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

:root {
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-input: #0f172a;
  --border: rgba(255,255,255,0.08);
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --primary: #6366f1;
  --primary-hover: #818cf8;
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;
  --radius: 12px;
}

html, body {
  height: 100%;
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

/* Login */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px 32px;
  text-align: center;
}

.login-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 32px;
}

#login-form input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  margin-bottom: 12px;
  outline: none;
  transition: border-color 0.2s;
}

#login-form input:focus {
  border-color: var(--primary);
}

.form-error {
  color: var(--error);
  font-size: 0.85rem;
  margin-top: 12px;
}

/* Layout */
#app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 240px;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 10;
}

.sidebar-header {
  padding: 24px 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border);
}

.sidebar-header h2 {
  font-size: 1.1rem;
  font-weight: 700;
}

.badge {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  background: rgba(99,102,241,0.15);
  color: var(--primary-hover);
  border-radius: 6px;
}

.nav-list {
  list-style: none;
  padding: 12px 8px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.15s;
  margin-bottom: 2px;
}

.nav-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.nav-item:hover, .nav-item.active {
  color: var(--text);
  background: rgba(255,255,255,0.06);
}

.nav-item.active {
  background: rgba(99,102,241,0.12);
  color: var(--primary-hover);
}

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

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

/* Views */
.view { animation: fadeIn 0.2s ease; }
.hidden { display: none !important; }

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.view-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.view-header .view-title { margin-bottom: 0; }

.header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
}

/* Sections */
.section {
  margin-bottom: 32px;
}

.section-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

/* Tables */
.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

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

th {
  text-align: left;
  padding: 12px 16px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

td {
  padding: 12px 16px;
  font-size: 0.875rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

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

tr:hover td { background: rgba(255,255,255,0.02); }

/* Site cards */
.site-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
}

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

.site-card-title {
  font-size: 1.15rem;
  font-weight: 600;
}

.door-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
  gap: 8px;
}

.door-info { flex: 1; min-width: 200px; }

.door-name-text {
  font-weight: 600;
  font-size: 0.95rem;
}

.door-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.door-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

/* Registration mode badges */
.reg-badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.reg-closed { background: rgba(239,68,68,0.15); color: #f87171; }
.reg-open { background: rgba(16,185,129,0.15); color: #34d399; }
.reg-invite { background: rgba(245,158,11,0.15); color: #fbbf24; }

/* Status badges */
.status-badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 500;
}

.status-active { background: rgba(16,185,129,0.15); color: #34d399; }
.status-inactive { background: rgba(239,68,68,0.15); color: #f87171; }
.status-expired { background: rgba(148,163,184,0.15); color: #94a3b8; }
.status-used { background: rgba(99,102,241,0.15); color: #a5b4fc; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  gap: 6px;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover { background: var(--primary-hover); }

.btn-sm { padding: 7px 14px; font-size: 0.8rem; }
.btn-xs { padding: 4px 10px; font-size: 0.75rem; border-radius: 6px; }

.btn-success { background: rgba(16,185,129,0.15); color: #34d399; }
.btn-success:hover { background: rgba(16,185,129,0.25); }

.btn-danger { background: rgba(239,68,68,0.15); color: #f87171; }
.btn-danger:hover { background: rgba(239,68,68,0.25); }

.btn-warning { background: rgba(245,158,11,0.15); color: #fbbf24; }
.btn-warning:hover { background: rgba(245,158,11,0.25); }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  width: 100%;
}

.btn-ghost:hover {
  color: var(--text);
  background: rgba(255,255,255,0.04);
}

/* Select */
.select {
  padding: 8px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
}

.select:focus { border-color: var(--primary); }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 24px;
  backdrop-filter: blur(4px);
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 { font-size: 1.1rem; font-weight: 600; }

.btn-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
}

.btn-close:hover { color: var(--text); }

#modal-body {
  padding: 24px;
}

#modal-body label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

#modal-body input, #modal-body select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
  margin-bottom: 16px;
  outline: none;
}

#modal-body input:focus, #modal-body select:focus {
  border-color: var(--primary);
}

.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 8px;
}

/* Copy link box */
.copy-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  margin: 12px 0;
}

.copy-box code {
  flex: 1;
  font-size: 0.75rem;
  color: var(--text-muted);
  word-break: break-all;
}

.copy-box button { flex-shrink: 0; }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}

.empty-state p { font-size: 0.9rem; }

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    display: none; /* Could add hamburger menu later */
  }
  .content {
    margin-left: 0;
    padding: 20px;
  }
}