@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;600&display=swap');

:root {
  --bg-1: #08090c;
  --card: #ffffff;
  --card-2: #f4f5f7;
  --field-bg: #f3f4f6;
  --border: #e6e7eb;
  --border-soft: #edeef1;
  --text: #16171c;
  --text-inverse: #f5f5f7;
  --muted: #6b7280;
  --muted-2: #9aa1ae;
  --muted-inverse: #a9adb8;
  --accent: #ff5b2e;
  --accent-2: #ff3d1a;
  --accent-glow: rgba(255, 91, 46, 0.30);
  --success: #16a34a;
  --danger: #e0324c;
  --warning: #d68a1a;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-inverse);
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% 0%, rgba(255, 91, 46, 0.18), transparent 45%),
    radial-gradient(circle at 85% 15%, rgba(255, 61, 26, 0.10), transparent 40%),
    var(--bg-1);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.wrap { width: 100%; max-width: 460px; }

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  padding: 0 4px;
}

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 12px var(--accent-glow);
}

.brand-name { font-weight: 800; letter-spacing: -0.02em; font-size: 15px; }

.brand-tag {
  margin-left: auto;
  font-size: 11px;
  color: var(--muted-inverse);
  border: 1px solid rgba(255,255,255,0.14);
  padding: 3px 8px;
  border-radius: 20px;
  font-family: 'JetBrains Mono', monospace;
}

.card {
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.6);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,91,46,0.05), transparent 60%);
  pointer-events: none;
}

h1 { font-size: 21px; font-weight: 700; margin: 0 0 4px; letter-spacing: -0.02em; }

.sub { color: var(--muted); font-size: 13.5px; margin-bottom: 26px; line-height: 1.5; }

label {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--muted);
  margin: 18px 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
label:first-of-type { margin-top: 0; }

input[type="number"], input[type="text"] {
  width: 100%;
  padding: 14px 16px;
  background: var(--field-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
  -webkit-appearance: none;
  appearance: none;
}

input::placeholder { color: var(--muted-2); }

input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.btn {
  width: 100%;
  margin-top: 26px;
  padding: 15px;
  border: none;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.2s, opacity 0.2s;
  box-shadow: 0 8px 24px var(--accent-glow);
  font-family: inherit;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 12px 30px var(--accent-glow); }
.btn:active:not(:disabled) { transform: translateY(0); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; box-shadow: none; }

.error-msg {
  color: var(--danger);
  font-size: 13px;
  margin-top: 14px;
  display: none;
  padding: 10px 12px;
  background: rgba(224, 50, 76, 0.08);
  border: 1px solid rgba(224, 50, 76, 0.25);
  border-radius: var(--radius-sm);
}

.footer-note {
  text-align: center;
  font-size: 11.5px;
  color: var(--muted-inverse);
  margin-top: 18px;
  line-height: 1.6;
}

.pay-header { text-align: center; margin-bottom: 22px; }

.order-ref {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--muted-2);
  letter-spacing: 0.03em;
}

.order-amount-display {
  text-align: center;
  margin: 4px 0 26px;
}

.order-amount-display .value {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-family: 'JetBrains Mono', monospace;
}

.order-amount-display .cur {
  font-size: 14px;
  color: var(--muted);
  margin-left: 6px;
  font-weight: 600;
}

/* Currency picker trigger */
.picker-label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

.currency-select {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--field-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  text-align: left;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.currency-select:hover { border-color: var(--muted-2); }
.currency-select:focus-visible { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }

.cs-coin {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.cs-text { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.cs-code { font-size: 15px; font-weight: 700; }
.cs-net { font-size: 12px; color: var(--muted-2); }

.cs-chevron { color: var(--muted-2); flex-shrink: 0; }

/* Bottom sheet / modal coin picker */
.coin-sheet {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.18s ease;
}
.coin-sheet.open { visibility: visible; opacity: 1; }

.coin-sheet-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 3, 6, 0.72);
  backdrop-filter: blur(2px);
}

.coin-sheet-panel {
  position: relative;
  width: 100%;
  max-width: 460px;
  max-height: 78vh;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: 22px 22px 0 0;
  padding: 10px 20px 20px;
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform 0.22s cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: 0 -20px 60px rgba(0,0,0,0.5);
}
.coin-sheet.open .coin-sheet-panel { transform: translateY(0); }

.coin-sheet-handle {
  width: 36px;
  height: 4px;
  border-radius: 3px;
  background: var(--border);
  margin: 4px auto 14px;
}

.coin-search-wrap {
  position: relative;
  margin-bottom: 14px;
  flex-shrink: 0;
}

.coin-search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted-2);
  pointer-events: none;
}

#coinSearchInput {
  width: 100%;
  padding: 13px 14px 13px 40px;
  background: var(--field-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14.5px;
  font-family: inherit;
}
#coinSearchInput:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
#coinSearchInput::placeholder { color: var(--muted-2); }

.coin-list-heading {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--muted-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
  flex-shrink: 0;
}

.coin-list {
  overflow-y: auto;
  flex: 1;
  margin: 0 -8px;
  padding: 0 8px;
}

.coin-row {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 10px 8px;
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  color: var(--text);
  transition: background 0.12s;
}
.coin-row:hover { background: var(--card-2); }
.coin-row.active { background: rgba(255,91,46,0.10); }

.coin-row-icon {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10.5px;
  font-weight: 800;
  color: #ffffff;
}

.coin-row-body {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.coin-row-code { font-size: 14.5px; font-weight: 700; flex-shrink: 0; }
.coin-row-label {
  font-size: 13.5px;
  color: var(--muted);
  text-align: right;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.coin-row-check {
  color: var(--accent);
  flex-shrink: 0;
  display: none;
}
.coin-row.active .coin-row-check { display: block; }

.coin-empty {
  text-align: center;
  color: var(--muted-2);
  font-size: 13px;
  padding: 30px 0;
}

@media (max-width: 380px) {
  .coin-sheet-panel { max-height: 82vh; }
}

.qr-wrap { display: flex; justify-content: center; margin: 22px 0; }

.qr-box {
  background: white;
  padding: 18px;
  border-radius: var(--radius-md);
  box-shadow: 0 0 0 1px var(--border), 0 20px 40px rgba(0,0,0,0.4);
  line-height: 0;
}

.amount-block { text-align: center; }

.amount-value {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  word-break: break-all;
  font-family: 'JetBrains Mono', monospace;
}

.amount-tag {
  display: inline-block;
  background: var(--card-2);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  margin-top: 8px;
}

.fiat-hint { font-size: 12.5px; color: var(--muted-2); margin-top: 6px; }

.address-box {
  background: var(--field-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 13px;
  font-family: 'JetBrains Mono', monospace;
  word-break: break-all;
  margin: 18px 0 4px;
  cursor: pointer;
  transition: border-color 0.15s;
}
.address-box:hover { border-color: var(--muted-2); }
.address-box:active { border-color: var(--accent); }

.copy-hint { font-size: 11.5px; color: var(--muted-2); text-align: center; margin-bottom: 4px; }

.status-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  padding: 12px;
  border-radius: var(--radius-sm);
  background: var(--card-2);
  border: 1px solid var(--border);
  margin-top: 20px;
}

.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--muted-2); flex-shrink: 0; }
.dot.waiting { background: var(--warning); animation: pulse 1.3s infinite; }
.dot.confirming, .dot.confirmed, .dot.sending { background: #2f8fe0; animation: pulse 1.3s infinite; }
.dot.finished { background: var(--success); }
.dot.failed, .dot.expired, .dot.refunded { background: var(--danger); }

@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

.security-note {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 11.5px;
  color: var(--muted);
  margin-top: 20px;
  padding: 12px;
  background: var(--card-2);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  line-height: 1.5;
}

.back-link {
  display: block;
  text-align: center;
  margin-top: 18px;
  color: var(--muted-2);
  font-size: 12.5px;
  cursor: pointer;
  text-decoration: none;
}
.back-link:hover { color: var(--muted); }

.success-check {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: rgba(22, 163, 74, 0.10);
  border: 1px solid rgba(22, 163, 74, 0.30);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px;
}

.spinner {
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,0.25);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

.not-found-card { text-align: center; padding: 48px 32px; }

.state-block { text-align: center; padding: 40px 0; }

@media (max-width: 380px) {
  .card { padding: 24px; }
  .amount-value { font-size: 24px; }
  .order-amount-display .value { font-size: 28px; }
}