:root {
  --bg: #f3efe5;
  --panel: rgba(255, 252, 245, 0.84);
  --panel-strong: rgba(255, 250, 240, 0.94);
  --text: #1d1c1a;
  --muted: #5e584f;
  --line: rgba(55, 46, 32, 0.12);
  --accent: #d97706;
  --accent-strong: #b45309;
  --success: #166534;
  --danger: #b91c1c;
  --neutral: #57534e;
  --shadow: 0 18px 55px rgba(69, 53, 27, 0.12);
}

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

body {
  font-family: "Manrope", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(245, 158, 11, 0.18), transparent 28%),
    radial-gradient(circle at bottom right, rgba(251, 191, 36, 0.22), transparent 30%),
    linear-gradient(180deg, #f8f5ef, #eee4d2 65%, #e8dcc8);
}

.shell { width: min(1440px, 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(16px); }
.hero { display: grid; grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr); gap: 1.5rem; padding: 1.75rem; }
.eyebrow { margin: 0 0 0.75rem; font-size: 0.76rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent); }
.hero h1, .card-header h2 { margin: 0; }
.hero h1 { max-width: 12ch; font-size: clamp(2.4rem, 7vw, 5.3rem); line-height: 0.95; }
.lede { margin: 1rem 0 0; max-width: 58ch; color: var(--muted); line-height: 1.7; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 0.75rem; align-content: flex-start; justify-content: flex-end; }
.pill, .summary-pill { display: inline-flex; align-items: center; justify-content: center; padding: 0.72rem 0.95rem; border-radius: 999px; font-size: 0.92rem; background: rgba(255, 255, 255, 0.55); border: 1px solid rgba(55, 46, 32, 0.1); }
.workspace { margin-top: 1.25rem; }
.controls, .diff-card { padding: 1.2rem; }
.controls-top, .button-row, .summary-row, .diff-toolbar { display: flex; gap: 0.9rem; }
.controls-top, .summary-row { justify-content: space-between; align-items: end; margin-bottom: 1rem; }
.button-row { flex-wrap: wrap; justify-content: flex-end; }
.field, .editor-card { display: flex; flex-direction: column; gap: 0.5rem; }
.field span, .editor-label { font-size: 0.92rem; color: var(--muted); }
select, textarea, .button { font: inherit; }
select, textarea { border: 1px solid rgba(55, 46, 32, 0.12); background: var(--panel-strong); color: var(--text); }
select { min-width: 160px; padding: 0.8rem 0.9rem; border-radius: 16px; }
.editors { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0.9rem; }
textarea, .diff-output { width: 100%; padding: 1rem; border-radius: 20px; font-family: "IBM Plex Mono", monospace; font-size: 0.92rem; line-height: 1.6; }
.editor-card textarea { min-height: 420px; resize: vertical; }
.button { padding: 0.85rem 1rem; border-radius: 16px; border: 1px solid rgba(55, 46, 32, 0.14); background: rgba(255, 255, 255, 0.45); color: var(--text); cursor: pointer; }
.button.primary { color: white; background: linear-gradient(135deg, var(--accent), var(--accent-strong)); border-color: transparent; }
.button.ghost { background: rgba(255, 255, 255, 0.28); }
.view-switch { display: inline-flex; padding: 0.3rem; border-radius: 999px; background: rgba(255, 255, 255, 0.42); border: 1px solid rgba(55, 46, 32, 0.1); }
.view-switch .button { padding: 0.55rem 0.85rem; border: 0; background: transparent; }
.view-switch .button.is-active { background: rgba(217, 119, 6, 0.14); color: var(--accent-strong); }
.status { margin: 1rem 0 0; color: var(--muted); min-height: 1.5rem; }
.status.is-success { color: var(--success); }
.status.is-error { color: var(--danger); }
.diff-card { margin-top: 1.25rem; }
.card-header { margin-bottom: 0.8rem; }
.diff-output { margin: 0; min-height: 220px; overflow: auto; border: 1px solid rgba(55, 46, 32, 0.1); background: rgba(255, 255, 255, 0.48); }
.diff-line { display: grid; grid-template-columns: 84px 1fr; gap: 0.9rem; padding: 0.18rem 0; }
.diff-kind { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.diff-line code { white-space: pre-wrap; word-break: break-word; }
.diff-line.added { background: rgba(34, 197, 94, 0.09); }
.diff-line.removed { background: rgba(239, 68, 68, 0.09); }
.diff-table { display: grid; gap: 0.45rem; min-width: 0; }
.diff-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0.75rem; min-width: 0; }
.diff-row-header { position: sticky; top: 0; z-index: 1; background: rgba(255, 252, 245, 0.92); padding-bottom: 0.25rem; }
.diff-cell-heading { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.diff-cell { min-width: 0; padding: 0.7rem 0.85rem; border-radius: 14px; border: 1px solid rgba(55, 46, 32, 0.08); background: rgba(255, 255, 255, 0.42); }
.diff-cell code { display: block; white-space: pre-wrap; overflow-wrap: anywhere; word-break: break-word; }
.diff-cell.added { background: rgba(34, 197, 94, 0.09); }
.diff-cell.removed { background: rgba(239, 68, 68, 0.09); }
.diff-cell.unchanged { background: rgba(255, 255, 255, 0.3); }
.diff-cell.empty { background: rgba(255, 255, 255, 0.2); }
.summary { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.summary-pill.added { color: var(--success); }
.summary-pill.removed { color: var(--danger); }
.summary-pill.neutral { color: var(--neutral); }
.empty-state { margin: 0; color: var(--muted); }

@media (max-width: 1080px) {
  .hero, .editors { grid-template-columns: 1fr; }
  .hero-meta, .button-row { justify-content: flex-start; }
  .diff-toolbar { width: 100%; flex-direction: column; align-items: flex-start; }
}

@media (max-width: 720px) {
  .shell { width: min(100% - 1rem, 1440px); padding-top: 0.5rem; }
  .hero, .controls, .diff-card { padding: 1rem; }
  .controls-top, .summary-row { align-items: flex-start; flex-direction: column; }
  .editor-card textarea { min-height: 260px; }
  .diff-row { grid-template-columns: 1fr; }
  .diff-row-header { display: none; }
}