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

:root {
  --dark-primary: #1a2332;
  --dark-secondary: #2a3441;
  --dark-tertiary: #374151;
  --cyan-primary: #2DD4BF;
  --cyan-secondary: #14B8A6;
  --cyan-dark: #0D9488;
  --cyan-glow: rgba(45, 212, 191, 0.3);
  --text-primary: #F9FAFB;
  --text-secondary: #D1D5DB;
  --text-muted: #9CA3AF;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, var(--dark-primary) 0%, #0f1419 100%);
  color: var(--text-primary);
  overflow-x: hidden;
}

/* Sidebar */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: 280px;
  height: 100vh;
  background: linear-gradient(180deg, var(--dark-secondary) 0%, var(--dark-primary) 100%);
  border-right: 1px solid rgba(45, 212, 191, 0.1);
  padding: 2rem 0;
  z-index: 1000;
  transition: transform 0.3s ease;
}

.sidebar::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 1px;
  height: 100%;
  background: linear-gradient(180deg, transparent 0%, var(--cyan-primary) 50%, transparent 100%);
  opacity: 0.3;
  animation: borderGlow 3s ease-in-out infinite;
}

@keyframes borderGlow {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.8; }
}

/* Logo */
.logo-section {
  padding: 0 2rem 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  margin-bottom: 1.25rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--cyan-primary), var(--cyan-secondary));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px var(--cyan-glow);
}

.logo-icon svg {
  width: 28px;
  height: 28px;
  fill: white;
}

.logo-title {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--cyan-primary), #fff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

/* Nav */
.nav-menu { padding: 0 1rem; }

.nav-item { margin-bottom: 0.35rem; }

.nav-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 12px;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.nav-link::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan-primary), transparent);
  transition: width 0.25s ease;
  opacity: 0.12;
}

.nav-link:hover::before { width: 100%; }

.nav-link:hover {
  background: rgba(45, 212, 191, 0.08);
  color: var(--text-primary);
  transform: translateX(5px);
}

.nav-link.active {
  background: linear-gradient(90deg, rgba(45, 212, 191, 0.18) 0%, rgba(45, 212, 191, 0.05) 100%);
  color: var(--cyan-primary);
  border-left: 3px solid var(--cyan-primary);
}

.nav-icon {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-icon svg { width: 100%; height: 100%; fill: currentColor; }

/* Main content */
.main-content {
  margin-left: 280px;
  min-height: 100vh;
  padding: 2rem;
}

/* Top bar */
.top-bar {
  background: rgba(42, 52, 65, 0.4);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  padding: 1.25rem 2rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.page-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.page-title::before {
  content: '';
  width: 4px;
  height: 22px;
  background: linear-gradient(180deg, var(--cyan-primary), var(--cyan-secondary));
  border-radius: 2px;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 12px;
}

.user-avatar {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--cyan-primary), var(--cyan-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: 0 2px 10px var(--cyan-glow);
}

/* Coming soon card */
.coming-soon {
  background: linear-gradient(135deg, rgba(42, 52, 65, 0.6) 0%, rgba(26, 35, 50, 0.6) 100%);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  padding: 3.5rem 2rem;
  text-align: center;
  margin-top: 1rem;
}

.coming-title {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.coming-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.active { transform: translateX(0); }
  .main-content { margin-left: 0; }
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--dark-primary); }
::-webkit-scrollbar-thumb { background: var(--dark-tertiary); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--cyan-primary); }