/* ============================================================
   Project: Viewer Settings Panel
   p-settings — 3DGSビューワー設定パネル
   ============================================================ */

/* --- パネル本体 --- */

.p-settings {
  position: fixed;
  z-index: 100;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(340px, 90vw);
  display: flex;
  flex-direction: column;
  background: rgba(16, 17, 18, 0.6);
  backdrop-filter: blur(12px);
  color: rgba(255, 255, 255, 0.88);
  font-size: var(--font-size-sm);
  transform: translateX(100%);
  transition: transform 0.24s ease;
  overflow: hidden;
}

.p-settings.is-open {
  transform: translateX(0);
}

/* --- ヘッダー --- */

.p-settings__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  flex-shrink: 0;
}

.p-settings__title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
}

.p-settings__close {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: inherit;
  cursor: pointer;
  transition: background 0.14s;
}

.p-settings__close:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* --- スクロール領域 --- */

.p-settings__body {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.p-settings__body::-webkit-scrollbar {
  width: 4px;
}

.p-settings__body::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.18);
  border-radius: 2px;
}

/* --- セクション --- */

.p-settings__section {
  padding: var(--spacing-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.p-settings__section-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--spacing-sm);
}

/* --- フィールド共通 --- */

.p-settings__field[hidden] {
  display: none;
}

.p-settings__field {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--spacing-xs) var(--spacing-sm);
  min-height: 32px;
}

.p-settings__field + .p-settings__field {
  margin-top: var(--spacing-xs);
}

.p-settings__label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* --- スライダー --- */

.p-settings__field--slider {
  grid-template-columns: 1fr;
}

.p-settings__slider-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
}

.p-settings__slider-value {
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.5);
  min-width: 3.2em;
  text-align: right;
}

.p-settings__range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.14);
  outline: none;
  cursor: pointer;
  margin-top: 2px;
}

.p-settings__range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid rgba(255, 255, 255, 0.9);
  cursor: pointer;
  transition: transform 0.12s;
}

.p-settings__range::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.p-settings__range::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid rgba(255, 255, 255, 0.9);
  cursor: pointer;
}

/* --- トグル --- */

.p-settings__toggle {
  position: relative;
  width: 36px;
  height: 20px;
  border: 0;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.18);
  cursor: pointer;
  transition: background 0.18s;
  padding: 0;
  flex-shrink: 0;
}

.p-settings__toggle::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.18s;
}

.p-settings__toggle.is-on {
  background: var(--color-primary);
}

.p-settings__toggle.is-on::after {
  transform: translateX(16px);
}

/* --- セレクト --- */

.p-settings__select {
  padding: 4px 8px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  color: inherit;
  font-size: inherit;
  font-family: inherit;
  cursor: pointer;
}

.p-settings__select:focus {
  outline: 1px solid var(--color-primary);
}

/* --- カラーピッカー(小) --- */

.p-settings__color {
  width: 32px;
  height: 24px;
  padding: 1px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
}

.p-settings__color::-webkit-color-swatch-wrapper { padding: 0; }
.p-settings__color::-webkit-color-swatch { border: 0; border-radius: 3px; }
.p-settings__color::-moz-color-swatch { border: 0; border-radius: 3px; }

/* --- ボタン群 --- */

.p-settings__actions {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

.p-settings__actions--lens {
  flex-wrap: nowrap;
}

.p-settings__actions--lens .p-settings__btn {
  flex: 1;
  padding: 4px 4px;
  text-align: center;
}

.p-settings__btn {
  padding: 4px 12px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  color: inherit;
  font-size: var(--font-size-xs);
  cursor: pointer;
  transition: background 0.14s;
  white-space: nowrap;
}

.p-settings__btn:hover {
  background: rgba(255, 255, 255, 0.12);
}

.p-settings__btn.is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

/* --- フッター(ショートカット) --- */

.p-settings__footer {
  padding: var(--spacing-sm) var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.36);
  flex-shrink: 0;
}

.p-settings__shortcuts {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.p-settings__shortcuts kbd {
  display: inline-block;
  padding: 1px 5px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.06);
  font-family: inherit;
  font-size: inherit;
  margin-right: 2px;
}

/* --- 右上固定ボタン --- */

.p-settings-fab {
  position: fixed;
  z-index: 98;
  top: var(--spacing-md);
  right: var(--spacing-md);
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  background: rgba(16, 17, 18, 0.72);
  color: rgba(255, 255, 255, 0.82);
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: background 0.14s, transform 0.14s;
}

.p-settings-fab:hover {
  background: rgba(16, 17, 18, 0.92);
  transform: rotate(30deg);
}

.p-settings-fab svg {
  width: 20px;
  height: 20px;
}

/* --- 開閉式セクション --- */

.p-settings__section--collapsible {
  cursor: default;
}

.p-settings__section-title--toggle {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.p-settings__section-title--toggle::-webkit-details-marker {
  display: none;
}

.p-settings__section-title--toggle::after {
  content: "\25B6";
  font-size: 10px;
  transition: transform 0.18s;
  color: rgba(255, 255, 255, 0.36);
}

.p-settings__section--collapsible[open] > .p-settings__section-title--toggle::after {
  transform: rotate(90deg);
}

.p-settings__section--collapsible .p-settings__field--slider {
  margin-top: var(--spacing-sm);
}

/* --- ツールバー内ボタン(後方互換) --- */

.p-settings-toggle {
  position: relative;
}

.p-settings-toggle .c-icon {
  transition: transform 0.14s;
}

/* --- オーバーレイ (モバイル背景) --- */

.p-settings-overlay {
  display: none;
}

@media (max-width: 760px) {
  .p-settings-overlay.is-open {
    display: block;
    position: fixed;
    z-index: 99;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
  }
}