:root {
  color-scheme: light;
  --bg-start: #f5fbf6;
  --bg-end: #d7efe0;
  --panel: rgba(255, 255, 255, 0.78);
  --line: rgba(18, 60, 43, 0.12);
  --text: #10281f;
  --muted: #466255;
  --accent: #0f766e;
  --accent-strong: #115e59;
  --danger: #b91c1c;
  --success: #166534;
  --shadow: 0 22px 60px rgba(20, 77, 58, 0.12);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg-start: #071610;
  --bg-end: #163126;
  --panel: rgba(15, 30, 24, 0.82);
  --line: rgba(255, 255, 255, 0.12);
  --text: #eefbf4;
  --muted: #bad9ca;
  --accent: #2dd4bf;
  --accent-strong: #0f766e;
  --danger: #f87171;
  --success: #4ade80;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }

body {
  font-family: "Outfit", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(20, 184, 166, 0.18), transparent 28%),
    radial-gradient(circle at left center, rgba(34, 197, 94, 0.16), transparent 24%),
    linear-gradient(180deg, var(--bg-start), var(--bg-end));
}

.shell { width: min(1380px, calc(100% - 2rem)); margin: 0 auto; padding: 1.2rem 0 2rem; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 28px; box-shadow: var(--shadow); backdrop-filter: blur(18px); }
.hero, .toolbox { padding: 1.4rem; }
.hero { display: grid; grid-template-columns: minmax(0, 2fr) minmax(220px, 1fr); gap: 1rem; align-items: start; }
.eyebrow { margin: 0 0 0.75rem; color: var(--accent); text-transform: uppercase; letter-spacing: 0.18em; font-size: 0.78rem; }
.hero h1 { margin: 0; max-width: 12ch; font-size: clamp(2.4rem, 7vw, 5rem); line-height: 0.95; }
.lede { margin: 1rem 0 0; max-width: 58ch; color: var(--muted); line-height: 1.7; }
.hero-notes, .button-row, .tool-row { display: flex; gap: 0.85rem; }
.hero-notes { justify-content: flex-end; flex-wrap: wrap; align-content: flex-start; }
.pill { display: inline-flex; align-items: center; padding: 0.72rem 0.95rem; border-radius: 999px; background: rgba(255, 255, 255, 0.55); border: 1px solid rgba(18, 60, 43, 0.1); }
.workspace { margin-top: 1.25rem; }
.tool-row { justify-content: space-between; align-items: end; margin-bottom: 1rem; flex-wrap: wrap; }
.tool-row.second { align-items: center; }
.field, .pane, .toggle { display: flex; flex-direction: column; gap: 0.5rem; }
.field span, .pane-label, .toggle span { color: var(--muted); font-size: 0.92rem; }
.toggle { flex-direction: row; align-items: center; margin-top: 1.7rem; }
select, textarea, .button { font: inherit; }
select, textarea, .output-block { border: 1px solid rgba(18, 60, 43, 0.12); background: rgba(255, 255, 255, 0.7); color: var(--text); }
select { min-width: 150px; padding: 0.8rem 0.9rem; border-radius: 16px; }
.button-row { flex-wrap: wrap; }
.button { padding: 0.85rem 1rem; border-radius: 16px; border: 1px solid rgba(18, 60, 43, 0.12); background: rgba(255, 255, 255, 0.54); color: var(--text); cursor: pointer; }
.button.primary { color: white; border-color: transparent; background: linear-gradient(135deg, var(--accent), var(--accent-strong)); }
.button.ghost { background: rgba(255, 255, 255, 0.28); }
.theme-toggle { white-space: nowrap; }
.panes { display: grid; grid-template-columns: 1fr 1fr; gap: 0.85rem; }
.pane textarea, .output-block { min-height: 480px; width: 100%; margin: 0; padding: 1rem; border-radius: 22px; font-family: "IBM Plex Mono", monospace; font-size: 0.92rem; line-height: 1.6; overflow: auto; }
.pane textarea { resize: vertical; }
.status { margin: 1rem 0 0; min-height: 1.5rem; color: var(--muted); }
.status.is-success { color: var(--success); }
.status.is-error { color: var(--danger); }

:root[data-theme="dark"] .pill,
:root[data-theme="dark"] .button {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
}

:root[data-theme="dark"] .button.ghost {
  background: rgba(255, 255, 255, 0.04);
}

:root[data-theme="dark"] .button.primary {
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  border-color: transparent;
}

:root[data-theme="dark"] select,
:root[data-theme="dark"] textarea,
:root[data-theme="dark"] .output-block {
  background: rgba(7, 18, 14, 0.72);
  border-color: rgba(255, 255, 255, 0.12);
}

@media (max-width: 1080px) {
  .hero, .panes { grid-template-columns: 1fr; }
  .hero-notes { justify-content: flex-start; }
}

@media (max-width: 720px) {
  .shell { width: min(100% - 1rem, 1380px); padding-top: 0.5rem; }
  .hero, .toolbox { padding: 1rem; }
  .pane textarea, .output-block { min-height: 280px; }
}