:root {
  --bg: #f3f4f6;
  --panel: #ffffff;
  --panel-soft: #f9fafb;
  --border: #e5e7eb;
  --text: #111827;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-soft: #dbeafe;
  --shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", sans-serif;
}

img {
  display: block;
  max-width: 100%;
}

button,
input {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

.material-icons {
  font-family: "Material Icons";
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  direction: ltr;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "liga";
}

.app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 256px;
  padding: 24px;
  border-right: 1px solid var(--border);
  background: var(--panel-soft);
}

.brand {
  margin: 0 0 20px;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
}

.search-wrap {
  position: relative;
  margin-bottom: 18px;
}

.search-input {
  width: 100%;
  padding: 10px 14px 10px 40px;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  background: #fff;
  color: var(--text);
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: #9ca3af;
  pointer-events: none;
}

.sidebar-meta {
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 0.92rem;
}

.album-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.album-item {
  margin-bottom: 8px;
}

.album-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 10px 12px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: #374151;
  cursor: pointer;
  text-align: left;
  transition: background 140ms ease, color 140ms ease;
}

.album-button:hover {
  background: #e5e7eb;
}

.album-button.is-active {
  color: var(--accent);
  background: var(--accent-soft);
  font-weight: 500;
}

.album-button strong {
  font-weight: 500;
}

.album-button span {
  font-size: 0.86rem;
  color: var(--muted);
}

.main {
  display: flex;
  flex: 1;
  min-width: 0;
}

.gallery-section {
  flex: 1;
  min-width: 0;
  padding: 24px;
  overflow-y: auto;
}

.gallery-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.view-label {
  font-size: 0.92rem;
  color: var(--muted);
  font-weight: 500;
}

.view-icons {
  display: flex;
  gap: 8px;
  align-items: center;
}

.view-button {
  width: 38px;
  height: 38px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: #6b7280;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 140ms ease, color 140ms ease, border-color 140ms ease;
}

.view-button:hover {
  background: #e5e7eb;
}

.view-button.is-active {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: #bfdbfe;
}

.gallery {
  display: grid;
  gap: 16px;
}

.gallery.mode-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.gallery.mode-large {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.gallery.mode-list {
  grid-template-columns: 1fr;
}

.card {
  padding: 0;
  border: 0;
  border-radius: 12px;
  background: #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
  cursor: pointer;
  transition: transform 140ms ease, box-shadow 140ms ease, outline-color 140ms ease;
  outline: 3px solid transparent;
  outline-offset: -3px;
  text-align: left;
}

.card:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 34px rgba(17, 24, 39, 0.12);
}

.card.is-active {
  outline-color: var(--accent);
}

.card figure {
  position: relative;
  margin: 0;
}

.gallery.mode-list .card figure {
  display: flex;
  align-items: stretch;
}

.card img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.gallery.mode-list .card img {
  width: 128px;
  flex: 0 0 128px;
  aspect-ratio: 1 / 1;
}

.gallery.mode-large .card img {
  aspect-ratio: 4 / 3;
}

.card figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 18px 12px 10px;
  background: linear-gradient(to top, rgba(17, 24, 39, 0.75), transparent);
  color: #fff;
  font-size: 0.8rem;
}

.gallery.mode-list .card figcaption {
  position: static;
  flex: 1;
  padding: 14px 14px 12px;
  background: #fff;
  color: var(--text);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.card figcaption strong {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.gallery.mode-list .card figcaption strong {
  margin-bottom: 6px;
}

.card figcaption span {
  color: inherit;
  opacity: 0.9;
}

.empty-state {
  margin-bottom: 18px;
  padding: 20px;
  border: 1px dashed #d1d5db;
  border-radius: 12px;
  background: #fff;
  color: var(--muted);
}

.empty-state h3 {
  margin: 0 0 6px;
  color: var(--text);
  font-size: 1rem;
}

.inspector {
  width: 384px;
  padding: 24px;
  border-left: 1px solid var(--border);
  background: var(--panel);
  overflow-y: auto;
}

.preview-wrap {
  margin-bottom: 20px;
}

.preview-image {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 18px;
  box-shadow: var(--shadow);
  background: #f3f4f6;
}

.tab-row {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 18px;
}

.tab {
  padding: 10px 16px;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: #6b7280;
  cursor: pointer;
}

.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 500;
}

.tab-panels {
  min-height: 260px;
}

.tab-panel {
  display: block;
}

.detail-list h3,
.content-box h3 {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 500;
}

.detail-item {
  margin-bottom: 14px;
}

.detail-item p,
.content-box p {
  margin: 0;
  color: var(--text);
  word-break: break-word;
}

.content-box {
  margin-bottom: 16px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--panel-soft);
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.content-grid div,
.color-swatch {
  padding: 12px;
  border-radius: 14px;
  background: var(--panel-soft);
  border: 1px solid var(--border);
}

.content-grid span {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.84rem;
}

.content-grid strong {
  font-size: 0.96rem;
  font-weight: 600;
  word-break: break-word;
}

.color-palette {
  display: grid;
  gap: 12px;
}

.color-swatch {
  display: flex;
  align-items: center;
  gap: 12px;
}

.color-chip {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  border: 1px solid rgba(17, 24, 39, 0.08);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
  flex: 0 0 auto;
}

.color-swatch strong {
  display: block;
  margin-bottom: 4px;
}

.color-swatch span {
  display: block;
  color: var(--muted);
  font-size: 0.84rem;
}

.open-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  font-weight: 500;
  box-shadow: var(--shadow);
}

.open-link:hover {
  filter: brightness(1.03);
}

.hidden {
  display: none !important;
}

@media (min-width: 640px) {
  .gallery.mode-grid,
  .gallery.mode-large {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 768px) {
  .gallery.mode-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .gallery.mode-large {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .gallery.mode-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (max-width: 1200px) {
  .main {
    flex-direction: column;
  }

  .inspector {
    width: 100%;
    border-left: 0;
    border-top: 1px solid var(--border);
  }
}

@media (max-width: 900px) {
  .app {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .gallery-section {
    padding: 18px;
  }
}

@media (max-width: 640px) {
  .gallery.mode-grid,
  .gallery.mode-large {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .gallery.mode-list .card img {
    width: 104px;
    flex-basis: 104px;
  }

  .sidebar,
  .gallery-section,
  .inspector {
    padding: 16px;
  }

  .content-grid {
    grid-template-columns: 1fr;
  }
}