:root {
    --hc-primary: #afbf30;
    --hc-primary-hover: #059669;
    --hc-bg: #ffffff;
    --hc-bg-alt: #f3f4f6;
    --hc-border: #e5e7eb;
    --hc-text: #1f2937;
    --hc-text-muted: #6b7280;
    --hc-radius: 12px;
    --hc-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --hc-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.handling-calc-wrapper {
    font-family: var(--hc-font);
    color: var(--hc-text);
    max-width: 600px;
    margin: 0 auto;
    box-sizing: border-box;
}

.handling-calc-wrapper * {
    box-sizing: border-box;
}

.hc-card {
    background: var(--hc-bg);
    border: 1px solid var(--hc-border);
    border-radius: var(--hc-radius);
    padding: 32px;
    box-shadow: var(--hc-shadow);
}

.hc-title {
    margin-top: 0;
    margin-bottom: 24px;
    font-size: 24px;
    font-weight: 600;
    color: var(--hc-text);
    text-align: center;
}

.hc-input-group {
    margin-bottom: 24px;
}

.hc-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--hc-text);
}

.hc-slider-val {
    color: #ffff;
    font-size: 16px;
    background: #344021;
    padding: 4px 10px;
    border-radius: 20px;
}

/* Number Input */
.hc-fee-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

.hc-input-narrow {
    width: 290px;
    max-width: 100%;
}

.hc-suffix-text {
    font-size: 16px;
    font-weight: 500;
    color: var(--hc-text);
}

.hc-input {
    padding: 12px 16px;
    border: 1px solid var(--hc-border);
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
    appearance: none;
    -moz-appearance: textfield;
}

.hc-input::-webkit-outer-spin-button,
.hc-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.hc-input:focus {
    outline: none;
    border-color: var(--hc-primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.hc-hint {
    font-size: 12px;
    color: var(--hc-text-muted);
    margin-top: 6px;
}

/* Slider */
.hc-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: var(--hc-bg-alt);
    outline: none;
    padding: 0;
    margin: 10px 0;
}

.hc-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--hc-primary);
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    transition: transform 0.1s, background 0.2s;
}

.hc-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    background: var(--hc-primary-hover);
}

.hc-slider::-webkit-slider-thumb:active {
    transform: scale(0.95);
}

.hc-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background:#344021;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    border: none;
}

.hc-slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--hc-text-muted);
}

/* Results */
.hc-results {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.hc-result-box {
    background: var(--hc-bg-alt);
    padding: 20px;
    border-radius: var(--hc-radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.hc-result-box.hc-highlight {
    background: var(--hc-primary);
    color: #fff;
}

.hc-result-label {
    font-size: 14px;
    font-weight: 600;
    opacity: 0.9;
}

.hc-result-value {
    font-size: 24px;
    font-weight: 700;
}

.hc-currency {
    font-size: 16px;
    font-weight: 500;
    opacity: 0.8;
}

@media (max-width: 480px) {
    .hc-card {
        padding: 24px 16px;
    }
    .hc-result-box {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .hc-fee-wrapper {
        flex-direction: column;
        align-items: flex-start;
    }
    .hc-input-narrow {
        width: 100%;
    }
}