/* DesssssignTool — интерфейс инструмента */

html, body { height: 100%; }
body.tool { overflow: hidden; }

.tool-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 316px;
  height: 100dvh;
  grid-template-rows: 62px minmax(0, 1fr) 44px;
  grid-template-areas:
    'head  head'
    'stage panel'
    'foot  panel';
}

body.tool .site-head { grid-area: head; position: static; backdrop-filter: none; background: var(--paper); }
body.tool .site-head .wrap { max-width: none; }
body.tool .site-foot { grid-area: foot; padding: 0; display: flex; align-items: center; border-top: 1px solid var(--line-soft); }
body.tool .site-foot .wrap { max-width: none; }

/* ---------------------------------------------------------------- */
/*  Сцена                                                            */
/* ---------------------------------------------------------------- */

.stage {
  grid-area: stage;
  position: relative;
  background: var(--stage, var(--stage-dark));
  overflow: hidden;
}

#view {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: crosshair;
  touch-action: none;
}

.hint {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  font-size: 13px;
  letter-spacing: -0.012em;
  color: color-mix(in srgb, var(--stage-fg, #fff) 46%, transparent);
  pointer-events: none;
  transition: opacity .45s ease;
  text-align: center;
}
.hint.gone { opacity: 0; }

/* ---------------------------------------------------------------- */
/*  Панель                                                           */
/* ---------------------------------------------------------------- */

.panel {
  grid-area: panel;
  border-left: 1px solid var(--line-soft);
  background: var(--paper);
  overflow-y: auto;
  overscroll-behavior: contain;
  display: flex;
  flex-direction: column;
}

.panel-intro { padding: 22px 22px 18px; border-bottom: 1px solid var(--line-soft); }

.panel-intro h1 {
  font-size: 1.6rem;
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 1.02;
}

/* Комментарий к кисти — сразу под названием, наверху панели */
.panel-note {
  margin-top: 9px;
  font-size: 13px;
  line-height: 1.42;
  letter-spacing: -0.012em;
  color: var(--muted);
}

.panel-controls { padding: 20px 22px 4px; flex: 1 0 auto; }

.panel-head {
  font-size: 12px;
  letter-spacing: -0.008em;
  color: var(--muted);
  padding-top: 14px;
  margin-bottom: 14px;
  border-top: 1px solid var(--line-soft);
}
.panel-controls > .panel-head:first-child { padding-top: 0; border-top: none; }

.ctl { margin-bottom: 15px; }
.ctl[hidden] { display: none; }

.ctl-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  font-size: 12.5px;
  letter-spacing: -0.012em;
  color: var(--ink-2);
  margin-bottom: 8px;
}

.ctl-value {
  font-size: 11.5px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.ctl-reset {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: -0.008em;
  padding: 2px 8px;
  border-radius: 999px;
  cursor: pointer;
  transition: all var(--t-fast);
}
.ctl-reset:hover { color: var(--ink); border-color: var(--ink); }

/* ---- ползунки ---- */

input[type='range'] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 16px;
  background: transparent;
  cursor: pointer;
  display: block;
}
input[type='range']::-webkit-slider-runnable-track {
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(to right, var(--ink) 0 var(--fill, 0%), var(--paper-3) var(--fill, 0%) 100%);
}
input[type='range']::-moz-range-track { height: 2px; border-radius: 2px; background: var(--paper-3); }
input[type='range']::-moz-range-progress { height: 2px; border-radius: 2px; background: var(--ink); }
input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 11px; height: 11px;
  margin-top: -4.5px;
  border-radius: 50%;
  background: var(--ink);
  transition: transform var(--t-fast);
}
input[type='range']::-moz-range-thumb {
  width: 11px; height: 11px;
  border: none;
  border-radius: 50%;
  background: var(--ink);
}
input[type='range']:hover::-webkit-slider-thumb { transform: scale(1.25); }
input[type='range']:focus-visible::-webkit-slider-thumb { box-shadow: 0 0 0 3px color-mix(in srgb, var(--ink) 22%, transparent); }

/* ---- сегменты ---- */

.seg {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.seg-btn {
  flex: 1 1 auto;
  min-width: 58px;
  padding: 7px 10px;
  font-size: 12.5px;
  letter-spacing: -0.014em;
  color: var(--ink-2);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: all var(--t-fast);
  white-space: nowrap;
}
.seg-btn:hover { border-color: var(--ink); }
.seg-btn.on { background: var(--ink); border-color: var(--ink); color: var(--paper); }

/* ---- цвет ---- */

.color-row { display: flex; gap: 8px; }

input[type='color'] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 30px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
}
input[type='color']::-webkit-color-swatch-wrapper { padding: 2px; }
input[type='color']::-webkit-color-swatch { border: none; border-radius: 2px; }
input[type='color']::-moz-color-swatch { border: none; border-radius: 2px; }

.swatches { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.sw {
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--ink) 16%, transparent);
  cursor: pointer;
  padding: 0;
  transition: transform var(--t-fast), box-shadow var(--t-fast);
}
.sw:hover { transform: scale(1.14); }
.sw.on { box-shadow: 0 0 0 1.5px var(--paper), 0 0 0 3px var(--ink); }

.color-pair { display: flex; gap: 10px; }
.color-cell {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 11.5px;
  color: var(--muted);
  letter-spacing: -0.01em;
  cursor: pointer;
}

/* ---- действия ---- */

.panel-actions {
  position: sticky;
  bottom: 0;
  background: var(--paper);
  border-top: 1px solid var(--line-soft);
  padding: 14px 22px 16px;
  margin-top: 12px;
}

.progress {
  height: 2px;
  background: var(--paper-3);
  border-radius: 2px;
  overflow: hidden;
  opacity: 0;
  transition: opacity var(--t-fast);
  margin-bottom: 12px;
}
.progress.on { opacity: 1; }
.progress i { display: block; height: 100%; width: 0; background: var(--ink); transition: width .1s linear; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 10px 14px;
  font-size: 13px;
  letter-spacing: -0.016em;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--t-fast);
  white-space: nowrap;
}
.btn:disabled { opacity: .38; cursor: default; }

.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:not(:disabled):hover { background: #000; }

.btn-outline { border-color: var(--line); background: transparent; }
.btn-outline:not(:disabled):hover { border-color: var(--ink); }

.btn-ghost { background: transparent; color: var(--muted); }
.btn-ghost:not(:disabled):hover { color: var(--ink); }

.btn-row { display: flex; gap: 8px; margin-top: 8px; }

/* Отмена, возврат и подсказка по клавишам живут в одной строке */
.hist-row {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
}
.hist-row .btn { width: auto; padding: 4px 9px; font-size: 12.5px; }
.hist-row .panel-keys { margin: 0 0 0 auto; text-align: right; line-height: 1.45; }

.check {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 12px;
  font-size: 12.5px;
  letter-spacing: -0.012em;
  color: var(--ink-2);
  cursor: pointer;
  user-select: none;
}
.check input { position: absolute; opacity: 0; width: 0; height: 0; }
.check-box {
  width: 15px; height: 15px;
  flex: none;
  border: 1px solid var(--line);
  border-radius: 3px;
  position: relative;
  transition: all var(--t-fast);
}
.check-box::after {
  content: '';
  position: absolute;
  left: 4px; top: 1px;
  width: 4px; height: 8px;
  border: solid var(--paper);
  border-width: 0 1.6px 1.6px 0;
  transform: rotate(45deg) scale(.4);
  opacity: 0;
  transition: all var(--t-fast);
}
.check input:checked + .check-box { background: var(--ink); border-color: var(--ink); }
.check input:checked + .check-box::after { opacity: 1; transform: rotate(45deg) scale(1); }
.check input:focus-visible + .check-box { box-shadow: 0 0 0 3px color-mix(in srgb, var(--ink) 20%, transparent); }

.panel-keys {
  margin-top: 12px;
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: -0.008em;
  color: var(--muted);
}
kbd {
  font: inherit;
  font-size: 10.5px;
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 1px 4px;
  margin-right: 2px;
  color: var(--ink-2);
}

.flash {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 12px);
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
  letter-spacing: -0.012em;
  padding: 9px 16px;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  transition: all .25s ease;
  z-index: 90;
}
.flash.on { opacity: 1; transform: translate(-50%, 0); }

/* ---- скроллбар панели ---- */
.panel::-webkit-scrollbar { width: 9px; }
.panel::-webkit-scrollbar-track { background: transparent; }
.panel::-webkit-scrollbar-thumb { background: var(--paper-3); border: 3px solid var(--paper); border-radius: 99px; }
.panel::-webkit-scrollbar-thumb:hover { background: var(--muted); }

/* ---------------------------------------------------------------- */

@media (max-width: 900px) {
  body.tool { overflow: auto; }
  .tool-layout {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: 62px 56vh auto auto;
    height: auto;
    min-height: 100dvh;
    grid-template-areas: 'head' 'stage' 'panel' 'foot';
  }
  .panel { border-left: none; border-top: 1px solid var(--line-soft); overflow: visible; }
  /* Панель разворачивается в столбец страницы: липкая полоса действий
     перекрыла бы настройки, поэтому она встаёт сразу под название кисти.
     Комментарий при этом остаётся первым — как и на широком экране. */
  .panel-intro { order: -2; }
  .panel-actions {
    position: static;
    order: -1;
    margin-top: 0;
    border-top: none;
    border-bottom: 1px solid var(--line-soft);
  }
  .panel-controls { padding-bottom: 24px; }
}