/* Uniswap v4 — swap demo + v4 explainer blocks
   Both reuse the page's design tokens so they sit inside the existing look. */

/* ============ Swap demo ============ */
/* Sits in the first screen and reads as one centred showcase. */
.uv4-center {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: calc(100vh - var(--landing-nav-height, 64px));
}

.uv4-center .Chapter-module__RBY8-G__chapter {
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-2);
  padding-top: 0;
  padding-bottom: var(--space-8);
}

.uv4-center .Chapter-module__RBY8-G__titleRow {
  justify-content: center;
}

.uv4-center .Chapter-module__RBY8-G__link {
  align-self: center;
  margin-top: var(--space-2);
}

.uv4-center .Chapter-module__RBY8-G__tone {
  max-width: 44ch;
}

.uv4-swap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.uv4-swap-card {
  position: relative;
  width: min(100%, 470px);
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-2);
  border: 1px solid color-mix(in srgb, var(--text) 11%, transparent);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--text) 4%, transparent);
}

.uv4-swap-field {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--text) 5%, transparent);
}

.uv4-swap-label {
  margin-bottom: var(--space-2);
  color: var(--text-muted);
  font-size: var(--text-xs);
  letter-spacing: 0.01em;
}

.uv4-swap-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.uv4-swap-input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: none;
  color: var(--text);
  font-family: inherit;
  font-size: 32px;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
  padding: 0;
  outline: none;
  font-variant-numeric: tabular-nums;
}

.uv4-swap-input::placeholder {
  color: color-mix(in srgb, var(--text) 28%, transparent);
}

.uv4-swap-fiat {
  margin-top: var(--space-2);
  color: var(--text-faint);
  font-size: var(--text-xs);
  font-variant-numeric: tabular-nums;
}

.uv4-token {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid color-mix(in srgb, var(--text) 12%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--text) 7%, transparent);
  color: var(--text);
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s;
}

.uv4-token:hover {
  background: color-mix(in srgb, var(--text) 11%, transparent);
}

.uv4-token[data-empty='true'] {
  background: var(--accent);
  border-color: transparent;
  color: var(--on-accent);
}

.uv4-token[data-empty='true']:hover {
  background: color-mix(in srgb, var(--accent) 88%, white);
}

.uv4-swap-flip {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 4px solid var(--bg);
  border-radius: 50%;
  background: color-mix(in srgb, var(--text) 12%, transparent);
  color: var(--text);
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  transition: background-color 0.15s, transform 0.2s;
}

.uv4-swap-flip:hover {
  background: color-mix(in srgb, var(--text) 20%, transparent);
}

.uv4-swap-flip:active {
  transform: translate(-50%, -50%) scale(0.92);
}

.uv4-swap-cta {
  width: 100%;
  margin-top: var(--space-2);
  opacity: 0.92;
}

.uv4-swap-note {
  margin: 0;
  max-width: 460px;
  text-align: center;
  color: var(--text-muted);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.uv4-swap-note b {
  color: var(--accent-ink);
  font-weight: 600;
}

/* token marks inside the swap buttons */
.uv4-token-icon {
  position: relative;
  flex: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
}

.uv4-token-icon img,
.uv4-token-icon svg {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 50%;
  object-fit: cover;
}

.uv4-token-icon .uv4-chain {
  width: 11px;
  height: 11px;
  border-width: 1.5px;
  background-size: 5px 5px;
}

.uv4-token-sym {
  font-size: var(--text-sm);
  font-weight: 600;
}

.uv4-chev {
  flex: none;
  opacity: 0.65;
}

/* chain badge: ethereum mark */
.uv4-chain {
  position: absolute;
  right: -2px;
  bottom: -2px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid #12141b;
  background: #627eea url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Cpath fill='%23fff' d='M16 3l6.6 10.6L16 18.1l-6.6-4.5z'/%3E%3Cpath fill='%23fff' opacity='.85' d='M16 20.1l6.6-4.5L16 29.2l-6.6-13.6z'/%3E%3C/svg%3E") center / 7px 7px no-repeat;
}

/* token picker sheet */
.uv4-picker {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: none;
  place-items: center;
  padding: var(--space-4);
  background: rgba(0, 0, 0, 0.62);
  backdrop-filter: blur(6px);
}

.uv4-picker[data-open='true'] {
  display: grid;
}

.uv4-picker-panel {
  width: min(100%, 400px);
  max-height: min(82vh, 720px);
  display: flex;
  flex-direction: column;
  padding: var(--space-3);
  border: 1px solid color-mix(in srgb, var(--text) 12%, transparent);
  border-radius: var(--radius-lg);
  background: #12141b;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.55);
}

.uv4-picker-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 2px 2px 10px 4px;
}

.uv4-picker-title {
  color: var(--text);
  font-size: var(--text-base, 15px);
  font-weight: 600;
}

.uv4-picker-title:focus {
  outline: none;
}

.uv4-picker-close {
  flex: none;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
}

.uv4-picker-close:hover {
  background: color-mix(in srgb, var(--text) 9%, transparent);
  color: var(--text);
}

.uv4-picker-search {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 40px;
  padding: 0 12px;
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--text) 6%, transparent);
}

.uv4-search-icon {
  flex: none;
  color: var(--text-faint);
}

.uv4-picker-input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: none;
  color: var(--text);
  font-family: inherit;
  font-size: var(--text-sm);
  outline: none;
}

.uv4-picker-input::placeholder {
  color: var(--text-faint);
}

.uv4-quick {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
  padding: var(--space-3) 0;
}

.uv4-quick-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 10px 4px;
  border: 1px solid color-mix(in srgb, var(--text) 10%, transparent);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--text) 5%, transparent);
  color: var(--text);
  font-family: inherit;
  font-size: var(--text-xs);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s;
}

.uv4-quick-item:hover {
  background: color-mix(in srgb, var(--text) 9%, transparent);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
}

.uv4-quick-icon {
  position: relative;
  width: 28px;
  height: 28px;
  border-radius: 50%;
}

.uv4-quick-icon img,
.uv4-quick-icon svg {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 50%;
  object-fit: cover;
}

.uv4-quick-icon .uv4-chain {
  width: 12px;
  height: 12px;
  border-width: 1.5px;
  background-size: 6px 6px;
}

.uv4-picker-section {
  padding: 2px 4px 8px;
  color: var(--text-faint);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.uv4-token-list {
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-y: auto;
  display: grid;
  gap: 2px;
}

.uv4-token-list::-webkit-scrollbar {
  width: 6px;
}

.uv4-token-list::-webkit-scrollbar-thumb {
  border-radius: 3px;
  background: color-mix(in srgb, var(--text) 18%, transparent);
}

.uv4-picker-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px;
  border: 0;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--text);
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.12s;
}

.uv4-picker-item:hover {
  background: color-mix(in srgb, var(--text) 7%, transparent);
}

.uv4-ticon {
  position: relative;
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
}

.uv4-ticon img,
.uv4-ticon svg {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 50%;
  object-fit: cover;
}

.uv4-tmeta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.uv4-tname {
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.25;
}

.uv4-tsub {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-faint);
  font-size: var(--text-xs);
  line-height: 1.2;
}

.uv4-tsub b {
  color: var(--text-muted);
  font-weight: 600;
}

.uv4-tsub em {
  font-style: normal;
  font-family: var(--font-mono, ui-monospace), ui-monospace, monospace;
}

.uv4-empty {
  padding: 18px 8px;
  color: var(--text-faint);
  font-size: var(--text-sm);
  text-align: center;
}
/* ============ v4 explainer ============ */
.uv4-learn {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
}

@media (max-width: 900px) {
  .uv4-learn {
    grid-template-columns: minmax(0, 1fr);
  }
}

.uv4-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  align-content: start;
  align-items: start;
}

@media (max-width: 620px) {
  .uv4-cards {
    grid-template-columns: minmax(0, 1fr);
  }
}

.uv4-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  border: 1px solid color-mix(in srgb, var(--text) 8%, transparent);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--text) 3%, transparent);
}

.uv4-card h3 {
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--accent-ink);
  font-size: var(--text-md);
  font-weight: 600;
  line-height: var(--leading-md, 1.4);
}

.uv4-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.uv4-card code {
  font-family: var(--font-mono, ui-monospace), ui-monospace, monospace;
  font-size: 0.92em;
  color: var(--text);
}

.uv4-lifecycle {
  padding: var(--space-4);
  border: 1px solid color-mix(in srgb, var(--text) 8%, transparent);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--text) 3%, transparent);
}

.uv4-lifecycle h3 {
  margin: 0 0 var(--space-3);
  color: var(--text);
  font-size: var(--text-md);
  font-weight: 600;
}

.uv4-hooks-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

.uv4-hooks-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--text) 4%, transparent);
  font-family: var(--font-mono, ui-monospace), ui-monospace, monospace;
  font-size: var(--text-xs);
  color: var(--text);
}

.uv4-hooks-list li span.phase {
  flex: none;
  min-width: 74px;
  padding: 2px 6px;
  border-radius: 4px;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  color: var(--accent-ink);
  font-family: inherit;
  font-size: 10px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-align: center;
}

.uv4-lifecycle-foot {
  margin: var(--space-3) 0 0;
  color: var(--text-faint);
  font-size: var(--text-xs);
  line-height: 1.6;
}

.uv4-lifecycle-foot code {
  font-family: var(--font-mono, ui-monospace), ui-monospace, monospace;
  color: var(--text-muted);
}

.uv4-docs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: var(--space-4);
}

.uv4-docs a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  border: 1px solid color-mix(in srgb, var(--text) 11%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--text) 3%, transparent);
  color: var(--text-muted);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: color 0.15s, border-color 0.15s, background-color 0.15s;
}

.uv4-docs a:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
  background: color-mix(in srgb, var(--text) 6%, transparent);
}