:root {
    /* Soft Blues & Greens Palette - Light/Clean Theme */
    --bg-base: #F8FAFC;
    --bg-surface: #FFFFFF;
    --bg-panel: #F1F5F9;
    
    --primary: #0EA5E9; /* Sky Blue */
    --primary-hover: #0284C7;
    --primary-light: #E0F2FE;
    
    --secondary: #10B981; /* Emerald Green */
    --secondary-hover: #059669;
    --secondary-light: #D1FAE5;
    
    --text-main: #0F172A;
    --text-muted: #64748B;
    
    --border: #E2E8F0;
    --border-strong: #CBD5E1;
    
    --critical: #EF4444;
    --critical-bg: #FEE2E2;
    --warning: #F59E0B;
    --warning-bg: #FEF3C7;
    --passing: #10B981;
    --passing-bg: #D1FAE5;
    --info: #3B82F6;
    --info-bg: #DBEAFE;
    
    --radius: 12px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-base);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
    line-height: 1.5;
}

/* Layout */
.app-layout {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--bg-surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 10;
}

.brand {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border);
}
.brand-icon {
    width: 32px; height: 32px;
    background-color: var(--bg-panel);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}
.brand h1 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.01em;
}

.nav-menu {
    flex: 1;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    color: var(--text-muted);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}
.nav-item i {
    width: 18px; height: 18px;
}
.nav-item:hover {
    background-color: var(--bg-panel);
    color: var(--text-main);
}
.nav-item.active {
    background-color: var(--primary-light);
    color: var(--primary);
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border);
}
.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.avatar {
    width: 36px; height: 36px;
    background-color: var(--bg-panel);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}
.user-info {
    display: flex;
    flex-direction: column;
}
.user-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-main);
}
.user-status {
    font-size: 0.75rem;
    color: var(--secondary);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.topbar {
    height: 70px;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
}

.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}
.breadcrumbs .separator {
    width: 14px; height: 14px;
}
.breadcrumbs .current {
    font-weight: 600;
    color: var(--text-main);
}

.actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    font-family: inherit;
}
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--primary);
    color: #fff;
    box-shadow: var(--shadow-sm);
}
.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-strong);
    color: var(--text-main);
}
.btn-outline:hover:not(:disabled) {
    background-color: var(--bg-panel);
    border-color: var(--text-muted);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
}

/* Views Container */
.views-container {
    flex: 1;
    position: relative;
    overflow: hidden;
    padding: 2rem;
}
.view {
    position: absolute;
    top: 2rem; left: 2rem; right: 2rem; bottom: 2rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
    display: flex;
}
.view.active {
    opacity: 1;
    visibility: visible;
    z-index: 10;
}

/* Auditor Grid */
.auditor-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    width: 100%;
    height: 100%;
}

.panel {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.full-panel {
    width: 100%;
    height: 100%;
}

.panel-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-surface);
}
.panel-header h2 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
}

.panel-body {
    flex: 1;
    overflow: auto;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-base);
}

/* Input Styles */
.framework-select select {
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    border: 1px solid var(--border-strong);
    background-color: var(--bg-surface);
    font-family: inherit;
    font-size: 0.85rem;
    color: var(--text-main);
    outline: none;
    cursor: pointer;
}

.help-text {
    padding: 1rem 1.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    background-color: var(--bg-surface);
}

.editor-container {
    flex: 1;
    display: flex;
    padding: 1rem;
    background-color: #282C34; /* Atom One Dark BG */
    margin: 0 1.5rem 1.5rem;
    border-radius: 8px;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}

.code-editor {
    width: 100%;
    height: 100%;
    background: transparent;
    color: #ABB2BF;
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    border: none;
    resize: none;
    outline: none;
    line-height: 1.5;
}

/* Results Stats */
.score-badge {
    display: flex;
    align-items: baseline;
    font-weight: 700;
}
.score-value {
    font-size: 1.5rem;
    color: var(--text-main);
}
.score-total {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-left: 0.1rem;
}
.score-badge.excellent .score-value { color: var(--passing); }
.score-badge.good .score-value { color: var(--warning); }
.score-badge.poor .score-value { color: var(--critical); }

.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}
.empty-icon {
    width: 64px; height: 64px;
    background-color: var(--bg-panel);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--border-strong);
}
.empty-icon i { width: 32px; height: 32px; }
.empty-state h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}
.empty-state p {
    font-size: 0.9rem;
    max-width: 300px;
    line-height: 1.5;
}

.results-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}
.stat-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    padding: 1rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
}
.stat-card i { width: 24px; height: 24px; }
.stat-card.critical i { color: var(--critical); }
.stat-card.warning i { color: var(--warning); }
.stat-card.passing i { color: var(--passing); }

.stat-info {
    display: flex;
    flex-direction: column;
}
.stat-value {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-main);
}
.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Suggestion List */
.suggestions-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.suggestion-item {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    border-left: 4px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    box-shadow: var(--shadow-sm);
    animation: fadeIn 0.4s ease forwards;
}

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

.suggestion-item.critical { border-left-color: var(--critical); }
.suggestion-item.warning { border-left-color: var(--warning); }
.suggestion-item.info { border-left-color: var(--info); }
.suggestion-item.passing { border-left-color: var(--passing); }

.sugg-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}
.sugg-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--text-main);
}
.sugg-title i { width: 18px; height: 18px; }
.critical .sugg-title i { color: var(--critical); }
.warning .sugg-title i { color: var(--warning); }
.info .sugg-title i { color: var(--info); }
.passing .sugg-title i { color: var(--passing); }

.badge-wcag {
    background-color: var(--bg-panel);
    color: var(--text-muted);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    font-family: 'Fira Code', monospace;
}

.sugg-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.sugg-code {
    background-color: var(--bg-base);
    border: 1px solid var(--border);
    padding: 0.75rem;
    border-radius: 6px;
    font-family: 'Fira Code', monospace;
    font-size: 0.8rem;
    color: #000;
    overflow-x: auto;
}

/* History and Settings Lists */
.history-list {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.history-item {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    padding: 1.25rem;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s;
}
.history-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}
.history-info display {
    flex-direction: column;
}
.history-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}
.history-snippet {
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    color: var(--text-main);
    font-weight: 500;
}

/* Settings View */
.settings-panel .panel-body {
    padding: 2rem;
    background-color: var(--bg-surface);
}

.settings-group {
    margin-bottom: 2.5rem;
    max-width: 600px;
}
.settings-group h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}
.settings-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
    cursor: pointer;
}
.checkbox-label input[type="checkbox"] {
    margin-top: 0.2rem;
    width: 16px; height: 16px;
    accent-color: var(--primary);
}
.checkbox-text {
    font-size: 0.9rem;
    color: var(--text-main);
}
.checkbox-text strong {
    display: inline-block;
    width: 80px;
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.radio-label {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    background-color: var(--bg-panel);
    border: 1px solid var(--border);
    padding: 1.25rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}
.radio-label:has(input:checked) {
    border-color: var(--primary);
    background-color: var(--primary-light);
}
.radio-label input[type="radio"] {
    margin-top: 0.2rem;
    accent-color: var(--primary);
}
.radio-content {
    flex: 1;
}
.radio-content strong {
    display: block;
    margin-bottom: 0.25rem;
    color: var(--text-main);
}
.radio-content p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
}
.badge-success { background-color: var(--padding-bg); color: var(--passing); }
.badge-warning { background-color: var(--warning-bg); color: var(--warning); }

/* Scrollbar */
.custom-scrollbar::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
.custom-scrollbar::-webkit-scrollbar-track {
    background: transparent;
}
.custom-scrollbar::-webkit-scrollbar-thumb {
    background-color: var(--border-strong);
    border-radius: 10px;
}
.custom-scrollbar::-webkit-scrollbar-thumb:hover {
    background-color: var(--text-muted);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-main);
    color: var(--bg-surface);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 2000;
}
.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

@media (max-width: 1024px) {
    .auditor-grid {
        grid-template-columns: 1fr;
    }
}