.calculator-select-page,
.ducts-calculator-page,
.fasteners-calculator-page {
    padding: 1rem 0 3rem;
}

.selector-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
}

.selector-card,
.calc-card,
.calculator-card {
    border-radius: var(--radius);
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: var(--shadow);
}

.selector-card {
    padding: 1.6rem;
}

.card-icon-wrapper {
    width: 4rem;
    height: 4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 1.1rem;
    background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.16), rgba(var(--accent-rgb), 0.12));
    color: var(--primary-dark);
    font-size: 1.65rem;
}

.card-content h3 {
    margin-top: 1.1rem;
    color: var(--ink-950);
    font-size: 1.35rem;
}

.card-content p {
    margin-top: 0.65rem;
    color: var(--ink-600);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    margin-top: 1rem;
    color: var(--primary);
    font-weight: 700;
}

.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 1.5rem;
}

.calc-card,
.calculator-card {
    padding: 1.4rem;
    background: rgba(255, 255, 255, 0.92);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.card-header h3 {
    color: var(--ink-950);
    font-family: "IBM Plex Sans", sans-serif;
    font-size: 1.2rem;
}

.type-select,
.calc-select {
    width: 100%;
    min-height: 3rem;
    padding: 0.8rem 1rem;
    border-radius: 1rem;
    border: 1px solid var(--ink-200);
    background: var(--white);
    color: var(--ink-900);
}

.drawing-area {
    margin-bottom: 1rem;
    padding: 1rem;
    border-radius: 1.2rem;
    background: linear-gradient(180deg, #f3faf8, #edf2f7);
}

.drawing-img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

.input-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.8rem;
}

.input-field label,
.select-group label,
.input-group label,
.rounding-group .label {
    display: block;
    margin-bottom: 0.45rem;
    color: var(--ink-700);
    font-weight: 700;
    font-size: 0.9rem;
}

.input-field input,
.calc-input {
    width: 100%;
    min-height: 3rem;
    padding: 0.8rem 0.95rem;
    border-radius: 1rem;
    border: 1px solid var(--ink-200);
    background: var(--white);
}

.calc-btn {
    width: 100%;
    margin-top: 1rem;
    min-height: 3.2rem;
    border: none;
    border-radius: var(--radius-pill);
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--white);
    font-weight: 800;
    box-shadow: 0 12px 24px rgba(var(--primary-rgb), 0.24);
}

.result-block {
    margin-top: 1rem;
    padding: 1rem 1.1rem;
    border-radius: 1.2rem;
    background: var(--ink-100);
    color: var(--ink-700);
}

.result-block span,
.result-value {
    color: var(--ink-950);
    font-family: "IBM Plex Sans", sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
}

.select-group + .select-group,
.calc-section + .calc-section {
    margin-top: 1rem;
}

.rounding-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.9rem;
    margin-top: 1rem;
}

.radio-label {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
}

.export-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 1rem;
}

.btn-export {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    min-height: 3rem;
    padding: 0.8rem 1rem;
    border: none;
    border-radius: var(--radius-pill);
    color: var(--white);
    font-weight: 700;
}

.btn-excel {
    background: linear-gradient(135deg, #166534, #22c55e);
}

.btn-pdf {
    background: linear-gradient(135deg, #b91c1c, #ef4444);
}

@media (max-width: 900px) {
    .selector-grid {
        grid-template-columns: 1fr;
    }
}