* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0a0e14;
  --surface: #131920;
  --border: #1e2a36;
  --text: #e6edf3;
  --text-dim: #6e7a88;
  --accent: #00d4ff;
  --green: #00e676;
  --red: #ff5252;
  --orange: #ffa726;
  --purple: #b388ff;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* Header */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  gap: 16px;
  flex-wrap: wrap;
}

.header-left h1 { font-size: 1.2rem; font-weight: 700; }
.header-left .tag {
  background: var(--accent);
  color: #000;
  font-size: 0.6rem;
  padding: 2px 6px;
  border-radius: 4px;
  vertical-align: middle;
  font-weight: 700;
}

nav { display: flex; gap: 4px; }
.nav-link {
  color: var(--text-dim);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.15s;
}
.nav-link:hover { background: var(--border); color: var(--text); }
.nav-link.active { background: var(--accent); color: #000; }

.header-right { display: flex; align-items: center; gap: 8px; }
#userInfo { font-size: 0.8rem; color: var(--accent); font-family: monospace; }

/* Buttons */
.btn {
  background: var(--accent);
  color: #000;
  border: none;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.85; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-sm { padding: 5px 12px; font-size: 0.8rem; }
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.btn-outline:hover { border-color: var(--text-dim); color: var(--text); }
.btn-green { background: var(--green); color: #000; }
.btn-red { background: var(--red); color: #fff; }
.btn-purple { background: var(--purple); color: #000; }

/* Main */
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

.hidden { display: none !important; }

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

/* Ad list */
.ad-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: border-color 0.15s;
}
.ad-card:hover { border-color: var(--accent); }

.ad-info { flex: 1; }
.ad-info .type-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  text-transform: uppercase;
}
.type-badge.sell { background: var(--red); color: #fff; }
.type-badge.buy { background: var(--green); color: #000; }

.ad-price {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  margin: 4px 0;
}
.ad-detail { font-size: 0.8rem; color: var(--text-dim); }
.ad-addr { font-family: monospace; font-size: 0.75rem; color: var(--text-dim); }

/* Trade status */
.trade-status {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  text-transform: uppercase;
}
.trade-status.negotiating { background: var(--orange); color: #000; }
.trade-status.hash_published { background: var(--purple); color: #000; }
.trade-status.btct_locked { background: var(--accent); color: #000; }
.trade-status.doge_locked { background: var(--accent); color: #000; }
.trade-status.seller_redeemed { background: var(--green); color: #000; }
.trade-status.completed { background: var(--green); color: #000; }
.trade-status.expired, .trade-status.cancelled { background: var(--text-dim); color: #000; }

/* Swap Steps */
.swap-steps {
  display: flex;
  gap: 0;
  margin: 20px 0;
}
.swap-step {
  flex: 1;
  text-align: center;
  padding: 12px 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-dim);
  position: relative;
}
.swap-step:first-child { border-radius: 8px 0 0 8px; }
.swap-step:last-child { border-radius: 0 8px 8px 0; }
.swap-step.active {
  background: rgba(0, 212, 255, 0.1);
  border-color: var(--accent);
  color: var(--accent);
}
.swap-step.done {
  background: rgba(0, 230, 118, 0.1);
  border-color: var(--green);
  color: var(--green);
}
.swap-step .step-num {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

/* Action box */
.action-box {
  background: var(--bg);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 20px;
  margin: 16px 0;
  text-align: center;
}
.action-box h4 {
  color: var(--accent);
  margin-bottom: 12px;
}
.action-box .addr-display {
  font-family: monospace;
  font-size: 0.85rem;
  word-break: break-all;
  color: var(--accent);
  background: var(--surface);
  padding: 10px;
  border-radius: 6px;
  margin: 8px 0;
  cursor: pointer;
}
.action-box p { font-size: 0.8rem; color: var(--text-dim); margin: 8px 0; }

/* Info box */
.info-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
  margin: 8px 0;
  font-size: 0.85rem;
}

/* Chat */
.chat-section { margin-top: 20px; border-top: 1px solid var(--border); padding-top: 16px; }
.chat-messages { max-height: 200px; overflow-y: auto; margin-bottom: 10px; }
.chat-msg { margin-bottom: 6px; font-size: 0.82rem; }
.chat-msg .sender { color: var(--accent); font-family: monospace; font-size: 0.72rem; }
.chat-msg .time { color: var(--text-dim); font-size: 0.7rem; margin-left: 6px; }
.chat-input { display: flex; gap: 8px; }
.chat-input input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.85rem;
}
.chat-input input:focus { outline: none; border-color: var(--accent); }

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.7);
}
.modal-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  width: 90%;
  max-width: 420px;
}
.modal-content h3 { margin-bottom: 16px; }
.modal-content label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 12px;
}
.modal-content input, .modal-content select {
  display: block;
  width: 100%;
  margin-top: 4px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.9rem;
}
.modal-content input:focus, .modal-content select:focus {
  outline: none;
  border-color: var(--accent);
}
.modal-actions { display: flex; gap: 8px; margin-top: 16px; }

/* Wallet */
.wallet-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 16px;
}
.wallet-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}
.wallet-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.wallet-coin-name {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
}
.wallet-coin-label {
  font-size: 0.8rem;
  color: var(--text-dim);
}
.wallet-balance {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
  padding: 14px;
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.balance-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.balance-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--green);
  font-family: monospace;
}
.wallet-section { margin-bottom: 12px; }
.wallet-section label { font-size: 0.85rem; color: var(--text-dim); }
.address-box {
  font-family: monospace;
  font-size: 0.8rem;
  word-break: break-all;
  padding: 10px;
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--accent);
  border-radius: 6px;
  color: var(--accent);
  cursor: pointer;
  margin: 6px 0;
}
.wallet-select {
  width: 100%;
  padding: 8px 10px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.85rem;
  font-family: monospace;
  cursor: pointer;
  margin-top: 6px;
}
.wallet-select option { background: var(--bg); color: var(--text); }
.wallet-select:focus { outline: none; border-color: var(--accent); }
.wallet-actions { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.wallet-actions .btn { flex: 1; min-width: 100px; font-size: 0.8rem; padding: 6px 10px; }
.wallet-backup-box {
  background: rgba(0,0,0,0.3);
  border: 1px solid #f0ad4e;
  border-radius: 8px;
  padding: 14px;
  margin-top: 10px;
}
.wallet-backup-box h4 { color: #f0ad4e; margin: 0 0 8px; font-size: 0.95rem; }
.wif-display {
  word-break: break-all;
  font-size: 0.8rem;
  cursor: pointer;
  user-select: all;
}
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--text-dim);
  cursor: pointer;
}
.checkbox-label input[type="checkbox"] { width: 18px; height: 18px; cursor: pointer; }
.divider { border: none; border-top: 1px solid var(--border); margin: 14px 0; }
.fee-notice { color: #f0ad4e; margin-top: 6px; }
.btn-full { width: 100%; }
.btn-danger { border-color: #e74c3c !important; color: #e74c3c !important; background: rgba(231, 76, 60, 0.1) !important; }
.btn-danger:hover { background: #e74c3c !important; color: #fff !important; }
.help-box {
  background: rgba(240, 173, 78, 0.1);
  border: 1px solid rgba(240, 173, 78, 0.3);
  border-radius: 6px;
  padding: 12px;
  margin: 8px 0;
  font-size: 0.85rem;
  line-height: 1.5;
}
.help-box p { margin: 6px 0; }
.help-box ul { margin: 4px 0 8px 20px; padding: 0; }
.help-box li { margin: 4px 0; }
details summary { cursor: pointer; color: var(--text-dim); }
details summary:hover { color: var(--text); }
.wallet-card input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.9rem;
  margin-top: 4px;
}
.wallet-card input:focus { outline: none; border-color: var(--accent); }

.mono { font-family: monospace; }
.dim { color: var(--text-dim); }
.small { font-size: 0.8rem; }
.error-text { color: var(--red); }
.success-text { color: var(--green); }
.empty { text-align: center; padding: 40px; color: var(--text-dim); }

/* Responsive */
@media (max-width: 768px) {
  header { padding: 10px 12px; }
  main { padding: 16px 10px; }
  .wallet-cards { grid-template-columns: 1fr; }
  .swap-steps { flex-direction: column; }
  .swap-step:first-child { border-radius: 8px 8px 0 0; }
  .swap-step:last-child { border-radius: 0 0 8px 8px; }
  .ad-card { flex-direction: column; align-items: flex-start; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .admin-table { font-size: 0.75rem; }
}

/* ===================== ADMIN ===================== */

.admin-login-box {
  max-width: 360px;
  margin: 80px auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
}
.admin-login-box h2 {
  margin-bottom: 20px;
  text-align: center;
}
.admin-login-box label {
  display: block;
  margin-bottom: 14px;
  font-size: 0.85rem;
  color: var(--text-dim);
}
.admin-login-box input {
  width: 100%;
  margin-top: 4px;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.95rem;
}
.admin-login-box .btn {
  width: 100%;
  margin-top: 8px;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.admin-header h2 { margin: 0; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  text-align: center;
}
.stat-card.wide { grid-column: span 1; }
.stat-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
}
.stat-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 4px;
}

.admin-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}
.admin-tab {
  padding: 8px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
}
.admin-tab:hover { border-color: var(--accent); color: var(--text); }
.admin-tab.active { background: var(--accent); color: #000; border-color: var(--accent); }

.admin-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  font-size: 0.85rem;
}
.admin-table th, .admin-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.admin-table th {
  background: rgba(255,255,255,0.03);
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
}
.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover { background: rgba(255,255,255,0.02); }
.row-deleted { opacity: 0.4; }

.badge { padding: 2px 8px; border-radius: 4px; font-size: 0.75rem; font-weight: 600; }
.badge-buy, .badge-active { background: rgba(0,200,83,0.15); color: var(--green); }
.badge-sell, .badge-cancelled, .badge-deleted, .badge-expired { background: rgba(255,82,82,0.15); color: var(--red); }
.badge-completed { background: rgba(0,176,255,0.15); color: var(--accent); }
.badge-closed, .badge-unknown { background: rgba(255,255,255,0.08); color: var(--text-dim); }

.btn-red { background: var(--red); color: #fff; }
.btn-red:hover { opacity: 0.85; }