body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 100vh;
    background-color: rgba(255, 243, 222, 0.884);
    font-family: 'Roboto', sans-serif;
    padding: 20px;
}

header {
    width: 100%;
    max-width: 400px;
    margin-bottom: 20px;
    display: flex;
    justify-content: flex-start;
}

a {
    text-decoration: none;
    cursor: pointer;
    color: inherit;
}

.back-btn {
    background: #ff6600;
    color: #333;
    border: none;
    padding: 10px 20px;
    border-radius: 30px;
    font-weight: bold;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
    font-size: 1rem;
}

.back-btn:hover {
    background: #faa268;
}

.img-coloring {
    -webkit-user-drag: none;
    user-select: none;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 50%;
    height: 50%;
    border-radius: 14px;
}

.img-test {
    -webkit-user-drag: none;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 110px;
    height: auto;
}

.activity-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
    max-width: 400px;
}

.activity-card {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-around;
    padding: 20px 24px;
    text-align: center;
    font-size: 1.2rem;
    background-color: #ff922b;
    border: 3px solid #ff4d00;
    border-radius: 14px;
    backdrop-filter: blur(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Hover ve Active Efektleri */
.activity-card:hover {
    transform: translateY(-4px);
    background-color: #ff922b;
    box-shadow: 0 12px 24px #ffa179;
}