* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--cp-bg);
  color: var(--cp-text);
  font-family: "Segoe UI", Aptos, Calibri, -apple-system, BlinkMacSystemFont, sans-serif;
}

button,
input {
  font: inherit;
}

a {
  color: var(--cp-link);
}

.page-shell {
  position: relative;
  display: flex;
  flex-direction: column;
  width: min(920px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  padding: 72px 0 20px;
}

.utility-nav {
  position: absolute;
  top: 28px;
  right: 0;
  display: flex;
  justify-content: flex-end;
  font-size: 0.825rem;
}

.utility-nav a {
  position: relative;
  display: inline-flex;
  overflow: hidden;
  align-items: center;
  padding: 7px 12px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--cp-text-soft);
  letter-spacing: 0.015em;
  opacity: 0.62;
  text-decoration: none;
  transform: translateY(0);
  transition:
    color 260ms ease,
    opacity 260ms ease,
    letter-spacing 320ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 320ms cubic-bezier(0.22, 1, 0.36, 1),
    border-color 260ms ease,
    background-color 260ms ease,
    box-shadow 320ms ease;
  -webkit-backdrop-filter: blur(12px) saturate(120%);
  backdrop-filter: blur(12px) saturate(120%);
}

.utility-nav a::before {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    transparent 20%,
    var(--cp-sheen) 48%,
    transparent 76%
  );
  content: "";
  opacity: 0;
  pointer-events: none;
  transform: translateX(-90%);
  transition:
    opacity 220ms ease,
    transform 560ms cubic-bezier(0.22, 1, 0.36, 1);
}

.utility-nav a:hover,
.utility-nav a:focus-visible {
  border-color: var(--cp-sheen);
  background: var(--cp-panel);
  box-shadow:
    0 8px 24px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 var(--cp-sheen);
  color: var(--cp-text);
  letter-spacing: 0.045em;
  opacity: 0.92;
  outline: none;
  transform: translateY(-2px);
}

.utility-nav a:hover::before,
.utility-nav a:focus-visible::before {
  opacity: 0.72;
  transform: translateX(90%);
}

.utility-nav a:active {
  transform: translateY(0);
  transition-duration: 100ms;
}

@media (prefers-reduced-motion: reduce) {
  .utility-nav a,
  .utility-nav a::before {
    transition: none;
  }
}

.hero {
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--cp-accent);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

h1 {
  margin: 0;
  font-family: "Songti SC", "STSong", "Noto Serif CJK TC", serif;
  font-size: clamp(2.6rem, 9vw, 5.5rem);
  font-weight: 600;
  letter-spacing: 0.05em;
  line-height: 1;
}

h1::selection {
  background: transparent;
  color: var(--cp-accent);
}

.intro {
  max-width: 620px;
  margin: 36px 0 0;
  color: var(--cp-text-muted);
  font-size: 1.1rem;
  line-height: 1.7;
}

.search-panel {
  padding: 24px;
  border: 1px solid var(--cp-border);
  border-radius: 16px;
  background: var(--cp-surface);
  box-shadow: var(--cp-shadow);
}

.search-form label {
  display: block;
  margin-bottom: 8px;
  font-weight: 700;
}

.search-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
}

input {
  width: 100%;
  min-height: 52px;
  padding: 10px 16px;
  border: 1px solid var(--cp-border-strong);
  border-radius: 0.625rem;
  outline: none;
  background: var(--cp-bg-elevated);
  color: var(--cp-text);
  font-family: "Songti SC", "STSong", "Noto Serif CJK TC", serif;
  font-size: 1.5rem;
}

input:focus {
  border-color: var(--cp-accent);
  box-shadow: 0 0 0 3px var(--cp-accent-soft);
}

button {
  min-height: 52px;
  padding: 0 24px;
  border: 0;
  border-radius: 0.625rem;
  background: var(--cp-accent);
  color: var(--cp-accent-fg);
  cursor: pointer;
  font-weight: 700;
}

button:hover {
  background: var(--cp-accent-hover);
}

button:disabled {
  cursor: wait;
  opacity: 0.7;
}

.hint,
.status,
footer {
  color: var(--cp-text-muted);
}

.hint {
  margin: 10px 0 0;
  font-size: 0.875rem;
}

.status {
  min-height: 28px;
  margin: 24px 0 8px;
}

.status.error {
  color: var(--cp-danger);
}

.results {
  display: grid;
  gap: 16px;
  margin-bottom: 48px;
}

.result-card {
  display: grid;
  grid-template-columns: 104px 1fr;
  gap: 24px;
  padding: 24px;
  border: 1px solid var(--cp-border);
  border-radius: 16px;
  background: var(--cp-surface);
}

.result-card.is-supplemental {
  background: var(--cp-bg-elevated);
  box-shadow: inset 3px 0 0 var(--cp-accent);
}

.result-character {
  display: grid;
  width: 104px;
  height: 104px;
  place-items: center;
  border: 1px solid var(--cp-border);
  border-radius: 0.625rem;
  background: var(--cp-surface-soft);
  font-family: "Songti SC", "STSong", "Noto Serif CJK TC", serif;
  font-size: 3.75rem;
}

.result-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.tag {
  padding: 4px 9px;
  border-radius: 0.625rem;
  background: var(--cp-accent-soft);
  color: var(--cp-accent);
  font-size: 0.85rem;
  font-weight: 700;
}

.fanqie {
  margin: 0 0 12px;
  font-family: "Songti SC", "STSong", "Noto Serif CJK TC", serif;
  font-size: 1.4rem;
  font-weight: 700;
}

.definition {
  margin: 0;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.secondary {
  margin-top: 12px;
  color: var(--cp-text-soft);
  font-size: 0.875rem;
}

.source-scan {
  grid-column: 1 / -1;
  padding-top: 20px;
  border-top: 1px solid var(--cp-border);
}

.source-scan-heading {
  display: flex;
  align-items: end;
  gap: 16px;
  cursor: pointer;
  list-style: none;
}

.source-scan-heading::-webkit-details-marker {
  display: none;
}

.source-scan-heading::before {
  content: "";
  align-self: center;
  width: 0.625rem;
  height: 0.625rem;
  margin-left: 2px;
  border-right: 2px solid var(--cp-text-muted);
  border-bottom: 2px solid var(--cp-text-muted);
  transform: rotate(-45deg);
  transition: transform 160ms ease;
}

.source-scan[open] > .source-scan-heading::before {
  transform: rotate(45deg);
}

.source-scan-content {
  padding-top: 12px;
}

.source-scan-kicker {
  margin: 0 0 3px;
  color: var(--cp-accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.source-scan-title {
  margin: 0;
  font-family: "Songti SC", "STSong", "Noto Serif CJK TC", serif;
  font-size: 1.4rem;
  font-weight: 600;
}

.source-scan-frame {
  display: grid;
  min-height: 180px;
  margin: 0;
  border: 1px solid var(--cp-border);
  border-radius: 16px;
  background: var(--cp-bg-elevated);
  overflow: hidden;
}

.source-scan-loading,
.source-scan-image-link,
.source-scan-error {
  grid-area: 1 / 1;
}

.source-scan-loading {
  z-index: 1;
  display: grid;
  min-height: 180px;
  place-content: center;
  gap: 14px;
  padding: 32px;
  background:
    radial-gradient(circle at center, var(--cp-accent-soft), transparent 48%),
    var(--cp-bg-elevated);
  color: var(--cp-text-muted);
  font-family: Consolas, "Courier New", Courier, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-align: center;
  visibility: hidden;
  opacity: 0;
  transition:
    opacity 180ms ease,
    visibility 180ms ease;
}

.source-scan-content.is-loading .source-scan-loading {
  visibility: visible;
  opacity: 1;
}

.source-scan-loading-mark {
  position: relative;
  width: 52px;
  height: 52px;
  margin: 0 auto;
  border: 1px solid var(--cp-border-strong);
  border-radius: 10px;
  overflow: hidden;
}

.source-scan-loading-mark::before {
  position: absolute;
  top: 6px;
  right: 6px;
  left: 6px;
  height: 1px;
  background: var(--cp-accent);
  box-shadow: 0 0 10px var(--cp-accent);
  content: "";
  animation: source-scan-sweep 1.6s cubic-bezier(0.45, 0, 0.55, 1) infinite;
}

.source-scan-loading-mark::after {
  position: absolute;
  inset: 18px;
  border: 1px solid var(--cp-accent);
  border-radius: 3px;
  content: "";
}

.source-scan-image-link {
  display: grid;
  min-height: 180px;
  place-items: center;
  padding: 16px;
  transition: opacity 220ms ease;
}

.source-scan-content.is-loading .source-scan-image-link {
  visibility: hidden;
  opacity: 0;
}

.source-scan-image {
  display: block;
  width: min(100%, 760px);
  height: auto;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--cp-border);
  background: var(--cp-surface-soft);
  box-shadow: 0 0 2px var(--cp-border);
}

@keyframes source-scan-sweep {
  0%,
  100% {
    transform: translateY(0);
    opacity: 0.45;
  }

  50% {
    transform: translateY(39px);
    opacity: 1;
  }
}

.source-scan-error {
  align-self: center;
  margin: 0;
  padding: 32px;
  color: var(--cp-text-muted);
  text-align: center;
}

.source-scan-error a {
  color: var(--cp-link);
}

.source-scan-controls {
  display: grid;
  grid-template-columns: auto auto minmax(120px, 1fr) auto auto;
  gap: 8px;
  align-items: center;
  margin-top: 12px;
}

.scan-nav-button {
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--cp-border);
  background: var(--cp-surface);
  color: var(--cp-text);
  font-size: 0.8rem;
}

.scan-nav-button:hover:not(:disabled) {
  border-color: var(--cp-accent);
  background: var(--cp-accent-soft);
  color: var(--cp-accent);
}

.scan-nav-button:disabled {
  cursor: not-allowed;
  opacity: 0.42;
}

.source-scan-page {
  color: var(--cp-text-muted);
  font-family: Consolas, "Courier New", Courier, monospace;
  font-size: 0.8rem;
  text-align: center;
}

@media (prefers-reduced-motion: reduce) {
  .source-scan-loading-mark::before {
    animation: none;
    transform: translateY(19px);
  }
}

footer {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--cp-border);
  font-size: 0.72rem;
}

footer p {
  margin: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 640px) {
  .page-shell {
    padding-top: 40px;
  }

  .utility-nav {
    top: 0;
  }

  .search-row {
    grid-template-columns: 1fr;
  }

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

  .result-character {
    width: 80px;
    height: 80px;
    font-size: 2.8rem;
  }

  .source-scan-controls {
    grid-template-columns: repeat(4, 1fr);
  }

  .source-scan-page {
    grid-column: 1 / -1;
    grid-row: 1;
    padding-bottom: 2px;
  }

  .scan-nav-button {
    padding: 0 8px;
  }

}