/* === Reset & Base === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-bg-heavy: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  --glass-shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
  --glass-blur: 20px;
  --glass-blur-heavy: 40px;
  --color-text: #1A1A1A;
  --color-text-secondary: #666666;
  --color-accent: #007AFF;
  --radius: 16px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: linear-gradient(135deg, #E8F0FE 0%, #F0E6F6 25%, #E6F0F8 50%, #F6E6EE 75%, #E8F0FE 100%);
  background-attachment: fixed;
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

/* === Header === */
.header {
  text-align: center;
  padding: 60px 20px 30px;
}

.header__title {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 8px;
  background: linear-gradient(135deg, #1A1A1A 0%, #444 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header__subtitle {
  font-size: 1rem;
  color: var(--color-text-secondary);
  font-weight: 400;
}

/* === Filters === */
.filters {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
}

.filters__btn {
  padding: 8px 20px;
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--color-text);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.filters__btn:hover {
  background: var(--glass-bg-heavy);
  border-color: rgba(0,0,0,0.1);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.filters__btn:active {
  transform: scale(0.97);
}

.filters__btn--active {
  background: rgba(0, 122, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: white;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.3);
}

.filters__separator {
  color: rgba(0,0,0,0.15);
  line-height: 2.2;
}

/* === Sub-filters === */
.sub-filters {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 8px 20px 16px;
  flex-wrap: wrap;
}

.sub-filters__btn {
  padding: 6px 16px;
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.sub-filters__btn:hover,
.sub-filters__btn--active {
  background: var(--glass-bg-heavy);
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.15);
}

/* === Gallery Grid === */
.gallery {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px 60px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

/* === Card === */
.card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--glass-shadow);
  cursor: pointer;
  transition: all var(--transition);
  animation: fadeIn 0.4s ease-out both;
}

.card:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: var(--glass-shadow-lg);
  border-color: rgba(255,255,255,0.3);
}

.card:active {
  transform: translateY(-2px) scale(0.99);
}

.card--hidden {
  display: none;
}

.card__img-wrap {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: rgba(0,0,0,0.03);
}

.card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.card:hover .card__img {
  transform: scale(1.08);
}

.card__body {
  padding: 16px;
}

.card__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
  line-height: 1.4;
}

.card__meta {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  display: flex;
  gap: 12px;
}

.card__badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 10px;
  font-size: 0.75rem;
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  color: var(--color-text-secondary);
  margin-top: 8px;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* === Lightbox === */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.3s ease-out;
}

.lightbox__close,
.lightbox__prev,
.lightbox__next {
  position: absolute;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  color: white;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 1001;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  font-family: inherit;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.lightbox__close:hover,
.lightbox__prev:hover,
.lightbox__next:hover {
  background: rgba(255,255,255,0.3);
  transform: scale(1.1);
}

.lightbox__close:active,
.lightbox__prev:active,
.lightbox__next:active {
  transform: scale(0.95);
}

.lightbox__close {
  top: 20px;
  right: 20px;
}

.lightbox__prev {
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox__prev:hover {
  transform: translateY(-50%) scale(1.1);
}

.lightbox__next {
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox__next:hover {
  transform: translateY(-50%) scale(1.1);
}

.lightbox__content {
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox__img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
  user-select: none;
  -webkit-user-drag: none;
  box-shadow: 0 16px 64px rgba(0,0,0,0.3);
}

.lightbox__info {
  color: white;
  text-align: center;
  margin-top: 16px;
  max-width: 600px;
  padding: 12px 24px;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
}

.lightbox__info h3 {
  font-size: 1.2rem;
  margin-bottom: 4px;
}

.lightbox__info p {
  font-size: 0.9rem;
  opacity: 0.8;
}

/* === Article Reader === */
.reader {
  position: fixed;
  inset: 0;
  background: var(--glass-bg-heavy);
  backdrop-filter: blur(var(--glass-blur-heavy));
  -webkit-backdrop-filter: blur(var(--glass-blur-heavy));
  z-index: 1000;
  overflow-y: auto;
  animation: slideUp 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reader__close {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 1.3rem;
  cursor: pointer;
  z-index: 1001;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--glass-shadow);
  transition: all var(--transition);
  font-family: inherit;
}

.reader__close:hover {
  background: rgba(255,255,255,0.6);
  transform: scale(1.1);
}

.reader__close:active {
  transform: scale(0.95);
}

.reader__content {
  max-width: 680px;
  margin: 0 auto;
  padding: 80px 24px 60px;
  font-size: 1.1rem;
  line-height: 1.8;
}

.reader__content h1 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.reader__content .reader__date {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 40px;
  display: block;
}

.reader__content p {
  margin-bottom: 1.2em;
}

.reader__content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 24px 0 12px;
}

.reader__content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 20px 0 10px;
}

.reader__content ul,
.reader__content ol {
  padding-left: 24px;
  margin-bottom: 1.2em;
}

.reader__content li {
  margin-bottom: 0.4em;
}

.reader__content strong {
  font-weight: 600;
}

.reader__content em {
  font-style: italic;
}

@keyframes slideUp {
  from { transform: translateY(100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* === FAB (Floating Action Button) === */
.fab {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow-lg);
  color: var(--color-accent);
  font-size: 28px;
  cursor: pointer;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-bounce);
  font-family: inherit;
}

.fab:hover {
  transform: scale(1.1) rotate(90deg);
  box-shadow: 0 8px 32px rgba(0, 122, 255, 0.25);
  background: rgba(0, 122, 255, 0.1);
}

.fab:active {
  transform: scale(0.95) rotate(90deg);
}

/* === Add Panel (Modal) === */
.add-panel {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: fadeIn 0.2s ease-out;
}

.add-panel__card {
  width: 90%;
  max-width: 520px;
  max-height: 85vh;
  overflow-y: auto;
  background: var(--glass-bg-heavy);
  backdrop-filter: blur(var(--glass-blur-heavy));
  -webkit-backdrop-filter: blur(var(--glass-blur-heavy));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow-lg);
  padding: 32px;
  animation: scaleIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes scaleIn {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.add-panel__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.add-panel__title {
  font-size: 1.3rem;
  font-weight: 600;
}

.add-panel__close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.add-panel__close:hover {
  background: rgba(255,0,0,0.1);
  border-color: rgba(255,0,0,0.2);
  color: #FF3B30;
}

/* === Upload Zone === */
.upload-zone {
  border: 2px dashed rgba(0,0,0,0.12);
  border-radius: var(--radius-sm);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: rgba(0,0,0,0.02);
  margin-bottom: 20px;
}

.upload-zone:hover,
.upload-zone--active {
  border-color: var(--color-accent);
  background: rgba(0, 122, 255, 0.04);
}

.upload-zone__icon {
  font-size: 2rem;
  margin-bottom: 8px;
  opacity: 0.5;
}

.upload-zone__text {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.upload-zone__hint {
  font-size: 0.75rem;
  color: rgba(0,0,0,0.3);
  margin-top: 4px;
}

/* === Image Preview Grid === */
.upload-preview {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.upload-preview__item {
  position: relative;
  width: 80px;
  height: 80px;
  border-radius: var(--radius-xs);
  overflow: hidden;
  border: 2px solid var(--glass-border);
}

.upload-preview__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.upload-preview__remove {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(255,59,48,0.85);
  color: white;
  border: none;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s;
}

.upload-preview__item:hover .upload-preview__remove {
  opacity: 1;
}

/* === Form Fields === */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--color-text);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xs);
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--color-text);
  transition: all var(--transition);
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

/* === Tab Switcher (Drawing/Article) === */
.tab-switcher {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: rgba(0,0,0,0.04);
  border-radius: var(--radius-xs);
  margin-bottom: 20px;
}

.tab-switcher__btn {
  flex: 1;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  background: transparent;
  font-size: 0.9rem;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
  color: var(--color-text-secondary);
}

.tab-switcher__btn--active {
  background: white;
  color: var(--color-text);
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

/* === Rich Text Editor === */
.rich-editor {
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xs);
  overflow: hidden;
  background: white;
  transition: border-color var(--transition);
}

.rich-editor:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}

.rich-editor__toolbar {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 6px 8px;
  background: rgba(0,0,0,0.03);
  border-bottom: 1px solid var(--glass-border);
  flex-wrap: wrap;
}

.rich-editor__btn {
  padding: 5px 10px;
  border: none;
  border-radius: 4px;
  background: transparent;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
  color: var(--color-text);
  min-width: 32px;
  text-align: center;
}

.rich-editor__btn:hover {
  background: rgba(0,0,0,0.08);
}

.rich-editor__btn:active {
  background: rgba(0,0,0,0.12);
  transform: scale(0.95);
}

.rich-editor__btn--active {
  background: rgba(0, 122, 255, 0.12);
  color: var(--color-accent);
}

.rich-editor__sep {
  width: 1px;
  height: 20px;
  background: rgba(0,0,0,0.1);
  margin: 0 4px;
}

.rich-editor__content {
  min-height: 200px;
  max-height: 400px;
  padding: 14px;
  font-size: 0.95rem;
  line-height: 1.7;
  outline: none;
  color: var(--color-text);
  overflow-y: auto;
}

.rich-editor__content:empty::before {
  content: attr(data-placeholder);
  color: rgba(0,0,0,0.3);
  pointer-events: none;
}

.rich-editor__content h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 16px 0 8px;
}

.rich-editor__content h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 12px 0 6px;
}

.rich-editor__content p {
  margin-bottom: 8px;
}

.rich-editor__content ul,
.rich-editor__content ol {
  padding-left: 24px;
  margin-bottom: 8px;
}

.rich-editor__content li {
  margin-bottom: 4px;
}

/* === Action Buttons === */
.btn-primary {
  width: 100%;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-xs);
  background: var(--color-accent);
  color: white;
  font-size: 1rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 122, 255, 0.4);
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  width: 100%;
  padding: 10px 20px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xs);
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--color-text);
  font-size: 0.9rem;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
  margin-top: 8px;
}

.btn-secondary:hover {
  background: var(--glass-bg-heavy);
}

/* === Export Panel === */
.export-panel {
  position: fixed;
  bottom: 100px;
  right: 32px;
  background: var(--glass-bg-heavy);
  backdrop-filter: blur(var(--glass-blur-heavy));
  -webkit-backdrop-filter: blur(var(--glass-blur-heavy));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--glass-shadow-lg);
  padding: 12px;
  z-index: 99;
  display: none;
  animation: scaleIn 0.2s ease-out;
}

.export-panel__btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 10px 16px;
  border: none;
  border-radius: var(--radius-xs);
  background: transparent;
  font-size: 0.9rem;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
}

.export-panel__btn:hover {
  background: rgba(0,0,0,0.05);
}

/* === Responsive === */
@media (max-width: 768px) {
  .header { padding: 40px 16px 20px; }
  .header__title { font-size: 1.6rem; }
  .gallery {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
    padding: 0 12px 40px;
  }
  .card__body { padding: 12px; }
  .card__title { font-size: 0.9rem; }
  .lightbox__prev, .lightbox__next { width: 40px; height: 40px; font-size: 1.2rem; }
  .reader__content { padding: 60px 16px 40px; font-size: 1rem; }
  .fab { bottom: 24px; right: 24px; width: 50px; height: 50px; font-size: 24px; }
  .add-panel__card { padding: 24px; width: 95%; }
  .export-panel { right: 24px; bottom: 90px; }
}

@media (max-width: 480px) {
  .gallery {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }
}