@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;600;700&family=Syne:wght@400;600;700;800&display=swap');

:root {
  --bg: #0a0a0f;
  --bg2: #111118;
  --bg3: #16161f;
  --border: #1e1e2e;
  --border2: #2a2a3e;
  --accent: #00e5ff;
  --accent2: #7c3aed;
  --green: #00ff87;
  --red: #ff4757;
  --yellow: #ffd32a;
  --text: #e8e8f0;
  --text2: #8888aa;
  --text3: #44445a;
  --card: #111118;
  --glow: 0 0 20px rgba(0, 229, 255, 0.15);
  --glow2: 0 0 40px rgba(0, 229, 255, 0.08);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Syne', sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Subtle grid background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,229,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* ── Layout ── */
.app { display: flex; min-height: 100vh; position: relative; z-index: 1; }

.sidebar {
  width: 240px;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 100;
}

.main { margin-left: 240px; flex: 1; padding: 32px; min-height: 100vh; }

/* ── Sidebar ── */
.sidebar-logo {
  padding: 28px 24px 20px;
  border-bottom: 1px solid var(--border);
}

.logo-text {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.logo-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  color: var(--text3);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-top: 2px;
}

.sidebar-nav { padding: 16px 0; flex: 1; }

.nav-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  color: var(--text3);
  letter-spacing: 3px;
  text-transform: uppercase;
  padding: 8px 24px 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 24px;
  color: var(--text2);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  transition: all 0.2s;
  border-left: 2px solid transparent;
  margin: 1px 0;
}

.nav-item:hover {
  color: var(--text);
  background: rgba(0, 229, 255, 0.04);
  border-left-color: var(--border2);
}

.nav-item.active {
  color: var(--accent);
  background: rgba(0, 229, 255, 0.06);
  border-left-color: var(--accent);
}

.nav-item svg { width: 16px; height: 16px; flex-shrink: 0; }

.sidebar-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
}

.user-pill {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-name {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text2);
}

.logout-link {
  font-size: 0.7rem;
  color: var(--text3);
  text-decoration: none;
  transition: color 0.2s;
}

.logout-link:hover { color: var(--red); }

/* ── Page header ── */
.page-header {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.page-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.5px;
}

.page-title span { color: var(--accent); }

.page-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--text3);
  margin-top: 4px;
}

/* ── Cards ── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

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

.card-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ── Stat cards ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.2s;
}

.stat-card:hover { border-color: var(--border2); }

.stat-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent-grad, linear-gradient(90deg, var(--accent), var(--accent2)));
  opacity: 0.6;
}

.stat-card.green::after { background: var(--green); }
.stat-card.red::after { background: var(--red); }
.stat-card.yellow::after { background: var(--yellow); }
.stat-card.purple::after { background: var(--accent2); }

.stat-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 8px;
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
  letter-spacing: -1px;
}

.stat-value.accent { color: var(--accent); }
.stat-value.green { color: var(--green); }
.stat-value.red { color: var(--red); }
.stat-value.yellow { color: var(--yellow); }

/* ── Tables ── */
.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

thead th {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

tbody td {
  padding: 11px 12px;
  border-bottom: 1px solid rgba(30,30,46,0.6);
  color: var(--text2);
  vertical-align: middle;
}

tbody tr:hover td { background: rgba(255,255,255,0.02); color: var(--text); }

tbody tr:last-child td { border-bottom: none; }

.mono {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
}

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-waiting  { background: rgba(255,211,42,0.12);  color: var(--yellow); }
.badge-received { background: rgba(0,255,135,0.12);   color: var(--green); }
.badge-expired  { background: rgba(136,136,170,0.12); color: var(--text3); }
.badge-cancelled{ background: rgba(255,71,87,0.12);   color: var(--red); }
.badge-pending  { background: rgba(255,211,42,0.12);  color: var(--yellow); }
.badge-confirmed{ background: rgba(0,255,135,0.12);   color: var(--green); }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: 7px;
  font-family: 'Syne', sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #000;
}

.btn-primary:hover {
  background: #33eeff;
  box-shadow: 0 0 16px rgba(0,229,255,0.4);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text2);
  border: 1px solid var(--border2);
}

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

.btn-danger {
  background: transparent;
  color: var(--red);
  border: 1px solid rgba(255,71,87,0.3);
}

.btn-danger:hover { background: rgba(255,71,87,0.1); }

.btn-sm { padding: 5px 12px; font-size: 0.75rem; }

/* ── Forms ── */
.form-group { margin-bottom: 16px; }

.form-label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 10px 14px;
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  transition: border-color 0.2s;
  outline: none;
}

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

.form-input::placeholder { color: var(--text3); }

/* ── Grid layouts ── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }

/* ── Alerts ── */
.alert {
  padding: 12px 16px;
  border-radius: 7px;
  font-size: 0.83rem;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.alert-success { background: rgba(0,255,135,0.08); border: 1px solid rgba(0,255,135,0.2); color: var(--green); }
.alert-error   { background: rgba(255,71,87,0.08);  border: 1px solid rgba(255,71,87,0.2);  color: var(--red); }
.alert-info    { background: rgba(0,229,255,0.08);  border: 1px solid rgba(0,229,255,0.2);  color: var(--accent); }

/* ── Code blocks ── */
.code-block {
  background: #080810;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--accent);
  overflow-x: auto;
  position: relative;
  line-height: 1.7;
}

.code-block .comment { color: var(--text3); }
.code-block .key { color: #ff79c6; }
.code-block .val { color: var(--green); }
.code-block .url { color: var(--yellow); }

.copy-btn {
  position: absolute;
  top: 10px; right: 10px;
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: 5px;
  color: var(--text3);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  padding: 4px 8px;
  cursor: pointer;
  transition: all 0.2s;
}

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

/* ── API key display ── */
.api-key-box {
  background: #080810;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.api-key-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: var(--accent);
  flex: 1;
  letter-spacing: 1px;
  word-break: break-all;
}

/* ── Balance display ── */
.balance-hero {
  text-align: center;
  padding: 40px 20px;
}

.balance-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--text3);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.balance-amount {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -2px;
  line-height: 1;
}

.balance-currency {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem;
  color: var(--text3);
  margin-left: 4px;
}

/* ── USDT address ── */
.usdt-box {
  background: #080810;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
}

.usdt-address {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--yellow);
  word-break: break-all;
  line-height: 1.6;
}

.usdt-network {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  color: var(--text3);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-top: 6px;
}

/* ── Login page ── */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}

.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  width: 100%;
  max-width: 380px;
  position: relative;
}

.login-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 17px;
  background: linear-gradient(135deg, rgba(0,229,255,0.15), transparent 50%, rgba(124,58,237,0.1));
  z-index: -1;
}

.login-logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 6px;
}

.login-tagline {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  color: var(--text3);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 32px;
}

/* ── Endpoint docs ── */
.endpoint {
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 16px;
}

.endpoint-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg3);
  cursor: pointer;
  transition: background 0.2s;
}

.endpoint-header:hover { background: rgba(0,229,255,0.04); }

.method-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 3px 7px;
  border-radius: 4px;
  background: rgba(0,229,255,0.15);
  color: var(--accent);
}

.endpoint-path {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.83rem;
  color: var(--text);
}

.endpoint-body {
  padding: 16px;
  border-top: 1px solid var(--border);
  display: none;
}

.endpoint.open .endpoint-body { display: block; }

.param-table { width: 100%; font-size: 0.78rem; border-collapse: collapse; margin-top: 8px; }
.param-table th { text-align: left; padding: 6px 10px; color: var(--text3); font-family: 'JetBrains Mono', monospace; font-size: 0.65rem; text-transform: uppercase; letter-spacing: 1px; }
.param-table td { padding: 6px 10px; color: var(--text2); }
.param-table td:first-child { font-family: 'JetBrains Mono', monospace; color: var(--accent); }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text3); }

/* ── Utilities ── */
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.text-accent { color: var(--accent); }
.text-green { color: var(--green); }
.text-red { color: var(--red); }
.text-muted { color: var(--text3); }
.text-sm { font-size: 0.8rem; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.w-full { width: 100%; }

@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .main { margin-left: 0; padding: 20px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}