.zim-solar-calculator-ui {
    max-width: 640px;
    margin: 40px auto;
    padding: 32px;
    background: #fcfcfc;
    border-radius: 4px;
    box-shadow: 0 20px 60px rgba(0,0,0,.15);
    font-family: system-ui, sans-serif;
}

.zim-solar-calculator-ui h2 {
    margin-bottom: 6px;
}

.zim-solar-calculator-ui .subtitle {
    margin-bottom: 22px;
    color: #555;
}

.zim-solar-calculator-ui label {
    font-weight: 600;
}

.zim-solar-calculator-ui input {
    width: 100%;
    padding: 14px;
    margin: 10px 0 16px;
    border-radius: 4px;
    border: 1px solid #ccc;
}

.zim-solar-calculator-ui button {
    width: 100%;
    padding: 15px;
    background: #0b5589;
    color: #fcfcfc;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
}

.zim-solar-calculator-ui .results-panel {
    margin-top: 28px;
    padding: 24px;
    border-left: 6px solid #0b5589;
    border-radius: 4px;
    background: #fcfcfc;
}

.system-title {
    font-size: 22px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
}

.spec-grid {
    display: grid;
    grid-template-columns: repeat(2,1fr);
    gap: 14px;
}

.spec-card {
    background: #fcfcfc;
    padding: 14px;
    border-radius: 4px;
    text-align: center;
}

.spec-card span {
    display: block;
    font-size: 16px;
    color: #777;
}

.cost-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid #ddd;
}

.payback {
    margin-top: 18px;
    padding: 18px;
    background: #0b5589;
    color: #fcfcfc;
    text-align: center;
    border-radius: 4px;
}

.disclaimer {
    margin-top: 18px;
    padding: 14px;
    background: #fff4d6;
    border-radius: 4px;
    font-size: 16px;
    color: #8a5a00;
}