:root {
    --color-primary: #8b0000;
    --color-text: #4a4a4a;
    --color-muted: #666666;
    --color-bg: #f5f5f5;
    --color-card: #fffcdd;
    --color-white: #ffffff;
    --color-border: #dddddd;
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-header: 0 4px 12px rgba(0, 0, 0, 0.08);
    --radius-card: 20px;
    --radius-button: 4px;
    --container-width: 800px;
    --label-width: 120px;
}

* {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    min-height: 100vh;
    background-color: var(--color-bg);
    color: var(--color-text);
    font-size: 24px;
    padding: 100px 20px 32px;
}

input[type="radio"],
input[type="checkbox"] {
    accent-color: var(--color-primary);
    width: 24px;
    height: 24px;
    margin: 0 8px 0 0;
    flex: 0 0 auto;
}

textarea,
input,
button {
    font: inherit;
}

.site-header {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    display: flex;
    justify-content: center;
    background-color: var(--color-white);
    box-shadow: var(--shadow-header);
    z-index: 10;
}

.site-header__inner {
    width: min(100%, var(--container-width));
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 16px 20px;
}

.site-title {
    color: var(--color-primary);
    font-size: 2rem;
    font-weight: 700;
    white-space: nowrap;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 32px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.site-nav__link {
    color: #666666;
    text-decoration: none;
    transition: color 0.2s ease;
}

.site-nav__link:hover,
.site-nav__link--active {
    color: var(--color-primary);
}

.page-shell {
    width: 100%;
    display: flex;
    justify-content: center;
    margin-top: 5px;
}

.form-card {
    width: min(100%, var(--container-width));
    background-color: var(--color-card);
    box-shadow: var(--shadow-card);
    border-radius: var(--radius-card);
    padding: 32px;
}

.page-title {
    margin: 0 0 32px;
    color: var(--color-primary);
    font-size: 2.25rem;
    font-weight: 700;
    text-align: center;
}

.form-layout {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-row {
    display: flex;
    align-items: center;
}

.form-row--top {
    align-items: flex-start;
}

.form-label {
    width: var(--label-width);
    padding-right: 20px;
    color: var(--color-muted);
    text-align: right;
    flex: 0 0 auto;
}

.form-label--top {
    padding-top: 8px;
}

.form-control {
    flex: 1 1 auto;
    min-width: 0;
}

.form-control--inline,
.form-control--options {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}

.form-input {
    width: 100%;
    border: 1px solid var(--color-border);
    background-color: var(--color-white);
    padding: 12px 16px;
    border-radius: 4px;
    color: var(--color-text);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-textarea {
    min-height: 100px;
    resize: none;
}

.option-label {
    display: inline-flex;
    align-items: center;
    color: #4a4a4a;
}

.option-label--offset {
    margin-left: 16px;
}

.option-label--spaced {
    margin-right: 32px;
}

.option-text {
    color: #4a4a4a;
}

.form-actions {
    padding-top: 16px;
}

.submit-button {
    width: 100%;
    border: 0;
    border-radius: var(--radius-button);
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 12px 16px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.submit-button:hover {
    background-color: #6f0000;
}

.is-hidden {
    display: none;
}

@media (max-width: 900px) {
    body {
        font-size: 20px;
        padding-top: 92px;
    }

    input[type="radio"],
    input[type="checkbox"] {
        width: 20px;
        height: 20px;
    }

    .site-header__inner {
        padding: 14px 16px;
    }

    .site-title {
        font-size: 1.6rem;
    }

    .site-nav {
        gap: 20px;
    }

    .form-card {
        padding: 28px 24px;
    }

    .page-title {
        margin-bottom: 28px;
        font-size: 1.9rem;
    }

    .form-label {
        width: 104px;
        padding-right: 16px;
    }

    .option-label--spaced {
        margin-right: 24px;
    }
}

@media (max-width: 640px) {
    body {
        font-size: 16px;
        padding: 88px 12px 20px;
    }

    input[type="radio"],
    input[type="checkbox"] {
        width: 18px;
        height: 18px;
        margin-right: 6px;
    }

    .site-header__inner {
        align-items: flex-start;
        flex-direction: column;
        gap: 10px;
        padding: 12px;
    }

    .site-nav {
        width: 100%;
        gap: 18px;
        justify-content: flex-start;
    }

    .page-shell {
        margin-top: 0;
    }

    .form-card {
        border-radius: 16px;
        padding: 20px 16px;
    }

    .page-title {
        margin-bottom: 24px;
        font-size: 1.5rem;
    }

    .form-layout {
        gap: 18px;
    }

    .form-row,
    .form-row--top {
        align-items: stretch;
        flex-direction: column;
    }

    .form-label,
    .form-label--top {
        width: auto;
        padding: 0;
        margin-bottom: 8px;
        text-align: left;
    }

    .form-input {
        padding: 10px 12px;
        font-size: 1rem;
    }

    .form-textarea {
        min-height: 96px;
    }

    .form-control--inline,
    .form-control--options {
        gap: 12px 20px;
    }

    .option-label--offset,
    .option-label--spaced {
        margin: 0;
    }

    .submit-button {
        padding: 11px 14px;
    }
}