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

/* Container vertical */
.container { display: flex; flex-direction: column; height: 100vh; }

/* Header */
header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px; background: #007bff; color: #fff;
}
header .logo { font-size: 1.5em; }
header .search-profile input { padding: 5px; width: 180px; }
header .search-profile button { margin-left: 5px; padding: 5px 10px; }

/* Main horizontal */
main { display: flex; flex: 1; }

/* Sidebar */
.sidebar {
  width: 30%; background: #f1f1f1; border-right: 1px solid #ccc; padding: 10px;
  overflow-y: auto;
}
.section-header {
  display: block; padding: 10px; background: #ddd; color: #333;
  text-decoration: none; cursor: pointer; border-radius: 4px; margin-bottom: 5px;
}
.section-header.active { background: #ccc; font-weight: bold; }
.section-list { list-style: none; margin-bottom: 15px; display: none; }
.section-list li a {
  display: block; padding: 8px; text-decoration: none; color: #007bff; border-radius: 3px;
}
.section-list li a:hover { background: #e0e0e0; }

/* Workspace */
.workspace { width: 70%; padding: 20px; position: relative; }

/* Grid classes */
.grid-2x2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
  margin-bottom: 20px;
}
.grid-3x1 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
  margin-bottom: 20px;
}

/* Buttons */
.big-btn {
  padding: 20px; font-size: 1.1em; background: #007bff; color: #fff;
  border: none; border-radius: 6px; cursor: pointer;
}
.big-btn:hover { background: #0056b3; }
.big-btn.disabled { background: #aaa; cursor: default; }

/* Content area */
#content-area {
  padding: 20px; background: #fff; border: 1px solid #ccc; border-radius: 6px;
}