/* CSS Variables for a modern, dual-theme setup */
:root {
    /* Dark Mode (Default) */
    --primary-gradient: linear-gradient(135deg, #8b5cf6 0%, #a855f7 100%);
    --primary-color: #8b5cf6;
    --text-color: #f8fafc;
    --light-text: #cbd5e1;
    --muted-text: #94a3b8;
    --border-color: #475569;
    --light-border: #334155;
    --container-bg: #1e293b;
    --card-bg: #334155;
    --input-bg: #334155;
    --focus-shadow: rgba(139, 92, 246, 0.2);
    --shadow-light: rgba(0, 0, 0, 0.2);
    --shadow-medium: rgba(0, 0, 0, 0.3);
    
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
}

html.light {
    /* Light Mode */
    --primary-gradient: linear-gradient(135deg, #8b5cf6 0%, #a855f7 100%);
    --primary-color: #8b5cf6;
    --text-color: #1e293b;
    --light-text: #475569;
    --muted-text: #64748b;
    --border-color: #cbd5e1;
    --light-border: #e2e8f0;
    --container-bg: #ffffff;
    --card-bg: #f8fafc;
    --input-bg: #f1f5f9;
    --focus-shadow: rgba(139, 92, 246, 0.2);
    --shadow-light: rgba(0, 0, 0, 0.05);
    --shadow-medium: rgba(0, 0, 0, 0.1);
}

.calculator-wrapper {
    background: var(--container-bg);
    border-radius: var(--radius-2xl);
    box-shadow: 0 20px 25px -5px var(--shadow-medium), 0 10px 10px -5px var(--shadow-light);
    overflow: hidden;
    border: 1px solid var(--light-border);
    transition: background 0.3s ease-in-out, border-color 0.3s ease-in-out;
    color: var(--text-color);
}

/* Glass Morphism Header */
.glass-header {
    background: rgba(59, 130, 246, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(59, 130, 246, 0.2);
    transition: background 0.3s ease-in-out, border-bottom-color 0.3s ease-in-out;
}

html.light .glass-header {
     background: rgba(255, 255, 255, 0.6);
     border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

html.light .glass-header h1 {
    color: #1e293b;
}

html.light .glass-header p {
    color: #3b82f6;
}

/* Form Styling */
.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--input-bg);
    color: var(--text-color);
    box-shadow: 0 1px 3px var(--shadow-light);
}

.form-input::placeholder, .form-select::placeholder, .form-textarea::placeholder {
    color: var(--muted-text);
}

html.light .form-input::placeholder, html.light .form-select::placeholder, html.light .form-textarea::placeholder {
    color: var(--muted-text);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--focus-shadow), 0 4px 6px -1px var(--shadow-light);
}

.form-select {
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238b5cf6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 20px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

/* Button Styling */
.calc-button {
    width: 100%;
    padding: 0.875rem 1.5rem;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1.125rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 6px -1px var(--shadow-medium);
}
.calc-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(139, 92, 246, 0.3);
}

.download-button, .copy-button {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    transition: background-color 0.3s ease-in-out, border-color 0.3s ease-in-out;
    color: var(--text-color);
}
.download-button:hover, .copy-button:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}


/* AI Report Styles */
#aiResults h3 {
    font-size: 1.5rem; /* text-2xl */
    line-height: 2rem;
    font-weight: 700; /* font-bold */
    color: var(--text-color);
    margin-bottom: 1rem; /* mb-4 */
    border-bottom: 1px solid var(--light-border);
    padding-bottom: 0.5rem; /* pb-2 */
}
#aiResults h4 {
    font-size: 1.125rem; /* text-lg */
    font-weight: 600; /* font-semibold */
    color: var(--text-color);
    margin-top: 1.5rem; /* mt-6 */
    margin-bottom: 0.75rem; /* mb-3 */
    text-decoration: underline;
}
#aiResults ul {
    list-style-type: disc;
    list-style-position: inside;
    color: var(--light-text);
    margin-bottom: 1rem;
}
#aiResults ul li {
    margin-top: 0.5rem; /* space-y-2 */
}
#aiResults strong {
    color: var(--text-color);
}
#aiResults .report-card {
    padding: 1rem; /* p-4 */
    margin-bottom: 1.5rem; /* mb-6, Increased spacing for readability */
    border-radius: 0.375rem; /* rounded-md */
    border-left-width: 4px;
}
#aiResults .report-risk {
    background-color: rgba(239, 68, 68, 0.05);
    border-color: #ef4444; /* red-500 */
}
#aiResults .report-recommendation {
    background-color: rgba(59, 130, 246, 0.05);
    border-color: #3b82f6; /* blue-500 */
}
#aiResults .report-alert {
     background-color: rgba(234, 179, 8, 0.05);
     border-color: #eab308; /* yellow-500 */
}
 #aiResults table {
    width: 100%;
    margin-top: 1rem;
    border-collapse: collapse;
}
#aiResults th, #aiResults td {
    text-align: left;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--light-border);
}
#aiResults th {
    background-color: var(--card-bg);
    font-weight: 600;
}
#aiResults .cost-range {
    font-weight: 700;
    color: #f87171; /* red-400 */
}

/* Section headers */
.calculator-wrapper h2 {
    color: var(--text-color);
    border-color: var(--border-color);
}