.clstc-calculator,
.clstc-calculator * {
    box-sizing: border-box;
}

.clstc-calculator {
    --clstc-brown: #210a03;
    --clstc-gold: #d8b756;
    --clstc-gold-soft: #f3ead0;
    --clstc-green: #5e7d55;
    --clstc-green-soft: #eef5ec;
    --clstc-cream: #faf8f3;
    --clstc-white: #ffffff;
    --clstc-border: #e5dece;
    --clstc-border-dark: #d6cbb8;
    --clstc-muted: rgba(33, 10, 3, 0.68);

    width: 100%;
    max-width: 760px;
    margin: 0 auto;
    color: var(--clstc-brown);
}

.clstc-calculator__inner {
    padding: clamp(24px, 4vw, 38px);
    background: linear-gradient(145deg, var(--clstc-cream), #f7f2e8);
    border: 1px solid var(--clstc-border);
    border-top: 5px solid rgba(216, 183, 86, 0.82);
    border-radius: 24px;
    box-shadow: 0 14px 34px rgba(33, 10, 3, 0.07);
}

.clstc-calculator__header {
    margin: 0 0 22px;
}

.clstc-calculator .clstc-calculator__title {
    margin: 0 0 8px;
    color: var(--clstc-brown);
    font-size: clamp(30px, 5vw, 42px);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.03em;
}

.clstc-calculator .clstc-calculator__lead,
.clstc-calculator .clstc-calculator__sublead {
    margin: 0;
    color: var(--clstc-brown);
    font-size: 16px;
    line-height: 1.48;
}

.clstc-calculator .clstc-calculator__sublead {
    color: var(--clstc-muted);
}

.clstc-calculator__input-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 15px;
    margin: 22px 0 20px;
}

.clstc-calculator__field {
    min-width: 0;
}

.clstc-calculator__label,
.clstc-calculator__summary-label {
    display: block;
    margin: 0 0 8px;
    color: var(--clstc-brown);
    font-size: 12px;
    font-weight: 750;
    letter-spacing: 0.07em;
    line-height: 1.2;
    text-transform: uppercase;
}

.clstc-calculator__control {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 86px;
    min-height: 54px;
    overflow: hidden;
    background: var(--clstc-white);
    border: 1px solid var(--clstc-border-dark);
    border-radius: 14px;
    box-shadow: 0 4px 14px rgba(33, 10, 3, 0.05);
    transition: border-color 160ms ease, box-shadow 160ms ease;
}

.clstc-calculator__control:hover {
    border-color: rgba(216, 183, 86, 0.85);
}

.clstc-calculator__control:focus-within {
    border-color: var(--clstc-gold);
    box-shadow: 0 0 0 4px rgba(216, 183, 86, 0.20), 0 4px 14px rgba(33, 10, 3, 0.05);
}

.clstc-calculator .clstc-calculator__control input,
.clstc-calculator .clstc-calculator__control select {
    width: 100%;
    min-width: 0;
    min-height: 54px;
    margin: 0;
    color: var(--clstc-brown);
    border: 0;
    border-radius: 0;
    box-shadow: none;
    font-size: 16px;
    line-height: 1.2;
    outline: none;
}

.clstc-calculator .clstc-calculator__control input {
    padding: 0 15px;
    background: var(--clstc-white);
}

.clstc-calculator .clstc-calculator__control select {
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    padding: 0 36px 0 13px;
    color: var(--clstc-brown);
    background-color: var(--clstc-gold-soft);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='13' height='9' viewBox='0 0 13 9'%3E%3Cpath fill='%23210a03' d='M6.5 9 0 0h13z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 13px center;
    background-size: 10px 7px;
    border-left: 1px solid var(--clstc-border-dark);
    font-weight: 750;
}

.clstc-calculator .clstc-calculator__control select:hover,
.clstc-calculator .clstc-calculator__control select:focus {
    background-color: #eee2c3;
}

.clstc-calculator__result-panel {
    margin: 0 0 15px;
    padding: 22px 24px;
    background: rgba(255,255,255,0.90);
    border: 1px solid var(--clstc-border);
    border-left: 5px solid var(--clstc-gold);
    border-radius: 18px;
    box-shadow: 0 8px 20px rgba(33, 10, 3, 0.05);
}

.clstc-calculator__result-label {
    margin: 0 0 7px;
    color: var(--clstc-muted);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.clstc-calculator__area {
    display: flex;
    align-items: flex-end;
    gap: 9px;
}

.clstc-calculator__area-value {
    color: var(--clstc-brown);
    font-size: clamp(52px, 10vw, 76px);
    font-weight: 880;
    letter-spacing: -0.055em;
    line-height: 0.96;
}

.clstc-calculator__area-unit {
    margin-bottom: 8px;
    color: #a77f14;
    font-size: 26px;
    font-weight: 800;
    line-height: 1;
}

.clstc-calculator__summary-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 15px;
    margin: 0 0 15px;
}

.clstc-calculator__summary-card {
    min-height: 132px;
    padding: 18px;
    background: rgba(255, 255, 255, 0.94);
    border: 1px solid var(--clstc-border);
    border-radius: 18px;
    box-shadow: 0 8px 20px rgba(33, 10, 3, 0.045);
}

.clstc-calculator__summary-card strong {
    display: block;
    margin: 0;
    color: var(--clstc-brown);
    font-size: clamp(30px, 5vw, 40px);
    font-weight: 850;
    letter-spacing: -0.04em;
    line-height: 1.05;
}

.clstc-calculator__summary-note {
    display: block;
    margin-top: 6px;
    color: var(--clstc-muted);
    font-size: 14px;
    font-weight: 650;
    line-height: 1.35;
}

.clstc-calculator__recommendation {
    margin: 0 0 12px;
    padding: 18px 20px;
    background: var(--clstc-green-soft);
    border: 1px solid rgba(94, 125, 85, 0.25);
    border-left: 5px solid var(--clstc-green);
    border-radius: 16px;
    box-shadow: 0 7px 20px rgba(21, 88, 7, 0.06);
    color: var(--clstc-brown);
}

.clstc-calculator__recommendation-label {
    display: block;
    margin: 0 0 6px;
    color: var(--clstc-green);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.11em;
    line-height: 1.2;
    text-transform: uppercase;
}

.clstc-calculator__recommendation strong {
    display: block;
    margin-top: 2px;
    color: var(--clstc-brown);
    font-size: clamp(24px, 4vw, 32px);
    font-weight: 850;
    letter-spacing: -0.035em;
    line-height: 1.12;
}

.clstc-calculator .clstc-calculator__recommendation p {
    margin: 8px 0 0;
    color: var(--clstc-muted);
    font-size: 14px;
    line-height: 1.45;
}

.clstc-calculator .clstc-calculator__tip {
    margin: 0;
    color: var(--clstc-muted);
    font-size: 14px;
    line-height: 1.45;
}

@media (max-width: 700px) {
    .clstc-calculator__input-grid,
    .clstc-calculator__summary-grid {
        grid-template-columns: 1fr;
    }

    .clstc-calculator__inner {
        border-radius: 20px;
    }

    .clstc-calculator__control {
        grid-template-columns: minmax(0, 1fr) 96px;
    }
}