: block; }
.lux .meta { padding: 12px 14px 14px; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 8px 12px; }
.lux .meta h3 { margin: 0; font-size: 1.08rem; }
.stars { color: var(--gold); letter-spacing: 0.08em; font-size: 0.95rem; white-space: nowrap; }
.seg { display: inline-flex; border: 1px solid var(--line-strong); border-radius: 999px; overflow: hidden; }
.seg button { border: 0; background: transparent; color: var(--text-dim); padding: 5px 12px; font: 700 0.8rem/1.2 var(--font-head); cursor: pointer; letter-spacing: 0.06em; }
.seg button[aria-pressed="true"] { background: var(--gold); color: var(--on-gold); }
.lux .meta .open3d { font: 700 0.85rem/1.2 var(--font-head); letter-spacing: 0.04em; }
.gallery.three { grid-template-columns: repeat(auto-fill, minmax(min(100%, 330px), 1fr)); }

/* ------------------------------------------------------------------ room gallery and viewer */

.viewer-shell { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--night-2); }
@media (min-width: 1000px) { .viewer-shell { grid-template-columns: minmax(0, 1fr) 340px; } }
.viewer {
  position: relative; aspect-ratio: 16 / 10; min-height: 260px; min-width: 0; background: radial-gradient(ellipse at 50% 35%, #2a3a57, #0e1626 75%); touch-action: none;
}
@media (max-width: 640px) { .viewer { aspect-ratio: 4 / 3; } }
.viewer canvas { position: absolute; inset: 0; display: block; width: 100% !important; height: 100% !important; outline: none; }
.viewer:focus-within { box-shadow: inset 0 0 0 3px var(--gold); }
.viewer.style-blueprint { background: var(--bp-paper); background-image: linear-gradient(rgba(111, 154, 216, 0.28) 1px, transparent 1px), linear-gradient(90deg, rgba(111, 154, 216, 0.28) 1px, transparent 1px); background-size: 40px 40px; }
.viewer.style-cad { background: var(--cad-sheet); background-image: linear-gradient(var(--cad-grid) 1px, transparent 1px), linear-gradient(90deg, var(--cad-grid) 1px, transparent 1px); background-size: 40px 40px; }
.viewer .v-status {
  position: absolute; inset: 0; display: grid; place-items: center; text-align: center; color: var(--text-dim); padding: 20px; pointer-events: none;
  font: 600 1rem/1.4 var(--font-head); letter-spacing: 0.04em;
}
.viewer .v-status .spin { width: 34px; height: 34px; border-radius: 50%; border: 3px solid var(--line-strong); border-top-color: var(--gold); animation: spin 0.9s linear infinite; margin: 0 auto 12px; }
@keyframes spin { to { transform: rotate(360deg); } }
.viewer .v-tools { position: absolute; left: 10px; right: 10px; top: 10px; display: flex; flex-wrap: wrap; gap: 8px; justify-content: space-between; pointer-events: none; }
.viewer .v-tools > * { pointer-events: auto; }
.viewer .v-tools .tabs { background: rgba(11, 18, 32, 0.82); }
.viewer .v-tools .tabs button { padding: 7px 13px; font-size: 0.85rem; }
.v-btns { display: flex; gap: 6px; }
.icon-btn {
  width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line-strong); background: rgba(11, 18, 32, 0.82); color: var(--text);
  display: grid; place-items: center; cursor: pointer; padding: 0;
}
.icon-btn:hover { border-color: var(--gold); color: var(--gold); }
.icon-btn[aria-pressed="true"] { background: var(--gold); color: var(--on-gold); border-color: var(--gold); }
.icon-btn svg { width: 20px; height: 20px; }
.viewer .v-hint { position: absolute; left: 12px; bottom: 10px; right: 12px; font-size: 0.8rem; color: rgba(233, 238, 246, 0.75); pointer-events: none; text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8); }
.viewer:fullscreen { aspect-ratio: auto; }
@media (max-width: 640px) {
  .viewer .v-hint { display: none; }
  .viewer .v-tools { left: 8px; right: 8px; top: 8px; gap: 6px; }
  .viewer .v-tools .tabs { padding: 3px; gap: 2px; }
  .viewer .v-tools .tabs button { padding: 6px 10px; font-size: 0.8rem; }
  .viewer .icon-btn { width: 34px; height: 34px; }
  .viewer .icon-btn svg { width: 17px; height: 17px; }
}
.v-info { padding: 18px 20px 20px; border-top: 1px solid var(--line); }
@media (min-width: 1000px) { .v-info { border-top: 0; border-left: 1px solid var(--line); } }
.v-info h2 { font-size: 1.5rem; margin-bottom: 6px; }
.v-info .meta-row { display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: center; margin-bottom: 12px; color: var(--text-dim); font-size: 0.92rem; }
.v-info .code { font: 700 0.8rem/1 var(--font-head); letter-spacing: 0.1em; border: 1px solid var(--line-strong); padding: 4px 6px; border-radius: 3px; color: var(--text); }
.v-info p.desc { color: var(--text); }
.v-info dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; margin: 0 0 14px; font-size: 0.92rem; }
.v-info dt { color: var(--text-faint); }
.v-info dd { margin: 0; }
.v-info .pic2d { margin: 10px 0 0; }
.v-info .pic2d img { display: block; width: 100%; border-radius: var(--radius-sm); border: 1px solid var(--line); }
.v-info .pic2d figcaption { font-size: 0.8rem; color: var(--text-faint); margin-top: 6px; }
.v-info .lux { background: none; border: 0; border-radius: 0; overflow: visible; }
.v-info .lux .pics { border-radius: var(--radius-sm); overflow: hidden; border: 1px solid var(--line); }
.v-info .lux figcaption { display: flex; align-items: center; justify-content: space-between; gap: 10px; }

.filters { display: grid; gap: 12px; margin: 26px 0 18px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips button {
  border: 1px solid var(--line-strong); background: transparent; color: var(--text-dim); padding: 7px 13px; border-radius: 999px; cursor: pointer;
  font: 600 0.88rem/1.2 var(--font-head); letter-spacing: 0.03em;
}
.chips button:hover { color: #fff; border-color: var(--text-dim); }
.chips button[aria-pressed="true"] { background: var(--gold); border-color: var(--gold); color: var(--on-gold); }
.filter-row { display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center; }
.filter-row label { font: 700 0.78rem/1 var(--font-head); letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-faint); }
.search-input {
  background: var(--night-2); border: 1px solid var(--line-strong); color: var(--text); border-radius: 999px; padding: 10px 16px;
  font: inherit; font-size: 0.95rem; width: min(100%, 320px);
}
.search-input::placeholder { color: var(--text-faint); }
.result-count { color: var(--text-faint); font-size: 0.9rem; margin-left: auto; }
.room-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 230px), 1fr)); list-style: none; margin: 0; padding: 0; }
.room-grid li { margin: 0; display: flex; }
.room-grid li[hidden] { display: none; }
.room-card {
  display: flex; flex-direction: column; text-align: left; padding: 0; border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--night-2); color: var(--text); cursor: pointer; overflow: hidden; font: inherit; width: 100%;
}
.room-card:hover { border-color: var(--line-strong); }
.room-card[aria-current="true"] { border-color: var(--gold); box-shadow: 0 0 0 1px var(--gold); }
.room-card .pic { position: relative; aspect-ratio: 2 / 1; background: #182234; overflow: hidden; }
.room-card .pic img { width: 100%; height: 100%; object-fit: cover; object-position: center; display: block; }
.room-card .pic .badge {
  position: absolute; right: 6px; top: 6px; background: rgba(11, 18, 32, 0.82); color: var(--gold); font: 700 0.68rem/1 var(--font-head);
  letter-spacing: 0.08em; padding: 4px 6px; border-radius: 3px;
}
.room-card .txt { padding: 9px 11px 11px; display: grid; gap: 3px; }
.room-card .txt b { font: 700 0.95rem/1.25 var(--font-head); color: #fff; }
.room-card .txt span { font-size: 0.8rem; color: var(--text-faint); display: flex; justify-content: space-between; gap: 6px; }
.room-card .txt .stars { font-size: 0.8rem; }
.empty-note { padding: 30px; text-align: center; color: var(--text-dim); border: 1px dashed var(--line-strong); border-radius: var(--radius); }

/* ------------------------------------------------------------------ requirements, FAQ, editions */

.req-grid { display: grid; gap: 18px; }
@media (min-width: 860px) { .req-grid { grid-template-columns: 1fr 1fr; } }
.req { background: var(--night-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; }
.req h3 { font-size: 1rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--gold); }
.req dl { margin: 0; display: grid; grid-template-columns: minmax(96px, auto) 1fr; gap: 8px 16px; font-size: 0.95rem; }
.req dt { color: var(--text-faint); }
.req dd { margin: 0; }
.editions { display: grid; gap: 18px; }
@media (min-width: 860px) { .editions { grid-template-columns: 1fr 1fr; } }
.edition { background: var(--night-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; display: flex; flex-direction: column; gap: 6px; }
.edition.main { border-color: rgba(255, 215, 106, 0.5); background: linear-gradient(160deg, rgba(255, 215, 106, 0.08), transparent 60%), var(--night-2); }
.edition h3 { font-size: 1.4rem; margin-bottom: 4px; }
.edition .status { font: 700 0.8rem/1 var(--font-head); letter-spacing: 0.18em; text-transform: uppercase; color: var(--gold); margin-bottom: 8px; }
.edition ul { color: var(--text-dim); }
.edition .btn-row { margin-top: auto; padding-top: 10px; }
.faq { display: grid; gap: 10px; }
.faq details { background: var(--night-2); border: 1px solid var(--line); border-radius: var(--radius-sm); }
.faq summary {
  cursor: pointer; padding: 16px 48px 16px 18px; font: 700 1.05rem/1.35 var(--font-head); letter-spacing: 0.01em; position: relative; list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 20px; top: 50%; width: 10px; height: 10px; border-right: 2px solid var(--gold); border-bottom: 2px solid var(--gold);
  transform: translateY(-70%) rotate(45deg); transition: transform 0.2s;
}
.faq details[open] summary::after { transform: translateY(-30%) rotate(-135deg); }
.faq .answer { padding: 0 18px 16px; color: var(--text-dim); }
.faq .answer p:last-child { margin-bottom: 0; }
.keys { display: grid; gap: 6px 18px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr)); font-size: 0.95rem; padding: 0; list-style: none; }
.keys li { display: flex; gap: 10px; align-items: baseline; margin: 0; }
.keys li kbd { flex: 0 0 auto; }

/* ------------------------------------------------------------------ CTA band and footer */

.cta-band {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(31, 76, 138, 0.55), rgba(11, 18, 32, 0.2) 60%), var(--night-2);
  background-image: linear-gradient(rgba(111, 154, 216, 0.10) 1px, transparent 1px), linear-gradient(90deg, rgba(111, 154, 216, 0.10) 1px, transparent 1px), linear-gradient(120deg, rgba(31, 76, 138, 0.6), rgba(11, 18, 32, 0.2) 70%);
  background-size: 40px 40px, 40px 40px, auto;
}
.cta-band .wrap { display: grid; gap: 18px; align-items: center; padding-top: clamp(36px, 6vw, 64px); padding-bottom: clamp(36px, 6vw, 64px); }
@media (min-width: 900px) { .cta-band .wrap { grid-template-columns: 1fr auto; } }
.cta-band h2 { margin-bottom: 8px; }
.cta-band p { margin: 0; color: var(--text-dim); }

.site-footer { padding: 40px 0 48px; color: var(--text-faint); font-size: 0.92rem; }
.site-footer .wrap { display: grid; gap: 22px; }
@media (min-width: 860px) { .site-footer .wrap { grid-template-columns: auto 1fr; align-items: start; } }
.site-footer img { height: 28px; width: auto; opacity: 0.9; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 6px 20px; justify-content: flex-start; }
@media (min-width: 860px) { .site-footer nav { justify-content: flex-end; } }
.site-footer nav a { color: var(--text-dim); text-decoration: none; }
.site-footer nav a:hover { color: var(--gold); }
.site-footer .legal { grid-column: 1 / -1; border-top: 1px solid var(--line); padding-top: 18px; display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; }

/* ------------------------------------------------------------------ page heads */

.page-head { border-bottom: 1px solid var(--line); position: relative; overflow: hidden; }
.page-head::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0.8;
  background-image: linear-gradient(rgba(111, 154, 216, 0.09) 1px, transparent 1px), linear-gradient(90deg, rgba(111, 154, 216, 0.09) 1px, transparent 1px);
  background-size: 40px 40px;
}
.page-head .wrap { position: relative; padding-top: clamp(36px, 6vw, 72px); padding-bottom: clamp(28px, 5vw, 56px); }
.page-head p.lede { margin-bottom: 0; }

.toc-inline { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.toc-inline a {
  border: 1px solid var(--line-strong); border-radius: 999px; padding: 7px 14px; text-decoration: none; color: var(--text-dim);
  font: 600 0.9rem/1.2 var(--font-head); letter-spacing: 0.03em;
}
.toc-inline a:hover { color: var(--gold); border-color: var(--gold); }

.note-box { border-left: 4px solid var(--gold); background: var(--night-2); padding: 14px 18px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-dim); }
.note-box strong { color: #fff; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}