.fuel-case-converter {
    --fuel-case-converter-surface: #ffffff;
    --fuel-case-converter-surface-alt: #f7f9fc;
    --fuel-case-converter-surface-muted: #eef3f8;
    --fuel-case-converter-border: rgba(35, 35, 35, 0.1);
    --fuel-case-converter-border-strong: rgba(35, 35, 35, 0.16);
    --fuel-case-converter-text: #232323;
    --fuel-case-converter-text-muted: #5b6574;
    --fuel-case-converter-focus: #2b6fbf;
    --fuel-case-converter-accent: #2b6fbf;
    --fuel-case-converter-shadow: 0 18px 40px rgba(15, 23, 42, 0.06);
    background: linear-gradient(180deg, var(--fuel-case-converter-surface-alt) 0%, var(--fuel-case-converter-surface) 100%);
    border: 1px solid var(--fuel-case-converter-border);
    box-shadow: var(--fuel-case-converter-shadow);
    box-sizing: border-box;
    color: var(--fuel-case-converter-text);
    color-scheme: light dark;
    font: inherit;
    margin: 10px auto 3rem !important;
    max-width: 920px;
    padding: 2rem;
    position: relative;
    width: 100%;
}

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

.fuel-case-converter__header {
    border-bottom: 1px solid var(--fuel-case-converter-border);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
}

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

.fuel-case-converter__controls {
    display: grid;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.fuel-case-converter__field {
    display: grid;
    gap: 0.5rem;
    min-width: 0;
}

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

.fuel-case-converter__field span,
.fuel-case-converter__eyebrow,
.fuel-case-converter__card-description {
    color: var(--fuel-case-converter-text-muted);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: none;
}

.fuel-case-converter__field textarea,
.fuel-case-converter__result,
.fuel-case-converter__actions button,
.fuel-case-converter__style-button,
.fuel-case-converter__copy-button {
    border: 1px solid var(--fuel-case-converter-border-strong);
    border-radius: 0;
    color: var(--fuel-case-converter-text);
    font: inherit;
    transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.fuel-case-converter__field textarea,
.fuel-case-converter__result {
    background: var(--fuel-case-converter-surface-alt);
    box-sizing: border-box;
    display: block;
    min-height: 11rem;
    padding: 1rem 1.1rem;
    resize: vertical;
    width: 100%;
}

.fuel-case-converter__style-list {
    display: grid;
    gap: 0.75rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.fuel-case-converter__style-button {
    align-content: start;
    background: var(--fuel-case-converter-surface-alt);
    cursor: pointer;
    display: grid;
    gap: 0.4rem;
    justify-items: start;
    min-height: 5.5rem;
    padding: 0.95rem 1rem;
    text-align: left;
}

.fuel-case-converter__style-button.is-active {
    background: var(--fuel-case-converter-surface);
    border-color: var(--fuel-case-converter-accent);
    color: var(--fuel-case-converter-text);
}

.fuel-case-converter__style-button.is-active .fuel-case-converter__style-button-label {
    color: var(--fuel-case-converter-accent);
}

.fuel-case-converter__style-button.is-active .fuel-case-converter__style-button-description {
    color: var(--fuel-case-converter-text-muted);
}

.fuel-case-converter__style-button-label {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.fuel-case-converter__style-button-description {
    color: var(--fuel-case-converter-text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: normal;
    text-transform: none;
}

.fuel-case-converter__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.fuel-case-converter__actions button,
.fuel-case-converter__copy-button {
    background: var(--fuel-case-converter-accent);
    border-color: var(--fuel-case-converter-accent);
    color: #ffffff;
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    min-height: 3.125rem;
    padding: 0.8rem 1.35rem;
    text-transform: none;
}

.fuel-case-converter__featured {
    background: var(--fuel-case-converter-surface-alt);
    border: 1px solid var(--fuel-case-converter-border);
    margin-bottom: 1.5rem;
    padding: 1.1rem;
}

.fuel-case-converter__featured-header {
    align-items: end;
    display: flex;
    gap: 1rem;
    justify-content: space-between;
    margin-bottom: 0.85rem;
}

.fuel-case-converter__eyebrow {
    margin: 0 0 0.45rem;
}

.fuel-case-converter__featured-title {
    color: var(--fuel-case-converter-text);
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
}

.fuel-case-converter__result {
    min-height: 10rem;
    overflow-wrap: anywhere;
    white-space: pre-wrap;
}

.fuel-case-converter__results {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.fuel-case-converter__card {
    background: var(--fuel-case-converter-surface-alt);
    border: 1px solid var(--fuel-case-converter-border);
    overflow: hidden;
}

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

.fuel-case-converter__card-title {
    color: var(--fuel-case-converter-text);
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0;
}

.fuel-case-converter__card-description {
    font-weight: 500;
    letter-spacing: normal;
    line-height: 1.4;
    margin: 0.4rem 0 0;
}

.fuel-case-converter__card-preview {
    color: inherit;
    font: inherit;
    line-height: 1.5;
    margin: 0;
    min-height: 8rem;
    overflow-wrap: anywhere;
    padding: 1.1rem;
    white-space: pre-wrap;
}

.fuel-case-converter__card-preview.is-empty {
    color: var(--fuel-case-converter-text-muted);
}

.fuel-case-converter__status {
    color: var(--fuel-case-converter-text-muted);
    margin: 0.9rem 0 0;
    min-height: 1.5em;
}

.fuel-case-converter__field textarea:focus,
.fuel-case-converter__result:focus,
.fuel-case-converter__actions button:focus,
.fuel-case-converter__actions button:hover,
.fuel-case-converter__style-button:focus,
.fuel-case-converter__style-button:hover,
.fuel-case-converter__copy-button:focus,
.fuel-case-converter__copy-button:hover {
    border-color: var(--fuel-case-converter-focus);
    outline: none;
}

.fuel-case-converter__actions button:hover,
.fuel-case-converter__actions button:focus,
.fuel-case-converter__style-button:hover,
.fuel-case-converter__style-button:focus,
.fuel-case-converter__copy-button:hover,
.fuel-case-converter__copy-button:focus {
    transform: translateY(-1px);
}

.fuel-case-converter[data-theme-mode='dark'] {
    --fuel-case-converter-surface: #171717;
    --fuel-case-converter-surface-alt: #202020;
    --fuel-case-converter-surface-muted: #1b1b1b;
    --fuel-case-converter-border: rgba(255, 255, 255, 0.14);
    --fuel-case-converter-border-strong: rgba(255, 255, 255, 0.22);
    --fuel-case-converter-text: #f5f5f5;
    --fuel-case-converter-text-muted: #b4becd;
    --fuel-case-converter-focus: #7db6ff;
    --fuel-case-converter-accent: #7db6ff;
    --fuel-case-converter-shadow: 0 22px 48px rgba(0, 0, 0, 0.35);
}

.fuel-case-converter[data-theme-mode='dark'] .fuel-case-converter__style-button.is-active,
.fuel-case-converter[data-theme-mode='dark'] .fuel-case-converter__actions button,
.fuel-case-converter[data-theme-mode='dark'] .fuel-case-converter__copy-button {
    color: #0f1720;
}

.fuel-case-converter[data-theme-mode='dark'] .fuel-case-converter__style-button.is-active {
    background: var(--fuel-case-converter-surface);
}

.fuel-case-converter[data-theme-mode='dark'] .fuel-case-converter__style-button.is-active .fuel-case-converter__style-button-label {
    color: var(--fuel-case-converter-accent);
}

.fuel-case-converter[data-theme-mode='dark'] .fuel-case-converter__style-button.is-active .fuel-case-converter__style-button-description {
    color: var(--fuel-case-converter-text-muted);
}

@media (max-width: 782px) {
    .fuel-case-converter {
        padding: 1.35rem;
    }

    .fuel-case-converter::before {
        left: 1.35rem;
        right: 1.35rem;
    }

    .fuel-case-converter__style-list,
    .fuel-case-converter__results {
        grid-template-columns: 1fr;
    }

    .fuel-case-converter__card-header,
    .fuel-case-converter__featured-header {
        align-items: stretch;
        flex-direction: column;
    }

    .fuel-case-converter__copy-button,
    .fuel-case-converter__actions button {
        width: 100%;
    }
}