/* ===== lettering.css: فقط ظاهر مخصوص ابزار لترینگ (رنگ‌ها از theme.css می‌آیند) ===== */
.lt-grid { display: grid; gap: 16px; }
@media (min-width: 860px) {
  .lt-grid { grid-template-columns: minmax(0, 1fr) minmax(320px, 400px); align-items: start; gap: 24px; }
}

/* ---- پیش‌نمایش ---- */
.lt-preview {
  position: sticky;
  top: calc(var(--h-head) + env(safe-area-inset-top, 0px) + 8px);
  z-index: 5;
  background: var(--bg);
  padding-bottom: 4px;
}
@media (min-width: 860px) { .lt-preview { top: calc(var(--h-head) + env(safe-area-inset-top, 0px) + 20px); } }

.lt-stage {
  min-height: 160px;
  display: grid; place-items: center;
  padding: 12px;
  border: 1px solid var(--line); border-radius: 16px;
  background-color: #e9edef;
  background-image:
    linear-gradient(45deg, #d3d9dc 25%, transparent 25%, transparent 75%, #d3d9dc 75%),
    linear-gradient(45deg, #d3d9dc 25%, transparent 25%, transparent 75%, #d3d9dc 75%);
  background-size: 16px 16px;
  background-position: 0 0, 8px 8px;
  overflow: hidden;
}
.lt-stage.on-dark {
  background-color: #3a4651;
  background-image:
    linear-gradient(45deg, #2c363f 25%, transparent 25%, transparent 75%, #2c363f 75%),
    linear-gradient(45deg, #2c363f 25%, transparent 25%, transparent 75%, #2c363f 75%);
}
.lt-stage canvas { display: block; max-width: 100%; }
.lt-empty { margin: 0; padding: 12px; text-align: center; font-size: 14px; color: #3d4a52; }
.lt-stage.on-dark .lt-empty { color: #c5cace; }
.lt-meta { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin: 8px 4px 0; font-size: 13px; color: var(--fg2); min-height: 20px; }
.lt-meta p { margin: 0; }

/* ---- کنترل‌ها ---- */
.lt-controls .field:last-child { margin-bottom: 0; }
.lt-controls fieldset { border: 1px solid var(--line); border-radius: 12px; padding: 12px 12px 0; margin: 0 0 16px; min-width: 0; }
.lt-controls legend { padding: 0 8px; font-size: 14px; font-weight: 600; color: var(--accent); }
.lt-row { display: grid; gap: 0 12px; }
@media (min-width: 420px) { .lt-row.two { grid-template-columns: 1.4fr 1fr; } }
.lt-controls select {
  width: 100%; min-height: 44px; background: var(--card); color: var(--fg);
  border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; font: inherit; font-size: 16px;
}
.lt-controls select:disabled { opacity: .6; }
.lt-controls textarea { min-height: 88px; font-family: var(--font-ui); line-height: 1.7; }
.lt-controls .range-head { display: flex; justify-content: space-between; align-items: baseline; }
.lt-controls output { font-size: 13px; color: var(--fg2); font-variant-numeric: tabular-nums; }
.lt-controls input[type="range"] { width: 100%; min-height: 32px; accent-color: var(--accent); }
.lt-controls input[type="color"] {
  width: 56px; height: 44px; padding: 3px; background: var(--card);
  border: 1px solid var(--line); border-radius: 12px; cursor: pointer;
}

.seg { display: flex; gap: 6px; flex-wrap: wrap; }
.seg label {
  flex: 1 1 0; min-width: 72px; text-align: center; cursor: pointer;
  min-height: 44px; display: grid; place-items: center; padding: 6px 12px;
  border: 1px solid var(--line); border-radius: 9999px; background: transparent;
  font-size: 14px; font-weight: 500; color: var(--fg2);
}
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label:has(input:checked) { background: var(--badge-bg); color: var(--accent); border-color: var(--accent); }
.seg label:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: 2px; }

.check { display: flex; align-items: center; gap: 10px; min-height: 44px; cursor: pointer; font-size: 15px; }
.check input { width: 22px; height: 22px; accent-color: var(--accent); }
.check small { display: block; font-size: 12px; color: var(--fg3); }

.lt-actions { display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; }
.lt-actions .btn { flex: 1 1 140px; }
.lt-actions .btn:disabled { opacity: .45; cursor: not-allowed; filter: none; }

.lt-result { margin-top: 16px; text-align: center; }
.lt-result img { max-width: 100%; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.lt-result p { margin: 8px 0 0; font-size: 13px; color: var(--fg2); }

.lt-controls .lbl { font-size: 14px; font-weight: 500; color: var(--fg2); }

@media (min-width: 420px) { .lt-row.eq { grid-template-columns: 1fr 1fr; } }

/* موبایل: ارتفاع پیش‌نمایش محدود تا کنترل‌ها زیر عکس نروند */
@media (max-width: 859px) {
  .lt-stage { max-height: 38vh; max-height: 38dvh; }
  .lt-stage canvas, .lt-stage img { max-height: calc(38dvh - 26px); max-height: calc(38vh - 26px); width: auto !important; height: auto !important; object-fit: contain; }
}