/* Simple Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: sans-serif;
}

body {
  background: #222;
  color: #fff;
  height: 100vh;
  overflow: hidden;
}

/* Lock Screen */
#welcome-screen {
  position: absolute;
  width: 100%;
  height: 100%;
  background: #111;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

#enter-btn {
  padding: 10px 20px;
  margin-top: 15px;
  cursor: pointer;
}

/* Desktop */
#desktop {
  width: 100%;
  height: 100%;
  background-color: #2b3e50;
  background-size: cover;
  position: relative;
}

.hidden {
  display: none !important;
}

/* Top Bar */
#top-bar {
  height: 35px;
  background: rgba(0,0,0,0.7);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 15px;
}

/* Icon Grid */
#icon-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  width: 100px;
}

#icon-grid button {
  padding: 10px;
  cursor: pointer;
}

/* Window Styles */
.window {
  position: absolute;
  width: 260px;
  background: #333;
  border: 1px solid #555;
  box-shadow: 2px 2px 10px rgba(0,0,0,0.5);
}

.window-header {
  background: #444;
  padding: 5px 10px;
  cursor: move;
  display: flex;
  justify-content: space-between;
}

.close-btn {
  background: red;
  color: white;
  border: none;
  cursor: pointer;
  padding: 0 5px;
}

.window-content {
  padding: 10px;
}

.notes-area {
  width: 100%;
  height: 100px;
}

/* Calc Grid */
.calc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 5px;
  margin-top: 5px;
}

.calc-screen {
  background: #000;
  padding: 5px;
  text-align: right;
}

/* Light Theme */
body.light-theme #desktop {
  background-color: #e0e0e0;
}