:root {
  --bingo-ink: #17352d;
  --bingo-green: #315f4f;
  --bingo-green-dark: #21483c;
  --bingo-mint: #eaf3ec;
  --bingo-cream: #fbf7ea;
  --bingo-gold: #efbf43;
  --bingo-line: #cad9cf;
  --bingo-muted: #65766f;
  --bingo-danger: #b44141;
  --bingo-success: #236a45;
  --bingo-shadow: 0 18px 48px rgba(30, 65, 53, .12);
}

* { box-sizing: border-box; }

body.bingo-page {
  margin: 0;
  color: var(--bingo-ink);
  background:
    radial-gradient(circle at 8% 3%, rgba(239, 191, 67, .16), transparent 22rem),
    linear-gradient(180deg, #f6fbf7 0, #f8f5ea 42rem, #fff 100%);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .55; }

.bingo-wrap { width: min(1480px, calc(100% - 32px)); margin: 0 auto; padding: 34px 0 72px; }

.bingo-hero {
  margin-bottom: 30px;
  padding: 38px clamp(28px, 5vw, 72px);
  color: #fff;
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(255,255,255,.06), transparent 42%), var(--bingo-green);
  box-shadow: var(--bingo-shadow);
}
.bingo-hero-copy { max-width: 830px; }
.back-link { display: inline-flex; margin-bottom: 22px; color: #fff; font-weight: 750; text-decoration: none; }
.back-link:hover { text-decoration: underline; }
.eyebrow { margin: 0 0 7px; font-size: .76rem; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; color: #4f7466; }
.bingo-hero .eyebrow { color: #d9eadf; }
.bingo-hero h1 { margin: 0; font-size: clamp(2.1rem, 4vw, 3.6rem); line-height: 1.02; letter-spacing: -.04em; }
.bingo-hero-copy > p:not(.eyebrow) { max-width: 760px; margin: 18px 0 0; color: #edf6f0; font-size: 1.06rem; line-height: 1.65; }
.hero-points { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 22px; }
.hero-points span { padding: 8px 12px; border: 1px solid rgba(255,255,255,.3); border-radius: 999px; color: #fff; font-size: .84rem; font-weight: 760; }

.bingo-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr); gap: 28px; align-items: start; }

.panel, .preview-panel {
  border: 1px solid rgba(49, 95, 79, .15);
  border-radius: 22px;
  background: rgba(255,255,255,.94);
  box-shadow: 0 12px 34px rgba(31,65,53,.08);
  padding: clamp(20px, 3vw, 30px);
  margin-bottom: 20px;
}
.builder { display: block; }

.panel-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.panel h2, .preview-panel h2 { margin: 0; font-size: clamp(1.2rem, 1.8vw, 1.5rem); letter-spacing: -.02em; color: var(--bingo-green-dark); }
.step-number { display: grid; place-items: center; float: left; width: 30px; height: 30px; margin: 0 11px 8px 0; border-radius: 50%; color: var(--bingo-green-dark); background: var(--bingo-gold); font-weight: 900; font-size: .9rem; }

.ghost-button {
  flex: 0 0 auto;
  border: 1px solid #cfe0d5;
  background: var(--bingo-mint);
  color: var(--bingo-green-dark);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: .86rem;
  font-weight: 700;
}
.ghost-button:hover { background: #dcefe1; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 4px; }
label { display: block; color: #39564c; font-size: .85rem; font-weight: 750; }
input[type="text"], input[type="number"], select, textarea {
  width: 100%;
  margin-top: 7px;
  border: 1px solid #b9cbc0;
  border-radius: 11px;
  background: #fff;
  color: #183b30;
  padding: 10px 12px;
  font-weight: 500;
}
input:focus, select:focus, textarea:focus {
  outline: 0;
  border-color: var(--bingo-gold);
  box-shadow: 0 0 0 3px rgba(239, 191, 67, .28);
}
.checkbox-field { display: flex; align-items: center; gap: 9px; margin-top: 27px; font-weight: 700; }
.checkbox-field input { width: auto; margin-top: 0; }

.terms-textarea { min-height: 190px; line-height: 1.7; font-family: "Microsoft YaHei", "Segoe UI", sans-serif; resize: vertical; }
.field-help { margin: 8px 0 0; color: var(--bingo-muted); font-size: .82rem; }
.term-count { margin: 6px 0 0; color: var(--bingo-green-dark); font-size: .84rem; font-weight: 700; }

.mode-switch { display: flex; flex-wrap: wrap; gap: 14px 22px; }
.mode-switch label {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 42px;
  padding: 9px 12px;
  border: 1px solid var(--bingo-line);
  border-radius: 10px;
  background: #fff;
  font-weight: 700;
  color: #2c463c;
  cursor: pointer;
}
.mode-switch label:has(input:checked) { border-color: var(--bingo-green); background: var(--bingo-mint); }
.mode-switch input { width: auto; margin: 0; }
.openmoji-badge { padding: 2px 6px; border-radius: 999px; background: #f4c342; color: #17352d; font-size: .68rem; font-weight: 850; }
.display-help { margin-top: 11px; line-height: 1.5; }
.openmoji-attribution { margin: 8px 0 0; color: var(--bingo-muted); font-size: .75rem; line-height: 1.45; }
.openmoji-attribution a { color: var(--bingo-green-dark); font-weight: 750; }

.form-footer { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-bottom: 14px; }
.generate-button {
  border: 0;
  border-radius: 999px;
  background: var(--bingo-green);
  color: #fff;
  padding: 13px 22px;
  font-weight: 800;
  box-shadow: 0 5px 0 var(--bingo-green-dark);
}
.generate-button:hover { background: #3a6c5a; }
.generate-button:active { transform: translateY(3px); box-shadow: 0 2px 0 var(--bingo-green-dark); }
.generation-status { margin: 0; color: var(--bingo-muted); font-size: .9rem; }
.generation-status[data-state="success"] { color: var(--bingo-success); }
.generation-status[data-state="error"] { color: var(--bingo-danger); }

.download-row { display: flex; flex-wrap: wrap; gap: 12px; }
.download-button {
  border: 1px solid var(--bingo-green);
  border-radius: 999px;
  background: #fff;
  color: var(--bingo-green-dark);
  padding: 11px 18px;
  font-weight: 750;
}
.download-button:hover:not(:disabled) { background: var(--bingo-mint); }

.preview-panel { position: sticky; top: 20px; max-height: calc(100vh - 40px); overflow: auto; }
.preview-heading p { margin: 4px 0 0; color: var(--bingo-muted); font-size: .86rem; }
.preview-empty { color: var(--bingo-muted); font-size: .9rem; }

.bingo-sheet {
  padding: 16px;
  margin-bottom: 22px;
  border: 1px solid var(--bingo-line);
  border-radius: 14px;
  background: var(--bingo-cream);
}
.bingo-sheet h3 { margin: 0 0 12px; text-align: center; color: var(--bingo-green-dark); font-size: 1.02rem; }
.bingo-card-grid {
  display: grid;
  gap: 4px;
  aspect-ratio: 1 / 1;
}
.bingo-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 4px;
  border: 1px solid var(--bingo-green);
  border-radius: 6px;
  background: #fff;
  text-align: center;
  overflow: hidden;
  min-width: 0;
}
.bingo-cell.is-free { background: var(--bingo-gold); color: var(--bingo-green-dark); font-weight: 900; }
.cell-emoji { display: block; width: min(40px, 43%); height: auto; max-height: 40px; object-fit: contain; flex: 0 1 auto; }
.bingo-cell.emoji-only .cell-emoji { width: min(62px, 62%); max-height: 62px; }
.cell-emoji-missing { display: grid; place-items: center; width: 34px; height: 34px; border: 1px dashed #b7c8be; border-radius: 50%; color: #829088; font-size: 1rem; font-weight: 800; }
.cell-line { display: block; max-width: 100%; overflow-wrap: break-word; line-height: 1.15; }
.cell-line-zh { font-weight: 800; font-size: .82rem; color: var(--bingo-green-dark); }
.cell-line-py { font-size: .68rem; font-style: italic; color: var(--bingo-muted); }
.cell-line-en { font-size: .68rem; color: #46615a; }
.openmoji-sheet-credit { margin: 7px 0 0; color: var(--bingo-muted); text-align: right; font-size: .58rem; line-height: 1.25; }

@media (max-width: 980px) {
  .bingo-grid { grid-template-columns: 1fr; }
  .preview-panel { position: static; max-height: none; }
}
@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
  .mode-switch { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
}

@media print {
  body.bingo-page * { visibility: hidden; }
  #preview-area, #preview-area * { visibility: visible; }
  #preview-area { position: absolute; top: 0; left: 0; width: 100%; }
  .bingo-sheet { page-break-after: always; border: none; background: #fff; margin: 0; padding: 12px; }
  .bingo-sheet:last-child { page-break-after: auto; }
  .openmoji-sheet-credit { font-size: 7pt; }
}