/* ===== Midnight OS — animated wallpaper + Settings ===== */
#wall { position: absolute; inset: 0; overflow: hidden; pointer-events: none;
  --base: #05060b; --b1: rgba(88,112,220,.55); --b2: rgba(150,90,255,.42); --b3: rgba(40,200,190,.34); --dim: 0;
  background-color: var(--base); background-size: cover; background-position: center; }
#wall .wb, #wall .rib, #wall .sheen { position: absolute; will-change: transform; }
#wall .wb { border-radius: 50%; }
#wall .wb1 { width: 80vmax; height: 80vmax; left: -22vmax; top: -38vmax; background: radial-gradient(closest-side, var(--b1), transparent); animation: wbA 28s ease-in-out infinite alternate; }
#wall .wb2 { width: 70vmax; height: 70vmax; right: -26vmax; top: 2vmax; background: radial-gradient(closest-side, var(--b2), transparent); animation: wbB 34s ease-in-out infinite alternate; }
#wall .wb3 { width: 75vmax; height: 75vmax; left: 6vmax; bottom: -46vmax; background: radial-gradient(closest-side, var(--b3), transparent); animation: wbC 40s ease-in-out infinite alternate; }
@keyframes wbA { from { transform: translate(0,0) scale(1); } to { transform: translate(18vmax, 10vmax) scale(1.18); } }
@keyframes wbB { from { transform: translate(0,0) scale(1.1); } to { transform: translate(-16vmax, 14vmax) scale(.92); } }
@keyframes wbC { from { transform: translate(0,0) scale(.95); } to { transform: translate(14vmax, -12vmax) scale(1.16); } }

/* aurora ribbons */
#wall .rib { left: -25%; width: 150%; height: 34vmax; border-radius: 50%; opacity: .55; mix-blend-mode: screen; }
#wall .rib1 { top: 8%; background: radial-gradient(closest-side, var(--b3), transparent); transform: rotate(-14deg); animation: ribA 24s ease-in-out infinite alternate; }
#wall .rib2 { top: 34%; height: 26vmax; opacity: .4; background: radial-gradient(closest-side, var(--b2), transparent); transform: rotate(9deg); animation: ribB 30s ease-in-out infinite alternate; }
@keyframes ribA { from { transform: rotate(-14deg) translate(-6%, 0) scaleY(1); } to { transform: rotate(-8deg) translate(6%, 7%) scaleY(1.35); } }
@keyframes ribB { from { transform: rotate(9deg) translate(5%, 0) scaleY(1.2); } to { transform: rotate(14deg) translate(-7%, -6%) scaleY(.8); } }

#wall .sheen { inset: -20% -40%; background: linear-gradient(115deg, transparent 38%, rgba(190,210,255,.07) 50%, transparent 62%); animation: sheen 22s linear infinite; }
@keyframes sheen { from { transform: translateX(-30%); } to { transform: translateX(30%); } }

#wall .dim { position: absolute; inset: 0; background: #000; opacity: var(--dim); }
#wall.static .wb, #wall.static .rib, #wall.static .sheen { animation: none; }
#wall.custom .wb, #wall.custom .rib, #wall.custom .sheen { display: none; }

/* taskbar gear */
.tk-gear { appearance: none; background: transparent; border: 0; width: 34px; height: 34px; border-radius: 9px; margin-right: 2px;
  display: grid; place-items: center; color: #aeb8d0; cursor: pointer; transition: background .15s, color .15s; }
.tk-gear:hover { background: rgba(255,255,255,0.07); color: #fff; }
.tk-gear svg { width: 18px; height: 18px; }

/* settings window */
.setw { height: 100%; overflow: auto; padding: 26px 26px 34px; -webkit-overflow-scrolling: touch;
  background: radial-gradient(560px 320px at 10% -8%, rgba(110,135,255,0.16), transparent 70%),
              radial-gradient(480px 300px at 100% 0%, rgba(168,100,255,0.11), transparent 70%), #090b11; color: #e9edf5; }
.setw h2 { font-size: 24px; font-weight: 650; letter-spacing: -0.02em; color: #f4f6fc; margin-bottom: 20px; }
.set-card { background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02)); border: 1px solid rgba(255,255,255,0.07);
  border-radius: 18px; padding: 18px; margin-bottom: 16px; }
.set-card h3 { font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: #8b95ad; font-weight: 600; margin-bottom: 14px; }

.set-walls { display: grid; grid-template-columns: repeat(auto-fill, minmax(118px, 1fr)); gap: 12px; }
.wp { appearance: none; background: transparent; border: 0; padding: 0; cursor: pointer; color: #d6dcec; font: inherit; font-size: 12.5px;
  display: flex; flex-direction: column; gap: 7px; text-align: center; }
.wp .th { position: relative; width: 100%; aspect-ratio: 16 / 10; border-radius: 12px; border: 2px solid rgba(255,255,255,0.08); overflow: hidden;
  background-size: cover; background-position: center; transition: transform .18s, border-color .18s, box-shadow .18s; }
.wp:hover .th { transform: translateY(-2px); border-color: rgba(255,255,255,0.2); }
.wp.on .th { border-color: #8eb0ff; box-shadow: 0 0 0 3px rgba(142,176,255,0.22); }
.wp.on .th::after { content: "✓"; position: absolute; right: 6px; top: 6px; width: 20px; height: 20px; border-radius: 50%; background: #8eb0ff; color: #0a0d16;
  font-size: 12px; font-weight: 700; display: grid; place-items: center; }
.wp.up .th { display: grid; place-items: center; border-style: dashed; border-color: rgba(255,255,255,0.22); background: rgba(255,255,255,0.03); font-size: 26px; color: #9aa6c4; }
.wp:focus-visible .th { outline: 2px solid rgba(255,255,255,.7); outline-offset: 2px; }

.set-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; align-items: center; }
.set-btn { appearance: none; border: 1px solid rgba(255,255,255,0.12); background: rgba(255,255,255,0.06); color: #eef1f8; font: inherit; font-size: 14px;
  padding: 9px 16px; border-radius: 11px; cursor: pointer; transition: background .15s, transform .15s; }
.set-btn:hover { background: rgba(255,255,255,0.11); }
.set-btn:active { transform: scale(.97); }
.set-btn.pri { background: linear-gradient(180deg, #7d9cff, #5a78e6); border-color: transparent; color: #0a0d16; font-weight: 600; }
.set-btn.danger { color: #ff9a9a; }
.set-note { font-size: 12.5px; color: #8b95ad; }

.set-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 0; border-top: 1px solid rgba(255,255,255,0.06); }
.set-card h3 + .set-row { border-top: 0; padding-top: 0; }
.set-row .lb b { display: block; font-weight: 500; font-size: 15px; color: #eef1f8; }
.set-row .lb span { font-size: 12.5px; color: #8b95ad; }

.tgl { position: relative; flex: none; width: 46px; height: 27px; }
.tgl input { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; z-index: 1; }
.tgl i { position: absolute; inset: 0; border-radius: 14px; background: rgba(255,255,255,0.14); transition: background .2s; }
.tgl i::after { content: ""; position: absolute; left: 3px; top: 3px; width: 21px; height: 21px; border-radius: 50%; background: #fff; transition: transform .2s cubic-bezier(.3,.8,.3,1); box-shadow: 0 2px 6px rgba(0,0,0,.4); }
.tgl input:checked + i { background: #6f8dff; }
.tgl input:checked + i::after { transform: translateX(19px); }
.tgl input:focus-visible + i { outline: 2px solid rgba(255,255,255,.7); outline-offset: 2px; }

.set-range { width: 150px; -webkit-appearance: none; appearance: none; height: 5px; border-radius: 5px; background: rgba(255,255,255,0.15); outline: none; }
.set-range::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%; background: #fff; box-shadow: 0 2px 6px rgba(0,0,0,.5); }
.set-range::-moz-range-thumb { width: 20px; height: 20px; border: 0; border-radius: 50%; background: #fff; }

.set-sel { flex: none; appearance: none; -webkit-appearance: none; background: rgba(255,255,255,0.07) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%23aeb8d0' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E") no-repeat right 12px center;
  border: 1px solid rgba(255,255,255,0.12); color: #eef1f8; font: inherit; font-size: 15px; padding: 9px 34px 9px 14px; border-radius: 11px; cursor: pointer; }
.set-sel option { background: #12151d; color: #eef1f8; }