:root {
  --color-page: #f3f5f7;
  --color-surface: #ffffff;
  --color-surface-muted: #f7f9fa;
  --color-border: #dce3e8;
  --color-border-strong: #becbd4;
  --color-text: #1f2d38;
  --color-text-muted: #6f7d87;
  --color-primary: #176b87;
  --color-primary-dark: #0f5369;
  --color-primary-soft: #e4f2f6;
  --color-success: #24734b;
  --color-success-soft: #e7f4eb;
  --color-warning: #9a6914;
  --color-warning-soft: #fff5dc;
  --shadow-soft: 0 2px 8px rgba(24, 43, 56, 0.06);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  color: var(--color-text);
  background: var(--color-page);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "PingFang SC",
    "Hiragino Sans GB",
    "Microsoft YaHei",
    sans-serif;
  line-height: 1.5;
}

body {
  min-width: 320px;
  margin: 0;
}

button,
a {
  font: inherit;
}

button {
  cursor: pointer;
}

.topbar {
  background: #162936;
  color: #ffffff;
  border-bottom: 1px solid #263e4c;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(100% - 32px, 1080px);
  min-height: 64px;
  margin: 0 auto;
}

.brand {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0;
}

.user {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #c9d8df;
  font-size: 14px;
}

.user strong {
  color: #ffffff;
  font-weight: 600;
}

.page {
  width: min(100% - 32px, 1080px);
  margin: 28px auto 56px;
}

.summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.metric {
  min-height: 92px;
  padding: 18px 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.metric strong {
  display: block;
  margin-bottom: 4px;
  color: var(--color-primary-dark);
  font-size: 28px;
  line-height: 1.1;
}

.metric span {
  color: var(--color-text-muted);
  font-size: 14px;
}

.puzzle-section,
.claim-panel {
  padding: 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.claim-panel {
  margin-top: 20px;
}

.panel-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.panel-heading h1,
.panel-heading h2 {
  margin: 0;
  color: var(--color-text);
  font-size: 21px;
  line-height: 1.25;
}

.panel-heading h2 {
  font-size: 18px;
}

.muted {
  color: var(--color-text-muted);
  font-size: 14px;
}

.piece-grid {
  display: grid;
  gap: 10px;
}

.piece-row {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: 10px;
}

.piece-button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-width: 0;
  min-height: 48px;
  padding: 8px 4px;
  color: var(--color-text);
  background: var(--color-surface-muted);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  transition:
    background-color 120ms ease,
    border-color 120ms ease,
    color 120ms ease,
    box-shadow 120ms ease;
}

.piece-button:hover {
  color: var(--color-primary-dark);
  background: var(--color-primary-soft);
  border-color: #83b8c8;
}

.piece-button:focus-visible,
.claim-link-button:focus-visible {
  outline: 3px solid rgba(23, 107, 135, 0.25);
  outline-offset: 2px;
}

.piece-button.is-selected {
  color: #ffffff;
  background: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(23, 107, 135, 0.14);
}

#claim-status {
  margin: 0 0 14px;
  color: var(--color-text-muted);
  font-size: 14px;
}

#claim-status.is-loading {
  color: var(--color-primary);
}

#claim-status.is-error {
  color: #a43d3d;
}

#claim-link-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--color-border);
}

.claim-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

.claim-item-main {
  min-width: 0;
}

.claim-item-title {
  margin: 0 0 5px;
  color: var(--color-text);
  font-size: 15px;
  font-weight: 600;
}

.claim-item-owner {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 13px;
}

.claim-link-button {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 8px 14px;
  color: #ffffff;
  background: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.claim-link-button:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

.claim-empty {
  padding: 24px 0;
  color: var(--color-text-muted);
  font-size: 14px;
  text-align: center;
}

.claim-notice {
  margin-top: 12px;
  padding: 10px 12px;
  color: var(--color-warning);
  background: var(--color-warning-soft);
  border: 1px solid #f0d999;
  border-radius: 6px;
  font-size: 13px;
}

noscript p {
  padding: 12px 16px;
  color: #7d5712;
  background: var(--color-warning-soft);
  border: 1px solid #f0d999;
  border-radius: 6px;
}

@media (max-width: 700px) {
  .topbar-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 2px;
    min-height: 76px;
  }

  .page {
    width: min(100% - 20px, 1080px);
    margin-top: 18px;
  }

  .summary {
    grid-template-columns: 1fr;
    gap: 8px;
    margin-bottom: 16px;
  }

  .metric {
    min-height: 76px;
    padding: 14px 16px;
  }

  .metric strong {
    display: inline-block;
    margin: 0 8px 0 0;
    font-size: 24px;
  }

  .puzzle-section,
  .claim-panel {
    padding: 16px 12px;
  }

  .panel-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 14px;
  }

  .piece-grid {
    gap: 7px;
  }

  .piece-row {
    gap: 5px;
  }

  .piece-button {
    min-height: 40px;
    padding: 6px 2px;
    font-size: 12px;
  }

  .claim-item {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .claim-link-button {
    width: 100%;
  }
}

@media (max-width: 390px) {
  .piece-button {
    min-height: 36px;
    font-size: 11px;
  }
}