/* ============================================================
   KeyShop — Dark UI with teal accent
   ============================================================ */
:root {
  --bg:        #0f1117;
  --surface:   #1a1d27;
  --surface2:  #222535;
  --border:    #2e3148;
  --accent:    #00d4aa;
  --accent2:   #0099ff;
  --danger:    #ff4d6d;
  --warning:   #f5a623;
  --text:      #e8eaf0;
  --text-muted:#7c84a3;
  --radius:    14px;
  --shadow:    0 4px 24px rgba(0,0,0,0.4);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 15px;
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { opacity: .8; }

/* ── Nav ── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 60px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-brand svg { width: 24px; height: 24px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 14px;
  transition: all .15s;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--surface2);
  color: var(--text);
}

.nav-user {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-muted);
}

/* ── Layout ── */
.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 32px 20px;
}

.page-header {
  margin-bottom: 28px;
}

.page-header h1 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 4px;
}

.page-header p {
  color: var(--text-muted);
  font-size: 14px;
}

/* ── Cards ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  right: 0; height: 3px;
  background: var(--accent);
  border-radius: var(--radius) var(--radius) 0 0;
}

.stat-card.blue::before  { background: var(--accent2); }
.stat-card.red::before   { background: var(--danger); }
.stat-card.gray::before  { background: #555; filter: grayscale(1); }

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.stat-value {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
}

.stat-icon {
  position: absolute;
  top: 20px; right: 20px;
  width: 40px; height: 40px;
  background: rgba(0,212,170,.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

/* ── Maintenance overlay ── */
.maintenance-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15,17,23,.85);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  backdrop-filter: blur(2px);
}

.maintenance-overlay span {
  font-size: 12px;
  color: var(--text-muted);
}

.maintenance-badge {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 20px;
}

/* ── Packages grid ── */
.pkg-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 14px;
  margin-bottom: 28px;
}

.pkg-card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  cursor: pointer;
  transition: all .2s;
  position: relative;
}

.pkg-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.pkg-card.selected {
  border-color: var(--accent);
  background: rgba(0,212,170,.07);
}

.pkg-card.best {
  border-color: var(--warning);
}

.pkg-best-tag {
  position: absolute;
  top: -10px; left: 50%;
  transform: translateX(-50%);
  background: var(--warning);
  color: #000;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 20px;
  white-space: nowrap;
}

.pkg-name {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.pkg-price {
  font-size: 22px;
  font-weight: 700;
  color: var(--accent);
}

.pkg-price span {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 400;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: 10px;
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}

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

.btn-primary:hover { opacity: .88; }

.btn-secondary {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
}

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

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-sm { padding: 6px 12px; font-size: 12px; border-radius: 8px; }
.btn-full { width: 100%; }

/* ── Forms ── */
.form-group { margin-bottom: 18px; }

.form-label {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 14px;
  color: var(--text);
  font-size: 14px;
  transition: border-color .15s;
  outline: none;
}

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

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

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

th {
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,.02); }

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.badge-success { background: rgba(0,212,170,.15); color: var(--accent); }
.badge-warning { background: rgba(245,166,35,.15); color: var(--warning); }
.badge-danger  { background: rgba(255,77,109,.15); color: var(--danger); }
.badge-muted   { background: var(--surface2); color: var(--text-muted); }

/* ── Key display ── */
.key-display {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  font-family: 'Courier New', monospace;
  font-size: 14px;
  color: var(--accent);
  letter-spacing: .08em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  word-break: break-all;
}

/* ── QR payment ── */
.qr-box {
  text-align: center;
  padding: 28px;
}

.qr-box img {
  width: 200px;
  height: 200px;
  border-radius: 12px;
  border: 4px solid var(--accent);
  margin-bottom: 16px;
}

.transfer-info {
  background: var(--surface2);
  border-radius: 12px;
  padding: 16px;
  margin-top: 16px;
  text-align: left;
}

.transfer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.transfer-row:last-child { border-bottom: none; }
.transfer-row .key  { color: var(--text-muted); }
.transfer-row .val  { font-weight: 600; color: var(--text); }
.transfer-row .val.accent { color: var(--accent); }

/* ── Alert ── */
.alert {
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 18px;
}

.alert-success { background: rgba(0,212,170,.1); border: 1px solid rgba(0,212,170,.3); color: var(--accent); }
.alert-danger  { background: rgba(255,77,109,.1); border: 1px solid rgba(255,77,109,.3); color: var(--danger); }
.alert-warning { background: rgba(245,166,35,.1); border: 1px solid rgba(245,166,35,.3); color: var(--warning); }

/* ── Auth page ── */
.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 36px;
  box-shadow: var(--shadow);
}

.auth-logo {
  text-align: center;
  margin-bottom: 28px;
}

.auth-logo h1 {
  font-size: 26px;
  font-weight: 800;
  color: var(--accent);
  margin-top: 8px;
}

.auth-logo p { color: var(--text-muted); font-size: 14px; }

.auth-tabs {
  display: flex;
  background: var(--surface2);
  border-radius: 10px;
  padding: 4px;
  margin-bottom: 24px;
  gap: 4px;
}

.auth-tab {
  flex: 1;
  text-align: center;
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  border: none;
  background: none;
  transition: all .15s;
}

.auth-tab.active {
  background: var(--accent);
  color: #000;
}

/* ── Copy btn ── */
.copy-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 12px;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}

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

/* ── Spinner ── */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .6s linear infinite;
  display: inline-block;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Tabs (shop) ── */
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.tab-btn {
  padding: 10px 18px;
  border: none;
  background: none;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all .15s;
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .container { padding: 20px 14px; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .pkg-grid  { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; }
  .auth-card { border-radius: 0; min-height: 100vh; }
}