/* Aether Playground — dark theme */

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

:root {
  --bg:        #0d1117;
  --bg2:       #161b22;
  --bg3:       #1c2330;
  --border:    #30363d;
  --text:      #c9d1d9;
  --text-muted:#6e7681;
  --accent:    #58a6ff;
  --accent2:   #3fb950;
  --warn:      #d29922;
  --error:     #f85149;
  --note:      #79c0ff;
  --radius:    6px;
  --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", "Menlo", monospace;
  --font-ui:   -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 14px;
}

/* ── header ──────────────────────────────────────────────────────────────── */

header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 20px;
  height: 52px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.logo {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.5px;
  user-select: none;
}
.logo-ae    { color: var(--accent); }
.logo-ther  { color: var(--text); }

.tagline {
  color: var(--text-muted);
  font-size: 12px;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

button {
  padding: 5px 14px;
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-ui);
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
button:hover  { background: var(--bg2); border-color: var(--accent); }
button:active { background: var(--bg);  }

button.primary {
  background: var(--accent);
  color: #0d1117;
  border-color: var(--accent);
  font-weight: 600;
}
button.primary:hover  { background: #79bcff; }
button.primary:active { background: #388bfd; }

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
}
.toggle input { accent-color: var(--accent); cursor: pointer; }

/* ── main layout ─────────────────────────────────────────────────────────── */

body {
  display: flex;
  flex-direction: column;
}

main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.pane {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.pane-label {
  padding: 6px 14px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.file-hint {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg3);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--accent);
}

.divider {
  width: 1px;
  background: var(--border);
  flex-shrink: 0;
}

/* ── editor ──────────────────────────────────────────────────────────────── */

.editor-pane { flex: 1.1; }

#editor {
  flex: 1;
  width: 100%;
  padding: 14px 16px;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.6;
  border: none;
  outline: none;
  resize: none;
  tab-size: 2;
  overflow-y: auto;
}
#editor::placeholder { color: var(--text-muted); }
#editor:focus { background: #0a0e13; }

/* ── output pane ─────────────────────────────────────────────────────────── */

.output-pane { flex: 0.9; background: var(--bg); }

#output {
  flex: 1;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.65;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* status badge */
.badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 1px 7px;
  border-radius: 99px;
  text-transform: uppercase;
}
.badge.ok      { background: rgba(63,185,80,0.18); color: var(--accent2); }
.badge.error   { background: rgba(248,81,73,0.18);  color: var(--error); }
.badge.warning { background: rgba(210,153,34,0.18); color: var(--warn); }
.badge.running { background: rgba(88,166,255,0.18); color: var(--accent); }

/* output blocks */
.out-stdout {
  color: var(--text);
}
.out-value {
  color: var(--accent2);
}
.out-value::before { content: "→ "; color: var(--text-muted); }

.out-section-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  margin: 10px 0 4px;
}
.out-section-label:first-child { margin-top: 0; }

.diag {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0 8px;
  padding: 3px 0;
}
.diag-loc {
  color: var(--text-muted);
  white-space: nowrap;
  font-size: 12px;
}
.diag-msg { }
.diag.error   .diag-msg { color: var(--error); }
.diag.warning .diag-msg { color: var(--warn); }
.diag.note    .diag-msg { color: var(--note); }

.out-ok     { color: var(--accent2); }
.out-error  { color: var(--error); }
.out-hint   { color: var(--text-muted); font-size: 12px; margin-top: 8px; }

.spinner {
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── footer ──────────────────────────────────────────────────────────────── */

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 20px;
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg2);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
footer code { font-family: var(--font-mono); font-size: 11px; }
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* ── responsive ──────────────────────────────────────────────────────────── */

@media (max-width: 700px) {
  main { flex-direction: column; }
  .divider { width: auto; height: 1px; }
  .editor-pane, .output-pane { flex: none; height: 50%; }
  .tagline { display: none; }
}