/* 
 * Solar Builder Premium Styles
 * Using modern, vibrant aesthetics with glassmorphism and micro-animations.
 */

:root {
    --sb-primary: #00d2ff;
    --sb-secondary: #3a7bd5;
    --sb-text: #2d3748;
    --sb-text-light: #718096;
    --sb-bg: #f7fafc;
    --sb-white: rgba(255, 255, 255, 0.85);
    --sb-border: rgba(255, 255, 255, 0.4);
    --sb-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    --sb-radius: 16px;
}

.sb-container {
    max-width: 800px;
    margin: 40px auto;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--sb-text);
    background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
    padding: 40px;
    border-radius: var(--sb-radius);
    box-shadow: var(--sb-shadow);
    border: 1px solid var(--sb-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.sb-header {
    text-align: center;
    margin-bottom: 40px;
}

.sb-header h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 10px;
    background: linear-gradient(to right, var(--sb-primary), var(--sb-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sb-header p {
    color: var(--sb-text-light);
    font-size: 1.1rem;
}

.sb-step {
    background: var(--sb-white);
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.02);
    border: 1px solid rgba(255,255,255,0.6);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.sb-step:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.05);
}

.sb-step label {
    display: block;
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--sb-text);
}

.sb-range-wrapper {
    display: flex;
    align-items: center;
    gap: 20px;
}

input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 24px;
    width: 24px;
    border-radius: 50%;
    background: var(--sb-primary);
    cursor: pointer;
    margin-top: -8px;
    box-shadow: 0 0 10px rgba(0, 210, 255, 0.4);
    transition: transform 0.1s;
}

input[type=range]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 8px;
    cursor: pointer;
    background: #e2e8f0;
    border-radius: 4px;
}

input[type=range]:focus {
    outline: none;
}

.sb-range-value {
    min-width: 90px;
    text-align: right;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--sb-secondary);
}

.sb-btn {
    display: block;
    width: 100%;
    padding: 16px;
    font-size: 1.2rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #fff;
    background: linear-gradient(135deg, var(--sb-primary), var(--sb-secondary));
    border: none;
    border-radius: var(--sb-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(58, 123, 213, 0.4);
    margin-top: 30px;
}

.sb-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(58, 123, 213, 0.5);
}

.sb-btn:active {
    transform: translateY(1px);
}

/* Results Grid */
#sb-results-container {
    margin-top: 40px;
    border-top: 1px solid #e2e8f0;
    padding-top: 30px;
}

.sb-results-hidden {
    display: none;
}

.sb-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
}

.sb-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
}

.sb-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.sb-card-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.sb-card-content {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.sb-card-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-top: 0;
    margin-bottom: 10px;
}

.sb-card-specs {
    font-size: 0.9rem;
    color: var(--sb-text-light);
    margin-bottom: 15px;
    flex-grow: 1;
}

.sb-card-specs p {
    margin: 4px 0;
}

.sb-card-price {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--sb-secondary);
    margin-bottom: 15px;
}

.sb-card-btn {
    display: inline-block;
    text-align: center;
    padding: 10px;
    background: #edf2f7;
    color: var(--sb-text);
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: background 0.2s;
}

.sb-card-btn:hover {
    background: #e2e8f0;
}

.sb-no-results {
    text-align: center;
    padding: 30px;
    color: var(--sb-text-light);
    font-size: 1.1rem;
    background: rgba(255,255,255,0.5);
    border-radius: 8px;
}

/* Loader */
.sb-loader {
    border: 4px solid rgba(0, 0, 0, 0.1);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border-left-color: var(--sb-primary);
    animation: sb-spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes sb-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@media (max-width: 600px) {
    .sb-container {
        padding: 20px;
        margin: 20px;
    }
}