:root{
  --bg-light:#f9fafb; --panel-light:#ffffff; --muted-light:#4b5563; --accent-light:#7c3aed; --glass-light: rgba(0,0,0,0.04);
  --bg-dark:#0f1724; --panel-dark:#0b1220; --muted-dark:#94a3b8; --accent-dark:#7c3aed; --glass-dark: rgba(255,255,255,0.04);
}

[data-theme="dark"] {
  --bg: var(--bg-dark);
  --panel: var(--panel-dark);
  --muted: var(--muted-dark);
  --accent: var(--accent-dark);
  --glass: var(--glass-dark);
  --text: #e6eef8;

  /* Table variables for dark mode */
  --border-color: #555;
  --table-header-bg: #131a26;
  --table-row-alt: #1d2638;
}

[data-theme="light"] {
  --bg: var(--bg-light);
  --panel: var(--panel-light);
  --muted: var(--muted-light);
  --accent: var(--accent-light);
  --glass: var(--glass-light);
  --text: #111827;

  /* Table variables for light mode */
  --border-color: #999;
  --table-header-bg: #f2f2f2;
  --table-row-alt: #fafafa;
}

*{box-sizing:border-box}
html,body{height:100%;margin:0;font-family:Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial; background:var(--bg); color:var(--text)}
header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 20px;border-bottom:1px solid rgba(0,0,0,0.06)}
header h1{font-size:16px;margin:0;font-weight:600}
header p{margin:0;color:var(--muted);font-size:13px}

.hidden { display: none !important; }

.wrap{display:grid;grid-template-columns:1fr 1fr;gap:18px;padding:18px;height:calc(100% - 72px)}
.wrap.preview-only { grid-template-columns: 1fr; }
.panel{background:var(--panel);border-radius:12px;padding:12px;display:flex;flex-direction:column;min-height:0;box-shadow:0 6px 18px rgba(2,6,23,0.1)}
.controls{display:flex;gap:8px;margin-bottom:8px;flex-wrap:wrap}
.btn{background:var(--glass);border:1px solid rgba(0,0,0,0.05);padding:8px 10px;border-radius:8px;color:var(--muted);font-size:13px;cursor:pointer}
.btn:hover{color:var(--text)}
.btn.small{padding:6px 8px;font-size:12px}

textarea#md{flex:1;background:transparent;border:1px dashed rgba(0,0,0,0.08);outline:none;color:inherit;padding:12px;border-radius:8px;resize:none;font-family:ui-monospace, SFMono-Regular, Menlo, Monaco, "Roboto Mono", "Courier New", monospace;font-size:14px}

.preview{flex:1;overflow:auto;padding:14px;border-radius:8px;background:linear-gradient(180deg, rgba(0,0,0,0.02), transparent)}
.meta{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.meta .hint{color:var(--muted);font-size:13px}

/* Rendered markdown styling */
.preview h1{font-size:24px;margin:8px 0}
.preview h2{font-size:20px;margin:8px 0}
.preview h3{font-size:17px;margin:8px 0}
.preview p{line-height:1.6;color:var(--text)}
.preview a{color:var(--accent);text-decoration:underline}
.preview pre{background:rgba(0,0,0,0.08);padding:12px;border-radius:8px;overflow:auto}
.preview code{background:rgba(0,0,0,0.05);padding:2px 6px;border-radius:6px;font-family:ui-monospace, SFMono-Regular, Menlo, Monaco, "Roboto Mono"}
.preview blockquote{border-left:3px solid rgba(0,0,0,0.1);padding-left:10px;color:var(--muted);margin:8px 0}
.preview ul, .preview ol{margin:8px 0 8px 20px}
.preview img{max-width:100%;border-radius:8px}

table {
  border-collapse: collapse;
  width: fit-content;
  margin: 1em 0;
  font-size: 0.95em;
}

th, td {
  border: 0.5px solid var(--border-color);
  padding: 6px 10px;
  text-align: left;
}

thead {
  background-color: var(--table-header-bg);
}

tr:nth-child(even) td {
  background-color: var(--table-row-alt);
}

footer{padding:12px 20px;color:var(--muted);font-size:13px;border-top:1px solid rgba(0,0,0,0.06)}

@media (max-width:900px){
  .wrap{grid-template-columns:1fr;grid-auto-rows:1fr}
  header{padding:12px}
  .wrap{padding:12px;height:calc(100% - 96px)}
  .header-text p { display:none; }
}