* { box-sizing: border-box; }

body {
  font-family: Arial, sans-serif;
  background: #0f1320; /* darker overall background for contrast */
  color: #eaf0ff;
  padding: 20px;
  margin: 0;
}


/* -------- TITLE + TEXT + BUTTON ROW -------- */
.header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  min-width: 500px;
  gap: 20px;
}

h1 {
  margin: 0;
  color: #e5e9f0;
}

.title {
  white-space: nowrap;
}

.subtitle {
  flex: 1;          /* fills all space between title and buttons */
  text-align: center;
  color: #cfd6e3;
  margin: 0;
  font-size: 16px;
  min-width: 240px;
}

/* Button group */
.button-group {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
}

button {
  padding: 12px 16px;
  font-size: 14px;
  cursor: pointer;
  border-radius: 8px;
  border: 1px solid #0fb3ff;
  background: linear-gradient(180deg, #0fb3ff, #0a86c3);
  color: #fff;
  box-shadow: 0 6px 18px rgba(10,134,195,0.45);
}

button:hover {
  background: linear-gradient(180deg, #25c7ff, #0b93d4);
}


/* GitHub button */
.githubBtn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  border-radius: 8px;
  border: 1px solid #0fb3ff;
  background: #131a2d;
  color: #0fb3ff;
  text-decoration: none;
  box-shadow: 0 6px 18px rgba(10,134,195,0.3);
  transition: 0.2s ease;
}

.github-btn:hover {
  background: #0fb3ff;
  color: #ffffff;
}


/* -------- EDITOR CONTAINER -------- */
.editor-container {
  display: flex;
  background: #1a2033;
  border-radius: 10px;
  font-size: 16px;
  line-height: 1.6;
  font-family: monospace;
  height: calc(100vh - 100px);  /* Nearly full height, leaves space for button */
  min-height: 200px;
  min-width: 500px;
  overflow: hidden;
  border: 1px solid #2a3350;
  box-shadow: 0 8px 28px rgba(0,0,0,0.45);
}

.line-numbers {
  background: #222a44;
  color: #cfd6e3;
  padding: 16px 12px;
  text-align: right;
  white-space: pre;
  user-select: none;
  overflow: hidden;
  min-width: 44px;
  border-right: 1px solid #2f395f;
}

.editor-wrapper {
  position: relative;
  flex: 1;
  height: 100%;
}

.highlight-layer {
  position: absolute;
  inset: 0;
  padding: 16px;
  margin: 0;
  font-family: monospace;
  font-size: 16px;
  line-height: 1.6;
  color: #eaf0ff;
  pointer-events: none;
  overflow: hidden;      /* do NOT scroll internally */
  background: transparent;
  white-space: pre; /* preserves spaces & newlines */
  word-wrap: break-word; /* allows soft wrapping */
  min-height: 100%;
}

textarea {
  position: relative;
  z-index: 1;  /* ensure scrollbars appear on top */
  font-family: monospace;
  font-size: 16px;
  line-height: 1.6;
  padding: 16px;
  margin: 0;
  border: none;
  box-sizing: border-box;
  white-space: pre;   /* must match highlight layer */
  word-wrap: break-word;   /* must match highlight layer */
  background: transparent;
  color: transparent;
  caret-color: #eaf0ff;
  resize: none;
  outline: none;
  width: 100%;
  height: 100%;
  overflow: auto;
}


/* ===== Highlight colors ===== */
.keyword   { color: #ffb300; font-weight: 800; }  /* stronger orange */
.variable  { color: #f24495; font-weight: 700; }  /* stronger pink */
.param     { color: #00e5ff; font-weight: 700; }  /* cyan for undefined identifiers */
.value     { color: #19a94d; font-weight: 700; }  /* stronger green */
.function  { color: #3881ff; font-weight: 800; }  /* slightly darker blue than cyan */
.comment   { color: #cfd3dd; font-style: italic; }/* uniform light grey + italic */