*{box-sizing:border-box}
:root{--bg:#07080f;--fg:#f4f5fb;--muted:#9aa1bd;--line:#ffffff1a;--win:#4b8bc5;--win2:#83a7ff;--lin:#e95420;--lin2:#ff9a5a;--glow:#8c9fff;--glow-rgb:140,160,255;--ease:cubic-bezier(.2,.8,.2,1);font-family:'DM Sans',system-ui,sans-serif;color:var(--fg);background:var(--bg)}
body{margin:0;min-height:100vh;overflow:hidden;background:radial-gradient(1200px 700px at 50% 30%,#141a33 0,var(--bg) 70%);transition:background .6s}
body[data-os=windows]{--glow:#6fa8ff;--glow-rgb:111,168,255;background:radial-gradient(1200px 700px at 30% 40%,#10284d 0,var(--bg) 70%)}
body[data-os=linux]{--glow:#ff7a3d;--glow-rgb:255,122,61;background:radial-gradient(1200px 700px at 70% 40%,#3a1530 0,var(--bg) 70%)}
kbd{display:inline-grid;place-items:center;min-width:22px;height:22px;padding:0 6px;border:1px solid #ffffff30;border-bottom-width:2px;border-radius:6px;background:#ffffff0d;font:600 11px 'IBM Plex Mono',monospace;color:var(--fg)}
button{font:inherit;color:inherit}
#bg{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
.grid-floor{position:fixed;left:-50%;right:-50%;bottom:-2px;height:46vh;z-index:0;pointer-events:none;
 overflow:hidden;
 background-blend-mode:normal;transform:perspective(420px) rotateX(62deg) translateX(calc(var(--px,0)*-40px));transform-origin:50% 100%;mask:linear-gradient(transparent,#000 35%);-webkit-mask:linear-gradient(transparent,#000 35%);transition:filter .6s}
/* Grille qui défile : avant, on animait background-position (toute la grille était repeinte 60 fois par seconde).
   Maintenant la grille est dessinée une fois sur un calque (::before, 80 px plus haut que le sol) que l'on fait
   glisser de 80 px avec transform, et le fondu vers le fond est posé par-dessus (::after). Même image, même vitesse. */
.grid-floor::before{content:'';position:absolute;left:0;right:0;top:-80px;bottom:0;
 background:repeating-linear-gradient(90deg,rgba(var(--glow-rgb),.22) 0 1px,transparent 1px 80px),repeating-linear-gradient(0deg,rgba(var(--glow-rgb),.22) 0 1px,transparent 1px 80px) 0 100%/100% calc(100% - 80px);
 animation:floor 3s linear infinite}
.grid-floor::after{content:'';position:absolute;inset:0;background:linear-gradient(transparent 0,var(--bg) 96%)}
@keyframes floor{to{transform:translate3d(0,80px,0)}}
/* Fond caché (écran de démarrage ou transition de lancement par-dessus) : grille en pause — classe posée par home.js */
body.bg-covered .grid-floor::before{animation-play-state:paused}
.spot{position:fixed;inset:0;z-index:0;pointer-events:none;background:radial-gradient(500px circle at var(--mx,50%) var(--my,40%),rgba(var(--glow-rgb),.12),transparent 60%)}

/* ----- POST ----- */
.post{position:fixed;inset:0;z-index:20;background:#05060a;padding:clamp(20px,5vw,56px);font:14px/1.7 'IBM Plex Mono',monospace;color:#c9cee6;transition:opacity .6s,transform .6s var(--ease);cursor:pointer}
.post.gone{opacity:0;transform:scale(1.04);pointer-events:none}
.post[hidden]{display:none}
.post-head{display:flex;gap:16px;align-items:center;margin-bottom:26px}
.post-logo{display:grid;place-items:center;width:58px;height:58px;border-radius:16px;border:1px solid #6472bd;font:700 20px 'DM Sans';color:#fff;box-shadow:0 0 40px #4555b666;animation:pulse 2s ease-in-out infinite}
@keyframes pulse{50%{box-shadow:0 0 70px #7f8dffaa}}
.post-head b{display:block;color:#fff}.post-head small{color:#7b83a6}
.post-log{margin:0;white-space:pre-wrap;min-height:40vh}
.post-log div{animation:lineIn .2s ease-out both}
.post-log div:last-child::after{content:'▌';margin-left:4px;animation:blink 1s steps(1) infinite}
@keyframes lineIn{from{opacity:0;transform:translateX(-8px)}}
@keyframes blink{50%{opacity:0}}
.ok{color:#5ef08f;font-weight:600}
.post-skip{position:absolute;left:clamp(20px,5vw,56px);bottom:26px;margin:0;color:#6d7596;font-size:12px}

/* ----- Menu ----- */
.boot-menu{position:relative;z-index:2;min-height:100vh;display:grid;grid-template-rows:auto 1fr auto;justify-items:center;padding:clamp(28px,6vh,64px) 24px 0;gap:clamp(18px,3vh,34px)}
.boot-menu[hidden]{display:none}
.boot-menu>*{opacity:0;transform:translateY(24px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.boot-menu.in>*{opacity:1;transform:none}
.boot-menu.in>.choices{transition-delay:.18s}.boot-menu.in>.status{transition-delay:.4s}
.hero{text-align:center;transform:translate(calc(var(--px,0)*-10px),calc(var(--py,0)*-6px))}
.badge{display:inline-flex;align-items:center;gap:9px;padding:7px 14px;border:1px solid var(--line);border-radius:99px;background:#ffffff08;font-size:12px;color:#cfd4ea;backdrop-filter:blur(8px)}
.dot{width:8px;height:8px;border-radius:50%;background:#3ddc84;box-shadow:0 0 0 0 #3ddc8488;animation:ping 1.8s infinite}
@keyframes ping{70%{box-shadow:0 0 0 9px #3ddc8400}}
.kicker{margin:18px 0 6px;font:600 11px 'IBM Plex Mono';letter-spacing:.3em;color:var(--muted)}
.hero h1{margin:0;font-size:clamp(2.6rem,7.5vw,6.2rem);line-height:.92;letter-spacing:-.055em;font-weight:700}
.hero h1 span{background:linear-gradient(180deg,#fff,#b9c0dc);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--win2),#c79bff,var(--lin2),var(--win2));background-size:300% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;animation:shine 8s linear infinite}
@keyframes shine{to{background-position:300% 0}}
.role{margin:14px 0 0;font:15px 'IBM Plex Mono';color:#c4c9e2;min-height:1.5em}
.caret{display:inline-block;width:2px;height:1.05em;margin-left:3px;vertical-align:-2px;background:var(--glow);animation:blink 1s steps(1) infinite}

.choices{display:grid;grid-template-columns:1fr auto 1fr;gap:clamp(14px,2.4vw,30px);align-items:center;width:min(1040px,100%);perspective:1400px}
.or{display:grid;justify-items:center;gap:10px;color:var(--muted);font:600 11px 'IBM Plex Mono';letter-spacing:.2em;text-transform:uppercase}
.or::before,.or::after{content:'';width:1px;height:60px;background:linear-gradient(transparent,#ffffff33,transparent)}
.os-card{--c:var(--win);--c2:var(--win2);position:relative;display:grid;gap:14px;padding:14px 14px 18px;border:1px solid var(--line);border-radius:24px;background:linear-gradient(160deg,#ffffff0f,#ffffff04);cursor:pointer;text-align:left;backdrop-filter:blur(14px);transform-style:preserve-3d;
 transform:rotateX(var(--rx,0)) rotateY(var(--ry,0));transition:transform .25s ease-out,border-color .3s,box-shadow .4s,opacity .4s,filter .4s;outline:none}
.os-card.lin{--c:var(--lin);--c2:var(--lin2)}
.os-card::before{content:'';position:absolute;inset:0;border-radius:inherit;pointer-events:none;background:radial-gradient(400px circle at var(--gx,50%) var(--gy,50%),color-mix(in srgb,var(--c) 22%,transparent),transparent 60%);opacity:0;transition:opacity .3s}
.os-card::after{content:'';position:absolute;inset:-1px;border-radius:inherit;padding:1px;pointer-events:none;background:conic-gradient(from var(--ang,0deg),transparent 0 70%,var(--c2),var(--c),transparent);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .3s}
@property --ang{syntax:'<angle>';inherits:false;initial-value:0deg}
.os-card:hover,.os-card.sel,.os-card:focus-visible{border-color:color-mix(in srgb,var(--c) 55%,transparent);box-shadow:0 30px 80px #0009,0 0 60px color-mix(in srgb,var(--c) 30%,transparent)}
.os-card:hover::before,.os-card.sel::before{opacity:1}
.os-card.sel::after,.os-card:focus-visible::after{opacity:1;animation:spin 4s linear infinite}
@keyframes spin{to{--ang:360deg}}
.choices:has(.os-card:hover) .os-card:not(:hover){opacity:.55;filter:saturate(.6)}

/* Aperçus miniatures */
.preview{position:relative;aspect-ratio:16/10;border-radius:14px;overflow:hidden;transform:translateZ(40px);box-shadow:0 18px 40px #0008;transition:transform .35s var(--ease)}
.os-card:hover .preview{transform:translateZ(60px) scale(1.02)}
.win-prev{background:#0e2750}
.wp-bg{position:absolute;inset:0;background:linear-gradient(145deg,transparent 52%,#102e56 52.2% 57%,transparent 57.2%),linear-gradient(35deg,transparent 42%,#1d4b7d 42.2% 58%,transparent 58.2%),linear-gradient(140deg,#4b8bc5,#16477d 50%,#0e2750);animation:pan 14s ease-in-out infinite alternate}
@keyframes pan{to{transform:scale(1.12) translate(-3%,2%)}}
.wp-icons{position:absolute;left:5%;top:7%;display:grid;gap:7%;height:70%;width:7%}
.wp-icons i{display:block;aspect-ratio:1;border-radius:3px;background:#dcecffcc}
.wp-title{position:absolute;right:7%;top:12%;font:700 clamp(10px,1.6vw,17px)/.9 'DM Sans';letter-spacing:-.05em;color:#fff;text-align:left}.wp-title b{color:#d7eaff}
.wp-window{position:absolute;left:24%;top:24%;width:42%;height:48%;border-radius:6px;background:#f7fbff;box-shadow:0 10px 24px #0006;overflow:hidden;animation:winPop 5s var(--ease) infinite}
.wp-window span{display:block;height:14%;background:#edf5fd;border-bottom:1px solid #dde8f4}
.wp-window div{display:grid;grid-template-columns:repeat(3,1fr);gap:6%;padding:8%}.wp-window div i{height:22px;border-radius:4px;background:linear-gradient(#fde3ed,#fff);border-top:2px solid #e91e63}
@keyframes winPop{0%,8%{transform:scale(.6) translateY(20%);opacity:0}18%,85%{transform:none;opacity:1}100%{transform:scale(.9);opacity:0}}
.wp-bar{position:absolute;left:0;right:0;bottom:0;height:11%;background:#e9f2fcdd;display:flex;justify-content:center;align-items:center;gap:2%}
.wp-bar i{width:5%;aspect-ratio:1;border-radius:3px;background:#1b335166}.wp-bar i.st{background:#3a8fd9}
.lin-prev{background:#1c1022}
.lp-bg{position:absolute;inset:0;background:radial-gradient(ellipse at 50% 65%,#59325d 0,#2d1934 42%,#171422 100%)}
.lp-bg i,.lp-bg b{position:absolute;border-radius:50%}.lp-bg i{width:60%;aspect-ratio:1;right:-15%;top:10%;background:#783b61;opacity:.75;animation:pan 10s ease-in-out infinite alternate}.lp-bg b{width:25%;aspect-ratio:1;left:30%;top:25%;background:#a15e79;opacity:.25;animation:pan 8s ease-in-out infinite alternate-reverse}
.lp-top{position:absolute;left:0;right:0;top:0;height:8%;background:#0b0a0f;display:flex;justify-content:space-between;align-items:center;padding:0 3%;font:clamp(6px,.7vw,8px) 'DM Sans';color:#fff}
.lp-dock{position:absolute;left:2%;top:50%;transform:translateY(-45%);padding:1.4%;border-radius:8px;background:#1a1220cc;display:grid;gap:5px}
.lp-dock i{width:clamp(10px,1.4vw,16px);aspect-ratio:1;border-radius:4px;background:linear-gradient(145deg,#ffab6e,#e95420)}
.lp-dock i:nth-child(2){background:linear-gradient(145deg,#5a4a66,#2a2033)}.lp-dock i:nth-child(3){background:linear-gradient(145deg,#ff8a4c,#d6336c)}.lp-dock i:nth-child(4){background:linear-gradient(145deg,#f2c14e,#d9831f)}.lp-dock i:nth-child(5){background:linear-gradient(145deg,#a78bfa,#6d3fd9)}
.lp-term{position:absolute;left:18%;top:20%;width:60%;height:62%;border-radius:6px;background:linear-gradient(#2c0f2a,#1d0a1e);box-shadow:0 10px 24px #0008;padding:5% 5% 0;display:grid;align-content:start;gap:3px;font:clamp(7px,.85vw,10px) 'IBM Plex Mono';color:#f0e6f3;border-top:10px solid #f1e9f2}
.lp-term span{opacity:0;animation:typeLine 6s steps(1) infinite}
.lp-term span:nth-child(2){animation-delay:.6s}.lp-term span:nth-child(3){animation-delay:1.1s}.lp-term span:nth-child(4){animation-delay:1.6s}
.lp-term .o{color:#ff9a5a;font-weight:600}.lp-term .c{color:#ff9a5a}
@keyframes typeLine{0%{opacity:0}8%,92%{opacity:1}100%{opacity:0}}
.card-body{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;padding:0 6px;transform:translateZ(25px)}
.os-logo{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;font-size:26px;color:#fff;background:linear-gradient(145deg,var(--c2),var(--c));box-shadow:0 8px 20px color-mix(in srgb,var(--c) 45%,transparent);transition:transform .4s var(--ease)}
.os-card:hover .os-logo{transform:rotate(-8deg) scale(1.08)}
.card-body b{display:block;font-size:20px;letter-spacing:-.02em}.card-body small{display:block;color:var(--muted);font-size:13px;line-height:1.4;margin-top:2px}
.key{align-self:start}
.feat{display:flex;gap:6px;flex-wrap:wrap;margin:0;padding:0 6px;list-style:none;transform:translateZ(15px)}
.feat li{padding:5px 10px;border-radius:99px;font:500 11px 'IBM Plex Mono';color:#d8dcf0;background:#ffffff0a;border:1px solid var(--line);transition:background .3s,border-color .3s}
.os-card:hover .feat li,.os-card.sel .feat li{border-color:color-mix(in srgb,var(--c) 40%,transparent);background:color-mix(in srgb,var(--c) 12%,transparent)}

/* Auto-boot */
.auto{position:fixed;left:50%;bottom:74px;z-index:5;display:flex;align-items:center;gap:12px;padding:8px 10px 8px 12px;border:1px solid var(--line);border-radius:99px;background:#0c0e18dd;backdrop-filter:blur(12px);font-size:13px;color:#cfd4ea;transform:translateX(-50%);animation:autoIn .5s var(--ease)}
.auto[hidden]{display:none}.auto.bye{opacity:0;transform:translate(-50%,10px);transition:.3s}
@keyframes autoIn{from{opacity:0;transform:translate(-50%,16px)}}
.auto p{margin:0}.auto b{color:#fff}
.auto svg{width:26px;height:26px;transform:rotate(-90deg)}.auto circle{fill:none;stroke:#ffffff22;stroke-width:3}.auto .ring{stroke:var(--glow);stroke-linecap:round;stroke-dasharray:97.4;stroke-dashoffset:0}
.auto button{border:0;background:#ffffff14;border-radius:99px;padding:6px 12px;cursor:pointer}.auto button:hover{background:#ffffff26}

/* Status */
.status{align-self:end;width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 4px 18px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}
.keys{display:flex;gap:18px;flex-wrap:wrap}.keys span{display:flex;gap:5px;align-items:center}
.quick{display:flex;gap:6px}
.quick a,.quick button{display:inline-flex;align-items:center;gap:6px;padding:7px 12px;border:1px solid var(--line);border-radius:99px;background:#ffffff08;color:#dfe3f5;text-decoration:none;font-size:12px;cursor:pointer;transition:background .2s,transform .2s var(--ease),border-color .2s}
.quick a:hover,.quick button:hover{background:#ffffff18;border-color:#ffffff40;transform:translateY(-2px)}
#clock{font:12px 'IBM Plex Mono';text-transform:capitalize}

/* Lancement */
.launch{position:fixed;inset:0;z-index:30;pointer-events:none}
.launch[hidden]{display:none}
.launch::before{content:'';position:fixed;left:var(--x);top:var(--y);width:var(--w);height:var(--h);border-radius:14px;transition:all .75s cubic-bezier(.7,0,.2,1)}
.launch.windows::before{background:linear-gradient(140deg,#4b8bc5,#16477d 50%,#0e2750)}
.launch.linux::before{background:radial-gradient(ellipse at 50% 60%,#3a1a3f,#1c0e22 60%,#0b0610)}
.launch.go::before{left:0;top:0;width:100vw;height:100vh;border-radius:0}
.launch-logo,.launch-dots,.launch p{position:fixed;left:50%;transform:translateX(-50%);opacity:0;transition:opacity .4s .6s}
.launch.go .launch-logo,.launch.go .launch-dots,.launch.go p{opacity:1}
.launch-logo{top:38%;font-size:84px;color:#fff;text-shadow:0 0 40px #fff6;animation:pulse 1.4s ease-in-out infinite}
.launch-dots{top:56%;display:flex;gap:9px}.launch-dots i{width:9px;height:9px;border-radius:50%;background:#fff;animation:dotb 1.1s ease-in-out infinite}
.launch.linux .launch-dots i{background:var(--lin)}
.launch-dots i:nth-child(2){animation-delay:.1s}.launch-dots i:nth-child(3){animation-delay:.2s}.launch-dots i:nth-child(4){animation-delay:.3s}.launch-dots i:nth-child(5){animation-delay:.4s}
@keyframes dotb{50%{transform:scale(1.4);opacity:.4}}
.launch p{top:63%;margin:0;font:14px 'IBM Plex Mono';color:#ffffffcc}
body.launching .boot-menu{filter:blur(6px);opacity:.4;transition:filter .6s,opacity .6s}

/* Responsive */
@media(max-width:899px){
 body{overflow:auto}
 .choices{grid-template-columns:1fr;max-width:460px}
 .or{grid-auto-flow:column;align-items:center}.or::before,.or::after{width:60px;height:1px;background:linear-gradient(90deg,transparent,#ffffff33,transparent)}
 .keys,.key{display:none}.status{justify-content:center;flex-wrap:wrap}
 .auto{bottom:14px}
 .grid-floor{height:30vh}
}
@media(max-height:760px) and (min-width:900px){.feat{display:none}.hero h1{font-size:clamp(2.4rem,6vw,4.6rem)}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition-duration:.01ms!important}}

/* ===== Mode « appareil modeste » (classe posée sur <html> par perf-lite.js) : mêmes effets, flous plus légers ===== */
.perf-lite .os-card{backdrop-filter:blur(6px)}
.perf-lite .badge{backdrop-filter:blur(4px)}
.perf-lite .auto{backdrop-filter:blur(6px)}

/* ===== Thème clair : accueil (le BIOS / POST reste sombre dans les deux thèmes : c'est une métaphore matérielle) ===== */
:root[data-theme="light"]{--bg:#eef2fb;--fg:#12172b;--muted:#4a5272;--line:#12172b24;--win:#2f6fd8;--win2:#4f86e8;--lin:#c9440f;--lin2:#e8702f;--glow:#4a64e0;--glow-rgb:74,100,224}
:root[data-theme="light"] body{background:radial-gradient(1200px 700px at 50% 30%,#ffffff 0,var(--bg) 70%)}
:root[data-theme="light"] body[data-os=windows]{--glow:#2f6fd8;--glow-rgb:47,111,216;background:radial-gradient(1200px 700px at 30% 40%,#d6e6ff 0,var(--bg) 70%)}
:root[data-theme="light"] body[data-os=linux]{--glow:#d4501a;--glow-rgb:212,80,26;background:radial-gradient(1200px 700px at 70% 40%,#ffdcc9 0,var(--bg) 70%)}
:root[data-theme="light"] kbd{border-color:#12172b33;background:#ffffffb3}
:root[data-theme="light"] .badge{background:#ffffffb3;color:#2a3258}
:root[data-theme="light"] .hero h1 span{background:linear-gradient(180deg,#12172b,#4b5688);-webkit-background-clip:text;background-clip:text}
:root[data-theme="light"] .role{color:#2f3760}
:root[data-theme="light"] .or::before,:root[data-theme="light"] .or::after{background:linear-gradient(transparent,#12172b33,transparent)}
:root[data-theme="light"] .os-card{background:linear-gradient(160deg,#ffffffe6,#ffffff99)}
:root[data-theme="light"] .os-card:hover,:root[data-theme="light"] .os-card.sel,:root[data-theme="light"] .os-card:focus-visible{box-shadow:0 24px 60px #2a3a7038,0 0 50px color-mix(in srgb,var(--c) 22%,transparent)}
:root[data-theme="light"] .preview{box-shadow:0 14px 30px #0a1a4a40}
:root[data-theme="light"] .feat li{color:#2f3760;background:#ffffffb3}
:root[data-theme="light"] .auto{background:#ffffffe6;color:#2a3258}
:root[data-theme="light"] .auto b{color:#12172b}
:root[data-theme="light"] .auto circle{stroke:#12172b22}
:root[data-theme="light"] .auto button{background:#12172b14}
:root[data-theme="light"] .auto button:hover{background:#12172b26}
:root[data-theme="light"] .quick a,:root[data-theme="light"] .quick button{background:#ffffffb3;color:#2a3258}
:root[data-theme="light"] .quick a:hover,:root[data-theme="light"] .quick button:hover{background:#fff;border-color:#12172b55}
:root[data-theme="light"] .avail--home{border-color:#1f9d5a66;background:#1f9d5a14;color:#0f4a2c}
@media(max-width:899px){:root[data-theme="light"] .or::before,:root[data-theme="light"] .or::after{background:linear-gradient(90deg,transparent,#12172b33,transparent)}}