/* Reset & base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(to right, #74ebd5, #acb6e5);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
}

.container {
    text-align: center;
    background-color: rgba(0, 0, 0, 0.2);
    padding: 40px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn {
    padding: 15px 30px;
    font-size: 1rem;
    font-weight: bold;
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.3s ease;
}

.btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.3);
}

.btn-calculator {
    background-color: #4facfe;
}

.btn-notes {
    background-color: #00f2fe;
}