:root {
    --primary-color: #1a237e;
    --secondary-color: #303f9f;
    --accent-color: #3949ab;
    --light-bg: #f5f6fa;
    --header-height: 80px;
}

section {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light-bg);
    margin: 0;
    padding: 20px;
    color: #333;
}

.scontainer {
    max-width: 1000px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    padding: 10px;
}

.header {
    background: var(--primary-color);
    color: white;
    padding: 20px;
    text-align: center;
    border-bottom: 5px solid var(--accent-color);
    height: var(--header-height);
}

.header h1 {
    margin: 0;
    font-size: 24px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

main {
    margin-top: var(--header-height);
}

.form-container {
    padding: 30px;
    background: white;
}

.form-group {
    margin-bottom: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--primary-color);
    font-weight: 600;
}

select, input {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
}

select:focus, input:focus {
    border-color: var(--accent-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(63, 81, 181, 0.1);
}

button {
    background: var(--accent-color);
    color: white;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

button:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

#result {
    margin-top: 30px;
    padding: 20px;
    display: none;
}

.result-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--accent-color);
}

.student-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.info-item {
    padding: 10px;
    background: var(--light-bg);
    border-radius: 8px;
}

.info-label {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.marks-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.marks-table th, .marks-table td {
    padding: 15px;
    text-align: left;
    border: 1px solid #e0e0e0;
}

.marks-table th {
    background: var(--secondary-color);
    color: white;
    font-weight: 600;
    text-transform: uppercase;
}

.marks-table tr:nth-child(even) {
    background-color: var(--light-bg);
}

#downloadBtn {
    margin-top: 20px;
    background: var(--primary-color);
}

.watermark {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-45deg);
    font-size: 100px;
    opacity: 0.1;
    pointer-events: none;
    color: var(--primary-color);
    z-index: 1000;
}

/* Mobile Responsive Styles */
@media screen and (max-width: 768px) {
    .header h1 {
        font-size: 18px;
        letter-spacing: 0.5px;
    }

    .scontainer {
        padding: 5px;
        margin: 0 10px;
    }

    .form-container {
        padding: 15px;
    }

    .form-group label {
        font-size: 14px;
    }

    .form-group input,
    .form-group select {
        font-size: 14px;
        padding: 8px;
    }

    button {
        font-size: 14px;
        padding: 8px 16px;
    }
}

@media screen and (max-width: 480px) {
    .header h1 {
        font-size: 16px;
    }

    .form-group label {
        font-size: 13px;
    }

    .form-group input,
    .form-group select {
        font-size: 13px;
        padding: 6px;
    }
}