:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --accent-color: #2ecc71;
    --background-light: #f4f6f7;
    --white: #ffffff;
    --text-dark: #2c3e50;
    --transition-speed: 0.3s;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--background-light) 0%, #ffffff 100%);
    color: var(--text-dark);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 100%;
    max-width: 500px;
    background: var(--white);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 
        0 15px 35px rgba(0, 0, 0, 0.1), 
        0 5px 15px rgba(0, 0, 0, 0.06);
    text-align: center;
    transition: all var(--transition-speed) ease;
}

.container:hover {
    box-shadow: 
        0 20px 45px rgba(0, 0, 0, 0.15), 
        0 7px 20px rgba(0, 0, 0, 0.08);
}

h1 {
    color: var(--secondary-color);
    margin-bottom: 30px;
    font-weight: 600;
    position: relative;
    padding-bottom: 10px;
}

h1::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
}

.home-button-container {
    margin-bottom: 20px;
}

.home-button {
    display: inline-block;
    text-decoration: none;
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50px;
    transition: all var(--transition-speed) ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    font-weight: 500;
}

.home-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
    background-color: var(--secondary-color);
}

form {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

input[type="file"] {
    margin-bottom: 20px;
    width: 100%;
    padding: 15px;
    border: 2px dashed var(--primary-color);
    border-radius: 10px;
    text-align: center;
    transition: all var(--transition-speed) ease;
}

input[type="file"]:hover {
    border-color: var(--accent-color);
}

button {
    padding: 12px 25px;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    color: var(--white);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: all var(--transition-speed) ease;
    margin: 10px;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    background: linear-gradient(45deg, var(--accent-color), var(--primary-color));
}

#dataTable {
    margin-top: 20px;
    overflow-x: auto;
    max-height: 300px;
    overflow-y: auto;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    border-radius: 10px;
    overflow: hidden;
}

th, td {
    border: 1px solid #e0e0e0;
    padding: 12px;
    text-align: center;
    transition: background-color var(--transition-speed) ease;
}

th {
    background: linear-gradient(45deg, var(--secondary-color), var(--primary-color));
    color: var(--white);
    text-transform: uppercase;
    font-size: 13px;
    letter-spacing: 0.5px;
}

tr:nth-child(even) {
    background-color: #f9f9f9;
}

tr:hover {
    background-color: #f1f3f5;
}

/* Scrollbar Styling */
#dataTable::-webkit-scrollbar {
    width: 8px;
}

#dataTable::-webkit-scrollbar-track {
    background: #f1f1f1;
}

#dataTable::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

#dataTable::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* Responsive Design */
@media screen and (max-width: 600px) {
    .container {
        width: 95%;
        padding: 20px;
        margin: 20px 10px;
    }

    h1 {
        font-size: 1.5rem;
    }

    button {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}