.calculator-page {
    max-width: 760px;
    display: grid;
    gap: 0.85rem;
    align-content: start;
}

.calculator-hero {
    display: grid;
    gap: 0.8rem;
}

.tab-list,
.segmented {
    display: flex;
    gap: 0.22rem;
    padding: 0.22rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface-muted);
    overflow-x: auto;
}

.tab-button,
.segmented button {
    min-height: 38px;
    flex: 1 0 auto;
    padding: 0.4rem 0.7rem;
    border: 0;
    border-radius: 6px;
    background: transparent;
    color: var(--text-sub);
    font-size: 0.88rem;
    font-weight: 800;
    white-space: nowrap;
    cursor: pointer;
    transition: background-color 0.16s ease, color 0.16s ease, box-shadow 0.16s ease;
}

.tab-button.active,
.segmented button.active {
    background: var(--surface);
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.tab-panel {
    display: grid;
    gap: 0.85rem;
}

.tab-panel[hidden] {
    display: none;
}

.result-card,
.form-card,
.detail-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
}

.form-card {
    background: var(--surface);
}

.result-card {
    border-color: var(--border-strong);
    background: linear-gradient(180deg, var(--surface) 0%, var(--surface-muted) 100%);
}

.result-card {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.05rem 1.15rem;
    color: var(--text-main);
}

.result-card > span:first-child {
    min-width: 0;
    overflow-wrap: anywhere;
    font-size: clamp(1.55rem, 4vw, 2.1rem);
    font-weight: 900;
    line-height: 1.1;
    font-variant-numeric: tabular-nums;
}

.amount-subtext {
    flex: 0 0 auto;
    color: var(--text-sub);
    font-size: 0.88rem;
    font-weight: 750;
    white-space: nowrap;
}

.form-card {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.8rem 0.9rem;
    padding: 1.05rem;
}

.form-card .segmented {
    grid-column: 1 / -1;
}

.form-card label {
    min-width: 0;
    display: grid;
    gap: 0.35rem;
    color: var(--text-main);
    font-size: 0.84rem;
    font-weight: 800;
}

.form-card label:has(input[type="checkbox"]) {
    min-height: 42px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.48rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface-muted);
}

.form-card input,
.form-card select {
    width: 100%;
    min-height: 42px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text-main);
    padding: 0.48rem 0.65rem;
    font-size: 0.94rem;
    font-weight: 650;
    font-variant-numeric: tabular-nums;
}

.form-card input {
    text-align: right;
}

.form-card input[type="date"],
.form-card select {
    text-align: left;
}

.form-card input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    min-height: 1rem;
    margin: 0;
    padding: 0;
    flex: 0 0 auto;
    accent-color: var(--primary);
}

.field-hint {
    color: var(--text-sub);
    font-size: 0.76rem;
    font-weight: 650;
    line-height: 1.35;
}

.form-card input:focus,
.form-card select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: var(--focus-ring);
}

.btn-reset,
.btn-calculate {
    width: 100%;
    min-height: 44px;
    border-radius: var(--radius);
    padding: 0.5rem 0.8rem;
    font-size: 0.94rem;
    font-weight: 850;
    cursor: pointer;
    transition: transform 0.16s ease, background-color 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}

.btn-reset:hover,
.btn-calculate:hover {
    transform: translateY(-1px);
}

.btn-reset {
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-sub);
}

.btn-reset:hover {
    background: var(--surface-muted);
    border-color: var(--border);
    transform: none;
}

.btn-calculate {
    border: 1px solid var(--primary);
    background-color: var(--primary);
    color: #ffffff;
    box-shadow: 0 8px 18px rgba(36, 99, 235, 0.18);
}

.btn-calculate:hover {
    border-color: var(--primary-hover);
    background-color: var(--primary-hover);
}

.detail-card {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.25rem 1rem;
    padding: 0.95rem 1rem;
}

.calculation-detail summary {
    grid-column: 1 / -1;
    min-height: 34px;
    display: flex;
    align-items: center;
    color: var(--text-main);
    font-size: 0.9rem;
    font-weight: 850;
    cursor: pointer;
}

.calculation-detail[open] summary {
    margin-bottom: 0.25rem;
    padding-bottom: 0.45rem;
    border-bottom: 1px solid var(--border);
}

.detail-card p {
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    color: var(--text-sub);
    font-size: 0.9rem;
    line-height: 1.55;
}

.detail-card .detail-note {
    grid-column: 1 / -1;
    justify-content: flex-start;
    color: var(--text-sub);
    font-size: 0.82rem;
}

.detail-card span {
    color: var(--text-main);
    font-weight: 850;
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

.formula-card {
    padding: 0.85rem 0.95rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface-muted);
    color: var(--text-sub);
    font-size: 0.86rem;
    line-height: 1.6;
}

.formula-card strong {
    display: block;
    margin-bottom: 0.3rem;
    color: var(--text-main);
    font-weight: 850;
}

.net-pay {
    color: var(--primary) !important;
}

.calculator-mobile-sticky {
    display: none;
}

@media (min-width: 960px) {
    .calculator-page {
        max-width: 1040px;
        gap: 1rem;
    }

    .tab-panel {
        grid-template-columns: minmax(0, 1fr) minmax(280px, 320px);
        align-items: start;
        gap: 1rem;
    }

    .tab-panel .form-card {
        grid-column: 1;
        grid-row: 1;
    }

    .tab-panel .result-card {
        position: sticky;
        top: calc(var(--header-height) + 1rem);
        grid-column: 2;
        grid-row: 1;
        align-items: flex-start;
        flex-direction: column;
    }

    .tab-panel .detail-card,
    .tab-panel .formula-card {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    body {
        padding-bottom: calc(72px + env(safe-area-inset-bottom));
    }

    .calculator-page {
        max-width: 100%;
    }

    .result-card {
        align-items: flex-start;
        flex-direction: column;
    }

    .form-card,
    .detail-card {
        grid-template-columns: 1fr;
    }

    .tab-button,
    .segmented button,
    .btn-reset,
    .btn-calculate,
    .form-card input,
    .form-card select,
    .form-card label:has(input[type="checkbox"]) {
        min-height: 48px;
    }

    .tab-list {
        scrollbar-width: thin;
    }

    .calculator-mobile-sticky {
        position: fixed;
        right: 0;
        bottom: 0;
        left: 0;
        z-index: 90;
        display: block;
        padding: 0.65rem 1rem calc(0.65rem + env(safe-area-inset-bottom));
        border-top: 1px solid var(--border);
        background: rgba(255, 255, 255, 0.96);
        box-shadow: 0 -10px 28px rgba(16, 24, 40, 0.12);
        backdrop-filter: blur(12px);
    }

    .calculator-mobile-sticky .btn-calculate {
        min-height: 48px;
    }
}
.calculator-positioning {
    margin: 0 0 .35rem;
    color: var(--text-sub);
    font-size: .78rem;
    font-weight: 800;
}