/* ============================================================
   PowerPointOS — Bootable Desktop (fullscreen overlay)
   ============================================================ */

#os {
  position: fixed; inset: 0; z-index: 200;
  display: none; opacity: 0;
  transition: opacity .5s ease;
  overflow: hidden;
  font-family: var(--font-body);
}
#os.open { display: block; opacity: 1; }

/* ---- Wallpaper ---- */
.os-wall {
  position: absolute; inset: 0;
  background: var(--bg-grad), var(--bg);
}
.os-wall::after {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(50% 40% at 50% 38%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%);
}
body[data-theme="b"] .os-wall::after { background: radial-gradient(60% 50% at 50% 40%, rgba(255,46,151,.14), transparent 70%); }
body[data-theme="c"] .os-wall { background-image:
    repeating-linear-gradient(0deg, transparent 0 2px, rgba(0,0,0,.18) 2px 3px),
    var(--bg-grad), var(--bg); }

.os-wall-logo {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  text-align: center; opacity: .5; pointer-events: none; user-select: none;
}
.os-wall-logo .m { width: 90px; height: 90px; margin: 0 auto 14px; opacity: .85; }
.os-wall-logo .t { font-family: var(--font-display); font-weight: var(--display-weight); font-size: 30px; letter-spacing: var(--display-spacing); text-transform: var(--display-transform); }
.os-wall-logo .s { font-family: var(--font-mono); font-size: 12px; letter-spacing: .3em; text-transform: uppercase; color: var(--text-faint); margin-top: 6px; }

/* ---- Top menu bar ---- */
.os-menubar {
  position: absolute; top: 0; left: 0; right: 0; height: 34px; z-index: 30;
  display: flex; align-items: center; gap: 18px; padding: 0 16px;
  background: color-mix(in srgb, var(--bg) 55%, transparent);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  border-bottom: 1px solid color-mix(in srgb, var(--text) 9%, transparent);
  font-size: 13px;
}
.os-menubar .mb-brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-family: var(--font-display); }
.os-menubar .mb-brand svg { width: 18px; height: 18px; }
.os-menubar .mb-item { color: var(--text-dim); cursor: default; }
.os-menubar .mb-right { margin-left: auto; display: flex; align-items: center; gap: 16px; color: var(--text-dim); font-family: var(--font-mono); font-size: 12px; }
.os-menubar .mb-right .status { color: var(--success); display: flex; align-items: center; gap: 6px; }
.os-exit {
  display: flex; align-items: center; gap: 7px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em;
  background: var(--panel-bg); border: var(--panel-border); color: var(--text);
  padding: 5px 12px; border-radius: 100px; cursor: pointer; transition: all .2s;
}
.os-exit:hover { border-color: var(--accent-2); color: var(--accent-2); }

/* ---- Desktop icons ---- */
.os-desktop { position: absolute; top: 50px; left: 18px; display: flex; flex-direction: column; flex-wrap: wrap; gap: 6px; max-height: calc(100% - 130px); z-index: 10; }
.os-icon {
  width: 92px; padding: 12px 6px 10px; border-radius: 12px;
  display: flex; flex-direction: column; align-items: center; gap: 9px;
  cursor: pointer; text-align: center; transition: background .15s;
  border: 1px solid transparent;
}
.os-icon:hover { background: var(--panel-bg); border: var(--panel-border); }
.os-icon .gi { width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; background: var(--panel-bg-strong); border: var(--panel-border); box-shadow: var(--panel-hi); color: var(--accent); }
.os-icon .gl { font-size: 11.5px; color: var(--text); font-family: var(--font-body); line-height: 1.25; text-shadow: 0 1px 4px rgba(0,0,0,.6); }

/* ---- Dock ---- */
.os-dock {
  position: absolute; bottom: 14px; left: 50%; transform: translateX(-50%);
  display: flex; align-items: flex-end; gap: 10px; padding: 10px 14px; z-index: 30;
  background: var(--panel-bg-strong);
  -webkit-backdrop-filter: blur(var(--panel-blur)); backdrop-filter: blur(var(--panel-blur));
  border: var(--panel-border); border-radius: 20px; box-shadow: var(--panel-hi), var(--shadow);
}
.dock-app {
  width: 48px; height: 48px; border-radius: 13px; cursor: pointer;
  display: grid; place-items: center; color: var(--accent);
  background: var(--panel-bg); border: var(--panel-border);
  transition: transform .2s var(--ease-spring);
  position: relative;
}
.dock-app:hover { transform: translateY(-10px) scale(1.12); }
.dock-app .tip {
  position: absolute; bottom: 60px; left: 50%; transform: translateX(-50%);
  background: var(--bg-2); color: var(--text); font-size: 11px; font-family: var(--font-mono);
  padding: 5px 9px; border-radius: 6px; white-space: nowrap; opacity: 0; pointer-events: none;
  border: var(--panel-border); transition: opacity .2s;
}
.dock-app:hover .tip { opacity: 1; }
.dock-app .run-dot { position: absolute; bottom: -6px; left: 50%; transform: translateX(-50%); width: 4px; height: 4px; border-radius: 50%; background: var(--success); opacity: 0; }
.dock-app.running .run-dot { opacity: 1; }
.dock-sep { width: 1px; height: 38px; align-self: center; background: color-mix(in srgb, var(--text) 14%, transparent); margin: 0 2px; }

/* ============================================================
   Windows
   ============================================================ */
.win {
  position: absolute; z-index: 20;
  min-width: 320px; min-height: 200px;
  background: var(--panel-bg-strong);
  -webkit-backdrop-filter: blur(var(--panel-blur)); backdrop-filter: blur(var(--panel-blur));
  border: var(--panel-border); border-radius: var(--window-radius);
  box-shadow: var(--panel-hi), var(--shadow);
  display: flex; flex-direction: column; overflow: hidden;
  opacity: 1; transform: none; transform-origin: center;
  animation: winIn .24s var(--ease-spring);
}
@keyframes winIn { from { transform: scale(.95); } to { transform: none; } }
.win.closing { opacity: 0; transform: scale(.94); transition: opacity .2s var(--ease-out), transform .2s var(--ease-out); }
.win-titlebar {
  height: 40px; flex: none; display: flex; align-items: center; gap: 10px;
  padding: 0 14px; cursor: grab; user-select: none;
  border-bottom: 1px solid color-mix(in srgb, var(--text) 9%, transparent);
  background: color-mix(in srgb, var(--bg) 30%, transparent);
}
.win-titlebar:active { cursor: grabbing; }
.win-dots { display: flex; gap: 8px; }
.win-dots span { width: 12px; height: 12px; border-radius: 50%; cursor: pointer; }
.win-dots .d-close { background: #ff5f57; }
.win-dots .d-min { background: #febc2e; }
.win-dots .d-max { background: #28c840; }
body[data-theme="b"] .win-dots span, body[data-theme="c"] .win-dots span { border-radius: 2px; }
.win-title { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .04em; color: var(--text-dim); display: flex; align-items: center; gap: 8px; }
.win-title svg { width: 15px; height: 15px; color: var(--accent); }
.win-body { flex: 1; overflow: auto; position: relative; }

/* ---- Terminal app ---- */
.term { font-family: var(--font-mono); font-size: 13.5px; line-height: 1.55; padding: 16px; height: 100%; overflow-y: auto; background: color-mix(in srgb, #000 35%, var(--bg-2)); cursor: text; }
.term .ln { white-space: pre-wrap; word-break: break-word; margin: 1px 0; }
.term .ps { color: var(--accent); }
.term .ok { color: var(--success); }
.term .cmd-txt { color: var(--text); }
.term .hint { color: var(--text-faint); }
.term-input-row { display: flex; align-items: baseline; }
.term-input-row .ps { margin-right: 8px; }
.term-input { flex: 1; background: transparent; border: none; outline: none; color: var(--text); font-family: var(--font-mono); font-size: 13.5px; caret-color: var(--accent); }

/* ---- New Project app ---- */
.np { padding: 22px; }
.np h3 { font-family: var(--font-display); font-size: 18px; margin: 0 0 4px; letter-spacing: var(--display-spacing); }
.np .sub { color: var(--text-dim); font-size: 13px; margin: 0 0 18px; }
.np-templates { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.np-tpl {
  padding: 16px; border-radius: var(--radius); cursor: pointer;
  background: var(--panel-bg); border: var(--panel-border); transition: all .2s;
  display: flex; gap: 12px; align-items: flex-start;
}
.np-tpl:hover { border-color: var(--accent); transform: translateY(-2px); }
.np-tpl .ti { width: 34px; height: 34px; border-radius: 9px; background: var(--grad-soft); display: grid; place-items: center; color: var(--accent); flex: none; }
.np-tpl .tt { font-family: var(--font-display); font-size: 14px; font-weight: 600; }
.np-tpl .td { font-size: 11.5px; color: var(--text-faint); margin-top: 3px; }
.np-build { padding: 4px 2px; }
.np-build .npb-name { font-family: var(--font-mono); font-size: 13px; color: var(--accent); margin-bottom: 10px; }
.np-steps { font-family: var(--font-mono); font-size: 12.5px; min-height: 150px; }
.np-steps .s { margin: 5px 0; color: var(--text-dim); opacity: .3; transition: opacity .25s; }
.np-steps .s.on { opacity: 1; }
.np-steps .s.on::before { content: "✓ "; color: var(--success); }
.np-done { text-align: center; padding: 14px; }
.np-done .big { font-family: var(--font-display); font-size: 22px; font-weight: 700; margin: 8px 0; }
.np-done .tags { display: flex; flex-wrap: wrap; gap: 7px; justify-content: center; margin-top: 14px; }
.np-done .tags span { font-family: var(--font-mono); font-size: 11px; padding: 5px 11px; border-radius: 100px; background: var(--grad-soft); border: var(--panel-border); color: var(--success); }

/* ---- Generic app content ---- */
.app-pad { padding: 22px; }
.app-pad h3 { font-family: var(--font-display); font-size: 17px; margin: 0 0 12px; letter-spacing: var(--display-spacing); }

/* Task manager */
.tm-row { display: grid; grid-template-columns: 1.6fr .8fr .8fr 1fr; gap: 10px; padding: 11px 14px; align-items: center; font-size: 13px; border-bottom: 1px solid color-mix(in srgb, var(--text) 7%, transparent); }
.tm-row.head { color: var(--text-faint); font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.tm-row .proc { display: flex; align-items: center; gap: 9px; font-family: var(--font-mono); }
.tm-bar { height: 6px; border-radius: 100px; background: color-mix(in srgb, var(--text) 12%, transparent); overflow: hidden; }
.tm-bar > i { display: block; height: 100%; background: var(--success); border-radius: 100px; }
.tm-foot { padding: 14px; font-family: var(--font-mono); font-size: 12px; color: var(--text-dim); }

/* Meeting */
.meet { padding: 0; }
.meet-stage { aspect-ratio: 16/9; background: color-mix(in srgb, #000 45%, var(--bg-2)); display: grid; grid-template-columns: repeat(3,1fr); grid-template-rows: repeat(2,1fr); gap: 4px; padding: 4px; }
.meet-tile { background: var(--panel-bg); border-radius: 8px; display: grid; place-items: center; position: relative; overflow: hidden; }
.meet-tile .ava { width: 46px; height: 46px; border-radius: 50%; background: var(--grad-soft); display: grid; place-items: center; font-family: var(--font-mono); font-size: 15px; color: var(--accent); }
.meet-tile .nmtag { position: absolute; bottom: 6px; left: 6px; font-size: 10px; font-family: var(--font-mono); background: rgba(0,0,0,.5); padding: 2px 6px; border-radius: 4px; color: var(--text); }
.meet-tile .mute { position: absolute; bottom: 6px; right: 6px; font-size: 11px; color: var(--accent-2); }
.meet-bar { display: flex; align-items: center; justify-content: center; gap: 12px; padding: 14px; }
.meet-clock { position: absolute; top: 8px; left: 8px; font-family: var(--font-mono); font-size: 11px; background: rgba(0,0,0,.55); padding: 3px 8px; border-radius: 5px; color: var(--success); z-index: 2; }
.meet-ctrl { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; background: var(--panel-bg); border: var(--panel-border); color: var(--text); cursor: pointer; transition: all .2s; }
.meet-ctrl:hover { border-color: var(--accent); color: var(--accent); }
.meet-leave { background: #ff5f57; color: #2a0000; border: none; border-radius: 100px; padding: 0 18px; height: 44px; font-family: var(--font-display); font-weight: 600; cursor: pointer; font-size: 13px; }

/* Recycle / Out of Scope */
.bin { padding: 20px; min-height: 240px; }
.bin-drop { border: 2px dashed color-mix(in srgb, var(--text) 22%, transparent); border-radius: var(--radius); padding: 26px; text-align: center; color: var(--text-dim); transition: all .2s; margin-bottom: 16px; }
.bin-drop.over { border-color: var(--accent); background: var(--grad-soft); color: var(--text); }
.bin-items { display: flex; flex-direction: column; gap: 8px; }
.bin-chip { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 11px 14px; border-radius: var(--btn-radius); background: var(--panel-bg); border: var(--panel-border); cursor: grab; font-size: 13px; }
.bin-chip .tag { font-family: var(--font-mono); font-size: 10px; color: var(--success); }
.bin-chip.dragging { opacity: .4; }

/* Antivirus */
.av { padding: 26px; text-align: center; }
.av-ring { width: 150px; height: 150px; margin: 6px auto 18px; border-radius: 50%; display: grid; place-items: center; position: relative; background: conic-gradient(var(--success) 0deg, color-mix(in srgb, var(--text) 12%, transparent) 0deg); transition: background .8s var(--ease-out); }
.av-ring .inner { width: 122px; height: 122px; border-radius: 50%; background: var(--bg-2); display: grid; place-items: center; flex-direction: column; }
.av-ring .pct { font-family: var(--font-display); font-size: 30px; font-weight: 700; }
.av-status { font-family: var(--font-mono); font-size: 13px; color: var(--text-dim); margin: 4px 0 18px; min-height: 20px; }
.av-status.safe { color: var(--success); }

/* Settings */
.set-row { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 14px 4px; border-bottom: 1px solid color-mix(in srgb, var(--text) 7%, transparent); }
.set-row .sl { font-size: 14px; }
.set-row .sd { font-size: 11.5px; color: var(--text-faint); margin-top: 2px; font-family: var(--font-mono); }
.toggle { width: 46px; height: 27px; border-radius: 100px; background: var(--success); position: relative; cursor: pointer; flex: none; box-shadow: inset 0 0 0 1px rgba(255,255,255,.2); }
.toggle::after { content: ""; position: absolute; top: 3px; left: 22px; width: 21px; height: 21px; border-radius: 50%; background: #fff; transition: left .25s var(--ease-spring); box-shadow: 0 1px 3px rgba(0,0,0,.4); }
.toggle.snap::after { left: 3px; }
.set-slider { width: 150px; height: 6px; border-radius: 100px; background: color-mix(in srgb, var(--text) 14%, transparent); position: relative; }
.set-slider::after { content: ""; position: absolute; left: 0; top: 0; height: 100%; width: 16%; background: var(--grad); border-radius: 100px; }
.set-slider .knob { position: absolute; left: 16%; top: 50%; transform: translate(-50%,-50%); width: 18px; height: 18px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.4); cursor: pointer; }
.set-easy { font-family: var(--font-mono); font-size: 11px; color: var(--success); margin-left: 8px; }

/* ============================================================
   System dialogs
   ============================================================ */
.dlg-scrim { position: absolute; inset: 0; z-index: 80; display: grid; place-items: center; background: rgba(0,0,0,.4); -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px); opacity: 0; pointer-events: none; transition: opacity .25s; }
.dlg-scrim.show { opacity: 1; pointer-events: auto; }
.dlg { width: min(420px, 90%); padding: 26px; border-radius: var(--radius-lg); background: var(--panel-bg-strong); -webkit-backdrop-filter: blur(var(--panel-blur)); backdrop-filter: blur(var(--panel-blur)); border: var(--panel-border); box-shadow: var(--panel-hi), var(--shadow); transform: scale(.92); transition: transform .25s var(--ease-spring); text-align: center; }
.dlg-scrim.show .dlg { transform: scale(1); }
.dlg .dicon { width: 54px; height: 54px; border-radius: 14px; margin: 0 auto 16px; display: grid; place-items: center; background: var(--grad-soft); color: var(--success); }
.dlg h3 { font-family: var(--font-display); font-size: 20px; margin: 0 0 8px; letter-spacing: var(--display-spacing); }
.dlg p { color: var(--text-dim); font-size: 14px; margin: 0 0 22px; line-height: 1.5; }
.dlg-btns { display: flex; gap: 10px; justify-content: center; }

/* Blue Slide of Success */
.bsos { position: absolute; inset: 0; z-index: 90; background: linear-gradient(160deg, #1763d8, #0a3e9c); color: #fff; display: none; flex-direction: column; justify-content: center; padding: 8% 10%; opacity: 0; transition: opacity .4s; }
body[data-theme="b"] .bsos { background: linear-gradient(160deg, #00303a, #052b3a); }
body[data-theme="c"] .bsos { background: linear-gradient(160deg, #3a1763, #5a1d6e); }
.bsos.show { display: flex; opacity: 1; }
.bsos .bsos-face { font-size: 64px; font-family: var(--font-display); font-weight: 300; line-height: 1; margin-bottom: 24px; }
.bsos h2 { font-family: var(--font-display); font-size: clamp(22px, 3vw, 34px); font-weight: 400; margin: 0 0 18px; max-width: 22ch; line-height: 1.2; }
.bsos p { font-size: 15px; opacity: .85; max-width: 50ch; margin: 0 0 8px; font-family: var(--font-mono); }
.bsos .bsos-bar { margin-top: 26px; max-width: 360px; }
.bsos .bsos-hint { margin-top: 22px; font-size: 13px; opacity: .7; font-family: var(--font-mono); }

/* ---- Boot sequence ---- */
#boot { position: fixed; inset: 0; z-index: 300; background: #04060b; color: var(--text); display: none; flex-direction: column; justify-content: center; align-items: flex-start; padding: 0 max(8vw, 40px); font-family: var(--font-mono); }
#boot.show { display: flex; }
.boot-logo { display: flex; align-items: center; gap: 16px; margin-bottom: 40px; }
.boot-logo svg { width: 54px; height: 54px; }
.boot-logo .bt { font-family: var(--font-display); font-size: 30px; font-weight: 700; letter-spacing: -.01em; }
.boot-lines { font-size: 15px; line-height: 2; min-height: 260px; width: 100%; max-width: 620px; }
.boot-line { opacity: 1; color: var(--text-dim); }
.boot-line.in { animation: bootIn .3s ease; }
.boot-line .ok { color: var(--success); }
@keyframes bootIn { from { transform: translateX(-10px); } to { transform: none; } }
.boot-prompt { margin-top: 32px; font-size: 17px; color: var(--accent); opacity: 0; }
.boot-prompt.in { opacity: 1; animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .4; } }
.boot-skip { position: absolute; bottom: 28px; right: 32px; font-size: 12px; color: var(--text-faint); background: none; border: 1px solid color-mix(in srgb, var(--text) 18%, transparent); padding: 8px 14px; border-radius: 100px; cursor: pointer; font-family: var(--font-mono); transition: all .2s; }
.boot-skip:hover { color: var(--text); border-color: var(--text); }
.boot-bar { width: 100%; max-width: 620px; height: 4px; border-radius: 100px; background: rgba(255,255,255,.1); overflow: hidden; margin-top: 30px; }
.boot-bar > i { display: block; height: 100%; width: 0; background: var(--grad); border-radius: 100px; transition: width .3s linear; }

/* confetti canvas */
#confetti { position: fixed; inset: 0; z-index: 250; pointer-events: none; display: none; }
#confetti.on { display: block; }

@media (max-width: 680px){
  .os-desktop { flex-direction: row; top: 44px; gap: 2px; max-height: 150px; }
  .os-icon { width: 80px; }
  .win { left: 12px !important; right: 12px; top: 70px !important; width: auto !important; max-width: none; }
  .meet-stage { grid-template-columns: repeat(2,1fr); grid-template-rows: repeat(3,1fr); }
  .np-templates { grid-template-columns: 1fr; }
}