:root {
  --ink: #161513;
  --panel: #1d1c19;
  --panel-raised: #232220;
  --hairline: #3a372f;
  --ivory: #ede8df;
  --ivory-dim: #a8a297;
  --brass: #b08d57;
  --brass-bright: #cba86b;
  --forest: #3c4a3e;
  --forest-bright: #5c7a5f;
  --danger: #b3564a;

  --serif: 'Fraunces', Georgia, serif;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'IBM Plex Mono', 'SF Mono', monospace;

  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--ink);
  color: var(--ivory);
  font-family: var(--sans);
  min-height: 100vh;
}

body {
  background-image:
    radial-gradient(ellipse 900px 500px at 50% -10%, rgba(176, 141, 87, 0.07), transparent),
    linear-gradient(var(--ink), var(--ink));
}

.screen {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 24px 48px;
  position: relative;
}

.screen[hidden] {
  display: none;
}

/* ---------- corner icon buttons ---------- */

.corner-btn {
  position: absolute;
  top: 28px;
  left: 28px;
}

#settings-btn {
  left: auto;
  right: 28px;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--hairline);
  background: var(--panel);
  color: var(--ivory-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.icon-btn svg {
  width: 19px;
  height: 19px;
}

.icon-btn:hover {
  border-color: var(--brass);
  color: var(--brass-bright);
}

.icon-btn:active {
  transform: scale(0.94);
}

.icon-btn:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 2px;
}

/* ---------- brandmark / headings ---------- */

.brandmark {
  text-align: center;
  margin: 12px 0 40px;
  max-width: 480px;
}

.brandmark-eyebrow {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brass);
  margin-bottom: 10px;
}

.brandmark h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(28px, 4vw, 38px);
  margin: 0;
  letter-spacing: -0.01em;
}

/* ---------- board (home screen converter) ---------- */

.board {
  width: 100%;
  max-width: 460px;
  background: var(--panel);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 8px;
}

.board-row {
  padding: 22px 24px;
}

.board-label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ivory-dim);
  margin-bottom: 12px;
}

.chf-input-wrap {
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 12px;
  transition: border-color 0.2s ease;
}

.chf-input-wrap:focus-within {
  border-color: var(--brass);
}

.chf-tag {
  font-family: var(--mono);
  font-size: 15px;
  color: var(--brass-bright);
  letter-spacing: 0.05em;
}

.chf-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--ivory);
  font-family: var(--serif);
  font-size: 32px;
  font-weight: 500;
  outline: none;
  min-width: 0;
}

.chf-input::placeholder {
  color: #55524a;
}

.board-divider {
  display: flex;
  justify-content: center;
  color: var(--hairline);
  padding: 2px 0;
}

.board-divider svg {
  width: 18px;
  height: 18px;
}

/* currency combobox */

.currency-select-wrap {
  position: relative;
}

.currency-input {
  width: 100%;
  background: var(--panel-raised);
  border: 1px solid var(--hairline);
  border-radius: 3px;
  color: var(--ivory);
  font-family: var(--sans);
  font-size: 16px;
  padding: 13px 14px;
  outline: none;
  transition: border-color 0.2s ease;
}

.currency-input:focus {
  border-color: var(--brass);
}

.currency-input::placeholder {
  color: var(--ivory-dim);
}

.currency-list {
  position: absolute;
  z-index: 5;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  max-height: 260px;
  overflow-y: auto;
  background: var(--panel-raised);
  border: 1px solid var(--hairline);
  border-radius: 3px;
  list-style: none;
  margin: 0;
  padding: 4px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.45);
}

.currency-list[hidden] {
  display: none;
}

.currency-list li {
  padding: 10px 12px;
  border-radius: 2px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 14px;
}

.currency-list li .code {
  font-family: var(--mono);
  color: var(--brass-bright);
  letter-spacing: 0.04em;
}

.currency-list li .rate {
  color: var(--ivory-dim);
  font-family: var(--mono);
  font-size: 13px;
}

.currency-list li:hover,
.currency-list li.active {
  background: rgba(176, 141, 87, 0.12);
}

.currency-list .empty {
  padding: 14px 12px;
  color: var(--ivory-dim);
  font-size: 13px;
  cursor: default;
}

.currency-list .empty:hover {
  background: transparent;
}

/* result */

.result {
  margin: 4px 16px 16px;
  padding: 26px 24px;
  background: var(--panel-raised);
  border: 1px solid var(--hairline);
  border-radius: 3px;
  text-align: center;
}

.result-figure {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.result-currency {
  font-family: var(--mono);
  font-size: 16px;
  color: var(--brass);
  letter-spacing: 0.06em;
}

.result-amount {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(34px, 6vw, 46px);
  line-height: 1;
  letter-spacing: -0.01em;
}

.result-meta {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ivory-dim);
  letter-spacing: 0.02em;
}

/* ---------- footer / refresh ---------- */

.rates-footer {
  margin-top: 22px;
  width: 100%;
  max-width: 460px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.rates-status {
  font-size: 12px;
  color: var(--ivory-dim);
  font-family: var(--mono);
}

.rates-status.stale {
  color: var(--danger);
}

.refresh-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--brass-bright);
  border: 1px solid var(--brass);
  border-radius: 3px;
  padding: 10px 18px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.refresh-btn:hover {
  background: var(--brass);
  color: var(--ink);
}

.refresh-btn:disabled {
  opacity: 0.5;
  cursor: default;
  background: transparent;
  color: var(--brass-bright);
}

.refresh-icon {
  width: 15px;
  height: 15px;
  transition: transform 0.6s ease;
}

.refresh-btn.spinning .refresh-icon {
  animation: spin 0.9s linear infinite;
}

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

/* ---------- settings screen ---------- */

.settings-card {
  width: 100%;
  max-width: 420px;
  background: var(--panel);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 28px 28px 32px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ivory-dim);
  margin: 18px 0 8px;
}

.field-label:first-child {
  margin-top: 0;
}

.field-input {
  width: 100%;
  background: var(--panel-raised);
  border: 1px solid var(--hairline);
  border-radius: 3px;
  color: var(--ivory);
  font-family: var(--sans);
  font-size: 15px;
  padding: 12px 14px;
  outline: none;
  transition: border-color 0.2s ease;
}

.field-input:focus {
  border-color: var(--brass);
}

.password-wrap {
  position: relative;
  display: flex;
}

.password-wrap .field-input {
  padding-right: 44px;
}

.toggle-password {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  border: none;
  background: transparent;
  color: var(--ivory-dim);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.toggle-password:hover {
  color: var(--brass-bright);
}

.toggle-password svg {
  width: 18px;
  height: 18px;
}

.field-hint {
  font-size: 12px;
  color: var(--ivory-dim);
  margin: 6px 2px 0;
  min-height: 16px;
}

.env-toggle {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.env-option {
  flex: 1;
  padding: 12px;
  background: var(--panel-raised);
  border: 1px solid var(--hairline);
  border-radius: 3px;
  color: var(--ivory-dim);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.env-option:hover {
  border-color: var(--brass);
}

.env-option[aria-checked="true"] {
  background: rgba(176, 141, 87, 0.14);
  border-color: var(--brass);
  color: var(--brass-bright);
}

.env-option[data-env="production"][aria-checked="true"] {
  background: rgba(179, 86, 74, 0.14);
  border-color: var(--danger);
  color: #d68c82;
}

.save-btn {
  margin-top: 26px;
  padding: 14px;
  background: var(--brass);
  color: var(--ink);
  border: none;
  border-radius: 3px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.2s ease;
}

.save-btn:hover {
  background: var(--brass-bright);
}

/* ---------- modal ---------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 9, 8, 0.7);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
}

.modal-overlay[hidden] {
  display: none;
}

.modal-card {
  background: var(--panel);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 32px;
  max-width: 360px;
  width: calc(100% - 48px);
  text-align: center;
}

.modal-card h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 22px;
  margin: 0 0 12px;
}

.modal-card p {
  color: var(--ivory-dim);
  font-size: 14px;
  line-height: 1.5;
  margin: 0 0 24px;
}

.modal-ok-btn {
  padding: 11px 32px;
  background: var(--brass);
  color: var(--ink);
  border: none;
  border-radius: 3px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.modal-ok-btn:hover {
  background: var(--brass-bright);
}

/* ---------- misc ---------- */

@media (max-width: 520px) {
  .board-row { padding: 18px 16px; }
  .result { margin: 4px 8px 8px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}