.sol-nmk {
    --sol-accent: #b27a35;
    --sol-dark: #171717;
    --sol-muted: #6e6e6e;
    --sol-border: rgba(23,23,23,.10);
    --sol-bg: #f7f5f1;
    width: 100%;
    margin: 30px auto;
    box-sizing: border-box;
}

.sol-nmk * {
    box-sizing: border-box;
}

.sol-nmk-card {
    max-width: 900px;
    margin: 0 auto;
    padding: clamp(28px, 5vw, 58px);
    border: 1px solid var(--sol-border);
    border-radius: 24px;
    background: linear-gradient(145deg, #fff, var(--sol-bg));
    box-shadow: 0 18px 55px rgba(0,0,0,.08);
}

.sol-nmk-header {
    text-align: center;
}

.sol-nmk-eyebrow {
    margin-bottom: 10px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .18em;
    color: var(--sol-accent);
}

.sol-nmk-header h2 {
    margin: 0;
    color: var(--sol-dark);
    font-size: clamp(28px, 4vw, 44px);
    line-height: 1.08;
}

.sol-nmk-header p {
    max-width: 640px;
    margin: 14px auto 0;
    color: var(--sol-muted);
    font-size: 16px;
    line-height: 1.6;
}

.sol-nmk-type {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 32px 0 24px;
}

.sol-nmk-type-btn {
    min-height: 58px;
    border: 1px solid var(--sol-border);
    border-radius: 14px;
    background: #fff;
    color: var(--sol-dark);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: .2s ease;
}

.sol-nmk-type-btn:hover,
.sol-nmk-type-btn.is-active {
    border-color: var(--sol-accent);
    box-shadow: 0 8px 22px rgba(178,122,53,.14);
    transform: translateY(-1px);
}

.sol-nmk-type-btn.is-active {
    background: rgba(178,122,53,.06);
}

.sol-nmk-fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.sol-nmk-fields[hidden] {
    display: none;
}

.sol-nmk-fields label {
    display: block;
}

.sol-nmk-fields label > span {
    display: block;
    margin: 0 0 8px;
    color: var(--sol-dark);
    font-size: 13px;
    font-weight: 700;
}

.sol-nmk-input-wrap {
    position: relative;
}

.sol-nmk-input-wrap input {
    width: 100%;
    height: 58px;
    padding: 0 48px 0 18px;
    border: 1px solid var(--sol-border);
    border-radius: 14px;
    background: #fff;
    color: var(--sol-dark);
    font-size: 18px;
    outline: none;
    transition: .2s ease;
}

.sol-nmk-input-wrap input:focus {
    border-color: var(--sol-accent);
    box-shadow: 0 0 0 4px rgba(178,122,53,.10);
}

.sol-nmk-input-wrap b {
    position: absolute;
    top: 50%;
    right: 18px;
    transform: translateY(-50%);
    color: var(--sol-muted);
}

.sol-nmk-single {
    max-width: 50%;
    width: 100%;
    margin: 0 auto;
}

.sol-nmk-calculate,
.sol-nmk-buy {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 58px;
    margin-top: 22px;
    border: 0;
    border-radius: 14px;
    background: var(--sol-dark);
    color: #fff !important;
    font-size: 15px;
    font-weight: 700;
    text-decoration: none !important;
    cursor: pointer;
    transition: .2s ease;
}

.sol-nmk-calculate:hover,
.sol-nmk-buy:hover {
    background: var(--sol-accent);
    transform: translateY(-1px);
}

.sol-nmk-calculate span {
    margin-left: 10px;
    font-size: 20px;
}

.sol-nmk-message {
    min-height: 24px;
    margin-top: 16px;
    color: #a33;
    text-align: center;
    font-size: 14px;
}

.sol-nmk-result {
    margin-top: 28px;
    padding: 30px;
    border: 1px solid rgba(178,122,53,.22);
    border-radius: 20px;
    background: rgba(255,255,255,.82);
    text-align: center;
}

.sol-nmk-result-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    margin: 0 auto 14px;
    border-radius: 50%;
    background: rgba(178,122,53,.12);
    color: var(--sol-accent);
    font-size: 22px;
    font-weight: 700;
}

.sol-nmk-result-label {
    color: var(--sol-muted);
    font-size: 13px;
    font-weight: 600;
}

.sol-nmk-result-size {
    margin-top: 6px;
    color: var(--sol-dark);
    font-size: clamp(32px, 5vw, 50px);
    line-height: 1.1;
    font-weight: 800;
}

.sol-nmk-result-explain {
    max-width: 600px;
    margin: 12px auto 0;
    color: var(--sol-muted);
    font-size: 14px;
    line-height: 1.6;
}

.sol-nmk-buy {
    max-width: 460px;
    margin: 22px auto 0;
}

.sol-nmk-error {
    padding: 20px;
    border-radius: 12px;
    background: #fff1f1;
    color: #8b2222;
}

@media (max-width: 640px) {
    .sol-nmk-card {
        padding: 25px 18px;
        border-radius: 18px;
    }

    .sol-nmk-type,
    .sol-nmk-fields {
        grid-template-columns: 1fr;
    }

    .sol-nmk-single {
        max-width: 100%;
    }

    .sol-nmk-result {
        padding: 24px 16px;
    }
}