:root {
  --bg: #0f1419;
  --card: #1a222d;
  --border: #2a3544;
  --text: #f0f4f8;
  --muted: #9aa8b8;
  --accent: #00b1ea;
  --accent-dark: #0090c0;
  --accent-soft: rgba(0, 177, 234, 0.12);
  --success: #00a650;
  --error: #ff6b6b;
  --radius: 14px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  color: var(--text);
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 177, 234, 0.18), transparent),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(0, 166, 80, 0.08), transparent),
    var(--bg);
}

.card {
  width: 100%;
  max-width: 440px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  padding: 28px 24px 20px;
  box-shadow: var(--shadow);
}

.header {
  text-align: center;
  margin-bottom: 24px;
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(0, 177, 234, 0.25);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}

h1 {
  margin: 0 0 8px;
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.45;
}

.field-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.optional {
  font-weight: 400;
  color: var(--muted);
}

.amounts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}

.amount-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: #121820;
  color: var(--text);
  font: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 12px 8px;
  border-radius: 10px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.amount-btn:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.amount-btn.active {
  border-color: var(--accent);
  background: var(--accent);
  color: #041018;
}

.custom-amount {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #121820;
  overflow: hidden;
  transition: border-color 0.15s;
}

.custom-amount:focus-within {
  border-color: var(--accent);
}

.currency-prefix {
  padding: 0 4px 0 14px;
  color: var(--muted);
  font-weight: 600;
  font-size: 1.1rem;
}

.custom-amount input,
.optional-fields input,
.optional-fields textarea {
  width: 100%;
  border: none;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 1.15rem;
  font-weight: 600;
  padding: 12px 14px 12px 6px;
  outline: none;
}

.optional-fields input,
.optional-fields textarea {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #121820;
  font-size: 0.95rem;
  font-weight: 400;
  padding: 11px 14px;
  margin-bottom: 12px;
  resize: vertical;
}

.optional-fields input:focus,
.optional-fields textarea:focus {
  border-color: var(--accent);
}

.optional-fields .field-label {
  margin-top: 4px;
}

.summary {
  text-align: center;
  color: var(--muted);
  font-size: 0.95rem;
  margin: 8px 0 16px;
}

.summary strong {
  color: var(--text);
  font-size: 1.2rem;
}

.donate-btn {
  width: 100%;
  border: none;
  border-radius: 12px;
  padding: 14px 18px;
  font: inherit;
  font-size: 1.05rem;
  font-weight: 700;
  color: #041018;
  background: linear-gradient(180deg, #00c2ff 0%, var(--accent) 100%);
  cursor: pointer;
  transition: transform 0.12s, filter 0.12s, opacity 0.12s;
  box-shadow: 0 8px 24px rgba(0, 177, 234, 0.28);
}

.donate-btn:hover:not(:disabled) {
  filter: brightness(1.06);
  transform: translateY(-1px);
}

.donate-btn:active:not(:disabled) {
  transform: translateY(0);
}

.donate-btn:disabled {
  opacity: 0.65;
  cursor: wait;
}

.error {
  margin: 12px 0 0;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(255, 107, 107, 0.12);
  border: 1px solid rgba(255, 107, 107, 0.35);
  color: var(--error);
  font-size: 0.9rem;
  line-height: 1.4;
}

.hint {
  margin: 14px 0 0;
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
  line-height: 1.4;
}

.footer {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
  display: flex;
  gap: 6px;
  justify-content: center;
  align-items: center;
}

.footer strong {
  color: var(--text);
}

.mode-label {
  margin-left: 4px;
  font-size: 0.75rem;
  opacity: 0.85;
}

.env-badge {
  margin: 12px 0 0;
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 999px;
}

.env-badge.ok {
  color: #7dffa3;
  background: rgba(0, 166, 80, 0.15);
  border: 1px solid rgba(0, 166, 80, 0.35);
}

.env-badge.warn {
  color: #ffd37a;
  background: rgba(255, 180, 0, 0.12);
  border: 1px solid rgba(255, 180, 0, 0.35);
}

.payment-header {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.back-btn {
  align-self: flex-start;
  appearance: none;
  border: none;
  background: transparent;
  color: var(--accent);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
}

.back-btn:hover {
  text-decoration: underline;
}

.pay-summary {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.pay-summary strong {
  color: var(--text);
  font-size: 1.15rem;
}

#paymentBrick_container {
  min-height: 120px;
  margin-top: 4px;
}

.result-detail {
  font-size: 0.85rem !important;
  word-break: break-all;
}

.debug-log-fixed {
  width: 100%;
  max-width: 440px;
  margin: 16px auto 40px;
}

.debug-log {
  margin-top: 18px;
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  background: #0d1218;
}

.last-payment-error {
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: 10px;
  background: rgba(255, 107, 107, 0.12);
  border: 1px solid rgba(255, 107, 107, 0.4);
  color: #ffb4b4;
  font-size: 0.85rem;
}

.last-payment-error strong {
  display: block;
  margin-bottom: 8px;
  color: #ff8f8f;
}

.last-payment-error pre {
  margin: 0 0 10px;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.75rem;
  max-height: 160px;
  overflow: auto;
  color: #ffd0d0;
}

.btn-ghost-sm {
  appearance: none;
  border: 1px solid rgba(255, 107, 107, 0.4);
  background: transparent;
  color: #ffb4b4;
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
}

.debug-log summary {
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  user-select: none;
}

.debug-log-actions {
  display: flex;
  gap: 8px;
  margin: 10px 0 8px;
}

.debug-log-actions button {
  appearance: none;
  border: 1px solid var(--border);
  background: #121820;
  color: var(--text);
  font: inherit;
  font-size: 0.8rem;
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
}

.debug-log-actions button:hover {
  border-color: var(--accent);
}

#debug-log-body {
  margin: 0;
  max-height: 280px;
  overflow: auto;
  font-size: 0.72rem;
  line-height: 1.35;
  color: #b8c4d0;
  white-space: pre-wrap;
  word-break: break-word;
}

.full-input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #121820;
  color: var(--text);
  font: inherit;
  font-size: 0.95rem;
  padding: 11px 14px;
  margin-bottom: 12px;
  outline: none;
}

.full-input:focus {
  border-color: var(--accent);
}

.footer-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.footer-link:hover {
  text-decoration: underline;
}

.user-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  align-items: center;
  margin-bottom: 12px;
  font-size: 0.85rem;
  color: var(--muted);
}

.user-bar strong {
  color: var(--text);
}

.user-bar a,
.user-bar button.linkish {
  color: var(--accent);
  background: none;
  border: none;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  padding: 0;
}

.user-bar a:hover,
.user-bar button.linkish:hover {
  text-decoration: underline;
}

/* Result pages */
.result {
  text-align: center;
  padding: 12px 0 8px;
}

.result-icon {
  font-size: 2.5rem;
  margin-bottom: 8px;
}

.result h1 {
  font-size: 1.4rem;
}

.result p {
  color: var(--muted);
  line-height: 1.5;
}

.result a {
  display: inline-block;
  margin-top: 16px;
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.result a:hover {
  text-decoration: underline;
}

@media (max-width: 400px) {
  .amounts {
    grid-template-columns: repeat(2, 1fr);
  }
}