#pc-os-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #020308;
    pointer-events: auto;
    font-family: Inter, Segoe UI, system-ui, sans-serif;
    color: #f5f8ff;
    opacity: 1;
    transition: opacity 0.18s ease;
}

#pc-os-overlay.pc-hidden {
    display: none;
}

#pc-os-overlay.pc-closing {
    opacity: 0;
    pointer-events: none;
}

body.pc-open #hud,
body.pc-open #pause-overlay {
    display: none !important;
}

.pc-shell {
    width: 100vw;
    height: 100vh;
    min-height: 0;
    background: #05070b;
    border: 0;
    box-shadow: none;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.pc-frame-top {
    height: 34px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 12px;
    color: rgba(245, 248, 255, 0.82);
    background: linear-gradient(180deg, #161b25, #090c12);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    font-size: 13px;
}

.pc-frame-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent, #4cc9ff);
    box-shadow: 0 0 18px var(--accent, #4cc9ff);
}

.pc-close {
    margin: 0 0 0 auto;
    padding: 5px 12px;
    border: 0;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    font-size: 13px;
}

.pc-close:hover {
    background: rgba(255, 255, 255, 0.18);
}

.pc-os-root {
    position: relative;
    flex: 1;
    overflow: hidden;
    --accent: #4cc9ff;
    --panel: rgba(11, 16, 28, 0.78);
    --panel-strong: rgba(15, 22, 38, 0.95);
    --text: #f5f8ff;
    --muted: rgba(245, 248, 255, 0.68);
    --line: rgba(255, 255, 255, 0.16);
    --field: rgba(255, 255, 255, 0.1);
}

.pc-os-root.w12-light {
    --panel: rgba(245, 249, 255, 0.74);
    --panel-strong: rgba(255, 255, 255, 0.94);
    --text: #101522;
    --muted: rgba(16, 21, 34, 0.62);
    --line: rgba(16, 21, 34, 0.14);
    --field: rgba(16, 21, 34, 0.08);
    color: var(--text);
}

.pc-os-root button,
.pc-os-root input,
.pc-os-root select,
.pc-os-root textarea {
    font: inherit;
}

.pc-os-root button {
    margin: 0;
    border: 1px solid var(--line);
    border-radius: 7px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text);
    cursor: pointer;
}

.pc-os-root button:hover {
    border-color: color-mix(in srgb, var(--accent), white 25%);
    background: rgba(255, 255, 255, 0.16);
}

.pc-os-root button:disabled,
.pc-os-root input:disabled,
.pc-os-root select:disabled,
.pc-os-root textarea:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.pc-os-root input,
.pc-os-root select,
.pc-os-root textarea {
    color: var(--text);
    background: var(--field);
    border: 1px solid var(--line);
    border-radius: 7px;
    outline: 0;
}

.pc-os-root input:focus,
.pc-os-root select:focus,
.pc-os-root textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent), transparent 68%);
}

.wallpaper-aurora,
.wallpaper-grid,
.wallpaper-circuit,
.wallpaper-sunrise {
    background-size: cover;
    background-position: center;
}

.wallpaper-aurora {
    background:
        radial-gradient(circle at 78% 18%, color-mix(in srgb, var(--accent, #4cc9ff), transparent 62%), transparent 26%),
        linear-gradient(135deg, #0d1028 0%, #243b76 48%, #3b0d54 100%);
}

.wallpaper-circuit {
    background:
        repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.07) 0 1px, transparent 1px 60px),
        radial-gradient(circle at 22% 82%, color-mix(in srgb, var(--accent, #4cc9ff), transparent 70%), transparent 28%),
        linear-gradient(135deg, #06131f, #10284d 52%, #210b38);
}

.wallpaper-sunrise {
    background:
        radial-gradient(circle at 30% 20%, rgba(255, 236, 180, 0.45), transparent 22%),
        linear-gradient(135deg, #f8c38b, #d47093 46%, #1a2f68);
}

.wallpaper-grid {
    background:
        linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px),
        linear-gradient(135deg, #08111e, #111827 58%, #050810);
    background-size: 46px 46px, 46px 46px, cover;
}

.w12-power,
.w12-login,
.w12-installer,
.w12-setup,
.w12-boot,
.w12-nosignal,
.w12-sleep {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.power-card,
.installer-card,
.setup-panel,
.login-card,
.nosignal-card {
    width: min(520px, calc(100% - 48px));
    padding: 28px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
    backdrop-filter: blur(22px);
}

.power-card h1,
.installer-card h1,
.setup-panel h1,
.login-card h1 {
    margin: 0 0 10px;
    font-size: 36px;
    line-height: 1.05;
}

.power-card p,
.installer-card p,
.setup-panel p,
.login-card p {
    color: var(--muted);
}

.power-orb {
    width: 86px;
    height: 86px;
    border-radius: 50%;
    margin-bottom: 18px;
    background: radial-gradient(circle at 34% 34%, #fff, var(--accent) 28%, #122044 70%);
    box-shadow: 0 0 36px color-mix(in srgb, var(--accent), transparent 30%);
}

.power-row,
.installer-actions,
.seg-row,
.swatch-row,
.wallpaper-row,
.quick-grid {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.power-row button,
.installer-actions button,
.login-card button {
    padding: 10px 14px;
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--accent) !important;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 12px;
    font-weight: 700;
}

.w12-boot {
    flex-direction: column;
    background: radial-gradient(circle at 50% 34%, #1b315c, #020308 64%);
}

.boot-mark {
    width: 96px;
    height: 96px;
    display: grid;
    place-items: center;
    border: 2px solid var(--accent);
    border-radius: 18px;
    color: var(--accent);
    font-size: 42px;
    font-weight: 800;
    box-shadow: 0 0 40px color-mix(in srgb, var(--accent), transparent 45%);
}

.boot-spinner {
    display: flex;
    gap: 8px;
    margin: 20px 0;
}

.boot-spinner span {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--accent);
    animation: bootPulse 1s infinite ease-in-out;
}

.boot-spinner span:nth-child(2) { animation-delay: 0.12s; }
.boot-spinner span:nth-child(3) { animation-delay: 0.24s; }
.boot-spinner span:nth-child(4) { animation-delay: 0.36s; }

@keyframes bootPulse {
    0%, 80%, 100% { opacity: 0.25; transform: translateY(0); }
    40% { opacity: 1; transform: translateY(-6px); }
}

.boot-menu-panel button {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 14px;
    margin-top: 10px;
    text-align: left;
}

.boot-menu-panel button span {
    color: var(--muted);
    font-size: 13px;
}

.firmware-panel {
    width: min(900px, calc(100% - 48px));
}

.firmware-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.firmware-grid section,
.settings-app section,
.taskmgr-app section,
.store-app article,
.games-app article {
    padding: 14px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.firmware-grid button,
.settings-app button,
.quick-panel button {
    width: 100%;
    padding: 10px;
    margin-top: 8px;
}

.toggle-row {
    display: flex !important;
    align-items: center;
    justify-content: space-between;
    text-transform: capitalize;
}

.toggle-row strong {
    color: var(--accent);
}

.installer-card form,
.installer-card {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.installer-card label,
.login-card label {
    display: grid;
    gap: 7px;
    color: var(--muted);
}

.installer-card input,
.installer-card select,
.login-card input {
    padding: 11px;
}

.choice-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.choice-card {
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.06);
}

.swatches {
    display: flex;
    gap: 10px;
}

.swatches label span,
.swatch-row button {
    display: block;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--swatch);
    border: 2px solid rgba(255, 255, 255, 0.35);
}

.swatches input {
    position: absolute;
    opacity: 0;
}

.swatches input:checked + span,
.swatch-row button.active {
    outline: 3px solid var(--text);
}

.progress-track,
.meter {
    height: 18px;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.14);
}

.progress-track span,
.meter span {
    display: block;
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #fff);
}

.login-card {
    width: 360px;
    text-align: center;
}

.login-avatar {
    width: 92px;
    height: 92px;
    margin: 0 auto 16px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: color-mix(in srgb, var(--accent), transparent 55%);
    border: 1px solid var(--line);
    font-size: 34px;
    font-weight: 800;
}

.login-card input,
.login-card button {
    width: 100%;
    margin-top: 10px;
}

.hw-warning {
    color: #ffcf70 !important;
    font-size: 13px;
}

.scanlines {
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(0deg, rgba(255,255,255,0.08) 0 1px, transparent 1px 5px);
    opacity: 0.16;
}

.w12-sleep {
    flex-direction: column;
    background: #020308;
}

.w12-sleep button {
    padding: 16px 22px;
}

.w12-desktop {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.desktop-icons {
    position: absolute;
    top: 18px;
    left: 18px;
    display: grid;
    gap: 12px;
    z-index: 1;
}

.desktop-icon {
    width: 92px;
    min-height: 78px;
    display: grid;
    place-items: center;
    padding: 8px;
    background: transparent !important;
    border-color: transparent !important;
    color: #fff;
    text-shadow: 0 1px 5px #000;
}

.desktop-icon span {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border-radius: 7px;
    background: color-mix(in srgb, var(--accent), #0b1020 45%);
    font-weight: 800;
}

.desktop-icon em {
    font-size: 12px;
    font-style: normal;
}

.window-layer {
    position: absolute;
    inset: 0 0 54px;
    z-index: 2;
    pointer-events: none;
}

.w12-window {
    position: absolute;
    min-width: 340px;
    min-height: 250px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--panel-strong);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 22px 70px rgba(0, 0, 0, 0.42);
    backdrop-filter: blur(20px);
    pointer-events: auto;
}

.w12-window.max {
    border-radius: 0;
}

.window-titlebar {
    height: 38px;
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 0 8px 0 12px;
    background: rgba(255, 255, 255, 0.08);
    border-bottom: 1px solid var(--line);
    user-select: none;
}

.window-icon {
    width: 25px;
    height: 25px;
    display: grid;
    place-items: center;
    border-radius: 5px;
    background: color-mix(in srgb, var(--accent), transparent 42%);
    font-size: 11px;
    font-weight: 800;
}

.window-controls {
    margin-left: auto;
    display: flex;
    gap: 5px;
}

.window-controls button {
    width: 32px;
    height: 27px;
    padding: 0;
    border-radius: 5px;
}

.window-body {
    flex: 1;
    min-height: 0;
    overflow: auto;
}

.resize-handle {
    position: absolute;
    right: 0;
    bottom: 0;
    width: 30px;
    height: 30px;
    cursor: nwse-resize;
    pointer-events: auto;
}

.resize-handle::after {
    content: "";
    position: absolute;
    right: 7px;
    bottom: 7px;
    width: 13px;
    height: 13px;
    border-right: 2px solid var(--line);
    border-bottom: 2px solid var(--line);
}

.w12-taskbar {
    position: absolute;
    left: 10px;
    right: 10px;
    bottom: 10px;
    height: 44px;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 8px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 8px;
    background: rgba(6, 10, 18, 0.82);
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.38);
    backdrop-filter: blur(24px);
}

.start-button {
    width: 38px;
    height: 32px;
    padding: 0;
    font-weight: 900;
    background: color-mix(in srgb, var(--accent), transparent 55%) !important;
}

.task-search {
    width: 210px;
    padding: 8px 12px;
    text-align: left;
    color: rgba(255, 255, 255, 0.72) !important;
}

.task-pins,
.task-running {
    display: flex;
    gap: 6px;
    min-width: 0;
}

.task-pins button {
    width: 34px;
    height: 32px;
    padding: 0;
    font-size: 11px;
    font-weight: 800;
}

.task-running {
    flex: 1;
    overflow: hidden;
}

.task-running button {
    max-width: 150px;
    height: 32px;
    padding: 0 10px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 12px;
}

.task-running button.live {
    border-color: color-mix(in srgb, var(--accent), transparent 22%);
}

.tray {
    display: flex;
    align-items: center;
    gap: 9px;
    height: 32px;
    padding: 0 10px;
    font-size: 12px;
}

.start-menu,
.quick-panel,
.desktop-menu {
    position: absolute;
    z-index: 20;
    background: var(--panel-strong);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(24px);
}

.start-menu {
    left: 18px;
    bottom: 66px;
    width: 520px;
    max-height: calc(100% - 96px);
    padding: 16px;
    overflow: auto;
}

.start-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.start-menu input {
    width: 100%;
    box-sizing: border-box;
    margin: 14px 0;
    padding: 11px;
}

.start-menu h2 {
    margin: 14px 0 8px;
    font-size: 14px;
    color: var(--muted);
}

.start-app-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.start-app-grid button {
    min-height: 72px;
    display: grid;
    place-items: center;
    gap: 5px;
    padding: 8px;
    font-size: 12px;
}

.start-app-grid span {
    width: 32px;
    height: 32px;
    display: grid;
    place-items: center;
    border-radius: 7px;
    background: color-mix(in srgb, var(--accent), transparent 50%);
    font-weight: 800;
}

.start-files,
.link-list {
    display: grid;
    gap: 7px;
}

.start-files button,
.link-list button {
    padding: 8px 10px;
    text-align: left;
}

.power-strip {
    display: flex;
    gap: 8px;
    margin-top: 14px;
}

.power-strip button {
    flex: 1;
    padding: 9px;
}

.quick-panel {
    right: 18px;
    bottom: 66px;
    width: 300px;
    padding: 16px;
}

.quick-panel h2 {
    margin: 0 0 12px;
}

.quick-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
}

.quick-grid button.on {
    background: color-mix(in srgb, var(--accent), transparent 62%);
    border-color: var(--accent);
}

.quick-panel input {
    width: 100%;
    margin-top: 8px;
}

.desktop-menu {
    width: 180px;
    padding: 8px;
}

.desktop-menu button {
    width: 100%;
    padding: 9px;
    text-align: left;
    border-color: transparent;
    background: transparent;
}

.notification-stack {
    position: absolute;
    top: 18px;
    right: 18px;
    z-index: 15;
    display: grid;
    gap: 10px;
    width: min(320px, calc(100% - 36px));
    pointer-events: none;
}

.toast {
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
    backdrop-filter: blur(18px);
}

.toast strong,
.toast span {
    display: block;
}

.toast span {
    margin-top: 4px;
    color: var(--muted);
    font-size: 13px;
}

.files-app {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.files-toolbar,
.browser-bar,
.note-toolbar,
.game-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.05);
}

.files-toolbar button,
.browser-bar button,
.note-toolbar button,
.game-toolbar button {
    padding: 7px 10px;
}

.files-toolbar span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--muted);
}

.file-list {
    padding: 12px;
    display: grid;
    gap: 7px;
}

.file-row {
    min-height: 42px;
    display: grid;
    grid-template-columns: 46px 1fr 80px 150px;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    text-align: left;
    border: 1px solid var(--line);
    border-radius: 7px;
    background: rgba(255, 255, 255, 0.1);
}

.file-row span {
    color: var(--accent);
    font-weight: 800;
}

.file-open {
    padding: 5px 7px;
    text-align: left;
    border-color: transparent !important;
    background: transparent !important;
    font-weight: 700;
}

.file-row em {
    color: var(--muted);
    font-style: normal;
}

.file-row i {
    display: flex;
    gap: 5px;
    font-style: normal;
}

.file-row i button {
    padding: 5px 7px;
    font-size: 12px;
}

.empty-note,
.app-empty {
    padding: 24px;
    color: var(--muted);
}

.browser-app,
.gamehub-app,
.veilchat-app,
.notepad-app,
.terminal-app {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.browser-bar input {
    flex: 1;
    min-width: 0;
    padding: 8px 10px;
}

.browser-page {
    flex: 1;
    min-height: 0;
    overflow: auto;
    background: color-mix(in srgb, var(--panel-strong), #fff 6%);
}

.browser-page iframe {
    width: 100%;
    height: calc(100% - 36px);
    border: 0;
    background: #fff;
}

.browser-hint {
    margin: 0;
    padding: 8px 12px;
    color: var(--muted);
    font-size: 12px;
}

.gamehub-app {
    overflow: hidden;
    background:
        radial-gradient(circle at 20% 10%, rgba(76, 201, 255, 0.2), transparent 34%),
        radial-gradient(circle at 78% 18%, rgba(255, 79, 216, 0.18), transparent 36%),
        #030309;
}

.gamehub-frame {
    flex: 1;
    width: 100%;
    min-height: 0;
    border: 0;
    display: block;
    background: #030309;
}

.veilchat-app {
    overflow: hidden;
    background:
        radial-gradient(circle at 18% 12%, rgba(124, 92, 255, 0.22), transparent 34%),
        radial-gradient(circle at 86% 18%, rgba(76, 201, 255, 0.16), transparent 34%),
        #070a12;
}

.veilchat-frame {
    flex: 1;
    width: 100%;
    min-height: 0;
    border: 0;
    display: block;
    background: #070a12;
}

.nova-home {
    min-height: 100%;
    padding: 28px;
    background:
        radial-gradient(circle at 80% 18%, color-mix(in srgb, var(--accent), transparent 70%), transparent 26%),
        linear-gradient(135deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02));
}

.nova-home h1 {
    margin: 0;
    font-size: 40px;
}

.nova-home p,
.nova-home h2 {
    color: var(--muted);
}

.nova-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin: 18px 0;
}

.nova-cards button {
    padding: 24px 12px;
    font-weight: 700;
}

.settings-app {
    height: 100%;
    display: grid;
    grid-template-columns: 190px 1fr;
}

.settings-app aside {
    display: grid;
    align-content: start;
    gap: 10px;
    padding: 18px;
    border-right: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
}

.settings-app aside strong {
    font-size: 22px;
}

.settings-app aside span {
    color: var(--muted);
}

.settings-app main {
    padding: 18px;
    overflow: auto;
    display: grid;
    gap: 14px;
}

.settings-app h2 {
    margin: 0 0 10px;
}

.seg-row button {
    flex: 1;
    padding: 10px;
}

.seg-row .active,
.wallpaper-tile.active {
    border-color: var(--accent);
    box-shadow: inset 0 0 0 1px var(--accent);
}

.swatch-row {
    margin: 12px 0;
}

.wallpaper-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

.wallpaper-tile {
    min-height: 76px;
    padding: 8px;
    text-shadow: 0 1px 5px #000;
}

.terminal-app {
    background: #02040a;
    color: #d8f8dd;
    font-family: Consolas, Monaco, monospace;
}

.terminal-app pre {
    flex: 1;
    min-height: 0;
    margin: 0;
    padding: 14px;
    overflow: auto;
    white-space: pre-wrap;
}

.terminal-app form {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.terminal-app input {
    flex: 1;
    min-width: 0;
    padding: 7px;
    color: #d8f8dd;
    background: transparent;
    border-color: rgba(255, 255, 255, 0.14);
}

.notepad-app textarea {
    flex: 1;
    min-height: 0;
    resize: none;
    border: 0;
    border-radius: 0;
    padding: 16px;
    line-height: 1.5;
    background: color-mix(in srgb, var(--panel-strong), #fff 7%);
}

.note-toolbar span {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--muted);
}

.calculator-app {
    padding: 16px;
    display: grid;
    gap: 12px;
}

.calculator-app input {
    width: 100%;
    box-sizing: border-box;
    padding: 13px;
    font-size: 26px;
    text-align: right;
}

.calc-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.calc-grid button {
    min-height: 52px;
    font-size: 20px;
}

.viewer-app,
.placeholder-app {
    min-height: 100%;
    display: grid;
    place-items: center;
    align-content: center;
    gap: 10px;
    padding: 20px;
    text-align: center;
}

.viewer-art {
    width: min(520px, 82%);
    aspect-ratio: 16 / 9;
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.32);
}

.placeholder-app span {
    width: 78px;
    height: 78px;
    display: grid;
    place-items: center;
    border-radius: 18px;
    background: color-mix(in srgb, var(--accent), transparent 55%);
    font-weight: 900;
    font-size: 24px;
}

.taskmgr-app {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 14px;
    padding: 14px;
}

.process-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 9px 0;
    border-bottom: 1px solid var(--line);
}

.process-row button {
    padding: 7px 10px;
}

.store-app,
.games-app {
    padding: 18px;
}

.store-grid,
.games-app {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.store-app article span {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 9px;
    background: color-mix(in srgb, var(--accent), transparent 55%);
    font-weight: 900;
}

.store-app article button,
.games-app article button {
    padding: 10px 12px;
}

.mines-app,
.snake-app {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.mines-grid,
.snake-grid {
    flex: 1;
    min-height: 0;
    display: grid;
    gap: 4px;
    padding: 14px;
}

.mines-grid button {
    min-width: 0;
    min-height: 0;
    padding: 0;
    border-radius: 5px;
    font-weight: 800;
    background: rgba(255, 255, 255, 0.12);
}

.mines-grid button.open {
    background: rgba(255, 255, 255, 0.04);
}

.mines-grid button.flag {
    color: #ffcf70;
}

.snake-grid {
    background: #050914;
}

.snake-grid span {
    min-width: 0;
    min-height: 0;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.035);
}

.snake-grid .body {
    background: color-mix(in srgb, var(--accent), white 10%);
    box-shadow: 0 0 12px var(--accent);
}

.snake-grid .head {
    background: #fff;
    box-shadow: 0 0 18px var(--accent);
}

.snake-grid .food {
    background: #ff4fd8;
    box-shadow: 0 0 16px #ff4fd8;
}

@media (max-width: 840px) {
    .pc-shell {
        width: 100vw;
        height: 100vh;
        min-height: 0;
    }

    .firmware-grid,
    .settings-app,
    .taskmgr-app,
    .store-grid,
    .games-app,
    .wallpaper-row {
        grid-template-columns: 1fr;
    }

    .task-search,
    .task-running {
        display: none;
    }

    .start-menu {
        width: calc(100% - 36px);
    }

    .start-app-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Phase 3 visual upgrade: premium original desktop skin. */
#pc-os-overlay {
    background:
        radial-gradient(circle at 18% 12%, rgba(76, 201, 255, 0.18), transparent 34%),
        radial-gradient(circle at 82% 86%, rgba(255, 79, 216, 0.14), transparent 32%),
        #020308;
}

.pc-shell {
    width: 100vw;
    height: 100vh;
    border-radius: 0;
    background: linear-gradient(180deg, rgba(13, 18, 29, 0.98), rgba(3, 5, 10, 0.99));
    border: 0;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.pc-frame-top {
    height: 38px;
    background:
        linear-gradient(90deg, rgba(76, 201, 255, 0.12), transparent 24%, rgba(255, 79, 216, 0.08)),
        linear-gradient(180deg, rgba(28, 34, 47, 0.98), rgba(8, 11, 17, 0.98));
}

.pc-close {
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.14);
}

.pc-os-root {
    --panel: rgba(9, 15, 28, 0.68);
    --panel-strong: rgba(10, 15, 27, 0.88);
    --panel-solid: #0b1020;
    --text: #f8fbff;
    --muted: rgba(248, 251, 255, 0.68);
    --line: rgba(255, 255, 255, 0.17);
    --field: rgba(255, 255, 255, 0.105);
    --shadow: 0 24px 90px rgba(0, 0, 0, 0.48);
    --radius: 14px;
    color: var(--text);
    font-family: Inter, "Segoe UI Variable", "Segoe UI", system-ui, sans-serif;
}

.pc-os-root.w12-light {
    --panel: rgba(247, 250, 255, 0.72);
    --panel-strong: rgba(255, 255, 255, 0.9);
    --panel-solid: #f7faff;
    --text: #0b1020;
    --muted: rgba(11, 16, 32, 0.65);
    --line: rgba(12, 18, 34, 0.15);
    --field: rgba(12, 18, 34, 0.07);
}

.pc-os-root button {
    min-height: 34px;
    border-radius: 10px;
    border: 1px solid var(--line);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.13), rgba(255, 255, 255, 0.055));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.13);
    transition: transform 120ms ease, border-color 120ms ease, background 120ms ease, box-shadow 120ms ease;
}

.pc-os-root button:hover {
    transform: translateY(-1px);
    border-color: color-mix(in srgb, var(--accent), white 28%);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.18),
        0 10px 26px rgba(0, 0, 0, 0.2);
}

.pc-os-root .primary-action {
    color: #07111d;
    font-weight: 800;
    border-color: transparent;
    background:
        linear-gradient(135deg, #fff 0%, color-mix(in srgb, var(--accent), white 35%) 38%, var(--accent) 100%);
    box-shadow: 0 14px 34px color-mix(in srgb, var(--accent), transparent 62%);
}

.pc-os-root input,
.pc-os-root select,
.pc-os-root textarea {
    border-radius: 10px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.055));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.09);
}

.wallpaper-aurora {
    background:
        radial-gradient(circle at 78% 18%, color-mix(in srgb, var(--accent), transparent 48%), transparent 24%),
        radial-gradient(circle at 26% 88%, rgba(255, 79, 216, 0.28), transparent 30%),
        linear-gradient(130deg, #071022 0%, #12406a 38%, #392064 72%, #12051f 100%);
}

.wallpaper-circuit {
    background:
        linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        radial-gradient(circle at 78% 18%, color-mix(in srgb, var(--accent), transparent 50%), transparent 24%),
        linear-gradient(135deg, #06121f, #102b52 52%, #250939);
    background-size: 42px 42px, 42px 42px, cover, cover;
}

.wallpaper-grid {
    background:
        radial-gradient(circle at 18% 82%, rgba(76, 201, 255, 0.26), transparent 32%),
        radial-gradient(circle at 82% 16%, rgba(154, 124, 255, 0.24), transparent 30%),
        linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px),
        linear-gradient(135deg, #071220, #11182c 58%, #050812);
    background-size: cover, cover, 48px 48px, 48px 48px, cover;
}

.wallpaper-sunrise {
    background:
        radial-gradient(circle at 30% 24%, rgba(255, 244, 196, 0.72), transparent 18%),
        radial-gradient(circle at 74% 78%, rgba(76, 201, 255, 0.18), transparent 30%),
        linear-gradient(135deg, #f6c277, #cf5f82 42%, #1c346b 78%);
}

.w12-stage {
    overflow: hidden;
}

.w12-stage::before {
    content: "";
    position: absolute;
    inset: -20%;
    pointer-events: none;
    background:
        linear-gradient(115deg, transparent 0 38%, rgba(255, 255, 255, 0.08) 39%, transparent 40% 100%),
        repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.045) 0 1px, transparent 1px 86px);
    mask-image: radial-gradient(circle at 50% 50%, black 0 58%, transparent 80%);
}

.lux-light {
    position: absolute;
    width: 42vw;
    aspect-ratio: 1;
    border-radius: 50%;
    pointer-events: none;
    filter: blur(36px);
    opacity: 0.55;
}

.lux-a {
    top: -18%;
    right: -10%;
    background: color-mix(in srgb, var(--accent), transparent 35%);
}

.lux-b {
    bottom: -24%;
    left: -16%;
    background: rgba(255, 79, 216, 0.5);
}

.premium-card {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.105), rgba(255, 255, 255, 0.045)),
        var(--panel);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius);
    box-shadow:
        var(--shadow),
        inset 0 1px 0 rgba(255, 255, 255, 0.18),
        inset 0 -1px 0 rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(28px) saturate(140%);
}

.power-card,
.installer-card,
.setup-panel,
.login-card,
.nosignal-card {
    position: relative;
    width: min(980px, calc(100% - 72px));
    padding: 30px;
}

.power-card h1,
.installer-card h1,
.setup-panel h1,
.login-card h1 {
    font-size: clamp(38px, 5vw, 72px);
    letter-spacing: -0.035em;
    line-height: 0.94;
}

.brand-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 22px;
}

.brand-chip {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    color: #05101c;
    font-weight: 900;
    background: linear-gradient(135deg, #fff, var(--accent));
    box-shadow: 0 12px 34px color-mix(in srgb, var(--accent), transparent 55%);
}

.power-grid,
.setup-split {
    display: grid !important;
    grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
    gap: 26px;
    align-items: stretch;
}

.setup-main {
    display: grid;
    gap: 14px;
    align-content: start;
}

.setup-copy {
    max-width: 560px;
}

.setup-side,
.device-preview {
    position: relative;
    overflow: hidden;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background:
        radial-gradient(circle at 80% 12%, color-mix(in srgb, var(--accent), transparent 62%), transparent 28%),
        rgba(255, 255, 255, 0.065);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.device-screen {
    position: relative;
    height: 250px;
    overflow: hidden;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.22);
    background: #050914;
    box-shadow: 0 22px 60px rgba(0, 0, 0, 0.34);
}

.preview-wall {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 74% 24%, var(--accent), transparent 28%),
        linear-gradient(135deg, #112043, #4a1260);
}

.preview-dock,
.mini-taskbar {
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: 16px;
    height: 34px;
    border-radius: 12px;
    background: rgba(6, 10, 18, 0.72);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.device-screen > span {
    position: absolute;
    width: 82px;
    height: 58px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.16);
}

.device-screen > span:nth-of-type(1) { left: 28px; top: 34px; }
.device-screen > span:nth-of-type(2) { left: 128px; top: 72px; width: 124px; }
.device-screen > span:nth-of-type(3) { right: 30px; top: 40px; height: 122px; }

.device-specs,
.side-metric {
    display: grid;
    gap: 8px;
    margin-top: 14px;
}

.device-specs b,
.side-metric {
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.07);
}

.side-metric {
    grid-template-columns: 1fr auto;
    align-items: center;
}

.side-metric span {
    color: var(--muted);
}

.power-orb {
    position: relative;
    width: 118px;
    height: 118px;
    border-radius: 28px;
    background:
        radial-gradient(circle at 34% 28%, #fff, var(--accent) 28%, #243b76 64%, #050914);
    box-shadow:
        0 0 50px color-mix(in srgb, var(--accent), transparent 36%),
        inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.power-orb span {
    position: absolute;
    inset: 22px;
    border: 2px solid rgba(255, 255, 255, 0.72);
    border-radius: 50%;
}

.boot-core {
    position: relative;
    display: grid;
    place-items: center;
    gap: 12px;
    text-align: center;
}

.w12-boot {
    background:
        radial-gradient(circle at 50% 36%, rgba(76, 201, 255, 0.34), transparent 24%),
        radial-gradient(circle at 52% 40%, rgba(255, 255, 255, 0.16), transparent 10%),
        #02040a;
}

.boot-mark {
    position: relative;
    width: 124px;
    height: 124px;
    border-radius: 32px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.24), rgba(255, 255, 255, 0.04)),
        color-mix(in srgb, var(--accent), transparent 78%);
}

.boot-mark span {
    width: 86px;
    height: 86px;
    display: grid;
    place-items: center;
    border-radius: 24px;
    background: linear-gradient(135deg, #fff, var(--accent));
    color: #07111d;
}

.setup-heading {
    max-width: 720px;
    margin-bottom: 20px;
}

.setup-heading h1 {
    margin-bottom: 12px;
}

.boot-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 310px;
    gap: 18px;
}

.boot-options {
    display: grid;
    gap: 12px;
}

.boot-menu-panel button {
    min-height: 84px;
    display: grid;
    grid-template-columns: 50px 1fr;
    grid-template-areas: "icon title" "icon desc";
    align-content: center;
    gap: 2px 14px;
    padding: 14px;
    text-align: left;
}

.boot-menu-panel button b {
    grid-area: title;
    font-size: 17px;
}

.boot-menu-panel button span {
    grid-area: desc;
}

.option-icon {
    grid-area: icon;
    width: 42px;
    height: 42px;
    border-radius: 13px;
    background:
        radial-gradient(circle at 30% 25%, #fff, transparent 24%),
        linear-gradient(135deg, var(--accent), #3547ff);
    box-shadow: 0 10px 25px color-mix(in srgb, var(--accent), transparent 65%);
}

.usb-icon { background: linear-gradient(135deg, #ffb84d, #ff4fd8); }
.chip-icon { background: linear-gradient(135deg, #7cf27c, #4cc9ff); }
.wipe-icon { background: linear-gradient(135deg, #ff6a6a, #9a7cff); }

.boot-status-card {
    padding: 16px;
    border-radius: 16px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.06);
}

.boot-status-card h2 {
    margin: 0 0 12px;
}

.boot-status-card div {
    display: flex;
    justify-content: space-between;
    padding: 9px 0;
    border-bottom: 1px solid var(--line);
}

.firmware-panel {
    width: min(1080px, calc(100% - 56px));
}

.firmware-grid section,
.settings-app section,
.taskmgr-app section,
.store-app article,
.games-app article {
    border-radius: 16px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.105), rgba(255, 255, 255, 0.045));
}

.firmware-chip-map {
    height: 118px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin: 12px 0;
}

.firmware-chip-map span {
    border-radius: 12px;
    border: 1px solid var(--line);
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.045)),
        color-mix(in srgb, var(--accent), transparent 82%);
}

.choice-card {
    min-height: 82px;
    display: flex;
    align-items: center;
    border-radius: 14px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.13), rgba(255, 255, 255, 0.04));
}

.choice-card input {
    accent-color: var(--accent);
}

.theme-choice span {
    display: grid;
    gap: 5px;
}

.theme-choice small {
    color: var(--muted);
}

.swatches label span,
.swatch-row button {
    width: 42px;
    height: 42px;
    box-shadow: 0 12px 26px color-mix(in srgb, var(--swatch), transparent 68%);
}

.setup-side h2 {
    margin: 18px 0 6px;
}

.profile-orbit {
    width: 132px;
    height: 132px;
    display: grid;
    place-items: center;
    border-radius: 34px;
    font-size: 42px;
    font-weight: 900;
    color: #07111d;
    background: linear-gradient(135deg, #fff, var(--accent));
}

.drive-stack {
    display: grid;
    gap: 12px;
}

.drive-stack span {
    height: 52px;
    border-radius: 14px;
    background:
        linear-gradient(90deg, var(--accent), transparent 18%),
        rgba(255, 255, 255, 0.09);
    border: 1px solid var(--line);
}

.mini-window {
    position: absolute;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.25);
}

.mini-window.one {
    width: 58%;
    height: 34%;
    left: 24px;
    top: 34px;
}

.mini-window.two {
    width: 44%;
    height: 46%;
    right: 28px;
    top: 96px;
}

.progress-card {
    width: min(820px, calc(100% - 60px));
    display: grid !important;
    grid-template-columns: 190px 1fr;
    gap: 28px;
    align-items: center;
}

.install-ring {
    width: 164px;
    height: 164px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background:
        conic-gradient(var(--accent) var(--progress), rgba(255, 255, 255, 0.12) 0),
        rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 50px color-mix(in srgb, var(--accent), transparent 58%);
}

.install-ring span {
    width: 118px;
    height: 118px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: rgba(6, 10, 18, 0.86);
    font-size: 30px;
    font-weight: 900;
}

.install-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin: 14px 0;
}

.install-steps span {
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 10px;
    color: var(--muted);
    font-size: 12px;
}

.install-steps span.done {
    color: var(--text);
    border-color: color-mix(in srgb, var(--accent), transparent 20%);
    background: color-mix(in srgb, var(--accent), transparent 82%);
}

.login-card {
    width: 400px;
    padding: 34px;
}

.login-avatar {
    width: 122px;
    height: 122px;
    border-radius: 34px;
    background:
        linear-gradient(135deg, #fff, var(--accent));
    box-shadow: 0 18px 55px color-mix(in srgb, var(--accent), transparent 55%);
}

.login-avatar span {
    color: #07111d;
}

.desktop-noise {
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0.22;
    background-image:
        linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
    background-size: 52px 52px;
}

.desktop-light {
    position: absolute;
    width: 360px;
    height: 360px;
    border-radius: 50%;
    filter: blur(55px);
    pointer-events: none;
    opacity: 0.55;
}

.desktop-light-a {
    right: 6%;
    top: 8%;
    background: color-mix(in srgb, var(--accent), transparent 36%);
}

.desktop-light-b {
    left: 36%;
    bottom: -120px;
    background: rgba(255, 79, 216, 0.38);
}

.desktop-icons {
    top: 22px;
    left: 22px;
    grid-auto-flow: column;
    grid-template-rows: repeat(7, 78px);
    gap: 10px 16px;
}

.desktop-icon {
    width: 94px;
    min-height: 72px;
    border-radius: 12px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.9);
}

.desktop-icon:hover {
    background: rgba(255, 255, 255, 0.12) !important;
}

.desktop-selection {
    position: absolute;
    z-index: 4;
    pointer-events: none;
    border: 1px solid color-mix(in srgb, var(--accent), white 22%);
    background:
        linear-gradient(135deg, color-mix(in srgb, var(--accent), transparent 76%), rgba(255, 255, 255, 0.08));
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.16) inset,
        0 0 28px color-mix(in srgb, var(--accent), transparent 68%);
}

.desktop-icon em {
    max-width: 92px;
    line-height: 1.15;
}

.app-glyph {
    position: relative;
    display: inline-grid;
    place-items: center;
    width: 38px;
    height: 38px;
    flex: 0 0 auto;
    border-radius: 12px;
    overflow: hidden;
    color: #fff;
    font-weight: 900;
    font-size: 11px;
    letter-spacing: -0.02em;
    background:
        radial-gradient(circle at 28% 22%, rgba(255, 255, 255, 0.92), transparent 20%),
        linear-gradient(135deg, #4cc9ff, #3547ff);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.34),
        0 10px 25px rgba(0, 0, 0, 0.26);
}

.app-glyph::before {
    content: none;
}

.app-glyph svg {
    position: relative;
    z-index: 2;
    width: 72%;
    height: 72%;
    stroke: currentColor;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.32));
}

.app-glyph i {
    position: absolute;
    inset: auto -8px -10px 12px;
    height: 24px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.22);
}

.app-glyph.desktop {
    width: 42px;
    height: 42px;
    font-size: 12px;
}

.app-glyph.task,
.app-glyph.run,
.app-glyph.file {
    width: 28px;
    height: 28px;
    border-radius: 9px;
    font-size: 9px;
}

.app-glyph.task svg,
.app-glyph.run svg,
.app-glyph.file svg,
.app-glyph.window svg {
    width: 70%;
    height: 70%;
}

.app-glyph.window {
    width: 28px;
    height: 28px;
    border-radius: 9px;
}

.app-glyph.start {
    width: 44px;
    height: 44px;
    border-radius: 14px;
}

.app-glyph.hero {
    width: 74px;
    height: 74px;
    border-radius: 22px;
    font-size: 19px;
}

.app-glyph.hero svg {
    width: 68%;
    height: 68%;
}

.app-glyph.store {
    width: 48px;
    height: 48px;
    border-radius: 15px;
    font-size: 13px;
}

.glyph-files,
.glyph-folder { background: radial-gradient(circle at 28% 20%, #fff, transparent 18%), linear-gradient(135deg, #63e6be, #2f80ed); }
.glyph-browser { background: radial-gradient(circle at 30% 24%, #fff, transparent 18%), linear-gradient(135deg, #4cc9ff, #9a7cff); }
.glyph-settings { background: radial-gradient(circle at 30% 24%, #fff, transparent 18%), linear-gradient(135deg, #c9d6ff, #6e88ff); }
.glyph-terminal { background: radial-gradient(circle at 30% 24%, #fff, transparent 18%), linear-gradient(135deg, #1bff9b, #083a28); }
.glyph-notepad,
.glyph-document { background: radial-gradient(circle at 30% 24%, #fff, transparent 18%), linear-gradient(135deg, #fff2a6, #ff9f43); }
.glyph-calculator { background: radial-gradient(circle at 30% 24%, #fff, transparent 18%), linear-gradient(135deg, #9a7cff, #382b78); }
.glyph-viewer { background: radial-gradient(circle at 30% 24%, #fff, transparent 18%), linear-gradient(135deg, #ffb84d, #ff4fd8); }
.glyph-taskmgr { background: radial-gradient(circle at 30% 24%, #fff, transparent 18%), linear-gradient(135deg, #7cf27c, #208a55); }
.glyph-store { background: radial-gradient(circle at 30% 24%, #fff, transparent 18%), linear-gradient(135deg, #4cc9ff, #ff4fd8); }
.glyph-veilchat { background: radial-gradient(circle at 30% 24%, #fff, transparent 18%), linear-gradient(135deg, #705cff, #25d0ff); }
.glyph-gamehub { background: radial-gradient(circle at 26% 22%, #fff, transparent 17%), radial-gradient(circle at 72% 70%, rgba(0,0,0,0.26), transparent 24%), linear-gradient(135deg, #00e5ff, #ff3dde 52%, #fff06b); }
.glyph-games,
.glyph-mines,
.glyph-snake { background: radial-gradient(circle at 30% 24%, #fff, transparent 18%), linear-gradient(135deg, #ff4fd8, #9a7cff); }

.desktop-widget {
    position: absolute;
    top: 22px;
    right: 24px;
    z-index: 1;
    width: 310px;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(7, 12, 22, 0.44);
    backdrop-filter: blur(22px) saturate(140%);
    box-shadow: var(--shadow);
}

.desktop-widget strong {
    display: block;
    font-size: 42px;
    letter-spacing: -0.04em;
}

.desktop-widget span {
    color: var(--muted);
}

.widget-metrics {
    display: flex;
    gap: 8px;
    margin: 14px 0;
    flex-wrap: wrap;
}

.status-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 9px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--muted);
    font-size: 12px;
}

.status-chip b {
    color: var(--accent);
    font-size: 11px;
}

.w12-taskbar {
    left: 14px;
    right: 14px;
    bottom: 12px;
    height: 56px;
    padding: 0 10px;
    border-radius: 18px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.055)),
        rgba(5, 9, 17, 0.72);
    box-shadow:
        0 18px 58px rgba(0, 0, 0, 0.46),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.start-button {
    width: 46px;
    height: 42px;
    border-radius: 14px;
}

.start-button span {
    font-weight: 950;
}

.task-search {
    width: 270px;
    height: 42px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-radius: 14px;
}

.task-search b {
    width: 14px;
    height: 14px;
    border: 2px solid var(--accent);
    border-radius: 50%;
    box-shadow: 8px 8px 0 -6px var(--accent);
}

.task-pins button {
    width: 42px;
    height: 42px;
    border-radius: 13px;
}

.task-running button {
    height: 42px;
    border-radius: 13px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.tray {
    height: 42px;
    border-radius: 13px;
}

.tray .status-chip {
    padding: 5px 7px;
}

.start-menu {
    left: 24px;
    bottom: 78px;
    width: 660px;
    padding: 18px;
}

.start-top strong {
    display: block;
    font-size: 26px;
    letter-spacing: -0.03em;
}

.start-top span {
    color: var(--muted);
    font-size: 13px;
}

.start-app-grid {
    grid-template-columns: repeat(4, 1fr);
}

.start-app-grid button {
    min-height: 92px;
    border-radius: 16px;
}

.start-app-grid button > span:not(.app-glyph) {
    font-size: 12px;
}

.start-lower {
    display: grid;
    grid-template-columns: 1fr 220px;
    gap: 14px;
    margin-top: 12px;
}

.start-files button {
    display: flex;
    align-items: center;
    gap: 9px;
}

.start-system {
    display: grid;
    gap: 8px;
    align-content: start;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.06);
}

.quick-panel {
    right: 24px;
    bottom: 78px;
    width: 360px;
}

.quick-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 12px;
}

.quick-grid button {
    min-height: 78px;
    display: grid;
    align-content: center;
    justify-items: start;
    gap: 4px;
}

.quick-grid button span {
    color: var(--muted);
    font-size: 12px;
}

.quick-grid button.on {
    background:
        linear-gradient(135deg, color-mix(in srgb, var(--accent), transparent 48%), rgba(255, 255, 255, 0.07));
}

.desktop-menu {
    border-radius: 14px;
}

.w12-window {
    border-radius: 16px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.03)),
        var(--panel-strong);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow:
        0 28px 88px rgba(0, 0, 0, 0.46),
        inset 0 1px 0 rgba(255, 255, 255, 0.16);
}

.window-titlebar {
    height: 46px;
    padding: 0 10px 0 14px;
    background:
        linear-gradient(90deg, color-mix(in srgb, var(--accent), transparent 86%), transparent 42%),
        rgba(255, 255, 255, 0.07);
}

.window-titlebar strong {
    letter-spacing: -0.01em;
}

.window-controls button {
    width: 34px;
    height: 30px;
    display: grid;
    place-items: center;
}

.window-controls button span {
    display: block;
    width: 12px;
    height: 12px;
    position: relative;
}

.win-min span::before {
    content: "";
    position: absolute;
    left: 1px;
    right: 1px;
    bottom: 2px;
    height: 2px;
    background: currentColor;
}

.win-max span {
    border: 2px solid currentColor;
    border-radius: 3px;
}

.win-close span::before,
.win-close span::after {
    content: "";
    position: absolute;
    left: 1px;
    top: 5px;
    width: 12px;
    height: 2px;
    background: currentColor;
}

.win-close span::before { transform: rotate(45deg); }
.win-close span::after { transform: rotate(-45deg); }

.win-close:hover {
    color: #fff;
    background: #d93750 !important;
}

.notification-stack {
    top: 24px;
    right: 24px;
}

.toast {
    border-radius: 16px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.045)),
        rgba(8, 13, 24, 0.74);
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.34);
}

.files-toolbar,
.browser-bar,
.note-toolbar,
.game-toolbar {
    padding: 12px;
    background:
        linear-gradient(90deg, color-mix(in srgb, var(--accent), transparent 88%), transparent),
        rgba(255, 255, 255, 0.055);
}

.file-list {
    padding: 16px;
    gap: 9px;
}

.file-row {
    grid-template-columns: 34px 1fr 80px 156px;
    min-height: 54px;
    border-radius: 14px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.105), rgba(255, 255, 255, 0.035));
}

.file-open {
    color: var(--text) !important;
}

.browser-bar input {
    height: 36px;
}

.nova-home {
    background:
        radial-gradient(circle at 84% 18%, color-mix(in srgb, var(--accent), transparent 56%), transparent 26%),
        radial-gradient(circle at 18% 82%, rgba(255, 79, 216, 0.18), transparent 24%),
        linear-gradient(135deg, rgba(255,255,255,0.075), rgba(255,255,255,0.02));
}

.nova-hero,
.store-hero {
    display: flex;
    align-items: center;
    gap: 18px;
}

.nova-cards button {
    min-height: 112px;
    display: grid;
    align-content: end;
    justify-items: start;
    border-radius: 18px;
    text-align: left;
    background:
        radial-gradient(circle at 80% 20%, color-mix(in srgb, var(--accent), transparent 60%), transparent 34%),
        rgba(255, 255, 255, 0.08);
}

.nova-cards button b {
    font-size: 18px;
}

.nova-cards button span {
    color: var(--muted);
}

.settings-app {
    background:
        radial-gradient(circle at 90% 8%, color-mix(in srgb, var(--accent), transparent 75%), transparent 28%),
        transparent;
}

.settings-app aside {
    padding: 22px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.025));
}

.settings-app aside strong {
    font-size: 28px;
    letter-spacing: -0.04em;
}

.settings-app main {
    padding: 22px;
}

.settings-app section {
    padding: 18px;
}

.wallpaper-tile {
    min-height: 104px;
    border-radius: 16px;
    align-content: end;
    font-weight: 800;
}

.terminal-app {
    background:
        radial-gradient(circle at 92% 12%, rgba(124, 242, 124, 0.12), transparent 28%),
        #02050b;
}

.terminal-app pre {
    padding: 18px;
    line-height: 1.45;
}

.notepad-app textarea {
    padding: 22px;
    font-size: 16px;
    background:
        linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
        color-mix(in srgb, var(--panel-strong), #fff 8%);
    background-size: 32px 32px, cover;
}

.calculator-app {
    background:
        radial-gradient(circle at 80% 0%, color-mix(in srgb, var(--accent), transparent 76%), transparent 28%),
        transparent;
}

.calc-grid button {
    border-radius: 14px;
}

.viewer-art {
    border-radius: 20px;
}

.store-app,
.games-app {
    background:
        radial-gradient(circle at 86% 12%, color-mix(in srgb, var(--accent), transparent 70%), transparent 28%);
}

.store-hero {
    margin-bottom: 18px;
}

.store-grid article,
.games-app article {
    min-height: 180px;
    display: grid;
    align-content: start;
    gap: 8px;
}

.store-grid article h2,
.games-app article h1 {
    margin: 0;
}

.utility-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    width: min(360px, 100%);
}

.utility-grid span {
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.07);
}

.mines-grid,
.snake-grid {
    padding: 18px;
    gap: 5px;
}

.mines-grid button,
.snake-grid span {
    border-radius: 7px;
}

@media (max-width: 900px) {
    .power-grid,
    .setup-split,
    .boot-layout,
    .progress-card,
    .start-lower {
        grid-template-columns: 1fr;
    }

    .desktop-widget {
        display: none;
    }

    .desktop-icons {
        grid-auto-flow: row;
        grid-template-rows: none;
        grid-template-columns: repeat(3, 94px);
    }

    .start-menu {
        width: calc(100% - 48px);
    }

    .task-search,
    .task-running {
        display: none;
    }
}

/* Hotfix: immersive fullscreen app mode */
#pc-os-overlay.pc-app-fullscreen .pc-frame-top {
    display: none;
}

#pc-os-overlay.pc-app-fullscreen .pc-os-root {
    height: 100vh;
}

.w12-desktop.desktop-fullscreen-app .window-layer {
    inset: 0;
}

.w12-desktop.desktop-fullscreen-app .desktop-widget,
.w12-desktop.desktop-fullscreen-app .w12-taskbar,
.w12-desktop.desktop-fullscreen-app .notification-stack,
.w12-desktop.desktop-fullscreen-app .desktop-icons,
.w12-desktop.desktop-fullscreen-app .desktop-noise,
.w12-desktop.desktop-fullscreen-app .desktop-light,
.w12-desktop.desktop-fullscreen-app .start-menu,
.w12-desktop.desktop-fullscreen-app .quick-panel,
.w12-desktop.desktop-fullscreen-app .desktop-menu,
.w12-desktop.desktop-fullscreen-app .desktop-selection {
    opacity: 0 !important;
    pointer-events: none !important;
}

.w12-desktop.desktop-fullscreen-app .w12-window.max {
    inset: 0 !important;
    width: 100% !important;
    height: 100% !important;
    border: none;
    border-radius: 0;
    box-shadow: none;
    background: #05070b;
}

.w12-desktop.desktop-fullscreen-app .w12-window.max .window-titlebar {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    z-index: 5;
    transform: translateY(-100%);
    opacity: 0;
    transition: transform 0.16s ease, opacity 0.16s ease;
    background: linear-gradient(180deg, rgba(7, 10, 18, 0.96), rgba(7, 10, 18, 0.72));
    backdrop-filter: blur(16px);
}

.w12-desktop.desktop-fullscreen-app .w12-window.max:hover .window-titlebar,
.w12-desktop.desktop-fullscreen-app .w12-window.max:focus-within .window-titlebar {
    transform: translateY(0);
    opacity: 1;
}

.w12-desktop.desktop-fullscreen-app .w12-window.max .window-body {
    height: 100%;
}

.w12-desktop.desktop-fullscreen-app .w12-window.max .resize-handle {
    display: none;
}

/* Hotfix v45: fullscreen app with fixed top frame, no taskbar */
#pc-os-overlay.pc-app-fullscreen .pc-frame-top {
    display: none !important;
}

#pc-os-overlay.pc-app-fullscreen .pc-shell,
#pc-os-overlay.pc-app-fullscreen .pc-os-root {
    width: 100vw;
    height: 100vh;
}

.w12-desktop.desktop-fullscreen-app .window-layer {
    inset: 0 !important;
}

.w12-desktop.desktop-fullscreen-app .desktop-widget,
.w12-desktop.desktop-fullscreen-app .w12-taskbar,
.w12-desktop.desktop-fullscreen-app .notification-stack,
.w12-desktop.desktop-fullscreen-app .desktop-icons,
.w12-desktop.desktop-fullscreen-app .desktop-noise,
.w12-desktop.desktop-fullscreen-app .desktop-light,
.w12-desktop.desktop-fullscreen-app .start-menu,
.w12-desktop.desktop-fullscreen-app .quick-panel,
.w12-desktop.desktop-fullscreen-app .desktop-menu,
.w12-desktop.desktop-fullscreen-app .desktop-selection {
    display: none !important;
}

.w12-desktop.desktop-fullscreen-app .w12-window.max {
    inset: 0 !important;
    width: 100% !important;
    height: 100% !important;
    border: 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    display: flex;
    flex-direction: column;
    background: #05070b;
}

.w12-desktop.desktop-fullscreen-app .w12-window.max .window-titlebar {
    position: relative !important;
    left: auto !important;
    right: auto !important;
    top: auto !important;
    height: 38px;
    min-height: 38px;
    z-index: 2;
    transform: none !important;
    opacity: 1 !important;
    background: linear-gradient(180deg, rgba(12, 15, 24, 0.98), rgba(7, 10, 17, 0.98)) !important;
    border-bottom: 1px solid rgba(255,255,255,0.12);
    backdrop-filter: none;
}

.w12-desktop.desktop-fullscreen-app .w12-window.max .window-body {
    flex: 1;
    height: auto !important;
    min-height: 0;
    overflow: auto;
}

.w12-desktop.desktop-fullscreen-app .w12-window.max .resize-handle {
    display: none !important;
}

/* v61: phone, tablet, and touch-first desktop shell */
#pc-os-overlay,
#pc-os-overlay *,
#pc-os-overlay *::before,
#pc-os-overlay *::after {
    box-sizing: border-box;
}

#pc-os-overlay {
    width: 100%;
    height: 100%;
    height: 100dvh;
    overscroll-behavior: none;
}

.pc-shell {
    width: 100%;
    height: 100%;
    height: 100dvh;
}

.pc-os-root button,
.pc-close {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.pc-os-root button:focus-visible,
.pc-os-root input:focus-visible,
.pc-os-root select:focus-visible,
.pc-os-root textarea:focus-visible,
.pc-close:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--accent, #4cc9ff), transparent 48%);
    outline-offset: 2px;
}

.pc-os-root button:active,
.pc-close:active {
    transform: translateY(1px) scale(0.98);
}

.window-body,
.start-menu,
.quick-panel,
.setup-panel,
.installer-card {
    scrollbar-width: thin;
    scrollbar-color: color-mix(in srgb, var(--accent), transparent 48%) transparent;
}

@media (hover: none), (pointer: coarse) {
    .pc-os-root button,
    .pc-close {
        min-height: 44px;
    }

    .pc-os-root button:hover,
    .pc-close:hover {
        transform: none;
    }
}

@media (max-width: 900px) {
    .pc-frame-top {
        height: auto;
        min-height: calc(46px + env(safe-area-inset-top));
        padding: env(safe-area-inset-top) max(10px, env(safe-area-inset-right)) 0 max(10px, env(safe-area-inset-left));
        flex: 0 0 auto;
    }

    .pc-frame-dot {
        flex: 0 0 auto;
    }

    .pc-close {
        min-width: 74px;
        padding-inline: 14px;
        border-radius: 12px;
    }

    .w12-stage {
        padding: 14px max(12px, env(safe-area-inset-right)) max(14px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
        overflow: auto;
        overscroll-behavior: contain;
        align-items: start;
    }

    .power-card,
    .installer-card,
    .setup-panel,
    .login-card,
    .nosignal-card {
        width: 100%;
        max-width: 680px;
        margin: auto;
        padding: clamp(18px, 4.5vw, 26px);
        border-radius: 22px;
    }

    .power-card h1,
    .installer-card h1,
    .setup-panel h1,
    .login-card h1 {
        font-size: clamp(34px, 9vw, 54px);
        line-height: 0.98;
        overflow-wrap: anywhere;
    }

    .power-grid,
    .setup-split,
    .boot-layout,
    .progress-card,
    .start-lower,
    .firmware-grid,
    .settings-app,
    .taskmgr-app,
    .store-grid,
    .games-app,
    .wallpaper-row {
        grid-template-columns: minmax(0, 1fr) !important;
    }

    .setup-side,
    .device-preview {
        min-width: 0;
    }

    .device-screen {
        height: clamp(170px, 42vw, 250px);
    }

    .boot-menu-panel button {
        min-height: 76px;
    }

    .window-layer {
        inset: 0 0 calc(60px + env(safe-area-inset-bottom));
    }

    .w12-window,
    .w12-window.max {
        inset: 0 !important;
        width: 100% !important;
        height: 100% !important;
        min-width: 0 !important;
        min-height: 0 !important;
        border-width: 0 !important;
        border-radius: 0 !important;
        transform: none !important;
    }

    .window-titlebar,
    .w12-desktop.desktop-fullscreen-app .w12-window.max .window-titlebar {
        height: 50px !important;
        min-height: 50px !important;
        padding: 0 8px 0 max(12px, env(safe-area-inset-left));
        gap: 8px;
    }

    .window-titlebar > strong {
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .window-controls {
        gap: 4px;
        flex: 0 0 auto;
    }

    .window-controls button {
        width: 42px;
        height: 42px;
        min-height: 42px;
    }

    .resize-handle {
        display: none !important;
    }

    .window-body {
        overscroll-behavior: contain;
        -webkit-overflow-scrolling: touch;
    }

    .desktop-icons {
        top: max(12px, env(safe-area-inset-top));
        left: max(10px, env(safe-area-inset-left));
        right: max(10px, env(safe-area-inset-right));
        display: grid;
        grid-auto-flow: column;
        grid-auto-columns: 82px;
        grid-template-columns: none;
        grid-template-rows: 82px;
        gap: 8px;
        overflow-x: auto;
        overscroll-behavior-x: contain;
        scrollbar-width: none;
    }

    .desktop-icons::-webkit-scrollbar {
        display: none;
    }

    .desktop-icon {
        width: 82px;
        min-height: 78px;
        padding: 5px;
    }

    .desktop-widget {
        display: none;
    }

    .w12-taskbar {
        left: max(6px, env(safe-area-inset-left));
        right: max(6px, env(safe-area-inset-right));
        bottom: max(6px, env(safe-area-inset-bottom));
        height: 52px;
        gap: 6px;
        padding: 4px 6px;
        border-radius: 16px;
    }

    .start-button,
    .task-pins button,
    .tray {
        height: 42px;
        min-height: 42px;
    }

    .task-search,
    .task-running {
        display: none;
    }

    .task-pins {
        flex: 1;
        overflow-x: auto;
        scrollbar-width: none;
    }

    .task-pins button {
        width: 42px;
        flex: 0 0 42px;
    }

    .tray {
        padding-inline: 9px;
        font-size: 11px;
    }

    .start-menu,
    .quick-panel {
        left: max(8px, env(safe-area-inset-left));
        right: max(8px, env(safe-area-inset-right));
        bottom: calc(66px + env(safe-area-inset-bottom));
        width: auto;
        max-height: calc(100% - 82px - env(safe-area-inset-top) - env(safe-area-inset-bottom));
        padding: 14px;
        border-radius: 20px;
        overflow: auto;
        overscroll-behavior: contain;
    }

    .start-app-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 8px;
    }

    .start-app-grid button {
        min-width: 0;
        min-height: 76px;
        padding-inline: 5px;
    }

    .start-app-grid button span,
    .start-app-grid button strong {
        max-width: 100%;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .quick-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .notification-stack {
        left: max(8px, env(safe-area-inset-left));
        right: max(8px, env(safe-area-inset-right));
        width: auto;
    }

    .files-toolbar,
    .game-toolbar,
    .browser-bar,
    .note-toolbar {
        flex-wrap: wrap;
    }

    .file-row {
        min-width: 0;
        grid-template-columns: minmax(0, 1fr) auto;
    }

    .browser-page iframe,
    .gamehub-frame,
    .veilchat-frame {
        min-width: 0;
        width: 100%;
    }
}

@media (max-width: 520px) {
    .pc-frame-top {
        font-size: 12px;
    }

    .pc-frame-top > span:not(.pc-frame-dot) {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .brand-row {
        align-items: flex-start;
    }

    .brand-chip {
        flex: 0 0 42px;
    }

    .choice-grid,
    .utility-grid,
    .stat-grid {
        grid-template-columns: minmax(0, 1fr) !important;
    }

    .device-screen > span:nth-of-type(2) {
        left: 34%;
        width: 34%;
    }

    .start-app-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .quick-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .tray span:first-child {
        display: none;
    }

    .settings-app aside,
    .settings-app main,
    .files-app,
    .browser-app,
    .store-app,
    .games-app,
    .notepad-app,
    .taskmgr-app {
        min-width: 0;
    }
}

@media (orientation: landscape) and (max-height: 560px) and (max-width: 960px) {
    .pc-frame-top {
        min-height: calc(40px + env(safe-area-inset-top));
    }

    .window-layer {
        bottom: calc(52px + env(safe-area-inset-bottom));
    }

    .window-titlebar,
    .w12-desktop.desktop-fullscreen-app .w12-window.max .window-titlebar {
        height: 44px !important;
        min-height: 44px !important;
    }

    .w12-taskbar {
        height: 46px;
    }

    .power-grid,
    .setup-split,
    .boot-layout {
        grid-template-columns: minmax(0, 1fr) minmax(220px, 0.8fr) !important;
    }

    .device-screen {
        height: 150px;
    }
}

@media (prefers-reduced-motion: reduce) {
    #pc-os-overlay *,
    #pc-os-overlay *::before,
    #pc-os-overlay *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}