/* ============================================================
 * palette.css —— 调色盘按钮与面板
 * ============================================================ */

.palette-fab {
  --fab-color: #1B3A5C;
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 60;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  border: 0;
  cursor: pointer;
  display: grid;
  place-items: center;
  color: #fff;
  background:
    radial-gradient(circle at 30% 25%, rgba(255, 255, 255, .55), transparent 42%),
    conic-gradient(from 210deg, #E4572E, #F2B705, #4CAF50, #2E86DE, #7B4BD6, #E4572E);
  box-shadow: 0 10px 26px rgba(16, 24, 40, .28), 0 0 0 3px rgba(255, 255, 255, .92);
  transition: transform .16s ease, box-shadow .16s ease;
}
.palette-fab:hover { transform: translateY(-2px) scale(1.03); }
.palette-fab:active { transform: scale(.97); }
.palette-fab:focus-visible { outline: 3px solid var(--fab-color); outline-offset: 3px; }

.palette-fab svg { width: 26px; height: 26px; filter: drop-shadow(0 1px 1px rgba(0, 0, 0, .35)); }

.palette-fab::after {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 2px solid var(--fab-color);
  opacity: .55;
}

/* ---------------- 面板 ---------------- */
.palette-panel {
  position: fixed;
  right: 22px;
  bottom: 92px;
  z-index: 61;
  width: 312px;
  max-height: min(74vh, 620px);
  overflow: auto;
  background: #fff;
  border: 1px solid #E3E7EB;
  border-radius: 16px;
  box-shadow: 0 24px 60px rgba(16, 24, 40, .24);
  padding: 16px;
  font-family: var(--sans);
  color: #1A1A1A;
  opacity: 0;
  transform: translateY(10px) scale(.98);
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
}
.palette-panel.is-open {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.panel__title {
  font: 700 13px/1 var(--sans);
  letter-spacing: .06em;
}
.panel__close {
  border: 0;
  background: #F2F4F6;
  color: #5A6570;
  width: 26px; height: 26px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 15px;
  line-height: 1;
}
.panel__close:hover { background: #E7EAEE; }

.panel__section { margin-bottom: 14px; }
.panel__label {
  display: block;
  font: 600 11px/1 var(--sans);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: #8A949E;
  margin-bottom: 8px;
}

/* 模式切换 */
.mode-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.mode {
  position: relative;
  display: block;
  cursor: pointer;
}
.mode input { position: absolute; opacity: 0; pointer-events: none; }
.mode span {
  display: block;
  text-align: center;
  padding: 9px 6px;
  border: 1px solid #E3E7EB;
  border-radius: 10px;
  font-size: 12px;
  font-weight: 600;
  color: #5A6570;
  background: #FBFCFD;
  transition: all .16s;
}
.mode input:checked + span {
  border-color: var(--c-main);
  color: var(--c-main);
  background: color-mix(in srgb, var(--c-main) 8%, #fff);
  box-shadow: inset 0 0 0 1px var(--c-main);
}
.mode input:focus-visible + span { outline: 2px solid var(--c-main); outline-offset: 2px; }

.locknote {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  padding: 7px 9px;
  border-radius: 8px;
  background: #F4F6F8;
  color: #6B7580;
  font-size: 11px;
  line-height: 1.4;
}
.locknote[hidden] { display: none; }

/* 预置色块 */
.presets {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 7px;
}
.preset {
  position: relative;
  height: 34px;
  border-radius: 9px;
  border: 1px solid rgba(0, 0, 0, .08);
  cursor: pointer;
  padding: 0;
  transition: transform .12s, box-shadow .12s;
}
.preset::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--sw);
  border-radius: 8px;
}
.preset:hover { transform: translateY(-2px); }
.preset.is-active {
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--sw);
}
.preset__name {
  position: absolute;
  left: 50%;
  bottom: -15px;
  transform: translateX(-50%);
  font-size: 9px;
  color: #8A949E;
  white-space: nowrap;
  opacity: 0;
  transition: opacity .12s;
}
.preset:hover .preset__name, .preset.is-active .preset__name { opacity: 1; }

/* 自定义色 */
.custom-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
}
.color-input {
  width: 42px;
  height: 34px;
  padding: 0;
  border: 1px solid #E3E7EB;
  border-radius: 9px;
  background: #fff;
  cursor: pointer;
}
.color-input::-webkit-color-swatch-wrapper { padding: 3px; }
.color-input::-webkit-color-swatch { border: 0; border-radius: 6px; }

.hex-input {
  flex: 1;
  height: 34px;
  padding: 0 10px;
  border: 1px solid #E3E7EB;
  border-radius: 9px;
  font: 600 12.5px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: #1A1A1A;
}
.hex-input:focus { outline: 2px solid var(--c-main); outline-offset: 1px; border-color: var(--c-main); }

.swatch-current {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  border-radius: 9px;
  border: 1px solid #E3E7EB;
  background: var(--c-main);
}

/* 上传取色 */
.file-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}
.file-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border: 1px dashed #CDD4DB;
  border-radius: 9px;
  font-size: 12px;
  color: #5A6570;
  cursor: pointer;
  background: #FBFCFD;
}
.file-btn:hover { border-color: var(--c-main); color: var(--c-main); }
.file-btn input { display: none; }
.file-note { font-size: 11px; color: #8A949E; }

/* 开关 */
.switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
}
.switch-row span { font-size: 12.5px; color: #3C4752; }
.switch {
  position: relative;
  width: 40px;
  height: 22px;
  flex: 0 0 auto;
}
.switch input { position: absolute; opacity: 0; pointer-events: none; }
.switch i {
  position: absolute;
  inset: 0;
  background: #DDE2E7;
  border-radius: 999px;
  transition: background .16s;
}
.switch i::after {
  content: "";
  position: absolute;
  top: 3px; left: 3px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, .2);
  transition: transform .16s;
}
.switch input:checked + i { background: var(--c-main); }
.switch input:checked + i::after { transform: translateX(18px); }
.switch input:focus-visible + i { outline: 2px solid var(--c-main); outline-offset: 2px; }

/* 底部按钮 */
.panel__foot { border-top: 1px solid #EEF1F4; padding-top: 12px; margin-top: 4px; }
.reset-btn {
  width: 100%;
  padding: 10px;
  border: 1px solid #E3E7EB;
  border-radius: 10px;
  background: #fff;
  font: 600 12.5px/1 var(--sans);
  color: #3C4752;
  cursor: pointer;
}
.reset-btn:hover { border-color: var(--c-main); color: var(--c-main); }

/* ---------------- 移动端 ---------------- */
@media (max-width: 640px) {
  .palette-fab { right: 16px; bottom: 16px; width: 52px; height: 52px; }
  .palette-panel {
    right: 0;
    left: 0;
    bottom: 0;
    width: auto;
    max-height: 78vh;
    border-radius: 18px 18px 0 0;
    padding: 18px 16px 26px;
    transform: translateY(24px);
  }
  .presets { grid-template-columns: repeat(6, 1fr); gap: 6px; }
  .preset__name { display: none; }
}