/* ============================================================
 * 图片幻灯片 - 主样式
 * 设计思路：
 *   - 舞台（.stage）始终占满视口，全屏时跟随全屏元素
 *   - .slideshow 中两张 .slide 重叠，使用 .active 类控制显示
 *   - 不同动画由 .anim-* 类驱动，使用 CSS 变量控制时长和方向
 * ============================================================ */

:root {
  --primary: #4f8cff;
  --primary-hover: #3a7bff;
  --bg: #000;
  --text: #fff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --panel-bg: rgba(20, 20, 20, 0.96);
  --border: rgba(255, 255, 255, 0.12);
  --danger: #ff5f56;
  --warn: #ffb84f;
  --success: #5cd97a;
}

/* ---------- Reset ---------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Microsoft YaHei', Roboto, sans-serif;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}

button {
  font: inherit;
}

/* ============================================================
 * 舞台
 * ============================================================ */
.stage {
  position: fixed;
  inset: 0;
  background: #000;
  overflow: hidden;
  cursor: default;
}

/* ============================================================
 * 幻灯片
 * ============================================================ */
.slideshow {
  position: absolute;
  inset: 0;
  /* 动画时长（JS 设置） */
  --anim-duration: 1000ms;
  --enter-from: 100%;
  --exit-to: -100%;
}

.slide {
  position: absolute;
  inset: 0;
  background-color: #000;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center center;
  opacity: 0;
  will-change: opacity, transform;
}

/* ---------- none：直接切换 ---------- */
.anim-none .slide {
  transition: none !important;
}
.anim-none .slide.active {
  opacity: 1;
}

/* ---------- fade：仅透明度过渡 ---------- */
.anim-fade .slide {
  transition: opacity var(--anim-duration) ease;
}
.anim-fade .slide.active {
  opacity: 1;
}

/* ---------- slide：平移（方向由 --enter-from / --exit-to 决定） ---------- */
.anim-slide .slide {
  transition:
    transform var(--anim-duration) cubic-bezier(0.45, 0.05, 0.55, 0.95),
    opacity var(--anim-duration) ease;
}
.anim-slide .slide:not(.active) {
  opacity: 0;
  transform: translateX(var(--exit-to, -100%));
}
.anim-slide .slide.active {
  opacity: 1;
  transform: translateX(0);
}

/* ---------- zoom：缩放 ---------- */
.anim-zoom .slide {
  transition:
    transform var(--anim-duration) ease,
    opacity var(--anim-duration) ease;
  transform-origin: center center;
}
.anim-zoom .slide:not(.active) {
  opacity: 0;
  transform: scale(1.15);
}
.anim-zoom .slide.active {
  opacity: 1;
  transform: scale(1);
}

/* ---------- flip：3D 翻转 ---------- */
.anim-flip .slide {
  transition:
    transform var(--anim-duration) ease,
    opacity var(--anim-duration) ease;
  transform-origin: center center;
  backface-visibility: hidden;
  perspective: 1200px;
}
.anim-flip .slide:not(.active) {
  opacity: 0;
  transform: rotateY(90deg);
}
.anim-flip .slide.active {
  opacity: 1;
  transform: rotateY(0deg);
}

/* 进入动画初始位置（无过渡）。
   仅在切换的瞬间使用 .entering 类，
   强制将下一张幻灯片定位到屏幕外的"进入位置"。
   !important 是为了临时胜过各动画自己的 .active 规则。 */
.slide.entering {
  opacity: 0 !important;
  transition: none !important;
}

.anim-slide .slide.entering {
  transform: translateX(var(--enter-from, 100%)) !important;
}
.anim-zoom .slide.entering {
  transform: scale(0.7) !important;
}
.anim-flip .slide.entering {
  transform: rotateY(90deg) !important;
}

/* ============================================================
 * 空状态 / 加载状态
 * ============================================================ */
.hint,
.loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  z-index: 5;
  pointer-events: none;
}

/* 让 HTML 的 [hidden] 属性真正生效。
   用户样式 .hint { display: flex } 的特异性为 (0,0,1,0)，
   足以覆盖 UA 默认 [hidden] { display: none } —— 因此加了 hidden 属性也不隐藏。
   提升特异性到 (0,0,2,0) 后，hidden 属性重新生效。 */
.hint[hidden],
.loading[hidden] {
  display: none;
}

.hint-title {
  font-size: 36px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.hint-desc {
  color: var(--text-secondary);
  font-size: 16px;
  max-width: 520px;
  line-height: 1.6;
}

.hint-meta {
  margin-top: 32px;
  color: rgba(255, 255, 255, 0.45);
  font-size: 13px;
  max-width: 540px;
  line-height: 1.6;
}

.kbd {
  display: inline-block;
  min-width: 24px;
  padding: 2px 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  font-family: inherit;
}

.loading p {
  color: var(--text-secondary);
  margin-top: 16px;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 3px solid rgba(255, 255, 255, 0.2);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================================
 * 控制按钮
 * ============================================================ */
.controls {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  gap: 8px;
  z-index: 10;
  opacity: 0.35;
  transition: opacity 0.25s ease;
}

.controls:hover,
.controls:focus-within {
  opacity: 1;
}

.control-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: rgba(0, 0, 0, 0.55);
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
  transition:
    background 0.2s ease,
    transform 0.2s ease,
    box-shadow 0.2s ease;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.control-btn:hover {
  background: rgba(0, 0, 0, 0.85);
  transform: scale(1.08);
}

.control-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.control-btn:active {
  transform: scale(0.95);
}

/* ============================================================
 * 模态框
 * ============================================================ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal[hidden] {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  cursor: pointer;
}

.modal-content {
  position: relative;
  background: var(--panel-bg);
  border-radius: 12px;
  border: 1px solid var(--border);
  width: min(640px, calc(100vw - 32px));
  max-height: calc(100vh - 32px);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  animation: modalIn 0.2s ease;
}

@keyframes modalIn {
  from { transform: translateY(20px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.modal-header h2 {
  font-size: 18px;
  font-weight: 600;
}

.close-btn {
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease;
}

.close-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

.modal-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
}

.modal-footer {
  padding: 14px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  flex-shrink: 0;
}

/* ---------- 设置分区 ---------- */
.setting-section {
  margin-bottom: 24px;
}

.setting-section:last-child {
  margin-bottom: 0;
}

.setting-section h3 {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.section-header h3 {
  margin: 0;
}

.setting-tip {
  color: var(--warn);
  font-size: 13px;
  margin-bottom: 12px;
  padding: 8px 12px;
  background: rgba(255, 184, 79, 0.08);
  border: 1px solid rgba(255, 184, 79, 0.25);
  border-radius: 6px;
  line-height: 1.5;
}

/* ---------- 表单 ---------- */
.form-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.form-row input[type='range'] {
  flex: 1;
  min-width: 180px;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 2px;
  outline: none;
}

.form-row input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: none;
}

.form-row input[type='range']::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: none;
}

.form-row input[type='number'] {
  width: 100px;
  padding: 7px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s ease;
}

.form-row input[type='number']:focus {
  border-color: var(--primary);
}

.form-row select {
  padding: 8px 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  min-width: 180px;
  outline: none;
}

.form-row select:focus {
  border-color: var(--primary);
}

.form-row select option {
  background: #1c1c1c;
  color: #fff;
}

.unit {
  color: var(--text-secondary);
  font-size: 13px;
}

/* ---------- 切换开关 ---------- */
.toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}

.toggle input[type='checkbox'] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.toggle-slider {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  transition: background 0.2s ease;
  flex-shrink: 0;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  left: 3px;
  top: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.2s ease;
}

.toggle input:checked + .toggle-slider {
  background: var(--primary);
}

.toggle input:checked + .toggle-slider::before {
  transform: translateX(18px);
}

.toggle input:focus-visible + .toggle-slider {
  box-shadow: 0 0 0 2px rgba(79, 140, 255, 0.4);
}

.toggle-text {
  color: var(--text-secondary);
  font-size: 13px;
}

/* ---------- 目录列表 ---------- */
.directory-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.directory-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.directory-info {
  flex: 1;
  min-width: 0;
}

.directory-name {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text);
}

.directory-meta {
  color: var(--text-secondary);
  font-size: 12px;
  margin-top: 2px;
}

.directory-status {
  font-size: 16px;
  width: 26px;
  text-align: center;
  flex-shrink: 0;
}

.directory-status.ok   { color: var(--success); }
.directory-status.warn { color: var(--warn); }
.directory-status.err  { color: var(--danger); }
.directory-status.pending { color: var(--text-secondary); }

.directory-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.icon-btn {
  width: 28px;
  height: 28px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.12);
}

.icon-btn.danger {
  color: var(--danger);
}

.icon-btn.danger:hover {
  background: rgba(255, 95, 86, 0.18);
  border-color: rgba(255, 95, 86, 0.4);
}

.empty-list {
  padding: 24px;
  text-align: center;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
  border: 1px dashed var(--border);
  border-radius: 8px;
  font-size: 13px;
}

/* ============================================================
 * 按钮
 * ============================================================ */
.primary-btn {
  padding: 8px 18px;
  border: none;
  background: var(--primary);
  color: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.2s ease;
}

.primary-btn:hover {
  background: var(--primary-hover);
}

.primary-btn:disabled {
  background: rgba(255, 255, 255, 0.1);
  cursor: not-allowed;
  opacity: 0.6;
}

.secondary-btn {
  padding: 8px 18px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.2s ease;
}

.secondary-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}

/* ============================================================
 * 滚动条
 * ============================================================ */
.modal-body::-webkit-scrollbar {
  width: 8px;
}

.modal-body::-webkit-scrollbar-track {
  background: transparent;
}

.modal-body::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
}

.modal-body::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* ============================================================
 * 全屏：舞台自身进入全屏时让里面的内容继续 100% 占据
 * ============================================================ */
.stage:fullscreen,
.stage:-webkit-full-screen {
  width: 100vw;
  height: 100vh;
}

@supports (height: 100dvh) {
  .stage { height: 100dvh; }
}

/* ============================================================
 * 较小屏幕适配
 * ============================================================ */
@media (max-width: 600px) {
  .hint-title { font-size: 28px; }
  .hint-desc  { font-size: 14px; }
  .controls   { bottom: 16px; right: 16px; gap: 6px; }
  .control-btn { width: 40px; height: 40px; font-size: 16px; }
  .modal-content { width: calc(100vw - 16px); }
  .modal-header,
  .modal-body,
  .modal-footer { padding-left: 16px; padding-right: 16px; }
}