/* COLLISION AI & NLP Lab Styling */
:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #111827;
    --bg-card: #172033;
    --bg-card-hover: #1e293b;
    --bg-input: #0f172a;
    --border-color: #2e384d;
    --border-highlight: #4338ca;
    
    --accent-indigo: #6366f1;
    --accent-purple: #8b5cf6;
    --accent-pink: #ec4899;
    --accent-cyan: #06b6d4;
    --accent-emerald: #10b981;
    --accent-amber: #f59e0b;
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --sidebar-width: 280px;
    --header-height: 70px;
}

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

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

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

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    z-index: 10;
}

.brand {
    padding: 24px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.brand-text h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.3rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #fff;
}

.badge-pill {
    font-size: 0.72rem;
    background: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
    border: 1px solid rgba(99, 102, 241, 0.3);
    padding: 2px 8px;
    border-radius: 20px;
    font-weight: 600;
}

.nav-menu {
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    width: 100%;
}

.nav-item:hover {
    background-color: var(--bg-card);
    color: var(--text-primary);
}

.nav-item.active {
    background: linear-gradient(90deg, rgba(99, 102, 241, 0.18), rgba(139, 92, 246, 0.1));
    border-color: rgba(99, 102, 241, 0.4);
    color: #ffffff;
    font-weight: 600;
}

.nav-icon {
    font-size: 1.15rem;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
    background: rgba(11, 15, 25, 0.4);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.stats-badge {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 0.78rem;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    color: var(--text-secondary);
}

.stat-row strong {
    color: var(--text-primary);
}

.text-success { color: var(--accent-emerald) !important; }
.text-info { color: var(--accent-cyan) !important; }
.text-purple { color: var(--accent-purple) !important; }
.text-warning { color: var(--accent-amber) !important; }

.btn-hf-hub {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, #4f46e5, #7c3aed);
    color: white;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 10px 14px;
    border-radius: 8px;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.btn-hf-hub:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(79, 70, 229, 0.45);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    background: radial-gradient(circle at 80% 10%, rgba(99, 102, 241, 0.08) 0%, transparent 50%);
}

.top-header {
    height: var(--header-height);
    border-bottom: 1px solid var(--border-color);
    padding: 0 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(8px);
    flex-shrink: 0;
}

.header-titles h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.35rem;
    font-weight: 700;
    color: #fff;
}

.header-titles p {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    background: rgba(16, 185, 129, 0.12);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--accent-emerald);
    box-shadow: 0 0 8px var(--accent-emerald);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.85); }
}

.content-scrollable {
    flex: 1;
    overflow-y: auto;
    padding: 24px 28px;
}

/* Tab Panels */
.tab-panel {
    display: none;
    animation: fadeIn 0.25s ease forwards;
}

.tab-panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Chat Layout */
.chat-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 20px;
    height: calc(100vh - var(--header-height) - 48px);
}

.chat-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.message {
    display: flex;
    gap: 12px;
    max-width: 88%;
}

.message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.msg-avatar {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.message.user .msg-avatar {
    background: var(--accent-indigo);
    color: white;
}

.msg-body {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px 16px;
}

.message.user .msg-body {
    background: #232d4b;
    border-color: #3b4b75;
}

.msg-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
    font-size: 0.78rem;
}

.msg-sender {
    font-weight: 600;
    color: var(--text-primary);
}

.msg-badge {
    font-size: 0.7rem;
    padding: 1px 6px;
    border-radius: 4px;
    font-weight: 600;
}

.badge-nlp {
    background: rgba(99, 102, 241, 0.2);
    color: #a5b4fc;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.badge-math {
    background: rgba(16, 185, 129, 0.2);
    color: #6ee7b7;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.msg-content p {
    font-size: 0.92rem;
    color: #e5e7eb;
    line-height: 1.55;
    white-space: pre-wrap;
}

.chat-quick-actions {
    padding: 10px 16px;
    background: rgba(15, 23, 42, 0.6);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 8px;
    overflow-x: auto;
}

.quick-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.btn-chip {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    color: var(--text-secondary);
    font-size: 0.76rem;
    padding: 4px 10px;
    white-space: nowrap;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-chip:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: var(--accent-indigo);
}

.chat-input-box {
    padding: 14px 16px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 10px;
}

.chat-input-box input {
    flex: 1;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 0.92rem;
    outline: none;
    transition: border-color 0.2s ease;
}

.chat-input-box input:focus {
    border-color: var(--accent-indigo);
}

.btn-send {
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
    color: white;
    border: none;
    border-radius: 8px;
    padding: 0 18px;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    transition: transform 0.15s ease, filter 0.15s ease;
}

.btn-send:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
}

/* Chat Inspector */
.chat-inspector {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow-y: auto;
}

.chat-inspector h3 {
    font-size: 0.95rem;
    font-family: 'Outfit', sans-serif;
    color: #fff;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.inspector-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.card-label {
    font-size: 0.74rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.route-badge {
    display: inline-block;
    font-size: 0.82rem;
    font-weight: 600;
    color: #a5b4fc;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    padding: 3px 8px;
    border-radius: 4px;
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag-chip {
    font-size: 0.75rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 2px 8px;
    border-radius: 4px;
}

.progress-bar-container {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.bar-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.progress-bar {
    height: 6px;
    background: var(--bg-input);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar .fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-indigo), var(--accent-purple));
    border-radius: 3px;
    transition: width 0.3s ease;
}

.metric-value {
    font-family: 'Fira Code', monospace;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-emerald);
}

/* Panel Card */
.panel-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 1080px;
    margin: 0 auto;
}

.panel-header h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.35rem;
    color: #fff;
    margin-bottom: 4px;
}

.panel-header p {
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

textarea, input[type="text"] {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 14px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.92rem;
    outline: none;
    resize: vertical;
}

textarea:focus, input[type="text"]:focus {
    border-color: var(--accent-indigo);
}

.actions-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
    color: white;
    border: none;
    border-radius: 8px;
    padding: 10px 18px;
    font-weight: 600;
    font-size: 0.88rem;
    cursor: pointer;
    transition: transform 0.15s ease, filter 0.15s ease;
}

.btn-primary:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 14px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: var(--accent-indigo);
}

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.res-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.res-card h3 {
    font-size: 0.95rem;
    font-family: 'Outfit', sans-serif;
    color: #fff;
}

.keyphrase-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.kp-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
}

.kp-item .kp-rank {
    font-weight: 700;
    color: var(--accent-indigo);
    font-family: 'Fira Code', monospace;
}

.kp-item .kp-text {
    font-weight: 500;
    color: var(--text-primary);
}

.score-bars-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.score-bar-row {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.score-bar-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.score-bar-bg {
    height: 6px;
    background: var(--bg-input);
    border-radius: 3px;
    overflow: hidden;
}

.score-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-indigo), var(--accent-pink));
    border-radius: 3px;
}

/* Topic Classification */
.top-prediction {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    gap: 10px;
}

.top-badge {
    font-family: 'Outfit', sans-serif;
    font-size: 1.6rem;
    font-weight: 800;
    color: #a5b4fc;
    letter-spacing: 0.05em;
}

.top-confidence {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.distribution-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 240px;
    overflow-y: auto;
}

/* Metrics Quad */
.metrics-quad {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.metric-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 18px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.metric-title {
    font-size: 0.78rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 600;
}

.metric-huge {
    font-family: 'Outfit', sans-serif;
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
}

.metric-desc {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

/* Proofreader */
.error-items-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.error-badge {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    color: #fca5a5;
    display: flex;
    justify-content: space-between;
}

.corrected-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-primary);
}

/* Context QA */
.qa-result-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-highlight);
    border-radius: 10px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.qa-answer-title {
    font-size: 0.82rem;
    font-weight: 700;
    color: #a5b4fc;
    text-transform: uppercase;
}

.qa-answer-text {
    font-size: 1.15rem;
    font-weight: 600;
    color: #fff;
}

.qa-confidence {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Solver */
.solver-result-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.solver-metric-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.solver-metric-card.result-highlight {
    border-color: var(--accent-emerald);
    background: rgba(16, 185, 129, 0.08);
}

.code-pill {
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    background: var(--bg-input);
    padding: 6px 10px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    color: #cbd5e1;
}

.solver-big-val {
    font-family: 'Fira Code', monospace;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--accent-emerald);
}

/* Python SDK tab */
.code-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
}

.code-header {
    background: var(--bg-input);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.btn-copy {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.76rem;
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-copy:hover {
    color: #fff;
    border-color: var(--accent-indigo);
}

pre {
    padding: 16px;
    overflow-x: auto;
}

code {
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    color: #cbd5e1;
    line-height: 1.6;
}

/* Responsive */
@media (max-width: 900px) {
    .app-container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: auto;
    }
    .chat-layout {
        grid-template-columns: 1fr;
    }
    .chat-inspector {
        display: none;
    }
    .results-grid, .metrics-quad, .solver-result-container {
        grid-template-columns: 1fr;
    }
}