/* --- Main Container & Theme --- */
:root {
    --wsc-primary-color: #4a90e2;
    --wsc-primary-hover: #357abd;
    --wsc-danger-color: #d0021b;
    --wsc-danger-hover: #a80215;
    --wsc-bg-color: #f8f9fa;
    --wsc-card-bg: #ffffff;
    --wsc-border-color: #dee2e6;
    --wsc-text-color: #495057;
    --wsc-text-light: #6c757d;
    --wsc-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --wsc-border-radius: 8px;
    --wsc-box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.wsc-container {
    font-family: var(--wsc-font-family);
    background-color: var(--wsc-bg-color);
    color: var(--wsc-text-color);
    padding: 25px;
    margin: 20px auto;
    max-width: 800px;
    border-radius: var(--wsc-border-radius);
    box-shadow: var(--wsc-box-shadow);
    border: 1px solid var(--wsc-border-color);
}

/* --- Header --- */
.wsc-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    flex-wrap: wrap;
    gap: 15px;
}

.wsc-title {
    font-size: 1.75rem;
    color: var(--wsc-text-color);
    margin: 0;
}

/* --- Unit Switcher --- */
.wsc-unit-switcher {
    display: flex;
    align-items: center;
    gap: 10px;
}
.wsc-unit-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--wsc-text-light);
    transition: color 0.3s ease;
}
.wsc-unit-label-active {
    color: var(--wsc-primary-color);
}
.wsc-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
}
.wsc-switch input { display: none; }
.wsc-slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 28px;
}
.wsc-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}
input:checked + .wsc-slider { background-color: var(--wsc-primary-color); }
input:checked + .wsc-slider:before { transform: translateX(22px); }

/* --- Wall Card --- */
.wsc-wall-card {
    background: var(--wsc-card-bg);
    border: 1px solid var(--wsc-border-color);
    border-radius: var(--wsc-border-radius);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--wsc-box-shadow);
    transition: box-shadow 0.3s ease;
}
.wsc-wall-card:hover {
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.08);
}
.wsc-wall-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--wsc-border-color);
}
.wsc-wall-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
}
.wsc-input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}
.wsc-input-wrapper {
    flex: 1;
    min-width: 120px;
}
.wsc-input-wrapper label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 5px;
    color: var(--wsc-text-light);
}
.wsc-input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--wsc-border-color);
    border-radius: 6px;
    font-size: 1rem;
    box-sizing: border-box;
    transition: border-color 0.3s, box-shadow 0.3s;
}
.wsc-input:focus {
    outline: none;
    border-color: var(--wsc-primary-color);
    box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
}

/* --- Surfaces (Doors, Windows) --- */
.wsc-surfaces-container {
    margin-top: 15px;
}
.wsc-surface-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}
.wsc-surface-row .wsc-input-wrapper { flex: 1; }
.wsc-surface-label {
    margin-right: 10px;
    font-weight: 500;
}

/* --- Buttons --- */
.wsc-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border: none;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s;
    text-decoration: none;
    color: white;
}
.wsc-btn:active {
    transform: translateY(1px);
}
.wsc-btn-primary { background-color: var(--wsc-primary-color); }
.wsc-btn-primary:hover { background-color: var(--wsc-primary-hover); }
.wsc-btn-secondary { background-color: #6c757d; color: white; }
.wsc-btn-secondary:hover { background-color: #5a6268; }
.wsc-btn-danger { background-color: var(--wsc-danger-color); }
.wsc-btn-danger:hover { background-color: var(--wsc-danger-hover); }
.wsc-btn-icon {
    background: transparent;
    border: none;
    color: var(--wsc-text-light);
    padding: 5px;
    cursor: pointer;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.wsc-btn-icon.wsc-btn-danger:hover { 
    background-color: #fbeae9; 
    color: var(--wsc-danger-color); 
}

.wsc-controls { 
    margin-top: 20px; 
    display: flex; 
    gap: 10px; 
    width: 100%;
}

/* --- Results Summary --- */
.wsc-results-summary {
    background-color: var(--wsc-card-bg);
    border: 1px solid var(--wsc-border-color);
    border-radius: var(--wsc-border-radius);
    padding: 25px;
    margin-top: 30px;
}
.wsc-results-title {
    font-size: 1.5rem;
    margin-top: 0;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--wsc-border-color);
}
.wsc-results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}
.wsc-result-item {
    background-color: var(--wsc-bg-color);
    padding: 15px;
    border-radius: 6px;
}
.wsc-result-label {
    display: block;
    font-size: 0.9rem;
    color: var(--wsc-text-light);
    margin-bottom: 5px;
}
.wsc-result-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--wsc-primary-color);
}
#wsc-per-wall-summary {
    display: grid;
    gap: 10px;
}
.wsc-wall-summary-item {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    border-radius: 4px;
    background-color: #f8f9fa;
}
.wsc-wall-summary-item span:first-child { font-weight: 600; }