/* Reset & base */
* {
    box-sizing: border-box;
}

body,
html {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: Arial, sans-serif;
    background-color: #ffffff;

    display: flex;
    flex-direction: column;
}



    .objective {
      margin: 10px 0;
      display: flex;
      align-items: center;
    }

    .objective label {
      margin-left: 8px;
      transition: color 0.3s;
    }

    .completed label {
      color: green;
      font-weight: bold;
      text-decoration: line-through;
    }

    input[type="checkbox"] {
      pointer-events: none;  /* make it non-clickable */
    }

/* ===== Header (top bar) ===== */
header {
    background-color: #ffffff;
    /* light gray */
    padding: 16px 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header-inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 16px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

header h1 {
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 0 4px 0;
    color: #1f2937;
    /* gray-800 */
}

header p {
    margin: 0;
    font-size: 0.875rem;
    color: #4b5563;
    /* gray-600 */
}

code, pre {
  font-family: Consolas, Menlo, Monaco, "Courier New", monospace;
  background-color: inherit;
  color: blue;
  border: none;
  padding: 0;
  margin: 0;
}


.button-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

button {
    cursor: pointer;
    border: none;
    border-radius: 6px;
    padding: 8px 16px;
    font-weight: 600;
    color: white;
    box-shadow: 0 2px 4px rgb(0 0 0 / 0.1);
    transition: background-color 0.3s ease;
}

#compile-button {
    background-color: #2563eb;
    /* blue-600 */
}

#compile-button:hover {
    background-color: #1d4ed8;
    /* blue-700 */
}

#pause-button {
    background-color: #eab308;
    /* yellow-500 */
    color: #000;
}

#pause-button:hover {
    background-color: #ca8a04;
    /* yellow-600 */
    color: #000;
}

#reset-button {
    background-color: #dc2626;
    /* red-600 */
}

#reset-button:hover {
    background-color: #b91c1c;
    /* red-700 */
}

/* ===== Main Content ===== */
main {
    display: flex;
    justify-content: center;
    padding: 16px;
    background: #f9fafb;
}

.container {
    width: 75vw;
    /* about 12.5% margin on each side */
    max-width: 1200px;
    height: 800px;
    display: flex;
    gap: 20px;
    background: white;
}

.content-width {
  width: 75vw;
  max-width: 1200px;
  margin: 0 auto;
}
.lesson-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
}

#lesson-status {
  font-weight: 600;
  color: green;
  min-width: 120px;
  text-align: center;
  user-select: none;
}

.lesson-nav button {
  padding: 6px 12px;
  font-size: 14px;
  font-weight: 600;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  background-color: #2563eb; /* blue */
  color: white;
  transition: background-color 0.2s ease;
}

.lesson-nav button:hover {
  background-color: #1e40af; /* darker blue */
}
.lesson-nav button:disabled {
  background-color: #ccc;
  color: #666;
  cursor: not-allowed;
  box-shadow: none;
  opacity: 0.6;
}


.dropdown-row {
  display: flex;
  gap: 20px;
  padding: 12px 0;
}

.dropdown-group {
  flex: 1; /* Equal horizontal space */
  display: flex;
  flex-direction: column;
}

.dropdown-title {
  font-weight: 600;
  margin-bottom: 4px;
  font-size: 14px;
  color: #333;
}

.dropdown-group select {
  width: 100%;
  padding: 4px 8px;
  font-size: 14px;
  border-radius: 4px;
  border: 1px solid #aaa;
  background-color: white;
  color: #333;
}



#lesson-box {
  background: white;
  border: 1px solid #ffffff;
  border-top: none;
  border-radius: 0 0 8px 8px;
  padding-top: 0; /* prevents double padding below tabs */
  margin-top: -1px; /* overlap the active tab */
}




/* Monaco editor - left half */
#monaco-editor {
    flex: 1;
    border: 1px solid #d1d5db;
    /* gray-300 */
    height: 100%;
}

/* Right side: canvas + console */
.right-side {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
    height: 100%;
}

/* Canvas - top 2/3 */
#gameCanvas {
    flex: 2;
    border: 1px solid black;
    width: 100%;
    background: white;
}

#button-bar {
    display: flex;
    justify-content: space-between;
    padding: 8px;
    background: #f5f5f5;
}

#button-bar .left-buttons,
#button-bar .right-buttons {
    display: flex;
    gap: 8px;
}

#button-bar button {
    padding: 6px 12px;
    font-size: 14px;
}

.container,
.right-side,
#console,
#console > div {
  min-width: 0;
}
#console {
  flex: 1;
  overflow-y: auto;
  white-space: pre-wrap;
  overflow-wrap: break-word;
  word-wrap: break-word;
  border: 1px solid #d1d5db;
  background: black;
  color: white;
  font-family: monospace;
  padding: 8px;
  box-sizing: border-box;
}

#console > div {
  max-width: 100%;
  box-sizing: border-box;
  overflow-wrap: break-word;
  word-wrap: break-word;
  white-space: pre-wrap;
}

/* alternate line colors */
#console>div:nth-child(odd) {
    background-color: #222;
}

#console>div:nth-child(even) {
    background-color: #111;
}

/* Responsive for smaller screens */
@media (max-width: 900px) {
    .container {
        flex-direction: column;
        width: 95vw;
        height: auto;
    }

    #monaco-editor,
    .right-side {
        height: 400px;
    }
}

#lesson-box {
  background: #ffffff;
  padding: 8px 16px;
  border-bottom: 1px solid #ddd;
  font-family: sans-serif;
  width: 100%;
  box-sizing: border-box;
  flex-shrink: 0; /* Prevent flex containers from stretching it */
  flex-grow: 0;
  overflow: hidden;
}


.lesson-inner {
    max-width: 960px;
    margin: 0 auto;
    color: #333;
}

#lesson-box p {
  margin: 0;
  line-height: 1.4;
}


/* #lesson-box code {
    background: #eee;
    padding: 2px 4px;
    border-radius: 4px;
    font-family: monospace;
} */