@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --bg-main: #07090e;
  --bg-surface: rgba(15, 23, 42, 0.75);
  --bg-surface-hover: rgba(30, 41, 59, 0.85);
  --bg-card: rgba(18, 26, 47, 0.6);
  --bg-card-hover: rgba(28, 38, 68, 0.75);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-active: rgba(139, 92, 246, 0.4);
  --border-glow: rgba(6, 182, 212, 0.5);

  --accent-primary: #8b5cf6;
  --accent-primary-gradient: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
  --accent-cyan: #06b6d4;
  --accent-cyan-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --accent-success: #10b981;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;

  --glass-blur: blur(16px);
  --shadow-main: 0 10px 30px -10px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 25px rgba(139, 92, 246, 0.25);
  --shadow-cyan-glow: 0 0 25px rgba(6, 182, 212, 0.25);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;

  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  background-color: var(--bg-main);
  background-image:
    radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.04) 0%, transparent 60%);
  background-attachment: fixed;
  color: var(--text-main);
  font-family: var(--font-main);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}
::-webkit-scrollbar-track {
  background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

/* ─────────────────────────── LAYOUT ─────────────────────────── */

.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background: var(--bg-surface);
  backdrop-filter: var(--glass-blur);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  transition: transform 0.3s ease;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 12px 24px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 24px;
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--accent-primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: var(--shadow-glow);
}

.brand-info h1 {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-info span {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-cyan);
  font-weight: 600;
}

.nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  transition: all 0.2s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

.nav-item:hover {
  color: var(--text-main);
  background: var(--bg-surface-hover);
  border-color: var(--border-subtle);
}

.nav-item.active {
  color: #fff;
  background: rgba(139, 92, 246, 0.15);
  border-color: var(--border-active);
  box-shadow: 0 0 15px rgba(139, 92, 246, 0.15);
}

.nav-item svg {
  width: 20px;
  height: 20px;
  stroke-width: 2;
  transition: transform 0.2s;
}

.nav-item:hover svg {
  transform: scale(1.1);
}

.sidebar-footer {
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.admin-badge {
  display: flex;
  align-items: center;
  gap: 10px;
}

.admin-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent-cyan-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
  color: #fff;
}

.admin-details {
  display: flex;
  flex-direction: column;
}

.admin-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
}

.admin-role {
  font-size: 11px;
  color: var(--accent-success);
}

/* Main Content Area */
.main-wrapper {
  margin-left: 260px;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.top-bar {
  height: 70px;
  background: rgba(7, 9, 14, 0.6);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  position: sticky;
  top: 0;
  z-index: 90;
}

.page-title h2 {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
  outline: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent-primary-gradient);
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 30px rgba(139, 92, 246, 0.4);
}

.btn-cyan {
  background: var(--accent-cyan-gradient);
  color: #fff;
  box-shadow: var(--shadow-cyan-glow);
}
.btn-cyan:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 30px rgba(6, 182, 212, 0.4);
}

.btn-glass {
  background: var(--bg-surface);
  color: var(--text-main);
  border-color: var(--border-subtle);
  backdrop-filter: var(--glass-blur);
}
.btn-glass:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-active);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: #fca5a5;
  border-color: rgba(239, 68, 68, 0.3);
}
.btn-danger:hover {
  background: rgba(239, 68, 68, 0.25);
  border-color: var(--accent-danger);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
  border-radius: var(--radius-sm);
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
}

.content-area {
  padding: 32px;
  flex: 1;
}

/* ─────────────────────────── DASHBOARD STATS ─────────────────────────── */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: flex;
  align-items: center;
  gap: 16px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.stat-card:hover {
  border-color: var(--border-active);
  transform: translateY(-2px);
  box-shadow: var(--shadow-main);
}

.stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-primary-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.stat-card:hover::after {
  opacity: 1;
}

.stat-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.stat-icon.purple {
  background: rgba(139, 92, 246, 0.15);
  color: var(--accent-primary);
}
.stat-icon.cyan {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
}
.stat-icon.green {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-success);
}
.stat-icon.amber {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-warning);
}

.stat-details h3 {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 4px;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.5px;
}

/* ─────────────────────────── CARDS & SECTIONS ─────────────────────────── */

.section-card {
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 24px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-main);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 16px;
}

.section-header h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}

.search-filter-box {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.input-search {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 9px 16px;
  color: #fff;
  font-size: 13px;
  outline: none;
  min-width: 260px;
  transition: border-color 0.2s;
}

.input-search:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 10px rgba(139, 92, 246, 0.2);
}

/* ─────────────────────────── NODES GRID ─────────────────────────── */

.nodes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.node-card {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all 0.3s ease;
  position: relative;
}

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

.node-card.online {
  border-left: 4px solid var(--accent-success);
}

.node-card.offline {
  border-left: 4px solid var(--accent-danger);
}

.node-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.node-title-box {
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.status-dot.online {
  background: var(--accent-success);
  box-shadow: 0 0 10px var(--accent-success);
}

.status-dot.offline {
  background: var(--accent-danger);
  box-shadow: 0 0 10px var(--accent-danger);
}

.node-name {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 600;
  color: #fff;
}

.node-badge {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  font-weight: 500;
}

.node-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding: 12px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--radius-md);
  font-size: 12px;
}

.detail-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.detail-label {
  color: var(--text-subtle);
  font-size: 11px;
}

.detail-val {
  color: var(--text-main);
  font-family: var(--font-mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.node-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  margin-top: auto;
}

/* ─────────────────────────── TABLES ─────────────────────────── */

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 13px;
}

.data-table th {
  background: rgba(15, 23, 42, 0.8);
  padding: 14px 18px;
  text-align: left;
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}

.data-table td {
  padding: 14px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  vertical-align: middle;
}

.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.user-name-cell {
  font-weight: 600;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.user-uuid {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-subtle);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: rgba(139, 92, 246, 0.12);
  color: #c4b5fd;
  border: 1px solid rgba(139, 92, 246, 0.25);
  white-space: nowrap;
}

.tag.merged {
  background: rgba(6, 182, 212, 0.12);
  color: #67e8f9;
  border-color: rgba(6, 182, 212, 0.25);
}

/* ─────────────────────────── MODALS ─────────────────────────── */

.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  padding: 20px;
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-box {
  background: #0f172a;
  border: 1px solid var(--border-active);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 540px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.75), var(--shadow-glow);
  transform: scale(0.95);
  transition: transform 0.25s ease;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 90vh;
}

.modal-backdrop.active .modal-box {
  transform: scale(1);
}

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

.modal-header h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  color: #fff;
}

.modal-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s;
}

.modal-close-btn:hover {
  color: #fff;
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  background: rgba(0, 0, 0, 0.2);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-control {
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 11px 14px;
  color: #fff;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.form-control:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 10px rgba(139, 92, 246, 0.2);
}

select.form-control {
  cursor: pointer;
}

.form-hint {
  font-size: 11px;
  color: var(--text-subtle);
}

/* ─────────────────────────── TOAST NOTIFICATIONS ─────────────────────────── */

.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 2000;
  pointer-events: none;
}

.toast {
  background: #0f172a;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  color: #fff;
  font-size: 13px;
  box-shadow: var(--shadow-main);
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 280px;
  max-width: 420px;
  pointer-events: auto;
  transform: translateX(100%);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

.toast.success {
  border-left: 4px solid var(--accent-success);
}
.toast.error {
  border-left: 4px solid var(--accent-danger);
}
.toast.info {
  border-left: 4px solid var(--accent-cyan);
}

/* ─────────────────────────── QR CODE & LINK BOX ─────────────────────────── */

.link-display-box {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.link-text {
  font-family: var(--font-mono);
  font-size: 11px;
  color: #cbd5e1;
  word-break: break-all;
  user-select: all;
  background: rgba(255, 255, 255, 0.03);
  padding: 8px;
  border-radius: var(--radius-sm);
}

.qr-canvas-wrapper {
  display: flex;
  justify-content: center;
  padding: 16px;
  background: #fff;
  border-radius: var(--radius-lg);
  margin: 0 auto;
  width: fit-content;
}

/* ─────────────────────────── LOGIN OVERLAY ─────────────────────────── */

.auth-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-main);
  background-image:
    radial-gradient(circle at 50% 30%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.1) 0%, transparent 40%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5000;
  padding: 20px;
}

.login-card {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-active);
  border-radius: var(--radius-xl);
  padding: 36px;
  width: 100%;
  max-width: 440px;
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.8), var(--shadow-glow);
  text-align: center;
}

.login-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  background: var(--accent-primary-gradient);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-glow);
}

.login-card h2 {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.login-card p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.login-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
  color: var(--text-subtle);
  font-size: 12px;
}

.login-divider::before,
.login-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-subtle);
}

/* Responsive */
@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-wrapper {
    margin-left: 0;
  }
}