/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    overflow: hidden;
    height: 100vh;
}

/* Split container */
.split-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Left panel - Questions */
.left-panel {
    width: 29%;
    min-width: 300px;
    background: #f8f9fa;
    overflow-y: auto;
    border-right: 2px solid #dee2e6;
    display: flex;
    flex-direction: column;
}

/* Compact header for left panel */
.compact-header {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: white;
    padding: 15px;
    flex-shrink: 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.compact-header h1 {
    font-size: 1.2rem;
    margin-bottom: 5px;
    text-decoration: none;
    border: none;
}

.compact-header .subtitle {
    font-size: 0.85rem;
    opacity: 0.9;
    margin-bottom: 10px;
}

.compact-nav {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.compact-nav a {
    color: white;
    text-decoration: none;
    padding: 4px 10px;
    font-size: 0.85rem;
    border-radius: 3px;
    transition: background 0.2s;
}

.compact-nav a:hover {
    background: rgba(255, 255, 255, 0.1);
}

.compact-nav a.active {
    background: rgba(255, 255, 255, 0.2);
}

/* Filters */
.filters {
    padding: 15px;
    margin: 15px;
    background: #f0f0f0;
    border-radius: 8px;
    border-bottom: 1px solid #dee2e6;
    flex-shrink: 0;
}

.filters input,
.filters select,
.filters button {
    width: 100%;
    padding: 8px;
    margin-bottom: 8px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-size: 0.9rem;
}

.filters button {
    background: #6c757d;
    color: white;
    cursor: pointer;
    transition: background 0.2s;
}

.filters button:hover {
    background: #5a6268;
}

#questionCount {
    display: block;
    text-align: center;
    font-size: 0.85rem;
    color: #6c757d;
    margin-top: 5px;
}

/* Questions list */
#questionsList {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
}

.question-item {
    background: white;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 10px;
    transition: all 0.2s;
}

.question-item:hover {
    border-color: #0056b3;
    box-shadow: 0 2px 4px rgba(0,86,179,0.1);
}

.question-item.highlighted {
    background: #fff3cd;
    border-color: #ffc107;
    animation: highlight-fade 2s ease-in-out;
}

@keyframes highlight-fade {
    0% { background: #ffc107; }
    100% { background: #fff3cd; }
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.question-number-link {
    color: #0056b3;
    text-decoration: none;
    margin-right: 8px;
}

.question-number-link:hover {
    text-decoration: underline;
}

.question-number-link strong {
    font-weight: bold;
}

.question-category {
    padding: 2px 8px;
    border-radius: 3px;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: #495057;
    background: #e9ecef; /* Default */
}

/* Category-specific colors - matching home page */
.question-category[data-category="manufacturing"] {
    background-color: rgba(52, 152, 219, 0.5); /* Blue */
}

.question-category[data-category="dna"] {
    background-color: rgba(231, 76, 60, 0.4); /* Red */
}

.question-category[data-category="safety"] {
    background-color: rgba(46, 204, 113, 0.5); /* Green */
}

.question-category[data-category="regulatory"] {
    background-color: rgba(155, 89, 182, 0.4); /* Purple */
}

.question-category[data-category="genotoxicity"] {
    background-color: rgba(230, 126, 34, 0.4); /* Orange */
}

.question-category[data-category="biodistribution"] {
    background-color: rgba(52, 73, 94, 0.4); /* Dark blue-gray */
}

.question-category[data-category="frameshift"] {
    background-color: rgba(149, 165, 166, 0.6); /* Gray */
}

.question-text {
    font-size: 0.9rem;
    line-height: 1.4;
    color: #212529;
    margin: 8px 0;
}

.question-meta {
    display: flex;
    gap: 10px;
    font-size: 0.8rem;
    color: #6c757d;
    margin-top: 8px;
}

.section-link {
    color: #0056b3;
    text-decoration: none;
    cursor: pointer;
    transition: color 0.2s;
}

.section-link:hover {
    color: #004085;
    text-decoration: underline;
}

/* Right panel - Document */
.right-panel {
    width: 71%;
    flex: 1;
    position: relative;
}

#documentFrame {
    width: 100%;
    height: 100%;
    border: none;
}

/* Scrollbar styling */
.left-panel::-webkit-scrollbar,
#questionsList::-webkit-scrollbar {
    width: 8px;
}

.left-panel::-webkit-scrollbar-track,
#questionsList::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.left-panel::-webkit-scrollbar-thumb,
#questionsList::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

.left-panel::-webkit-scrollbar-thumb:hover,
#questionsList::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* Responsive adjustments */
@media (max-width: 1200px) {
    .left-panel {
        width: 33%;
    }
    .right-panel {
        width: 67%;
    }
}

@media (max-width: 768px) {
    .split-container {
        flex-direction: column;
    }

    .left-panel {
        width: 100%;
        max-width: none;
        height: 50vh;
        border-right: none;
        border-bottom: 2px solid #dee2e6;
        overflow-y: auto; /* Ensure scrollable */
        display: flex;
        flex-direction: column;
    }

    /* Hide category filter on mobile to save space */
    #categoryFilter {
        display: none;
    }

    /* Make questions list scrollable on mobile */
    #questionsList {
        flex: 1;
        overflow-y: auto;
        min-height: 0; /* Important for flex child scrolling */
    }

    .right-panel {
        width: 100%;
        height: 50vh;
    }

    /* Compact mobile navigation */
    .compact-nav {
        display: block;
        font-size: 0.75rem;
        white-space: nowrap;
        overflow-x: auto;
        padding: 5px 0;
    }

    .compact-nav a {
        display: inline;
        padding: 2px 5px;
        margin: 0;
        font-size: 0.75rem;
    }

    .compact-nav a:not(:last-child)::after {
        content: " | ";
        color: rgba(255, 255, 255, 0.5);
        margin: 0 5px;
        text-decoration: none !important;
        display: inline-block;
    }

    .compact-nav a.active {
        font-weight: bold;
        background: none;
        text-decoration: none;
        border-bottom: 2px solid rgba(255, 255, 255, 0.6);
        padding-bottom: 1px;
    }

    /* Smaller header on mobile */
    .compact-header {
        padding: 10px;
    }

    .compact-header h1 {
        font-size: 1rem;
        margin-bottom: 3px;
    }

    .compact-header .subtitle {
        font-size: 0.7rem;
        margin-bottom: 5px;
    }

    /* Compact filters on mobile */
    .filters {
        padding: 10px;
    }

    .filters input,
    .filters select,
    .filters button {
        padding: 5px;
        font-size: 0.8rem;
        margin-bottom: 5px;
    }
}