* {
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background: radial-gradient(circle at top left, #4361ee, #3f37c9);
    background-attachment: fixed;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    overflow: hidden;
}

.glass-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 40px;
    border-radius: 24px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    text-align: center;
    width: 380px;
    color: white;
    animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.icon { font-size: 3rem; margin-bottom: 10px; }

h1 { margin: 0; font-weight: 800; letter-spacing: -1px; }

p { opacity: 0.8; font-size: 0.9rem; margin-bottom: 30px; }

.display-container {
    background: rgba(0, 0, 0, 0.2);
    padding: 15px 20px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 25px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

#cpf-display {
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: 1px;
}

#btn-copy {
    background: transparent;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    transition: transform 0.2s;
    filter: grayscale(1) brightness(2);
}

#btn-copy:hover { transform: scale(1.2); }

.main-button {
    background: #4cc9f0;
    color: #03045e;
    border: none;
    width: 100%;
    padding: 15px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.main-button:hover {
    background: white;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.toast {
    position: fixed;
    bottom: 20px;
    background: #4cc9f0;
    color: #03045e;
    padding: 10px 20px;
    border-radius: 50px;
    font-weight: bold;
    font-size: 0.8rem;
    opacity: 0;
    transition: opacity 0.3s;
}