* { box-sizing: border-box; margin: 0; padding: 0; }
html, body, #root { height: 100%; overflow: hidden; }
body { font-family: 'Bricolage Grotesque', sans-serif; color: #f1f1f5; -webkit-user-select: none; user-select: none; }

/* ---- BOOT ---- */
.boot {
  position: fixed; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 14px;
  background: radial-gradient(circle at 50% 40%, #2a1a3e, #0a0510);
  z-index: 9999;
}
.boot-logo { font-size: 90px; animation: pulse 1.4s ease-in-out infinite; }
.boot-title { font-size: 42px; font-weight: 800; letter-spacing: -1px; }
.boot-bar { width: 240px; height: 6px; background: rgba(255,255,255,.15); border-radius: 99px; overflow: hidden; }
.boot-fill { height: 100%; background: linear-gradient(90deg,#ff5ca8,#a855f7); transition: width .25s; }
.boot-msg { font-size: 13px; opacity: .6; font-family: 'JetBrains Mono', monospace; }
.boot-foot a { font-size: 11px; opacity: .35; color: #ff9ecb; text-decoration: none; }
@keyframes pulse { 0%,100%{ transform: scale(1); } 50%{ transform: scale(1.12); } }

/* ---- DESKTOP ---- */
.os-desktop { position: fixed; inset: 0; overflow: hidden; }
.clock-widget {
  position: absolute; top: 16px; right: 20px; text-align: right;
  text-shadow: 0 1px 4px rgba(0,0,0,.5); pointer-events: none;
}
.desktop-icons { position: absolute; top: 16px; left: 12px; display: flex; flex-direction: column; gap: 6px; }
.desk-icon {
  display: flex; flex-direction: column; align-items: center; width: 80px; padding: 8px 4px;
  border-radius: 10px; background: transparent; border: none; color: #fff; cursor: pointer;
  text-shadow: 0 1px 3px rgba(0,0,0,.6); transition: background .15s;
}
.desk-icon:hover { background: rgba(255,255,255,.12); }

/* ---- WINDOW ---- */
.os-window {
  position: absolute; display: flex; flex-direction: column;
  background: rgba(30,28,44,.82); backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,.12); border-radius: 14px; overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.5); animation: winpop .18s ease-out;
}
.os-window-focused { border-color: rgba(255,92,168,.5); box-shadow: 0 24px 70px rgba(0,0,0,.6); }
@keyframes winpop { from { transform: scale(.94); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.os-titlebar {
  display: flex; align-items: center; gap: 8px; padding: 8px 10px; cursor: move;
  background: rgba(255,255,255,.06); border-bottom: 1px solid rgba(255,255,255,.08);
}
.win-ctl {
  width: 24px; height: 24px; border-radius: 6px; border: none; background: rgba(255,255,255,.1);
  color: #fff; cursor: pointer; font-size: 11px; display: flex; align-items: center; justify-content: center;
}
.win-ctl:hover { background: rgba(255,255,255,.22); }
.win-close:hover { background: #ef4444; }
.os-resize {
  position: absolute; right: 0; bottom: 0; width: 18px; height: 18px; cursor: nwse-resize;
  background: linear-gradient(135deg, transparent 50%, rgba(255,255,255,.3) 50%);
}

/* ---- CALCULATOR ---- */
.calc-display {
  background: rgba(0,0,0,.35); border-radius: 10px; padding: 16px; margin-bottom: 10px;
  text-align: right; font-size: 30px; font-family: 'JetBrains Mono', monospace; overflow: hidden;
}
.calc-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 8px; flex: 1; }
.calc-btn {
  border: none; border-radius: 10px; background: rgba(255,255,255,.1); color: #fff;
  font-size: 18px; cursor: pointer; transition: background .1s; min-height: 44px;
}
.calc-btn:hover { background: rgba(255,255,255,.2); }
.calc-btn:active { transform: scale(.95); }
.calc-op { background: rgba(168,85,247,.35); }
.calc-fn { background: rgba(255,255,255,.05); color: #ff9ecb; }
.calc-eq { background: rgba(255,92,168,.5); }

/* ---- TOOL BUTTONS ---- */
.tool-btn {
  padding: 6px 12px; border-radius: 8px; border: none; background: rgba(255,255,255,.12);
  color: #fff; cursor: pointer; font-size: 13px; transition: background .1s;
}
.tool-btn:hover { background: rgba(255,255,255,.22); }
.tool-btn:active { transform: scale(.96); }
.tool-btn:disabled { opacity: .5; cursor: wait; }

/* ---- FILES ---- */
.file-tile {
  display: flex; flex-direction: column; align-items: center; padding: 16px 8px;
  border-radius: 12px; background: rgba(255,255,255,.06); border: none; color: #fff; cursor: pointer;
}
.file-tile:hover { background: rgba(255,255,255,.14); }

/* ---- TASKBAR ---- */
.taskbar {
  position: absolute; left: 0; right: 0; bottom: 0; height: 52px; display: flex; align-items: center;
  gap: 8px; padding: 0 8px; background: rgba(20,18,30,.75); backdrop-filter: blur(20px);
  border-top: 1px solid rgba(255,255,255,.1); z-index: 5000;
}
.start-btn {
  display: flex; align-items: center; gap: 6px; padding: 8px 14px; border-radius: 10px; border: none;
  background: rgba(255,92,168,.25); color: #fff; cursor: pointer; font-weight: 600; font-size: 14px;
}
.start-btn:hover { background: rgba(255,92,168,.4); }
.start-btn-active { background: rgba(255,92,168,.55); }
.task-apps { display: flex; gap: 6px; flex: 1; overflow-x: auto; }
.task-btn {
  display: flex; align-items: center; gap: 6px; padding: 6px 10px; border-radius: 8px; border: none;
  background: rgba(255,255,255,.08); color: #fff; cursor: pointer; white-space: nowrap;
}
.task-btn:hover { background: rgba(255,255,255,.18); }
.task-btn-active { background: rgba(255,255,255,.22); border-bottom: 2px solid #ff5ca8; }
.tray { display: flex; align-items: center; gap: 8px; padding-right: 6px; }

/* ---- START MENU ---- */
.start-menu {
  position: absolute; left: 8px; bottom: 58px; width: 300px; max-width: 92vw;
  background: rgba(25,22,38,.92); backdrop-filter: blur(24px); border: 1px solid rgba(255,255,255,.12);
  border-radius: 16px; padding: 14px; z-index: 6000; box-shadow: 0 20px 50px rgba(0,0,0,.6);
  animation: slideup .2s ease-out;
}
@keyframes slideup { from { transform: translateY(12px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.start-header { display: flex; align-items: center; gap: 10px; padding: 6px 6px 12px; border-bottom: 1px solid rgba(255,255,255,.1); }
.start-apps { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; margin: 10px 0; }
.start-app {
  display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 8px; border: none;
  background: transparent; color: #fff; cursor: pointer; text-align: left;
}
.start-app:hover { background: rgba(255,255,255,.12); }
.start-foot { display: flex; gap: 6px; border-top: 1px solid rgba(255,255,255,.1); padding-top: 10px; }
.start-power {
  flex: 1; padding: 8px; border-radius: 8px; border: none; background: rgba(255,255,255,.08);
  color: #fff; cursor: pointer; font-size: 13px;
}
.start-power:hover { background: rgba(255,255,255,.18); }

/* ---- CONTEXT MENU ---- */
.ctx-menu {
  position: absolute; z-index: 7000; background: rgba(25,22,38,.95); backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,.12); border-radius: 10px; padding: 4px; min-width: 170px;
  box-shadow: 0 12px 30px rgba(0,0,0,.5);
}
.ctx-item {
  display: block; width: 100%; text-align: left; padding: 8px 12px; border-radius: 6px;
  border: none; background: transparent; color: #fff; cursor: pointer; font-size: 13px;
}
.ctx-item:hover { background: rgba(255,92,168,.3); }

/* ---- TOAST ---- */
.os-toast {
  position: absolute; right: 16px; bottom: 64px; z-index: 8000; display: flex; align-items: center; gap: 8px;
  background: rgba(25,22,38,.95); backdrop-filter: blur(16px); border: 1px solid rgba(255,255,255,.15);
  border-radius: 12px; padding: 12px 16px; font-size: 13px; max-width: 280px;
  box-shadow: 0 12px 30px rgba(0,0,0,.5); animation: slideup .3s ease-out;
}

input[type=range] { accent-color: #ff5ca8; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,.2); border-radius: 8px; }