* {
    box-sizing: border-box;
}

:root {
    --bg: #f1f5f8;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --line: #e5e7eb;
    --line-dark: #d1d5db;
    --primary: #000;
    --primary-soft: #dbeafe;
    --danger: #dc2626;
    --shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
    --radius: 5px;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

img {
    max-width: 100%;
    display: block;
}

button,
input,
textarea,
select {
    font: inherit;
}

.app-shell {
    min-height: 100vh;
    padding: 32px 16px 48px;
}

.survey-page {
    max-width: 860px;
    margin: 0 auto;
}

.survey-card {
    background: var(--card);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.survey-meta {
    display: inline-block;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    padding: 8px 12px;
    border-radius: 999px;
    margin-bottom: 14px;
}

.survey-title {
    font-size: 32px;
    line-height: 1.2;
    margin: 0px;
}

.survey-lead,
.survey-description,
.question-description {
    color: var(--muted);
    line-height: 1.7;
}

.survey-description {
    max-width: 720px;
}

.question-number {
    font-size: 13px;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 10px;
    display: none;
}

.question-title {
    margin: 0 0 25px;
    font-size: 18px;
    line-height: 1.3;
    border-bottom: 1px solid #f1f5f8;
    padding-bottom: 20px;
}

.choice-list {
    display: grid;
    gap: 12px;
    margin-top: 16px;
}

.choice-item {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid var(--line);
    border-radius: 5px;
    padding: 14px 16px;
    cursor: pointer;
    background: #fff;
    transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.choice-item:hover {
    border-color: var(--line-dark);
    background: #fafafa;
}

.choice-item input {
    transform: scale(1.1);
    flex-shrink: 0;
}

.choice-item input[type="radio"],
.choice-item input[type="checkbox"] {
    accent-color: var(--primary);
}

.choice-item input[type="radio"]:checked + span,
.choice-item input[type="checkbox"]:checked + span {
    font-weight: 700;
    color: var(--primary);
}

.choice-item:has(input:checked) {
    border-color: var(--primary);
    background: var(--primary-soft);
}

.form-control {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 5px;
    padding: 14px 16px;
    font-size: 15px;
    outline: none;
    background: #fff;
    color: var(--text);
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.form-control:focus {
    border-color: var(--primary);
    background: #fff;
}

textarea.form-control {
    resize: vertical;
}

.rating-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
    margin-top: 16px;
}

.rating-item {
    cursor: pointer;
}

.rating-item input {
    display: none;
}

.rating-item span {
    display: block;
    text-align: center;
    border: 1px solid var(--line);
    padding: 16px 10px;
    border-radius: 5px;
    background: #fff;
    font-weight: 700;
    transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.rating-item span:hover {
    border-color: var(--line-dark);
    background: #fafafa;
}

.rating-item input:checked + span {
    border-color: var(--primary);
    background: var(--primary-soft);
    color: var(--primary);
}

.icon-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 14px;
    margin-top: 18px;
}

.icon-item {
    cursor: pointer;
}

.icon-item input {
    display: none;
}

.icon-box {
    border: 1px solid var(--line);
    border-radius: 5px;
    padding: 18px 12px;
    background: #fff;
    text-align: center;
    min-height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 10px;
    transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.icon-box:hover {
    border-color: var(--line-dark);
    background: #fafafa;
}

.icon-item input:checked + .icon-box {
    border-color: var(--primary);
    background: var(--primary-soft);
}

.icon-emoji {
    font-size: 34px;
    line-height: 1;
}

.icon-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text);
}

.field-grid {
    display: grid;
    grid-template-columns: repeat(1, minmax(0, 1fr));
    gap: 18px;
    margin-top: 12px;
}

.field-item {
    min-width: 0;
}

.field-label {
    display: block;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 8px;
}

.required {
    color: var(--danger);
}

.form-error {
    margin: 8px 0 12px;
    font-size: 13px;
    color: var(--danger);
    font-weight: 700;
}

.submit-area {
    padding: 8px 0 0;
}

.submit-button {
    width: 100%;
    border: none;
    border-radius: 5px;
    background: var(--primary);
    color: #ffd702;
    padding: 18px 20px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: opacity 0.2s ease, background-color 0.2s ease;
}

.submit-button:hover {
    opacity: 0.95;
}

.submit-button:disabled,
.submit-button.is-loading {
    opacity: 0.75;
    cursor: not-allowed;
}

@media (max-width: 768px) {
    .app-shell {
        padding: 20px 12px 36px;
    }

    .survey-title {
        font-size: 26px;
    }

    .question-title {
        font-size: 20px;
    }

    .field-grid {
        grid-template-columns: 1fr;
    }

    .icon-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .rating-grid {
        grid-template-columns: repeat(5, minmax(0, 1fr));
        gap: 8px;
    }

    .survey-card {
        padding: 22px;
    }

    .icon-box {
        min-height: 110px;
    }
}