:root {
  color-scheme: light;
  --bg-page: #ffffff;
  --bg-card: #f8fafc;
  --bg-elevated: #ffffff;
  --border: rgba(15, 23, 42, 0.1);
  --border-strong: rgba(20, 241, 149, 0.35);
  --text: #0f172a;
  --text-muted: #64748b;
  --accent: #0d9f6e;
  --accent-bright: #14f195;
  --accent-dim: rgba(13, 159, 110, 0.1);
  --violet: #6366f1;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 8px 32px rgba(15, 23, 42, 0.06);
  --font: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans KR",
    sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg-page);
  line-height: 1.5;
}

.page-bg,
.page-noise {
  display: none;
}

/* —— Header: centered mark + word, titles below —— */
.site-header {
  padding: 40px 20px 20px;
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
}

.site-header__hero {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 28px;
}

.brand-lockup {
  flex-shrink: 0;
  position: relative;
  display: flex;
  align-items: center;
}

/* SVG 마크(누끼) 또는 ?logo= 로 넘긴 래스터 */
.brand-mark-wrap {
  width: 52px;
  height: 46px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-logo {
  display: block;
  width: 48px;
  height: auto;
  max-height: 46px;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 0;
  box-shadow: none;
  background: transparent;
}

/* 흰 배경 PNG 등 커스텀 로고일 때만 배경 제거 느낌 */
.brand-logo--raster {
  width: 50px;
  max-height: 44px;
  object-fit: cover;
  object-position: center top;
  mix-blend-mode: multiply;
}

.brand-logo.is-hidden {
  display: none;
}

.brand-fallback {
  width: 52px;
  height: 46px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.04em;
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid var(--border);
}

.brand-word {
  font-size: clamp(1.85rem, 5.5vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  color: var(--text);
  line-height: 1;
  user-select: none;
}

.site-header__titles {
  max-width: 40rem;
  margin: 0 auto;
}

.site-header__eyebrow {
  margin: 0 0 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.95;
}

.site-header__title {
  margin: 0 0 12px;
  font-size: clamp(1.35rem, 3.8vw, 1.65rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--text);
}

.site-header__sub {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* —— Main —— */
.wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 8px 20px 72px;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}

.card--glass {
  background: var(--bg-card);
}

.card--upload {
  border-color: rgba(13, 159, 110, 0.22);
  background: linear-gradient(165deg, rgba(20, 241, 149, 0.06) 0%, #ffffff 48%);
}

.card__head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 16px;
  text-align: left;
}

.card__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid rgba(13, 159, 110, 0.25);
  flex-shrink: 0;
}

.card__lead {
  margin: 6px 0 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.upload-drop {
  padding: 16px;
  border-radius: var(--radius-sm);
  border: 1px dashed rgba(15, 23, 42, 0.15);
  background: rgba(248, 250, 252, 0.9);
}

.upload-status {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--text-muted);
}

.search-meta {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
}

.search-meta__hashes {
  margin-top: 10px;
  white-space: pre-wrap;
  word-break: break-all;
  font-size: 11px;
  line-height: 1.6;
  color: var(--text);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 12px;
  padding: 12px;
}

.search-meta__similar {
  margin-top: 14px;
}

.search-meta__list {
  margin: 8px 0 0;
  padding-left: 1.1rem;
  color: var(--text);
  font-size: 0.86rem;
  line-height: 1.55;
}

.search-meta__list li + li {
  margin-top: 6px;
}

.card--actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}

.ok {
  background: rgba(20, 241, 149, 0.18);
  color: #047857;
  border: 1px solid rgba(13, 159, 110, 0.35);
}

.warn {
  background: rgba(250, 204, 21, 0.15);
  color: #a16207;
  border: 1px solid rgba(202, 138, 4, 0.35);
}

.bad {
  background: rgba(248, 113, 113, 0.12);
  color: #b91c1c;
  border: 1px solid rgba(239, 68, 68, 0.28);
}

.grid {
  display: grid;
  gap: 14px 18px;
  grid-template-columns: 1fr;
  text-align: left;
}

@media (min-width: 640px) {
  .grid {
    grid-template-columns: 1fr 1fr;
  }
  .field--wide {
    grid-column: 1 / -1;
  }
}

.field {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: rgba(248, 250, 252, 0.95);
  border: 1px solid rgba(15, 23, 42, 0.06);
}

.label {
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}

.label--section {
  margin-bottom: 14px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--text-muted);
}

.value {
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  word-break: break-word;
}

.value--hash {
  font-size: 12px;
  line-height: 1.55;
}

.media-frame {
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #f1f5f9;
  min-height: 120px;
  position: relative;
}

.img {
  width: 100%;
  display: block;
  vertical-align: middle;
}

.media-frame__empty {
  padding: 28px 16px;
  text-align: center;
  margin: 0;
}

.mono {
  font-family: var(--mono);
}

.empty {
  color: var(--text-muted);
}

.monitor-alert {
  margin: 0 0 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(202, 138, 4, 0.35);
  background: rgba(254, 243, 199, 0.35);
  color: #92400e;
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.55;
  text-align: left;
}

/* Merkle path (client verify) */
.card--merkle {
  text-align: left;
}

.merkle-intro {
  margin: 0 0 16px;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.merkle-pending {
  margin: 0;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: rgba(241, 245, 249, 0.95);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

.merkle-grid {
  margin-bottom: 14px;
}

.merkle-details {
  margin: 14px 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  padding: 10px 14px;
  background: rgba(248, 250, 252, 0.6);
}

.merkle-details summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text);
}

.merkle-proof-list {
  margin: 12px 0 4px;
  padding-left: 1.25rem;
  font-size: 11px;
  line-height: 1.65;
  word-break: break-all;
}

.merkle-proof-list li {
  margin-bottom: 6px;
}

.merkle-actions {
  margin-top: 16px;
  padding-top: 4px;
}

.merkle-verify-result {
  margin: 10px 0 0;
  font-size: 0.88rem;
  line-height: 1.5;
  min-height: 1.25em;
}

.merkle-verify-result.is-ok {
  color: #047857;
  font-weight: 600;
}

.merkle-verify-result.is-bad {
  color: #b91c1c;
  font-weight: 600;
}

.merkle-verify-result.is-muted {
  color: var(--text-muted);
}

.merkle-local-file {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.merkle-local-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 8px;
}

.merkle-file-input {
  flex: 1;
  min-width: 180px;
  font-size: 13px;
  font-family: var(--font);
}

.merkle-chain-panel {
  margin-bottom: 18px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(13, 159, 110, 0.25);
  background: rgba(20, 241, 149, 0.06);
}

.merkle-tree-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 14px;
}

@media (min-width: 720px) {
  .merkle-tree-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.merkle-tree-card {
  padding: 14px;
  border-radius: 14px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  background: rgba(255, 255, 255, 0.7);
}

.merkle-tree-meta {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-muted);
}

.merkle-anchor-card {
  margin-top: 6px;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid rgba(49, 130, 246, 0.18);
  background: rgba(49, 130, 246, 0.05);
}

.merkle-anchor-payload {
  margin: 8px 0 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 11px;
  line-height: 1.55;
  color: var(--text);
}

.merkle-anchor-link {
  display: inline-flex;
  margin-top: 12px;
}

.merkle-chain-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 12px;
}

.merkle-chain-note {
  margin: 12px 0 0;
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--text-muted);
}

/* Merkle path tree (root at top — SPV path reconstruction) */
.merkle-viz {
  margin: 0 0 20px;
  padding: 16px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(49, 130, 246, 0.22);
  background: linear-gradient(165deg, rgba(49, 130, 246, 0.07) 0%, rgba(248, 250, 252, 0.9) 100%);
}

.merkle-viz__title {
  margin: 0 0 14px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.merkle-viz__loading {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.merkle-viz__row {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
}

.merkle-viz__row + .merkle-viz__row {
  margin-top: 4px;
}

.merkle-viz__node {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.04);
}

.merkle-viz__node--root {
  border-color: rgba(13, 159, 110, 0.45);
  background: rgba(20, 241, 149, 0.1);
}

.merkle-viz__node--leaf {
  border-color: rgba(49, 130, 246, 0.35);
  background: rgba(49, 130, 246, 0.06);
}

.merkle-viz__badge {
  flex: 0 0 auto;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--text);
  color: #fff;
}

.merkle-viz__node--root .merkle-viz__badge {
  background: #0d9f6e;
}

.merkle-viz__node--leaf .merkle-viz__badge {
  background: #3182f6;
}

.merkle-viz__hash {
  flex: 1 1 200px;
  margin: 0;
  font-size: 11px;
  line-height: 1.45;
  word-break: break-all;
  color: var(--text);
  font-family: var(--mono);
}

.merkle-viz__match {
  margin: 0 0 12px;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
}

.merkle-viz__match--ok {
  background: rgba(20, 241, 149, 0.15);
  color: #047857;
  border: 1px solid rgba(13, 159, 110, 0.25);
}

.merkle-viz__match--bad {
  background: rgba(248, 113, 113, 0.12);
  color: #b91c1c;
  border: 1px solid rgba(220, 38, 38, 0.2);
}

.merkle-viz__connector {
  display: flex;
  justify-content: center;
  padding: 2px 0 6px;
  color: var(--text-muted);
  font-size: 1.1rem;
  line-height: 1;
  user-select: none;
}

.merkle-viz__step {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  padding: 8px 10px;
  margin-left: 8px;
  border-left: 2px solid rgba(49, 130, 246, 0.35);
  padding-left: 14px;
  margin-bottom: 4px;
}

.merkle-viz__step-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  width: 100%;
}

.merkle-viz__sibling {
  font-size: 10px;
  font-family: var(--mono);
  padding: 6px 8px;
  border-radius: 8px;
  background: rgba(241, 245, 249, 0.95);
  border: 1px dashed var(--border);
  word-break: break-all;
  max-width: 100%;
}

.merkle-viz__pos {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-secondary);
  white-space: nowrap;
}

.merkle-viz__child-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
  width: 100%;
  margin-top: 2px;
}

.upload-row--wallet {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 4px;
}

.upload-row--wallet .btn {
  flex: 0 0 auto;
}

.lookup-divider {
  margin: 18px 0 12px;
  text-align: center;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.lookup-token-label {
  margin-bottom: 4px;
}

.lookup-token-help {
  margin: 0 0 12px;
  font-size: 0.88rem;
}

/* Buttons & inputs */
.btn {
  background: #f1f5f9;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 11px 18px;
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  font-family: var(--font);
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.btn:hover:not(:disabled) {
  background: #e2e8f0;
  border-color: rgba(15, 23, 42, 0.14);
}

.btn:active:not(:disabled) {
  transform: scale(0.98);
}

.btn-primary {
  background: linear-gradient(135deg, #14f195 0%, #0d9f6e 100%);
  color: #04120e;
  border: 1px solid rgba(255, 255, 255, 0.35);
  box-shadow: 0 4px 18px rgba(20, 241, 149, 0.22);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #2ef7a4 0%, #14f195 100%);
  border-color: rgba(255, 255, 255, 0.45);
}

.btn-outline {
  background: transparent;
  border-color: rgba(13, 159, 110, 0.4);
  color: #047857;
}

.btn-outline:hover:not(:disabled) {
  background: var(--accent-dim);
  border-color: var(--accent);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

.upload-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.upload-row--actions {
  margin-top: 12px;
}

.file-input {
  flex: 1;
  min-width: 200px;
  color: var(--text);
  font-size: 14px;
  font-family: var(--font);
}

.file-input::file-selector-button {
  margin-right: 12px;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text);
  font-family: var(--font);
  font-weight: 500;
  cursor: pointer;
}

.text-input {
  flex: 1;
  min-width: 200px;
  background: #ffffff;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  font-size: 14px;
  font-family: var(--mono);
}

.text-input::placeholder {
  color: rgba(100, 116, 139, 0.75);
}

.text-input:focus,
.btn:focus-visible {
  outline: 2px solid rgba(20, 241, 149, 0.45);
  outline-offset: 2px;
}

.file-input:disabled,
.text-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}