:root {
  --bg-main: #090d16;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-card-hover: rgba(31, 41, 55, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(99, 102, 241, 0.4);
  
  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-glow: rgba(99, 102, 241, 0.25);
  
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.15);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.15);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.15);
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --font-family: 'Outfit', 'Inter', -apple-system, sans-serif;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(at 10% 10%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 90% 90%, rgba(16, 185, 129, 0.08) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-main);
  font-family: var(--font-family);
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
}

/* App Container */
#app {
  display: flex;
  width: 100%;
  min-height: 100vh;
}

/* Sidebar Navigation */
.sidebar {
  width: 260px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  position: fixed;
  height: 100vh;
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 12px 28px 12px;
  border-bottom: 1px solid var(--border-color);
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent-primary), #818cf8);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #fff;
  box-shadow: 0 0 20px var(--accent-glow);
}

.brand-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(to right, #fff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 24px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 14px;
  transition: var(--transition);
  cursor: pointer;
}

.nav-item:hover, .nav-item.active {
  color: #fff;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.nav-item.active {
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.user-profile-section {
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-info {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.user-name {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}

.user-role {
  font-size: 11px;
  color: var(--accent-primary);
  font-weight: 600;
  text-transform: uppercase;
}

.btn-logout {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.btn-logout:hover {
  color: var(--danger);
  background: var(--danger-bg);
}

/* Main Content Area */
.main-wrapper {
  margin-left: 260px;
  flex: 1;
  padding: 32px 40px;
  min-height: 100vh;
}

/* Header Bar */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.page-title h1 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.page-title p {
  color: var(--text-muted);
  font-size: 14px;
  margin-top: 4px;
}

/* Buttons */
.btn {
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-family: var(--font-family);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-primary-hover));
  color: #fff;
  box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-success {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

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

.btn-danger {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

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

.btn-warning {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

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

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

/* Cards & Glass Containers */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
}

.glass-card:hover {
  border-color: rgba(255, 255, 255, 0.15);
}

/* VPS Grid */
.vps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.vps-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.vps-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-primary), var(--success));
}

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

.vps-name {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
}

.vps-id {
  font-size: 12px;
  color: var(--text-dim);
  font-family: monospace;
  margin-top: 2px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
}

.status-badge.running {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-badge.stopped {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(255, 255, 255, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 255, 255, 0); }
}

.vps-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 16px 0;
  padding: 12px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--radius-md);
}

.spec-item {
  display: flex;
  flex-direction: column;
}

.spec-label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  font-weight: 600;
}

.spec-value {
  font-size: 13px;
  color: var(--text-main);
  font-weight: 600;
  margin-top: 2px;
}

.vps-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

/* Plans Store Layout */
.plans-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.plan-card {
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.plan-title {
  font-size: 22px;
  font-weight: 700;
}

.plan-price {
  font-size: 32px;
  font-weight: 800;
  color: var(--accent-primary);
  margin: 16px 0;
}

.plan-price span {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 400;
}

.plan-features {
  list-style: none;
  margin: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: left;
}

.plan-features li {
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Auth Page */
.auth-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  width: 100%;
}

.auth-box {
  width: 100%;
  max-width: 420px;
  padding: 36px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-input, .form-select {
  width: 100%;
  padding: 12px 16px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: #fff;
  font-family: var(--font-family);
  font-size: 14px;
  transition: var(--transition);
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 12px var(--accent-glow);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal-box {
  width: 100%;
  max-width: 480px;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 2000;
}

.toast {
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  color: #fff;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  animation: slideIn 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@media (max-width: 768px) {
  .sidebar { width: 100%; height: auto; position: relative; }
  .main-wrapper { margin-left: 0; padding: 20px; }
  #app { flex-direction: column; }
}