/* OSI/7 — mobile first */
:root {
  --bg: #07070c;
  --bg2: #0e0e17;
  --fg: #f3f1ec;
  --mut: rgba(243, 241, 236, .58);
  --line: rgba(255, 255, 255, .09);
  --card: rgba(255, 255, 255, .035);
  --l7: #ff4d8d; --l6: #ff7a45; --l5: #ffc53d; --l4: #5cdb95; --l3: #36cfc9; --l2: #4d7cff; --l1: #9d5cff;
  --spectrum: linear-gradient(90deg, var(--l1), var(--l2), var(--l3), var(--l4), var(--l5), var(--l6), var(--l7));
  --ok: #5cdb95; --ko: #ff5470;
  --display: "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --ease: cubic-bezier(.2, .8, .2, 1);
  --spring: cubic-bezier(.34, 1.56, .64, 1);
  --top: calc(60px + env(safe-area-inset-top, 0px));
  --bottom: calc(96px + env(safe-area-inset-bottom, 0px));
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100dvh; background: var(--bg); color: var(--fg);
  font: 400 16px/1.55 var(--display); overflow-x: hidden;
  padding: var(--top) 0 var(--bottom);
  -webkit-font-smoothing: antialiased; -webkit-tap-highlight-color: transparent;
}
body::before {
  content: ""; position: fixed; inset: -20% -20% auto; height: 80vh; z-index: -1; pointer-events: none;
  background: radial-gradient(50% 50% at 30% 30%, rgba(157, 92, 255, .22), transparent 70%),
              radial-gradient(40% 40% at 80% 20%, rgba(255, 77, 141, .16), transparent 70%);
  filter: blur(20px);
}
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }
a { color: inherit; }
svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }
:focus-visible { outline: 2px solid var(--l3); outline-offset: 3px; border-radius: 10px; }
[hidden] { display: none !important; }
b { font-weight: 600; }

.grain {
  position: fixed; inset: 0; z-index: 90; pointer-events: none; opacity: .07; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.glow {
  position: fixed; width: 420px; height: 420px; left: -210px; top: -210px; z-index: -1; pointer-events: none;
  border-radius: 50%; background: radial-gradient(circle, rgba(54, 207, 201, .13), transparent 65%);
  transform: translate(var(--gx, -999px), var(--gy, -999px)); transition: transform .5s var(--ease);
}
#confetti { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 120; pointer-events: none; }

/* ---------- Header ---------- */
.top {
  position: fixed; inset: 0 0 auto; z-index: 50; display: flex; align-items: center; gap: 10px;
  padding: calc(10px + env(safe-area-inset-top, 0px)) 16px 10px;
  background: rgba(7, 7, 12, .72);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.logo { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 1.15rem; letter-spacing: -.02em; text-decoration: none; margin-right: auto; }
.logo em { font-style: normal; color: var(--mut); font-weight: 500; }
.logo-bars { display: grid; gap: 2px; width: 18px; }
.logo-bars i { height: 2.5px; border-radius: 2px; background: var(--l7); }
.logo-bars i:nth-child(2) { background: var(--l6); width: 85%; } .logo-bars i:nth-child(3) { background: var(--l5); }
.logo-bars i:nth-child(4) { background: var(--l4); width: 70%; } .logo-bars i:nth-child(5) { background: var(--l3); }
.logo-bars i:nth-child(6) { background: var(--l2); width: 90%; } .logo-bars i:nth-child(7) { background: var(--l1); }
.lvl { display: flex; align-items: center; gap: 8px; padding: 4px 12px 4px 4px; border-radius: 99px; background: var(--card); border: 1px solid var(--line); }
.lvl-n { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; font-weight: 700; font-size: .9rem; background: var(--spectrum); color: #0a0a10; }
.lvl-meta { display: grid; gap: 3px; text-align: left; }
.lvl-meta b { font-size: .74rem; line-height: 1; letter-spacing: .02em; }
.lvl-bar { width: 64px; height: 4px; border-radius: 4px; background: rgba(255, 255, 255, .1); overflow: hidden; }
.lvl-bar i { display: block; height: 100%; width: 0; background: var(--spectrum); transition: width .8s var(--ease); }
.lvl.bump { animation: bump .6s var(--spring); }
.icon-btn { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line); background: var(--card); }
.icon-btn[aria-pressed="false"] .wave { opacity: 0; }
.icon-btn[aria-pressed="false"] { color: var(--mut); }

/* ---------- Layout ---------- */
main { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.view { animation: viewIn .6s var(--ease) both; }
@keyframes viewIn { from { opacity: 0; transform: translateY(18px); filter: blur(6px); } }
.hero { padding: 28px 0 18px; }
.hero.small { padding-bottom: 8px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 14px; font: 500 .72rem/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--mut); }
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--l4); box-shadow: 0 0 12px var(--l4); animation: pulse 2s infinite; }
.title { margin: 0; font-weight: 700; font-size: clamp(2.6rem, 12.5vw, 6.2rem); line-height: .92; letter-spacing: -.045em; }
.hero.small .title { font-size: clamp(2.3rem, 10.5vw, 4.6rem); }
.grad { background: linear-gradient(90deg, var(--l7), var(--l6), var(--l5), var(--l4), var(--l3), var(--l2), var(--l1), var(--l7)); background-size: 200% 100%; -webkit-background-clip: text; background-clip: text; color: transparent; animation: flow 8s linear infinite; }
@keyframes flow { to { background-position: 200% 0; } }
.lead { max-width: 52ch; margin: 18px 0 0; color: var(--mut); font-size: 1.02rem; }
.muted { color: var(--mut); font-size: .86rem; }
.block { margin: 18px 0; padding: 18px; border: 1px solid var(--line); border-radius: 24px; background: var(--card); }
.block h2 { margin: 0; font-size: 1.15rem; letter-spacing: -.02em; }
.block-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; }
.chip-btn { padding: 8px 14px; border-radius: 99px; border: 1px solid var(--line); background: rgba(255, 255, 255, .05); font-size: .82rem; font-weight: 500; transition: transform .2s var(--ease), background .2s; }
.chip-btn:hover { background: rgba(255, 255, 255, .1); }
.chip-btn:active { transform: scale(.95); }
.chip-btn.red { border-color: var(--ko); color: var(--ko); }

/* ---------- 3D stage ---------- */
.stage3d { position: relative; height: min(66vh, 600px); min-height: 380px; margin: 0 -16px; overflow: hidden; }
.stage3d canvas { display: block; width: 100%; height: 100%; touch-action: pan-y; cursor: grab; }
.stage3d::after { content: ""; position: absolute; inset: auto 0 0; height: 80px; pointer-events: none; background: linear-gradient(transparent, var(--bg)); }
.stage-ui { position: absolute; z-index: 2; inset: auto 16px 18px; display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.hint { display: inline-flex; align-items: center; gap: 6px; font: 500 .72rem var(--mono); color: var(--mut); text-transform: uppercase; letter-spacing: .08em; }
.hint svg { width: 18px; height: 18px; animation: sway 2.4s ease-in-out infinite; }
@keyframes sway { 50% { transform: translateX(4px); } }
.stage3d.no-gl { display: none; }

/* ---------- Mnémo ---------- */
.mnemo-label { margin: 0 0 8px; font: 500 .72rem var(--mono); color: var(--mut); text-transform: uppercase; letter-spacing: .1em; }
.mnemo-words { display: flex; flex-wrap: wrap; gap: 6px 12px; margin: 0; font-size: clamp(1.35rem, 6vw, 2.1rem); font-weight: 600; letter-spacing: -.03em; line-height: 1.1; }
.mnemo-words span { opacity: 0; transform: translateY(14px); animation: wordIn .5s var(--spring) forwards; animation-delay: calc(var(--i) * 80ms); }
.mnemo-words span b { color: var(--c); font-weight: 700; text-shadow: 0 0 22px var(--c); }
.mnemo-words span small { display: block; font: 500 .6rem var(--mono); color: var(--c); letter-spacing: .04em; opacity: .85; }
@keyframes wordIn { to { opacity: 1; transform: none; } }

/* ---------- Liste des couches ---------- */
.layer-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.layer-row {
  width: 100%; display: grid; grid-template-columns: 38px 1fr auto; align-items: center; gap: 12px;
  padding: 12px 14px; border-radius: 16px; text-align: left; position: relative; overflow: hidden;
  background: linear-gradient(90deg, color-mix(in srgb, var(--c) 16%, transparent), transparent 70%);
  border: 1px solid color-mix(in srgb, var(--c) 22%, transparent);
  transition: transform .35s var(--spring), border-color .3s;
}
.layer-row:hover, .layer-row:focus-visible { transform: translateX(6px); border-color: var(--c); }
.layer-row .num { font: 700 1.25rem var(--mono); color: var(--c); }
.layer-row .nm { font-weight: 600; font-size: 1.04rem; }
.layer-row .nm small { display: block; color: var(--mut); font-weight: 400; font-size: .78rem; }
.layer-row .pdu { font: 500 .68rem var(--mono); text-transform: uppercase; letter-spacing: .06em; padding: 4px 8px; border-radius: 99px; color: var(--c); background: color-mix(in srgb, var(--c) 14%, transparent); }
.layer-row .seen { position: absolute; top: 8px; right: 8px; width: 6px; height: 6px; border-radius: 50%; background: var(--c); box-shadow: 0 0 8px var(--c); }

/* ---------- Marquee ---------- */
.marquee { margin: 26px -16px; overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); border-block: 1px solid var(--line); padding: 14px 0; }
.marquee-track { display: flex; gap: 28px; width: max-content; animation: marq 45s linear infinite; font: 500 .9rem var(--mono); white-space: nowrap; }
.marquee-track span { color: var(--c); }
.marquee-track span::before { content: "L" attr(data-n) " · "; opacity: .5; }
@keyframes marq { to { transform: translateX(-50%); } }

/* ---------- TCP/IP map ---------- */
.map { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: repeat(7, 34px); gap: 4px 10px; margin-top: 14px; }
.map .o { display: flex; align-items: center; gap: 8px; padding: 0 10px; border-radius: 10px; font-size: .84rem; background: color-mix(in srgb, var(--c) 18%, transparent); border-left: 3px solid var(--c); }
.map .o i { font: 700 .72rem var(--mono); font-style: normal; color: var(--c); }
.map .t { display: grid; place-content: center; text-align: center; padding: 6px; border-radius: 12px; font-size: .84rem; font-weight: 600; border: 1px dashed rgba(255, 255, 255, .25); background: rgba(255, 255, 255, .03); }
.map .t small { display: block; font: 400 .66rem var(--mono); color: var(--mut); }

/* ---------- Voyage ---------- */
.trip { display: grid; grid-template-columns: 34px minmax(0, 1fr) 34px; gap: 10px; align-items: stretch; margin-top: 14px; }
.trip-stack { display: grid; grid-template-rows: auto repeat(7, 1fr); gap: 5px; }
.trip-stack .who { font: 600 .56rem var(--mono); text-transform: uppercase; color: var(--mut); text-align: center; letter-spacing: .04em; }
.pill { display: grid; place-items: center; min-height: 28px; border-radius: 10px; font: 700 .78rem var(--mono); color: color-mix(in srgb, var(--c) 70%, #fff); border: 1px solid color-mix(in srgb, var(--c) 30%, transparent); background: color-mix(in srgb, var(--c) 6%, transparent); transition: all .4s var(--ease); }
.pill.done { background: color-mix(in srgb, var(--c) 30%, transparent); }
.pill.on { background: var(--c); color: #0a0a10; box-shadow: 0 0 22px var(--c); transform: scale(1.12); }
.trip-center { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.route { display: flex; align-items: center; justify-content: space-between; position: relative; padding: 6px 6px 22px; }
.route::before { content: ""; position: absolute; left: 14px; right: 14px; top: 13px; height: 2px; background: repeating-linear-gradient(90deg, rgba(255, 255, 255, .25) 0 6px, transparent 6px 10px); }
.hop { position: relative; z-index: 1; display: grid; justify-items: center; }
.hop i { width: 14px; height: 14px; border-radius: 50%; background: var(--bg); border: 2px solid rgba(255, 255, 255, .35); transition: all .4s var(--ease); }
.hop span { position: absolute; top: 20px; font: 500 .6rem var(--mono); color: var(--mut); white-space: nowrap; }
.hop.on i { border-color: var(--l3); background: var(--l3); box-shadow: 0 0 16px var(--l3); transform: scale(1.35); }
.hop.on span { color: var(--fg); }
.hop.past i { border-color: var(--l3); }
.packet { position: relative; flex: 1; min-height: 250px; display: flex; flex-direction: column; justify-content: center; border-radius: 22px; padding: 10px; background: rgba(255, 255, 255, .02); border: 1px solid var(--line); overflow: hidden; }
.wrap { position: relative; border: 1.5px solid var(--c); border-radius: 13px; padding: 4px 5px 5px; background: color-mix(in srgb, var(--c) 7%, transparent); }
.wrap > .hdr { display: flex; gap: 6px; align-items: baseline; margin: 0 2px 4px; font: 500 .64rem/1.35 var(--mono); color: var(--c); }
.wrap > .hdr b { font-weight: 700; padding: 0 5px; border-radius: 5px; background: var(--c); color: #0a0a10; flex: none; }
.wrap > .hdr > span { min-width: 0; overflow-wrap: anywhere; }
.wrap.l2 { padding-right: 32px; }
.wrap.l2 > .fcs { position: absolute; right: 4px; top: 6px; bottom: 6px; width: 24px; display: grid; place-items: center; border-radius: 8px; background: color-mix(in srgb, var(--c) 30%, transparent); font: 700 .5rem var(--mono); color: var(--c); writing-mode: vertical-rl; letter-spacing: .1em; }
.wrap.pop { animation: wrapIn .7s var(--spring) both; }
@keyframes wrapIn { from { transform: scale(1.25); opacity: 0; filter: blur(4px); } }
.flash { animation: flash 1.4s var(--ease); border-radius: 4px; }
@keyframes flash { 0%, 45% { background: #fff; color: #000; } }
.payload { padding: 8px 10px; border-radius: 9px; font: 500 .7rem/1.45 var(--mono); background: rgba(0, 0, 0, .35); word-break: break-all; }
.payload .k { color: var(--l7); }
.payload.enc { color: var(--l6); }
.payload.done { border: 1px solid var(--ok); }
.payload.done::before { content: "200 OK ✓  "; color: var(--ok); font-weight: 700; }
.bits { position: absolute; inset: 0; z-index: 3; display: grid; align-content: center; gap: 6px; padding: 10px; background: rgba(7, 7, 12, .88); font: 500 .8rem var(--mono); color: var(--l1); overflow: hidden; animation: fadeIn .5s both; }
.bits div { white-space: nowrap; animation: bitsRun 3s linear infinite; text-shadow: 0 0 10px var(--l1); }
.bits div:nth-child(even) { animation-direction: reverse; color: var(--l2); }
.bits p { margin: 8px 0 0; text-align: center; color: var(--fg); font: 600 .95rem var(--display); }
@keyframes bitsRun { to { transform: translateX(-50%); } }
@keyframes fadeIn { from { opacity: 0; } }
.empty-packet { text-align: center; color: var(--mut); font-size: .9rem; display: grid; gap: 10px; justify-items: center; }
.empty-packet .phone { font-size: 2.6rem; animation: floaty 3s ease-in-out infinite; }
.empty-packet code { font: 600 .95rem var(--mono); color: var(--fg); padding: 8px 12px; border-radius: 12px; background: rgba(255, 255, 255, .06); }
@keyframes floaty { 50% { transform: translateY(-8px); } }
.explain { margin-top: 14px; padding: 18px; border-radius: 22px; background: linear-gradient(160deg, color-mix(in srgb, var(--c, #fff) 14%, transparent), transparent 60%), var(--card); border: 1px solid color-mix(in srgb, var(--c, #fff) 28%, transparent); transition: border-color .4s; }
.explain h2 { margin: 4px 0 8px; font-size: 1.3rem; letter-spacing: -.02em; line-height: 1.15; }
.explain p { margin: 0; color: var(--mut); }
.explain .explain-tag { font: 600 .68rem var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--c, var(--mut)); }
.explain.swap { animation: viewIn .45s var(--ease); }
.controls { position: sticky; z-index: 5; bottom: var(--bottom); display: flex; gap: 10px; margin-top: 12px; padding: 10px 0 4px; background: linear-gradient(transparent, var(--bg) 35%); }
.ctl { display: inline-flex; align-items: center; justify-content: center; gap: 6px; height: 50px; min-width: 50px; border-radius: 18px; border: 1px solid var(--line); background: var(--card); font-weight: 600; transition: transform .2s var(--spring); }
.ctl:active { transform: scale(.94); }
.ctl:disabled { opacity: .35; }
.ctl-next { flex: 1; background: var(--fg); color: #0a0a10; border: 0; font-size: 1rem; }
.ctl-play .i-pause { display: none; } .ctl-play.playing .i-play { display: none; } .ctl-play.playing .i-pause { display: block; }
.ctl-play svg path { fill: currentColor; stroke: none; }
.progress { display: flex; gap: 4px; margin: 14px 0 6px; }
.progress button { flex: 1; height: 14px; display: grid; align-items: center; }
.progress button::before { content: ""; height: 4px; border-radius: 4px; background: rgba(255, 255, 255, .1); transition: background .3s; }
.progress button.on::before { background: var(--c, var(--fg)); }

#voyage .hero { padding: 14px 0 0; }
#voyage .hero .eyebrow { margin-bottom: 8px; }
#voyage .hero .title { font-size: clamp(1.7rem, 8vw, 4.6rem); }
#voyage .hero .title br { display: none; }
.explain { padding: 14px 16px; }
.explain h2 { font-size: 1.15rem; }
.explain p { font-size: .92rem; line-height: 1.5; }

/* ---------- Arcade ---------- */
.games { display: grid; gap: 12px; margin-top: 14px; }
.game-card {
  position: relative; display: grid; grid-template-columns: 58px 1fr; gap: 14px; align-items: center; padding: 18px; border-radius: 24px; text-align: left;
  background: linear-gradient(var(--bg2), var(--bg2)) padding-box, linear-gradient(130deg, var(--c), transparent 45%, var(--c2)) border-box;
  border: 1.5px solid transparent; overflow: hidden; transition: transform .4s var(--spring);
}
.game-card::after { content: ""; position: absolute; inset: 0; background: radial-gradient(60% 80% at 0% 0%, color-mix(in srgb, var(--c) 22%, transparent), transparent); pointer-events: none; }
.game-card:hover { transform: translateY(-3px) rotate(-.4deg); }
.game-card:active { transform: scale(.97); }
.gc-icon { display: grid; place-items: center; width: 58px; height: 58px; border-radius: 18px; font-size: 1.8rem; background: color-mix(in srgb, var(--c) 18%, transparent); }
.stackico { gap: 3px; place-content: center; }
.stackico i { width: 30px; height: 6px; border-radius: 3px; background: var(--c2); animation: stackIco 2.4s var(--spring) infinite; }
.stackico i:nth-child(2) { width: 24px; background: var(--l4); animation-delay: .1s; } .stackico i:nth-child(3) { width: 34px; background: var(--l2); animation-delay: .2s; } .stackico i:nth-child(4) { background: var(--c); animation-delay: .3s; }
@keyframes stackIco { 0%, 60%, 100% { transform: none; } 30% { transform: translateY(-4px); } }
.gc-body b { display: block; font-size: 1.3rem; letter-spacing: -.02em; }
.gc-body span { color: var(--mut); font-size: .9rem; }
.gc-best { position: absolute; top: 12px; right: 14px; font: 600 .66rem var(--mono); color: var(--c); }

.game { animation: viewIn .5s var(--ease) both; padding-top: 18px; }
.game-top { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.game-top .back { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 14px; border: 1px solid var(--line); background: var(--card); }
.game-top h2 { margin: 0; font-size: 1.3rem; letter-spacing: -.02em; flex: 1; }
.hud { display: flex; gap: 6px; font: 700 .86rem var(--mono); }
.hud span { padding: 6px 9px; border-radius: 12px; background: var(--card); border: 1px solid var(--line); }
.hud .combo { color: var(--l5); }
.hud .combo.hot { animation: bump .4s var(--spring); }
.timebar { height: 6px; border-radius: 6px; background: rgba(255, 255, 255, .08); overflow: hidden; margin-bottom: 14px; }
.timebar i { display: block; height: 100%; background: var(--spectrum); transform-origin: left; }

.qcard { position: relative; padding: 22px 18px; border-radius: 24px; background: var(--card); border: 1px solid var(--line); min-height: 128px; display: grid; align-content: center; gap: 8px; overflow: hidden; }
.qcard .cat { justify-self: start; font: 600 .66rem var(--mono); letter-spacing: .1em; text-transform: uppercase; padding: 4px 9px; border-radius: 99px; background: rgba(255, 255, 255, .08); }
.qcard .q { font-size: clamp(1.25rem, 5.5vw, 1.8rem); font-weight: 600; letter-spacing: -.02em; line-height: 1.2; }
.qcard.in { animation: qIn .45s var(--spring); }
@keyframes qIn { from { transform: translateX(30px) rotate(1deg); opacity: 0; } }
.qcard.good { border-color: var(--ok); box-shadow: 0 0 0 1px var(--ok), 0 0 40px rgba(92, 219, 149, .25); }
.qcard.bad { border-color: var(--ko); animation: shake .45s; }
.answers { display: grid; gap: 6px; margin-top: 12px; }
.ans { display: grid; grid-template-columns: 34px 1fr; align-items: center; gap: 10px; min-height: 48px; padding: 0 14px; border-radius: 14px; text-align: left; font-weight: 600; border: 1px solid color-mix(in srgb, var(--c) 35%, transparent); background: color-mix(in srgb, var(--c) 10%, transparent); transition: transform .2s var(--spring), background .2s, opacity .2s; }
.ans i { font: 700 .9rem var(--mono); font-style: normal; color: var(--c); }
.ans:active { transform: scale(.97); }
.ans.right { background: var(--c); color: #0a0a10; } .ans.right i { color: #0a0a10; }
.ans.wrong { background: var(--ko); color: #fff; animation: shake .4s; } .ans.wrong i { color: #fff; }
.answers.locked .ans:not(.right):not(.wrong) { opacity: .3; }
.feedback { margin-top: 12px; padding: 14px 16px; border-radius: 18px; background: rgba(255, 255, 255, .05); border-left: 3px solid var(--c); animation: viewIn .35s var(--ease); }
.feedback p { margin: 0 0 10px; color: var(--mut); }
.feedback b { color: var(--fg); }
.feedback .primary { padding: 10px 18px; }

.result { text-align: center; padding: 24px 8px; animation: viewIn .6s var(--ease); }
.result .big { font-size: clamp(3.5rem, 18vw, 6rem); font-weight: 700; letter-spacing: -.05em; line-height: 1; }
.result .sub { color: var(--mut); margin: 8px 0 18px; }
.result .row { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.result .tip { margin: 20px auto 0; max-width: 40ch; padding: 14px; border-radius: 18px; background: var(--card); border: 1px solid var(--line); font-size: .9rem; }
.primary { padding: 14px 22px; border-radius: 16px; background: var(--fg); color: #0a0a10; font-weight: 700; transition: transform .2s var(--spring); }
.primary:active { transform: scale(.95); }
.ghost { padding: 14px 22px; border-radius: 16px; border: 1px solid var(--line); background: var(--card); font-weight: 600; }

/* Empile */
.stackgame { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; align-items: start; }
.tray { display: grid; gap: 8px; align-content: start; }
.tray-label, .built-label { font: 600 .62rem var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--mut); margin-bottom: 2px; }
.tile { min-height: 46px; padding: 0 10px; border-radius: 14px; font-weight: 600; font-size: .92rem; background: rgba(255, 255, 255, .06); border: 1px solid var(--line); transition: transform .25s var(--spring), opacity .3s; }
.tile:active { transform: scale(.94); }
.tile.gone { visibility: hidden; }
.tile.bad { animation: shake .4s; border-color: var(--ko); }
.built { display: flex; flex-direction: column-reverse; gap: 5px; min-height: 384px; padding: 6px; border-radius: 20px; border: 1px dashed rgba(255, 255, 255, .18); }
.built.down { flex-direction: column; }
.brick { display: grid; grid-template-columns: 22px 1fr; align-items: center; gap: 6px; min-height: 48px; padding: 4px 10px; border-radius: 12px; font-weight: 600; font-size: .86rem; line-height: 1.15; background: var(--c); color: #0a0a10; box-shadow: 0 6px 24px color-mix(in srgb, var(--c) 45%, transparent); animation: brickIn .5s var(--spring) both; }
.brick i { font: 700 .76rem var(--mono); font-style: normal; }
.brick small { display: block; font: 500 .6rem var(--mono); opacity: .7; }
@keyframes brickIn { from { transform: translateY(-60px) scale(.8); opacity: 0; } }
.stack-mnemo { min-height: 1.6em; margin: 14px 0 0; font-size: 1.05rem; font-weight: 600; }
.stack-mnemo span { animation: wordIn .4s var(--spring) both; display: inline-block; margin-right: 6px; opacity: 0; transform: translateY(10px); color: var(--c); }
.seg { display: inline-flex; padding: 3px; border-radius: 99px; border: 1px solid var(--line); background: var(--card); margin-bottom: 14px; }
.seg button { padding: 7px 14px; border-radius: 99px; font-size: .8rem; font-weight: 600; color: var(--mut); }
.seg button[aria-pressed="true"] { background: var(--fg); color: #0a0a10; }

/* ---------- Profil ---------- */
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }
.stat { padding: 16px; border-radius: 20px; background: var(--card); border: 1px solid var(--line); }
.stat b { display: block; font-size: 1.9rem; letter-spacing: -.04em; line-height: 1.1; }
.stat span { color: var(--mut); font-size: .8rem; }
.mastery { display: grid; gap: 8px; }
.mrow { display: grid; grid-template-columns: 22px 96px 1fr 42px; align-items: center; gap: 8px; font-size: .86rem; width: 100%; text-align: left; }
.mrow i { font: 700 .8rem var(--mono); font-style: normal; color: var(--c); }
.mbar { height: 10px; border-radius: 10px; background: rgba(255, 255, 255, .07); overflow: hidden; }
.mbar u { display: block; height: 100%; width: 0; background: var(--c); border-radius: 10px; transition: width 1s var(--ease); box-shadow: 0 0 12px var(--c); }
.mrow em { font: 500 .74rem var(--mono); font-style: normal; color: var(--mut); text-align: right; }
.badges { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.badge { display: grid; justify-items: center; align-content: start; gap: 4px; padding: 14px 6px; border-radius: 18px; text-align: center; border: 1px solid var(--line); background: rgba(255, 255, 255, .02); }
.badge .ic { font-size: 1.7rem; filter: grayscale(1) opacity(.3); }
.badge b { font-size: .76rem; }
.badge span { font-size: .64rem; color: var(--mut); line-height: 1.3; }
.badge.got { border-color: rgba(255, 197, 61, .45); background: radial-gradient(circle at 50% 0%, rgba(255, 197, 61, .14), transparent 70%); }
.badge.got .ic { filter: none; }
.danger { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; border-style: dashed; }
.confirm { display: inline-flex; gap: 8px; align-items: center; font-size: .9rem; }

/* ---------- Tabs ---------- */
.tabs {
  position: fixed; z-index: 60; left: 50%; bottom: calc(12px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%);
  width: min(440px, calc(100% - 24px)); display: grid; grid-template-columns: repeat(4, 1fr); padding: 6px; border-radius: 24px;
  background: rgba(20, 20, 30, .78); backdrop-filter: blur(18px) saturate(1.4); -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border: 1px solid rgba(255, 255, 255, .1); box-shadow: 0 20px 50px rgba(0, 0, 0, .5);
}
.tabs a { display: grid; justify-items: center; gap: 2px; padding: 8px 0 6px; border-radius: 18px; text-decoration: none; font-size: .68rem; font-weight: 600; color: var(--mut); transition: color .3s, background .3s; }
.tabs a[aria-current="page"] { color: #0a0a10; background: var(--fg); }

/* ---------- Bottom sheet ---------- */
.sheet { width: 100%; max-width: 640px; max-height: 90dvh; margin: auto auto 0; padding: 0; border: 0; border-radius: 28px 28px 0 0; background: var(--bg2); color: var(--fg); overflow: hidden; box-shadow: 0 -20px 60px rgba(0, 0, 0, .6); }
.sheet[open] { animation: sheetUp .5s var(--ease); }
.sheet.closing { animation: sheetDown .3s var(--ease) forwards; }
.sheet::backdrop { background: rgba(4, 4, 8, .6); backdrop-filter: blur(6px); }
@keyframes sheetUp { from { transform: translateY(100%); } }
@keyframes sheetDown { to { transform: translateY(100%); } }
.sheet-inner { max-height: 90dvh; overflow-y: auto; overscroll-behavior: contain; padding: 0 20px calc(28px + env(safe-area-inset-bottom, 0px)); }
.sh-hero { position: relative; margin: 0 -20px; padding: 30px 20px 22px; background: radial-gradient(120% 100% at 0% 0%, color-mix(in srgb, var(--c) 40%, transparent), transparent 70%); border-bottom: 1px solid var(--line); }
.sh-hero::before { content: ""; position: absolute; top: 9px; left: 50%; width: 42px; height: 5px; margin-left: -21px; border-radius: 5px; background: rgba(255, 255, 255, .25); }
.sh-close { position: absolute; top: 18px; right: 16px; width: 40px; height: 40px; display: grid; place-items: center; border-radius: 50%; background: rgba(0, 0, 0, .35); }
.sh-n { font: 700 4.6rem/0.9 var(--mono); color: var(--c); letter-spacing: -.06em; text-shadow: 0 0 40px var(--c); }
.sh-hero h2 { margin: 6px 0 2px; font-size: 2rem; letter-spacing: -.04em; line-height: 1; }
.sh-hero p { margin: 0; color: var(--mut); font: 500 .76rem var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.sh-verb { display: inline-block; margin-top: 12px; padding: 6px 12px; border-radius: 99px; background: var(--c); color: #0a0a10; font-weight: 700; font-size: .84rem; }
.sh-sec { margin-top: 20px; }
.sh-sec h3 { margin: 0 0 8px; font: 600 .7rem var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--c); }
.sh-sec p { margin: 0; }
.sh-analogy { padding: 14px 16px; border-radius: 18px; background: color-mix(in srgb, var(--c) 10%, transparent); border: 1px solid color-mix(in srgb, var(--c) 25%, transparent); font-size: 1.02rem; }
.sh-analogy::before { content: "📮 "; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tags span { padding: 6px 10px; border-radius: 10px; font-size: .82rem; background: rgba(255, 255, 255, .06); border: 1px solid var(--line); }
.kv { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.kv div { padding: 12px; border-radius: 14px; background: rgba(255, 255, 255, .04); }
.kv small { display: block; color: var(--mut); font: 500 .64rem var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.kv b { font-size: .92rem; }
.term { display: grid; padding: 12px 14px; border-radius: 14px; background: #000; border: 1px solid var(--line); font: 500 .78rem/1.7 var(--mono); overflow-x: auto; white-space: pre; }
.term span::before { content: "$ "; color: var(--l4); }
.sh-hook { padding: 14px 16px; border-radius: 18px; background: rgba(255, 197, 61, .08); border: 1px dashed rgba(255, 197, 61, .4); }
.sh-hook::before { content: "🧠 "; }
.sh-nav { display: flex; gap: 8px; margin-top: 22px; }
.sh-nav button { flex: 1; padding: 13px; border-radius: 14px; border: 1px solid var(--line); background: var(--card); font-weight: 600; font-size: .88rem; }
.sh-nav button:disabled { opacity: .3; }

/* ---------- Toasts ---------- */
.toasts { position: fixed; z-index: 110; top: calc(var(--top) + 8px); left: 50%; transform: translateX(-50%); display: grid; gap: 8px; justify-items: center; pointer-events: none; width: max-content; max-width: calc(100% - 32px); }
.toast { display: flex; align-items: center; gap: 10px; padding: 10px 16px 10px 10px; border-radius: 18px; background: rgba(24, 24, 36, .94); border: 1px solid rgba(255, 197, 61, .35); box-shadow: 0 14px 40px rgba(0, 0, 0, .5); animation: toastIn .5s var(--spring), toastOut .4s var(--ease) 2.8s forwards; }
.toast .ic { font-size: 1.6rem; }
.toast b { display: block; font-size: .9rem; }
.toast span { font-size: .76rem; color: var(--mut); }
.xpfloat { position: fixed; z-index: 115; pointer-events: none; font: 700 1rem var(--mono); color: var(--l5); text-shadow: 0 0 12px rgba(255, 197, 61, .7); animation: xpUp 1.1s var(--ease) forwards; }
@keyframes xpUp { to { transform: translateY(-60px); opacity: 0; } }
@keyframes toastIn { from { transform: translateY(-30px) scale(.9); opacity: 0; } }
@keyframes toastOut { to { transform: translateY(-20px); opacity: 0; } }
@keyframes shake { 20%, 60% { transform: translateX(-7px); } 40%, 80% { transform: translateX(7px); } }
@keyframes bump { 40% { transform: scale(1.18); } }
@keyframes pulse { 50% { opacity: .4; } }

/* ---------- Desktop ---------- */
@media (min-width: 900px) {
  :root { --bottom: 40px; }
  .hero { padding-top: 56px; }
  .stage3d { margin: 0; border-radius: 32px; border: 1px solid var(--line); background: radial-gradient(60% 60% at 50% 60%, rgba(77, 124, 255, .1), transparent); }
  .stage3d::after { display: none; }
  #tour:not([hidden]) { display: grid; grid-template-columns: 1fr 1fr; column-gap: 32px; align-items: start; }
  #tour > .hero { grid-column: 1; }
  #tour > .stage3d { grid-column: 2; grid-row: 1 / span 4; height: calc(100dvh - var(--top) - 40px); max-height: 760px; position: sticky; top: calc(var(--top) + 16px); }
  #tour > .block, #tour > .marquee { grid-column: 1; }
  #tour > .marquee { margin-inline: 0; }
  #voyage { max-width: 760px; margin: 0 auto; }
  .trip { grid-template-columns: 56px minmax(0, 1fr) 56px; }
  .games { grid-template-columns: repeat(3, 1fr); }
  .game-card { grid-template-columns: 1fr; align-content: start; min-height: 240px; }
  #gameArea { max-width: 640px; margin: 0 auto; }
  .stats { grid-template-columns: repeat(4, 1fr); }
  .badges { grid-template-columns: repeat(5, 1fr); }
  .sheet { margin: auto; border-radius: 28px; }
  .sheet[open] { animation: viewIn .45s var(--ease); }
  .sheet.closing { animation: fadeOut .25s forwards; }
  .tabs { top: calc(10px + env(safe-area-inset-top, 0px)); bottom: auto; width: 400px; padding: 4px; border-radius: 18px; }
  .tabs a { grid-auto-flow: column; gap: 6px; align-items: center; justify-content: center; font-size: .78rem; padding: 7px 0; border-radius: 14px; }
  .tabs svg { width: 17px; height: 17px; }
}
@keyframes fadeOut { to { opacity: 0; } }
@media (hover: none) { .glow { display: none; } }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}