/* Bước 3 · Art */
.art-top { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); margin-bottom: 24px; }
@media (max-width: 960px) { .art-top { grid-template-columns: 1fr; } }
.art-toggles { margin: 16px 0 8px; }
.range-field { max-width: 360px; }
.range-row { display: flex; align-items: center; gap: 12px; }
.range-row input { flex: 1; accent-color: var(--accent); }
.range-row output { min-width: 36px; font-weight: 600; }
.mini-steps { margin: 0 0 4px; padding-left: 20px; display: grid; gap: 4px; }

.drop-zone {
  margin-top: 14px; display: grid; justify-items: center; gap: 6px; text-align: center;
  padding: 24px 16px; border: 2px dashed #D9B9C2; border-radius: 16px; background: #FFFAF8;
  transition: background .15s, border-color .15s;
}
.drop-zone .icon { width: 28px; height: 28px; color: var(--accent); }
.drop-zone.is-over, .art-card.is-over { border-color: var(--accent); background: var(--error-bg); }

.art-grid {
  list-style: none; margin: 0 0 16px; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px;
}
.art-card {
  display: flex; flex-direction: column; gap: 10px; padding: 12px;
  border: 1px solid var(--border); border-radius: 16px; background: #fff; transition: border-color .15s, background .15s;
}
.art-card.is-uploading { opacity: .6; pointer-events: none; }
.art-card-head { display: flex; align-items: center; gap: 8px; min-width: 0; }
.art-card-head .coupon-num { margin-top: 0; }
.art-card-head .coupon-title { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.art-thumb {
  aspect-ratio: 1; display: grid; place-items: center; overflow: hidden;
  border-radius: 12px; background: var(--bg); border: 1px solid var(--border);
}
.art-thumb img, .art-thumb canvas { width: 100%; height: 100%; object-fit: contain; }
.art-thumb canvas.checker, .art-thumb.has-image {
  background-color: #fff;
  background-image: linear-gradient(45deg, #EEE 25%, transparent 25%), linear-gradient(-45deg, #EEE 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #EEE 75%), linear-gradient(-45deg, transparent 75%, #EEE 75%);
  background-size: 16px 16px; background-position: 0 0, 0 8px, 8px -8px, -8px 0;
}
.art-thumb.is-icon { background: var(--error-bg); color: var(--accent-text); }
.art-empty { display: grid; justify-items: center; gap: 4px; color: var(--text-muted); }
.art-notes:empty { display: none; }
.dpi-warn { display: flex; gap: 6px; align-items: flex-start; margin: 0; padding: 8px 10px; border-radius: 10px; background: var(--warn-bg); color: var(--warn); font-size: .82rem; font-weight: 500; }
.dpi-warn.is-error { background: var(--error-bg); color: var(--error); }
.dpi-warn .icon { width: 16px; height: 16px; margin-top: 1px; }
.art-actions { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.art-actions .icon { width: 16px; height: 16px; }
.art-subject summary { cursor: pointer; font-size: .88rem; font-weight: 600; color: var(--accent-text); min-height: 32px; display: flex; align-items: center; }
.art-subject textarea { margin: 6px 0 4px; font-size: .88rem; }

/* Chọn icon */
.modal-wide { width: min(720px, calc(100vw - 32px)); }
.modal-wide input[type=search] { margin: 8px 0 14px; }
.icon-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(64px, 1fr)); gap: 8px; max-height: 60vh; overflow-y: auto; padding: 2px; }
.icon-choice {
  display: grid; place-items: center; aspect-ratio: 1; border: 1px solid var(--border); border-radius: 12px;
  background: #fff; color: var(--text); cursor: pointer;
}
.icon-choice:hover { border-color: var(--accent); color: var(--accent-text); }
.icon-choice.is-selected { border: 2px solid var(--accent); background: var(--error-bg); color: var(--accent-text); }
.art-icon { display: inline-flex; }

/* Chọn kiểu hình: không tranh / icon / tranh AI */
.mode-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.mode-card {
  position: relative; display: grid; gap: 4px; padding: 14px 16px; border-radius: 16px; cursor: pointer;
  border: 2px solid var(--border); background: #fff;
}
.mode-card input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.mode-card:hover { border-color: #D9B9C2; }
.mode-card.is-selected { border-color: var(--accent); background: var(--error-bg); }
.mode-card:has(input:focus-visible) { outline: 3px solid var(--focus); outline-offset: 2px; }
.step-panel > .panel-body > .card + .card, .step-panel > .panel-body > .card + .editor-grid { margin-top: 24px; }