.btc-pool-calc {
    --btc-bg: #15171c;
    --btc-bg-raised: #1c1f26;
    --btc-bg-raised-2: #21242c;
    --btc-border: rgba(255, 255, 255, 0.08);
    --btc-border-strong: rgba(255, 255, 255, 0.18);
    --btc-text: #f5f5f5;
    --btc-text-muted: #9aa0ab;
    --btc-accent: #f7931a;
    --btc-accent-contrast: #17130a;
    --btc-positive: #4ade80;
    --btc-error-bg: rgba(239, 68, 68, 0.14);
    --btc-error-border: rgba(239, 68, 68, 0.35);
    --btc-error-text: #fca5a5;
    --btc-guaranteed-bg: rgba(247, 147, 26, 0.12);

    max-width: 640px;
    margin: 0 auto;
    padding: 20px;
    background: var(--btc-bg);
    border: 1px solid var(--btc-border);
    border-radius: 12px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    color: var(--btc-text);
    box-sizing: border-box;
}

.btc-pool-calc *,
.btc-pool-calc *::before,
.btc-pool-calc *::after {
    box-sizing: inherit;
}

.btc-pool-calc__price {
    display: flex;
    align-items: baseline;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.btc-pool-calc__price-label {
    font-size: 14px;
    color: var(--btc-text-muted);
}

.btc-pool-calc__price-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--btc-text);
}

.btc-pool-calc__price-updated {
    font-size: 12px;
    color: var(--btc-text-muted);
}

.btc-pool-calc__chart-periods,
.btc-pool-calc__scheme-toggle {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.btc-pool-calc__period,
.btc-pool-calc__scheme {
    padding: 6px 14px;
    border: 1px solid var(--btc-border-strong);
    background: var(--btc-bg-raised);
    border-radius: 999px;
    cursor: pointer;
    font-size: 13px;
    color: var(--btc-text);
    transition: background 0.15s ease, border-color 0.15s ease;
}

.btc-pool-calc__period:hover,
.btc-pool-calc__scheme:hover {
    border-color: var(--btc-accent);
}

.btc-pool-calc__period.is-active,
.btc-pool-calc__scheme.is-active {
    background: var(--btc-accent);
    border-color: var(--btc-accent);
    color: var(--btc-accent-contrast);
    font-weight: 600;
}

.btc-pool-calc__chart-wrap {
    position: relative;
    width: 100%;
    height: 260px;
    margin-bottom: 20px;
}

.btc-pool-calc__field {
    margin-bottom: 14px;
}

.btc-pool-calc__field label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--btc-text);
}

.btc-pool-calc__field input,
.btc-pool-calc__tp-input {
    width: 100%;
    padding: 8px 10px;
    background: var(--btc-bg-raised) !important;
    border: 1px solid var(--btc-border-strong);
    border-radius: 8px;
    font-size: 14px;
    color: var(--btc-text) !important;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.3);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

/* Quita las flechas de los <input type="number"> para un look más limpio. */
.btc-pool-calc__field input::-webkit-outer-spin-button,
.btc-pool-calc__field input::-webkit-inner-spin-button,
.btc-pool-calc__tp-input::-webkit-outer-spin-button,
.btc-pool-calc__tp-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.btc-pool-calc__field input,
.btc-pool-calc__tp-input {
    -moz-appearance: textfield;
}

.btc-pool-calc__field input:focus,
.btc-pool-calc__tp-input:focus {
    outline: none;
    border-color: var(--btc-accent);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.3), 0 0 0 3px rgba(247, 147, 26, 0.25);
}

.btc-pool-calc__results-wrap {
    border: 1px solid var(--btc-border);
    border-radius: 10px;
    overflow: hidden;
    background: var(--btc-bg-raised);
}

.btc-pool-calc__results {
    width: 100%;
    table-layout: fixed;
    border-collapse: collapse;
    font-size: 14px;
}

.btc-pool-calc__results thead th {
    padding: 9px 12px;
    background: var(--btc-bg-raised-2);
    border-bottom: 1px solid var(--btc-border-strong);
    color: var(--btc-text-muted);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.btc-pool-calc__results tbody td {
    padding: 10px 12px;
    vertical-align: middle;
    text-align: left;
}

.btc-pool-calc__results tbody td:first-child {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.btc-pool-calc__results tbody tr + tr td {
    border-top: 1px solid var(--btc-border);
}

.btc-pool-calc__results tbody tr:hover td {
    background: rgba(255, 255, 255, 0.03);
}

.btc-pool-calc__results td:nth-child(3),
.btc-pool-calc__results td:nth-child(4) {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.btc-pool-calc__results tbody td:last-child {
    color: var(--btc-positive);
    font-weight: 600;
}

.btc-pool-calc__row--guaranteed td {
    background: var(--btc-guaranteed-bg);
    font-weight: 600;
}

.btc-pool-calc__row--guaranteed:hover td {
    background: var(--btc-guaranteed-bg);
}

.btc-pool-calc__error {
    margin-top: 14px;
    padding: 10px 12px;
    border: 1px solid var(--btc-error-border);
    border-radius: 6px;
    background: var(--btc-error-bg);
    color: var(--btc-error-text);
    font-size: 14px;
}

.btc-pool-calc__error[hidden] {
    display: none;
}

@media (max-width: 480px) {
    .btc-pool-calc {
        padding: 14px;
    }

    .btc-pool-calc__price-value {
        font-size: 22px;
    }

    .btc-pool-calc__results {
        font-size: 12px;
    }

    .btc-pool-calc__results thead th,
    .btc-pool-calc__results tbody td {
        padding: 10px;
    }
}

@media (min-width: 768px) {
    .btc-pool-calc {
        max-width: 1200px;
    }

    .btc-pool-calc__columns {
        display: flex;
        align-items: flex-start;
        gap: 32px;
    }

    .btc-pool-calc__col {
        min-width: 0;
    }

    .btc-pool-calc__col--chart {
        flex: 1 1 460px;
    }

    .btc-pool-calc__col--calculator {
        flex: 1.2 1 480px;
    }

    .btc-pool-calc__col--chart .btc-pool-calc__chart-wrap {
        height: 388px;
        margin-bottom: 0;
    }
}