/* Modern Glassmorphic & Modern Dark/Light Theme Design System */
:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: rgba(30, 41, 59, 0.7);
  --bg-card-hover: rgba(51, 65, 85, 0.8);
  --glass-border: rgba(255, 255, 255, 0.1);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #06b6d4;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-glow: 0 10px 30px -10px rgba(99, 102, 241, 0.3);
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

[data-theme="light"] {
  --bg-primary: #f1f5f9;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.8);
  --bg-card-hover: rgba(241, 245, 249, 0.9);
  --glass-border: rgba(0, 0, 0, 0.08);
  --text-main: #0f172a;
  --text-muted: #64748b;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* App Container Layout */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar Navigation */
.sidebar {
  width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--glass-border);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: fixed;
  height: 100vh;
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1rem;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  transition: all 0.2s ease;
  cursor: pointer;
}

.nav-link:hover, .nav-link.active {
  background: var(--accent-primary);
  color: #ffffff;
  box-shadow: var(--shadow-glow);
}

.nav-link i {
  font-size: 1.2rem;
}

/* Main Content Wrapper */
.main-wrapper {
  margin-left: 260px;
  flex: 1;
  padding: 2rem;
  padding-bottom: 5rem;
}

header.top-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.header-title h1 {
  font-size: 1.75rem;
  font-weight: 700;
}

.header-title p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

.btn {
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-md);
  border: none;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
}

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

.btn-primary:hover {
  background: var(--accent-primary-hover);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--glass-border);
}

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

.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  color: var(--text-main);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Bottom Navigation for Mobile */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--glass-border);
  padding: 0.5rem 1rem;
  z-index: 99;
}

@media (max-width: 900px) {
  .sidebar {
    display: none;
  }
  .main-wrapper {
    margin-left: 0;
    padding: 1rem;
  }
  .bottom-nav {
    display: flex;
    justify-content: space-around;
  }
  .bottom-nav .nav-link {
    flex-direction: column;
    gap: 0.2rem;
    font-size: 0.75rem;
    padding: 0.4rem;
  }
}