body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: #f4f7f9;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.container {
    background: #ffffff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    max-width: 500px;
    width: 100%;
    text-align: center;
}

h1 {
    color: #0056b3;
}

/* Admin Page */
#qrcode {
    padding: 1rem;
    background: white;
    border-radius: 8px;
    display: inline-block;
    margin-bottom: 1rem;
}
#qrcode img {
    border-radius: 4px;
}
.timer-container {
    font-size: 1.2rem;
    color: #d9534f;
}

/* Login & Scan Page */
.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}
label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}
input[type="text"] {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}
button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    width: 100%;
}
button:hover {
    background-color: #0056b3;
}

/* Scan Page Specific */
#qr-reader {
    border: 1px solid #ccc;
    border-radius: 8px;
    width: 100%;
    margin: 1rem auto;
}
.result {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 4px;
    font-weight: bold;
}
.result.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}
.result.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.sidebar .logout-section {
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 20px;
}
.sidebar .logout-btn {
    display: block;
    background-color: #c0392b;
    color: white !important;
    text-align: center;
    padding: 12px;
    border-radius: 5px;
    text-decoration: none;
    transition: background-color 0.3s;
}
.sidebar .logout-btn:hover {
    background-color: #e74c3c;
}