:root {
  --paper: #f2f5f1;
  --sheet: #ffffff;
  --ink: #16211d;
  --ink-soft: #4b5a54;
  --post: #0e6a47;
  --post-dark: #0a5237;
  --stamp: #c2362b;
  --air-blue: #1f4e9c;
  --rule: #d3dbd5;
  --focus: #1f4e9c;
  --radius: 6px;
  --font: 'Public Sans', -apple-system, 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.6 var(--font);
}

.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

a { color: var(--post); text-underline-offset: 2px; }
a:hover { color: var(--post-dark); }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

/* ---------- header ---------- */
.top {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 20px 0 8px;
}
.brand { font-weight: 700; font-size: 17px; color: var(--ink); text-decoration: none; }
.lang { font-size: 15px; }

h1 {
  font-size: clamp(30px, 5vw, 42px); line-height: 1.12; font-weight: 800;
  letter-spacing: -0.02em; margin: 28px 0 10px; max-width: 18ch;
}
.lede { margin: 0 0 28px; color: var(--ink-soft); max-width: 60ch; }

/* ---------- input ---------- */
.input-label { display: block; font-weight: 600; margin-bottom: 8px; }
textarea {
  width: 100%; min-height: 110px; resize: vertical;
  padding: 14px 16px; border: 1.5px solid var(--rule); border-radius: var(--radius);
  background: var(--sheet); color: var(--ink); font: 400 18px/1.55 var(--font);
}
textarea:focus { border-color: var(--post); outline: none; box-shadow: 0 0 0 3px rgba(14, 106, 71, .18); }

.examples { margin: 10px 0 0; font-size: 15px; color: var(--ink-soft); }
.examples button {
  font: inherit; color: var(--post); background: none; border: 0; padding: 2px 0;
  margin-right: 14px; cursor: pointer; text-decoration: underline; text-underline-offset: 2px;
}

.hint { font-size: 15px; color: var(--ink-soft); margin: 6px 0 0; }

/* ---------- label (the one bold element) ---------- */
.label {
  margin: 28px 0 0; background: var(--sheet); border: 1.5px solid var(--ink);
  border-radius: var(--radius); overflow: hidden;
}
.label::before {
  content: ''; display: block; height: 10px;
  background: repeating-linear-gradient(-45deg,
    var(--stamp) 0 14px, var(--sheet) 14px 21px, var(--air-blue) 21px 35px, var(--sheet) 35px 42px);
}
.label-body { display: grid; grid-template-columns: 1fr; gap: 0; }
.label-side { padding: 18px 20px; }
.label-side + .label-side { border-top: 1.5px dashed var(--rule); }
.side-name { font-size: 14px; font-weight: 600; color: var(--ink-soft); margin: 0 0 6px; }
.label-zh { font-size: 17px; margin: 0; word-break: break-all; }
.label-src { font-size: 17px; margin: 0; overflow-wrap: anywhere; }
.label-en { font-size: 20px; line-height: 1.5; font-weight: 600; margin: 0; white-space: pre-line; }

.label-actions {
  display: flex; flex-wrap: wrap; gap: 10px; padding: 14px 20px 18px;
  border-top: 1.5px solid var(--rule);
}

.btn {
  font: 600 16px/1 var(--font); padding: 12px 18px; border-radius: var(--radius);
  border: 1.5px solid var(--post); cursor: pointer; background: var(--post); color: #fff;
}
.btn:hover { background: var(--post-dark); border-color: var(--post-dark); }
.btn.ghost { background: transparent; color: var(--post); }
.btn.ghost:hover { background: rgba(14, 106, 71, .08); }

.empty { padding: 26px 20px; color: var(--ink-soft); margin: 0; }
.warn { margin: 0; padding: 12px 20px; background: #fdf1ef; color: #8a241c; font-size: 15px; border-top: 1.5px solid var(--rule); }
.note { margin: 0; padding: 12px 20px; background: #f4f6e8; color: #4a5222; font-size: 15px; border-top: 1.5px solid var(--rule); }

/* ---------- tool switch ---------- */
.tools { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 4px 0 0; padding: 0; list-style: none; font-size: 15px; }
.tools a { color: var(--ink-soft); text-decoration: none; padding-bottom: 2px; border-bottom: 2px solid transparent; }
.tools a:hover { color: var(--ink); }
.tools a[aria-current="page"] { color: var(--ink); font-weight: 600; border-bottom-color: var(--post); }

@media (min-width: 680px) {
  .label-body { grid-template-columns: 2fr 3fr; }
  .label-side + .label-side { border-top: 0; border-left: 1.5px dashed var(--rule); }
}

/* ---------- fields ---------- */
.fields { margin: 32px 0 0; }
.fields h2, .content h2 { font-size: 24px; line-height: 1.25; margin: 0 0 6px; letter-spacing: -0.01em; }
.fields > p { margin: 0 0 14px; color: var(--ink-soft); max-width: 60ch; }
.field-row {
  display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 4px 12px;
  padding: 10px 0; border-bottom: 1px solid var(--rule);
}
.field-row dt { font-size: 14px; color: var(--ink-soft); grid-column: 1; }
.field-row dd { margin: 0; font-weight: 600; grid-column: 1; word-break: break-word; min-height: 1.6em; }
.field-row .copy { grid-column: 2; grid-row: 1 / span 2; }
.copy {
  font: 600 14px/1 var(--font); padding: 9px 12px; border-radius: var(--radius);
  border: 1.5px solid var(--rule); background: var(--sheet); color: var(--ink); cursor: pointer;
}
.copy:hover { border-color: var(--post); color: var(--post); }
.copy.done { border-color: var(--post); background: var(--post); color: #fff; }
.copy:disabled { opacity: .35; cursor: default; }

/* ---------- batch ---------- */
.batch { margin: 32px 0 0; }
.batch table { width: 100%; border-collapse: collapse; font-size: 15px; background: var(--sheet); }
.batch th, .batch td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--rule); vertical-align: top; }
.batch th { font-weight: 600; }
.batch .scroll { overflow-x: auto; border: 1.5px solid var(--rule); border-radius: var(--radius); margin: 12px 0; }

/* ---------- article ---------- */
.content { margin: 56px 0 0; padding-top: 32px; border-top: 1.5px solid var(--ink); }
.content section { margin: 0 0 40px; }
.content p, .content li { max-width: 65ch; }
.order {
  display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 14px 0; list-style: none; font-size: 15px;
}
.order li { padding: 6px 10px; border: 1.5px solid var(--rule); border-radius: var(--radius); background: var(--sheet); }
.order.en li:first-child, .order.zh li:last-child { border-color: var(--post); }
.glossary { width: 100%; border-collapse: collapse; font-size: 16px; }
.glossary th, .glossary td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--rule); }
.glossary th { font-weight: 600; }
details { border-bottom: 1px solid var(--rule); padding: 12px 0; }
summary { font-weight: 600; cursor: pointer; }
details p { margin: 8px 0 0; color: var(--ink-soft); }

footer { margin: 48px 0 0; padding: 24px 0 40px; border-top: 1px solid var(--rule); font-size: 15px; color: var(--ink-soft); }
footer a { margin-right: 16px; }

@media (prefers-reduced-motion: no-preference) {
  .label { animation: arrive .28s ease-out; }
  @keyframes arrive { from { transform: translateY(6px); opacity: 0; } to { transform: none; opacity: 1; } }
}