/* src/styles.css */
:root {
  --buncss-light: initial;
  --buncss-dark: ;
  color-scheme: light;
  --bg: #f5f7fa;
  --bg-soft: #fbf8f1;
  --panel: #fff;
  --panel-2: #f1f5f9;
  --border: #e2e8f0;
  --border-hover: #cbd5e1;
  --text: #1e293b;
  --muted: #64748b;
  --muted-2: #94a3b8;
  --navy: #0f2a5c;
  --blue: #2563eb;
  --blue-strong: #1d4ed8;
  --purple: #7c3aed;
  --teal: #0d9488;
  --amber: #d97706;
  --green: #16a34a;
  --red: #dc2626;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px #0f172a0d, 0 1px 3px #0f172a0f;
  --shadow-md: 0 8px 20px #0f172a14, 0 2px 6px #0f172a0d;
}

* {
  box-sizing: border-box;
}

html, body {
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, Hiragino Kaku Gothic ProN, Hiragino Sans, Yu Gothic, Segoe UI, Roboto, sans-serif;
}

#root {
  min-height: 100vh;
}

a {
  color: var(--blue);
}

button {
  cursor: pointer;
  font-family: inherit;
}

input, select {
  font-family: inherit;
}

.app-shell {
  display: flex;
  background: radial-gradient(1100px 420px at 12% -8%, #2563eb0f, transparent 60%), radial-gradient(900px 380px at 100% 0%, #d977060d, transparent 55%), var(--bg);
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  position: sticky;
  z-index: 20;
  display: flex;
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  background: #ffffffe6;
  justify-content: space-between;
  align-items:  center;
  gap: 16px;
  padding: 14px 24px;
  top: 0;
}

.topbar-left {
  display: flex;
  align-items:  center;
  gap: 14px;
  min-width: 0;
}

.brand {
  white-space: nowrap;
  color: var(--navy);
  font-size: 15.5px;
  font-weight: 700;
}

.brand-sub {
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 500;
}

.topbar-right {
  display: flex;
  align-items:  center;
  gap: 10px;
}

.main {
  flex: 1;
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 32px 20px 72px;
}

.back-link {
  color: var(--muted);
  display: inline-flex;
  background: none;
  border: none;
  align-items:  center;
  gap: 6px;
  padding: 6px 0;
  font-size: 13px;
  font-weight: 500;
}

.back-link:hover {
  color: var(--blue);
}

.page-title {
  color: var(--navy);
  letter-spacing: -.01em;
  margin: 0 0 6px;
  font-size: 24px;
  font-weight: 800;
}

.page-sub {
  color: var(--muted);
  margin: 0 0 26px;
  font-size: 14px;
  line-height: 1.7;
}

.section-title {
  color: var(--navy);
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 700;
}

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

.muted-2 {
  color: var(--muted-2);
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.small {
  font-size: 12.5px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 22px;
}

.card + .card {
  margin-top: 16px;
}

.card-tight {
  padding: 14px 16px;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.stack-sm {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

.row-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items:  center;
  gap: 8px;
}

.between {
  display: flex;
  justify-content: space-between;
  align-items:  center;
  gap: 12px;
}

.grow {
  flex: 1;
  min-width: 0;
}

.addr-box {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--muted);
  word-break: break-all;
  padding: 10px 12px;
  font-size: 12.5px;
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.feature-card {
  display: block;
  text-align: left;
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent, var(--border));
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  color: var(--text);
  padding: 20px;
  transition: box-shadow .15s, transform .15s;
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.feature-card .step {
  color: var(--accent, var(--muted));
  letter-spacing: .04em;
  font-size: 11.5px;
  font-weight: 700;
}

.feature-card h3 {
  color: var(--navy);
  margin: 8px 0 6px;
  font-size: 16px;
}

.feature-card p {
  color: var(--muted);
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
}

.btn {
  display: inline-flex;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  white-space: nowrap;
  justify-content: center;
  align-items:  center;
  gap: 8px;
  padding: 10px 18px;
  transition: background .15s, border-color .15s, box-shadow .15s, opacity .15s;
  font-size: 13.5px;
  font-weight: 600;
}

.btn:hover:not(:disabled) {
  background: var(--panel-2);
  border-color: var(--border-hover);
}

.btn:disabled {
  opacity: .45;
  cursor: not-allowed;
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 7px 13px;
  font-size: 12.5px;
}

.btn-primary {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
  background: var(--blue-strong);
  border-color: var(--blue-strong);
}

.btn-purple {
  background: var(--purple);
  border-color: var(--purple);
  color: #fff;
}

.btn-purple:hover:not(:disabled) {
  background: #6d28d9;
  border-color: #6d28d9;
}

.btn-teal {
  background: var(--teal);
  border-color: var(--teal);
  color: #fff;
}

.btn-teal:hover:not(:disabled) {
  background: #0f766e;
  border-color: #0f766e;
}

.btn-amber {
  background: var(--amber);
  border-color: var(--amber);
  color: #fff;
}

.btn-amber:hover:not(:disabled) {
  background: #b45309;
  border-color: #b45309;
}

.btn-green {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
}

.btn-green:hover:not(:disabled) {
  background: #15803d;
  border-color: #15803d;
}

.btn-danger {
  color: var(--red);
  background: none;
  border-color: #fca5a5;
}

.btn-danger:hover:not(:disabled) {
  background: #dc26260f;
}

.btn-ghost {
  border-color: var(--border);
  color: var(--muted);
  background: none;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--panel-2);
  color: var(--text);
}

.input, .select {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  width: 100%;
  padding: 10px 13px;
  transition: border-color .15s, box-shadow .15s;
  font-size: 13.5px;
}

.input::placeholder {
  color: var(--muted-2);
}

.input:focus, .select:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px #2563eb1f;
}

.input-mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px;
}

.field-label {
  color: var(--muted);
  display: block;
  margin-bottom: 6px;
  font-size: 12.5px;
  font-weight: 600;
}

.badge {
  display: inline-flex;
  border: 1px solid var(--border);
  color: var(--muted);
  background: var(--panel-2);
  border-radius: 999px;
  align-items:  center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 700;
}

.badge-blue {
  color: #1d4ed8;
  background: #2563eb14;
  border-color: #2563eb40;
}

.badge-purple {
  color: #6d28d9;
  background: #7c3aed14;
  border-color: #7c3aed40;
}

.badge-teal {
  color: #0f766e;
  background: #0d948814;
  border-color: #0d948840;
}

.badge-amber {
  color: #b45309;
  background: #d9770617;
  border-color: #d9770647;
}

.badge-green {
  color: #15803d;
  background: #16a34a14;
  border-color: #16a34a40;
}

.badge-red {
  color: #b91c1c;
  background: #dc262614;
  border-color: #dc262640;
}

.step-dot {
  display: inline-flex;
  border: 1px solid var(--border);
  color: var(--muted);
  background: var(--panel);
  border-radius: 999px;
  flex-shrink: 0;
  justify-content: center;
  align-items:  center;
  width: 22px;
  height: 22px;
  font-size: 11px;
  font-weight: 700;
}

.step-dot.done {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
}

.step-dot.active {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}

.alert {
  border-radius: var(--radius-sm);
  white-space: pre-wrap;
  word-break: break-word;
  padding: 11px 15px;
  font-size: 13px;
  line-height: 1.6;
}

.alert-error {
  color: #b91c1c;
  background: #dc26260f;
  border: 1px solid #dc262640;
}

.alert-success {
  color: #15803d;
  background: #16a34a12;
  border: 1px solid #16a34a40;
}

.alert-info {
  color: #1d4ed8;
  background: #2563eb0f;
  border: 1px solid #2563eb40;
}

.alert-warn {
  color: #b45309;
  background: #d9770612;
  border: 1px solid #d9770647;
}

.toggle {
  display: inline-flex;
  border: 1px solid var(--border);
  background: var(--panel-2);
  border-radius: 999px;
  align-items:  center;
  gap: 4px;
  padding: 3px;
}

.toggle-option {
  color: var(--muted);
  background: none;
  border: none;
  border-radius: 999px;
  padding: 6px 13px;
  font-size: 12px;
  font-weight: 700;
}

.toggle-option.active {
  background: var(--teal);
  color: #fff;
}

.toggle-option.active.gas {
  background: var(--amber);
  color: #fff;
}

.wallet-badge {
  display: flex;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: 999px;
  align-items:  center;
  gap: 8px;
  padding: 5px 12px 5px 5px;
  font-size: 12px;
}

.wallet-dot {
  background: var(--green);
  border-radius: 999px;
  width: 8px;
  height: 8px;
}

.modal-overlay {
  position: fixed;
  display: flex;
  z-index: 50;
  background: #0f172a73;
  justify-content: center;
  align-items:  center;
  padding: 16px;
  inset: 0;
}

.modal {
  background: var(--panel);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border-radius: 18px;
  width: 100%;
  max-width: 380px;
}

.modal-header {
  display: flex;
  border-bottom: 1px solid var(--border);
  justify-content: space-between;
  align-items:  center;
  padding: 16px 18px;
}

.modal-body {
  padding: 18px;
}

.modal-close {
  color: var(--muted);
  background: none;
  border: none;
  font-size: 18px;
  line-height: 1;
}

.divider {
  background: var(--border);
  border: none;
  height: 1px;
  margin: 4px 0;
}

.tx-link {
  color: var(--blue);
  text-decoration: underline;
  word-break: break-all;
  font-weight: 600;
}

.spinner {
  border: 2px solid var(--border);
  border-top-color: var(--blue);
  animation: spin .7s linear infinite;
  display: inline-block;
  border-radius: 999px;
  width: 16px;
  height: 16px;
}

.spinner-lg {
  border-width: 3px;
  width: 30px;
  height: 30px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.page-loading {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items:  center;
  gap: 14px;
  padding: 72px 0;
}

.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  gap: 4px;
  margin-bottom: 18px;
}

.tab {
  color: var(--muted);
  background: none;
  border: none;
  border-bottom: 2px solid #0000;
  margin-right: 16px;
  padding: 8px 4px;
  font-size: 13px;
}

.tab.active {
  color: var(--navy);
  border-bottom-color: var(--blue);
}

.center-page {
  display: flex;
  justify-content: center;
  align-items:  center;
  min-height: calc(100vh - 60px);
  padding: 20px;
}

.mermaid-diagram {
  overflow-x: auto;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-top: 12px;
  padding: 12px;
}

.mermaid-diagram svg {
  display: block;
  max-width: 100%;
  margin: 0 auto;
}

.tech-details {
  border-top: 1px solid var(--border);
  color: var(--muted-2);
  margin-top: 10px;
  padding-top: 8px;
  font-size: 12px;
}

.tech-details summary {
  cursor: pointer;
  color: var(--muted);
  list-style: none;
  font-weight: 600;
}

.tech-details summary::-webkit-details-marker {
  display: none;
}

.tech-details-body {
  margin-top: 8px;
  line-height: 1.6;
}