/* ===== 时光胶囊 · 公共回忆相册 ===== */
/* 设计方向：暖纸质感 · 琥珀金调 · 非AI风格 */

:root {
  --bg: #faf6ef;
  --bg-tint: #f3ece0;
  --paper: #fffdf8;
  --ink: #2c2418;
  --ink-light: #6b5d4f;
  --ink-faint: #a89a85;
  --accent: #c8893e;
  --accent-light: #e0a856;
  --accent-deep: #9c6a2e;
  --rose: #c46a5a;
  --border: rgba(44, 36, 24, 0.1);
  --border-strong: rgba(44, 36, 24, 0.18);
  --shadow-sm: 0 1px 3px rgba(44, 36, 24, 0.06);
  --shadow-md: 0 4px 16px rgba(44, 36, 24, 0.08);
  --shadow-lg: 0 12px 40px rgba(44, 36, 24, 0.12);
  --radius: 10px;
  --radius-sm: 6px;
  --serif: 'Noto Serif SC', 'Songti SC', serif;
  --display: 'Cormorant Garamond', 'Noto Serif SC', serif;
}

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

body {
  font-family: var(--serif);
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 纸纹背景层 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(200, 137, 62, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(196, 106, 90, 0.04) 0%, transparent 50%),
    var(--bg);
}

/* 噪点纹理 */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.025;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* 粒子画布 */
#particle-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.6;
}

/* ===== 开屏动画 ===== */
#splash-screen {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg);
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  transition: opacity 0.8s ease;
}

.splash-content { max-width: 85%; }

.splash-icon {
  color: var(--accent);
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeInScale 1s 0.2s forwards;
}

.splash-title {
  font-family: var(--display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 12px;
  opacity: 0;
  animation: fadeInUp 0.8s 0.5s forwards;
  letter-spacing: 2px;
}

.splash-sub {
  font-size: 0.95rem;
  color: var(--ink-light);
  line-height: 1.8;
  opacity: 0;
  animation: fadeInUp 0.8s 1s forwards;
}

.splash-author {
  margin-top: 20px;
  font-size: 0.8rem;
  color: var(--accent-deep);
  letter-spacing: 3px;
  opacity: 0;
  animation: fadeInUp 0.8s 1.5s forwards;
}

@keyframes fadeInScale {
  from { opacity: 0; transform: scale(0.8); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 顶栏 ===== */
#topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 24px;
  background: rgba(250, 246, 239, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
}

.topbar-logo {
  flex-shrink: 0;
}

.topbar-logo-frame {
  display: inline-flex;
  align-items: center;
  width: 134px;
  height: 40px;
  padding: 4px 7px;
  border: 1px solid var(--border-strong);
  border-radius: 11px;
  background: #0a0e1a;
  box-shadow: var(--shadow-sm);
}

.topbar-logo-frame img { display: block; width: 100%; height: 100%; object-fit: contain; }

.topbar-title {
  font-family: var(--display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  user-select: none;
  letter-spacing: 1px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sort-tabs {
  display: flex;
  gap: 2px;
  background: var(--bg-tint);
  padding: 3px;
  border-radius: 8px;
}

.tab {
  padding: 4px 12px;
  font-size: 0.82rem;
  cursor: pointer;
  border-radius: 5px;
  transition: all 0.25s;
  color: var(--ink-light);
  user-select: none;
}

.tab.active {
  background: var(--paper);
  color: var(--accent-deep);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-tint);
  padding: 5px 12px;
  border-radius: 20px;
  border: 1px solid var(--border);
  color: var(--ink-faint);
  transition: border-color 0.25s;
}

.search-box:focus-within { border-color: var(--accent-light); }

.search-box input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--ink);
  font-size: 0.82rem;
  width: 140px;
  font-family: var(--serif);
}

.btn-upload {
  display: flex;
  align-items: center;
  gap: 5px;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-family: var(--serif);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
  white-space: nowrap;
}

.btn-upload:hover {
  background: var(--accent-deep);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(200, 137, 62, 0.3);
}

.btn-upload.full-width { width: 100%; justify-content: center; padding: 10px; margin-top: 12px; }

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tint);
  color: var(--ink-light);
  border: 1px solid var(--border);
  padding: 6px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.25s;
}

.btn-icon:hover { color: var(--accent); border-color: var(--accent-light); }

/* ===== 瀑布流 ===== */
.masonry {
  padding: 20px 24px 60px;
  column-count: 4;
  column-gap: 16px;
  position: relative;
  z-index: 1;
}

.card {
  break-inside: avoid;
  margin-bottom: 16px;
  background: var(--paper);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.3s;
  opacity: 0;
  animation: cardReveal 0.5s forwards;
}

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

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}

.card-img-wrapper {
  position: relative;
  width: 100%;
  cursor: pointer;
  overflow: hidden;
}

.card-img-wrapper img {
  width: 100%;
  display: block;
  transition: transform 0.4s ease;
}

.card:hover .card-img-wrapper img { transform: scale(1.03); }

.video-badge {
  position: absolute;
  bottom: 8px;
  left: 8px;
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(44, 36, 24, 0.65);
  color: #fff;
  padding: 3px 8px;
  border-radius: 12px;
  font-size: 0.7rem;
  backdrop-filter: blur(4px);
}

.card-info { padding: 10px 12px 12px; }

.card-remark {
  font-size: 0.85rem;
  line-height: 1.5;
  margin-bottom: 8px;
  color: var(--ink);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--ink-faint);
}

.card-nickname {
  display: flex;
  align-items: center;
  gap: 4px;
}

.like-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  transition: color 0.2s;
  user-select: none;
}

.like-btn:hover { color: var(--rose); }
.like-btn.liked { color: var(--rose); }

.card-time {
  font-size: 0.68rem;
  color: var(--ink-faint);
  margin-top: 6px;
}

/* ===== 空状态 ===== */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--ink-faint);
}

.empty-state p {
  margin-top: 16px;
  font-size: 0.9rem;
}

/* ===== 弹窗 ===== */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(44, 36, 24, 0.35);
  backdrop-filter: blur(6px);
  z-index: 1000;
  display: none;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: opacity 0.3s;
}

.modal.show { display: flex; opacity: 1; }

.modal-content {
  width: 90%;
  max-width: 460px;
  background: var(--paper);
  border-radius: 14px;
  padding: 24px;
  position: relative;
  transform: scale(0.92) translateY(10px);
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.modal.show .modal-content { transform: scale(1) translateY(0); }

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-header h3 {
  font-family: var(--display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ink);
}

.close-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tint);
  border: none;
  padding: 6px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--ink-light);
  transition: all 0.2s;
}

.close-btn:hover { background: var(--border); color: var(--ink); transform: rotate(90deg); }

/* 协议区 */
.agreement-box {
  background: var(--bg-tint);
  border-radius: var(--radius);
  padding: 16px;
  border: 1px solid var(--border);
}

.agreement-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-deep);
  margin-bottom: 10px;
}

.agreement-text {
  font-size: 0.78rem;
  color: var(--ink-light);
  line-height: 1.8;
  margin-bottom: 12px;
}

.agree-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--ink);
  cursor: pointer;
}

.agree-label input { accent-color: var(--accent); }

/* 表单 */
.glass-input {
  width: 100%;
  background: var(--bg-tint);
  border: 1px solid var(--border);
  color: var(--ink);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  outline: none;
  font-size: 0.85rem;
  font-family: var(--serif);
  transition: border-color 0.25s;
  resize: vertical;
}

.glass-input:focus { border-color: var(--accent-light); }
.glass-input::placeholder { color: var(--ink-faint); }

.file-select-area {
  border: 2px dashed var(--border-strong);
  padding: 28px 16px;
  text-align: center;
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--ink-faint);
  transition: all 0.25s;
}

.file-select-area:hover {
  border-color: var(--accent-light);
  color: var(--accent);
  background: rgba(200, 137, 62, 0.04);
}

.file-select-area p {
  margin-top: 8px;
  font-size: 0.82rem;
}

.selected-files {
  margin: 8px 0;
  font-size: 0.78rem;
  color: var(--ink-light);
}

/* 进度条 */
.progress-bar-container {
  width: 100%;
  height: 3px;
  background: var(--bg-tint);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 16px;
}

.progress-bar {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 2px;
}

#splash-progress {
  animation: splashProgress 2.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes splashProgress {
  to { width: 100%; }
}

/* 预览弹窗 */
.preview-modal {
  background: rgba(44, 36, 24, 0.85);
}

.preview-close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: rgba(255, 255, 255, 0.12);
  border: none;
  padding: 8px;
  border-radius: 50%;
  cursor: pointer;
  color: #fff;
  z-index: 1001;
  transition: all 0.2s;
}

.preview-close:hover { background: rgba(255, 255, 255, 0.2); }

.preview-content {
  max-width: 90%;
  max-height: 90vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.preview-content img,
.preview-content video {
  max-width: 100%;
  max-height: 90vh;
  border-radius: 8px;
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.4);
}

/* 管理面板 */
.admin-stats { display: flex; flex-direction: column; gap: 12px; }

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-tint);
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.stat-label { font-size: 0.85rem; color: var(--ink-light); }
.stat-value { font-weight: 700; font-size: 1.1rem; color: var(--accent-deep); }

/* Toast */
#toast-container {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: var(--paper);
  border: 1px solid var(--border);
  color: var(--ink);
  padding: 10px 20px;
  border-radius: 20px;
  box-shadow: var(--shadow-md);
  font-size: 0.82rem;
  animation: toastIn 0.3s forwards, toastOut 0.3s 2.5s forwards;
}

@keyframes toastIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
@keyframes toastOut { to { opacity: 0; transform: translateY(-8px); } }

/* 回到顶部 */
#back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 42px;
  height: 42px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  cursor: pointer;
  z-index: 998;
  box-shadow: 0 4px 16px rgba(200, 137, 62, 0.35);
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
  transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

#back-to-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
#back-to-top:hover { transform: translateY(-3px) scale(1.05); box-shadow: 0 6px 20px rgba(200, 137, 62, 0.45); }

/* ===== 响应式 ===== */
@media (max-width: 1200px) { .masonry { column-count: 3; } }

@media (max-width: 768px) {
  .masonry { column-count: 2; column-gap: 10px; padding: 14px 12px 50px; }
  .card { margin-bottom: 10px; }
  .card-info { padding: 8px 10px 10px; }
  .card-remark { font-size: 0.78rem; }
  .card-meta { font-size: 0.68rem; }

  #topbar { padding: 8px 12px; }
  .topbar-title { font-size: 1rem; }
  .sort-tabs { display: none; }
  .search-box input { width: 90px; font-size: 0.75rem; }
  .btn-upload span { display: none; }
  .btn-upload { padding: 6px 8px; }

  .splash-title { font-size: 2.2rem; }
  .splash-sub { font-size: 0.85rem; }

  .modal-content { padding: 18px; }
  #back-to-top { bottom: 20px; right: 20px; width: 38px; height: 38px; }
}

@media (max-width: 480px) {
  .masonry { column-count: 2; column-gap: 8px; padding: 10px 8px 40px; }
  .card { margin-bottom: 8px; border-radius: 8px; }
  .card-info { padding: 6px 8px 8px; }
  .card-remark { font-size: 0.72rem; -webkit-line-clamp: 1; margin-bottom: 4px; }
  .card-meta { font-size: 0.62rem; }
  .card-time { font-size: 0.58rem; }
  .search-box { display: none; }
  .topbar-right { gap: 6px; }
}