/* CSS Reset and Variables */
:root {
    --primary-color: #007bff;
    --success-color: #28a745;
    --info-color: #17a2b8;
    --warning-color: #ffc107;
    --orange-color: #fd7e14;
    --danger-color: #dc3545;
    --dark-color: #343a40;
    --light-color: #f8f9fa;
    --border-radius: 8px;
    --box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --transition-speed: 0.3s;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

/* Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--light-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Improved Container */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem;
}

@media (min-width: 768px) {
    .container {
        padding: 2rem;
    }
}

/* Enhanced Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: 8px 16px;
    z-index: 9999;
    text-decoration: none;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    font-weight: 500;
    transition: top var(--transition-speed) ease-in-out;
    border: 2px solid transparent;
}

.skip-link:focus {
    top: 0;
    outline: none;
    border-color: white;
    box-shadow: 0 0 0 3px var(--primary-color);
}

/* Improved Navigation */
.navbar {
    background: var(--dark-color);
    padding: 1rem 0;
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 1020;
    transition: padding var(--transition-speed) ease;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
    letter-spacing: -0.5px;
    transition: color var(--transition-speed) ease;
}

.navbar-brand:hover {
    color: var(--primary-color);
}

/* Tooltip Styles */
.tooltip {
    position: absolute;
    z-index: 1070;
    display: block;
    margin: 0;
    font-family: var(--font-family);
    font-style: normal;
    font-weight: 400;
    line-height: 1.5;
    text-align: left;
    text-decoration: none;
    text-shadow: none;
    text-transform: none;
    letter-spacing: normal;
    word-break: normal;
    word-spacing: normal;
    white-space: normal;
    line-break: auto;
    font-size: 0.875rem;
    opacity: 0;
    transition: opacity var(--transition-speed) ease-in-out;
}

.tooltip.show {
    opacity: 0.9;
}

/* Card Styles */
.card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: transform var(--transition-speed) ease,
                box-shadow var(--transition-speed) ease;
}

/* Table Container Styles */
.table-container {
    width: 100%;
    overflow-x: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* Survey table: category headers travel while scrolling */
.table-responsive.survey-scroll {
    max-height: calc(100vh - 11rem);
    overflow: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--border-radius);
}

.table-responsive.survey-scroll thead th {
    position: sticky;
    top: 0;
    z-index: 5;
    font-weight: 600;
    background-color: var(--dark-color);
    color: white;
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2);
}

.sticky-header {
    position: sticky;
    top: 0;
    z-index: 10;
}

/* Table Styles */
.table {
    width: 100%;
    margin-bottom: 1rem;
    background-color: transparent;
    border-collapse: separate;
    border-spacing: 0;
}

/* Table Header and Cell Styles */
.table th,
.table td {
    padding: 0.75rem;
    vertical-align: middle;
    border-top: 1px solid #dee2e6;
}

.table th {
    font-weight: 600;
    background-color: var(--dark-color);
    color: white;
}

/* Category Colors */
.bg-yes { background-color: var(--success-color) !important; }
.bg-yes-maybe { background-color: var(--info-color) !important; }
.bg-maybe { background-color: var(--warning-color) !important; }
.bg-no-maybe { background-color: var(--orange-color) !important; }
.bg-no { background-color: var(--danger-color) !important; }

/* High Contrast Mode */
@media (forced-colors: active) {
    .card,
    .form-control,
    .btn {
        border: 2px solid ButtonText;
    }

    .chart-container {
        border: 2px solid ButtonText;
    }
    
    .category-card {
        border: 2px solid ButtonText;
    }
    
    .category-card .card-header {
        border-bottom: 1px solid ButtonText;
    }
}

/* Print Styles */
@media print {
    .no-print {
        display: none !important;
    }

    .container {
        width: 100%;
        max-width: none;
        padding: 0;
    }

    .card {
        box-shadow: none;
        border: 1px solid #dee2e6;
    }

    .table th {
        background-color: #f8f9fa !important;
        color: #000 !important;
    }

    .chart-container {
        height: auto;
        page-break-inside: avoid;
    }
    
    .category-card {
        break-inside: avoid;
    }
    
    .btn-group {
        display: none;
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .chart-container,
    .category-card,
    .list-group-item {
        transition: none;
    }
    
    .count-updated {
        animation: none;
    }
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus Styles */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Improved Form Styles */
.form-control {
    border-radius: var(--border-radius);
    border: 1px solid #dee2e6;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: border-color var(--transition-speed) ease-in-out,
                box-shadow var(--transition-speed) ease-in-out;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
    outline: none;
}

/* Improved Toast Styles */
.toast-container {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    z-index: 1050;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin: 0;
    opacity: 0;
    transform: translateX(100%);
    transition: all var(--transition-speed) ease-in-out;
}

.toast.showing {
    opacity: 1;
    transform: translateX(0);
}

/* Improved Progress Bar */
.progress {
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
    background-color: rgba(0, 0, 0, 0.1);
}

.progress-bar {
    transition: width var(--transition-speed) ease,
                background-color var(--transition-speed) ease;
}

/* Enhanced Chart Styles */
.chart-container {
    position: relative;
    height: 400px;
    width: 100%;
    background: white;
    border-radius: var(--border-radius);
    transition: opacity var(--transition-speed) ease-in-out;
    opacity: 1;
}

.chart-container.loading {
    opacity: 0;
}

/* Improved List View */
#listView .card {
    height: 100%;
    margin-bottom: 0;
}

#listView .card-body {
    padding: 1rem;
    max-height: 300px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(0, 0, 0, 0.2) transparent;
}

#listView .card-body::-webkit-scrollbar {
    width: 6px;
}

#listView .card-body::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

/* Enhanced Feature Section */
.feature-section {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
}

.feature-category {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
    border-radius: 10px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.feature-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
    background-position: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

.feature-category:hover::before {
    opacity: 1;
}

.feature-category > * {
    position: relative;
    z-index: 1;
}

.feature-subtitle {
    color: #007bff;
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    color: #495057;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.feature-list li i {
    margin-right: 0.75rem;
    color: #007bff;
    font-size: 1.1rem;
    transition: transform 0.2s ease;
}

.feature-list li:hover i {
    transform: scale(1.2);
}

.feature-list li:hover {
    color: #007bff;
    transform: translateX(5px);
}

.features-container {
    margin-top: 2rem;
}

.features-title {
    color: #343a40;
    font-weight: 600;
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
    text-align: center;
    position: relative;
    padding-bottom: 1rem;
}

.features-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, #007bff, #00ff88);
    border-radius: 3px;
}

/* Category Card Styles */
.category-card {
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    border: none;
    overflow: hidden;
}

.category-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.category-card .card-header {
    padding: 1rem;
    border-bottom: none;
}

.category-card .list-group-item {
    padding: 0.75rem 1rem;
    border: none;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: background-color var(--transition-speed);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.category-card .list-group-item:last-child {
    border-bottom: none;
}

.category-card .list-group-item:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

/* Response Summary */
.response-summary {
    margin-bottom: 2rem;
    border: none;
    box-shadow: var(--box-shadow);
}

.response-summary .card-body {
    padding: 1.5rem;
}

/* Count Animation */
.count-updated {
    animation: countUpdate 0.3s ease-in-out;
}

@keyframes countUpdate {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

/* View Toggle Buttons */
.btn-check:checked + .btn-outline-light {
    background-color: rgba(255, 255, 255, 0.2);
    border-color: transparent;
}

.btn-check + .btn-outline-light {
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-check + .btn-outline-light:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.7);
}

/* List View */
#listView {
    opacity: 1;
    transition: opacity var(--transition-speed);
}

#listView.d-none {
    opacity: 0;
}

/* Unanswered Highlight Styles */
.unanswered {
    transition: background-color 0.3s ease;
}

.highlight-pulse {
    animation: pulse-warning 2s ease-in-out;
}

@keyframes pulse-warning {
    0% { background-color: var(--bs-table-striped-bg); }
    25% { background-color: var(--warning-color); }
    50% { background-color: var(--bs-table-striped-bg); }
    75% { background-color: var(--warning-color); }
    100% { background-color: var(--bs-table-striped-bg); }
}

#unansweredCounter {
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

#unansweredCounter:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

#unansweredCounter button {
    transition: all 0.2s ease;
}

#unansweredCounter button:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    .container {
        padding: 1rem;
    }

    .card-header, .card-body {
        padding: 1rem;
    }

    .table th,
    .table td {
        padding: 0.75rem;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .feature-section {
        padding: 1rem;
    }

    .chart-container {
        height: 300px;
    }
    
    .category-card .card-body {
        padding: 0.75rem;
    }
    
    .category-card .list-group-item {
        padding: 0.5rem 0.75rem;
    }
}