.pv-loss-calculator {
    display: grid;
    grid-template-columns: 1.1fr 0.85fr;
    gap: 1.2rem;
    align-items: start;
    max-width: 860px;
    margin: 0 auto;
}

.pv-loss-left,
.pv-loss-right {
    display: grid;
    gap: 1rem;
}

.card {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card--panel {
    padding: 1.25rem;
}

.card-header {
    margin-bottom: 1.5rem;
}

.card-header h3 {
    margin: 0 0 0.5rem;
    color: var(--color-primary);
}

.card-header p {
    margin: 0;
    color: var(--color-muted);
    line-height: 1.5;
}

.field-grid {
    display: grid;
    gap: 0.85rem;
}

.field {
    display: grid;
    gap: 0.4rem;
}

.field span {
    font-weight: 600;
    color: var(--color-primary);
    font-size: 0.95rem;
}

.field input,
.field select {
    width: 100%;
    padding: 0.75rem 0.85rem;
    border: 1px solid var(--color-border);
    border-radius: 0.85rem;
    background: white;
}

.slider-control {
    display: grid;
    gap: 1rem;
}

.slider-meta {
    display: grid;
    gap: 0.75rem;
}

.slider-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.slider-row span {
    font-weight: 600;
    color: var(--color-primary);
}

.slider-row strong {
    color: var(--color-secondary);
}

input[type="range"] {
    width: 100%;
    accent-color: var(--color-secondary);
}

.preview-card {
    overflow: hidden;
    border-radius: 1rem;
    background: var(--color-surface);
    box-shadow: var(--shadow);
}

.preview-card img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    display: block;
}

.preview-description {
    margin: 0.7rem 0.85rem 0.85rem;
    color: var(--color-muted);
    font-size: 0.92rem;
    line-height: 1.4;
}

.card--highlight {
    background: linear-gradient(180deg, rgba(15, 44, 74, 0.98), rgba(30, 72, 138, 0.97));
    color: white;
    padding: 2.25rem;
}

.pv-loss-summary {
    grid-column: 1 / -1;
}

.loss-meta-label {
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 0.85rem;
    opacity: 0.85;
    margin-bottom: 1rem;
}

.loss-kpi {
    font-size: clamp(2.2rem, 4vw, 3rem);
    font-weight: 800;
    margin: 0 0 1.2rem;
    color: #f9f3d4;
}

.loss-summary-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
}

.loss-summary-item {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 1rem;
    padding: 1rem;
}

.loss-summary-item span {
    display: block;
    font-size: 0.9rem;
    opacity: 0.8;
    margin-bottom: 0.5rem;
}

.loss-summary-item strong {
    display: block;
    font-size: 1.4rem;
    font-weight: 700;
}

.selection-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
}

.selection-option {
    appearance: none;
    border: 1px solid var(--color-border);
    background: white;
    color: var(--color-text);
    border-radius: 1rem;
    padding: 1rem 1rem;
    text-align: left;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.selection-option:hover {
    transform: translateY(-2px);
    border-color: var(--color-secondary);
}

.selection-option.active {
    background: linear-gradient(135deg, rgba(74, 124, 42, 0.15), rgba(74, 124, 42, 0.08));
    border-color: var(--color-secondary);
    box-shadow: 0 10px 25px rgba(74, 124, 42, 0.12);
}

.selection-option.active,
.selection-option:hover {
    color: var(--color-primary);
}

.loss-kpi,
.result-number {
    transition: color 0.25s ease;
}

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

    .selection-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 650px) {
    .selection-grid {
        grid-template-columns: 1fr;
    }
}