.rn-page {
  background: var(--page-bg);
  color: var(--text-strong);
}

.rn-shell {
  width: min(1060px, calc(100% - 32px));
  margin: 0 auto;
  padding: 42px 0 58px;
}

.rn-hero {
  margin-bottom: 22px;
  max-width: 760px;
}

.rn-kicker {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font: 800 0.78rem/1 var(--font-display);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.rn-hero h1 {
  margin: 15px 0 9px;
  color: var(--text-strong);
  font: 800 2.55rem/1.06 var(--font-display);
  letter-spacing: 0;
}

.rn-hero h1 span {
  color: var(--accent);
}

.rn-hero p {
  margin: 0;
  max-width: 680px;
  color: var(--text-soft);
  font-size: 1.04rem;
  line-height: 1.7;
}

.rn-panel {
  background: var(--panel);
  border: 1px solid var(--header-border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 18px;
}

.rn-panel-head {
  margin-bottom: 18px;
}

.rn-panel-head-inline {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 14px;
}

.rn-panel-head h2 {
  margin: 0 0 5px;
  color: var(--text-strong);
  font: 800 1.15rem/1.2 var(--font-display);
}

.rn-panel-head p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.94rem;
}

.rn-mode-toggle {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  padding: 6px;
  margin-bottom: 18px;
  border: 1px solid var(--header-border);
  border-radius: 14px;
  background: var(--panel-soft);
}

.rn-mode-btn,
.rn-swap-btn,
.rn-primary-btn,
.rn-ghost-btn,
.rn-mini-btn,
.rn-date-chip,
.rn-output-box,
.rn-hist-use {
  border: 1px solid var(--header-border);
  border-radius: 12px;
  font-family: var(--font-display);
  font-weight: 800;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.rn-mode-btn {
  min-height: 44px;
  padding: 0 14px;
  background: transparent;
  color: var(--text-soft);
}

.rn-mode-btn.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-contrast);
}

.rn-io-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 86px minmax(0, 1fr);
  gap: 14px;
  align-items: end;
}

.rn-field {
  display: grid;
  gap: 8px;
  margin: 0;
}

.rn-field > span,
.rn-section-title {
  color: var(--text-muted);
  font: 800 0.8rem/1.2 var(--font-display);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.rn-input,
.rn-output-box {
  width: 100%;
  min-height: 58px;
  padding: 12px 14px;
  border: 1px solid var(--header-border);
  border-radius: 14px;
  background: var(--panel-soft);
  color: var(--text-strong);
  font: 800 1.18rem/1.2 var(--font-display);
  text-align: center;
  outline: none;
}

.rn-input:focus,
.rn-output-box:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.rn-input.is-error {
  border-color: #ef4444;
}

.rn-output-box {
  display: grid;
  place-items: center;
  word-break: break-word;
}

.rn-output-placeholder {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 700;
}

.rn-swap-btn {
  min-height: 58px;
  background: var(--panel-soft);
  color: var(--text-soft);
}

.rn-swap-btn:hover,
.rn-ghost-btn:hover,
.rn-mini-btn:hover,
.rn-date-chip:hover,
.rn-hist-use:hover,
.rn-output-box:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.rn-alert-wrap:empty {
  display: none;
}

.rn-alert {
  margin-top: 14px;
  padding: 11px 13px;
  border-radius: 12px;
  font-weight: 700;
  line-height: 1.45;
}

.rn-alert-error {
  background: rgba(239, 68, 68, 0.12);
  color: #b42318;
}

.rn-alert-success {
  background: var(--accent-soft);
  color: var(--accent);
}

.rn-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.rn-primary-btn,
.rn-ghost-btn,
.rn-mini-btn {
  min-height: 44px;
  padding: 0 16px;
}

.rn-primary-btn {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-contrast);
}

.rn-primary-btn:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}

.rn-ghost-btn,
.rn-mini-btn {
  background: var(--panel-soft);
  color: var(--text-soft);
}

.rn-mini-btn {
  min-height: 36px;
  padding: 0 12px;
  font-size: 0.82rem;
}

.rn-breakdown {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--header-border);
  border-radius: 14px;
  background: var(--panel-soft);
}

.rn-step-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.rn-step {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 34px;
  padding: 0 11px;
  border: 1px solid var(--header-border);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text-soft);
  font-weight: 800;
}

.rn-step-roman {
  color: var(--accent);
  font-family: var(--font-display);
}

.rn-date-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.rn-date-chip {
  min-height: 38px;
  padding: 0 13px;
  background: var(--panel-soft);
  color: var(--text-soft);
}

.rn-two-col {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
}

.rn-two-col .rn-panel {
  margin-bottom: 0;
}

.rn-history-list {
  display: grid;
  gap: 8px;
  max-height: 280px;
  overflow-y: auto;
}

.rn-hist-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  padding: 10px;
  border: 1px solid var(--header-border);
  border-radius: 12px;
  background: var(--panel-soft);
  color: var(--text-soft);
  font-size: 0.92rem;
}

.rn-hist-from,
.rn-hist-to {
  overflow-wrap: anywhere;
}

.rn-hist-to {
  color: var(--accent);
  font-weight: 900;
  font-family: var(--font-display);
}

.rn-hist-arrow {
  color: var(--text-muted);
}

.rn-hist-use {
  min-height: 30px;
  padding: 0 10px;
  background: var(--panel);
  color: var(--text-soft);
  font-size: 0.8rem;
}

.rn-empty {
  color: var(--text-muted);
  padding: 16px 0;
  text-align: center;
}

.rn-ref-table {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 9px;
}

.rn-ref-cell {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 42px;
  padding: 0 13px;
  border: 1px solid var(--header-border);
  border-radius: 12px;
  background: var(--panel-soft);
}

.rn-ref-cell span {
  color: var(--accent);
  font: 900 1rem/1 var(--font-display);
}

.rn-ref-cell strong {
  color: var(--text-soft);
}

.rn-note {
  margin: 14px 0 0;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

.rn-copy-tip {
  height: 18px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  text-align: center;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.rn-copy-tip.is-visible {
  opacity: 1;
}

.is-hidden {
  display: none !important;
}

@media (max-width: 820px) {
  .rn-shell {
    width: min(100% - 24px, 680px);
    padding-top: 28px;
  }

  .rn-hero h1 {
    font-size: 2rem;
  }

  .rn-panel {
    border-radius: 14px;
    padding: 18px;
  }

  .rn-io-grid,
  .rn-two-col {
    grid-template-columns: 1fr;
  }

  .rn-swap-btn {
    min-height: 44px;
  }

  .rn-panel-head-inline {
    align-items: stretch;
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .rn-mode-toggle {
    grid-template-columns: 1fr;
  }

  .rn-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .rn-primary-btn,
  .rn-ghost-btn {
    width: 100%;
  }

  .rn-hist-item {
    grid-template-columns: 1fr;
    text-align: left;
  }
}