:root {
    --layer-1: #0E0C10;
    --layer-2: #211f25;
    --layer-3: #564F54;
    --brand-color: #DE4362;
    --text-1: #fff;
    --text-2: #aaa1a6;
    --derivative-mii-color: #1a1a1a;
    --layer-1-um: #121014;
    --layer-2-um: #252329;
    --layer-3-um: #5a5458;
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--layer-1);
    color: var(--text-1);
    margin: 0;
    font: 400 16px / 1.75 'Segoe UI', sans-serif;
    padding: 2rem;
}

.calculator-container {
    background-color: var(--layer-2-um);
    border: 2px solid #202020;
    border-radius: 25px;
    padding: 2rem;
    margin: 0 auto;
}

h2 {
    color: var(--brand-color);
    font-size: 2rem;
    font-weight: 600;
    margin: 0 0 2rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--layer-3-um);
}

.calc-grid {
    display: grid;
    gap: 2rem;
}

.input-group {
    background-color: var(--layer-1-um);
    border: 2px solid var(--layer-3-um);
    border-radius: 15px;
    padding: 1.5rem;
}

.input-group h3 {
    color: var(--text-1);
    font-size: 1.3rem;
    font-weight: 600;
    margin: 0 0 1.5rem 0;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.input-row {
    display: grid;
    grid-template-columns: 120px 1fr 80px;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.input-row:last-child {
    margin-bottom: 0;
}

.calc-range-wrap {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
    min-height: 20px;
}

.calc-range-ticks {
    position: absolute;
    left: 10px;
    right: 10px;
    top: 50%;
    height: 8px;
    transform: translateY(-50%);
    pointer-events: none;
    z-index: 3;
}

.calc-range-tick {
    position: absolute;
    top: 0;
    width: 2px;
    height: 8px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.34);
}

.calc-range-tick:nth-child(1) {
    left: 16.6667%;
    transform: translateX(-50%);
}

.calc-range-tick:nth-child(2) {
    left: 33.3333%;
    transform: translateX(-50%);
}

.calc-range-tick:nth-child(3) {
    left: 50%;
    transform: translateX(-50%);
}

.calc-range-tick:nth-child(4) {
    left: 66.6667%;
    transform: translateX(-50%);
}

.calc-range-tick:nth-child(5) {
    left: 83.3333%;
    transform: translateX(-50%);
}

.calc-range-tick-major {
    background: rgba(255, 255, 255, 0.56);
}

label {
    color: var(--text-1);
    font-size: 16px;
    font-weight: 500;
}

.calc-range,
input[type="range"] {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: linear-gradient(to right, var(--layer-3-um), var(--layer-3-um));
    outline: none;
    -webkit-appearance: none;
    position: relative;
    z-index: 2;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--brand-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 10px rgba(222, 67, 98, 0.5);
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--brand-color);
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 10px rgba(222, 67, 98, 0.5);
}

input[type="number"] {
    padding: 10px 12px;
    border: 2px solid var(--layer-3-um);
    border-radius: 8px;
    background-color: var(--layer-2-um);
    color: var(--text-1);
    font-family: inherit;
    font-size: 16px;
    text-align: center;
    transition: border-color 0.3s ease;
}

input[type="number"]:focus {
    outline: none;
    border-color: var(--brand-color);
}

/* Chrome, Safari, Edge, Opera */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    opacity: 1;
}

.dual-input {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.dual-input-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dual-input-item label {
    min-width: 80px;
}

.dual-input-item input {
    flex: 1;
}

@media (max-width: 768px) {
    .calculator-container {
        padding: 1.5rem;
        border-radius: 15px;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .input-group h3 {
        font-size: 1.1rem;
    }
    
    .input-row {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .dual-input {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    body {
        padding: 1rem;
    }
    
    .calculator-container {
        padding: 1rem;
    }
    
    h2 {
        font-size: 1.3rem;
    }
    
    .input-group {
        padding: 1rem;
    }
}