*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f4f6f8;
    color: #222;
}

.wrapper {
    max-width: 900px;
    margin: 40px auto;
    padding: 30px;
    background-color: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
}

h1 {
    color: #26394f;
    margin-top: 0;
}

p {
    line-height: 1.6;
}

.button-group {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn,
.back-link {
    display: inline-block;
    padding: 10px 16px;
    background-color: #34495e;
    color: #ffffff;
    text-decoration: none;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

.btn:hover,
.back-link:hover {
    background-color: #1f2f3d;
}

.back-link {
    margin-bottom: 20px;
}

.effects-area {
    display: grid;
    gap: 15px;
}

.effect-box {
    display: none;
    padding: 25px;
    background-color: #dfeaf5;
    border-left: 6px solid #34495e;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
}

.form-row {
    margin-bottom: 22px;
    padding: 15px;
    border: 2px solid #d9e1e8;
    border-radius: 8px;
}

label,
.group-label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
}

input,
select,
textarea {
    width: 100%;
    padding: 9px;
    border: 1px solid #aaa;
    border-radius: 5px;
    font-size: 1rem;
}

input[type="radio"],
input[type="checkbox"] {
    width: auto;
    margin-right: 6px;
}

textarea {
    min-height: 100px;
}

.form-row.error {
    background-color: #fff0f0;
    border-color: #c0392b;
}

.form-row.error label,
.form-row.error .group-label {
    color: #c0392b;
}

label.error {
    margin-top: 8px;
    color: #c0392b;
    font-size: 0.9rem;
    font-weight: normal;
}

footer {
    margin-top: 40px;
    padding-top: 15px;
    border-top: 1px solid #ddd;
    text-align: center;
    font-size: 0.9rem;
}

footer a {
    margin: 0 10px;
    color: #0077cc;
    cursor: pointer;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Tablet styles */
@media screen and (max-width: 768px) {
    .wrapper {
        margin: 25px 20px;
        padding: 24px;
    }

    h1 {
        font-size: 1.8rem;
    }

    .button-group {
        flex-direction: column;
    }

    .btn,
    .back-link {
        text-align: center;
    }
}

/* Phone styles */
@media screen and (max-width: 480px) {
    .wrapper {
        margin: 15px 10px;
        padding: 18px;
        border-radius: 8px;
    }

    h1 {
        font-size: 1.5rem;
    }

    .effect-box {
        padding: 18px;
    }

    .form-row {
        padding: 12px;
    }

    input,
    select,
    textarea {
        box-sizing: border-box;
    }

    footer a {
        display: block;
        margin: 8px 0;
    }
}