.fuc-app,
.fuc-app * {
    box-sizing: border-box;
}

.fuc-app {
    --fuc-text: #f7fbff;
    --fuc-muted: #a9b7d2;
    --fuc-primary: #35efff;
    --fuc-secondary: #a75cff;
    --fuc-accent: #d4ff3d;
    --fuc-pink: #ff49cf;
    --fuc-danger: #ff647d;
    --fuc-border: rgba(53, 239, 255, .24);

    position: relative;
    isolation: isolate;
    overflow: hidden;
    width: 100%;
    max-width: 1160px;
    margin: 24px auto;
    padding: 24px;
    color: var(--fuc-text);
    background:
        radial-gradient(circle at 8% 8%, rgba(53,239,255,.17), transparent 31%),
        radial-gradient(circle at 92% 10%, rgba(167,92,255,.15), transparent 30%),
        radial-gradient(circle at 82% 92%, rgba(255,73,207,.11), transparent 34%),
        linear-gradient(145deg, #050713, #091020);
    border: 1px solid var(--fuc-border);
    border-radius: 28px;
    box-shadow: 0 25px 75px rgba(0,0,0,.46), inset 0 0 46px rgba(53,239,255,.025);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.fuc-app[data-theme="lime"] {
    --fuc-primary: #c8ff3f;
    --fuc-secondary: #31eaff;
    --fuc-accent: #ff47ca;
    --fuc-pink: #8a69ff;
    --fuc-border: rgba(200,255,63,.25);
}

.fuc-app[data-theme="pink"] {
    --fuc-primary: #ff46d1;
    --fuc-secondary: #916cff;
    --fuc-accent: #45ffb0;
    --fuc-pink: #30eaff;
    --fuc-border: rgba(255,70,209,.25);
}

.fuc-grid-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
    opacity: .30;
    background-image:
        linear-gradient(rgba(53,239,255,.055) 1px, transparent 1px),
        linear-gradient(90deg,rgba(53,239,255,.055) 1px, transparent 1px);
    background-size: 34px 34px;
    mask-image: linear-gradient(to bottom, black, transparent 94%);
}

.fuc-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 8px 6px 24px;
}

.fuc-brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.fuc-logo {
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    width: 66px;
    height: 66px;
    font-size: 34px;
    background: linear-gradient(145deg, rgba(53,239,255,.21), rgba(167,92,255,.16));
    border: 1px solid var(--fuc-border);
    border-radius: 20px;
    box-shadow: 0 0 26px rgba(53,239,255,.23), inset 0 0 20px rgba(255,255,255,.04);
}

.fuc-eyebrow {
    margin: 0 0 5px !important;
    color: var(--fuc-primary);
    font-size: 11px;
    font-weight: 900;
    letter-spacing: .14em;
}

.fuc-brand h2 {
    margin: 0 !important;
    color: var(--fuc-text);
    font-size: clamp(25px,4vw,38px);
    line-height: 1.05;
    letter-spacing: -.04em;
    text-shadow: 0 0 24px rgba(53,239,255,.2);
}

.fuc-brand p:last-child {
    margin: 7px 0 0 !important;
    color: var(--fuc-muted);
    font-size: 14px;
}

.fuc-toolbar {
    display: flex;
    gap: 9px;
}

.fuc-tool,
.fuc-category-button,
.fuc-swap,
.fuc-primary,
.fuc-secondary,
.fuc-quick-button {
    appearance: none;
    border: 0;
    font: inherit;
    cursor: pointer;
    transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease, background .16s ease;
}

.fuc-tool {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    min-height: 42px;
    padding: 9px 12px;
    color: var(--fuc-muted);
    background: rgba(255,255,255,.045);
    border: 1px solid rgba(255,255,255,.09);
    border-radius: 12px;
}

.fuc-tool:hover,
.fuc-tool.is-active {
    color: var(--fuc-text);
    border-color: var(--fuc-border);
    box-shadow: 0 0 18px rgba(53,239,255,.11);
}

.fuc-shell {
    display: grid;
    grid-template-columns: minmax(220px, 285px) minmax(0,1fr);
    gap: 18px;
}

.fuc-sidebar,
.fuc-main {
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 20px;
    background: linear-gradient(145deg, rgba(18,27,58,.89), rgba(7,12,28,.94));
    backdrop-filter: blur(14px);
}

.fuc-sidebar {
    padding: 18px;
}

.fuc-main {
    padding: clamp(19px,4vw,34px);
}

.fuc-label {
    display: block;
    margin-bottom: 8px;
    color: #e7f4ff;
    font-size: 12px;
    font-weight: 900;
    letter-spacing: .06em;
    text-transform: uppercase;
}

.fuc-search-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 12px;
    background: rgba(1,5,15,.73);
    border: 1px solid rgba(255,255,255,.09);
    border-radius: 14px;
}

.fuc-search-wrap:focus-within {
    border-color: var(--fuc-primary);
    box-shadow: 0 0 0 3px color-mix(in srgb,var(--fuc-primary) 13%,transparent);
}

.fuc-search-wrap input {
    width: 100%;
    height: 44px;
    padding: 0;
    color: var(--fuc-text);
    background: transparent;
    border: 0;
    outline: 0;
    font: inherit;
    font-size: 14px;
}

.fuc-search-wrap input::placeholder {
    color: #74819c;
}

.fuc-category-list {
    display: grid;
    gap: 8px;
    max-height: 585px;
    margin-top: 18px;
    overflow: auto;
    padding-right: 4px;
}

.fuc-category-button {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    width: 100%;
    padding: 11px 12px;
    color: #d0ddf1;
    text-align: left;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 12px;
}

.fuc-category-button:hover {
    color: var(--fuc-text);
    background: rgba(255,255,255,.045);
}

.fuc-category-button.is-active {
    color: #061018;
    font-weight: 900;
    background: linear-gradient(135deg,var(--fuc-primary),color-mix(in srgb,var(--fuc-primary) 58%,white));
    box-shadow: 0 0 22px color-mix(in srgb,var(--fuc-primary) 30%,transparent);
}

.fuc-category-button span:first-child {
    display: inline-flex;
    align-items: center;
    gap: 9px;
}

.fuc-category-button small {
    opacity: .72;
    font-size: 10px;
}

.fuc-titlebar {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    padding-bottom: 22px;
    border-bottom: 1px solid rgba(255,255,255,.08);
}

.fuc-chip {
    display: inline-flex;
    margin-bottom: 9px;
    padding: 5px 10px;
    color: var(--fuc-primary);
    background: color-mix(in srgb,var(--fuc-primary) 10%,transparent);
    border: 1px solid color-mix(in srgb,var(--fuc-primary) 28%,transparent);
    border-radius: 999px;
    font-size: 11px;
    font-weight: 900;
    letter-spacing: .07em;
    text-transform: uppercase;
}

.fuc-titlebar h3 {
    margin: 0 !important;
    color: var(--fuc-text);
    font-size: clamp(24px,3vw,34px);
    line-height: 1.1;
}

.fuc-titlebar p {
    margin: 8px 0 0 !important;
    color: var(--fuc-muted);
}

.fuc-formula {
    flex: 0 0 auto;
    max-width: 45%;
    padding: 13px 16px;
    color: var(--fuc-accent);
    background: rgba(1,5,15,.74);
    border: 1px solid color-mix(in srgb,var(--fuc-accent) 31%,transparent);
    border-radius: 13px;
    font: 900 15px "Courier New", monospace;
    text-align: center;
}

.fuc-converter {
    display: grid;
    grid-template-columns: minmax(0,1fr) 54px minmax(0,1fr);
    align-items: center;
    gap: 14px;
    padding-top: 24px;
}

.fuc-panel {
    padding: 18px;
    background: rgba(1,5,15,.60);
    border: 1px solid rgba(255,255,255,.09);
    border-radius: 17px;
}

.fuc-value-input,
.fuc-unit-select {
    width: 100%;
    color: var(--fuc-text);
    background: rgba(1,5,15,.78);
    border: 1px solid rgba(255,255,255,.11);
    border-radius: 13px;
    outline: 0;
    font: inherit;
}

.fuc-value-input {
    height: 62px;
    padding: 0 14px;
    font-size: 25px;
    font-weight: 900;
}

.fuc-output-input {
    color: var(--fuc-primary);
    text-shadow: 0 0 17px color-mix(in srgb,var(--fuc-primary) 24%,transparent);
}

.fuc-unit-select {
    height: 49px;
    margin-top: 10px;
    padding: 0 13px;
    color: var(--fuc-primary);
    font-size: 14px;
    font-weight: 900;
}

.fuc-unit-select option {
    color: #111827;
    background: #fff;
}

.fuc-value-input:focus,
.fuc-unit-select:focus {
    border-color: var(--fuc-primary);
    box-shadow: 0 0 0 3px color-mix(in srgb,var(--fuc-primary) 12%,transparent);
}

.fuc-swap {
    display: grid;
    place-items: center;
    width: 52px;
    height: 52px;
    color: #061018;
    background: linear-gradient(145deg,var(--fuc-secondary),var(--fuc-primary));
    border-radius: 50%;
    box-shadow: 0 0 23px color-mix(in srgb,var(--fuc-primary) 22%,transparent);
    font-size: 23px;
    font-weight: 900;
}

.fuc-swap:hover {
    transform: rotate(180deg) scale(1.04);
}

.fuc-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 11px;
    margin-top: 20px;
}

.fuc-primary,
.fuc-secondary {
    min-height: 48px;
    padding: 11px 19px;
    border-radius: 13px;
    font-weight: 900;
}

.fuc-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    color: #061018;
    background: linear-gradient(135deg,var(--fuc-primary),var(--fuc-accent));
    box-shadow: 0 0 25px color-mix(in srgb,var(--fuc-primary) 27%,transparent);
}

.fuc-secondary {
    color: var(--fuc-text);
    background: rgba(255,255,255,.055);
    border: 1px solid rgba(255,255,255,.10);
}

.fuc-primary:hover,
.fuc-secondary:hover,
.fuc-tool:hover,
.fuc-quick-button:hover {
    transform: translateY(-1px);
}

.fuc-primary:active,
.fuc-secondary:active,
.fuc-tool:active,
.fuc-quick-button:active {
    transform: translateY(1px) scale(.99);
}

.fuc-secondary:disabled {
    opacity: .45;
    cursor: not-allowed;
}

.fuc-result {
    margin-top: 22px;
    padding: 21px;
    background: linear-gradient(145deg,color-mix(in srgb,var(--fuc-primary) 8%,transparent),rgba(1,5,15,.67));
    border: 1px solid color-mix(in srgb,var(--fuc-primary) 23%,transparent);
    border-radius: 18px;
}

.fuc-result.is-error {
    border-color: rgba(255,100,125,.55);
}

.fuc-result-label {
    display: block;
    color: var(--fuc-muted);
    font-size: 10px;
    font-weight: 900;
    letter-spacing: .14em;
}

.fuc-result-value {
    margin-top: 6px;
    color: var(--fuc-primary);
    font-size: clamp(24px,4vw,40px);
    font-weight: 900;
    line-height: 1.13;
    overflow-wrap: anywhere;
    text-shadow: 0 0 22px color-mix(in srgb,var(--fuc-primary) 27%,transparent);
}

.fuc-result-detail {
    margin-top: 10px;
    color: var(--fuc-muted);
    font: 800 14px "Courier New", monospace;
    overflow-wrap: anywhere;
}

.fuc-quick {
    margin-top: 20px;
    padding: 18px;
    background: rgba(1,5,15,.48);
    border: 1px solid rgba(255,255,255,.07);
    border-radius: 16px;
}

.fuc-quick-head h4 {
    margin: 5px 0 0 !important;
    color: var(--fuc-text);
    font-size: 19px;
}

.fuc-quick-grid {
    display: grid;
    grid-template-columns: repeat(3,minmax(0,1fr));
    gap: 10px;
    margin-top: 14px;
}

.fuc-quick-button {
    min-height: 72px;
    padding: 11px;
    color: var(--fuc-text);
    text-align: left;
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.075);
    border-radius: 12px;
}

.fuc-quick-button strong {
    display: block;
    color: var(--fuc-primary);
    font-size: 16px;
}

.fuc-quick-button small {
    display: block;
    margin-top: 5px;
    color: var(--fuc-muted);
    font-size: 11px;
}

.fuc-quick-button:hover {
    border-color: var(--fuc-border);
    box-shadow: 0 0 17px color-mix(in srgb,var(--fuc-primary) 9%,transparent);
}

.fuc-note {
    margin: 14px 2px 0 !important;
    color: #7e8ca7;
    font-size: 12px;
    line-height: 1.5;
}

.fuc-error-text {
    color: var(--fuc-danger);
}

@media (max-width: 820px) {
    .fuc-app {
        padding: 14px;
        border-radius: 20px;
    }

    .fuc-header {
        align-items: flex-start;
    }

    .fuc-shell {
        grid-template-columns: 1fr;
    }

    .fuc-category-list {
        display: flex;
        max-height: none;
        overflow-x: auto;
        gap: 8px;
        padding: 2px 0 8px;
    }

    .fuc-category-button {
        flex: 0 0 auto;
        width: auto;
        white-space: nowrap;
        background: rgba(255,255,255,.035);
        border-color: rgba(255,255,255,.07);
    }

    .fuc-category-button small {
        display: none;
    }
}

@media (max-width: 650px) {
    .fuc-header {
        display: grid;
    }

    .fuc-toolbar {
        margin-left: 82px;
    }

    .fuc-tool-label {
        display: none;
    }

    .fuc-titlebar {
        display: grid;
    }

    .fuc-formula {
        max-width: 100%;
        width: 100%;
        text-align: left;
    }

    .fuc-converter {
        grid-template-columns: 1fr;
    }

    .fuc-swap {
        margin: -2px auto;
        transform: rotate(90deg);
    }

    .fuc-swap:hover {
        transform: rotate(270deg) scale(1.04);
    }

    .fuc-quick-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 430px) {
    .fuc-actions {
        display: grid;
        grid-template-columns: 1fr;
    }

    .fuc-quick-grid {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    .fuc-app *,
    .fuc-app *::before,
    .fuc-app *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
    }
}