:root {
  --bg: #0f172a;
  --bg-elevated: #16213a;
  --bg-card: #182544;
  --border: #2a3a5c;
  --text: #e8ecf5;
  --text-muted: #93a1c0;
  --gold: #d4af37;
  --gold-soft: #f2d675;
  --blue: #4f7cf6;
  --blue-soft: #7fa1ff;
  --green: #34d399;
  --red: #f87171;
  --radius-lg: 16px;
  --radius-md: 10px;
  --shadow: 0 12px 32px -12px rgba(0, 0, 0, 0.45);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
}

[data-theme="light"] {
  --bg: #f4f6fb;
  --bg-elevated: #ffffff;
  --bg-card: #ffffff;
  --border: #e1e6f0;
  --text: #10182c;
  --text-muted: #5b6785;
  --gold: #b8860b;
  --gold-soft: #d9a520;
  --blue: #2952d9;
  --blue-soft: #4f7cf6;
  --shadow: 0 12px 32px -14px rgba(30, 41, 80, 0.18);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  transition: background 0.25s ease, color 0.25s ease;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

.app {
  max-width: 860px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

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

.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--gold), var(--gold-soft));
  color: #16213a;
  flex-shrink: 0;
}

.brand h1 {
  font-size: 1.4rem;
  font-weight: 800;
  margin: 0;
  letter-spacing: -0.01em;
}

.brand-symbols {
  background: linear-gradient(135deg, var(--gold), var(--blue-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.updated-line {
  margin: 2px 0 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

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

.btn {
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  border-radius: var(--radius-md);
  padding: 9px 16px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.btn:hover { border-color: var(--blue); }
.btn:active { transform: scale(0.97); }
.btn:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

.btn-refresh.is-loading #refresh-icon { animation: spin 0.9s linear infinite; }

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

.btn-icon {
  padding: 9px;
  width: 38px;
  height: 38px;
  justify-content: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--blue-soft));
  border-color: transparent;
  color: #fff;
}

.alert-banner {
  background: rgba(248, 113, 113, 0.12);
  border: 1px solid var(--red);
  color: var(--red);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 0.88rem;
  margin-bottom: 20px;
}

.cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.rate-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.rate-card--usd { background: linear-gradient(160deg, var(--bg-card), rgba(212, 175, 55, 0.08)); }
.rate-card--eur { background: linear-gradient(160deg, var(--bg-card), rgba(79, 124, 246, 0.10)); }

.rate-card-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.flag { font-size: 1.15rem; }

.rate-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.rate-value {
  margin: 0 0 12px;
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.rate-symbol { color: var(--text-muted); font-weight: 600; font-size: 1.1rem; }
.rate-unit { font-size: 0.85rem; font-weight: 600; color: var(--text-muted); margin-left: 4px; }

.rate-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.rate-change { font-weight: 700; }
.rate-change.up { color: var(--green); }
.rate-change.down { color: var(--red); }
.rate-change.flat { color: var(--text-muted); }

.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.panel h2 {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 14px;
}

.date-query {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.date-field {
  flex: 1;
  min-width: 160px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0 12px;
  color: var(--text-muted);
}

.date-field input[type="date"] {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
  padding: 10px 0;
  color-scheme: dark;
}

[data-theme="light"] .date-field input[type="date"] { color-scheme: light; }

.date-field input[type="date"]:focus { outline: none; }
.date-field:focus-within { border-color: var(--blue); }

.hint {
  margin: 12px 0 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.hint.success { color: var(--green); }
.hint.error { color: var(--red); }

.query-result {
  margin-top: 16px;
}

.query-result-empty {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.query-result-card {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
}

.query-result-date {
  flex: 1 1 100%;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}

.query-result-values {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
}

.query-result-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.query-result-item-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
}

.query-result-item-value {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.query-result-item-value .query-unit {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-left: 4px;
}

.query-result-note {
  flex: 1 1 100%;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.query-result-message {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  padding: 14px 16px;
  border-radius: var(--radius-md);
}

.query-result-message.error {
  color: var(--red);
  background: rgba(248, 113, 113, 0.12);
  border: 1px solid var(--red);
}

.query-result-message.loading {
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
}

@media (max-width: 560px) {
  .query-result-item-value { font-size: 1.6rem; }
}

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.rates-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  min-width: 420px;
}

.rates-table th {
  text-align: left;
  font-weight: 600;
  color: var(--text-muted);
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

.rates-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

.rates-table tbody tr:hover { background: rgba(127, 161, 255, 0.06); }
.rates-table tbody tr.is-today { background: rgba(212, 175, 55, 0.10); font-weight: 700; }
.rates-table tbody tr:last-child td { border-bottom: none; }

.table-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 20px 0;
}

.footer {
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 28px;
}

@media (max-width: 560px) {
  .cards { grid-template-columns: 1fr; }
  .brand h1 { font-size: 1.15rem; }
  .app { padding: 18px 14px 36px; }
}

@media (prefers-reduced-motion: reduce) {
  .btn-refresh.is-loading #refresh-icon { animation: none; }
  .btn { transition: none; }
}