:root {
  --bg: #0d1117;
  --bg-panel: #161b22;
  --bg-input: #0d1117;
  --border: #30363d;
  --border-soft: #21262d;
  --text: #c9d1d9;
  --text-dim: #8b949e;
  --green: #3fb950;
  --green-bright: #56d364;
  --accent: #58a6ff;
  --amber: #d29922;
  --red: #f85149;
  --mono: "SFMono-Regular", "JetBrains Mono", "Fira Code", Consolas, "Liberation Mono", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

/* ---------- Header ---------- */
.site-header {
  max-width: 1120px;
  margin: 0 auto;
  padding: 48px 20px 24px;
}
.site-header h1 {
  font-family: var(--mono);
  font-size: 2.4rem;
  margin: 0;
  letter-spacing: -0.5px;
}
.site-header .prompt { color: var(--green); margin-right: 6px; }
.site-header .accent { color: var(--accent); }
.tagline {
  color: var(--text-dim);
  font-size: 1.05rem;
  margin: 8px 0 0;
}
.tagline abbr { color: var(--text); text-decoration: none; border-bottom: 1px dotted var(--text-dim); }

/* ---------- Output ---------- */
.output-panel { margin-top: 8px; }
.output-bar {
  display: flex;
  align-items: stretch;
  gap: 0;
  border: 1px solid var(--green);
  border-radius: 10px;
  background: #02160a;
  overflow: hidden;
  box-shadow: 0 0 0 1px rgba(63,185,80,0.15), 0 8px 30px rgba(0,0,0,0.4);
}
.command {
  flex: 1;
  font-family: var(--mono);
  font-size: 1.15rem;
  color: var(--green-bright);
  padding: 18px 20px;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 1.4em;
}
.command .tok { transition: background .15s; border-radius: 3px; }
.command .tok-cmd { color: var(--text-dim); }
.command .tok-action { color: var(--accent); font-weight: 600; }
.command .tok-keyword { color: var(--text-dim); }
.command .tok-value { color: var(--green-bright); }
.command .tok-comment { color: var(--amber); }
.command .tok.hl { background: rgba(88,166,255,0.18); }

.command .tok.editable {
  cursor: text;
  border-bottom: 1px dashed rgba(86,211,100,0.5);
  padding: 0 1px;
  border-radius: 2px;
  outline: none;
}
.command .tok.editable:hover { background: rgba(86,211,100,0.10); }
.command .tok.editable:focus {
  background: rgba(86,211,100,0.15);
  border-bottom-color: var(--green-bright);
  box-shadow: 0 0 0 1px rgba(86,211,100,0.4);
}
.command .tok.invalid-tok {
  color: var(--red);
  border-bottom: 1px dashed var(--red);
  background: rgba(248,81,73,0.12);
}

/* inline dropdowns inside the command */
.command .tok-select {
  font-family: var(--mono);
  font-size: 1em;
  background: rgba(88,166,255,0.10);
  border: none;
  border-bottom: 1px dashed rgba(88,166,255,0.6);
  border-radius: 3px;
  padding: 0;
  margin: 0;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}
.command .tok-select.tok-action { color: var(--accent); font-weight: 600; }
.command .tok-select.tok-value { color: var(--green-bright); }
.command .tok-select:hover { background-color: rgba(88,166,255,0.18); }
.command .tok-select:focus {
  outline: none;
  box-shadow: 0 0 0 1px rgba(88,166,255,0.5);
}
.command .tok-select option { background: var(--bg-panel); color: var(--text); }

.copy-btn {
  flex: 0 0 auto;
  border: none;
  border-left: 1px solid var(--green);
  background: #0a2a14;
  color: var(--green-bright);
  font-family: var(--mono);
  font-size: 0.95rem;
  padding: 0 22px;
  cursor: pointer;
  transition: background .15s;
}
.copy-btn:hover { background: #0f3d1d; }
.copy-btn.copied { background: var(--green); color: #02160a; font-weight: 600; }
.copy-btn.disabled,
.copy-btn:disabled {
  background: #1a1f25;
  color: var(--text-dim);
  cursor: not-allowed;
  opacity: 0.6;
}

.hint {
  margin: 10px 2px 0;
  font-size: 0.9rem;
  color: var(--amber);
  min-height: 1.1em;
}
.hint:empty { display: none; }

.edit-tip {
  margin: 8px 2px 0;
  font-size: 0.82rem;
  color: var(--text-dim);
}
.edit-tip .ul { border-bottom: 1px dashed rgba(86,211,100,0.6); color: var(--green-bright); }

/* ---------- Explanation ---------- */
.section-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-dim);
  margin: 40px 0 14px;
  font-weight: 600;
}
.explain-panel { margin-top: 8px; }
.breakdown { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.breakdown li {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 10px 14px;
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
}
.breakdown .b-token {
  font-family: var(--mono);
  color: var(--green-bright);
  font-size: 0.95rem;
  word-break: break-word;
}
.breakdown .b-desc { color: var(--text-dim); font-size: 0.95rem; }
.breakdown .b-empty { color: var(--text-dim); font-style: italic; }

/* ---------- Builder ---------- */
.field-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.field { display: flex; flex-direction: column; }
.field-wide { grid-column: 1 / -1; }
.field-spacer { display: none; }
.field label {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}
.field .opt {
  font-weight: 400;
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-left: 4px;
}
.field input,
.field select {
  font-family: var(--mono);
  font-size: 0.98rem;
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 10px 12px;
  width: 100%;
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(88,166,255,0.15);
}
.field input.invalid {
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(248,81,73,0.15);
}
.field-help {
  margin-top: 6px;
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.4;
}
.field-help code {
  font-family: var(--mono);
  background: var(--border-soft);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 0.95em;
}

.builder-actions { margin-top: 22px; }
.reset-btn {
  font-family: var(--mono);
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 9px 18px;
  cursor: pointer;
  transition: border-color .15s, color .15s;
}
.reset-btn:hover { color: var(--text); border-color: var(--text-dim); }

/* ---------- Cheatsheet ---------- */
.cheat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.cheat-grid h3 {
  font-size: 0.95rem;
  margin: 0 0 10px;
  color: var(--accent);
}
.cheat-grid ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 7px; }
.cheat-grid li { font-size: 0.9rem; color: var(--text-dim); }
.cheat-grid code {
  font-family: var(--mono);
  color: var(--green-bright);
  background: var(--bg-panel);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 0.92em;
}

/* ---------- Footer ---------- */
.site-footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  border-top: 1px solid var(--border-soft);
}
.site-footer p { color: var(--text-dim); font-size: 0.85rem; margin: 0; }
.footer-link { margin-top: 10px !important; }
.footer-link a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .15s;
}
.footer-link a:hover { border-bottom-color: var(--accent); }

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .field-grid { grid-template-columns: 1fr; }
  .cheat-grid { grid-template-columns: 1fr; }
  .breakdown li { grid-template-columns: 1fr; gap: 2px; }
  .site-header h1 { font-size: 1.9rem; }
  .command { font-size: 1rem; }
  .output-bar { flex-direction: column; }
  .copy-btn { border-left: none; border-top: 1px solid var(--green); padding: 12px; }
}