/* Basic Page Styling */
body {
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
    padding: 0;
    background: #f4f6fa;
    color: #333;
}

/* Header */
header {
    background: #3b82f6;
    color: white;
    padding: 25px 15px;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 28px;
}

header p {
    margin-top: 5px;
    opacity: 0.9;
}

/* Main content layout */
main {
    padding: 20px;
    max-width: 600px;
    margin: auto;
}

/* Section boxes */
section {
    background: white;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.08);
}

/* Section Headings */
section h2 {
    margin-top: 0;
    font-size: 20px;
    color: #2563eb;
}

/* Inputs */
input {
    width: 100%;
    padding: 10px;
    margin: 8px 0;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 16px;
}

/* Buttons */
button {
    width: 100%;
    padding: 10px;
    background: #2563eb;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 8px;
}

button:hover {
    background: #1e40af;
}

/* Book list styling */
.book-list ul {
    list-style-type: none;
    padding: 0;
}

.book-list li {
    background: #f9fafb;
    padding: 12px;
    margin-bottom: 10px;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
}

/* Progress bar */
progress {
    width: 100%;
    height: 15px;
    margin-top: 10px;
}

/* Footer */
footer {
    text-align: center;
    padding: 15px;
    color: #555;
    margin-top: 20px;
}