/* ===== Design tokens ===== */
:root{
  --bg-deep:#0a0e1a;
  --bg-deep-2:#0e1424;
  --panel:rgba(20,26,43,0.72);
  --panel-solid:#141a2b;
  --border:rgba(255,255,255,0.08);
  --border-strong:rgba(255,255,255,0.16);
  --text:#e8ecf5;
  --text-muted:#8b93a7;
  --teal:#2dd4bf;
  --violet:#8b5cf6;
  --amber:#fbbf24;
  --danger:#fb7185;
  --grad:linear-gradient(120deg,var(--teal),var(--violet));
  --radius-lg:18px;
  --radius-md:12px;
  --radius-sm:8px;
  --shadow-window:0 20px 60px rgba(0,0,0,0.45);
  --font-display:'Space Grotesk',sans-serif;
  --font-body:'Inter',sans-serif;
  --font-mono:'JetBrains Mono',monospace;
}

body.light{
  --bg-deep:#eef1f8;
  --bg-deep-2:#e4e9f5;
  --panel:rgba(255,255,255,0.78);
  --panel-solid:#ffffff;
  --border:rgba(20,26,43,0.08);
  --border-strong:rgba(20,26,43,0.14);
  --text:#141a2b;
  --text-muted:#5b6472;
  --shadow-window:0 20px 50px rgba(20,26,43,0.18);
}

*{box-sizing:border-box;}

body{
  margin:0;
  font-family:var(--font-body);
  background:var(--bg-deep);
  color:var(--text);
  overflow:hidden;
  -webkit-font-smoothing:antialiased;
  transition:background .4s ease,color .4s ease;
}

::selection{background:var(--violet);color:#fff;}

::-webkit-scrollbar{width:8px;height:8px;}
::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:8px;}
::-webkit-scrollbar-track{background:transparent;}

button{font-family:var(--font-body);}

/* ===== Ambient aurora background ===== */
#aurora{position:fixed;inset:0;overflow:hidden;z-index:0;pointer-events:none;}
#aurora span{
  position:absolute;
  width:60vw;height:60vw;
  border-radius:50%;
  filter:blur(90px);
  opacity:.35;
  animation:drift 22s ease-in-out infinite;
}
#aurora span:nth-child(1){background:var(--teal);top:-15%;left:-10%;}
#aurora span:nth-child(2){background:var(--violet);bottom:-20%;right:-10%;animation-duration:26s;animation-delay:-6s;}
#aurora span:nth-child(3){background:var(--amber);top:30%;left:40%;opacity:.18;animation-duration:30s;animation-delay:-12s;}
body.light #aurora span{opacity:.28;}

@keyframes drift{
  0%,100%{transform:translate(0,0) scale(1);}
  50%{transform:translate(6%,8%) scale(1.15);}
}

@media (prefers-reduced-motion:reduce){
  #aurora span{animation:none;}
}

/* ===== Login ===== */
#login{
  position:relative;z-index:1;
  height:100vh;
  display:flex;
  justify-content:center;
  align-items:center;
}

.loginBox{
  position:relative;
  background:var(--panel);
  backdrop-filter:blur(24px);
  -webkit-backdrop-filter:blur(24px);
  border:1px solid var(--border);
  padding:44px 40px;
  border-radius:var(--radius-lg);
  text-align:center;
  box-shadow:var(--shadow-window);
  width:340px;
}

.brandmark{
  font-family:var(--font-display);
  font-weight:700;
  font-size:30px;
  letter-spacing:.5px;
}
.brandmark em{
  font-style:normal;
  background:var(--grad);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.tagline{color:var(--text-muted);font-size:13px;margin:8px 0 26px;}

.loginBox input{
  width:100%;
  padding:12px 14px;
  margin-bottom:14px;
  border-radius:var(--radius-sm);
  border:1px solid var(--border-strong);
  background:rgba(255,255,255,0.04);
  color:var(--text);
  font-size:14px;
  outline:none;
  transition:border-color .2s;
}
body.light .loginBox input{background:rgba(20,26,43,0.03);}
.loginBox input:focus{border-color:var(--teal);}

.loginBox button{
  width:100%;
  padding:12px;
  border:none;
  border-radius:var(--radius-sm);
  background:var(--grad);
  color:#0a0e1a;
  font-weight:600;
  font-size:14px;
  cursor:pointer;
  transition:transform .15s, box-shadow .15s;
}
.loginBox button:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(139,92,246,.35);}
.loginBox button:active{transform:translateY(0);}

.hint{font-size:11px;color:var(--text-muted);margin-top:14px;}

/* ===== OS shell ===== */
#os{
  display:none;
  position:relative;
  z-index:1;
  height:100vh;
  background-size:cover;
  background-position:center;
  background-image:url('https://images.unsplash.com/photo-1519681393784-d120267933ba?auto=format&fit=crop&w=1600&q=70');
}

#desktop{position:absolute;inset:52px 0 96px 0;}

/* ---- Topbar ---- */
#topbar{
  position:absolute;top:0;left:0;right:0;height:52px;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 16px;
  background:var(--panel);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
  z-index:50;
}

.topbar-left{display:flex;align-items:center;gap:8px;font-family:var(--font-display);font-weight:600;font-size:14px;}
.logo-dot{width:9px;height:9px;border-radius:50%;background:var(--grad);box-shadow:0 0 10px var(--teal);}

#tabstrip{display:flex;gap:6px;align-items:center;flex:1;justify-content:center;overflow-x:auto;}
.tab{
  display:flex;align-items:center;gap:6px;
  padding:6px 12px;
  border-radius:999px;
  background:rgba(255,255,255,0.04);
  border:1px solid transparent;
  color:var(--text-muted);
  font-size:12.5px;
  cursor:pointer;
  white-space:nowrap;
  transition:all .15s;
}
body.light .tab{background:rgba(20,26,43,0.04);}
.tab:hover{color:var(--text);}
.tab.active{background:rgba(45,212,191,0.12);border-color:rgba(45,212,191,0.4);color:var(--text);}
.tab .dot{width:6px;height:6px;border-radius:50%;background:var(--grad);}
.tab .tabClose{opacity:.6;font-size:13px;line-height:1;}
.tab .tabClose:hover{opacity:1;color:var(--danger);}

.topbar-right{display:flex;align-items:center;gap:8px;}
.iconbtn{
  width:32px;height:32px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:1px solid transparent;
  background:transparent;
  color:var(--text-muted);
  cursor:pointer;
  transition:all .15s;
}
.iconbtn:hover{background:rgba(255,255,255,0.06);color:var(--text);}
body.light .iconbtn:hover{background:rgba(20,26,43,0.06);}

#time{font-family:var(--font-mono);font-size:13px;color:var(--text);min-width:76px;text-align:right;}

/* ---- Context menu ---- */
#contextMenu{
  position:absolute;z-index:200;
  list-style:none;margin:0;padding:6px;
  background:var(--panel-solid);
  border:1px solid var(--border-strong);
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-window);
  min-width:180px;
}
#contextMenu.hidden{display:none;}
#contextMenu li{
  padding:9px 12px;border-radius:var(--radius-sm);
  font-size:13px;cursor:pointer;color:var(--text);
}
#contextMenu li:hover{background:rgba(45,212,191,0.12);}

/* ---- Toasts ---- */
#toastHost{position:absolute;top:64px;right:16px;z-index:300;display:flex;flex-direction:column;gap:8px;}
.toast{
  padding:10px 16px;
  background:var(--panel-solid);
  border:1px solid var(--border-strong);
  border-left:3px solid var(--teal);
  border-radius:var(--radius-sm);
  font-size:12.5px;
  box-shadow:var(--shadow-window);
  animation:toastIn .25s ease;
}
.toast.error{border-left-color:var(--danger);}
@keyframes toastIn{from{opacity:0;transform:translateY(-6px);}to{opacity:1;transform:translateY(0);}}

/* ---- Dock ---- */
#dock{
  position:absolute;bottom:14px;left:50%;transform:translateX(-50%);
  display:flex;gap:6px;
  padding:10px;
  background:var(--panel);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border:1px solid var(--border);
  border-radius:22px;
  box-shadow:var(--shadow-window);
  z-index:60;
}
.dockicon{
  width:44px;height:44px;
  border:none;border-radius:14px;
  background:rgba(255,255,255,0.04);
  color:var(--text);
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;
  transition:transform .15s, background .15s;
}
body.light .dockicon{background:rgba(20,26,43,0.05);}
.dockicon svg{width:20px;height:20px;}
.dockicon:hover{transform:translateY(-6px);background:rgba(45,212,191,0.16);}
.dockicon.running::after{
  content:'';position:relative;display:block;
}
.dockicon.running{box-shadow:0 0 0 1px var(--teal) inset;}

/* ---- Windows ---- */
.window{
  position:absolute;
  top:110px;left:110px;
  width:420px;min-width:280px;min-height:180px;
  background:var(--panel-solid);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  display:none;
  box-shadow:var(--shadow-window);
  overflow:hidden;
  flex-direction:column;
}
.window.open{display:flex;}

.header{
  cursor:grab;
  display:flex;align-items:center;justify-content:space-between;
  padding:11px 14px;
  background:rgba(255,255,255,0.03);
  border-bottom:1px solid var(--border);
}
body.light .header{background:rgba(20,26,43,0.02);}
.header:active{cursor:grabbing;}
.wtitle{margin:0;font-family:var(--font-display);font-weight:600;font-size:13.5px;}

.wbtns{display:flex;gap:6px;}
.wbtn{
  width:14px;height:14px;border-radius:50%;
  border:none;cursor:pointer;
  background:rgba(255,255,255,0.12);
  position:relative;
  transition:transform .12s;
}
.wbtn:hover{transform:scale(1.15);}
.wbtn.min{background:var(--amber);}
.wbtn.max{background:var(--teal);}
.wbtn.close{background:var(--danger);}

.content{padding:16px;overflow:auto;flex:1;}
.window.terminal .content{padding:0;}

.resizer{
  position:absolute;right:0;bottom:0;width:16px;height:16px;
  cursor:nwse-resize;
}
.resizer::after{
  content:'';position:absolute;right:4px;bottom:4px;width:8px;height:8px;
  border-right:2px solid var(--border-strong);
  border-bottom:2px solid var(--border-strong);
}

.window.maximized{
  top:52px !important;left:0 !important;
  width:100% !important;height:calc(100vh - 52px) !important;
  border-radius:0;
}

textarea{
  width:100%;height:100%;min-height:220px;
  border:none;resize:none;outline:none;
  background:transparent;color:var(--text);
  font-family:var(--font-body);font-size:14px;line-height:1.5;
}

.searchRow{display:flex;gap:8px;}
.searchRow input{
  flex:1;padding:10px 12px;border-radius:var(--radius-sm);
  border:1px solid var(--border-strong);
  background:rgba(255,255,255,0.04);color:var(--text);outline:none;
}
body.light .searchRow input{background:rgba(20,26,43,0.03);}
.searchRow input:focus{border-color:var(--teal);}
.searchRow button, #calcBtn{
  padding:10px 16px;border:none;border-radius:var(--radius-sm);
  background:var(--grad);color:#0a0e1a;font-weight:600;cursor:pointer;
}

.muted{color:var(--text-muted);}
.small{font-size:12px;margin-top:10px;}

.calcResult{
  margin-top:16px;font-family:var(--font-mono);font-size:28px;
  text-align:right;color:var(--teal);
}

.sectionLabel{
  font-size:11px;text-transform:uppercase;letter-spacing:.08em;
  color:var(--text-muted);margin:16px 0 10px;
}
.sectionLabel:first-child{margin-top:0;}

.fileGrid{display:flex;gap:10px;flex-wrap:wrap;}
.fileGrid img{width:110px;height:110px;object-fit:cover;border-radius:var(--radius-sm);border:1px solid var(--border);cursor:pointer;transition:transform .15s;}
.fileGrid img:hover{transform:scale(1.04);}

.ghostBtn{
  padding:9px 14px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,0.04);
  border:1px solid var(--border-strong);
  color:var(--text);cursor:pointer;font-size:13px;
  transition:all .15s;
}
body.light .ghostBtn{background:rgba(20,26,43,0.03);}
.ghostBtn:hover{border-color:var(--teal);}
.ghostBtn.accent{background:var(--grad);color:#0a0e1a;border:none;font-weight:600;}

.wallRow{display:flex;gap:10px;}
.wallSwatch{
  width:60px;height:44px;border-radius:var(--radius-sm);
  background-size:cover;background-position:center;
  border:2px solid var(--border-strong);cursor:pointer;
}
.wallSwatch:hover{border-color:var(--teal);}

/* Terminal */
.window.terminal{background:#05060a;}
body.light .window.terminal{background:#0d1120;}
#output{height:220px;overflow:auto;padding:14px;font-family:var(--font-mono);font-size:12.5px;color:var(--teal);}
#output div{margin-bottom:4px;}
#cmd{
  width:100%;background:#0a0d16;color:var(--teal);border:none;
  border-top:1px solid rgba(45,212,191,0.15);
  padding:12px 14px;font-family:var(--font-mono);font-size:13px;outline:none;
}

/* Calendar */
.calNav{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;font-family:var(--font-display);font-weight:600;}
.calGrid{display:grid;grid-template-columns:repeat(7,1fr);gap:4px;text-align:center;font-size:12px;}
.calGrid .dow{color:var(--text-muted);font-size:10.5px;padding-bottom:6px;}
.calGrid .day{
  padding:8px 0;border-radius:var(--radius-sm);cursor:default;
}
.calGrid .day.today{background:var(--grad);color:#0a0e1a;font-weight:700;}
.calGrid .day.empty{opacity:0;}

/* Music */
.nowPlaying{text-align:center;padding:8px 0 4px;}
.viz{display:flex;justify-content:center;align-items:flex-end;gap:4px;height:40px;margin-bottom:12px;}
.viz span{width:5px;background:var(--grad);border-radius:3px;height:8px;transition:height .2s;}
.viz.playing span{animation:bounce 1s ease-in-out infinite;}
.viz span:nth-child(1){animation-delay:0s;}
.viz span:nth-child(2){animation-delay:.1s;}
.viz span:nth-child(3){animation-delay:.2s;}
.viz span:nth-child(4){animation-delay:.3s;}
.viz span:nth-child(5){animation-delay:.4s;}
@keyframes bounce{0%,100%{height:8px;}50%{height:34px;}}

#trackTitle{font-weight:600;margin:0 0 2px;}
.progressRow{display:flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11px;color:var(--text-muted);margin-bottom:14px;}
.progressTrack{flex:1;height:4px;border-radius:4px;background:var(--border-strong);overflow:hidden;}
.progressFill{height:100%;width:0%;background:var(--grad);transition:width .3s linear;}
.transport{display:flex;gap:8px;justify-content:center;margin-bottom:14px;}
.playlist{list-style:none;margin:0;padding:0;border-top:1px solid var(--border);}
.playlist li{
  display:flex;justify-content:space-between;padding:10px 4px;
  font-size:13px;cursor:pointer;border-bottom:1px solid var(--border);
  color:var(--text-muted);
}
.playlist li:hover{color:var(--text);}
.playlist li.active{color:var(--teal);font-weight:600;}

/* Weather */
.weatherContent{text-align:center;}
.weatherTemp{font-family:var(--font-display);font-size:56px;margin:6px 0 0;}

.timeDisplay{
  font-family:var(--font-mono);font-size:36px;text-align:center;
  margin:6px 0 18px;color:var(--teal);
}

@media (max-width:640px){
  .window{width:92vw !important;left:4vw !important;}
  #tabstrip{display:none;}
}