:root {
  --bg: #f4f6f3;
  --surface: #ffffff;
  --surface-strong: #f9fbf8;
  --ink: #17201b;
  --muted: #617068;
  --line: #dbe2dc;
  --gold: #c98d22;
  --green: #147a5c;
  --blue: #2468b2;
  --red: #b72d3b;
  --shadow: 0 18px 50px rgba(23, 32, 27, 0.08);
}

* {
  box-sizing: border-box;
}

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

button,
input,
textarea {
  font: inherit;
}

button {
  min-height: 42px;
  border: 0;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 8px;
  padding: 12px 13px;
  outline: none;
}

input:focus,
textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(36, 104, 178, 0.14);
}

label {
  display: block;
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

code,
pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.app-shell {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 20px 0 36px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 0 22px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: #fff;
  border-radius: 8px;
  font-weight: 900;
  font-size: 24px;
}

.brand h1,
.brand p,
h2,
h3,
p {
  margin: 0;
}

.brand h1 {
  font-size: 22px;
  line-height: 1.1;
  letter-spacing: 0;
}

.eyebrow {
  color: var(--gold);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.top-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
}

.api-state {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 8px;
  padding: 8px 12px;
  color: var(--muted);
  font-size: 13px;
}

.state-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
}

.api-state.ok .state-dot {
  background: var(--green);
}

.api-state.error .state-dot {
  background: var(--red);
}

.screen {
  display: block;
}

.screen.narrow {
  max-width: 720px;
  margin: 0 auto;
}

.hidden {
  display: none !important;
}

.hero-panel,
.panel,
.wallet-summary,
.wallet-panel {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.hero-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: end;
  padding: 30px;
}

.hero-panel h2 {
  margin-top: 8px;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.02;
  letter-spacing: 0;
}

.hero-panel p:not(.eyebrow) {
  max-width: 720px;
  margin-top: 16px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.65;
}

.security-list {
  display: grid;
  gap: 8px;
}

.security-list span {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  padding: 10px 12px;
  color: var(--green);
  white-space: nowrap;
  font-weight: 800;
  font-size: 13px;
}

.setup-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.panel {
  padding: 22px;
}

.panel h2 {
  font-size: 24px;
  line-height: 1.2;
}

.panel h3 {
  font-size: 20px;
  line-height: 1.2;
}

.panel p {
  margin-top: 10px;
  color: var(--muted);
  line-height: 1.55;
}

.primary-button,
.secondary-button,
.ghost-button,
.danger-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 10px 14px;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.primary-button {
  background: var(--green);
  color: #fff;
}

.secondary-button {
  border: 1px solid var(--line);
  background: var(--surface-strong);
  color: var(--ink);
}

.ghost-button {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
}

.danger-button {
  background: var(--red);
  color: #fff;
}

.setup-grid .primary-button,
.setup-grid .secondary-button {
  margin-top: 20px;
  width: 100%;
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.warning-text {
  border: 1px solid rgba(201, 141, 34, 0.32);
  background: #fff8e9;
  color: #7a530c;
  border-radius: 8px;
  padding: 12px;
  margin: 0 0 14px !important;
}

.notice {
  border: 1px solid var(--line);
  background: var(--surface-strong);
  border-radius: 8px;
  padding: 14px;
  color: var(--muted);
}

.notice-error {
  border-color: rgba(183, 45, 59, 0.34);
  background: #fff1f2;
  color: var(--red);
  margin-bottom: 14px;
}

.mnemonic-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.mnemonic-grid li {
  min-height: 46px;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  background: var(--surface-strong);
  border-radius: 8px;
  padding: 10px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.mnemonic-grid span {
  color: var(--muted);
  font-size: 12px;
}

.derived-box {
  display: grid;
  gap: 8px;
  border: 1px solid var(--line);
  background: var(--surface-strong);
  border-radius: 8px;
  padding: 14px;
  margin-top: 16px;
  overflow-wrap: anywhere;
}

.derived-box span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.split-fields,
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.form-grid {
  grid-template-columns: minmax(240px, 2fr) minmax(160px, 1fr) minmax(120px, 0.5fr) auto;
  align-items: end;
}

.send-max-wrap {
  display: flex;
  align-items: end;
}

.help-text {
  color: var(--muted);
  font-size: 13px;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.error-text,
.success-text {
  min-height: 20px;
  margin-top: 12px !important;
  font-size: 14px;
}

.error-text {
  color: var(--red) !important;
}

.success-text {
  color: var(--green) !important;
}

.wallet-summary {
  display: grid;
  grid-template-columns: minmax(210px, 0.75fr) minmax(0, 1.4fr) auto;
  gap: 18px;
  align-items: center;
  padding: 22px;
}

.balance-value {
  margin-top: 8px;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1;
  font-weight: 900;
  letter-spacing: 0;
}

.muted-line {
  margin-top: 8px;
  min-height: 18px;
  color: var(--muted);
  font-size: 13px;
}

.address-card {
  min-width: 0;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 10px;
  align-items: center;
  border: 1px solid var(--line);
  background: var(--surface-strong);
  border-radius: 8px;
  padding: 12px;
}

.address-card span {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.address-card code,
#receiveAddress {
  min-width: 0;
  overflow-wrap: anywhere;
}

.summary-actions {
  display: grid;
  gap: 8px;
}

.tabs {
  display: flex;
  gap: 8px;
  margin: 14px 0;
  overflow-x: auto;
}

.tab-button {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  border-radius: 8px;
  padding: 10px 14px;
  font-weight: 800;
  white-space: nowrap;
}

.tab-button.active {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

.wallet-panel {
  padding: 22px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.metric {
  border: 1px solid var(--line);
  background: var(--surface-strong);
  border-radius: 8px;
  padding: 14px;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.metric strong {
  display: block;
  margin-top: 8px;
  font-size: 22px;
  overflow-wrap: anywhere;
}

.tx-preview {
  border: 1px solid var(--line);
  background: var(--surface-strong);
  border-radius: 8px;
  padding: 14px;
  margin-top: 16px;
}

.tx-preview dl,
.info-list {
  margin: 0;
}

.tx-preview div,
.info-list div {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}

.tx-preview div:last-child,
.info-list div:last-child {
  border-bottom: 0;
}

.tx-preview dt,
.info-list dt {
  color: var(--muted);
  font-weight: 800;
}

.tx-preview dd,
.info-list dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.receive-grid {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 24px;
  align-items: center;
}

.qr-box {
  width: 220px;
  min-height: 220px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 10px;
}

.receive-grid h2 {
  margin-bottom: 10px;
}

.receive-grid p {
  color: var(--muted);
  margin-bottom: 16px;
}

.receive-grid .secondary-button {
  margin-top: 14px;
}

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

.history-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  border: 1px solid var(--line);
  background: var(--surface-strong);
  border-radius: 8px;
  padding: 13px;
}

.history-item code {
  overflow-wrap: anywhere;
}

.history-item span {
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

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

.settings-grid h2,
.danger-zone h2 {
  margin-bottom: 12px;
}

.secret-box {
  max-height: 240px;
  overflow: auto;
  border: 1px solid var(--line);
  background: #111813;
  color: #edf7ef;
  border-radius: 8px;
  padding: 14px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.danger-zone {
  border-top: 1px solid var(--line);
  margin-top: 22px;
  padding-top: 18px;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  max-width: min(520px, calc(100vw - 32px));
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  padding: 12px 16px;
  box-shadow: var(--shadow);
  z-index: 20;
}

@media (max-width: 920px) {
  .hero-panel,
  .setup-grid,
  .wallet-summary,
  .metric-grid,
  .settings-grid {
    grid-template-columns: 1fr;
  }

  .security-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .summary-actions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .form-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .app-shell {
    width: min(100vw - 24px, 1180px);
    padding-top: 12px;
  }

  .topbar {
    align-items: flex-start;
  }

  .top-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .brand h1 {
    font-size: 19px;
  }

  .hero-panel,
  .panel,
  .wallet-summary,
  .wallet-panel {
    padding: 16px;
  }

  .hero-panel h2 {
    font-size: 34px;
  }

  .security-list,
  .split-fields,
  .form-grid,
  .summary-actions,
  .receive-grid {
    grid-template-columns: 1fr;
  }

  .mnemonic-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .qr-box {
    width: 100%;
  }

  .tx-preview div,
  .info-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}