:root {
  --win98-face: #c0c0c0;
  --win98-shadow: #808080;
  --win98-dark: #404040;
  --win98-light: #ffffff;
  --win98-blue: #000080;
  --desktop: #008080;
  --text: #050505;
}

* {
  box-sizing: border-box;
}

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

body {
  overflow: hidden;
  color: var(--text);
  font-family: "MS Sans Serif", Tahoma, Arial, sans-serif;
  font-size: 12px;
  background: var(--desktop);
}

button {
  font: inherit;
}

.desktop {
  position: relative;
  width: 100vw;
  height: calc(100vh - 34px);
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 22%, rgba(255, 255, 255, 0.12) 0 1px, transparent 1px 100%),
    linear-gradient(135deg, #008080 0%, #006f73 55%, #007b7b 100%);
  background-size: 18px 18px, 100% 100%;
}

.desktop-icons {
  position: relative;
  height: 100%;
}

.desktop-icon {
  position: absolute;
  width: 76px;
  min-height: 70px;
  padding: 4px;
  border: 1px dotted transparent;
  color: #fff;
  text-align: center;
  text-shadow: 1px 1px #000;
  background: transparent;
  cursor: default;
  touch-action: none;
  user-select: none;
}

.desktop-icon.is-dragging {
  z-index: 5;
}

.desktop-icon:focus,
.desktop-icon.is-selected {
  outline: none;
  border-color: #fff;
  background: rgba(0, 0, 128, 0.45);
}

.icon-art {
  width: 34px;
  height: 34px;
  margin: 0 auto 5px;
}

span.icon-art {
  display: grid;
  place-items: center;
  border: 2px solid var(--win98-light);
  border-right-color: var(--win98-shadow);
  border-bottom-color: var(--win98-shadow);
  color: #111;
  font-size: 20px;
  line-height: 1;
  text-shadow: none;
  background: #f1d66a;
  box-shadow: 1px 1px 0 #000;
}

.icon-art.folder {
  background: linear-gradient(#ffe89a 0 35%, #e5bd3b 35% 100%);
}

.icon-art.terminal {
  color: #39ff57;
  background: #111;
}

.icon-art.info {
  color: #fff;
  background: #2454c6;
}

.icon-art.github {
  color: #fff;
  background: #2b2b2b;
}

.icon-art.trash {
  position: relative;
  border: 1px solid #000;
  background: linear-gradient(#f7f7f7, #cfcfcf);
  box-shadow: inset 2px 0 0 #fff, inset -2px 0 0 #808080, 1px 1px 0 #000;
}

.icon-art.trash::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 7px;
  width: 18px;
  height: 5px;
  border: 1px solid #000;
  background: #dcdcdc;
}

.icon-art.trash::after {
  content: "";
  position: absolute;
  inset: 7px 8px 5px;
  border-left: 1px solid #808080;
  border-right: 1px solid #808080;
}

.icon-label {
  display: block;
  overflow-wrap: anywhere;
}

.windows-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.window {
  position: absolute;
  display: flex;
  flex-direction: column;
  min-width: 280px;
  min-height: 180px;
  border: 2px solid var(--win98-face);
  border-top-color: var(--win98-light);
  border-left-color: var(--win98-light);
  border-right-color: var(--win98-dark);
  border-bottom-color: var(--win98-dark);
  background: var(--win98-face);
  box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.4);
  pointer-events: auto;
  overflow: hidden;
}

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

.titlebar {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 24px;
  padding: 2px 3px;
  color: #fff;
  background: linear-gradient(90deg, var(--win98-blue), #1084d0);
  cursor: move;
  user-select: none;
}

.titlebar-title {
  flex: 1;
  overflow: hidden;
  font-weight: 700;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.titlebar-button {
  display: grid;
  place-items: center;
  width: 18px;
  height: 18px;
  padding: 0;
  border: 2px solid var(--win98-face);
  border-top-color: var(--win98-light);
  border-left-color: var(--win98-light);
  border-right-color: var(--win98-dark);
  border-bottom-color: var(--win98-dark);
  background: var(--win98-face);
}

.window-body {
  flex: 1;
  min-height: 0;
  margin: 2px;
  padding: 8px;
  overflow: auto;
  border: 2px solid var(--win98-shadow);
  border-top-color: var(--win98-dark);
  border-left-color: var(--win98-dark);
  border-right-color: var(--win98-light);
  border-bottom-color: var(--win98-light);
  background: #fff;
}

.resize-grip {
  position: absolute;
  right: 2px;
  bottom: 2px;
  width: 14px;
  height: 14px;
  padding: 0;
  border: 0;
  background:
    linear-gradient(135deg, transparent 0 45%, var(--win98-shadow) 45% 52%, transparent 52% 100%),
    linear-gradient(135deg, transparent 0 62%, var(--win98-light) 62% 69%, transparent 69% 100%);
  cursor: nwse-resize;
}

.resize-grip:focus {
  outline: 1px dotted #000;
}

.folder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(92px, 1fr));
  gap: 10px;
}

.folder-item {
  min-height: 76px;
  padding: 5px;
  border: 1px dotted transparent;
  text-align: center;
  background: transparent;
  cursor: default;
}

.folder-item:focus,
.folder-item:hover {
  outline: none;
  border-color: var(--win98-blue);
  background: #dce8ff;
}

.file-icon {
  width: 34px;
  height: 40px;
  margin: 0 auto 5px;
}

span.file-icon {
  display: grid;
  place-items: center;
  border: 1px solid #000;
  background: linear-gradient(135deg, #fff 0 76%, #dcdcdc 76% 100%);
  color: #000080;
  font-weight: 700;
}

.image-icon {
  display: block;
  object-fit: contain;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

img.file-icon {
  height: 34px;
}

.code-window {
  min-width: min(720px, calc(100vw - 24px));
  min-height: min(480px, calc(100vh - 80px));
}

.code-shell {
  display: grid;
  grid-template-rows: auto minmax(180px, 1fr) minmax(92px, 0.45fr);
  gap: 6px;
  height: 100%;
  min-height: 0;
}

.code-toolbar {
  display: flex;
  gap: 5px;
  min-height: 26px;
}

.win98-button {
  min-width: 64px;
  height: 24px;
  padding: 0 10px;
  border: 2px solid var(--win98-face);
  border-top-color: var(--win98-light);
  border-left-color: var(--win98-light);
  border-right-color: var(--win98-dark);
  border-bottom-color: var(--win98-dark);
  background: var(--win98-face);
}

.win98-button:active:not(:disabled) {
  border-top-color: var(--win98-dark);
  border-left-color: var(--win98-dark);
  border-right-color: var(--win98-light);
  border-bottom-color: var(--win98-light);
}

.win98-button:disabled {
  color: var(--win98-shadow);
  text-shadow: 1px 1px var(--win98-light);
}

.code-viewer {
  height: 100%;
  margin: 0;
  padding: 10px;
  overflow: auto;
  color: #d7ffd7;
  background: #071107;
  font: 13px/1.45 Consolas, "Courier New", monospace;
  white-space: pre;
}

.python-output {
  height: 100%;
  margin: 0;
  padding: 8px;
  overflow: auto;
  border: 2px solid var(--win98-shadow);
  border-top-color: var(--win98-dark);
  border-left-color: var(--win98-dark);
  border-right-color: var(--win98-light);
  border-bottom-color: var(--win98-light);
  color: #39ff57;
  background: #050505;
  font: 13px/1.45 Consolas, "Courier New", monospace;
  white-space: pre-wrap;
}

.browser-shell {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 6px;
  height: 100%;
  min-height: 0;
}

.browser-toolbar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px;
}

.browser-address-label {
  color: #111;
}

.browser-address {
  height: 24px;
  min-width: 0;
  padding: 2px 5px;
  border: 2px solid var(--win98-shadow);
  border-top-color: var(--win98-dark);
  border-left-color: var(--win98-dark);
  border-right-color: var(--win98-light);
  border-bottom-color: var(--win98-light);
  background: #fff;
  font: inherit;
}

.browser-open-link {
  display: inline-grid;
  place-items: center;
  color: #000;
  text-decoration: none;
}

.browser-page {
  min-height: 0;
  overflow: auto;
  padding: 16px;
  border: 2px solid var(--win98-shadow);
  border-top-color: var(--win98-dark);
  border-left-color: var(--win98-dark);
  border-right-color: var(--win98-light);
  border-bottom-color: var(--win98-light);
  background: #fff;
}

.github-profile {
  max-width: 860px;
  margin: 0 auto;
  color: #111;
  font-family: Tahoma, Arial, sans-serif;
}

.github-profile-header {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding-bottom: 14px;
  border-bottom: 1px solid #b8b8b8;
}

.github-avatar {
  width: 96px;
  height: 96px;
  border: 1px solid #808080;
  object-fit: cover;
}

.github-profile h2,
.github-profile h3,
.github-profile h4,
.github-profile p {
  margin-top: 0;
}

.github-profile h2 {
  margin-bottom: 2px;
  font-size: 22px;
}

.github-login {
  margin-bottom: 10px;
  color: #555;
}

.github-bio {
  margin-bottom: 12px;
  line-height: 1.4;
}

.github-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 0;
}

.github-stats dt {
  font-weight: 700;
}

.github-stats dd {
  margin: 0;
}

.github-repos {
  display: grid;
  gap: 8px;
}

.github-repo {
  padding: 10px;
  border: 1px solid #b8b8b8;
  background: #f8f8f8;
}

.github-repo h4 {
  margin-bottom: 6px;
  color: #000080;
  font-size: 14px;
}

.github-repo p {
  margin-bottom: 6px;
  line-height: 1.35;
}

.github-repo-meta {
  margin-bottom: 0;
  color: #555;
  font-size: 11px;
}

.terminal-placeholder {
  height: 100%;
  margin: 0;
  padding: 10px;
  color: #39ff57;
  background: #050505;
  font: 13px/1.45 Consolas, "Courier New", monospace;
}

.taskbar {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 34px;
  padding: 3px 5px;
  border-top: 2px solid var(--win98-light);
  background: var(--win98-face);
}

.start-button,
.taskbar-item,
.clock {
  height: 26px;
  border: 2px solid var(--win98-face);
  border-top-color: var(--win98-light);
  border-left-color: var(--win98-light);
  border-right-color: var(--win98-dark);
  border-bottom-color: var(--win98-dark);
  background: var(--win98-face);
}

.start-button {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-width: 72px;
  padding: 0 8px;
  font-weight: 700;
}

.start-button:active,
.taskbar-item.is-active {
  border-top-color: var(--win98-dark);
  border-left-color: var(--win98-dark);
  border-right-color: var(--win98-light);
  border-bottom-color: var(--win98-light);
}

.start-logo {
  width: 16px;
  height: 16px;
  background: url("assets/icons/windows-0.png") center / contain no-repeat;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.taskbar-items {
  display: flex;
  flex: 1;
  gap: 4px;
  min-width: 0;
}

.taskbar-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  max-width: 180px;
  min-width: 90px;
  padding: 0 8px;
  overflow: hidden;
  text-align: left;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.taskbar-icon {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  object-fit: contain;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.taskbar-label {
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.clock {
  display: grid;
  place-items: center;
  min-width: 76px;
  padding: 0 8px;
  border-top-color: var(--win98-shadow);
  border-left-color: var(--win98-shadow);
  border-right-color: var(--win98-light);
  border-bottom-color: var(--win98-light);
}

.message {
  max-width: 54ch;
  line-height: 1.45;
}

.muted {
  color: #555;
}

.report-card h2 {
  margin: 0 0 10px;
}

.report-card dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 8px 14px;
  margin: 0;
}

.report-card dt {
  font-weight: 700;
}

.report-card dd {
  margin: 0;
}

.quiz-window { min-width: min(520px, calc(100vw - 16px)); min-height: min(420px, calc(100vh - 50px)); }
.quiz-window .window-body { padding: 0; background: var(--win98-face); }
.quiz-app { min-height: 100%; height: 100%; overflow: auto; }
.quiz-welcome { max-width: 560px; margin: 50px auto; padding: 28px; border: 2px solid var(--win98-shadow); border-top-color: var(--win98-light); border-left-color: var(--win98-light); background: #fff; }
.quiz-welcome h1, .quiz-results h1 { margin: 0 0 12px; font-size: 22px; }
.quiz-welcome p { font-size: 13px; line-height: 1.5; }
.quiz-summary-list { margin: 18px 0 24px; padding-left: 22px; line-height: 1.8; }
.quiz-history { margin-top: 24px; padding-top: 14px; border-top: 1px solid #aaa; }
.quiz-history-heading { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.quiz-history-heading h2 { margin: 0; font-size: 15px; }
.quiz-history-list { display: grid; gap: 4px; margin-top: 8px; }
.quiz-history-row { display: grid; grid-template-columns: 50px 1fr auto; gap: 8px; padding: 6px; border: 1px solid #bbb; background: #f2f2f2; }
.quiz-history-row time { color: #555; }
.quiz-header { display: grid; grid-template-columns: 1fr auto; gap: 8px 16px; padding: 14px 16px; border-bottom: 1px solid var(--win98-shadow); background: var(--win98-face); }
.quiz-topic { color: #333; }
.quiz-progress { grid-column: 1 / -1; height: 18px; padding: 2px; border: 2px solid; border-color: var(--win98-dark) var(--win98-light) var(--win98-light) var(--win98-dark); background: #fff; }
.quiz-progress-fill { display: block; height: 100%; background: var(--win98-blue); }
.quiz-question { min-height: calc(100% - 70px); padding: 24px; background: #fff; }
.quiz-fieldset { margin: 0; padding: 18px; border: 1px solid var(--win98-shadow); }
.quiz-prompt { max-width: 90%; padding: 0 7px; font-size: 16px; font-weight: 700; line-height: 1.4; }
.quiz-choice { display: flex; gap: 10px; align-items: flex-start; margin: 10px 0; padding: 10px; border: 1px dotted transparent; font-size: 13px; line-height: 1.35; cursor: pointer; }
.quiz-choice:hover, .quiz-choice:has(input:checked) { border-color: var(--win98-blue); background: #e8edff; }
.quiz-choice input { margin: 1px 0 0; }
.quiz-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; margin-top: 18px; }
.quiz-notice { padding: 8px; border: 1px solid #9a0000; color: #800000; background: #fff2f2; }
.quiz-results { padding: 18px; background: #fff; }
.quiz-score-hero { display: flex; gap: 18px; align-items: center; margin: -18px -18px 18px; padding: 18px; color: #fff; background: var(--win98-blue); }
.quiz-score-hero h1, .quiz-score-hero p { margin: 0 0 4px; }
.quiz-score { font-size: 36px; }
.quiz-results h2 { margin: 22px 0 9px; font-size: 15px; }
.quiz-breakdown, .quiz-topic-grid { display: grid; gap: 8px; }
.quiz-topic-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.quiz-result-row { display: grid; grid-template-columns: minmax(150px, 1fr) minmax(80px, 1fr) 44px; gap: 8px; align-items: center; padding: 7px; border: 1px solid #aaa; background: #f4f4f4; }
.quiz-result-label { display: grid; gap: 2px; }
.quiz-result-label small { color: #555; }
.quiz-meter { height: 14px; padding: 1px; border: 1px solid #777; background: #fff; }
.quiz-meter span { display: block; height: 100%; background: var(--win98-blue); }
.quiz-result-percent { text-align: right; }
.quiz-recommendation { margin-top: 18px; padding: 12px; border: 1px solid #a88000; background: #fff8cf; }
.quiz-recommendation h2 { margin-top: 0; }
.quiz-review { display: grid; gap: 10px; }
.quiz-review-item { padding: 12px; border-left: 5px solid #087a08; background: #f2fff2; }
.quiz-review-item.is-incorrect { border-left-color: #a00000; background: #fff2f2; }
.quiz-review-item h3 { margin: 0 0 8px; font-size: 13px; }
.quiz-review-item p { margin: 5px 0; line-height: 1.4; }
.quiz-explanation { color: #333; font-style: italic; }

@media (max-width: 640px) {
  .window {
    max-width: calc(100vw - 16px);
    max-height: calc(100vh - 50px);
  }

  .taskbar-item {
    min-width: 64px;
  }
  .quiz-topic-grid { grid-template-columns: 1fr; }
  .quiz-result-row { grid-template-columns: 1fr 80px 38px; }
  .quiz-question { padding: 12px; }
}