body {
    background: linear-gradient(135deg, #ff6ec4, #7873f5 70%);
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    min-height: 100vh;
    color: #32214b;
}
.container {
    max-width: 420px;
    margin: 2rem auto;
    background: #fff6fd;
    padding: 2.5rem 2rem 2rem 2rem;
    border-radius: 22px;
    box-shadow: 0 6px 24px rgba(160,50,210,0.14);
}
h1, h2, h3 {
    color: #b812b8;
    font-weight: bold;
    margin-bottom: 1rem;
}
input, button, select, textarea {
    font-size: 1rem;
    border-radius: 8px;
    border: none;
    margin-top: 7px;
    margin-bottom: 15px;
    padding: 10px 15px;
    width: 100%;
    box-sizing: border-box;
    background: #f6e8ff;
    transition: 0.18s;
}
input:focus, textarea:focus {
    outline: 2px solid #ff97ff;
}
button {
    background: linear-gradient(90deg, #ff7ace, #be82fe 80%);
    color: white;
    cursor: pointer;
    font-weight: bold;
    transition: 0.12s;
}
button:hover {
    filter: brightness(1.09);
}
.folder-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.folder {
    background: linear-gradient(120deg, #ffd6fa 60%, #e1e0ff 100%);
    border-radius: 12px;
    box-shadow: 0 2px 8px #ecb5f855;
    padding: 1rem 1.2rem;
    min-width: 140px;
    margin-bottom: 12px;
    font-weight: 500;
    color: #8700bb;
    text-decoration: none;
    display: block;
}
.card-list {
    margin-top: 1rem;
}
.card {
    background: #fff3fd;
    border-radius: 12px;
    box-shadow: 0 2px 6px #e1e1ff32;
    margin-bottom: 1.1rem;
    padding: 1.3rem 1rem;
    position: relative;
}
.card.learned {
    opacity: 0.57;
    filter: grayscale(50%);
    border: 1.7px solid #b25fd6;
}
label {
    font-size: 1.01rem;
    color: #9225ba;
}
a {
    color: #df1a95;
    text-decoration: underline;
    transition: color 0.13s;
}
a:hover {
    color: #c358d2;
}
@media (max-width: 600px) {
    .container {
        max-width: 97vw;
        padding: 1.1rem 0.5rem 1.5rem 0.5rem;
    }
}