/* ── reset ── */

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

/* ── layout ── */

body {
  font-family: "Montserrat", sans-serif;
  background: #0d1117;
  color: #c9d1d9;
  padding: 24px;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 20px;
}

h1 {
  font-size: 1.3rem;
  font-weight: 600;
  color: #e6edf3;
}

.github-link {
  font-size: 0.78rem;
  color: #8b949e;
  text-decoration: none;
  white-space: nowrap;
}

.github-link:hover {
  color: #e6edf3;
}

.github-link svg {
  vertical-align: -3px;
  margin-right: 3px;
}

h1 .subtitle {
  font-weight: 400;
  color: #8b949e;
}

/* ── controls ── */

.controls {
  display: table;
  padding-bottom: 24px;
  align-self: flex-start;
}

.controls > label,
.controls > .btn-cell {
  display: table-cell;
  vertical-align: bottom;
  padding-right: 12px;
  white-space: nowrap;
}

.controls > .btn-cell {
  padding-right: 0;
}

.controls > label {
  font-size: 0.75rem;
  color: #8b949e;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.controls > label > select {
  display: block;
  margin-top: 4px;
}

select,
button {
  font-family: inherit;
  font-size: 0.85rem;
  border-radius: 6px;
  cursor: pointer;
}

select {
  background: #161b22;
  color: #c9d1d9;
  border: 1px solid #30363d;
  padding: 6px 10px;
}

select:focus {
  outline: none;
  border-color: #58a6ff;
}

button {
  font-weight: 600;
  background: #238636;
  color: #fff;
  border: 1px solid #2ea043;
  padding: 6px 20px;
}

button:hover:not(:disabled) {
  background: #2ea043;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ── editor grid ── */

.editor {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto 1fr;
  gap: 14px 24px;
  flex: 1;
  min-height: 0;
}

.pane-header {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #8b949e;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: default;
}

.pane-header select {
  font-size: 0.78rem;
  padding: 4px 8px;
}

/* ── code editor (textarea + highlight overlay) ── */

.code-editor {
  position: relative;
  min-height: 0;
}

.code-editor textarea,
.code-editor pre,
.code-editor code {
  font-family: Consolas, "Courier New", monospace;
  font-size: 13px;
  font-weight: 400;
  font-style: normal;
  line-height: 1.5;
  letter-spacing: 0px;
  word-spacing: 0px;
  tab-size: 2;
  white-space: pre-wrap;
  overflow-wrap: break-word;
  padding: 12px;
  border: 1px solid #30363d;
  border-radius: 6px;
}

.code-editor textarea,
.code-editor pre {
  position: absolute;
  inset: 0;
}

.code-editor textarea {
  background: transparent;
  color: transparent;
  caret-color: #e6edf3;
  resize: none;
  z-index: 1;
}

.code-editor textarea:focus {
  outline: none;
  border-color: #58a6ff;
}

.code-editor pre {
  margin: 0;
  background: #161b22;
  color: #c9d1d9;
  overflow: auto;
  pointer-events: none;
}

.code-editor code {
  padding: 0;
  border: none;
}

/* ── syntax tokens ── */

.hl-comment {
  color: #8b949e;
  font-style: italic;
}
.hl-string {
  color: #a5d6ff;
}
.hl-keyword {
  color: #ff7b72;
}
.hl-type {
  color: #79c0ff;
}
.hl-number {
  color: #d2a8ff;
}
.hl-var {
  color: #ffa657;
}

/* ── footer ── */

.footer-bar {
  display: flex;
  align-items: baseline;
  padding-top: 10px;
}

#status {
  font-size: 0.78rem;
  color: #8b949e;
  flex: 1;
}

#status.error {
  color: #f85149;
}
#status.success {
  color: #3fb950;
}

#version {
  font-size: 0.7rem;
  color: #484f58;
  white-space: nowrap;
}

/* ── responsive ── */

@media (max-width: 720px) {
  body {
    height: auto;
    min-height: 100vh;
  }

  .editor {
    grid-template-columns: 1fr;
    flex: none;
  }

  .editor > :nth-child(1) {
    order: 1;
  }
  .editor > :nth-child(3) {
    order: 2;
  }
  .editor > :nth-child(2) {
    order: 3;
  }
  .editor > :nth-child(4) {
    order: 4;
  }

  .code-editor {
    height: 40vh;
  }

  .header {
    flex-wrap: wrap;
  }

  .github-link {
    width: 100%;
    padding-bottom: 4px;
  }

  .controls,
  .controls > label,
  .controls > .btn-cell {
    display: block;
  }

  .controls > label {
    padding: 0 0 8px 0;
  }

  .controls > .btn-cell {
    padding: 12px 0;
  }
}