:root {
  --bg0: #0c1a1f;
  --bg1: #132a32;
  --panel: rgba(232, 241, 239, 0.94);
  --panel-border: rgba(18, 52, 58, 0.12);
  --ink: #12282e;
  --muted: #4a6670;
  --accent: #0d7a6f;
  --accent-hover: #0a635a;
  --accent-soft: #d7efe9;
  --warn: #9a6b12;
  --warn-bg: #f7ecd2;
  --error: #a12d2d;
  --error-bg: #f8e4e4;
  --ok: #1a6b4a;
  --line: rgba(18, 40, 46, 0.12);
  --shadow: 0 18px 50px rgba(6, 22, 28, 0.28);
  --radius: 14px;
  --font-display: "Outfit", system-ui, sans-serif;
  --font-body: "Source Sans 3", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg0);
  line-height: 1.45;
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 90% 60% at 12% -10%, #1f5c57 0%, transparent 55%),
    radial-gradient(ellipse 70% 50% at 90% 10%, #2a4a6a 0%, transparent 50%),
    linear-gradient(165deg, var(--bg0), var(--bg1) 55%, #0a1418);
}

.bg::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.07;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80'%3E%3Cpath d='M0 40h80M40 0v80' stroke='%23fff' stroke-width='1' fill='none'/%3E%3C/svg%3E");
  background-size: 80px 80px;
}

.top {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.75rem 1.25rem 0.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  animation: fade-up 0.55s ease both;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.brand-mark {
  width: 3rem;
  height: 3rem;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  color: #e8f7f3;
  background: linear-gradient(145deg, #149687, #0b5f58);
  box-shadow: 0 8px 24px rgba(13, 122, 111, 0.35);
}

.brand-name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.45rem, 2.5vw, 1.85rem);
  letter-spacing: -0.02em;
  color: #f2f8f6;
}

.brand-sub {
  margin: 0.15rem 0 0;
  color: #9db5b0;
  font-size: 0.95rem;
}

.api-note {
  margin: 0;
  color: #8fa8a3;
  font-size: 0.9rem;
}

.api-note a {
  color: #b7e4db;
  text-decoration: none;
  border-bottom: 1px solid rgba(183, 228, 219, 0.35);
}

.api-note a:hover {
  color: #e8f7f3;
}

.layout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 2.5rem;
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 1.25rem;
  align-items: start;
}

@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.35rem 1.4rem 1.5rem;
  animation: fade-up 0.65s ease both;
}

.results-panel {
  animation-delay: 0.08s;
}

h1,
h2 {
  font-family: var(--font-display);
  font-weight: 650;
  letter-spacing: -0.02em;
  margin: 0 0 0.45rem;
}

h1 {
  font-size: 1.35rem;
}

h2 {
  font-size: 1.2rem;
}

.lede {
  margin: 0 0 1.1rem;
  color: var(--muted);
  font-size: 0.98rem;
}

.lede code {
  font-size: 0.9em;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.field-label {
  display: block;
  font-weight: 600;
  font-size: 0.92rem;
  margin-bottom: 0.4rem;
}

.format-row {
  margin-bottom: 1.1rem;
}

.format-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
}

.format-controls select {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink);
  background: #fbfefd;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 0.55rem 0.85rem;
  min-width: min(100%, 16rem);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.format-controls select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(13, 122, 111, 0.18);
}

.format-badge {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}

.format-badge.manual {
  background: var(--warn-bg);
  color: var(--warn);
}

textarea {
  width: 100%;
  resize: vertical;
  min-height: 12rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--ink);
  background: #fbfefd;
  transition: border-color 0.2s, box-shadow 0.2s;
}

textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(13, 122, 111, 0.18);
}

.hint {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}

.btn {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  border-radius: 9px;
  padding: 0.65rem 1.1rem;
  cursor: pointer;
  transition: background 0.18s, transform 0.15s, opacity 0.18s;
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.btn.primary {
  background: var(--accent);
  color: #f4fffc;
}

.btn.primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

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

.btn.ghost:hover:not(:disabled) {
  background: rgba(13, 122, 111, 0.08);
}

.btn.small {
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
}

.status {
  min-height: 1.35rem;
  margin: 0.85rem 0 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.status.error {
  color: var(--error);
}

.status.ok {
  color: var(--ok);
}

.results-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.empty {
  color: var(--muted);
  padding: 1.5rem 0.25rem;
  font-size: 0.98rem;
}

.rates {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.rates th,
.rates td {
  text-align: left;
  padding: 0.65rem 0.55rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.rates th {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.rates td.rate {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

.badge {
  display: inline-block;
  font-size: 0.8rem;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}

.badge.warn {
  background: var(--warn-bg);
  color: var(--warn);
}

.badge.error {
  background: var(--error-bg);
  color: var(--error);
}

.row-error td {
  color: var(--error);
}

.foot {
  max-width: 1100px;
  margin: 0 auto 2rem;
  padding: 0 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  color: #7f9893;
  font-size: 0.85rem;
  animation: fade-up 0.7s ease both;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}