:root{
  --bg:#efe7cd; --panel:#faf6e8; --panel-2:#e8dfc0; --rail:#ddd2a8;
  --copper:#201d16; --copper-lt:#cf3a34; --amber:#e8a63a;
  --silk:#201d16; --silk-dim:#837a5c; --danger:#cf3a34; --ok:#2f8f5b;
  --line:#cabf9c; --lit:rgba(207,58,52,0.14); --well-track:#d8cca3;
  --rail-pos:#cf3a34; --rail-neg:#2c5aa0;
  --hard-shadow:5px 5px 0 rgba(0,0,0,0.28);
  --hard-shadow-sm:3px 3px 0 rgba(0,0,0,0.24);
  --font-mono:'JetBrains Mono',ui-monospace,monospace;
  --font-body:'Space Grotesk',system-ui,sans-serif;
}   
*{box-sizing:border-box;margin:0;padding:0;user-select:none}
html,body{width:100%;height:100%;overflow:hidden;background:var(--bg);font-family:var(--font-body)}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}}

/* boot screen */
#boot{position:fixed;inset:0;z-index:99999;background:#0c0f0a;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;transition:opacity .5s,visibility .5s}
#boot.hide{opacity:0;visibility:hidden;pointer-events:none}
#boot .glyph{width:120px;height:46px}
#boot .lbl{font-family:var(--font-mono);color:var(--amber);letter-spacing:4px;font-size:11px}
#boot .bar{width:190px;height:4px;background:#26291f;border:1px solid var(--rail-pos)}
#boot .bar i{display:block;height:100%;width:0;background:var(--amber);animation:post 1.3s steps(24) forwards}
@keyframes post{to{width:100%}}

#board{position:fixed;inset:0;z-index:0;pointer-events:none}
#desk{position:relative;z-index:10;height:calc(100vh - 48px);overflow:hidden}

/* desktop icons */
.chip{position:absolute;width:84px;height:88px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;cursor:pointer;opacity:0;transform:translateY(8px);animation:chipIn .35s ease forwards;transition:left .12s,top .12s}
@keyframes chipIn{to{opacity:1;transform:translateY(0)}}
.chip .body{width:52px;height:44px;background:#1b1a16;border:2px solid #000;border-radius:3px;display:flex;align-items:center;justify-content:center;position:relative;box-shadow:var(--hard-shadow-sm);transition:transform .12s cubic-bezier(.34,1.56,.64,1),box-shadow .12s}
.chip .body::before,.chip .body::after{content:'';position:absolute;top:8px;bottom:8px;width:4px;background:#b9b9b9}
.chip .body::before{left:-6px}
.chip .body::after{right:-6px}
.chip:hover .body{transform:translateY(-3px);box-shadow:6px 8px 0 rgba(0,0,0,.3)}
.chip:active .body{transform:translateY(0) scale(.95)}
.chip.dragging .body{background:#2a2721;box-shadow:8px 10px 0 rgba(0,0,0,.32)}
.chip svg{width:22px;height:22px;stroke:var(--amber);stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.chip .tag{font-family:var(--font-mono);font-size:10px;letter-spacing:.5px;color:#241f14;text-transform:uppercase;text-shadow:0 1px 2px rgba(255,255,255,.5)}

/* windows */
.pane{position:absolute;width:600px;height:400px;background:var(--panel);border:2px solid var(--copper);border-radius:4px;box-shadow:var(--hard-shadow);display:flex;flex-direction:column;overflow:hidden;min-width:300px;min-height:210px;z-index:20}
.pane:not(.on-top){filter:brightness(.82)}
.pane.on-top{box-shadow:8px 8px 0 rgba(0,0,0,.6);border-color:var(--copper-lt)}
.pane.min{display:none}
.pane.full{top:0!important;left:0!important;width:100vw!important;height:calc(100vh - 48px)!important;border-radius:0}
@keyframes paneIn{from{opacity:0;transform:scale(.94) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}
.pane-in{animation:paneIn .18s ease}
@keyframes paneOut{to{opacity:0;transform:scale(.92)}}
.pane.closing{animation:paneOut .14s ease forwards;pointer-events:none}

.bar{height:36px;background:var(--rail);border-bottom:2px solid var(--copper);display:flex;align-items:center;justify-content:space-between;padding:0 10px;cursor:move;font-family:var(--font-mono);font-size:12px;color:var(--silk);letter-spacing:.4px}
.bar .btns{display:flex;gap:6px}
.dot{width:14px;height:14px;border:2px solid #000;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:0;transition:transform .1s}
.dot:hover{transform:scale(1.15)}
.dot:active{transform:scale(.9)}
.dot svg{width:7px;height:7px;stroke:#000;stroke-width:2.2;fill:none}
.dot.x{background:var(--danger)}
.dot.m{background:var(--amber)}
.dot.o{background:var(--ok)}
.body-area{flex:1;padding:12px;overflow:auto;color:var(--silk);user-select:text}
.grip{position:absolute;right:0;bottom:0;width:16px;height:16px;cursor:nwse-resize;background:repeating-linear-gradient(135deg,var(--copper) 0 2px,transparent 2px 5px)}
.pane.full .grip{display:none}

/* taskbar */
#rail{position:fixed;bottom:0;left:0;right:0;height:48px;background:var(--rail);border-top:2px solid var(--copper);display:flex;align-items:center;padding:0 10px;gap:10px;z-index:9999;font-family:var(--font-mono)}
#pwr{background:var(--rail-pos);border:2px solid #000;border-radius:50%;width:40px;height:40px;color:#fff8ea;font-weight:800;font-family:var(--font-mono);font-size:15px;cursor:pointer;box-shadow:var(--hard-shadow-sm);transition:transform .1s;flex-shrink:0}
#pwr:hover{transform:translateY(-2px)}
#pwr:active{transform:translateY(0)}
#tabs{display:flex;gap:6px;flex:1;overflow-x:auto}
.tab{background:var(--panel-2);border:1px solid var(--line);padding:5px 6px 5px 10px;font-size:11.5px;color:var(--silk-dim);display:flex;align-items:center;gap:8px;cursor:pointer}
.tab.on{background:var(--lit);color:var(--silk);border-color:var(--copper)}
.tab.dimmed{opacity:.45}
.tab i{opacity:0;font-style:normal;padding:2px 4px;font-size:10px;color:var(--danger)}
.tab:hover i{opacity:1}
#led-clock{display:flex;align-items:center;gap:8px}
#led{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 6px var(--ok);animation:blink 2.4s ease-in-out infinite}
@keyframes blink{0%,100%{opacity:.5}50%{opacity:1}}
#clk{font-size:12px;color:var(--silk);text-align:right;line-height:1.3}
#clk .d{font-size:10px;color:var(--silk-dim)}

#menu{position:fixed;bottom:56px;left:10px;width:220px;background:var(--panel);border:2px solid var(--copper);box-shadow:var(--hard-shadow);padding:8px;display:none;flex-direction:column;gap:2px;z-index:10000}
#menu.open{display:flex}
.mitem{display:flex;align-items:center;gap:10px;padding:9px 8px;color:var(--silk);font-family:var(--font-mono);font-size:12.5px;cursor:pointer}
.mitem:hover{background:var(--lit);padding-left:12px}
.mitem svg{width:15px;height:15px;stroke:var(--amber);stroke-width:1.8;fill:none;flex-shrink:0}

#ctx{position:fixed;width:200px;background:var(--panel);border:2px solid var(--copper);box-shadow:var(--hard-shadow);padding:6px;display:none;flex-direction:column;z-index:100000}
#ctx.open{display:flex}
.citem{padding:8px 10px;color:var(--silk);font-family:var(--font-mono);font-size:12px;cursor:pointer}
.citem:hover{background:var(--lit)}
.csep{height:1px;background:var(--line);margin:5px 3px}

#toasts{position:fixed;bottom:58px;right:12px;display:flex;flex-direction:column;gap:8px;z-index:100001}
.toast{background:var(--panel);border:2px solid var(--copper);padding:8px 14px;color:var(--silk);font-family:var(--font-mono);font-size:12px;box-shadow:var(--hard-shadow-sm);animation:tIn .2s ease,tOut .25s ease 2.5s forwards}
@keyframes tIn{from{opacity:0;transform:translateX(24px)}to{opacity:1;transform:translateX(0)}}
@keyframes tOut{to{opacity:0;transform:translateX(24px)}}

input,button,select,textarea{background:var(--panel-2);color:var(--silk);border:1px solid var(--line);padding:7px 9px;font-family:var(--font-body);font-size:13px;outline:none;border-radius:2px}
button{cursor:pointer;font-family:var(--font-mono);font-weight:600}
button:hover{border-color:var(--copper)}
button:active{transform:translateY(1px)}
input:focus,textarea:focus,select:focus{border-color:var(--amber)}
textarea{width:100%;height:100%;resize:none;font-family:var(--font-mono);line-height:1.5}

/* settings */
.set-wrap{display:flex;gap:14px;height:100%}
.set-nav{display:flex;flex-direction:column;gap:4px;width:104px;flex-shrink:0}
.set-tab{background:transparent;border:1px solid transparent;color:var(--silk-dim);text-align:left;font-size:11.5px;padding:7px 8px}
.set-tab.on{background:var(--lit);border-color:var(--copper);color:var(--silk)}
.set-body{flex:1;overflow-y:auto}
.set-panel h3{font-family:var(--font-mono);font-size:14px;color:var(--amber);margin-bottom:2px}
.set-sub{font-size:11px;color:var(--silk-dim);margin-bottom:12px}
.row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 0;border-bottom:1px solid var(--line)}
.row:last-child{border-bottom:none}
.rlabel{font-size:12.5px;color:var(--silk)}
.sw{position:relative;width:36px;height:20px;flex-shrink:0}
.sw input{opacity:0;width:0;height:0}
.strack{position:absolute;inset:0;background:var(--well-track);border:1px solid var(--line);cursor:pointer}
.strack::before{content:'';position:absolute;width:12px;height:12px;left:3px;top:3px;background:var(--silk-dim)}
.sw input:checked+.strack{background:var(--lit);border-color:var(--copper)}
.sw input:checked+.strack::before{transform:translateX(16px);background:var(--amber)}
.acc-row{display:flex;gap:10px;margin-top:4px}
.acc-dot{width:26px;height:26px;border:2px solid transparent;cursor:pointer}
.acc-dot.on{border-color:#fff}

/* calc */
.calc{display:flex;flex-direction:column;height:100%;gap:8px}
.calc-lcd{flex-shrink:0;background:#050b08;border:2px solid var(--copper);padding:14px;text-align:right;font-family:var(--font-mono);font-size:28px;color:var(--amber);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.calc-grid{flex:1;display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(5,1fr);gap:6px}
.cbtn{border:1px solid var(--line);background:var(--panel-2);font-family:var(--font-mono);font-size:16px}
.cbtn.op{background:var(--lit);color:var(--amber);border-color:var(--copper)}
.cbtn.zero{grid-column:span 2}

/* tasks */
.tk-wrap{display:flex;flex-direction:column;height:100%;gap:8px}
.tk-add{display:flex;gap:6px;flex-shrink:0}
.tk-add input{flex:1}
.tk-filters{display:flex;gap:5px;flex-shrink:0}
.tk-filters button{flex:1;font-size:10.5px;padding:5px}
.tk-filters button.on{background:var(--lit);border-color:var(--copper);color:var(--amber)}
.tk-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:5px}
.tk-item{display:flex;align-items:center;gap:8px;padding:8px;background:var(--panel-2);border-left:3px solid var(--copper)}
.tk-item.removing{opacity:0;transform:translateX(12px);transition:opacity .16s,transform .16s}
.tk-check{width:16px;height:16px;border:2px solid var(--copper);flex-shrink:0;cursor:pointer;display:flex;align-items:center;justify-content:center}
.tk-check svg{width:9px;height:9px;stroke:var(--amber);stroke-width:2.6;opacity:0;fill:none}
.tk-check.on{background:var(--lit)}
.tk-check.on svg{opacity:1}
.tk-text{flex:1;font-size:12.5px;word-break:break-word}
.tk-text.done{color:var(--silk-dim);text-decoration:line-through}
.tk-del{opacity:0;color:var(--silk-dim);cursor:pointer;font-family:var(--font-mono);font-size:11px}
.tk-item:hover .tk-del{opacity:1}
.tk-del:hover{color:var(--danger)}
.tk-foot{display:flex;justify-content:space-between;font-size:10.5px;color:var(--silk-dim);border-top:1px solid var(--line);padding-top:6px;flex-shrink:0}
.tk-foot span:last-child{cursor:pointer;text-decoration:underline}
.tk-empty{text-align:center;color:var(--silk-dim);font-size:11.5px;padding:26px 0}

/* files */
.fgrid{display:grid;grid-template-columns:repeat(auto-fill,76px);gap:10px}
.fitem{text-align:center;cursor:pointer;padding:6px}
.fitem:hover{background:var(--lit)}
.fitem .ic{font-size:26px}
.fitem .nm{font-size:10px;font-family:var(--font-mono);overflow:hidden;text-overflow:ellipsis}

/* term */
.term-out{font-family:var(--font-mono);font-size:12.5px;color:var(--ok);white-space:pre-wrap;margin-bottom:8px}
.term-in{display:flex;align-items:center;gap:6px;font-family:var(--font-mono)}
.term-in span{color:var(--amber)}
.term-in input{flex:1;background:transparent;border:none;color:var(--silk);padding:0}

/* paint */
.ptoolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:8px}
.pcolor{width:20px;height:20px;border:2px solid transparent;cursor:pointer}
.pcolor.on{border-color:var(--amber)}
#pcanvas{background:#fff;cursor:crosshair;touch-action:none;border:2px solid var(--copper)}

/* snake */
.snk-wrap{display:flex;flex-direction:column;align-items:center;gap:8px;height:100%}
.snk-hd{display:flex;justify-content:space-between;width:100%;font-family:var(--font-mono);font-size:12px;color:var(--silk-dim)}
.snk-hd b{color:var(--amber)}
#snake-cv{background:#050b08;border:2px solid var(--copper)}

/* scope */
.scope-wrap{display:flex;flex-direction:column;height:100%;gap:10px}
#scope-cv{background:#050b08;border:2px solid var(--copper);width:100%;flex:1}
.scope-controls{display:flex;flex-direction:column;gap:8px;flex-shrink:0}
.scope-row{display:flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:11px;color:var(--silk-dim)}
.scope-row input[type=range]{flex:1}
.scope-wave-btns{display:flex;gap:6px}
.scope-wave-btns button{flex:1;font-size:10.5px;padding:6px}
.scope-wave-btns button.on{background:var(--lit);border-color:var(--copper);color:var(--amber)}

/* the bug */
#bug{position:fixed;z-index:30;width:34px;height:26px;cursor:pointer}
#bug svg{width:100%;height:100%;overflow:visible;animation:bugBob 1.6s ease-in-out infinite}
#bug .shell{fill:#2a241a;stroke:var(--copper);stroke-width:1.6;transition:stroke .3s}
#bug .shell-seam{stroke:var(--copper);stroke-width:1;opacity:.5}
#bug .leg{stroke:var(--copper);stroke-width:1.6;stroke-linecap:round;fill:none;transform-origin:17px 15px;animation:bugLeg .5s ease-in-out infinite}
#bug .leg:nth-child(2),#bug .leg:nth-child(4){animation-delay:.25s}
#bug .antenna{stroke:var(--copper);stroke-width:1.4;fill:none;transform-origin:17px 8px;animation:bugFeeler 2.4s ease-in-out infinite}
#bug .antenna-tip{fill:var(--amber)}
#bug .eye-white{fill:#fbf7ee}
#bug .pupil{fill:#171b16;transition:cy .2s}
#bug .glint{fill:#fff}
#bug .blush{fill:var(--amber);opacity:0;transition:opacity .3s}
#bug.happy .shell{stroke:var(--ok)}
#bug.happy .blush{opacity:.55}
#bug.happy .pupil{cy:12.9}
#bug.happy svg{animation-duration:1s}
#bug.hungry .shell{stroke:var(--danger)}
#bug.hungry .pupil{cy:14.4}
#bug.hungry .antenna{animation-play-state:paused;transform:rotate(-6deg)}
#bug.hungry svg{animation-duration:2.6s}
@keyframes bugBob{0%,100%{transform:translateY(0)}50%{transform:translateY(-3px)}}
@keyframes bugLeg{0%,100%{transform:rotate(0)}50%{transform:rotate(8deg)}}
@keyframes bugFeeler{0%,100%{transform:rotate(0)}50%{transform:rotate(4deg)}}
#bug-tip{position:fixed;z-index:31;background:var(--panel);border:2px solid var(--copper);padding:6px 10px;font-family:var(--font-mono);font-size:10.5px;color:var(--silk);display:none;box-shadow:var(--hard-shadow-sm);pointer-events:none}