:root {
  --bg: #fbfbfa;
  --surface: #ffffff;
  --border: #e3e2df;
  --text: #1d1c1a;
  --muted: #6b6963;
  --accent: #2f6f4f;
  --accent-soft: #eaf3ee;
  --danger: #9b2c2c;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16171a;
    --surface: #1d1f23;
    --border: #32353b;
    --text: #e8e8e6;
    --muted: #9a9a95;
    --accent: #6fc79a;
    --accent-soft: #1f2f27;
    --danger: #f0a0a0;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 2rem 1.25rem 4rem;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.5;
}

.topbar { max-width: 1000px; margin: 0 auto 1.75rem; }
.topbar h1 { margin: 0; font-size: 1.35rem; font-family: var(--mono); letter-spacing: -0.02em; }
.tagline { margin: 0.35rem 0 0; color: var(--muted); font-size: 0.9rem; }
.tagline code { font-family: var(--mono); font-size: 0.85em; }

main { max-width: 1000px; margin: 0 auto; }

/* ---- drop zone ---- */
.drop {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  min-height: 190px;
  padding: 2rem;
  border: 1.5px dashed var(--border);
  border-radius: 12px;
  background: var(--surface);
  cursor: pointer;
  text-align: center;
  transition: border-color 0.15s, background 0.15s;
}
.drop:hover, .drop:focus-within { border-color: var(--accent); }
.drop.is-over { border-color: var(--accent); background: var(--accent-soft); }
.drop.is-busy { opacity: 0.6; pointer-events: none; }
.drop-icon { width: 30px; height: 30px; color: var(--muted); margin-bottom: 0.4rem; }
.drop.is-over .drop-icon { color: var(--accent); }
.drop-title { font-weight: 600; font-size: 0.98rem; }
.drop-sub { color: var(--muted); font-size: 0.85rem; }

/* ---- status ---- */
.status { min-height: 1.5rem; margin: 0.9rem 0 0; font-size: 0.875rem; color: var(--muted); }
.status.is-error { color: var(--danger); font-family: var(--mono); font-size: 0.82rem; white-space: pre-wrap; }

/* ---- results ---- */
.results { margin-top: 0.6rem; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); overflow: hidden; }

.tabs { display: flex; align-items: center; gap: 0.15rem; padding: 0.45rem 0.6rem; border-bottom: 1px solid var(--border); flex-wrap: wrap; }

.tab {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.875rem;
  padding: 0.35rem 0.7rem;
  border-radius: 7px;
  cursor: pointer;
}
.tab:hover { color: var(--text); background: var(--accent-soft); }
.tab.is-active { color: var(--text); background: var(--accent-soft); font-weight: 600; }

.tab-actions { margin-left: auto; display: flex; align-items: center; gap: 0.4rem; }
.meta { color: var(--muted); font-size: 0.78rem; font-family: var(--mono); margin-right: 0.3rem; }

/* Rendered / Source switch, shown only on the Markdown tab */
.segmented { display: inline-flex; border: 1px solid var(--border); border-radius: 7px; overflow: hidden; margin-right: 0.3rem; }
.segmented[hidden] { display: none; }
.seg {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.76rem;
  padding: 0.26rem 0.6rem;
  cursor: pointer;
}
.seg + .seg { border-left: 1px solid var(--border); }
.seg:hover { color: var(--text); }
.seg.is-active { background: var(--accent-soft); color: var(--text); font-weight: 600; }

.preview { display: block; width: 100%; height: 62vh; border: 0; background: var(--surface); }
.preview[hidden] { display: none; }

.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 0.8rem;
  padding: 0.28rem 0.65rem;
  border-radius: 7px;
  cursor: pointer;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }

.notice {
  padding: 0.5rem 0.9rem;
  background: var(--accent-soft);
  color: var(--muted);
  font-size: 0.8rem;
  border-bottom: 1px solid var(--border);
}

.output {
  margin: 0;
  padding: 1rem 1.1rem;
  max-height: 62vh;
  overflow: auto;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  tab-size: 2;
}
.output:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

/* JSON syntax highlighting */
.tok-key { color: var(--accent); }
.tok-str { color: #b06a2e; }
.tok-num { color: #1f6fb5; }
.tok-lit { color: #8a52b5; }
@media (prefers-color-scheme: dark) {
  .tok-str { color: #e0a76a; }
  .tok-num { color: #7fb8ea; }
  .tok-lit { color: #c79ae6; }
}