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

.ftc-app {
    --ftc-text: #f7fbff;
    --ftc-muted: #a9b7d2;
    --ftc-primary: #38efff;
    --ftc-secondary: #a85cff;
    --ftc-accent: #ff4dcb;
    --ftc-hot: #ff6138;
    --ftc-warm: #ffda3d;
    --ftc-cold: #35eaff;
    --ftc-danger: #ff647d;
    --ftc-border: rgba(56,239,255,.24);

    position: relative;
    isolation: isolate;
    overflow: hidden;
    width: 100%;
    max-width: 1160px;
    margin: 24px auto;
    padding: 24px;
    color: var(--ftc-text);
    background:
        radial-gradient(circle at 9% 8%, rgba(56,239,255,.17), transparent 31%),
        radial-gradient(circle at 91% 8%, rgba(255,77,203,.14), transparent 31%),
        radial-gradient(circle at 80% 92%, rgba(255,97,56,.11), transparent 34%),
        linear-gradient(145deg, #050713, #091020);
    border: 1px solid var(--ftc-border);
    border-radius: 28px;
    box-shadow: 0 25px 75px rgba(0,0,0,.46), inset 0 0 46px rgba(56,239,255,.025);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.ftc-app[data-theme="fire"] {
    --ftc-primary: #ff7448;
    --ftc-secondary: #ff3ea5;
    --ftc-accent: #ffe33f;
    --ftc-border: rgba(255,116,72,.26);
}

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

.ftc-atmosphere {
    position: absolute;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.ftc-atmosphere span {
    position: absolute;
    width: 190px;
    height: 190px;
    border-radius: 50%;
    filter: blur(12px);
    opacity: .09;
    animation: ftcFloat 13s ease-in-out infinite alternate;
}

.ftc-atmosphere span:nth-child(1) {
    left: -70px;
    top: 25%;
    background: var(--ftc-cold);
}

.ftc-atmosphere span:nth-child(2) {
    right: -70px;
    top: 18%;
    background: var(--ftc-hot);
    animation-delay: 2s;
}

.ftc-atmosphere span:nth-child(3) {
    left: 28%;
    bottom: -100px;
    background: var(--ftc-secondary);
    animation-delay: 4s;
}

.ftc-atmosphere span:nth-child(4) {
    right: 26%;
    top: -100px;
    background: var(--ftc-primary);
    animation-delay: 6s;
}

@keyframes ftcFloat {
    from { transform: translateY(-15px) scale(.9); }
    to { transform: translateY(25px) scale(1.08); }
}

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

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

.ftc-logo {
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    width: 66px;
    height: 66px;
    font-size: 34px;
    background: linear-gradient(145deg, rgba(56,239,255,.21), rgba(255,77,203,.16));
    border: 1px solid var(--ftc-border);
    border-radius: 20px;
    box-shadow: 0 0 26px rgba(56,239,255,.23), inset 0 0 20px rgba(255,255,255,.04);
}

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

.ftc-brand h2 {
    margin: 0 !important;
    color: var(--ftc-text);
    font-size: clamp(25px,4vw,38px);
    line-height: 1.05;
    letter-spacing: -.04em;
    text-shadow: 0 0 24px rgba(56,239,255,.2);
}

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

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

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

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

.ftc-tool:hover,
.ftc-tool.is-active {
    color: var(--ftc-text);
    border-color: var(--ftc-border);
    box-shadow: 0 0 18px rgba(56,239,255,.11);
}

.ftc-shell {
    display: grid;
    grid-template-columns: minmax(220px,280px) minmax(0,1fr);
    gap: 18px;
}

.ftc-thermometer-card,
.ftc-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);
}

.ftc-thermometer-card {
    padding: 21px;
    text-align: center;
}

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

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

.ftc-thermometer {
    position: relative;
    display: flex;
    justify-content: center;
    min-height: 390px;
    margin-top: 19px;
}

.ftc-scale {
    position: absolute;
    left: 8px;
    top: 18px;
    bottom: 65px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    color: var(--ftc-muted);
    font-size: 11px;
    font-weight: 800;
}

.ftc-tube {
    position: relative;
    width: 42px;
    height: 315px;
    overflow: hidden;
    background: rgba(1,5,15,.78);
    border: 2px solid rgba(255,255,255,.15);
    border-radius: 25px 25px 10px 10px;
    box-shadow: inset 0 0 20px rgba(0,0,0,.55), 0 0 22px color-mix(in srgb,var(--ftc-primary) 11%,transparent);
}

.ftc-tube::after {
    content: "";
    position: absolute;
    inset: 8px 8px 45px;
    border-radius: 20px;
    background:
        repeating-linear-gradient(
            to bottom,
            rgba(255,255,255,.20) 0 1px,
            transparent 1px 28px
        );
    opacity: .45;
}

.ftc-mercury {
    position: absolute;
    left: 9px;
    right: 9px;
    bottom: 0;
    height: 50%;
    min-height: 10px;
    background: linear-gradient(to top, var(--ftc-cold), var(--ftc-primary), var(--ftc-warm), var(--ftc-hot));
    border-radius: 15px 15px 7px 7px;
    box-shadow: 0 0 20px color-mix(in srgb,var(--ftc-primary) 42%,transparent);
    transition: height .45s ease;
}

.ftc-bulb {
    position: absolute;
    left: 50%;
    bottom: 23px;
    width: 82px;
    height: 82px;
    transform: translateX(-50%);
    border-radius: 50%;
    background: radial-gradient(circle at 36% 30%, white 0 4%, var(--ftc-hot) 12%, var(--ftc-secondary) 62%, #741a78 100%);
    border: 3px solid rgba(255,255,255,.16);
    box-shadow: 0 0 32px color-mix(in srgb,var(--ftc-secondary) 35%,transparent);
}

.ftc-level-reading {
    margin-top: 9px;
    padding: 15px;
    background: rgba(1,5,15,.57);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 14px;
}

.ftc-level-reading strong {
    display: block;
    color: var(--ftc-primary);
    font-size: 26px;
}

.ftc-level-reading span {
    display: block;
    margin-top: 5px;
    color: var(--ftc-muted);
    font-size: 12px;
}

.ftc-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);
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

.ftc-primary:hover,
.ftc-secondary:hover,
.ftc-tool:hover,
.ftc-preset:hover {
    transform: translateY(-1px);
}

.ftc-primary:active,
.ftc-secondary:active,
.ftc-tool:active,
.ftc-preset:active {
    transform: translateY(1px) scale(.99);
}

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

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

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

.ftc-result-value {
    margin-top: 6px;
    color: var(--ftc-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(--ftc-primary) 27%,transparent);
}

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

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

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

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

.ftc-preset {
    min-height: 92px;
    padding: 12px;
    color: var(--ftc-text);
    text-align: left;
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.075);
    border-radius: 12px;
}

.ftc-preset span {
    font-size: 22px;
}

.ftc-preset strong {
    display: block;
    margin-top: 6px;
    color: var(--ftc-primary);
    font-size: 14px;
}

.ftc-preset small {
    display: block;
    margin-top: 4px;
    color: var(--ftc-muted);
    font-size: 11px;
}

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

.ftc-scale-grid {
    display: grid;
    grid-template-columns: repeat(5,minmax(0,1fr));
    gap: 9px;
    margin-top: 12px;
}

.ftc-scale-item {
    padding: 12px 9px;
    text-align: center;
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.07);
    border-radius: 11px;
}

.ftc-scale-item strong {
    display: block;
    color: var(--ftc-primary);
    font-size: 18px;
    overflow-wrap: anywhere;
}

.ftc-scale-item span {
    display: block;
    margin-top: 4px;
    color: var(--ftc-muted);
    font-size: 10px;
}

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

@media (max-width: 880px) {
    .ftc-shell {
        grid-template-columns: 1fr;
    }

    .ftc-thermometer-card {
        display: grid;
        grid-template-columns: auto 1fr;
        align-items: center;
        gap: 20px;
        text-align: left;
    }

    .ftc-card-label {
        grid-column: 1/-1;
    }

    .ftc-thermometer {
        min-height: 260px;
        width: 130px;
        margin: 0 auto;
    }

    .ftc-tube {
        height: 205px;
    }

    .ftc-bulb {
        bottom: 2px;
        width: 68px;
        height: 68px;
    }

    .ftc-scale {
        bottom: 48px;
    }
}

@media (max-width: 650px) {
    .ftc-app {
        padding: 14px;
        border-radius: 20px;
    }

    .ftc-header {
        display: grid;
        align-items: flex-start;
    }

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

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

    .ftc-titlebar {
        display: grid;
    }

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

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

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

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

    .ftc-preset-grid {
        grid-template-columns: 1fr 1fr;
    }

    .ftc-scale-grid {
        grid-template-columns: repeat(2,minmax(0,1fr));
    }
}

@media (max-width: 440px) {
    .ftc-thermometer-card {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .ftc-actions {
        display: grid;
        grid-template-columns: 1fr;
    }

    .ftc-preset-grid {
        grid-template-columns: 1fr;
    }
}

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