body[data-theme="cyberpunk"] {
  --bg: #040508;
  --panel: #0d111a;
  --accent: #10fccd;
  --accent-glow: rgba(3, 229, 184, 0.4);
  --magenta: #e60977;
  --text: #d0d6dc;
  --text-dim: #56667b;
  --border: rgba(16, 246, 200, 0.25);
  --tab-active: rgba(7, 145, 117, 0.248);
}

body[data-theme="matrix"] {
  --bg: #030a04;
  --panel: #051408;
  --accent: #10fe4b;
  --accent-glow: rgba(7, 247, 67, 0.4);
  --magenta: #38f864;
  --text: #b2e3b7;
  --text-dim: #2d6a4f;
  --border: rgba(9, 251, 70, 0.3);
  --tab-active: rgba(0, 255, 65, 0.2);
}

body[data-theme="synthwave"] {
  --bg: #150a21;
  --panel: #1f1035;
  --accent: #f76fc8;
  --accent-glow: rgba(255, 113, 206, 0.4);
  --magenta: #01cdfe;
  --text: #f9f6f7;
  --text-dim: #8e48c8;
  --border: rgba(241, 115, 197, 0.3);
  --tab-active: rgba(236, 106, 190, 0.2);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

body 
{
  background: var(--bg);
  font-family: 'Courier New', Courier, monospace;
  color: var(--text);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: background 0.3s ease;
  background-image: 
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
}

#desktop 
{
  flex: 1;
  position: relative;
  padding: 24px;
  display: grid;
  grid-template-columns: repeat(auto-fill, 90px);
  grid-auto-rows: 95px;
  gap: 16px;
}

.desktop-icon 
{
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}

.desktop-icon:hover 
{
  background: rgba(239, 239, 239, 0.05);
  border-color: var(--border);
  box-shadow: 0 0 10px var(--accent-glow);
}

.desktop-icon .icon { font-size: 28px; }
.desktop-icon span 
{
  font-size: 11px;
  text-align: center;
  color: var(--accent);
  font-weight: bold;
}

.window 
{
  position: absolute;
  width: 460px;
  min-height: 290px;
  background: var(--panel);
  border: 1px solid var(--accent);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7), 0 0 15px var(--accent-glow);
  display: flex;
  flex-direction: column;
  z-index: 10;
}

.window.minimized 
{
  display: none !important;
}

.window.maximized 
{
  top: 0 !important;
  left: 0 !important;
  width: 100vw !important;
  height: calc(100vh - 44px) !important;
}

.window-header 
{
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid var(--border);
  padding: 8px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: move;
}

.window-title 
{
  font-size: 12px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: bold;
}

.window-controls button 
{
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 13px;
  cursor: pointer;
  margin-left: 8px;
}

.window-controls button:hover 
{
  color: var(--accent);
}

.window-body 
{
  flex: 1;
  padding: 14px;
  overflow-y: auto;
  font-size: 13px;
  line-height: 1.4;
  user-select: text;
}

.calc-container 
{
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.calc-display 
{
  width: 100%;
  height: 40px;
  background: rgba(4, 4, 4, 0.5);
  border: 1px solid var(--border);
  color: var(--accent);
  font-family: inherit;
  font-size: 20px;
  text-align: right;
  padding: 8px 12px;
  outline: none;
}

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

.calc-grid button 
{
  background: rgb(26, 25, 25);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: inherit;
  padding: 14px;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.1s ease;
}

.calc-grid button:hover 
{
  background: rgba(240, 240, 240, 0.1);
  border-color: var(--accent);
  color: var(--accent);
}

.calc-grid button.op 
{
  color: var(--magenta);
}

.calc-grid button.equals 
{
  background: var(--accent);
  color: #000;
  font-weight: bold;
}

#matrixCanvas 
{
  width: 100%;
  height: 100%;
  background: #090909;
  display: block;
}

textarea.pad 
{
  width: 100%;
  height: 200px;
  background: transparent;
  border: none;
  color: var(--text);
  font-family: inherit;
  resize: none;
  outline: none;
}

.terminal-logs 
{
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 8px;
}

.terminal-input-row 
{
  display: flex;
  gap: 8px;
  align-items: center;
}

.terminal-input 
{
  background: transparent;
  border: none;
  outline: none;
  color: var(--accent);
  font-family: inherit;
  flex: 1;
}

.file-list
 {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.file-item 
{
  display: flex;
  justify-content: space-between;
  padding: 6px 8px;
  background: rgba(247, 244, 244, 0.02);
  border: 1px solid var(--border);
  cursor: pointer;
}

.file-item:hover 
{
  background: rgba(245, 243, 243, 0.08);
}

.theme-btn-grid 
{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 10px;
}

.theme-btn 
{
  padding: 10px;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: inherit;
  font-weight: bold;
  cursor: pointer;
}

.theme-btn:hover 
{
  background: var(--accent);
  color: var(--bg);
}

#taskbar
 {
  height: 44px;
  background: rgba(10, 10, 16, 0.95);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.taskbar-left 
{
  display: flex;
  align-items: center;
  gap: 12px;
}

.start-btn 
{
  background: var(--accent);
  color: #000;
  border: none;
  padding: 6px 14px;
  font-weight: 900;
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
}

#taskbar-tabs 
{
  display: flex;
  gap: 6px;
}

.task-tab 
{
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 4px 10px;
  font-size: 11px;
  font-family: inherit;
  cursor: pointer;
}

.task-tab.active 
{
  background: var(--tab-active);
  border-color: var(--accent);
  color: var(--accent);
}

#start-menu 
{
  position: absolute;
  bottom: 44px;
  left: 16px;
  width: 220px;
  background: var(--panel);
  border: 1px solid var(--accent);
  box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.5);
  z-index: 200;
  display: flex;
  flex-direction: column;
}

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

.start-header 
{
  padding: 10px;
  font-size: 11px;
  border-bottom: 1px solid var(--border);
  color: var(--accent);
  font-weight: bold;
}

.start-items button 
{
  width: 100%;
  text-align: left;
  padding: 8px 12px;
  background: transparent;
  border: none;
  color: var(--text);
  font-family: inherit;
  cursor: pointer;
}

.start-items button:hover 
{
  background: rgba(245, 243, 243, 0.08);
  color: var(--accent);
}

.clock 
{
  font-size: 12px;
  color: var(--accent);
  font-weight: bold;
}