* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #fffbea;
    color: #111827;               
}

a {
    color: #111827;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

header {
    background-color: #facc15;      
    padding: 14px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

header h1 {
    margin: 0;
    font-size: 24px;
    color: #111827;
}

header img {
    height: 28px;
    width: auto;
    padding: 2px;
    border: 2px solid #111827;
    border-radius: 6px; 
    background-color: transparent;
    box-shadow: none;
}

nav a {
    margin-left: 20px;
    font-size: 15px;
    font-weight: 500;
    color: #111827;
}

.content {
    max-width: 900px;
    margin: 0 auto;
    padding: 25px 18px 40px;
}

h2 {
    text-align: center;
    margin-top: 10px;
    margin-bottom: 20px;
    color: #111827;
}

h3 {
    margin-top: 15px;
    color: #111827;
}
section {
    background-color: #ffffff;
    border-radius: 18px;
    padding: 20px 22px;
    margin: 20px 0;
    border: 1px solid #e5e7eb;
}

ul {
    margin-left: 20px;
}

#vision-mission h2 {
    margin-bottom: 10px;
}

.vm-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-top: 10px;
}

.vm-card {
    background-color: #fefce8;
    border-radius: 16px;
    padding: 16px 18px;
    border: 1px solid #e5e7eb;
}

.vm-card ul {
    margin-left: 18px;
}

pre {
    background-color: #111827;   
    border-radius: 12px;
    padding: 10px;
    border: 1px solid #0f172a;
    white-space: pre-wrap;
    word-break: break-word;
}

code {
    font-family: Consolas, monospace;
    font-size: 13px;
    color: #f9fafb;            
}

.lesson-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
    margin-top: 20px;
}

.lesson-card {
    background-color: #ffffff;
    border-radius: 18px;
    padding: 14px 16px;
    border: 1px solid #e5e7eb;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.lesson-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 18px rgba(15,23,42,0.15);
    border-color: #facc15;
}

.lesson-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}

.lesson-number {
    width: 30px;
    height: 30px;
    border-radius: 9999px;
    background-color: #111827;     
    color: #facc15;   
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

.lesson-title {
    margin: 0;
    font-size: 15px;
    color: #111827;
}

.lesson-summary {
    margin: 0;
    font-size: 13px;
    color: #4b5563;
}

.lesson-content {
    display: none;
    margin-top: 10px;
    font-size: 14px;
}

.lesson-card.open .lesson-content {
    display: block;
}

form {
    background-color: transparent;
    border-radius: 0;
    padding: 0;
    border: none;
    margin-top: 20px;
}

.quiz-card {
    background-color: #ffffff;
    border-radius: 18px;
    padding: 16px 18px;
    border: 1px solid #e5e7eb;
    margin-bottom: 16px;
}

.quiz-card h3 {
    margin-top: 0;
}

.quiz-actions {
    margin-top: 12px;
}

button {
    background-color: #111827;
    border: none;
    color: #f9fafb;
    padding: 8px 16px;
    border-radius: 9999px;
    font-size: 14px;
    cursor: pointer;
    font-weight: 600;
}

button:hover {
    background-color: #020617;
}

.result-box {
    margin-top: 10px;
    padding: 10px 15px;
    border-radius: 10px;
    border: 1px solid #e5e7eb;
    background-color: #fefce8;
    font-weight: 500;
    min-height: 20px;
}

footer {
    border-top: 1px solid #e5e7eb;
    text-align: center;
    padding: 15px 0;
    font-size: 13px;
    color: #6b7280;
    margin-top: 30px;
}