/* ==========================================================================
   LLM Infra Visualizer - Premium Design System (index.css)
   ========================================================================== */

/* Google Fonts Setup */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&family=Fira+Code:wght@400;500&display=swap');

:root {
    /* Color Palette - HSL Fine-tuned */
    --bg-darkest: #07090e;
    --bg-darker: #0d111c;
    --bg-card: rgba(17, 24, 39, 0.55);
    --bg-card-hover: rgba(26, 36, 57, 0.7);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-active: rgba(59, 130, 246, 0.4);
    
    --primary: #3b82f6;       /* Neon Cyan-Blue */
    --primary-glow: rgba(59, 130, 246, 0.35);
    --secondary: #8b5cf6;     /* Neon Violet */
    --secondary-glow: rgba(139, 92, 246, 0.35);
    
    --color-compute: #06b6d4;   /* Compute Cyan */
    --color-memory: #10b981;    /* Memory Emerald Green */
    --color-warn: #f97316;      /* Sunset Orange */
    --color-error: #ef4444;     /* Alert Red */
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    /* Layout & Spacing */
    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 6px;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Font Stacks */
    --font-outfit: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-inter: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Fira Code', monospace;
}

/* Base Reset & Styling */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

body {
    background-color: var(--bg-darkest);
    color: var(--text-primary);
    font-family: var(--font-inter);
    min-height: 100vh;
    padding: 2rem 1.5rem;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(59, 130, 246, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.06) 0%, transparent 45%);
}

/* Premium Typography Elements */
h1, h2, h3, h4 {
    font-family: var(--font-outfit);
    font-weight: 700;
    letter-spacing: -0.02em;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition-smooth);
}

a:hover {
    color: var(--secondary);
    text-shadow: 0 0 8px var(--secondary-glow);
}

/* Glassmorphism Containers */
.glass-panel {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: var(--transition-smooth);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.glass-panel:hover {
    border-color: rgba(255, 255, 255, 0.12);
    background: var(--bg-card-hover);
    box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.5);
}

/* Header & Banner styling */
header {
    max-width: 1400px;
    margin: 0 auto 2rem auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.header-title-area h1 {
    font-size: 2.25rem;
    background: linear-gradient(135deg, #ffffff 30%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(255,255,255,0.05);
}

.header-title-area p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 0.35rem;
}

/* Hardware Presets Segmented Control */
.preset-selector {
    display: flex;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    padding: 4px;
    border-radius: var(--radius-md);
    gap: 2px;
}

.preset-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-outfit);
    font-weight: 600;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-smooth);
    font-size: 0.9rem;
}

.preset-btn:hover {
    color: var(--text-primary);
}

.preset-btn.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

/* Sleek Language Selector glass styles */
.lang-selector {
    display: flex;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    padding: 4px;
    border-radius: var(--radius-md);
    gap: 2px;
}

.lang-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-outfit);
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-smooth);
    font-size: 0.9rem;
}

.lang-btn:hover {
    color: var(--text-primary);
}

.lang-btn.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

/* Main Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 420px 1fr;
    gap: 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
}

/* Control Panel Section */
.control-panel {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    height: fit-content;
}

.section-title {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-left: 3px solid var(--primary);
    padding-left: 0.5rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.label-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    font-weight: 500;
}

.label-title {
    color: var(--text-secondary);
}

.label-value {
    font-family: var(--font-mono);
    color: var(--primary);
    font-weight: 600;
}

/* Advanced Custom Sliders & Numeric Inputs */
.slider-row {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    outline: none;
    transition: var(--transition-smooth);
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--text-primary);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
    transition: var(--transition-smooth);
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--primary);
    box-shadow: 0 0 12px var(--primary);
    transform: scale(1.15);
}

input[type="number"].num-input {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: 0.35rem 0.5rem;
    border-radius: var(--radius-sm);
    width: 80px;
    text-align: right;
    outline: none;
    transition: var(--transition-smooth);
}

input[type="number"].num-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 8px var(--primary-glow);
}

/* Metric Display Layout */
.metrics-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.metric-card {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    position: relative;
    overflow: hidden;
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 3px;
    width: 100%;
    background: transparent;
}

.metric-card.compute::before {
    background: var(--color-compute);
}

.metric-card.memory::before {
    background: var(--color-memory);
}

.metric-card.crossover::before {
    background: var(--secondary);
}

.metric-card.caching::before {
    background: var(--color-warn);
}

.metric-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.metric-number {
    font-size: 1.6rem;
    font-family: var(--font-outfit);
    font-weight: 700;
    color: var(--text-primary);
}

.metric-unit {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-inter);
    margin-left: 2px;
}

/* Bottleneck Dynamic Alert Banner */
.bottleneck-banner {
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    font-size: 1.05rem;
    transition: var(--transition-smooth);
    border: 1px solid transparent;
}

.bottleneck-banner.compute-bound {
    background: rgba(6, 182, 212, 0.08);
    border-color: rgba(6, 182, 212, 0.3);
    color: var(--color-compute);
    box-shadow: inset 0 0 15px rgba(6, 182, 212, 0.05);
}

.bottleneck-banner.memory-bound {
    background: rgba(16, 185, 129, 0.08);
    border-color: rgba(16, 185, 129, 0.3);
    color: var(--color-memory);
    box-shadow: inset 0 0 15px rgba(16, 185, 129, 0.05);
}

.bottleneck-banner.comm-bottleneck {
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--color-error);
    box-shadow: inset 0 0 15px rgba(239, 68, 68, 0.05);
}

.bottleneck-led {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 0.5rem;
    position: relative;
}

.compute-bound .bottleneck-led {
    background-color: var(--color-compute);
    box-shadow: 0 0 10px var(--color-compute);
    animation: pulse-cyan 2s infinite;
}

.memory-bound .bottleneck-led {
    background-color: var(--color-memory);
    box-shadow: 0 0 10px var(--color-memory);
    animation: pulse-emerald 2s infinite;
}

.comm-bottleneck .bottleneck-led {
    background-color: var(--color-error);
    box-shadow: 0 0 10px var(--color-error);
    animation: pulse-red 2s infinite;
}

@keyframes pulse-cyan {
    0% { box-shadow: 0 0 0 0 rgba(6, 182, 212, 0.5); }
    70% { box-shadow: 0 0 0 8px rgba(6, 182, 212, 0); }
    100% { box-shadow: 0 0 0 0 rgba(6, 182, 212, 0); }
}

@keyframes pulse-emerald {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5); }
    70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
    100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

@keyframes pulse-red {
    0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.5); }
    70% { box-shadow: 0 0 0 8px rgba(239, 68, 68, 0); }
    100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

/* Visualization Panel Layout */
.visualization-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Chart Canvas Card wrapper */
.chart-container {
    height: 380px;
    position: relative;
    width: 100%;
}

/* Interactive Educational Segment */
.edu-section {
    grid-column: span 2;
    margin-top: 1.5rem;
}

.edu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.edu-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    transition: var(--transition-smooth);
}

.edu-card:hover {
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.edu-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.6rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.edu-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.5;
    margin-bottom: 0.85rem;
}

/* KaTeX Formula Display */
.formula-display {
    background: rgba(0, 0, 0, 0.3);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    font-size: 0.95rem;
    margin: 0.5rem 0;
    border-left: 2px solid var(--secondary);
    display: flex;
    justify-content: center;
}

.author-quote {
    font-style: italic;
    font-size: 0.82rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: 0.5rem;
    margin-top: 0.5rem;
}

/* Footer Section */
footer {
    max-width: 1400px;
    margin: 3rem auto 0 auto;
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.82rem;
}

/* Responsive Customization */
@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    .edu-section {
        grid-column: span 1;
    }
}

@media (max-width: 640px) {
    body {
        padding: 1rem;
    }
    header {
        flex-direction: column;
        align-items: flex-start;
    }
    .edu-grid {
        grid-template-columns: 1fr;
    }
    .chart-container {
        height: 280px;
    }
}

/* ==========================================================================
   CHATBOT UI STYLES - Premium Glassmorphic Theme
   ========================================================================== */

.chatbot-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1000;
    font-family: var(--font-inter);
}

/* Floating Trigger Button */
.chat-trigger-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 24px var(--secondary-glow), 0 0 0 1px rgba(255, 255, 255, 0.1);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
    position: relative;
}

.chat-trigger-btn:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 12px 30px rgba(139, 92, 246, 0.5), 0 0 15px rgba(59, 130, 246, 0.4);
}

.chat-trigger-btn:active {
    transform: translateY(1px) scale(0.95);
}

.chat-trigger-icon {
    font-size: 28px;
    line-height: 1;
    transition: var(--transition-smooth);
}

.chat-trigger-btn:hover .chat-trigger-icon {
    transform: rotate(10deg);
}

.chat-trigger-badge {
    position: absolute;
    top: -2px;
    right: -2px;
    background-color: var(--color-error);
    color: white;
    font-size: 11px;
    font-weight: 700;
    border-radius: 10px;
    padding: 2px 6px;
    border: 1.5px solid var(--bg-darkest);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    animation: badgePulse 2s infinite;
}

@keyframes badgePulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.15); }
    100% { transform: scale(1); }
}

/* Chat Dialog Window */
.chat-window {
    position: absolute;
    bottom: 76px;
    right: 0;
    width: 420px;
    height: 620px;
    background: rgba(13, 17, 28, 0.88);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
    transform-origin: bottom right;
}

.chat-window.hidden {
    opacity: 0;
    transform: scale(0.8) translateY(40px);
    pointer-events: none;
}

/* Chat Header */
.chat-header {
    background: rgba(26, 36, 57, 0.65);
    padding: 14px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

.chat-header-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.chat-avatar {
    font-size: 24px;
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(139, 92, 246, 0.2));
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-header-info h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

.chat-status {
    font-size: 11px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 5px;
    margin-top: 2px;
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--color-memory);
    box-shadow: 0 0 8px var(--color-memory);
    display: inline-block;
}

.chat-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.chat-action-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 16px;
    cursor: pointer;
    width: 30px;
    height: 30px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.chat-action-btn:hover {
    background-color: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

/* Collapsible Settings Panel */
.chat-settings-panel {
    background: rgba(17, 24, 39, 0.95);
    border-bottom: 1px solid var(--border-color);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1), padding 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
    overflow: hidden;
}

.chat-settings-panel.collapsed {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    border-bottom: none;
    opacity: 0;
    pointer-events: none;
}

.settings-title {
    font-size: 12px;
    font-weight: 700;
    color: var(--secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.settings-note {
    font-size: 11px;
    line-height: 1.45;
    color: var(--text-secondary);
    background: rgba(6, 182, 212, 0.08);
    border: 1px solid rgba(6, 182, 212, 0.18);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
}

.settings-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.settings-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.settings-field label {
    font-size: 11px;
    color: var(--text-secondary);
}

.settings-field input {
    background: rgba(7, 9, 14, 0.6);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-family: var(--font-mono);
    outline: none;
    transition: var(--transition-smooth);
}

.settings-field input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 8px var(--primary-glow);
}

.settings-save-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    color: white;
    font-size: 12px;
    font-weight: 600;
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.settings-save-btn:hover {
    opacity: 0.9;
    box-shadow: 0 2px 8px var(--secondary-glow);
}

/* Chat Body (Messages List) */
.chat-body {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    scroll-behavior: smooth;
}

/* Scrollbar styling for chat body */
.chat-body::-webkit-scrollbar {
    width: 6px;
}
.chat-body::-webkit-scrollbar-track {
    background: transparent;
}
.chat-body::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
}
.chat-body::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* Message Bubble Styles */
.chat-message {
    max-width: 85%;
    padding: 12px 14px;
    border-radius: var(--radius-lg);
    font-size: 13.5px;
    line-height: 1.5;
    word-wrap: break-word;
    position: relative;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* AI message (Reiner) */
.chat-message.ai-message {
    align-self: flex-start;
    background: rgba(26, 36, 57, 0.45);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--secondary);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
}

/* User message */
.chat-message.user-message {
    align-self: flex-end;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(139, 92, 246, 0.1));
    border: 1px solid rgba(139, 92, 246, 0.25);
    border-right: 3px solid var(--primary);
    color: var(--text-primary);
    border-bottom-right-radius: 4px;
}

/* Message Typings & Styles inside Bubble */
.chat-message p {
    margin-bottom: 8px;
}
.chat-message p:last-child {
    margin-bottom: 0;
}
.chat-message ul, .chat-message ol {
    margin-left: 18px;
    margin-bottom: 8px;
}
.chat-message ul:last-child, .chat-message ol:last-child {
    margin-bottom: 0;
}
.chat-message li {
    margin-bottom: 4px;
}
.chat-message code {
    font-family: var(--font-mono);
    background-color: rgba(7, 9, 14, 0.6);
    padding: 2px 5px;
    border-radius: 3px;
    font-size: 12px;
}
.chat-message pre {
    background-color: rgba(7, 9, 14, 0.75);
    padding: 10px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin-bottom: 8px;
    border: 1px solid var(--border-color);
}
.chat-message pre code {
    background-color: transparent;
    padding: 0;
    border-radius: 0;
    font-size: 11.5px;
}

.chat-message strong {
    color: var(--primary);
}

.demo-mode-label {
    display: inline-block;
    margin-bottom: 6px;
    padding: 2px 7px;
    border-radius: 999px;
    background: rgba(245, 158, 11, 0.14);
    border: 1px solid rgba(245, 158, 11, 0.28);
    color: #fbbf24;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

/* AI Quotations inside Bubble */
.chat-message .author-quote {
    background: rgba(139, 92, 246, 0.05);
    border-left: 2px solid var(--secondary);
    padding: 6px 10px;
    margin: 8px 0;
    font-style: italic;
    font-size: 12.5px;
    color: var(--text-secondary);
}

/* Math formula display inside Bubble */
.chat-message .katex-display {
    margin: 10px 0;
    padding: 6px 0;
    overflow-x: auto;
}

/* Typing Indicator Animation */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 6px;
}

.typing-dot {
    width: 6px;
    height: 6px;
    background-color: var(--text-secondary);
    border-radius: 50%;
    animation: typingPulse 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typingPulse {
    0%, 100% { transform: translateY(0); opacity: 0.4; }
    50% { transform: translateY(-4px); opacity: 1; }
}

/* Active Tool Notification */
.chat-tool-alert {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-left: 4px solid var(--color-memory);
    color: #a7f3d0;
    padding: 10px 14px;
    font-size: 12px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 16px 8px 16px;
    border-radius: var(--radius-sm);
    animation: slideDown 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.chat-tool-alert.hidden {
    display: none !important;
}

.tool-spinner {
    width: 14px;
    height: 14px;
    border: 2px solid rgba(16, 185, 129, 0.3);
    border-top-color: var(--color-memory);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: inline-block;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

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

/* Chat Suggestions Chips */
.chat-suggestions {
    display: flex;
    gap: 8px;
    padding: 8px 16px 12px 16px;
    overflow-x: auto;
    flex-wrap: nowrap;
    scrollbar-width: none; /* Hide scrollbar for clean chip appearance */
}
.chat-suggestions::-webkit-scrollbar {
    display: none;
}

.suggestion-chip {
    background: rgba(26, 36, 57, 0.5);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition-smooth);
}

.suggestion-chip:hover {
    border-color: var(--primary);
    color: var(--text-primary);
    background: rgba(59, 130, 246, 0.08);
}

/* Chat Footer Input Area */
.chat-footer {
    padding: 12px 16px;
    background: rgba(20, 28, 45, 0.8);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.chat-footer textarea {
    flex: 1;
    background: rgba(7, 9, 14, 0.8);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: 10px 12px;
    font-size: 13px;
    outline: none;
    resize: none;
    max-height: 80px;
    transition: var(--transition-smooth);
    font-family: inherit;
}

.chat-footer textarea:focus {
    border-color: var(--secondary);
    box-shadow: 0 0 8px var(--secondary-glow);
}

.chat-footer button {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    color: white;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
    flex-shrink: 0;
}

.chat-footer button:hover {
    box-shadow: 0 0 12px var(--secondary-glow);
    transform: scale(1.05);
}

.chat-footer button:active {
    transform: scale(0.95);
}

/* Responsive adjustment for small screens */
@media (max-width: 480px) {
    .chat-window {
        width: calc(100vw - 32px);
        height: calc(100vh - 120px);
        bottom: 76px;
        right: -8px;
    }
}

/* ==========================================================================
   Dynamic Rack Topology Visualizer Styling
   ========================================================================== */
.topology-container {
    width: 100%;
    background: rgba(5, 7, 12, 0.4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.6);
}

.topo-svg {
    width: 100%;
    height: auto;
    max-height: 260px;
}

/* Three View Switcher displaying logic */
.topo-svg #topo-view-single,
.topo-svg #topo-view-multi {
    display: none;
}

.topo-svg.topo-mode-single #topo-view-single {
    display: block;
}
.topo-svg.topo-mode-single #topo-view-dual,
.topo-svg.topo-mode-single #topo-view-multi {
    display: none;
}

.topo-svg.topo-mode-dual #topo-view-dual {
    display: block;
}
.topo-svg.topo-mode-dual #topo-view-single,
.topo-svg.topo-mode-dual #topo-view-multi {
    display: none;
}

.topo-svg.topo-mode-multi #topo-view-multi {
    display: block;
}
.topo-svg.topo-mode-multi #topo-view-dual,
.topo-svg.topo-mode-multi #topo-view-single {
    display: none;
}

/* GPU Node Styles */
.topo-gpu .gpu-rect {
    fill: rgba(17, 24, 39, 0.8);
    stroke: rgba(139, 92, 246, 0.4);
    stroke-width: 1.5;
    transition: var(--transition-smooth);
}

/* GPU Pulsing Styles based on LLM Architecture */
/* Dense Model: Synchronized Cyan Pulsing (Lockstep TP/PP) */
.topo-arch-dense .topo-gpu .gpu-rect {
    animation: gpu-pulse-dense 1.8s infinite ease-in-out;
}

/* MoE Model: Staggered/Alternating Purple Pulsing (Sparse Expert Dispatching) */
.topo-arch-moe .topo-gpu:nth-of-type(4n) .gpu-rect {
    animation: gpu-pulse-moe 2.4s infinite ease-in-out;
    animation-delay: 0s;
}
.topo-arch-moe .topo-gpu:nth-of-type(4n+1) .gpu-rect {
    animation: gpu-pulse-moe 2.4s infinite ease-in-out;
    animation-delay: 0.6s;
}
.topo-arch-moe .topo-gpu:nth-of-type(4n+2) .gpu-rect {
    animation: gpu-pulse-moe 2.4s infinite ease-in-out;
    animation-delay: 1.2s;
}
.topo-arch-moe .topo-gpu:nth-of-type(4n+3) .gpu-rect {
    animation: gpu-pulse-moe 2.4s infinite ease-in-out;
    animation-delay: 1.8s;
}

@keyframes gpu-pulse-dense {
    0%, 100% {
        stroke: rgba(6, 182, 212, 0.3);
        fill: rgba(17, 24, 39, 0.8);
    }
    50% {
        stroke: #06b6d4;
        fill: rgba(6, 182, 212, 0.15);
        filter: drop-shadow(0 0 6px rgba(6, 182, 212, 0.5));
    }
}

@keyframes gpu-pulse-moe {
    0%, 100% {
        stroke: rgba(168, 85, 247, 0.3);
        fill: rgba(17, 24, 39, 0.8);
    }
    50% {
        stroke: #a855f7;
        fill: rgba(168, 85, 247, 0.15);
        filter: drop-shadow(0 0 6px rgba(168, 85, 247, 0.5));
    }
}

.topo-gpu:hover .gpu-rect {
    stroke: var(--primary);
    fill: rgba(59, 130, 246, 0.15);
    filter: drop-shadow(0 0 8px var(--primary-glow)) !important;
    cursor: pointer;
    animation: none !important; /* Suspend pulsing on hover */
}

.topo-gpu .gpu-txt {
    fill: var(--text-primary);
    font-family: var(--font-outfit);
    font-size: 11px;
    font-weight: 700;
    text-anchor: middle;
}

/* Inner Rack NVLink Bus (Scale-up) */
.topo-nvlink {
    stroke: #06b6d4;
    stroke-opacity: 0.6;
    animation: nvlink-pulse 2s infinite ease-in-out;
}

@keyframes nvlink-pulse {
    0%, 100% { stroke-opacity: 0.3; stroke-width: 1.5; }
    50% { stroke-opacity: 0.8; stroke-width: 2.5; filter: drop-shadow(0 0 3px rgba(6, 182, 212, 0.5)); }
}

/* High Speed Backplane NVLink Bus for Single-Rack Superpod */
.topo-nvlink-bus {
    stroke: var(--primary);
    stroke-opacity: 0.4;
    filter: drop-shadow(0 0 4px var(--primary-glow));
}

.topo-nvlink-bus-flow {
    stroke: #06b6d4;
    animation: nvlink-bus-flow-anim 0.8s linear infinite;
    filter: drop-shadow(0 0 6px rgba(6, 182, 212, 0.7));
}

@keyframes nvlink-bus-flow-anim {
    to {
        stroke-dashoffset: -25;
    }
}

/* Multi-Rack Scale-out Links (stalled ethernet cables) */
.topo-multi-link {
    fill: none;
    stroke-linecap: round;
    transition: stroke var(--transition-smooth), filter var(--transition-smooth);
}

.topo-multi-link.link-safe {
    stroke: #06b6d4;
    filter: drop-shadow(0 0 4px rgba(6, 182, 212, 0.5));
    stroke-dasharray: 6, 6;
    animation: link-flow-safe 1.2s linear infinite;
}

.topo-multi-link.link-warning {
    stroke: #f59e0b;
    filter: drop-shadow(0 0 4px rgba(245, 158, 11, 0.5));
    stroke-dasharray: 6, 12;
    animation: link-flow-warning 3s linear infinite;
}

.topo-multi-link.link-collapse {
    stroke: #ef4444;
    filter: drop-shadow(0 0 6px rgba(239, 68, 68, 0.7));
    stroke-dasharray: 4, 16;
    animation: link-flow-collapse 3s linear infinite, link-flash-red 1s ease-in-out infinite;
}

/* Cross-Rack Scale-out Links with dynamic classes */
.topo-link {
    fill: none;
    stroke-width: 4;
    stroke-linecap: round;
    transition: stroke 0.5s ease, filter 0.5s ease;
}

/* Safe status (Cyan / Green Flow) */
.topo-link.link-safe {
    stroke: #06b6d4;
    filter: drop-shadow(0 0 6px rgba(6, 182, 212, 0.6));
    stroke-dasharray: 12, 12;
    animation: link-flow-safe 1s linear infinite;
}

@keyframes link-flow-safe {
    to {
        stroke-dashoffset: -24;
    }
}

/* Warning status (Yellow Flow) */
.topo-link.link-warning {
    stroke: #f59e0b;
    filter: drop-shadow(0 0 6px rgba(245, 158, 11, 0.6));
    stroke-dasharray: 12, 24;
    animation: link-flow-warning 3s linear infinite;
}

@keyframes link-flow-warning {
    to {
        stroke-dashoffset: -36;
    }
}

/* Collapse status (Red / Stalled Flow) */
.topo-link.link-collapse {
    stroke: #ef4444;
    filter: drop-shadow(0 0 8px rgba(239, 68, 68, 0.8));
    stroke-dasharray: 8, 32;
    animation: link-flow-collapse 3s linear infinite, link-flash-red 1s ease-in-out infinite;
}

/* TOR SWITCH rect Dynamic Glow Styles */
#topo-switch-rect {
    transition: stroke var(--transition-smooth), filter var(--transition-smooth), stroke-width var(--transition-smooth);
}
#topo-switch-rect.switch-safe {
    stroke: #06b6d4;
    filter: drop-shadow(0 0 5px rgba(6, 182, 212, 0.4));
    animation: switch-glow-safe 2s infinite ease-in-out;
}
#topo-switch-rect.switch-warning {
    stroke: #f59e0b;
    filter: drop-shadow(0 0 5px rgba(245, 158, 11, 0.4));
    animation: switch-glow-warning 2s infinite ease-in-out;
}
#topo-switch-rect.switch-collapse {
    stroke: #ef4444;
    filter: drop-shadow(0 0 10px rgba(239, 68, 68, 0.9));
    animation: switch-glow-collapse 1s infinite ease-in-out;
}

@keyframes switch-glow-safe {
    0%, 100% { stroke-opacity: 0.6; filter: drop-shadow(0 0 2px rgba(6, 182, 212, 0.3)); }
    50% { stroke-opacity: 1.0; filter: drop-shadow(0 0 6px rgba(6, 182, 212, 0.6)); }
}
@keyframes switch-glow-warning {
    0%, 100% { stroke-opacity: 0.6; filter: drop-shadow(0 0 2px rgba(245, 158, 11, 0.3)); }
    50% { stroke-opacity: 1.0; filter: drop-shadow(0 0 6px rgba(245, 158, 11, 0.6)); }
}
@keyframes switch-glow-collapse {
    0%, 100% { stroke-opacity: 0.3; stroke-width: 1.5; filter: drop-shadow(0 0 3px rgba(239, 68, 68, 0.3)); }
    50% { stroke-opacity: 1.0; stroke-width: 2.5; filter: drop-shadow(0 0 14px rgba(239, 68, 68, 0.95)); }
}

@keyframes link-flow-collapse {
    to {
        stroke-dashoffset: -48;
    }
}

@keyframes link-flash-red {
    0%, 100% { stroke-opacity: 0.4; filter: drop-shadow(0 0 3px rgba(239, 68, 68, 0.3)); }
    50% { stroke-opacity: 1.0; filter: drop-shadow(0 0 10px rgba(239, 68, 68, 0.9)); }
}

/* Status Badge Over link */
.status-badge-bg {
    fill: rgba(17, 24, 39, 0.85);
    stroke: rgba(255, 255, 255, 0.1);
    stroke-width: 1;
    transition: var(--transition-smooth);
}

.status-badge-bg.badge-safe {
    stroke: rgba(6, 182, 212, 0.4);
}

.status-badge-bg.badge-warning {
    stroke: rgba(245, 158, 11, 0.4);
}

.status-badge-bg.badge-collapse {
    stroke: rgba(239, 68, 68, 0.6);
}

.status-badge-txt {
    fill: var(--text-primary);
    font-family: var(--font-outfit);
    font-size: 10px;
    font-weight: 700;
    text-anchor: middle;
    letter-spacing: 0.5px;
}

/* ==========================================================================
   KV Cache Storage & Offload Economics Calculator
   ========================================================================== */
.decision-badge {
    background: rgba(139, 92, 246, 0.08);
    border: 1px dashed rgba(139, 92, 246, 0.3);
    border-radius: var(--radius-sm);
    padding: 0.6rem 1rem;
    margin-bottom: 1.25rem;
    font-size: 0.85rem;
    color: var(--text-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.05);
}

.decision-badge strong {
    color: var(--color-memory);
    font-family: var(--font-outfit);
    font-weight: 800;
    letter-spacing: 0.05em;
    filter: drop-shadow(0 0 8px rgba(245, 158, 11, 0.5));
}

.offload-grid {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.offload-card {
    background: rgba(13, 17, 28, 0.4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.offload-card:hover {
    border-color: rgba(255, 255, 255, 0.08);
    background: rgba(13, 17, 28, 0.6);
}

/* Active Highlight Style for the cheapest storage choice */
.offload-card.active-best {
    border-color: rgba(16, 185, 129, 0.5);
    background: rgba(16, 185, 129, 0.03);
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.15);
    animation: active-border-glow 3s infinite ease-in-out;
}

@keyframes active-border-glow {
    0%, 100% { border-color: rgba(16, 185, 129, 0.4); box-shadow: 0 0 10px rgba(16, 185, 129, 0.08); }
    50% { border-color: rgba(16, 185, 129, 0.8); box-shadow: 0 0 20px rgba(16, 185, 129, 0.25); }
}

.offload-card.active-best .offload-name {
    color: #10b981;
    font-weight: 700;
}

.offload-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.4rem;
}

.offload-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.offload-cost {
    font-family: var(--font-outfit);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--secondary);
}

.offload-card.active-best .offload-cost {
    color: #10b981;
}

/* Dual-color dynamic bar container */
.cost-bar-container {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 4px;
    margin-bottom: 0.4rem;
    display: flex;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.02);
}

.cost-bar-fill {
    height: 100%;
    transition: width 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Red: computation / recompute latency / network bandwidth blocks */
.cost-bar-fill.bar-retrieve {
    background: linear-gradient(90deg, #ef4444, #ec4899);
}

/* Yellow: memory storage capacity hold cost */
.cost-bar-fill.bar-hold {
    background: linear-gradient(90deg, #f59e0b, #eab308);
}

.offload-details {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
}