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

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

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

.fuel-ipsum__header {
    border-bottom: 1px solid var(--fuel-ipsum-border);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
}

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

.fuel-ipsum__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-ipsum__field {
    display: grid;
    gap: 0.5rem;
    min-width: 0;
}

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

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

.fuel-ipsum__field input[type='number'],
.fuel-ipsum__field select,
.fuel-ipsum__actions button {
    border: 1px solid var(--fuel-ipsum-border-strong);
    border-radius: 0;
    color: var(--fuel-ipsum-text);
    font: inherit;
    transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.fuel-ipsum__field input[type='number'],
.fuel-ipsum__field select {
    background: var(--fuel-ipsum-surface-alt);
    box-sizing: border-box;
    display: block;
    max-width: 100%;
    min-width: 0;
    min-height: 3.125rem;
    padding: 0.8rem 0.95rem;
    width: 100%;
}

.fuel-ipsum__field input[type='number'] {
    appearance: none;
}

.fuel-ipsum__field select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' fill='none' stroke='%23f5f5f5' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5'%3E%3Cpath d='M2.25 4.5 6 8.25 9.75 4.5'/%3E%3C/svg%3E");
    background-position: right 0.75rem center;
    background-repeat: no-repeat;
    background-size: 0.9rem;
    padding-right: 2.25rem;
}

.fuel-ipsum[data-theme-mode='light'] .fuel-ipsum__field select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' fill='none' stroke='%23111' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5'%3E%3Cpath d='M2.25 4.5 6 8.25 9.75 4.5'/%3E%3C/svg%3E");
}

.fuel-ipsum__actions {
    align-items: center;
    align-self: end;
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.fuel-ipsum__actions button {
    background: var(--fuel-ipsum-surface-alt);
    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;
    white-space: nowrap;
}

.fuel-ipsum__actions button[data-role='generate'] {
    background: var(--fuel-ipsum-accent);
    border-color: var(--fuel-ipsum-accent);
    color: #ffffff;
}

.fuel-ipsum__actions button[data-role='copy'] {
    background: transparent;
}

.fuel-ipsum__option-group {
    border: 0;
    margin: 0;
    min-inline-size: 0;
    padding: 0;
}

.fuel-ipsum__option-group legend {
    color: var(--fuel-ipsum-text-muted);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    margin-bottom: 0.75rem;
    padding: 0;
    text-transform: uppercase;
}

.fuel-ipsum__option-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.fuel-ipsum__checkbox {
    align-items: center;
    background: var(--fuel-ipsum-surface-alt);
    border: 1px solid var(--fuel-ipsum-border);
    color: var(--fuel-ipsum-text);
    display: inline-flex;
    gap: 0.5rem;
    min-height: 2.875rem;
    padding: 0.625rem 0.875rem;
}

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

.fuel-ipsum[data-theme-mode='light'] .fuel-ipsum__checkbox input[type='checkbox'] {
    accent-color: #111111;
}

.fuel-ipsum__checkbox span {
    color: inherit;
}

.fuel-ipsum__field input[type='number']:focus,
.fuel-ipsum__field select:focus,
.fuel-ipsum__actions button:focus,
.fuel-ipsum__actions button:hover {
    border-color: var(--fuel-ipsum-focus);
    outline: none;
}

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

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

.fuel-ipsum__content {
    color: inherit;
    font: inherit;
}

.fuel-ipsum__content [data-role='preview'] {
    background: var(--fuel-ipsum-surface-alt);
    border: 1px solid var(--fuel-ipsum-border);
    display: block;
    min-height: 18rem;
    padding: 1.5rem;
}

.fuel-ipsum__content [data-role='preview'] > *:first-child {
    margin-top: 0;
}

.fuel-ipsum__content [data-role='preview'] > *:last-child {
    margin-bottom: 0;
}

.fuel-ipsum__content [data-role='preview'] > * + * {
    margin-top: 1.15rem;
}

.fuel-ipsum__content [data-role='preview'].is-plain-text {
    white-space: pre-line;
}

.fuel-ipsum__specimen {
    border-top: 1px solid var(--fuel-ipsum-border);
    margin-top: 1.5rem;
    padding-top: 1.25rem;
}

.fuel-ipsum__specimen-label {
    color: var(--fuel-ipsum-text-muted);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    margin: 0 0 0.75rem;
    text-transform: uppercase;
}

.fuel-ipsum__specimen-body {
    display: block;
}

.fuel-ipsum__specimen-body > * {
    margin-bottom: 0;
    margin-top: 0;
}

.fuel-ipsum__specimen-body > * + * {
    margin-top: 0.75rem;
}

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

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

    .fuel-ipsum__controls {
        grid-template-columns: 1fr;
    }
}

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

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

    .fuel-ipsum__actions button {
        width: 100%;
    }
}