/* ==========================================================================
   RelayChain Style Sheets - Core Aesthetics
   A sleek, modern, glassmorphic neon design featuring responsive layouts,
   interactive micro-animations, and dynamic feedback elements.
   ========================================================================== */

:root {
    /* Color Palette - HSL Tailored Neon & Slate Themes */
    --bg-dark: #0a0d14;
    --bg-card: rgba(18, 25, 41, 0.7);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(52, 211, 153, 0.15);
    
    --primary: #10b981; /* Neon Emerald */
    --primary-rgb: 16, 185, 129;
    --primary-glow: rgba(16, 185, 129, 0.4);
    
    --secondary: #06b6d4; /* Neon Cyan */
    --secondary-rgb: 6, 182, 212;
    --secondary-glow: rgba(6, 182, 212, 0.4);
    
    --accent: #f59e0b; /* Neon Amber */
    --accent-rgb: 245, 158, 11;
    --accent-glow: rgba(245, 158, 11, 0.4);

    --danger: #ef4444;
    --danger-glow: rgba(239, 68, 68, 0.4);
    
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --font-family-body: 'Inter', sans-serif;
    --font-family-header: 'Orbitron', sans-serif;
    
    --transition-speed: 0.3s;
    --border-radius: 16px;
    --glass-blur: 16px;
}

/* Reset & Scrollbar Styling */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-family-body);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Custom Scrollbar for sleek aesthetic */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-glow);
}

/* Glassmorphism Panel Utility */
.glass-panel {
    background: var(--bg-card);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}
.glass-panel:hover {
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
}

/* Layout Framework */
.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    min-height: 100vh;
}

/* Header & Stat Cards */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.brand-section {
    position: relative;
}
.logo-glow {
    position: absolute;
    width: 60px;
    height: 60px;
    background: radial-gradient(circle, var(--primary-glow) 0%, rgba(0,0,0,0) 70%);
    top: -10px;
    left: -10px;
    z-index: 0;
    filter: blur(5px);
}
.brand-info h1 {
    font-family: var(--font-family-header);
    font-size: 2.2rem;
    font-weight: 900;
    letter-spacing: 2px;
    z-index: 1;
    position: relative;
    text-transform: uppercase;
    background: linear-gradient(135deg, #ffffff 40%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.brand-info h1 span {
    font-weight: 500;
    color: var(--secondary);
    -webkit-text-fill-color: initial;
}
.brand-info .tagline {
    font-size: 0.85rem;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.stats-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
.stat-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.25rem;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    min-width: 140px;
}
.stat-num {
    font-family: var(--font-family-header);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
    text-shadow: 0 0 8px var(--primary-glow);
}
.stat-lbl {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Nav Tab System */
.app-nav {
    display: flex;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    border-radius: 12px;
    width: fit-content;
}
.nav-tab {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-muted);
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    transition: color var(--transition-speed), background var(--transition-speed), box-shadow var(--transition-speed);
}
.nav-icon {
    width: 18px;
    height: 18px;
}
.nav-tab:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}
.nav-tab.active {
    color: #ffffff;
    background: var(--primary);
    box-shadow: 0 0 15px var(--primary-glow);
}
.nav-tab[data-tab="tab-spark"].active {
    background: var(--secondary);
    box-shadow: 0 0 15px var(--secondary-glow);
}
.nav-tab[data-tab="tab-contagion"].active {
    background: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow);
}

/* Section Styling */
.app-content {
    flex-grow: 1;
}
.tab-pane {
    display: none;
    animation: fadeIn 0.4s ease-out forwards;
}
.tab-pane.active {
    display: block;
}

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

.section-header {
    margin-bottom: 1.5rem;
}
.section-header h2 {
    font-family: var(--font-family-header);
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.section-header p {
    color: var(--text-muted);
    font-size: 0.95rem;
    max-width: 900px;
}

/* Filters */
.board-filters {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}
.filter-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-speed);
}
.filter-btn:hover {
    color: var(--text-main);
    border-color: rgba(255, 255, 255, 0.15);
}
.filter-btn.active {
    background: rgba(255, 255, 255, 0.1);
    color: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.2);
}

/* Module 1: The Chain Board & Flowcards */
.cascade-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
    gap: 1.5rem;
}

/* Flowcard UI */
.flowcard {
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 380px;
}

.flowcard-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.25rem 0.6rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}
.flowcard-badge.food { background: rgba(16, 185, 129, 0.15); color: var(--primary); border: 1px solid var(--primary); }
.flowcard-badge.emergency { background: rgba(245, 158, 11, 0.15); color: var(--accent); border: 1px solid var(--accent); }
.flowcard-badge.community { background: rgba(6, 182, 212, 0.15); color: var(--secondary); border: 1px solid var(--secondary); }

.flowcard h3 {
    font-family: var(--font-family-body);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    max-width: 75%;
}

.flowcard-desc {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
    height: 40px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

/* Flowchart Visual in Card */
.flowcard-viz-container {
    flex-grow: 1;
    position: relative;
    background: rgba(0, 0, 0, 0.25);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.03);
    margin-bottom: 1.25rem;
    overflow: hidden;
}
.flowcard-svg {
    width: 100%;
    height: 160px;
}

/* SVG Flow Styling */
.flow-line {
    stroke-width: 2.5;
    fill: none;
    transition: stroke var(--transition-speed);
}
.flow-line.inactive {
    stroke: rgba(255, 255, 255, 0.08);
}
.flow-line.pulse {
    stroke-dasharray: 8, 8;
    animation: flowPulse 25s linear infinite;
}
.flow-line.active-solid {
    stroke: var(--primary);
    filter: drop-shadow(0 0 3px var(--primary-glow));
}
.flow-line.active-cyan {
    stroke: var(--secondary);
    filter: drop-shadow(0 0 3px var(--secondary-glow));
}
.flow-line.active-amber {
    stroke: var(--accent);
    filter: drop-shadow(0 0 3px var(--accent-glow));
}

@keyframes flowPulse {
    to { stroke-dashoffset: -1000; }
}

.flow-node-circle {
    cursor: pointer;
    transition: transform 0.2s ease, fill 0.3s;
}
.flow-node-circle:hover {
    transform: scale(1.15);
    transform-origin: center;
}

.flowcard-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
    margin-top: auto;
}

.flow-info-stat {
    display: flex;
    flex-direction: column;
}
.flow-info-stat .lbl {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
}
.flow-info-stat .val {
    font-family: var(--font-family-header);
    font-size: 1.1rem;
    font-weight: 700;
    color: #ffffff;
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-danger {
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    border: none;
    font-family: var(--font-family-body);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all var(--transition-speed);
}
.btn-primary {
    background: var(--primary);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}
.btn-primary:hover {
    background: #059669;
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.4);
    transform: translateY(-1px);
}
.btn-primary:disabled {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    box-shadow: none;
    cursor: not-allowed;
    transform: none;
}
.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-main);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.25);
}
.btn-danger {
    background: var(--danger);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.2);
}
.btn-danger:hover {
    background: #dc2626;
    box-shadow: 0 4px 20px rgba(239, 68, 68, 0.4);
    transform: translateY(-1px);
}

.btn-icon {
    width: 16px;
    height: 16px;
}

/* Module 2: Spark Generator UI */
.spark-layout {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 1.5rem;
    align-items: stretch;
}

.panel-header {
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}
.panel-header h3 {
    font-family: var(--font-family-header);
    font-size: 1.3rem;
    color: #ffffff;
    margin-bottom: 0.25rem;
}
.panel-header p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.25rem;
}
.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-main);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.toggle-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    background: rgba(0, 0, 0, 0.2);
    padding: 0.3rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}
.toggle-buttons input[type="radio"] {
    display: none;
}
.toggle-label {
    text-align: center;
    padding: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-muted);
    transition: all var(--transition-speed);
}
.toggle-buttons input[type="radio"]:checked + .toggle-label {
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}
#type-offer:checked + .toggle-label {
    color: var(--primary);
    border-left: 2px solid var(--primary);
}
#type-need:checked + .toggle-label {
    color: var(--accent);
    border-left: 2px solid var(--accent);
}

.form-group input[type="text"],
.form-group select,
.form-group textarea {
    width: 100%;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    border-radius: 8px;
    color: #ffffff;
    font-family: var(--font-family-body);
    font-size: 0.9rem;
    transition: all var(--transition-speed);
}
.form-group input[type="text"]:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 10px var(--secondary-glow);
}

/* Match Visualizer Box */
.match-flow-viz {
    height: 250px;
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.03);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.flow-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    padding: 2rem;
    max-width: 320px;
}
.placeholder-icon {
    width: 48px;
    height: 48px;
    color: rgba(255, 255, 255, 0.05);
    animation: pulseSlow 3s ease-in-out infinite;
}

@keyframes pulseSlow {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.8; }
}

/* Impact Dashboard */
.impact-card {
    background: radial-gradient(circle at top left, rgba(6, 182, 212, 0.05) 0%, rgba(0,0,0,0) 70%);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 12px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    animation: slideUp 0.3s ease-out forwards;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.impact-card h4 {
    font-family: var(--font-family-header);
    color: var(--secondary);
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.impact-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}
.impact-metrics .metric {
    display: flex;
    flex-direction: column;
    align-items: center;
}
.impact-metrics .m-val {
    font-family: var(--font-family-header);
    font-size: 1.4rem;
    font-weight: 700;
    color: #ffffff;
}
.impact-metrics .m-lbl {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: center;
}
#impact-steps { color: var(--secondary); }
#impact-people { color: var(--primary); }
#impact-resilience { color: var(--accent); }

/* Module 3: Contagion Sandbox UI */
.contagion-layout {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 1.5rem;
}

.control-groups {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.control-card {
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: 10px;
}
.control-card .lbl-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}
.control-card label {
    font-size: 0.85rem;
    font-weight: 600;
    color: #ffffff;
}
.control-card .val-display {
    font-family: var(--font-family-header);
    font-size: 0.85rem;
    color: var(--accent);
}
.control-card .desc {
    display: block;
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 0.4rem;
    line-height: 1.3;
}

/* Custom Input Sliders */
.custom-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
}
.custom-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 0 10px var(--accent-glow);
    transition: transform 0.1s;
}
.custom-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.action-buttons-row {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

/* Sandbox metrics cards */
.sim-stats-card {
    border: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    padding: 1.25rem;
}
.sim-stats-card h4 {
    font-family: var(--font-family-header);
    font-size: 0.85rem;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}
.sim-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
}
.s-metric {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(255, 255, 255, 0.02);
    padding: 0.5rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.02);
}
.s-metric .sm-lbl {
    font-size: 0.68rem;
    color: var(--text-muted);
    text-align: center;
}
.s-metric .sm-val {
    font-family: var(--font-family-header);
    font-size: 1.2rem;
    font-weight: 700;
    margin-top: 0.25rem;
}
.s-metric .active-text {
    color: var(--accent);
    text-shadow: 0 0 5px var(--accent-glow);
}
.s-metric .status-text {
    font-size: 0.9rem;
    margin-top: 0.5rem;
}
.s-metric .status-text.idle { color: var(--text-muted); }
.s-metric .status-text.running { color: var(--accent); }
.s-metric .status-text.completed { color: var(--primary); }

/* Canvas Visual Display Side */
.sim-display-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: stretch;
}
.canvas-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
    position: relative;
}
.canvas-header h4 {
    font-family: var(--font-family-header);
    font-size: 1.1rem;
    color: #ffffff;
}
.canvas-header p {
    color: var(--text-muted);
    font-size: 0.78rem;
}
.badge {
    position: absolute;
    top: 0;
    right: 0;
    background: rgba(245, 158, 11, 0.1);
    color: var(--accent);
    border: 1px solid rgba(245, 158, 11, 0.3);
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    letter-spacing: 0.5px;
}

.canvas-wrapper {
    background: #06090e;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    height: 350px;
    position: relative;
    overflow: hidden;
}
#contagion-canvas {
    width: 100%;
    height: 100%;
    display: block;
    cursor: crosshair;
}

.graph-wrapper {
    height: 120px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    padding: 0.5rem;
    overflow: hidden;
}
#contagion-chart-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* Toast Notification Styling */
#toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.toast {
    min-width: 280px;
    max-width: 400px;
    background: rgba(18, 25, 41, 0.9);
    backdrop-filter: blur(12px);
    border-left: 4px solid var(--secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    border-radius: 0 8px 8px 0;
    padding: 0.75rem 1.25rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    color: #ffffff;
    display: flex;
    flex-direction: column;
    animation: toastIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    cursor: pointer;
}
.toast.success { border-left-color: var(--primary); }
.toast.alert { border-left-color: var(--accent); }
.toast.danger { border-left-color: var(--danger); }

.toast-header {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    justify-content: space-between;
}
.toast-header.success { color: var(--primary); }
.toast-header.alert { color: var(--accent); }
.toast-header.info { color: var(--secondary); }

.toast-body {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

@keyframes toastIn {
    from { transform: translateX(100%) translateY(20px); opacity: 0; }
    to { transform: translateX(0) translateY(0); opacity: 1; }
}
.toast.fade-out {
    animation: toastOut 0.3s ease-in forwards;
}
@keyframes toastOut {
    to { transform: translateX(100%); opacity: 0; }
}

/* Footer styling */
.app-footer-bar {
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: auto;
}

/* Detail Modal Overlay (For claiming popup or explanation) */
.node-popup {
    position: absolute;
    background: rgba(10, 13, 20, 0.95);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    z-index: 100;
    width: 200px;
    pointer-events: none;
    font-size: 0.75rem;
    backdrop-filter: blur(8px);
}
.node-popup-title { font-weight: 700; color: #ffffff; margin-bottom: 0.25rem; }
.node-popup-desc { color: var(--text-muted); margin-bottom: 0.5rem; }
.node-popup-status { font-weight: 600; text-transform: uppercase; font-size: 0.65rem; }

/* Responsive adjustments */
@media(max-width: 1024px) {
    .spark-layout, .contagion-layout {
        grid-template-columns: 1fr;
    }
}
@media(max-width: 768px) {
    .app-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .stats-row {
        width: 100%;
    }
    .stat-card {
        flex-grow: 1;
    }
    .cascade-grid {
        grid-template-columns: 1fr;
    }
}