:root {
  --ui-scale: 1;
  --ink: #f4f1ea; --ink-dim: rgba(244, 241, 234, 0.62); --ink-faint: rgba(244, 241, 234, 0.35);
  --glass: rgba(18, 20, 24, 0.62); --glass-strong: rgba(14, 15, 18, 0.86); --line: rgba(255, 255, 255, 0.1);
  --accent: #f2b544; --accent-2: #e8553d; --good: #5fd39a; --cold: #6cb8ff;
  --radius: 14px;
  --font: "Avenir Next", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "SF Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; overflow: hidden; background: #0b0c0e; color: var(--ink); font-family: var(--font); -webkit-font-smoothing: antialiased; user-select: none; }
#view { position: fixed; inset: 0; width: 100%; height: 100%; display: block; outline: none; touch-action: none; }
#ui { position: fixed; inset: 0; pointer-events: none; font-size: calc(14px * var(--ui-scale)); }
kbd { font-family: var(--mono); font-size: 0.82em; padding: 1px 6px; border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 5px; background: rgba(255,255,255,0.06); }

/* boot */
#boot { position: fixed; inset: 0; display: grid; place-content: center; gap: 18px; background: radial-gradient(ellipse at 50% 40%, #1b1d22, #0b0c0e 70%); z-index: 50; transition: opacity .6s; text-align: center; }
#boot.hidden { opacity: 0; pointer-events: none; }
.boot-title { font-size: 54px; font-weight: 800; letter-spacing: 0.06em; }
.boot-title span { font-weight: 300; font-size: 0.45em; margin: 0 0.4em; color: var(--accent); vertical-align: middle; letter-spacing: 0.3em; }
.boot-bar { width: 320px; height: 3px; background: rgba(255,255,255,0.1); border-radius: 2px; overflow: hidden; margin: 0 auto; }
.boot-bar i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .3s; }
#boot-status { color: var(--ink-dim); font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; }

/* ---------- layout layers ---------- */
#ui .layer { position: absolute; inset: 0; pointer-events: none; }
/* everything is click-through by default; interactive pieces opt in */
#ui button, #ui input, #ui select, #ui .screen, #ui .mainmenu, #ui .panel, #ui .inventory, #ui .challenges, #ui .tutorial, #ui .photopanel { pointer-events: auto; }
.glass { background: var(--glass); backdrop-filter: blur(14px) saturate(1.2); -webkit-backdrop-filter: blur(14px) saturate(1.2); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 10px 40px rgba(0,0,0,0.35); }
button { font: inherit; color: inherit; cursor: pointer; }
.btn { background: rgba(255,255,255,0.06); border: 1px solid var(--line); border-radius: 10px; padding: 0.55em 1em; transition: background .15s, border-color .15s, transform .1s; }
.btn:hover { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.22); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent); color: #1a1408; border-color: transparent; font-weight: 700; }
.btn.primary:hover { background: #ffc85e; }
.btn.icon { padding: 0.45em 0.7em; display: inline-flex; align-items: center; gap: 0.45em; }
.btn.small { font-size: 0.86em; padding: 0.35em 0.7em; }
.muted { color: var(--ink-dim); }
.hidden { display: none !important; }

/* ---------- HUD ---------- */
.hud-top { position: absolute; top: 16px; left: 16px; right: 16px; display: flex; justify-content: space-between; align-items: flex-start; pointer-events: none; }
.hud-top > * { pointer-events: auto; }
.coins { display: flex; align-items: center; gap: 10px; padding: 8px 14px 8px 10px; }
.coins .coin { width: 26px; height: 26px; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #ffe39a, #e0a12e 60%, #a8721a); box-shadow: inset 0 -2px 0 rgba(0,0,0,0.25); display: grid; place-items: center; font-weight: 800; font-size: 12px; color: #5a3b08; }
.coins b { font-size: 1.25em; font-variant-numeric: tabular-nums; }
.coins small { display: block; color: var(--ink-faint); font-size: 0.72em; letter-spacing: 0.08em; text-transform: uppercase; }
.combo { margin-left: 8px; color: var(--accent); font-weight: 800; opacity: 0; transition: opacity .3s; }
.combo.on { opacity: 1; }
.hud-buttons { display: flex; gap: 8px; }
.hud-buttons .btn { background: var(--glass); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.modchips { position: absolute; top: 72px; left: 16px; display: flex; flex-direction: column; gap: 6px; pointer-events: none; }
.chip { padding: 6px 12px; font-size: 0.86em; display: flex; align-items: center; gap: 8px; }
.chip i { display: block; width: 60px; height: 3px; border-radius: 2px; background: rgba(255,255,255,0.15); overflow: hidden; }
.chip i b { display: block; height: 100%; background: var(--cold); }
.challenges { position: absolute; top: 72px; right: 16px; width: 270px; padding: 12px 14px; max-height: 55vh; overflow: auto; }
.challenges h3 { margin: 0 0 8px; font-size: 0.78em; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-dim); }
.challenge { display: flex; gap: 10px; padding: 6px 0; border-top: 1px solid var(--line); font-size: 0.88em; }
.challenge .tick { width: 18px; height: 18px; border-radius: 50%; border: 1.5px solid var(--ink-faint); flex: none; margin-top: 2px; display: grid; place-items: center; font-size: 11px; }
.challenge.done .tick { background: var(--good); border-color: var(--good); color: #0b2b1c; }
.challenge.done .name { color: var(--ink-dim); text-decoration: line-through; }
.challenge .desc { color: var(--ink-faint); font-size: 0.86em; }
.challenge .reward { margin-left: auto; color: var(--accent); font-size: 0.82em; white-space: nowrap; }

/* toolbar */
.toolbar { position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%); display: flex; align-items: flex-end; gap: 10px; }
.slots { display: flex; gap: 6px; padding: 8px; }
.slot { position: relative; width: 64px; height: 64px; border-radius: 12px; background: rgba(255,255,255,0.04); border: 1px solid transparent; display: grid; place-items: center; transition: transform .12s, background .12s, border-color .12s; }
.slot img { width: 54px; height: 54px; object-fit: contain; pointer-events: none; }
.slot:hover { background: rgba(255,255,255,0.1); transform: translateY(-3px); }
.slot.active { border-color: var(--accent); background: rgba(242,181,68,0.14); }
.slot .key { position: absolute; top: 3px; left: 6px; font-size: 10px; color: var(--ink-faint); font-family: var(--mono); }
.slot .cd { position: absolute; inset: 0; border-radius: 12px; background: rgba(0,0,0,0.5); transform-origin: bottom; transform: scaleY(0); }
.toolinfo { position: absolute; bottom: 104px; left: 50%; transform: translateX(-50%); text-align: center; pointer-events: none; text-shadow: 0 1px 8px rgba(0,0,0,0.7); }
.toolinfo b { font-size: 1.1em; }
.toolinfo div { color: var(--ink-dim); font-size: 0.86em; max-width: 520px; }
.allbtn { height: 80px; padding: 0 16px; display: grid; place-items: center; gap: 2px; text-align: center; }
.allbtn small { color: var(--ink-faint); font-size: 0.72em; }

/* subtitles & toasts */
.subtitle { position: absolute; bottom: 168px; left: 50%; transform: translateX(-50%); max-width: 60%; text-align: center; font-size: 1.15em; padding: 8px 16px; border-radius: 10px; background: rgba(0,0,0,0.55); opacity: 0; transition: opacity .25s; pointer-events: none; }
.subtitle.on { opacity: 1; }
.subtitle span { color: var(--accent); font-weight: 700; margin-right: 6px; }
.toasts { position: absolute; top: 16px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; gap: 8px; align-items: center; pointer-events: none; }
.toast { padding: 9px 16px; font-size: 0.92em; animation: toastIn .35s ease-out; }
.toast.ach { border-color: rgba(242,181,68,0.6); }
.toast.ach b { color: var(--accent); }
@keyframes toastIn { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: none; } }
.floaters { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.floater { position: absolute; font-weight: 800; color: var(--accent); text-shadow: 0 2px 6px rgba(0,0,0,0.6); animation: floatUp 1s ease-out forwards; }
@keyframes floatUp { to { transform: translateY(-50px); opacity: 0; } }
.crosshair { position: absolute; left: 50%; top: 50%; width: 18px; height: 18px; margin: -9px; border: 2px solid rgba(255,255,255,0.8); border-radius: 50%; pointer-events: none; }
.fps { position: absolute; bottom: 8px; right: 10px; font-family: var(--mono); font-size: 11px; color: var(--ink-dim); white-space: pre; text-align: right; pointer-events: none; }
.debugpanel { position: absolute; top: 120px; left: 16px; font-family: var(--mono); font-size: 11px; padding: 10px 12px; white-space: pre; pointer-events: none; }

/* ---------- modal screens ---------- */
.screen { position: absolute; inset: 0; display: grid; place-items: center; background: rgba(6,7,9,0.55); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); animation: fade .25s; }
@keyframes fade { from { opacity: 0; } }
.panel { width: min(860px, 92vw); max-height: 86vh; overflow: auto; padding: 26px 28px; }
.panel h2 { margin: 0 0 16px; font-size: 1.5em; font-weight: 700; }
.panel .row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 9px 0; border-bottom: 1px solid var(--line); }
.panel .row label { color: var(--ink-dim); }
.panel .actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }
.tabs { display: flex; gap: 6px; margin-bottom: 14px; flex-wrap: wrap; }
.tab { padding: 0.45em 0.9em; border-radius: 999px; border: 1px solid var(--line); background: transparent; color: var(--ink-dim); font-size: 0.9em; }
.tab.on { background: var(--ink); color: #111; border-color: var(--ink); }
input[type=range] { width: 220px; accent-color: var(--accent); }
select, input[type=search] { background: rgba(255,255,255,0.06); color: var(--ink); border: 1px solid var(--line); border-radius: 8px; padding: 0.45em 0.7em; font: inherit; }
input[type=search] { width: 240px; }
.toggle { width: 42px; height: 24px; border-radius: 12px; background: rgba(255,255,255,0.15); position: relative; border: none; padding: 0; }
.toggle::after { content: ''; position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; border-radius: 50%; background: #fff; transition: transform .15s; }
.toggle.on { background: var(--accent); }
.toggle.on::after { transform: translateX(18px); }
.keybind { min-width: 110px; font-family: var(--mono); font-size: 0.85em; }

/* main menu */
.mainmenu { position: absolute; inset: 0; display: grid; grid-template-columns: minmax(320px, 440px) 1fr; background: linear-gradient(90deg, rgba(8,9,11,0.88) 0%, rgba(8,9,11,0.55) 38%, rgba(8,9,11,0) 70%); animation: fade .4s; }
.mainmenu .col { padding: 9vh 0 0 7vw; display: flex; flex-direction: column; gap: 10px; }
.logo { font-size: 3.4em; font-weight: 800; letter-spacing: 0.04em; line-height: 0.95; margin-bottom: 4px; }
.logo span { display: block; font-size: 0.32em; font-weight: 400; letter-spacing: 0.5em; color: var(--accent); margin: 8px 0 6px 4px; }
.tagline { color: var(--ink-dim); margin-bottom: 26px; max-width: 320px; }
.menuitem { text-align: left; font-size: 1.25em; padding: 0.5em 0; background: none; border: none; color: var(--ink-dim); transition: color .15s, transform .15s; width: fit-content; }
.menuitem:hover { color: var(--ink); transform: translateX(6px); }
.menuitem.primary { color: var(--ink); font-weight: 700; }
.menuitem:disabled { opacity: 0.35; cursor: default; transform: none; }
.menufoot { position: absolute; bottom: 20px; left: 7vw; color: var(--ink-faint); font-size: 0.8em; }
.langswitch { position: absolute; top: 20px; right: 24px; display: flex; gap: 6px; }

/* inventory */
.inventory { width: min(1040px, 94vw); height: min(720px, 86vh); display: grid; grid-template-rows: auto auto 1fr; padding: 22px 24px; }
.inv-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 12px; }
.inv-head h2 { margin: 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; overflow: auto; padding: 2px 4px 10px 0; align-content: start; }
.card { position: relative; border-radius: 12px; border: 1px solid var(--line); background: rgba(255,255,255,0.035); padding: 10px; text-align: left; display: flex; flex-direction: column; gap: 6px; transition: background .12s, border-color .12s, transform .12s; }
.card:hover { background: rgba(255,255,255,0.08); transform: translateY(-2px); }
.card.active { border-color: var(--accent); }
.card img { width: 100%; height: 92px; object-fit: contain; }
.card .nm { font-weight: 600; font-size: 0.92em; }
.card .cls { font-size: 0.72em; color: var(--ink-faint); letter-spacing: 0.08em; text-transform: uppercase; }
.card.locked img { filter: grayscale(1) brightness(0.55); }
.card .lock { font-size: 0.8em; color: var(--accent); }
.card .star { position: absolute; top: 6px; right: 8px; background: none; border: none; font-size: 1.1em; color: var(--ink-faint); padding: 2px; }
.card .star.on { color: var(--accent); }
.card .new { position: absolute; top: 8px; left: 8px; font-size: 0.65em; font-weight: 800; background: var(--accent-2); color: #fff; border-radius: 4px; padding: 1px 5px; }
.recents { display: flex; gap: 6px; align-items: center; margin-bottom: 10px; color: var(--ink-faint); font-size: 0.82em; }
.recents img { width: 34px; height: 34px; border-radius: 8px; background: rgba(255,255,255,0.05); cursor: pointer; }
.bosscard img { height: 120px; }
.statgrid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; margin-bottom: 10px; }
.stat { padding: 10px; border-radius: 10px; background: rgba(255,255,255,0.04); }
.stat b { display: block; font-size: 1.3em; }
.stat small { color: var(--ink-faint); font-size: 0.75em; }

/* tutorial */
.tutorial { position: absolute; left: 50%; bottom: 220px; transform: translateX(-50%); width: min(520px, 90vw); padding: 16px 18px; animation: toastIn .3s; }
.tutorial p { margin: 0 0 12px; line-height: 1.45; }
.tutorial .actions { display: flex; justify-content: space-between; align-items: center; }
.tutorial .dots { display: flex; gap: 5px; }
.tutorial .dots i { width: 7px; height: 7px; border-radius: 50%; background: var(--ink-faint); }
.tutorial .dots i.on { background: var(--accent); }

/* photo mode */
.photopanel { position: absolute; right: 16px; top: 16px; width: 280px; padding: 16px; }
.photopanel h3 { margin: 0 0 10px; }
.photopanel .row { display: flex; justify-content: space-between; align-items: center; padding: 6px 0; font-size: 0.88em; color: var(--ink-dim); }
.photopanel input[type=range] { width: 130px; }
.photohint { position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%); padding: 8px 14px; font-size: 0.85em; color: var(--ink-dim); }
.flash { position: absolute; inset: 0; background: #fff; animation: flash .4s forwards; pointer-events: none; }
@keyframes flash { from { opacity: 0.85; } to { opacity: 0; } }

/* ---------- phones & small screens ---------- */
@media (max-width: 760px), (max-height: 520px) {
  #ui { font-size: calc(12.5px * var(--ui-scale)); }
  .hud-top { top: 8px; left: 8px; right: 8px; }
  .coins { padding: 6px 10px 6px 8px; }
  .coins small { display: none; }
  .hud-buttons { gap: 4px; }
  .hud-buttons .btn { padding: 0.4em 0.55em; font-size: 0.9em; }
  .challenges { top: 58px; right: 8px; width: min(240px, 70vw); }
  .modchips { top: 58px; left: 8px; }
  .toolbar { bottom: 8px; gap: 6px; max-width: calc(100vw - 16px); }
  .slots { padding: 5px; gap: 3px; overflow-x: auto; max-width: calc(100vw - 96px); }
  .slot { width: 46px; height: 46px; flex: none; }
  .slot img { width: 38px; height: 38px; }
  .allbtn { height: 58px; padding: 0 10px; }
  .toolinfo { display: none; }
  .subtitle { bottom: 82px; max-width: 92%; font-size: 1em; }
  .tutorial { bottom: 120px; }
  .mainmenu { grid-template-columns: 1fr; background: linear-gradient(180deg, rgba(8,9,11,0.85) 0%, rgba(8,9,11,0.55) 60%, rgba(8,9,11,0.2) 100%); }
  .mainmenu .col { padding: 7vh 24px 0; }
  .logo { font-size: 2.6em; }
  .menufoot { left: 24px; }
  .panel, .inventory { width: 100vw; max-height: 100vh; height: 100vh; border-radius: 0; padding: 18px 16px; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(118px, 1fr)); }
  .inv-head { flex-wrap: wrap; }
  input[type=search] { width: 100%; }
  input[type=range] { width: 140px; }
  .photopanel { left: 8px; right: 8px; width: auto; top: auto; bottom: 8px; }
  .photohint { display: none; }
  .boot-title { font-size: 36px; }
  .boot-bar { width: 70vw; }
}