/* =========================================================================
   STYLE SYSTEM - OBSIDIAN DARK THEME & GLASSMORPHISM
   ========================================================================= */

:root {
    /* Color Tokens - Curated HSL Palette */
    --bg-base: hsl(222, 25%, 8%);
    --bg-card: hsla(222, 20%, 12%, 0.7);
    --bg-card-hover: hsla(222, 20%, 15%, 0.8);
    --border-glow: hsla(230, 80%, 65%, 0.15);
    --border-glow-focus: hsla(230, 80%, 65%, 0.4);
    
    /* Neon Accents */
    --accent-indigo: hsl(235, 85%, 65%);
    --accent-indigo-glow: hsla(235, 85%, 65%, 0.35);
    --accent-violet: hsl(265, 85%, 65%);
    --accent-violet-glow: hsla(265, 85%, 65%, 0.25);
    --accent-amber: hsl(35, 95%, 55%);
    --accent-amber-glow: hsla(35, 95%, 55%, 0.25);
    --accent-mint: hsl(155, 85%, 50%);
    --accent-rose: hsl(345, 85%, 60%);
    
    /* Text Colors */
    --text-primary: hsl(210, 20%, 95%);
    --text-secondary: hsl(210, 10%, 75%);
    --text-muted: hsl(210, 10%, 55%);
    
    /* Layout & Shadows */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Fira Code', monospace;
    --border-radius-lg: 16px;
    --border-radius-md: 10px;
    --border-radius-sm: 6px;
    --shadow-premium: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Base resets & layout */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-base);
    background-image: 
        radial-gradient(at 10% 20%, hsla(235, 85%, 50%, 0.05) 0px, transparent 50%),
        radial-gradient(at 90% 80%, hsla(265, 85%, 50%, 0.05) 0px, transparent 50%);
    color: var(--text-primary);
    font-family: var(--font-body);
    min-height: 100vh;
    padding: 20px;
    overflow-x: hidden;
}

/* Glassmorphism utility */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glow);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-premium);
    transition: var(--transition-smooth);
}

.card:hover {
    border-color: hsla(230, 80%, 65%, 0.25);
    box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.6);
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* APP CONTAINER */
.app-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* APP HEADER */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 5px;
    border-bottom: 1px solid var(--border-glow);
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 2rem;
    color: var(--accent-indigo);
    text-shadow: 0 0 15px var(--accent-indigo-glow);
    animation: rotatePulse 4s infinite ease-in-out;
}

h1 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.accent-text {
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-violet));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* DEVICE STATUS */
.status-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    padding: 6px 14px;
    border-radius: 30px;
    color: var(--text-secondary);
    font-weight: 500;
}

.indicator {
    width: 8px;
    height: 8px;
    background-color: var(--accent-rose);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent-rose);
}

.status-badge.cuda-active .indicator {
    background-color: var(--accent-mint);
    box-shadow: 0 0 10px var(--accent-mint);
    animation: pulseGlow 1.5s infinite alternate;
}

.status-badge.cpu-active .indicator {
    background-color: var(--accent-amber);
    box-shadow: 0 0 10px var(--accent-amber);
    animation: pulseGlow 1.5s infinite alternate;
}

/* MAIN LAYOUT */
.main-layout {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 20px;
}

/* SIDEBAR CONTROLS */
.sidebar {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    height: fit-content;
}

h2 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-primary);
    border-left: 3px solid var(--accent-indigo);
    padding-left: 10px;
    margin-bottom: 4px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.group-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.help-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.35;
}

/* RADIO TOGGLE BUTTONS */
.radio-toggle {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: hsla(222, 20%, 6%, 0.5);
    border: 1px solid var(--border-glow);
    padding: 4px;
    border-radius: var(--border-radius-md);
}

.radio-toggle input[type="radio"] {
    display: none;
}

.toggle-btn {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 8px 4px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    text-align: center;
    transition: var(--transition-smooth);
}

.radio-toggle input[type="radio"]:checked + .toggle-btn {
    background: var(--accent-indigo);
    color: var(--text-primary);
    box-shadow: 0 0 12px var(--accent-indigo-glow);
}

/* RANGE SLIDERS */
.slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.slider-value {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent-indigo);
    font-weight: 600;
}

.styled-range {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: hsla(222, 20%, 6%, 0.8);
    border-radius: 3px;
    outline: none;
    border: 1px solid var(--border-glow);
}

.styled-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-indigo);
    cursor: pointer;
    box-shadow: 0 0 10px var(--accent-indigo-glow);
    border: 2px solid var(--text-primary);
    transition: var(--transition-smooth);
}

.styled-range::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 15px var(--accent-indigo);
}

.range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* HEAD CHECKBOX GRID */
.head-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.head-actions {
    display: flex;
    gap: 8px;
}

.text-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;
    text-transform: uppercase;
    transition: var(--transition-smooth);
}

.text-btn:hover {
    color: var(--accent-indigo);
}

.head-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
}

.head-check-container {
    position: relative;
    display: block;
}

.head-check-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.head-tile {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 32px;
    border: 1px solid var(--border-glow);
    border-radius: var(--border-radius-sm);
    background: hsla(222, 20%, 6%, 0.4);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    cursor: pointer;
    user-select: none;
    transition: var(--transition-smooth);
}

.head-check-container input:checked ~ .head-tile {
    border-color: var(--accent-violet);
    background: hsla(265, 85%, 65%, 0.15);
    color: var(--accent-violet);
    box-shadow: 0 0 8px var(--accent-violet-glow);
    font-weight: 600;
}

.head-check-container input:checked ~ .head-tile:hover {
    box-shadow: 0 0 12px var(--accent-violet);
}

.head-tile:hover {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

/* PLAYGROUND SAMPLING PARAMETERS */
.panel-divider {
    border-top: 1px solid var(--border-glow);
    padding-top: 20px;
    gap: 16px;
}

.control-subgroup {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-subgroup label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

/* WORKSPACE */
.workspace {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* TAB BAR */
.tab-container {
    display: flex;
    gap: 10px;
}

.tab-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    border-radius: 30px;
    color: var(--text-muted);
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 10px 22px;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-premium);
}

.tab-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-glow-focus);
}

.tab-btn.active {
    background: var(--accent-indigo);
    color: var(--text-primary);
    border-color: var(--accent-indigo);
    box-shadow: 0 0 15px var(--accent-indigo-glow);
}

/* VIEW PANELS */
.view-content {
    min-height: 480px;
    padding: 24px;
    position: relative;
}

.view-panel {
    display: none;
    flex-direction: column;
    gap: 20px;
    height: 100%;
}

.view-panel.active {
    display: flex;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-glow);
    padding-bottom: 12px;
}

.panel-header h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
}

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

.legend {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.gradient-bar {
    width: 120px;
    height: 10px;
    background: linear-gradient(90deg, hsla(265, 80%, 20%, 0.1), var(--accent-indigo), var(--accent-amber));
    border-radius: 5px;
    border: 1px solid var(--border-glow);
}

/* HEATMAP GRID */
.heatmap-axes-container {
    display: flex;
    margin-top: 15px;
    overflow: auto;
    padding-bottom: 10px;
}

.y-axis-labels {
    display: grid;
    gap: 2px;
    padding-top: 3px;
    padding-right: 12px;
    min-width: 80px;
    text-align: right;
}

.y-axis-labels div, .x-axis-labels div {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

.heatmap-grid-area {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.heatmap-grid {
    display: grid;
    gap: 2px;
    background: hsla(222, 20%, 6%, 0.5);
    border: 1px solid var(--border-glow);
    padding: 3px;
    border-radius: var(--border-radius-md);
    width: fit-content;
}

.heatmap-cell {
    aspect-ratio: 1 / 1;
    border-radius: 3px;
    cursor: pointer;
    transition: transform 0.15s ease-out;
}

.heatmap-cell:hover {
    transform: scale(1.15);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.4);
    z-index: 10;
}

.x-axis-labels {
    display: grid;
    gap: 2px;
    padding-left: 3px;
    padding-right: 3px;
    margin-top: 10px;
    height: 80px;
    width: fit-content;
}

.x-axis-labels div {
    width: 32px;
    text-align: left;
    transform: rotate(45deg);
    transform-origin: top left;
    margin-left: 16px;
    overflow: visible;
    text-overflow: unset;
    white-space: nowrap;
}

.heatmap-tooltip {
    text-align: center;
    background: hsla(222, 25%, 6%, 0.85);
    border: 1px solid var(--border-glow);
    border-radius: var(--border-radius-sm);
    padding: 10px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.heatmap-tooltip strong {
    color: var(--accent-amber);
}

/* CONNECTIONS VIEW */
.connections-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    height: auto;
    min-height: 380px;
    margin-top: 10px;
    position: relative;
    padding-bottom: 10px;
}

.tokens-column {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 6px;
    width: 140px;
    z-index: 10;
}

.token-node {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    padding: 6px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    border-radius: var(--border-radius-sm);
    text-align: center;
    cursor: pointer;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    flex-shrink: 0;
    min-height: 28px;
    transition: var(--transition-smooth);
}

.token-node:hover, .token-node.hovered {
    border-color: var(--accent-indigo);
    background: hsla(235, 85%, 65%, 0.12);
    color: var(--text-primary);
    box-shadow: 0 0 10px var(--accent-indigo-glow);
    transform: scale(1.05);
}

.token-node.dimmed {
    opacity: 0.35;
    border-color: transparent;
}

.svg-container {
    position: absolute;
    left: 140px;
    right: 140px;
    top: 0;
    bottom: 0;
    pointer-events: none;
}

svg path {
    fill: none;
    stroke-linecap: round;
    transition: stroke 0.2s ease, stroke-width 0.2s ease, opacity 0.2s ease;
}

/* CONSOLE PLAYGROUND */
.playground-console {
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.console-input-row {
    display: flex;
    gap: 14px;
}

.input-container {
    flex-grow: 1;
    position: relative;
}

.input-container input {
    width: 100%;
    background: hsla(222, 20%, 6%, 0.8);
    border: 1px solid var(--border-glow);
    border-radius: var(--border-radius-md);
    padding: 14px 20px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition-smooth);
}

.input-container input:focus {
    border-color: var(--accent-indigo);
    box-shadow: 0 0 12px var(--accent-indigo-glow);
}

.glowing-btn {
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-violet));
    color: var(--text-primary);
    border: none;
    border-radius: var(--border-radius-md);
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0 30px;
    cursor: pointer;
    box-shadow: 0 0 15px var(--accent-indigo-glow);
    transition: var(--transition-smooth);
}

.glowing-btn:hover {
    box-shadow: 0 0 22px var(--accent-indigo);
    transform: translateY(-1px);
}

.glowing-btn:active {
    transform: translateY(1px);
}

.presets-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.presets-label {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
}

.preset-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    border-radius: 30px;
    color: var(--text-secondary);
    font-size: 0.75rem;
    padding: 6px 14px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.preset-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-glow-focus);
    background: var(--bg-card-hover);
}

.console-log-box {
    border-top: 1px solid var(--border-glow);
    padding-top: 12px;
}

.console-log {
    background: hsla(222, 20%, 4%, 0.6);
    border: 1px solid var(--border-glow);
    border-radius: var(--border-radius-sm);
    padding: 10px 14px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-secondary);
    height: 70px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.console-log div {
    line-height: 1.4;
}

.console-log .log-success { color: var(--accent-mint); }
.console-log .log-warning { color: var(--accent-amber); }
.console-log .log-error { color: var(--accent-rose); }

/* D3.JS PROBABILITY TREE STYLES */
.d3-tree-wrapper {
    width: 100%;
    height: 400px;
    overflow: auto;
    background: hsla(222, 20%, 4%, 0.4);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-glow);
    position: relative;
}

#d3-tree-canvas {
    width: 100%;
    height: 100%;
    min-width: 600px;
}

.node circle {
    fill: var(--bg-card);
    stroke: var(--accent-indigo);
    stroke-width: 2.5px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.node.leaf circle {
    stroke: var(--accent-violet);
}

.node circle:hover {
    fill: var(--accent-indigo-glow);
    transform: scale(1.15);
}

.node text {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    fill: var(--text-secondary);
    font-weight: 500;
    pointer-events: none;
}

.node:hover text {
    fill: var(--text-primary);
    font-weight: 600;
}

.link {
    fill: none;
    stroke: var(--border-glow);
    stroke-opacity: 0.6;
    stroke-linecap: round;
    transition: var(--transition-smooth);
}

.link.high-probability {
    stroke: var(--accent-indigo);
    stroke-opacity: 0.85;
}

/* MULTIHEAD HEATMAP GRID OVERVIEW */
.multihead-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 16px;
    max-height: 480px;
    overflow-y: auto;
    padding-right: 5px;
}

.multihead-card {
    padding: 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    border-radius: var(--border-radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.multihead-card:hover {
    border-color: var(--accent-indigo);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.4);
}

.multihead-card.active-head {
    border-color: var(--accent-violet);
    box-shadow: 0 0 10px var(--accent-violet-glow);
    background: hsla(265, 85%, 65%, 0.05);
}

.multihead-title {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
}

.multihead-mini-grid {
    display: grid;
    gap: 1px;
    padding: 2px;
    background: rgba(0,0,0,0.3);
    border-radius: 4px;
}

.mini-cell {
    width: 6px;
    height: 6px;
    border-radius: 1px;
}

/* MATHEMATICAL DETAILS SIDE-OUT DRAWER */
.math-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 420px;
    background: var(--bg-card);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border-left: 1px solid var(--border-glow);
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.7);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    transform: translateX(105%);
    transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.math-drawer.open {
    transform: translateX(0);
}

.drawer-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-glow);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.drawer-header h3 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
}

.close-drawer-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.8rem;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.close-drawer-btn:hover {
    color: var(--accent-rose);
    transform: scale(1.1);
}

.drawer-body {
    padding: 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.math-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: hsla(222, 20%, 6%, 0.4);
    padding: 14px;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-glow);
}

.math-section h4 {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.math-formula {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-amber);
    background: rgba(0,0,0,0.3);
    padding: 10px;
    border-radius: var(--border-radius-sm);
    text-align: center;
}

.vector-block {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-secondary);
    max-height: 120px;
    overflow-y: auto;
}

.vector-block span {
    padding: 2px 6px;
    border-bottom: 1px dashed rgba(255,255,255,0.05);
}

/* ANIMATIONS */
@keyframes rotatePulse {
    0% { transform: scale(1) rotate(0deg); opacity: 0.8; }
    50% { transform: scale(1.1) rotate(180deg); opacity: 1; }
    100% { transform: scale(1) rotate(360deg); opacity: 0.8; }
}

@keyframes pulseGlow {
    from { transform: scale(0.9); opacity: 0.6; box-shadow: 0 0 4px currentColor; }
    to { transform: scale(1.1); opacity: 1; box-shadow: 0 0 12px currentColor; }
}

@keyframes flowPulse {
    from { opacity: 0.4; transform: translateX(-3px); }
    to { opacity: 1; transform: translateX(3px); }
}

/* RESPONSIVE BREAKPOINTS */
@media (max-width: 1100px) {
    .main-layout {
        grid-template-columns: 1fr;
    }
}