:root {
  --ink: #183c35;
  --muted: #687a76;
  --primary: #0f8069;
  --primary-dark: #096451;
  --line: #dce8e3;
}

html {
  min-height: 100%;
  font-size: 15px;
}

body {
  min-height: 100vh;
  color: var(--ink);
  background: #f5f8f5 radial-gradient(circle at 20% 0, #fff4d8 0, transparent 38%);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 .22rem rgba(15, 128, 105, .2);
}

.btn-primary {
  --bs-btn-bg: var(--primary);
  --bs-btn-border-color: var(--primary);
  --bs-btn-hover-bg: var(--primary-dark);
  --bs-btn-hover-border-color: var(--primary-dark);
}

.site-header {
  border-bottom: 1px solid rgba(24, 60, 53, .09);
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(12px);
}

.brand-mark {
  display: grid;
  width: 2.2rem;
  height: 2.2rem;
  place-items: center;
  border-radius: .75rem;
  color: white;
  background: var(--primary);
}

.user-name {
  color: var(--muted);
  font-size: .92rem;
}

.page-container {
  min-height: calc(100vh - 132px);
  padding-top: 2.5rem;
  padding-bottom: 3rem;
}

.site-footer {
  padding: 1.3rem 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, .72);
  font-size: .9rem;
}

.hero-panel, .content-card, .auth-card {
  border: 1px solid rgba(24, 60, 53, .09);
  background: rgba(255, 253, 248, .96);
  box-shadow: 0 18px 50px rgba(40, 72, 62, .08);
}

.hero-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: clamp(1.7rem, 4vw, 3.4rem);
  border-radius: 1.5rem;
}

.hero-panel h1 {
  max-width: 720px;
  margin: .5rem 0 .8rem;
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 850;
  line-height: 1.12;
}

.hero-panel p {
  max-width: 660px;
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.eyebrow {
  color: var(--primary);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.content-card {
  padding: 1.5rem;
  border-radius: 1.25rem;
}

.content-card h2 {
  margin: 0;
  font-size: 1.18rem;
  font-weight: 800;
}

.page-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.7rem;
}

.page-heading h1 {
  margin: .35rem 0;
  font-weight: 850;
}

.page-heading p {
  margin: 0;
  color: var(--muted);
}

.empty-panel {
  display: grid;
  min-height: 180px;
  place-content: center;
  gap: .45rem;
  border: 1px dashed #bfd0ca;
  border-radius: 1rem;
  color: var(--muted);
  text-align: center;
}

.empty-panel strong {
  color: var(--ink);
  font-size: 1.08rem;
}

.workflow-list {
  display: grid;
  gap: .9rem;
  margin: 1.25rem 0 0;
  padding-left: 1.5rem;
  color: var(--muted);
}

.card-set-grid, .flash-card-list {
  display: grid;
  gap: 1rem;
}

.card-set-item, .flash-card-row {
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: white;
}

.card-set-item {
  display: grid;
  gap: 1rem;
  padding: 1.2rem;
}

.card-set-item h3 {
  margin: 0 0 .4rem;
  font-size: 1.12rem;
  font-weight: 800;
}

.card-set-item p {
  margin: 0;
  color: var(--muted);
}

.card-authoring-workspace {
  display: grid;
  grid-template-columns: minmax(280px, .78fr) minmax(0, 1.35fr);
  gap: 1.25rem;
  align-items: start;
}

.card-browser {
  position: sticky;
  top: 1.25rem;
  max-height: calc(100vh - 2.5rem);
  overflow: auto;
}

.card-browser-heading, .card-detail-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.flash-card-list {
  gap: .65rem;
}

.flash-card-list-item {
  display: grid;
  gap: .55rem;
  width: 100%;
  padding: .65rem;
  border: 1px solid var(--line);
  border-radius: .9rem;
  color: var(--ink);
  background: white;
  cursor: pointer;
}

.flash-card-list-item:hover, .flash-card-list-item.active {
  border-color: var(--primary);
  background: #eef8f4;
}

.flash-card-list-select {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  align-items: center;
  gap: .75rem;
  width: 100%;
  padding: .15rem;
  border: 0;
  color: inherit;
  background: transparent;
  text-align: left;
}

.flash-card-list-select:focus-visible {
  border-radius: .65rem;
  outline: .2rem solid rgba(15, 128, 105, .25);
}

.flash-card-list-actions {
  display: flex;
  justify-content: flex-end;
  gap: .4rem;
  padding-top: .55rem;
  border-top: 1px solid var(--line);
}

.flash-card-list-actions .btn {
  padding: .2rem .5rem;
  font-size: .75rem;
}

.flash-card-list-item .card-order {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border-radius: .7rem;
  color: var(--primary);
  background: #dff1eb;
  font-weight: 800;
}

.flash-card-list-copy {
  min-width: 0;
}

.flash-card-list-copy strong, .flash-card-list-copy span {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.flash-card-list-copy span {
  margin-top: .2rem;
  color: var(--muted);
  font-size: .82rem;
}

.card-detail-panel {
  min-height: 520px;
}

.card-detail-empty {
  display: grid;
  min-height: 420px;
  place-content: center;
  gap: .45rem;
  color: var(--muted);
  text-align: center;
}

.card-detail-empty strong {
  color: var(--ink);
  font-size: 1.15rem;
}

.card-image-editor {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: #f8fbf9;
}

.card-image-editor h3 {
  margin: 0 0 .35rem;
  font-size: 1rem;
  font-weight: 800;
}

.card-image-preview {
  display: grid;
  min-height: 220px;
  place-items: center;
  overflow: hidden;
  border: 1px dashed #bfd0ca;
  border-radius: .85rem;
  background: white;
}

.card-image-preview img {
  display: block;
  width: 100%;
  max-height: 420px;
  object-fit: contain;
}

.card-image-placeholder {
  color: var(--muted);
}

.card-image-source {
  margin-top: .75rem;
  color: var(--muted);
  font-size: .85rem;
}

.wikimedia-search,
.candidate-image-tool {
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.wikimedia-candidates,
.candidate-image-grid {
  display: grid;
  gap: .75rem;
}

.wikimedia-candidates {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.wikimedia-candidate,
.candidate-image-card {
  display: grid;
  align-content: start;
  gap: .65rem;
  padding: .75rem;
  border: 1px solid var(--line);
  border-radius: .85rem;
  background: white;
}

.wikimedia-candidate img,
.candidate-image-card img {
  width: 100%;
  border-radius: .6rem;
  background: #f1f5f3;
  object-fit: contain;
}

.wikimedia-candidate img {
  aspect-ratio: 4 / 3;
}

.candidate-image-card img {
  aspect-ratio: 16 / 9;
}

.wikimedia-candidate-summary,
.candidate-image-summary {
  min-height: 2.5rem;
  overflow-wrap: anywhere;
  color: var(--muted);
  font-size: .8rem;
}

.bulk-card-rows {
  display: grid;
  gap: 1rem;
}

.bulk-card-row {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: .9rem;
  background: #f8fbfa;
}

.bulk-card-row-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: .75rem;
}

.bulk-card-image {
  min-height: 2.5rem;
  color: var(--muted);
  font-size: .85rem;
}

.bulk-card-preview {
  width: 160px;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: .65rem;
  background: #eef3f1;
  object-fit: contain;
}

@media (max-width: 767.98px) {
  .wikimedia-candidates,
  .candidate-image-grid {
    grid-template-columns: 1fr;
  }
}

.card-editor-message {
  margin-bottom: 1rem;
  padding: .75rem 1rem;
  border-radius: .75rem;
  color: #7c2d12;
  background: #ffedd5;
}

.card-editor-message.success {
  color: #0f5132;
  background: #d1e7dd;
}

.auth-shell {
  display: grid;
  min-height: calc(100vh - 210px);
  place-items: center;
}

.auth-card {
  width: min(460px, 100%);
  padding: clamp(1.8rem, 5vw, 3rem);
  border-radius: 1.4rem;
}

.auth-card h1 {
  margin: .55rem 0;
  font-weight: 850;
}

.form-control {
  border-color: #cbd9d4;
}

@media (max-width: 700px) {
  .hero-panel {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-panel .btn {
    width: 100%;
  }

  .user-name {
    display: none;
  }

  .page-heading, .card-browser-heading, .card-detail-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .card-authoring-workspace {
    grid-template-columns: 1fr;
  }

  .card-browser {
    position: static;
    max-height: none;
  }

  .card-detail-panel {
    min-height: auto;
  }
}