nav {
    background-color: #333; /* Dark background for the menu bar */
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    padding: 10px 0;
    z-index: 10;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3); /* Add a subtle shadow for better visibility */
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center; /* Center the menu items */
    align-items: center;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    text-decoration: none;
    color: #ffffff;
    font-size: 18px;
    font-weight: 500;
    padding: 5px 10px; /* Add some padding for better clickability */
    transition: color 0.3s, background-color 0.3s; /* Smooth transitions for hover effect */
}

nav ul li a:hover {
    color: #007AFF; /* Highlight the link text */
    background-color: rgba(0, 122, 255, 0.1); /* Add a subtle background color on hover */
    border-radius: 5px; /* Rounded corners on hover */
}



body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: #f2f2f7;
    color: #000;
}

.content-wrapper {
    margin-top: 70px; /* Adjust this according to the height of your nav bar */
}

.container {
    max-width: 1200px;
    margin-top: 70px;
    margin: 0 auto;
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

@media (min-width: 1024px) {
    .container {
        height:auto;
        overflow: hidden;
        padding: 2vh;
    }
}

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

.header h1 {
    font-size: 34px;
    font-weight: 700;
    margin: 0;
    color: #000;
}

.current-gpa {
    display: flex;
    gap: 20px;
    margin-bottom: 2vh;
    flex-wrap: wrap;
}

input {
    background: #ffffff;
    border: 1px solid #e5e5ea;
    border-radius: 10px;
    padding: 12px 16px;
    font-size: 17px;
    color: #000;
    transition: all 0.2s;
}

input:focus {
    outline: none;
    border-color: #007aff;
    box-shadow: 0 0 0 3px rgba(0,122,255,0.2);
}

.grades-table {
    width: 100%;
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 2vh;
    font-size: 15px;
    border-spacing: 0;
    overflow: hidden;
}

.grades-table th, .grades-table td {
    padding: 12px;
    border-bottom: 1px solid #e5e5ea;
    text-align: center;
}

.grades-table th {
    background-color: #f8f8f8;
    font-weight: 600;
    color: #666;
}

.grades-table input {
    width: 90%;
    padding: 8px;
    border-radius: 8px;
}

button {
    background: #007aff;
    color: white;
    border: none;
    border-radius: 12px;
    padding: 14px 24px;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

button:hover {
    background: #0066d6;
}

button:active {
    transform: scale(0.98);
}

.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2vh;
    gap: 12px;
}

.summary {
    background: #fff;
    padding: 24px;
    border-radius: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.summary-row {
    display: flex;
    gap: 20px;
    margin-bottom: 16px;
}

.summary-item {
    flex: 1;
}

.summary-item label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #666;
    font-size: 15px;
}

.disabled-input {
    background-color: #f2f2f7;
    color: #666;
}

input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type=number] {
    -moz-appearance: textfield !important;
}

.footer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    margin-top: 20px;
    padding: 20px;
    text-align: center;
}

.footer a {
    text-decoration: none;
    background: none !important;
    padding: 0;
    border: none;
}

.footer a span {
    background: none !important;
    padding: 0;
    color: #007AFF;
    font-size: 14px;
    font-weight: 500;
}

.footer a:hover span {
    text-decoration: underline;
    color: #0056b3;
}

.footer span {
    color: #007AFF;
    font-size: 14px;
    font-weight: 500;
}




@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a1a1a;
        color: #fff;
    }

    .header h1 {
        color: #fff;
    }

    input, .grades-table, .summary {
        background: #1c1c1e;
        border-color: #38383a;
        color: #fff;
    }

    .grades-table th {
        background-color: #2c2c2e;
        color: #999;
    }

    .grades-table td {
        border-color: #38383a;
    }

    .disabled-input {
        background-color: #2c2c2e;
        color: #999;
    }

    .summary-item label {
        color: #999;
    }

    .footer a {
        background: rgba(0, 122, 255, 0.15);
    }

    .footer a:hover {
        background: rgba(0, 122, 255, 0.25);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 16px;
    }

    .current-gpa {
        flex-direction: column;
        gap: 12px;
    }

    .summary-row {
        flex-direction: column;
        gap: 12px;
    }

    .controls {
        flex-direction: column;
    }

    button {
        width: 100%;
    }
}