body {
    background: linear-gradient(160deg, #eef2f7 0%, #f8fafc 100%);
    font-family: 'Segoe UI', system-ui, sans-serif;
}
.booking-wrapper { min-height: 100vh; }

.install-banner {
    background: #0d6efd;
    color: #fff;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
    font-size: 0.88rem;
    position: sticky;
    top: 0;
    z-index: 1050;
}

.step-indicator {
    border-bottom: 1px solid #e9ecef;
    padding-bottom: 14px;
}
.step-indicator .step {
    flex: 1;
    text-align: center;
    font-size: 0.85rem;
    color: #adb5bd;
    position: relative;
}
.step-indicator .step span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: #e9ecef;
    color: #868e96;
    margin-bottom: 4px;
    font-weight: 600;
}
.step-indicator .step.active {
    color: #0d6efd;
    font-weight: 600;
}
.step-indicator .step.active span {
    background: #0d6efd;
    color: #fff;
}
.step-indicator .step.done span {
    background: #198754;
    color: #fff;
}

.summary-box {
    background: #f8f9fa;
    border-radius: 10px;
    border: 1px solid #e9ecef;
}

.slot-btn {
    border: 1px solid #dee2e6;
    background: #fff;
    border-radius: 8px;
    padding: 8px 4px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: 0.15s;
}
.slot-btn:hover { border-color: #0d6efd; }
.slot-btn.selected {
    background: #0d6efd;
    color: #fff;
    border-color: #0d6efd;
}
.slots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(85px, 1fr));
    gap: 8px;
}