/* ===========================
   照片翻转交互（保留）
   =========================== */

.photo-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
}

.photo-front,
.photo-back {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: var(--radius-photo);
  overflow: hidden;
}

.photo-front {
  background: transparent;
}

.photo-back {
  background: linear-gradient(135deg, #fff 0%, #FFF3D9 100%);
  transform: rotateY(180deg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 8px;
  text-align: center;
  border: 3px solid #fff;
  box-shadow: var(--shadow-photo);
}

.photo-back .date {
  font-size: 0.7rem;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.photo-back .text {
  font-family: var(--font-handwritten);
  font-size: 0.85rem;
  color: var(--color-text);
  line-height: 1.4;
}

/* ===========================
   模态框组件
   =========================== */

.modal-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.35s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  position: relative;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  transform: scale(0.9) translateY(20px);
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-content {
  transform: scale(1) translateY(0);
  opacity: 1;
}

.modal-image {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  border-radius: var(--radius-card);
  box-shadow: 0 10px 40px rgba(0,0,0,0.25);
}

.modal-info {
  text-align: center;
  margin-top: var(--spacing-md);
  color: #fff;
}

.modal-info .modal-date {
  font-size: 0.85rem;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.modal-info .modal-text {
  font-family: var(--font-handwritten);
  font-size: 1.05rem;
}

.modal-close {
  position: absolute;
  top: -38px; right: 0;
  width: 32px; height: 32px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff; font-size: 1.3rem;
  transition: background var(--duration-fast);
}
.modal-close:hover { background: rgba(255,255,255,0.35); }

/* 模态框导航箭头 */
.modal-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 46px; height: 46px;
  background: rgba(255,255,255,0.15);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.4rem;
  cursor: pointer; transition: background var(--duration-fast);
}
.modal-nav:hover { background: rgba(255,255,255,0.3); }
.modal-nav.prev { left: -60px; }
.modal-nav.next { right: -60px; }
.modal-nav.hidden { display: none; }

@media (max-width: 768px) {
  .modal-nav.prev { left: 8px; }
  .modal-nav.next { right: 8px; }
}

@media (max-width: 480px) {
  .modal-nav { width: 38px; height: 38px; font-size: 1.1rem; }
  .modal-nav.prev { left: 4px; }
  .modal-nav.next { right: 4px; }
}

/* 音乐播放器样式已统一到 layout.css */