.fuel-bold-text {
    --fuel-bold-text-surface: #171717;
    --fuel-bold-text-surface-alt: #202020;
    --fuel-bold-text-border: rgba(255, 255, 255, 0.14);
    --fuel-bold-text-border-strong: rgba(255, 255, 255, 0.22);
    --fuel-bold-text-text: #f5f5f5;
    --fuel-bold-text-text-muted: rgba(245, 245, 245, 0.68);
    --fuel-bold-text-focus: #2b6fbf;
    --fuel-bold-text-accent: #2b6fbf;
    --fuel-bold-text-shadow: 0 18px 40px rgba(0, 0, 0, 0.22);
    background: linear-gradient(180deg, var(--fuel-bold-text-surface-alt) 0%, var(--fuel-bold-text-surface) 100%);
    border: 1px solid var(--fuel-bold-text-border);
    box-shadow: var(--fuel-bold-text-shadow);
    box-sizing: border-box;
    color: var(--fuel-bold-text-text);
    font: inherit;
    margin: 0 auto 3rem;
    max-width: 800px;
    padding: 2rem;
    position: relative;
    width: 100%;
}

.fuel-bold-text[data-theme-mode='light'] {
    --fuel-bold-text-surface: #ffffff;
    --fuel-bold-text-surface-alt: #f7f9fc;
    --fuel-bold-text-border: rgba(35, 35, 35, 0.1);
    --fuel-bold-text-border-strong: rgba(35, 35, 35, 0.16);
    --fuel-bold-text-text: #232323;
    --fuel-bold-text-text-muted: #5b6574;
    --fuel-bold-text-focus: #2b6fbf;
    --fuel-bold-text-shadow: 0 18px 40px rgba(15, 23, 42, 0.06);
}

.fuel-bold-text::before {
    background: linear-gradient(90deg, var(--fuel-bold-text-accent) 0%, transparent 100%);
    content: '';
    height: 3px;
    left: 2rem;
    position: absolute;
    right: 2rem;
    top: -1px;
}

.fuel-bold-text__header {
    border-bottom: 1px solid var(--fuel-bold-text-border);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
}

.fuel-bold-text__title {
    color: var(--fuel-bold-text-text);
    font-size: clamp(1.6rem, 2vw, 2rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin: 0;
}

.fuel-bold-text__controls {
    align-items: end;
    display: grid;
    column-gap: 1.25rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 1.25rem;
    margin-bottom: 1.75rem;
}

.fuel-bold-text__field {
    display: grid;
    gap: 0.5rem;
    min-width: 0;
}

.fuel-bold-text__field--full {
    grid-column: 1 / -1;
}

.fuel-bold-text__field span,
.fuel-bold-text__checkbox span {
    color: var(--fuel-bold-text-text-muted);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.fuel-bold-text__field textarea,
.fuel-bold-text__field input[type='range'],
.fuel-bold-text__actions button,
.fuel-bold-text__copy-button {
    border: 1px solid var(--fuel-bold-text-border-strong);
    border-radius: 0;
    color: var(--fuel-bold-text-text);
    font: inherit;
    transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.fuel-bold-text__field textarea {
    background: var(--fuel-bold-text-surface-alt);
    box-sizing: border-box;
    display: block;
    min-height: 10rem;
    padding: 1rem 1.1rem;
    resize: vertical;
    width: 100%;
}

.fuel-bold-text__field input[type='range'] {
    accent-color: #f5f5f5;
    background: transparent;
    min-height: 3.125rem;
    padding: 0;
    width: 100%;
}

.fuel-bold-text[data-theme-mode='light'] .fuel-bold-text__field input[type='range'],
.fuel-bold-text[data-theme-mode='light'] .fuel-bold-text__checkbox input[type='checkbox'] {
    accent-color: #111111;
}

.fuel-bold-text__size-readout {
    align-content: start;
    background: var(--fuel-bold-text-surface-alt);
    border: 1px solid var(--fuel-bold-text-border);
    min-height: 5.5rem;
    padding: 0.9rem 1rem;
}

.fuel-bold-text__size-readout strong {
    color: var(--fuel-bold-text-text);
    display: block;
    font-size: 1.7rem;
    font-weight: 600;
    line-height: 1.1;
    margin-top: 0.4rem;
}

.fuel-bold-text__checkbox {
    align-items: center;
    background: var(--fuel-bold-text-surface-alt);
    border: 1px solid var(--fuel-bold-text-border);
    color: var(--fuel-bold-text-text);
    display: inline-flex;
    gap: 0.5rem;
    min-height: 3.125rem;
    padding: 0.8rem 1rem;
}

.fuel-bold-text__checkbox input[type='checkbox'] {
    accent-color: #f5f5f5;
    margin: 0;
}

.fuel-bold-text__actions {
    align-items: center;
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.fuel-bold-text__actions button,
.fuel-bold-text__copy-button {
    background: var(--fuel-bold-text-accent);
    border-color: var(--fuel-bold-text-accent);
    color: #ffffff;
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    min-height: 3.125rem;
    padding: 0.8rem 1.35rem;
    text-transform: uppercase;
}

.fuel-bold-text__field textarea:focus,
.fuel-bold-text__field input[type='range']:focus,
.fuel-bold-text__actions button:focus,
.fuel-bold-text__actions button:hover,
.fuel-bold-text__copy-button:focus,
.fuel-bold-text__copy-button:hover {
    border-color: var(--fuel-bold-text-focus);
    outline: none;
}

.fuel-bold-text__actions button:hover,
.fuel-bold-text__actions button:focus,
.fuel-bold-text__copy-button:hover,
.fuel-bold-text__copy-button:focus {
    transform: translateY(-1px);
}

.fuel-bold-text__checkbox input[type='checkbox']:focus {
    outline: 1px solid var(--fuel-bold-text-focus);
    outline-offset: 2px;
}

.fuel-bold-text__results {
    display: grid;
    gap: 1.25rem;
    grid-template-columns: 1fr;
}

.fuel-bold-text__card {
    background: var(--fuel-bold-text-surface-alt);
    border: 1px solid var(--fuel-bold-text-border);
    border-radius: 0;
    overflow: hidden;
}

.fuel-bold-text__card-header {
    align-items: start;
    background: var(--fuel-bold-text-surface);
    display: flex;
    gap: 1rem;
    justify-content: space-between;
    padding: 1rem 1.1rem;
}

.fuel-bold-text__card-title {
    color: var(--fuel-bold-text-text);
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0;
}

.fuel-bold-text__card-meta {
    color: var(--fuel-bold-text-text-muted);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    margin: 0.35rem 0 0;
    text-transform: uppercase;
}

.fuel-bold-text__preview {
    color: inherit;
    font-family: inherit, 'Segoe UI Symbol', sans-serif;
    line-height: 1.35;
    min-height: 8rem;
    overflow-wrap: anywhere;
    padding: 1.35rem 1.1rem 1.5rem;
    white-space: pre-wrap;
}

.fuel-bold-text__preview.is-empty {
    color: var(--fuel-bold-text-text-muted);
    font-size: 1rem !important;
}

.fuel-bold-text__status {
    color: var(--fuel-bold-text-text-muted);
    margin: 0.75rem 0 0;
    min-height: 1.5em;
}

@media (max-width: 820px) {
    .fuel-bold-text {
        padding: 1.5rem;
    }

    .fuel-bold-text__controls,
    .fuel-bold-text__results {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .fuel-bold-text {
        padding: 1.25rem;
    }

    .fuel-bold-text::before {
        left: 1.25rem;
        right: 1.25rem;
    }

    .fuel-bold-text__card-header {
        align-items: stretch;
        flex-direction: column;
    }

    .fuel-bold-text__actions button,
    .fuel-bold-text__copy-button {
        width: 100%;
    }
}