/* 
## public/assets/style.css
```css
*/
/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    min-height: 100vh;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

/* Navigation */
.main-nav {
    background: #2c3e50;
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-brand h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

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

.nav-link {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

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

.nav-login {
    background: #3498db;
}

.nav-login:hover {
    background: #2980b9;
}

.nav-logout {
    background: #e74c3c;
}

.nav-logout:hover {
    background: #c0392b;
}

.nav-user {
    color: #ecf0f1;
    font-size: 0.9rem;
    padding: 0.5rem;
}

.user-info {
    color: #7f8c8d;
    font-size: 0.9rem;
    margin-right: 1rem;
}

/* Authentication Styles */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
    padding: 2rem;
}

.auth-card {
    background: white;
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
    border: 1px solid #e9ecef;
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h2 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
    font-size: 1.8rem;
}

.auth-header p {
    color: #7f8c8d;
    font-size: 0.9rem;
}

.auth-form {
    margin-bottom: 1.5rem;
}

.auth-form .form-group {
    margin-bottom: 1.5rem;
}

.auth-form .form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #2c3e50;
    font-size: 0.9rem;
}

.auth-form .form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e9ecef;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.auth-form .form-group input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.auth-footer {
    text-align: center;
    color: #7f8c8d;
    font-size: 0.8rem;
}

.btn-block {
    width: 100%;
    margin-bottom: 0.5rem;
}

/* Login prompt in sensor list */
.login-prompt {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: #7f8c8d;
}