:root {
  --desktop-blue: #008080;
  --desktop-blue-dark: #005d5d;
  --window-gray: #c0c0c0;
  --window-gray-dark: #808080;
  --window-gray-darker: #404040;
  --window-white: #ffffff;
  --window-black: #000000;
  --title-blue: #000080;
  --title-blue-light: #1084d0;
  --taskbar-height: 42px;
  --font-ui: "Tahoma", "MS Sans Serif", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background: #111;
  color: #000;
  font-family: var(--font-ui);
  overflow: hidden;
}

button,
input {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

[hidden] {
  display: none !important;
}

.desktop {
  position: relative;
  width: 100vw;
  height: 100dvh;
  overflow: hidden;
  background: var(--desktop-blue);
}

.desktop__wallpaper {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0) 22%),
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.18), transparent 28%),
    linear-gradient(135deg, var(--desktop-blue), var(--desktop-blue-dark));
}

.desktop::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 3px,
    rgba(0, 0, 0, 0.04) 3px,
    rgba(0, 0, 0, 0.04) 4px
  );
  pointer-events: none;
  z-index: 99999;
}

.desktop__surface {
  position: absolute;
  inset: 0 0 var(--taskbar-height) 0;
  padding: 18px;
}

.desktop-icons {
  position: absolute;
  top: 14px;
  left: 14px;
  display: grid;
  grid-template-columns: repeat(1, 92px);
  gap: 18px;
}

.desktop-icon {
  display: grid;
  gap: 8px;
  justify-items: center;
  width: 92px;
  padding: 4px;
  background: transparent;
  color: #fff;
  text-align: center;
}

.desktop-icon.is-selected,
.desktop-icon:focus-visible,
.desktop-icon:hover {
  background: rgba(0, 0, 128, 0.22);
  outline: 1px dotted #fff;
}

.desktop-icon__art,
.window__title-icon,
.file-row__icon,
.taskbar__start-mark {
  position: relative;
  display: block;
}

.desktop-icon__art {
  width: 34px;
  height: 30px;
}

.desktop-icon__art--folder,
.window__title-icon--folder {
  background: #ffdc67;
  border: 1px solid #654a00;
}

.desktop-icon__art--folder::before,
.window__title-icon--folder::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 3px;
  width: 12px;
  height: 6px;
  background: #ffe699;
  border: 1px solid #654a00;
  border-bottom: 0;
}

.desktop-icon__art--player,
.window__title-icon--player {
  background: #d8d8d8;
  border: 1px solid #333;
  box-shadow: inset -1px -1px 0 #808080, inset 1px 1px 0 #fff;
}

.desktop-icon__art--player::before,
.window__title-icon--player::before {
  content: "";
  position: absolute;
  inset: 5px 5px 11px;
  background: #102910;
  border: 1px solid #000;
}

.desktop-icon__art--note,
.window__title-icon--note {
  background: #fffef2;
  border: 1px solid #333;
}

.desktop-icon__art--paint,
.window__title-icon--paint {
  background: linear-gradient(135deg, #ffed7a 0 50%, #ef5d50 50% 100%);
  border: 1px solid #333;
}

.desktop-icon__art--paint::before,
.window__title-icon--paint::before {
  content: "";
  position: absolute;
  left: 3px;
  right: 3px;
  bottom: 3px;
  height: 6px;
  background: linear-gradient(90deg, #000, #0047ab, #0c8f39, #ffe100, #c52121);
}

.desktop-icon__art--note::before,
.window__title-icon--note::before {
  content: "";
  position: absolute;
  left: 5px;
  right: 5px;
  top: 7px;
  bottom: 6px;
  background:
    repeating-linear-gradient(
      to bottom,
      transparent 0 5px,
      #7a7a7a 5px 6px
    );
}

.desktop-icon__label {
  font-size: 12px;
  line-height: 1.15;
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.45);
}

.window-layer {
  position: absolute;
  inset: 0;
}

.window {
  position: absolute;
  min-width: 280px;
  min-height: 180px;
  max-width: calc(100vw - 24px);
  max-height: calc(100dvh - 62px);
  background: var(--window-gray);
  border-top: 2px solid var(--window-white);
  border-left: 2px solid var(--window-white);
  border-right: 2px solid var(--window-gray-darker);
  border-bottom: 2px solid var(--window-gray-darker);
  box-shadow: 1px 1px 0 #000;
}

.window--active {
  z-index: 20;
}

.window__titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 3px 4px;
  background: linear-gradient(90deg, #7b7b7b, #b5b5b5);
  color: #d7d7d7;
  user-select: none;
}

.window__titlebar--active,
.window--active .window__titlebar {
  background: linear-gradient(90deg, var(--title-blue), var(--title-blue-light));
  color: #fff;
}

.window__title {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  font-size: 12px;
  font-weight: 700;
}

.window__title-icon {
  width: 15px;
  height: 14px;
  flex: 0 0 auto;
}

.window__controls {
  display: flex;
  gap: 2px;
}

.window__control,
.win95-btn,
.taskbar__start,
.taskbar__tray-app,
.taskbar__task {
  background: var(--window-gray);
  border-top: 2px solid var(--window-white);
  border-left: 2px solid var(--window-white);
  border-right: 2px solid var(--window-gray-dark);
  border-bottom: 2px solid var(--window-gray-dark);
  color: #000;
}

.window__control {
  width: 22px;
  height: 20px;
  font-size: 11px;
  line-height: 1;
  font-weight: 700;
  padding: 0;
}

.window__control:active,
.win95-btn:active,
.taskbar__start:active,
.taskbar__tray-app:active,
.taskbar__task:active,
.window--minimized {
  border-top-color: var(--window-gray-dark);
  border-left-color: var(--window-gray-dark);
  border-right-color: var(--window-white);
  border-bottom-color: var(--window-white);
}

.window__body {
  padding: 10px;
  background: var(--window-gray);
  overflow: auto;
}

.folder-window,
.note-window {
  height: 100%;
}

.folder-window__toolbar {
  margin-bottom: 8px;
  padding: 5px 8px;
  font-size: 12px;
  background: #fff;
  border: 2px solid #7a7a7a;
  border-top-color: #404040;
  border-left-color: #404040;
  border-right-color: #fff;
  border-bottom-color: #fff;
}

.folder-window__list {
  display: grid;
  gap: 2px;
}

.file-row {
  display: grid;
  grid-template-columns: 20px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 5px 6px;
  font-size: 12px;
  background: transparent;
  text-align: left;
}

.file-row:hover,
.file-row:focus-visible {
  background: #000080;
  color: #fff;
  outline: 1px dotted #fff;
}

.file-row--disabled,
.file-row--static {
  cursor: default;
}

.file-row--disabled {
  opacity: 0.55;
  pointer-events: none;
}

.file-row__icon {
  width: 16px;
  height: 16px;
  border: 1px solid #000;
}

.file-row__icon--wav {
  background: linear-gradient(180deg, #fff 0 58%, #dcdcdc 58% 100%);
}

.file-row__icon--exe {
  background: #dadada;
  box-shadow: inset -2px -2px 0 #7a7a7a, inset 2px 2px 0 #fff;
}

.file-row__icon--html {
  background: #fff;
}

.file-row__icon--mp4 {
  background: linear-gradient(180deg, #d8ecff 0 55%, #8fbbe3 55% 100%);
}

.file-row__meta {
  color: #333;
}

.file-row:hover .file-row__meta,
.file-row:focus-visible .file-row__meta {
  color: #fff;
}

.player-window {
  display: grid;
  gap: 14px;
}

.video-window {
  display: grid;
  gap: 10px;
}

.video-window__screen {
  background: #000;
  border: 2px solid #404040;
  border-top-color: #000;
  border-left-color: #000;
  border-right-color: #fff;
  border-bottom-color: #fff;
  padding: 6px;
}

.video-window__player {
  display: block;
  width: 100%;
  min-height: 320px;
  background: #000;
}

.video-window__caption {
  display: grid;
  gap: 4px;
  font-size: 12px;
}

.game-window {
  display: grid;
  gap: 10px;
}

.game-window__info {
  display: grid;
  gap: 4px;
  font-size: 12px;
}

.game-window__screen {
  background: #000;
  border: 2px solid;
  border-top-color: #404040;
  border-left-color: #404040;
  border-right-color: #fff;
  border-bottom-color: #fff;
  padding: 6px;
  min-height: 480px;
}

.game-window__player {
  width: 100%;
  min-height: 460px;
  background: #000;
}

.dialog-window {
  display: grid;
  gap: 10px;
}

.dialog-window__text,
.dialog-window__file {
  margin: 0;
  font-size: 12px;
  line-height: 1.5;
}

.dialog-window__file {
  padding: 6px 8px;
  background: #fff;
  border: 2px solid;
  border-top-color: #404040;
  border-left-color: #404040;
  border-right-color: #fff;
  border-bottom-color: #fff;
  word-break: break-word;
}

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

.paint-window {
  display: grid;
  gap: 10px;
}

.paint-window__toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 6px;
  background: #d8d8d8;
  border: 2px solid;
  border-top-color: #404040;
  border-left-color: #404040;
  border-right-color: #fff;
  border-bottom-color: #fff;
}

.paint-window__tools {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.paint-window__control {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
}

.paint-tool.is-active {
  border-top-color: var(--window-gray-dark);
  border-left-color: var(--window-gray-dark);
  border-right-color: var(--window-white);
  border-bottom-color: var(--window-white);
  font-weight: 700;
}

.paint-window__stage {
  overflow: auto;
  background: #808080;
  border: 2px solid;
  border-top-color: #404040;
  border-left-color: #404040;
  border-right-color: #fff;
  border-bottom-color: #fff;
  padding: 10px;
}

.paint-window__canvas {
  display: block;
  width: 100%;
  max-width: 960px;
  background: #fff;
  border: 1px solid #000;
  cursor: crosshair;
  touch-action: none;
}

.player-window__screen {
  min-height: 112px;
  padding: 14px;
  background: #081808;
  color: #6dff6d;
  border: 2px solid #404040;
  border-top-color: #000;
  border-left-color: #000;
  border-right-color: #fff;
  border-bottom-color: #fff;
}

.player-window__status {
  margin: 0 0 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.player-window__file {
  margin: 0 0 8px;
  font-size: 16px;
  line-height: 1.25;
}

.player-window__meta {
  margin: 0;
  font-size: 12px;
  line-height: 1.4;
}

.player-window__seek-wrap,
.player-window__volume {
  display: grid;
  gap: 6px;
  font-size: 12px;
}

.player-window__times {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
}

.player-window__buttons {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.win95-btn {
  min-height: 28px;
  padding: 4px 8px;
  font-size: 12px;
}

.player-window__seek,
.player-window__volume-slider {
  width: 100%;
}

.note-window__text {
  min-height: 240px;
  margin: 0;
  padding: 8px;
  overflow: auto;
  background: #fff;
  border: 2px solid #7a7a7a;
  border-top-color: #404040;
  border-left-color: #404040;
  border-right-color: #fff;
  border-bottom-color: #fff;
  color: #000;
  font: 12px/1.5 "Courier New", monospace;
  white-space: pre-wrap;
}

.start-menu {
  position: absolute;
  left: 0;
  bottom: var(--taskbar-height);
  display: grid;
  grid-template-columns: 38px 220px;
  min-height: 260px;
  background: var(--window-gray);
  border-top: 2px solid var(--window-white);
  border-left: 2px solid var(--window-white);
  border-right: 2px solid var(--window-gray-dark);
  border-bottom: 2px solid var(--window-gray-dark);
  box-shadow: 2px -2px 0 rgba(0, 0, 0, 0.35);
  z-index: 40;
}

.start-menu__brand {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 4px;
  padding: 10px 4px;
  background: linear-gradient(180deg, #7f7f7f, #bdbdbd);
  color: #fff;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 13px;
  font-weight: 700;
}

.start-menu__items {
  display: grid;
  align-content: start;
  padding: 4px;
}

.start-menu__item {
  min-height: 34px;
  padding: 6px 10px;
  background: transparent;
  text-align: left;
  font-size: 13px;
}

.start-menu__item:hover,
.start-menu__item:focus-visible {
  background: #000080;
  color: #fff;
  outline: none;
}

.taskbar {
  position: absolute;
  inset: auto 0 0 0;
  height: var(--taskbar-height);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: stretch;
  gap: 4px;
  padding: 4px;
  background: var(--window-gray);
  border-top: 2px solid var(--window-white);
}

.taskbar__start {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-width: 86px;
  padding: 0 10px;
  font-size: 14px;
  font-weight: 700;
}

.taskbar__start-mark {
  width: 16px;
  height: 16px;
  background:
    linear-gradient(135deg, #ff1f29 0 50%, #1ea23c 50% 100%);
  border: 1px solid #000;
}

.taskbar__tasks {
  display: flex;
  gap: 4px;
  min-width: 0;
}

.taskbar__task,
.taskbar__tray-app {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 130px;
  padding: 0 10px;
  font-size: 12px;
  text-align: left;
}

.taskbar__task--active {
  border-top-color: var(--window-gray-dark);
  border-left-color: var(--window-gray-dark);
  border-right-color: var(--window-white);
  border-bottom-color: var(--window-white);
  font-weight: 700;
}

.taskbar__task--minimized {
  color: #444;
}

.taskbar__tray {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 8px;
  border: 2px solid;
  border-top-color: var(--window-gray-dark);
  border-left-color: var(--window-gray-dark);
  border-right-color: var(--window-white);
  border-bottom-color: var(--window-white);
  background: var(--window-gray);
}

.taskbar__clock {
  min-width: 70px;
  font-size: 12px;
  text-align: center;
}

@media (max-width: 960px) {
  .desktop__surface {
    padding: 14px;
  }

  .window {
    max-width: calc(100vw - 28px);
  }

  .window--player,
  .window--folder,
  .window--note,
  .window--video {
    width: min(92vw, 460px) !important;
  }

  .window--paint {
    width: min(94vw, 760px) !important;
  }
}

/* ── My Computer icon ─────────────────────────── */
.desktop-icon__art--computer,
.window__title-icon--computer {
  background: #c8c8c8;
  border: 1px solid #333;
  box-shadow: inset -1px -1px 0 #808080, inset 1px 1px 0 #fff;
}

.desktop-icon__art--computer::before,
.window__title-icon--computer::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 3px;
  right: 3px;
  bottom: 8px;
  background: #000080;
  border: 1px solid #000;
}

.desktop-icon__art--computer::after,
.window__title-icon--computer::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 9px;
  right: 9px;
  height: 4px;
  background: #808080;
}

/* ── Drive + sysinfo ──────────────────────────── */
.file-row__icon--drive-c,
.file-row__icon--drive-a,
.file-row__icon--drive-d {
  background: #d8d8d8;
  box-shadow: inset -1px -1px 0 #808080, inset 1px 1px 0 #fff;
}

.sysinfo-panel {
  margin-top: 10px;
  padding: 8px;
  background: #fff;
  border: 2px solid;
  border-top-color: #404040;
  border-left-color: #404040;
  border-right-color: #fff;
  border-bottom-color: #fff;
  font-size: 11px;
}

.sysinfo-panel__title {
  font-weight: 700;
  margin-bottom: 6px;
}

.sysinfo-panel__grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3px 12px;
}

.sysinfo-panel__label {
  color: #555;
  font-weight: 700;
}

/* ── Screen saver ─────────────────────────────── */
#screensaver {
  position: fixed;
  inset: 0;
  background: #000;
  z-index: 90000;
  cursor: none;
}

#screensaver-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* ── Shut Down screen ─────────────────────────── */
#shutdown-screen {
  position: fixed;
  inset: 0;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 91000;
  cursor: default;
}

#shutdown-screen p {
  color: #c87000;
  font-size: clamp(18px, 3vw, 32px);
  font-weight: 700;
  text-align: center;
  line-height: 1.6;
  margin: 0;
  font-family: var(--font-ui);
}

/* ── Context menu ─────────────────────────────── */
.context-menu {
  position: fixed;
  z-index: 50000;
  background: var(--window-gray);
  border-top: 2px solid #fff;
  border-left: 2px solid #fff;
  border-right: 2px solid #404040;
  border-bottom: 2px solid #404040;
  box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.5);
  min-width: 160px;
}

.context-menu__list {
  list-style: none;
  margin: 0;
  padding: 2px;
}

.context-menu__item {
  padding: 4px 20px 4px 10px;
  font-size: 12px;
  cursor: default;
  white-space: nowrap;
  user-select: none;
}

.context-menu__item:hover {
  background: #000080;
  color: #fff;
}

.context-menu__item--gray {
  color: #808080;
  pointer-events: none;
}

.context-menu__separator {
  height: 1px;
  background: #808080;
  margin: 2px 4px;
  box-shadow: 0 1px 0 #fff;
}

/* ── Start menu shutdown ──────────────────────── */
.start-menu__item--shutdown {
  border-top: 1px solid #808080;
  margin-top: 6px;
}

@media (max-width: 720px) {
  .desktop-icons {
    grid-template-columns: repeat(2, 92px);
  }

  .taskbar {
    grid-template-columns: auto 1fr;
    grid-template-rows: 1fr auto;
  }

  .taskbar__tray {
    grid-column: 1 / -1;
    justify-content: space-between;
  }

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

  .file-row {
    grid-template-columns: 20px 1fr;
  }

  .file-row__meta {
    grid-column: 2;
  }
}