/* Windows 98 Color Palette */
:root {
  --win98-desktop: #008080;
  --win98-gray: #c0c0c0;
  --win98-dark-gray: #808080;
  --win98-white: #ffffff;
  --win98-black: #000000;
  --win98-title-blue: #000080;
  --win98-title-active: #000080;
  --win98-title-inactive: #808080;
  --win98-start-green: #008000;
  --win98-border-light: #dfdfdf;
  --win98-border-dark: #404040;
  --win98-button-face: #c0c0c0;
}

/* Reset and Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  overflow: hidden;
  font-family: 'MS Sans Serif', 'Tahoma', 'Arial', sans-serif;
  font-size: 11px;
  cursor: default;
}

/* Desktop */
.desktop {
  width: 100vw;
  height: 100vh;
  background-color: var(--win98-desktop);
  position: relative;
  overflow: hidden;
}

/* Icon Grid - Two columns for more icons */
.icon-grid {
  position: absolute;
  top: 10px;
  left: 10px;
  display: grid;
  grid-template-columns: repeat(2, 80px);
  grid-auto-rows: 80px;
  gap: 8px;
}


/* Desktop Icon */
.desktop-icon {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 70px;
  padding: 4px;
  cursor: pointer;
  text-align: center;
}

.desktop-icon.selected {
  background-color: var(--win98-title-blue);
}

.desktop-icon.selected .icon-label {
  color: var(--win98-white);
  background-color: var(--win98-title-blue);
}

.icon-image {
  width: 32px;
  height: 32px;
  image-rendering: pixelated;
  margin-bottom: 4px;
}

.icon-label {
  color: var(--win98-white);
  text-shadow: 1px 1px var(--win98-black);
  font-size: 11px;
  word-wrap: break-word;
  max-width: 70px;
}

/* Window Layer */
.window-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: calc(100% - 28px);
  pointer-events: none;
}

.window-layer > * {
  pointer-events: auto;
}

/* Window */
.window {
  position: absolute;
  background-color: var(--win98-gray);
  border: 2px solid;
  border-color: var(--win98-border-light) var(--win98-border-dark) var(--win98-border-dark) var(--win98-border-light);
  min-width: 200px;
  min-height: 100px;
}

.window-titlebar {
  background-color: var(--win98-title-blue);
  color: var(--win98-white);
  padding: 2px 4px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: move;
  user-select: none;
}

.window-titlebar.inactive {
  background-color: var(--win98-title-inactive);
}

.window-title {
  font-weight: bold;
  font-size: 11px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.window-controls {
  display: flex;
  gap: 2px;
}

.window-btn {
  width: 16px;
  height: 14px;
  background-color: var(--win98-gray);
  border: 2px solid;
  border-color: var(--win98-border-light) var(--win98-border-dark) var(--win98-border-dark) var(--win98-border-light);
  font-size: 9px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
}

.window-btn:active {
  border-color: var(--win98-border-dark) var(--win98-border-light) var(--win98-border-light) var(--win98-border-dark);
}

.window-content {
  padding: 8px;
  background-color: var(--win98-white);
  margin: 2px;
  height: calc(100% - 24px);
  overflow-y: auto;
  font-size: 12px;
  line-height: 1.4;
}


/* Classic Scrollbar */
.window-content::-webkit-scrollbar {
  width: 16px;
}

.window-content::-webkit-scrollbar-track {
  background: var(--win98-gray);
  border: 1px solid var(--win98-dark-gray);
}

.window-content::-webkit-scrollbar-thumb {
  background-color: var(--win98-gray);
  border: 2px solid;
  border-color: var(--win98-border-light) var(--win98-border-dark) var(--win98-border-dark) var(--win98-border-light);
}

.window-content::-webkit-scrollbar-button {
  background-color: var(--win98-gray);
  border: 2px solid;
  border-color: var(--win98-border-light) var(--win98-border-dark) var(--win98-border-dark) var(--win98-border-light);
  height: 16px;
}

/* Taskbar */
.taskbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 28px;
  background-color: var(--win98-gray);
  border-top: 2px solid var(--win98-border-light);
  display: flex;
  align-items: center;
  padding: 2px 4px;
  z-index: 9999;
}

/* Start Button */
.start-button {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  background-color: var(--win98-gray);
  border: 2px solid;
  border-color: var(--win98-border-light) var(--win98-border-dark) var(--win98-border-dark) var(--win98-border-light);
  font-family: inherit;
  font-size: 11px;
  font-weight: bold;
  cursor: pointer;
}

.start-button:active,
.start-button.active {
  border-color: var(--win98-border-dark) var(--win98-border-light) var(--win98-border-light) var(--win98-border-dark);
}

.start-icon {
  width: 16px;
  height: 16px;
  background-color: var(--win98-start-green);
  display: inline-block;
}

/* Taskbar Buttons Area */
.taskbar-buttons {
  flex: 1;
  display: flex;
  gap: 2px;
  margin-left: 4px;
  overflow: hidden;
}

.taskbar-btn {
  max-width: 160px;
  min-width: 80px;
  height: 22px;
  padding: 2px 8px;
  background-color: var(--win98-gray);
  border: 2px solid;
  border-color: var(--win98-border-light) var(--win98-border-dark) var(--win98-border-dark) var(--win98-border-light);
  font-family: inherit;
  font-size: 11px;
  text-align: left;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.taskbar-btn.active {
  border-color: var(--win98-border-dark) var(--win98-border-light) var(--win98-border-light) var(--win98-border-dark);
  background-color: #dfdfdf;
}

/* System Tray */
.system-tray {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border: 1px solid;
  border-color: var(--win98-border-dark) var(--win98-border-light) var(--win98-border-light) var(--win98-border-dark);
  margin-left: auto;
}

.tray-icon {
  width: 16px;
  height: 16px;
  background-color: var(--win98-dark-gray);
}

.clock {
  font-size: 11px;
  padding-left: 4px;
}


/* Start Menu */
.start-menu {
  position: fixed;
  bottom: 28px;
  left: 0;
  background-color: var(--win98-gray);
  border: 2px solid;
  border-color: var(--win98-border-light) var(--win98-border-dark) var(--win98-border-dark) var(--win98-border-light);
  min-width: 200px;
  z-index: 10000;
}

.start-menu.hidden {
  display: none;
}

.start-menu-sidebar {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 24px;
  background: linear-gradient(to top, var(--win98-title-blue), var(--win98-dark-gray));
  writing-mode: vertical-rl;
  text-orientation: mixed;
  color: var(--win98-white);
  font-weight: bold;
  font-size: 18px;
  padding: 8px 4px;
  display: flex;
  align-items: flex-end;
}

.start-menu-items {
  margin-left: 24px;
  padding: 2px 0;
}

.menu-item {
  display: flex;
  align-items: center;
  padding: 4px 24px 4px 8px;
  cursor: pointer;
  position: relative;
}

.menu-item:hover {
  background-color: var(--win98-title-blue);
  color: var(--win98-white);
}

.menu-item-icon {
  width: 16px;
  height: 16px;
  margin-right: 8px;
  image-rendering: pixelated;
}

.menu-item-arrow {
  position: absolute;
  right: 8px;
}

.menu-separator {
  height: 2px;
  margin: 4px 8px;
  border-top: 1px solid var(--win98-border-dark);
  border-bottom: 1px solid var(--win98-border-light);
}

/* Submenu */
.submenu {
  position: absolute;
  left: 100%;
  top: -2px;
  background-color: var(--win98-gray);
  border: 2px solid;
  border-color: var(--win98-border-light) var(--win98-border-dark) var(--win98-border-dark) var(--win98-border-light);
  min-width: 200px;
  display: none;
  z-index: 10001;
}

.menu-item:hover > .submenu {
  display: block;
}

/* Nested submenu positioning */
.submenu .submenu {
  left: 100%;
  top: -2px;
}

/* 3D Button Utility */
.btn-3d {
  background-color: var(--win98-gray);
  border: 2px solid;
  border-color: var(--win98-border-light) var(--win98-border-dark) var(--win98-border-dark) var(--win98-border-light);
  font-family: inherit;
  cursor: pointer;
}

.btn-3d:active {
  border-color: var(--win98-border-dark) var(--win98-border-light) var(--win98-border-light) var(--win98-border-dark);
}

/* Dialog */
.dialog-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10001;
}

.dialog {
  background-color: var(--win98-gray);
  border: 2px solid;
  border-color: var(--win98-border-light) var(--win98-border-dark) var(--win98-border-dark) var(--win98-border-light);
  padding: 16px;
  text-align: center;
}

.dialog-buttons {
  margin-top: 16px;
  display: flex;
  gap: 8px;
  justify-content: center;
}

.dialog-btn {
  padding: 4px 24px;
}

/* Content Styling */
.content-heading {
  font-size: 14px;
  font-weight: bold;
  margin: 16px 0 8px 0;
  color: var(--win98-title-blue);
}

.content-heading:first-child {
  margin-top: 0;
}

.content-paragraph {
  margin-bottom: 8px;
}

.content-list {
  margin: 8px 0 8px 24px;
}

.content-list li {
  margin-bottom: 4px;
}

/* Hidden utility */
.hidden {
  display: none !important;
}


/* ============ ENHANCED STYLES ============ */

/* Better title bar gradient effect (Win98 style) */
.window-titlebar {
  background: linear-gradient(90deg, #000080 0%, #1084d0 100%);
}

.window-titlebar.inactive {
  background: linear-gradient(90deg, #808080 0%, #b0b0b0 100%);
}

/* Quiz Styles */
.quiz-container {
  background-color: #ffffcc;
  border: 2px inset var(--win98-gray);
  padding: 12px;
  margin: 8px 0;
}

.quiz-question {
  font-weight: bold;
  margin-bottom: 12px;
  color: #000080;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background-color: var(--win98-gray);
  border: 2px solid;
  border-color: var(--win98-border-light) var(--win98-border-dark) var(--win98-border-dark) var(--win98-border-light);
  cursor: pointer;
  font-size: 11px;
}

.quiz-option:hover {
  background-color: #e0e0e0;
}

.quiz-option.correct {
  background-color: #90ee90;
  border-color: #228b22;
}

.quiz-option.wrong {
  background-color: #ffb6c1;
  border-color: #dc143c;
}

.quiz-result {
  margin-top: 12px;
  padding: 8px;
  font-weight: bold;
  text-align: center;
}

.quiz-score {
  background-color: #e0e0ff;
  border: 2px inset var(--win98-gray);
  padding: 8px;
  margin-top: 8px;
  text-align: center;
}

/* Timeline Styles */
.timeline {
  position: relative;
  padding-left: 30px;
  margin: 16px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(to bottom, #000080, #008080, #008000);
}

.timeline-item {
  position: relative;
  margin-bottom: 16px;
  padding: 8px 12px;
  background-color: #f0f0f0;
  border: 2px solid;
  border-color: var(--win98-border-light) var(--win98-border-dark) var(--win98-border-dark) var(--win98-border-light);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -24px;
  top: 12px;
  width: 12px;
  height: 12px;
  background-color: #ffff00;
  border: 2px solid #808000;
}

.timeline-year {
  font-weight: bold;
  color: #000080;
  font-size: 13px;
}

.timeline-event {
  margin-top: 4px;
  font-size: 11px;
}

/* Glossary Styles */
.glossary-term {
  background-color: #e8e8ff;
  border: 1px solid #000080;
  padding: 8px 12px;
  margin: 8px 0;
  cursor: pointer;
}

.glossary-term:hover {
  background-color: #d0d0ff;
}

.glossary-term-title {
  font-weight: bold;
  color: #000080;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.glossary-term-title::after {
  content: '▼';
  font-size: 8px;
}

.glossary-term.expanded .glossary-term-title::after {
  content: '▲';
}

.glossary-definition {
  display: none;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed #808080;
  font-size: 11px;
}

.glossary-term.expanded .glossary-definition {
  display: block;
}

/* Chatbot Simulator Styles */
.chatbot-container {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
  background-color: #ffffff;
  border: 2px inset var(--win98-gray);
  margin-bottom: 8px;
}

.chat-message {
  margin-bottom: 8px;
  padding: 6px 10px;
  max-width: 80%;
}

.chat-message.user {
  background-color: #cce5ff;
  border: 1px solid #004085;
  margin-left: auto;
  text-align: right;
}

.chat-message.bot {
  background-color: #e8e8e8;
  border: 1px solid #808080;
}

.chat-input-area {
  display: flex;
  gap: 4px;
}

.chat-input {
  flex: 1;
  padding: 4px 8px;
  border: 2px inset var(--win98-gray);
  font-family: inherit;
  font-size: 11px;
}

.chat-send-btn {
  padding: 4px 16px;
}

/* Info Box Styles */
.info-box {
  background-color: #ffffcc;
  border: 2px solid #808000;
  padding: 10px;
  margin: 12px 0;
  display: flex;
  gap: 10px;
}

.info-box-icon {
  font-size: 24px;
}

.info-box-content {
  flex: 1;
}

.info-box-title {
  font-weight: bold;
  color: #806000;
  margin-bottom: 4px;
}

/* Warning Box */
.warning-box {
  background-color: #ffeeee;
  border: 2px solid #cc0000;
  padding: 10px;
  margin: 12px 0;
}

.warning-box-title {
  font-weight: bold;
  color: #cc0000;
  margin-bottom: 4px;
}

/* Tip Box */
.tip-box {
  background-color: #eeffee;
  border: 2px solid #008000;
  padding: 10px;
  margin: 12px 0;
}

.tip-box-title {
  font-weight: bold;
  color: #006000;
  margin-bottom: 4px;
}

/* Progress Bar */
.progress-container {
  background-color: var(--win98-gray);
  border: 2px inset var(--win98-gray);
  height: 20px;
  margin: 8px 0;
}

.progress-bar {
  height: 100%;
  background: repeating-linear-gradient(
    90deg,
    #000080 0px,
    #000080 8px,
    #0000a0 8px,
    #0000a0 16px
  );
}

/* Tab Control */
.tab-control {
  margin: 8px 0;
}

.tab-headers {
  display: flex;
  border-bottom: 2px solid var(--win98-gray);
}

.tab-header {
  padding: 4px 16px;
  background-color: var(--win98-gray);
  border: 2px solid;
  border-color: var(--win98-border-light) var(--win98-border-dark) var(--win98-gray) var(--win98-border-light);
  margin-right: 2px;
  cursor: pointer;
  font-size: 11px;
}

.tab-header.active {
  background-color: var(--win98-white);
  border-bottom-color: var(--win98-white);
  position: relative;
  top: 2px;
}

.tab-content {
  display: none;
  padding: 12px;
  background-color: var(--win98-white);
  border: 2px solid;
  border-color: var(--win98-border-light) var(--win98-border-dark) var(--win98-border-dark) var(--win98-border-light);
  border-top: none;
}

.tab-content.active {
  display: block;
}

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
  margin: 12px 0;
}

.card {
  background-color: var(--win98-white);
  border: 2px solid;
  border-color: var(--win98-border-light) var(--win98-border-dark) var(--win98-border-dark) var(--win98-border-light);
  padding: 12px;
  text-align: center;
}

.card-icon {
  font-size: 32px;
  margin-bottom: 8px;
}

.card-title {
  font-weight: bold;
  color: #000080;
  margin-bottom: 4px;
}

.card-desc {
  font-size: 10px;
  color: #808080;
}

/* Comparison Table */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 11px;
}

.comparison-table th {
  background-color: #000080;
  color: white;
  padding: 8px;
  text-align: left;
}

.comparison-table td {
  padding: 6px 8px;
  border: 1px solid #c0c0c0;
}

.comparison-table tr:nth-child(even) {
  background-color: #f0f0f0;
}

.comparison-table tr:hover {
  background-color: #e0e0ff;
}

/* Emoji indicators */
.status-good::before { content: '✅ '; }
.status-bad::before { content: '❌ '; }
.status-warning::before { content: '⚠️ '; }
.status-info::before { content: 'ℹ️ '; }

/* Welcome Screen */
.welcome-banner {
  background: linear-gradient(135deg, #000080 0%, #008080 50%, #008000 100%);
  color: white;
  padding: 20px;
  text-align: center;
  margin: -8px -8px 16px -8px;
}

.welcome-title {
  font-size: 18px;
  font-weight: bold;
  margin-bottom: 8px;
}

.welcome-subtitle {
  font-size: 12px;
  opacity: 0.9;
}

/* Keyboard shortcut hint */
.shortcut-hint {
  display: inline-block;
  background-color: #e0e0e0;
  border: 1px solid #808080;
  padding: 2px 6px;
  font-family: monospace;
  font-size: 10px;
  margin: 0 2px;
}