:root {
    /* Epic Bright Theme Palette */
    --bg-color: #f4f7fc; /* Clean, light background */
    --primary-container: #ffffff;
    --secondary-container: #eef2f9;
    --font-color: #333333; /* Darker text for readability */
    
    /* Vibrant Accent Colors */
    --accent-primary: #e94560; /* Vibrant Pink/Red */
    --accent-secondary: #8a43e3; /* Rich Purple */
    --accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    
    /* Other UI Colors */
    --border-color: #d8e0f0;
    --input-bg: #ffffff;
    --button-text: #ffffff;
    
    --shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-color);
    color: var(--font-color);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    padding: 2rem;
}

.container {
    width: 100%;
    max-width: 900px;
    background: var(--primary-container);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

header {
    background: var(--accent-gradient);
    padding: 1.5rem;
    text-align: center;
}

header h1 {
    font-size: 2rem;
    font-weight: 600;
    color: #fff;
    letter-spacing: 1px;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.2);
}

.tabs {
    display: flex;
    background-color: var(--secondary-container);
    border-bottom: 3px solid var(--border-color);
}

.tab-link {
    flex-grow: 1;
    padding: 1rem;
    cursor: pointer;
    border: none;
    background: transparent;
    color: #555;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
    text-transform: uppercase;
    border-bottom: 3px solid transparent;
    margin-bottom: -3px; /* Align with parent border */
}

.tab-link:hover {
    color: var(--accent-primary);
}

.tab-link.active {
    color: var(--accent-secondary);
    border-bottom: 3px solid var(--accent-secondary);
}

.tab-content {
    display: none;
    padding: 2rem;
    animation: fadeIn 0.5s;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.form-section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: var(--secondary-container);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.form-section h2 {
    margin-bottom: 1.5rem;
    color: var(--accent-secondary);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
    font-size: 1.2rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.input-group label, .input-group-checkbox label {
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #444;
}

input[type="number"], select {
    width: 100%;
    padding: 0.8rem;
    background: var(--input-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--font-color);
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

input[type="number"]:focus, select:focus {
    outline: none;
    border-color: var(--accent-secondary);
    box-shadow: 0 0 10px rgba(138, 67, 227, 0.2);
}

input:disabled {
    background-color: #e9ecef;
    cursor: not-allowed;
}

input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--accent-primary);
}

.controls {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 1rem;
    margin-top: 2rem;
}

.calc-btn, .clear-btn {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    color: var(--button-text);
}

.calc-btn {
    background: var(--accent-gradient);
}

.clear-btn {
    background-color: #6c757d;
}

.calc-btn:hover, .clear-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.2);
}

.result {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-secondary);
}

/* Slider styles */
.slider-container {
    padding: 1rem 0;
}
.slider {
    -webkit-appearance: none;
    width: 100%;
    height: 10px;
    border-radius: 5px;
    background: var(--border-color);
    outline: none;
    margin: 1rem 0;
}
.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 25px;
    height: 25px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    box-shadow: 0 0 10px var(--accent-primary);
    transition: transform 0.2s;
}
.slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}
.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: #666;
}

/* Comfort Toggle */
.toggle-switch {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}
.switch-label {
    padding: 0.8rem 1.5rem;
    background: var(--primary-container);
    cursor: pointer;
    transition: all 0.3s;
    color: #555;
}
.switch-label input { display: none; }
.switch-label:has(input:checked) {
    background: var(--accent-secondary);
    color: #fff;
}

/* Summary Tab */
.summary-container { text-align: center; }
.summary-scores {
    background: var(--secondary-container);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
}
.summary-scores p {
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    display: flex;
    justify-content: space-between;
}
.summary-scores span {
    font-weight: 600;
}
.summary-total h3 {
    font-size: 3.5rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.summary-status {
    padding: 1.5rem;
    border-radius: var(--border-radius);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: #fff;
    transition: background-color 0.5s;
}
/* Color blind friendly status colors */
.summary-status.red { background-color: #d1495b; } /* Red */
.summary-status.orange { background-color: #ed872d; } /* Orange */
.summary-status.yellow { background-color: #f7d002; color: #333; } /* Yellow */
.summary-status.green { background-color: #00b289; } /* Green */
.summary-status.pending { background-color: #6c757d; } /* Gray */

.refresh-btn { margin: 0 auto; display: block; }
/* Adds space between checkboxes and their text labels */
.input-group-checkbox {
    display: flex;
    align-items: center;
    gap: 8px; /* Adjust this value for more or less space */
}

/*
============================================
MOBILE RESPONSIVE STYLES
============================================
*/
@media (max-width: 768px) {
    body {
        padding: 0;
        -webkit-text-size-adjust: 100%; /* Prevents text resizing on mobile Safari */
    }

    .container {
        max-width: 100%;
        border-radius: 0;
        border: none;
        box-shadow: none;
    }

    header {
        padding: 1rem;
    }

    header h1 {
        font-size: 1.5rem;
    }

    /* --- Responsive Tabs --- */
    .tabs {
        flex-direction: column; /* Stack tabs vertically */
        border-bottom: none;
    }

    .tab-link {
        text-align: left;
        border-bottom: 1px solid var(--border-color);
        margin-bottom: 0;
        border-radius: 0;
    }
    
    .tab-link.active {
        border-bottom: 1px solid var(--border-color); /* Reset bottom border */
        border-left: 4px solid var(--accent-secondary); /* Highlight active tab on the side */
        background-color: var(--primary-container);
    }

    .tab-content {
        padding: 1.5rem 1rem; /* Adjust padding for mobile */
    }

    /* --- Responsive Grids & Controls --- */
    .form-grid {
        grid-template-columns: 1fr; /* Force single column for simplicity */
    }

    .form-section {
        padding: 1rem;
    }

    .controls {
        flex-direction: column;
    }

    .calc-btn, .clear-btn {
        width: 100%;
    }
}