:root {
  --bg: #0c0f14;
  --surface: #151a23;
  --border: #2a3344;
  --text: #e8edf5;
  --muted: #8b98ad;
  --accent: #3dffa8;
  --accent-dim: #1a9d62;
  --danger: #ff6b6b;
  --radius: 12px;
  font-family: "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(ellipse 80% 50% at 50% -20%, #1a2e28, var(--bg));
  color: var(--text);
  line-height: 1.5;
}

.wrap {
  max-width: 560px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

header {
  margin-bottom: 2rem;
}

header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 0.35rem;
  letter-spacing: -0.02em;
}

header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
}

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

input,
select {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 1rem;
}

input:focus,
select:focus {
  outline: 2px solid var(--accent-dim);
  border-color: var(--accent-dim);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 0.85rem 1rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--accent);
  color: #061410;
  transition: filter 0.15s;
}

.btn:hover {
  filter: brightness(1.05);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  margin-top: 0.5rem;
}

.amount-row {
  display: grid;
  grid-template-columns: 1fr 100px;
  gap: 0.75rem;
}

.alert {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.alert-error {
  background: rgba(255, 107, 107, 0.12);
  border: 1px solid rgba(255, 107, 107, 0.35);
  color: #ffb4b4;
}

.alert-info {
  background: rgba(61, 255, 168, 0.08);
  border: 1px solid rgba(61, 255, 168, 0.25);
  color: var(--accent);
}

.providers {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 1rem 0;
}

.provider-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.85rem 1rem;
  text-align: left;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  cursor: pointer;
  font-size: 0.95rem;
}

.provider-btn:hover {
  border-color: var(--accent-dim);
}

.provider-btn.recommended {
  border-color: var(--accent-dim);
}

.provider-btn span.meta {
  font-size: 0.8rem;
  color: var(--muted);
}

.summary {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
}

.summary-sub {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 1rem auto;
}

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

footer {
  margin-top: 2rem;
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
}

footer code {
  font-size: 0.75rem;
  color: var(--accent);
}