/* Bước 4 · Layout */
.layout-grid { display: grid; grid-template-columns: 150px minmax(0, 1fr) 340px; gap: 18px; align-items: start; }
@media (max-width: 1200px) { .layout-grid { grid-template-columns: 120px minmax(0, 1fr); } .controls-col { grid-column: 1 / -1; } }
@media (max-width: 700px) { .layout-grid { grid-template-columns: 1fr; } .thumbs-card { order: 2; } }
.layout-grid .card { margin-bottom: 0; }
.preview-col, .controls-col { display: grid; gap: 18px; min-width: 0; }
.small-title { font-size: 1rem; margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }

.thumbs-card { position: sticky; top: 12px; padding: 12px; }
.thumbs { list-style: none; margin: 0; padding: 2px; display: grid; gap: 10px; max-height: calc(100vh - 140px); overflow-y: auto; }
.thumb { display: grid; gap: 4px; width: 100%; padding: 4px; border: 2px solid transparent; border-radius: 10px; background: none; cursor: pointer; font: inherit; }
.thumb:hover { border-color: var(--border); }
.thumb.is-current { border-color: var(--accent); background: var(--error-bg); }
.thumb.has-problem .thumb-num { background: var(--error); color: #fff; }
.thumb-art { display: block; width: 100%; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.18); overflow: hidden; }
.thumb-art svg { display: block; width: 100%; height: 100%; }
.thumb-num { justify-self: center; font-size: .75rem; font-weight: 600; padding: 0 6px; border-radius: 6px; }

.preview-card { padding: 14px; }
.preview-nav { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 10px; }
.page-info { margin: 0; font-weight: 600; text-align: center; }
.page-preview { background: #EEE9EC; border-radius: 12px; padding: 18px; }
.page-preview svg { display: block; width: 100%; height: auto; background: #fff; box-shadow: 0 6px 22px rgba(0,0,0,.18); }
.legend { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 10px 0 0; }
.swatch { display: inline-block; width: 14px; height: 14px; border-radius: 3px; }
.swatch-bleed { background: rgba(37,99,235,.3); border: 1px solid #2563EB; }
.swatch-safe { border: 2px dashed #E0A800; margin-left: 10px; }

.quick-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 700px) { .quick-grid { grid-template-columns: 1fr; } }

.layout-controls { display: grid; gap: 18px; }
.layout-controls .card { display: grid; gap: 14px; }
.tpl-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.tpl-choice { display: grid; gap: 4px; padding: 5px; border: 2px solid var(--border); border-radius: 10px; background: #fff; cursor: pointer; font: inherit; }
.tpl-choice:hover { border-color: #D9B9C2; }
.tpl-choice.is-selected { border-color: var(--accent); background: var(--error-bg); }
.tpl-art svg { display: block; width: 100%; height: auto; }
.tpl-name { font-size: .72rem; font-weight: 600; line-height: 1.2; }
.swatch-pill { padding: 0 12px; }
.swatches { display: inline-flex; }
.swatches i { width: 12px; height: 12px; border-radius: 50%; border: 1px solid rgba(0,0,0,.15); margin-left: -3px; }
.swatches i:first-child { margin-left: 0; }
.block { display: block; }
.toggle small { font-weight: 400; }

.kdp-check { border-width: 2px; }
.kdp-check.is-ok { border-color: #8FD3AA; background: #F3FBF6; }
.kdp-check.is-bad { border-color: #F0A3B3; background: #FFF6F8; }
.kdp-check.is-ok .small-title { color: var(--ok); }
.kdp-check.is-bad .small-title { color: var(--error); }
.check-items { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: .88rem; }
.check-items li { display: flex; gap: 8px; align-items: flex-start; }
.check-items .icon { width: 16px; height: 16px; margin-top: 2px; }
.check-ok .icon { color: var(--ok); }
.check-bad { color: var(--error); font-weight: 600; }
.check-warn { color: var(--warn); font-weight: 600; }
.jump-list { display: inline-flex; flex-wrap: wrap; gap: 6px; margin-left: 4px; }
.jump-list .link-button { min-height: 24px; padding: 0; }

progress { width: 100%; height: 10px; margin-top: 10px; accent-color: var(--accent); }
.loading-card { display: flex; align-items: center; gap: 12px; }
.spinner { width: 22px; height: 22px; border-radius: 50%; border: 3px solid var(--border); border-top-color: var(--accent); animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation-duration: 3s; } }

/* Khung khách tự thiết kế */
.frame-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.frame-item { display: grid; gap: 8px; padding: 10px; border: 1px solid var(--border); border-radius: 12px; }
.frame-head { display: grid; grid-template-columns: 72px 1fr auto; gap: 10px; align-items: center; }
.frame-thumb {
  width: 72px; height: 52px; object-fit: contain; border-radius: 6px; border: 1px solid var(--border);
  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: 10px 10px; background-position: 0 0, 0 5px, 5px -5px, -5px 0;
}
.frame-edit summary { cursor: pointer; font-weight: 600; font-size: .88rem; color: var(--accent-text); min-height: 32px; display: flex; align-items: center; }
.frame-edit { display: grid; gap: 6px; }
.frame-edit .range-field { max-width: none; }