:root {
    --bg-color: #1e1e24;
    --surface-color: #2a2a33;
    --primary-color: #00aaff;
    --secondary-color: #4b5563;
    --danger-color: #ef4444;
    --text-color: #f0f0f0;
    --label-color: #aaa;
    --border-color: #444;
    --success-color: #4CAF50;
    --highlight-color: #373741;
    --analyze-color-start: #00aaff;
    --analyze-color-end: #0066ff;
    --positive-color: #4CAF50;
    --negative-color: #ef4444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0.5rem;
}

/* Spinner Overlay */
#spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    font-size: 1.2em;
}

.spinner {
    border: 8px solid var(--surface-color);
    border-top: 8px solid var(--primary-color);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

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


.container {
    width: 100%;
    max-width: 1600px;
    height: calc(100vh - 1rem);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
}

.header {
    text-align: center;
    flex-shrink: 0;
}
.header h1 {
    color: var(--primary-color);
    border-bottom: none;
    margin: 0.5rem 0;
    font-size: 1.8em;
}

/* --- Main 2-Column Layout --- */
.main-layout {
    flex-grow: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    overflow: hidden;
}

.left-column {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    overflow-y: auto;
}

.right-column #results-wrapper {
    position: sticky;
    top: 0.5rem;
    height: calc(100vh - 1.5rem - 40px);
    overflow-y: auto;
}

.quadrant {
    background: var(--surface-color);
    border-radius: 8px;
    padding: 0.5rem 1rem;
    flex-shrink: 0;
}

h2 {
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 4px;
    margin: 0 0 1rem 0;
    font-size: 1.2em;
}
h3 {
    color: var(--primary-color);
    margin: 0 0 0.5rem 0;
    padding: 0;
    border: none;
    font-size: 1em;
}
.form-section {
    padding-top: 0.5rem;
}
.input-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem 1rem;
    margin-top: 0.5rem;
}
.input-group {
    display: flex;
    flex-direction: column;
}
.input-group.full-width-grid {
    grid-column: 1 / -1;
}

label {
    color: var(--label-color);
    margin-bottom: 2px;
    font-size: 0.8em;
}

input[type="number"], input[type="text"], select, textarea {
    background-color: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 6px;
    border-radius: 4px;
    font-size: 0.9em;
    width: 100%;
    box-sizing: border-box;
    font-family: inherit;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}
textarea {
    resize: vertical;
}
.power-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
}
.power-toggle input[type="number"] {
    flex-grow: 1;
}
.power-toggle label {
    margin-bottom: 0;
    white-space: nowrap;
}

.main-actions-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 1rem;
    align-items: flex-end;
    margin-bottom: 1rem;
}

.ai-selection {
    display: flex;
    flex-direction: column;
}
.ai-selection label {
    margin-bottom: 2px;
}

.btn-analyze {
    padding: 12px;
    font-size: 1.1em;
    font-weight: bold;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    background: linear-gradient(45deg, var(--analyze-color-start), var(--analyze-color-end));
    transition: transform 0.2s;
}
.btn-analyze:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}


.actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.5rem;
    margin-top: 0.5rem;
}

button {
    color: #fff;
    border: none;
    padding: 8px;
    font-size: 0.9em;
    font-weight: bold;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}
button:disabled {
    background-color: var(--secondary-color);
    cursor: not-allowed;
    opacity: 0.6;
}
.btn-primary { background-color: var(--primary-color); }
.btn-secondary { background-color: var(--secondary-color); }
.btn-danger { background-color: var(--danger-color); }

.db-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
.load-section, .compare-section {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.load-delete-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}
.confirm-dialog {
    display: grid;
    grid-template-columns: auto 1fr 1fr;
    gap: 0.5rem;
    align-items: center;
    padding: 4px;
    border-radius: 4px;
}
.confirm-dialog button { padding: 4px; font-size: 0.8em; }

#results { padding: 0.5rem 1rem; }
#results .placeholder { text-align: center; color: var(--label-color); padding: 2rem 1rem;}
#results .placeholder h2, #ai-results .placeholder h2 { border: none; }

.results-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4px;
}
.result-item {
    background-color: var(--highlight-color);
    padding: 6px 8px;
    border-radius: 4px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.result-item .label { font-size: 0.8em; }
.result-item .value { font-size: 1.1em; font-weight: bold; }
.result-item .unit { font-size: 0.8em; color: var(--label-color); margin-left: 4px;}

.score {
    padding: 8px;
    background: linear-gradient(45deg, var(--primary-color), var(--success-color));
}
.score .value { font-size: 1.8em; color: white; }
.score .unit { color: white; opacity: 0.8; }

.compare-table { width: 100%; border-collapse: collapse; margin-top: 0.5rem; }
.compare-table th, .compare-table td { padding: 6px 8px; border-bottom: 1px solid var(--border-color); font-size: 0.9em; }
.compare-table td:not(:first-child) { text-align: right; }
.compare-table .diff { font-size: 0.8em; margin-left: 8px; }
.better { background-color: rgba(76, 175, 80, 0.2); }
.positive { color: var(--positive-color); }
.negative { color: var(--negative-color); }

/* Collapsible & AI Results Styling */
.collapsible-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.toggle-icon {
    display: none; /* Hidden by default, shown on mobile */
    transition: transform 0.3s ease;
    border: 1px solid var(--label-color);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    justify-content: center;
    align-items: center;
}
.toggle-icon::before {
    content: '▼';
    font-size: 10px;
    color: var(--label-color);
}
.collapsible-header.active .toggle-icon {
    transform: rotate(180deg);
}

.ai-content {
    line-height: 1.6;
    font-size: 0.95em;
}
.ai-content h1, .ai-content h2, .ai-content h3 {
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 5px;
    margin-top: 1.5em;
    margin-bottom: 0.8em;
}
.ai-content h1 { font-size: 1.4em; }
.ai-content h2 { font-size: 1.2em; }
.ai-content h3 { font-size: 1.1em; border-bottom: none;}
.ai-content ul {
    list-style-type: disc;
    padding-left: 20px;
}
.ai-content li {
    margin-bottom: 0.5em;
}
.ai-content strong {
    color: var(--text-color);
    font-weight: bold;
}
.ai-content code {
    background-color: var(--bg-color);
    padding: 2px 5px;
    border-radius: 4px;
    font-family: monospace;
}
.ai-content pre {
    background-color: var(--bg-color);
    padding: 10px;
    border-radius: 5px;
    white-space: pre-wrap;
    word-wrap: break-word;
}


/* Responsive adjustments */
@media (max-width: 1200px) {
    .main-layout {
        grid-template-columns: 1fr;
        overflow: visible;
        height: auto;
    }
    .left-column, .right-column #results-wrapper {
        overflow-y: visible;
        position: static;
        height: auto;
    }
    .input-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .input-grid {
        grid-template-columns: 1fr;
    }
    .main-actions-grid {
        grid-template-columns: 1fr;
    }
    .db-actions {
        grid-template-columns: 1fr;
    }
    .collapsible-header {
        cursor: pointer;
    }
    .toggle-icon {
        display: inline-flex;
    }
    .collapsible-header.active + .collapsible-content {
        display: block; /* JS will use slideToggle which sets display to block */
    }
}