/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 2rem;
}

/* Main Heading */
h1 {
    text-align: center;
    color: #fff;
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    letter-spacing: 2px;
}

/* Form Container */
form {
    max-width: 1200px;
    margin: 0 auto;
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* Table Styles */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
    background: #fff;
}

th {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

td {
    padding: 1rem;
    border-bottom: 1px solid #e0e0e0;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover {
    background-color: #f8f9fa;
}

/* Alternate row colors for better readability */
tbody tr:nth-child(even) {
    background-color: #fafafa;
}

tbody tr:nth-child(even):hover {
    background-color: #f0f0f0;
}

/* Input Styles */
input[type="number"] {
    width: 100%;
    padding: 0.5rem;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

input[type="number"]:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: #667eea;
}

/* Submit Button */
button[type="submit"] {
    width: 100%;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

button[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

button[type="submit"]:active {
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    h1 {
        font-size: 2rem;
        margin-bottom: 1.5rem;
    }

    form {
        padding: 1rem;
    }

    table {
        font-size: 0.875rem;
    }

    th, td {
        padding: 0.75rem 0.5rem;
    }

    button[type="submit"] {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.5rem;
    }

    th, td {
        padding: 0.5rem 0.25rem;
        font-size: 0.75rem;
    }

    input[type="number"] {
        padding: 0.375rem;
        font-size: 0.875rem;
    }

    input[type="checkbox"] {
        width: 16px;
        height: 16px;
    }
}