/* RemzarScan — single-page explorer */

:root {
  color-scheme: light;

  --background: #f5f7fa;
  --surface: #ffffff;
  --surface-muted: #f8fafc;
  --text: #172033;
  --muted: #526176;
  --border: #dce3ec;
  --accent: #174ea6;
  --accent-hover: #123d82;
  --focus: #2563eb;

  --success: #17633b;
  --success-background: #edf8f1;
  --warning: #805300;
  --warning-background: #fff8e6;
  --danger: #a12626;
  --danger-background: #fff1f1;

  --radius: 10px;
  --mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono",
    monospace;

  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

/* Foundation */

*,
*::before,
*::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-width: 0;
  background: var(--background);
  color: var(--text);
}

button,
input,
select {
  font: inherit;
}

button,
input,
select,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--accent-hover);
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

h1,
h2,
h3,
h4,
p,
dl {
  margin: 0;
}

h1 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.035em;
}

h2 {
  font-size: 1.15rem;
  line-height: 1.35;
  letter-spacing: -0.015em;
}

h3 {
  font-size: 1rem;
}

h4 {
  font-size: 0.95rem;
}

p {
  overflow-wrap: anywhere;
}

code {
  font-family: var(--mono);
  font-size: 0.85rem;
}

.container {
  width: min(1200px, calc(100% - 48px));
  margin-inline: auto;
}

.muted {
  color: var(--muted);
  font-size: 0.875rem;
}

.numeric {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 12px 18px;
  transform: translateY(-200%);
  border-radius: 6px;
  background: var(--text);
  color: #ffffff;
}

.skip-link:focus {
  transform: translateY(0);
  color: #ffffff;
}

/* Header */

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 88px;
  padding-block: 16px;
}

.brand {
  display: flex;
  flex-direction: column;
  color: var(--text);
  text-decoration: none;
}

.brand:hover {
  color: var(--text);
}

.brand-name {
  font-size: 1.4rem;
  font-weight: 750;
  letter-spacing: -0.04em;
}

.brand-description {
  color: var(--muted);
  font-size: 0.8rem;
}

.website-link {
  padding-block: 10px;
  font-size: 0.875rem;
  font-weight: 600;
}

/* Main layout */

main.container {
  display: grid;
  gap: 28px;
  padding-block: 36px 48px;
}

.overview,
.search-section,
.blocks-section {
  min-width: 0;
}

.section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 20px;
}

.section-heading > *,
.refresh-controls > * {
  min-width: 0;
}

.section-heading h1 + p,
.section-heading h2 + p {
  margin-top: 8px;
}

/* Connection and notices */

.connection-status {
  flex-shrink: 0;
  text-align: right;
}

.connection-status > p {
  margin-top: 8px;
  font-size: 0.8rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 11px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 650;
}

.status-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 8px;
  border-radius: 50%;
  background: currentColor;
}

/* app.js sets data-state and a matching visible text label. */

.status-badge[data-state="connected"],
.status-badge[data-state="live"] {
  border-color: #b9ddc8;
  background: var(--success-background);
  color: var(--success);
}

.status-badge[data-state="stale"],
.status-badge[data-state="connecting"] {
  border-color: #e6d49d;
  background: var(--warning-background);
  color: var(--warning);
}

.status-badge[data-state="offline"],
.status-badge[data-state="error"] {
  border-color: #ebc4c4;
  background: var(--danger-background);
  color: var(--danger);
}

.notice {
  margin-block: 16px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  background: var(--surface);
  font-size: 0.875rem;
  overflow-wrap: anywhere;
}

.notice-warning {
  border-color: #e6d49d;
  border-left-color: var(--warning);
  background: var(--warning-background);
  color: var(--warning);
}

.notice-error {
  border-color: #ebc4c4;
  border-left-color: var(--danger);
  background: var(--danger-background);
  color: var(--danger);
}

/* Chain summary */

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.summary-card {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.summary-card dt {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
}

.summary-card dd {
  margin: 0;
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.025em;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

#latest-block-time {
  display: block;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: normal;
}

.summary-note {
  margin-top: 12px;
  font-size: 0.8rem;
}

/* Forms and buttons */

.search-section {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.search-form {
  margin-top: 16px;
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
}

.search-form > label {
  margin-bottom: 8px;
}

.search-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

input,
select {
  min-height: 44px;
  max-width: 100%;
  padding: 10px 12px;
  border: 1px solid #aab7c7;
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
}

input {
  width: 100%;
  min-width: 0;
}

input::placeholder {
  color: var(--muted);
  opacity: 1;
}

input[aria-invalid="true"] {
  border-color: var(--danger);
}

select {
  cursor: pointer;
}

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: #ffffff;
  font-size: 0.875rem;
  font-weight: 650;
  line-height: 1.3;
  text-align: center;
  cursor: pointer;
}

button:hover:not(:disabled) {
  border-color: var(--accent-hover);
  background: var(--accent-hover);
}

.button-secondary,
.copy-button {
  border-color: #aab7c7;
  background: var(--surface);
  color: var(--text);
}

.button-secondary:hover:not(:disabled),
.copy-button:hover:not(:disabled) {
  border-color: var(--accent);
  background: #eef4fc;
  color: var(--accent);
}

button:disabled,
select:disabled {
  border-color: var(--border);
  background: #edf0f4;
  color: #647185;
  cursor: not-allowed;
}

.search-controls button {
  flex-shrink: 0;
}

#search-help {
  margin-top: 8px;
  font-size: 0.8rem;
}

#search-message {
  margin-top: 10px;
  font-size: 0.875rem;
}

#search-message:empty {
  display: none;
}

#search-message[data-state="error"] {
  color: var(--danger);
}

.search-result {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.search-result > h3 {
  margin-bottom: 12px;
}

/* Block table */

.blocks-section {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.refresh-controls {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.refresh-controls label {
  color: var(--muted);
  font-size: 0.8rem;
}

.refresh-controls select {
  font-size: 0.875rem;
}

.table-container {
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.blocks-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.blocks-table th,
.blocks-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}

.blocks-table th {
  background: var(--surface-muted);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 650;
  white-space: nowrap;
}

.blocks-table th.numeric,
.blocks-table td.numeric {
  text-align: right;
}

.blocks-table td {
  font-variant-numeric: tabular-nums;
}

.blocks-table tbody > tr:last-child > td {
  border-bottom: 0;
}

.blocks-table tbody > tr:not(.block-details-row):hover > td {
  background: var(--surface-muted);
}

.blocks-table td time {
  white-space: nowrap;
}

.blocks-table .block-height {
  color: var(--accent);
  font-weight: 650;
  white-space: nowrap;
}

.hash-preview {
  display: inline-block;
  max-width: 18ch;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 0.8rem;
  text-overflow: ellipsis;
  vertical-align: middle;
  white-space: nowrap;
}

.blocks-table .empty-state {
  padding: 40px 20px;
  color: var(--muted);
  text-align: center;
  white-space: normal;
}

.details-toggle {
  min-width: 76px;
}

.details-toggle[aria-expanded="true"] {
  border-color: var(--accent);
  background: #eef4fc;
  color: var(--accent);
}

.table-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 18px;
}

/* Expanded blocks and search results */

.blocks-table .block-details-row > td {
  padding: 0;
  white-space: normal;
}

.block-details {
  min-width: 0;
  padding: 22px;
  background: var(--surface-muted);
  overflow-wrap: anywhere;
}

.block-details > h3 {
  margin-bottom: 18px;
}

.details-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 24px;
}

.details-grid > div {
  min-width: 0;
}

.details-grid .detail-wide {
  grid-column: 1 / -1;
}

.details-grid dt {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 650;
}

.details-grid dd {
  min-width: 0;
  margin: 0;
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.details-grid code {
  white-space: normal;
  overflow-wrap: anywhere;
}

.copy-value {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.copy-value code {
  flex: 1;
  min-width: 0;
}

.copy-button {
  flex-shrink: 0;
  padding-inline: 12px;
  font-size: 0.75rem;
}

/* Transactions */

.transactions-section {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.transactions-section > h4 {
  margin-bottom: 10px;
}

.transaction-list {
  display: grid;
  gap: 12px;
  margin: 16px 0 0;
  padding-left: 24px;
}

.transaction-list:empty {
  display: none;
}

.transaction-list > li {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  overflow-wrap: anywhere;
}

.transaction-list > li::marker {
  color: var(--muted);
  font-size: 0.8rem;
}

.transaction-list dl {
  display: grid;
  gap: 10px;
}

.transaction-list dt {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
}

.transaction-list dd {
  margin: 3px 0 0;
  font-size: 0.875rem;
  overflow-wrap: anywhere;
}

.transaction-list code {
  white-space: normal;
  overflow-wrap: anywhere;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer-content {
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 16px 32px;
  padding-block: 24px;
  font-size: 0.8rem;
}

.footer-content > p:first-child {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-content > p:nth-child(2) {
  flex: 1 1 280px;
  max-width: 560px;
  font-size: 0.8rem;
}

.footer-content > a {
  margin-left: auto;
  padding-block: 8px;
}

/* Tablet */

@media (max-width: 960px) {
  .blocks-section > .section-heading {
    flex-direction: column;
    gap: 16px;
  }

  .overview > .section-heading {
    flex-wrap: wrap;
  }

  .connection-status {
    text-align: left;
  }
}

/* Mobile */

@media (max-width: 640px) {
  .container {
    width: calc(100% - 28px);
  }

  .header-content {
    gap: 12px;
    min-height: 76px;
  }

  .brand-name {
    font-size: 1.25rem;
  }

  .brand-description {
    font-size: 0.7rem;
  }

  .website-link {
    font-size: 0.8rem;
  }

  main.container {
    gap: 20px;
    padding-block: 24px 32px;
  }

  .section-heading {
    gap: 16px;
  }

  .summary-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .summary-card {
    padding: 16px;
  }

  .summary-card dt {
    margin-bottom: 6px;
  }

  .search-section,
  .blocks-section {
    padding: 16px;
  }

  .search-controls {
    flex-wrap: wrap;
  }

  .search-controls input {
    flex-basis: 100%;
  }

  .search-controls button {
    flex: 1 1 auto;
  }

  .refresh-controls {
    width: 100%;
  }

  .refresh-controls label {
    width: 100%;
  }

  .refresh-controls select {
    flex: 1 1 150px;
    min-width: 0;
  }

  .refresh-controls button {
    flex: 1 1 auto;
  }

  .blocks-table th,
  .blocks-table td {
    padding: 12px;
  }

  .table-footer {
    align-items: stretch;
    flex-direction: column;
    gap: 12px;
  }

  .block-details {
    padding: 16px;
  }

  .details-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .copy-value {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .footer-content {
    flex-direction: column;
    gap: 14px;
  }

  .footer-content > p:nth-child(2) {
    flex: initial;
  }

  .footer-content > a {
    margin-left: 0;
  }
}

/* Keep system high-contrast settings usable. */

@media (forced-colors: active) {
  .status-dot {
    background: CanvasText;
  }

  button,
  input,
  select,
  .status-badge {
    border: 1px solid ButtonText;
  }
}