:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --navbar-height: 60px;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.navbar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
    min-height: var(--navbar-height);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: white !important;
    letter-spacing: 1px;
}

.navbar-brand:hover {
    color: rgba(255,255,255,0.9) !important;
}

.nav-link {
    color: rgba(255,255,255,0.9) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    transition: all 0.3s ease;
    border-radius: 5px;
    margin: 0 0.25rem;
}

.nav-link:hover {
    color: white !important;
    background-color: rgba(255,255,255,0.1);
}

.nav-link.active {
    color: white !important;
    background-color: rgba(255,255,255,0.2);
}

.dropdown-menu {
    border: none;
    box-shadow: 0 4px 12px rgba(0,0,0,.15);
    border-radius: 8px;
}

.dropdown-item {
    padding: 0.5rem 1.5rem;
    transition: background-color 0.2s;
}

.dropdown-item:hover {
    background-color: rgba(102, 126, 234, 0.1);
}

.main-content {
    flex: 1;
    padding-top: 2rem;
    padding-bottom: 2rem;
}

.footer {
    background-color: #f8f9fa;
    padding: 1.5rem 0;
    margin-top: auto;
    border-top: 1px solid #dee2e6;
}

.alert {
    border-radius: 8px;
    margin-top: 1rem;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: rgba(255,255,255,0.2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    margin-right: 0.5rem;
}