.fb-wrapper {
    max-width: 720px;
    margin: 2rem auto;
    padding: 0 1rem;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: #1f2937;
    line-height: 1.6;
}

.fb-back {
    display: inline-block;
    margin-bottom: 1.25rem;
    padding: 0.4rem 0.85rem;
    font-size: 0.875rem;
    color: #4b5563;
    text-decoration: none;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.fb-back:hover {
    background-color: #f3f4f6;
    color: #111827;
    border-color: #9ca3af;
}

.fb-card {
    background-color: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 14px;
    padding: 2rem;
    box-shadow: 0 4px 16px rgba(17, 24, 39, 0.06);
}

.fb-title {
    margin: 0 0 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: #111827;
}

.fb-description {
    margin: 0 0 1.25rem;
    color: #6b7280;
    font-size: 0.95rem;
}

.fb-alert {
    padding: 0.85rem 1rem;
    border-radius: 10px;
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
    border: 1px solid transparent;
}

.fb-alert-success {
    background-color: #ecfdf5;
    border-color: #a7f3d0;
    color: #065f46;
}

.fb-alert-error {
    background-color: #fef2f2;
    border-color: #fecaca;
    color: #991b1b;
}

.fb-alert ul {
    margin: 0;
    padding-left: 1.1rem;
}

.fb-field {
    margin-bottom: 1.25rem;
}

.fb-label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: #374151;
}

.fb-required {
    color: #dc2626;
    margin-left: 0.15rem;
}

.fb-input,
.fb-textarea,
.fb-select {
    width: 100%;
    box-sizing: border-box;
    padding: 0.6rem 0.75rem;
    font-size: 0.95rem;
    font-family: inherit;
    color: #111827;
    background-color: #ffffff;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.fb-input:focus,
.fb-textarea:focus,
.fb-select:focus {
    outline: none;
    border-color: #6366f1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.18);
}

.fb-textarea {
    resize: vertical;
    min-height: 110px;
}

.fb-select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%236b7280'%3E%3Cpath fill-rule='evenodd' d='M5.23 7.21a.75.75 0 011.06.02L10 11.06l3.71-3.83a.75.75 0 111.08 1.04l-4.25 4.39a.75.75 0 01-1.08 0L5.21 8.27a.75.75 0 01.02-1.06z' clip-rule='evenodd'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.7rem center;
    background-size: 1rem;
    padding-right: 2.2rem;
}

.fb-checkbox-wrap {
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.fb-checkbox {
    width: 1.05rem;
    height: 1.05rem;
    accent-color: #6366f1;
    cursor: pointer;
}

.fb-checkbox-label {
    font-size: 0.9rem;
    color: #4b5563;
    cursor: pointer;
}

.fb-file {
    padding: 0.5rem;
    background-color: #f9fafb;
    cursor: pointer;
}

.fb-file::file-selector-button {
    margin-right: 0.75rem;
    padding: 0.45rem 0.85rem;
    font-size: 0.85rem;
    font-family: inherit;
    font-weight: 500;
    color: #374151;
    background-color: #e5e7eb;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.15s ease;
}

.fb-file::file-selector-button:hover {
    background-color: #d1d5db;
}

.fb-help {
    display: block;
    margin-top: 0.35rem;
    font-size: 0.8rem;
    color: #6b7280;
}

.fb-submit {
    display: block;
    width: 100%;
    margin-top: 1.75rem;
    padding: 0.8rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    font-weight: 600;
    color: #ffffff;
    background-color: #4f46e5;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.15s ease, transform 0.05s ease;
}

.fb-submit:hover {
    background-color: #4338ca;
}

.fb-submit:active {
    transform: translateY(1px);
}

.fb-submit:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.35);
}