:root {
  --bg:       #0d0d18;
  --card:     #161625;
  --border:   #252540;
  --text:     #e2e8f0;
  --muted:    #7a849a;
  --accent:   #00d4aa;
  --bch:      #4ccd6b;
  --xmr:      #f26822;
  --danger:   #ef4444;
  --warning:  #f59e0b;
  --radius:   12px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
}

/* ── Header ─────────────────────────────────────────────────────────── */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  border-bottom: 1px solid var(--border);
}
.logo { font-size: 1.4rem; font-weight: 700; letter-spacing: -0.5px; }
.logo span.xmr { color: var(--xmr); }
.logo span.sep { color: var(--muted); margin: 0 2px; }
.logo span.bch { color: var(--bch); }
.tagline { color: var(--muted); font-size: 0.85rem; }

/* ── Rates bar ───────────────────────────────────────────────────────── */
#rates-bar {
  display: flex;
  gap: 32px;
  padding: 12px 32px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  flex-wrap: wrap;
}
.rate-item { display: flex; gap: 8px; align-items: center; }
.rate-label { color: var(--muted); }
.rate-value { font-weight: 600; }
.rate-value.bch { color: var(--bch); }
.rate-value.xmr { color: var(--xmr); }
#rates-updated { margin-left: auto; color: var(--muted); font-size: 0.78rem; }

/* ── Main layout ─────────────────────────────────────────────────────── */
main {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  gap: 18px;
  padding: 40px 16px 80px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  width: 100%;
  max-width: 480px;
}

/* ── Direction toggle ────────────────────────────────────────────────── */
.direction-toggle {
  display: flex;
  background: var(--bg);
  border-radius: 8px;
  padding: 4px;
  margin-bottom: 28px;
}
.dir-btn {
  flex: 1;
  padding: 10px;
  border: none;
  background: transparent;
  color: var(--muted);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.15s;
}
.dir-btn.active {
  background: var(--border);
  color: var(--text);
}
.dir-btn .cur-bch { color: var(--bch); }
.dir-btn .cur-xmr { color: var(--xmr); }

/* ── Form fields ─────────────────────────────────────────────────────── */
.field-group { margin-bottom: 20px; }
.field-label {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}
.input-row { display: flex; gap: 8px; }
.input-row input { flex: 1; }
input, textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 12px 14px;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.15s;
}
input:focus { border-color: var(--accent); }
.input-currency {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 0.9rem;
  font-weight: 700;
  min-width: 60px;
  color: var(--text);
}

/* Max button */
.btn-max {
  padding: 12px 14px;
  background: var(--border);
  border: none;
  border-radius: 8px;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  letter-spacing: 0.5px;
}
.btn-max:hover { background: #303055; }

/* Receive row */
.receive-display {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.receive-amount { font-size: 1.1rem; font-weight: 700; }
.receive-currency { font-size: 0.85rem; color: var(--muted); }

/* Max available hint */
.field-hint {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 6px;
}

/* Rate info */
.rate-info {
  background: var(--bg);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 20px;
  line-height: 1.6;
}
.rate-info span { color: var(--text); font-weight: 600; }

/* Swap button */
.btn-swap {
  width: 100%;
  padding: 15px;
  background: var(--accent);
  border: none;
  border-radius: 10px;
  color: #0a0a14;
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
  letter-spacing: 0.5px;
  transition: opacity 0.15s;
}
.btn-swap:hover { opacity: 0.9; }
.btn-swap:disabled { opacity: 0.4; cursor: not-allowed; }

/* ── Deposit panel ───────────────────────────────────────────────────── */
#deposit-panel, #complete-panel { display: none; }

.panel-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.panel-sub {
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 24px;
}
.send-amount-big {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 20px;
}
.send-amount-big .curr { font-size: 1rem; color: var(--muted); margin-left: 4px; }

#qr-container {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}
#qr-code { background: #fff; padding: 10px; border-radius: 8px; }

.address-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  font-family: monospace;
  font-size: 0.82rem;
  word-break: break-all;
  margin-bottom: 10px;
  cursor: pointer;
  transition: border-color 0.15s;
}
.address-box:hover { border-color: var(--accent); }
.copy-hint { font-size: 0.75rem; color: var(--muted); text-align: center; margin-bottom: 20px; }

.meta-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  margin-bottom: 8px;
}
.meta-row .k { color: var(--muted); }
.meta-row .v { font-weight: 600; }

/* Status indicator */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-top: 20px;
  width: 100%;
  justify-content: center;
}
.status-pending  { background: rgba(245,158,11,0.12); color: var(--warning); }
.status-received { background: rgba(0,212,170,0.12); color: var(--accent); }
.status-sending  { background: rgba(0,212,170,0.12); color: var(--accent); }
.status-complete { background: rgba(76,205,107,0.12); color: var(--bch); }
.status-failed   { background: rgba(239,68,68,0.12); color: var(--danger); }
.status-expired  { background: rgba(122,132,154,0.12); color: var(--muted); }

.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: currentColor;
}
.dot.pulse { animation: pulse 1.5s infinite; }
@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.4; transform: scale(0.8); }
}

#countdown {
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
  margin-top: 8px;
}

/* ── Complete panel ──────────────────────────────────────────────────── */
.success-icon {
  font-size: 3rem;
  text-align: center;
  margin-bottom: 12px;
}
.tx-hash {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: monospace;
  font-size: 0.75rem;
  word-break: break-all;
  color: var(--muted);
  margin: 12px 0;
}
.btn-new {
  width: 100%;
  padding: 13px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 0.95rem;
  cursor: pointer;
  margin-top: 16px;
}
.btn-new:hover { background: var(--border); }

/* ── Donate panel ────────────────────────────────────────────────────── */
.donate-card {
  max-width: 680px;
  text-align: center;
}
.donate-section {
  padding: 12px 16px 36px;
  display: flex;
  justify-content: center;
}
.donate-title {
  letter-spacing: 0.8px;
}
.donate-grid {
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  gap: 14px;
}
.donate-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.donate-coin {
  font-weight: 700;
  margin-bottom: 10px;
}
.donate-qr-image {
  display: block;
  width: 160px;
  height: 160px;
  background: #fff;
  border-radius: 8px;
  padding: 8px;
  margin-bottom: 10px;
}
.donate-address {
  cursor: default;
  text-align: center;
}

/* ── Contact panel ───────────────────────────────────────────────────── */
.contact-section {
  padding: 0 16px 28px;
  display: flex;
  justify-content: center;
}
.contact-card {
  max-width: 680px;
  text-align: center;
}
.contact-title {
  letter-spacing: 0.8px;
}
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.contact-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 80px;
  justify-content: center;
  transition: border-color 0.15s, transform 0.15s;
}
.contact-item:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}
.contact-badge {
  font-size: 0.72rem;
  letter-spacing: 0.7px;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 6px;
}
.contact-value {
  font-size: 0.9rem;
  font-weight: 600;
  word-break: break-word;
}

/* ── Errors ──────────────────────────────────────────────────────────── */
.error-msg {
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.3);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.85rem;
  color: var(--danger);
  margin-bottom: 16px;
  display: none;
}

/* ── Footer ──────────────────────────────────────────────────────────── */
footer {
  text-align: center;
  padding: 20px;
  color: var(--muted);
  font-size: 0.78rem;
  border-top: 1px solid var(--border);
}

@media (max-width: 640px) {
  .donate-card {
    max-width: 480px;
  }
  .contact-card {
    max-width: 480px;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
}