.join-main {
    padding: 2rem 1rem 3rem;
    background-color: #e6f2f8;
}

.join-section {
    width: min(100%, 720px);
    margin: 0 auto;
}

.join-intro {
    margin-bottom: 1.5rem;
    text-align: center;
}

.join-eyebrow {
    margin-bottom: 0.5rem;
    color: #fa6b2a;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-size: 0.9rem;
}

.join-intro h1 {
    margin-bottom: 0.75rem;
    color: #283593;
    font-size: clamp(2rem, 7vw, 2.75rem);
    line-height: 1.1;
}

.join-description,
.join-required-note {
    max-width: 620px;
    margin-left: auto;
    margin-right: auto;
}

.join-description {
    color: #333;
}

.join-required-note {
    margin-top: 0.75rem;
    color: #5a5a5a;
    font-size: 0.9rem;
}

.join-card {
    background-color: #fff;
    border-radius: 12px;
    padding: 1.25rem;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
}

#join-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-field label,
.preferences-fieldset legend {
    color: #222;
    font-weight: 700;
}

.optional-label {
    color: #666;
    font-size: 0.9rem;
    font-weight: 400;
}

.form-field input,
.form-field select {
    width: 100%;
    min-height: 48px;
    padding: 0.75rem;
    border: 1px solid #b8b8b8;
    border-radius: 8px;
    background-color: #fff;
    color: #222;
    font: inherit;
}

.form-field input:hover,
.form-field select:hover {
    border-color: #7c7c7c;
}

.form-field input:focus-visible,
.form-field select:focus-visible,
.preference-option:focus-within,
.join-submit:focus-visible {
    outline: 3px solid rgba(250, 107, 42, 0.35);
    outline-offset: 2px;
}

.form-field input:focus-visible,
.form-field select:focus-visible {
    border-color: #fa6b2a;
}

.field-hint {
    color: #5d5d5d;
    font-size: 0.9rem;
    line-height: 1.4;
}

.field-error {
    min-height: 1.25rem;
    color: #a12622;
    font-size: 0.9rem;
    font-weight: 600;
}

.form-field input[aria-invalid="true"],
.form-field select[aria-invalid="true"] {
    border-color: #a12622;
}

.preferences-fieldset {
    margin: 0;
    padding: 0;
    border: 0;
}

.preferences-fieldset legend {
    margin-bottom: 0.35rem;
    font-size: 1rem;
}

.preferences-list {
    display: grid;
    gap: 0.75rem;
    margin-top: 0.85rem;
}

.preference-option {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: start;
    gap: 0.75rem;
    min-width: 0;
    padding: 0.9rem;
    border: 1px solid #d2d2d2;
    border-radius: 10px;
    background-color: #fff;
    cursor: pointer;
}

.preference-option:hover {
    border-color: #283593;
    background-color: #f7f8ff;
}

.preference-option input {
    width: 1.2rem;
    height: 1.2rem;
    margin-top: 0.15rem;
    accent-color: #283593;
    cursor: pointer;
}

.preference-option span {
    min-width: 0;
}

.preference-option strong,
.preference-option small {
    display: block;
}

.preference-option strong {
    color: #222;
}

.preference-option small {
    margin-top: 0.2rem;
    color: #5d5d5d;
    font-size: 0.9rem;
    line-height: 1.4;
}

.form-feedback {
    display: none;
    padding: 0.9rem 1rem;
    border-radius: 8px;
    font-weight: 600;
    line-height: 1.45;
}

.form-feedback.is-visible {
    display: block;
}

.form-feedback.is-success {
    border: 1px solid #6b9f70;
    background-color: #edf7ee;
    color: #24552a;
}

.form-feedback.is-error {
    border: 1px solid #c9837f;
    background-color: #fff1f0;
    color: #7b211d;
}

.join-submit {
    width: 100%;
    min-height: 50px;
    border: 0;
    border-radius: 8px;
    padding: 0.8rem 1rem;
    background-color: #283593;
    color: #fff;
    font: inherit;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition:
        background-color 0.2s ease,
        transform 0.2s ease;
}

.join-submit:hover:not(:disabled) {
    background-color: #1f2a78;
}

.join-submit:active:not(:disabled) {
    transform: translateY(1px);
}

.join-submit:disabled {
    cursor: not-allowed;
    opacity: 0.7;
}

@media (min-width: 768px) {
    .join-main {
        padding: 3rem 1.5rem 4rem;
    }

    .join-card {
        padding: 2rem;
    }

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

@media (prefers-reduced-motion: reduce) {
    .join-submit {
        transition: none;
    }
}