:root {
    --bg-color: #F8F9FA;
    --bg-hero: #FFFFFF;
    --text-primary: #212529;
    --text-secondary: #495057;
    --text-muted: #6c757d;
    --accent-color: #007BFF;
    --accent-gradient-start: #007BFF;
    --accent-gradient-end: #0056b3;
    --card-bg: #FFFFFF;
    --card-border: #DEE2E6;
    --btn-bg: #E9ECEF;
    --btn-hover-bg: #CED4DA;
    --timeline-line: #DEE2E6;
    --timeline-dot-bg: #F8F9FA;
    --timeline-dot-border: #007BFF;
    --header-bg: rgba(248, 249, 250, 0.8);
    --canvas-bg: #eef2ff;
    --niu-path-color: #CFD8DC;
    --niu-target-color: #ECEFF1;
    --niu-main-color: #007BFF;
    --niu-secondary-color: #0056b3;
    --npu-bio-neuron: #90CAF9;
    --npu-bio-glia: #A5D6A7;
    --npu-bio-vascular: #F48FB1;
    --npu-synth-core: #A5D6A7;
    --npu-synth-trace: #E6EE9C;
    --npu-link-color: #B0BEC5;
    --paper-bg: #FFFFFF;
}

html.dark {
    --bg-color: #0a0a1a;
    --bg-hero: radial-gradient(ellipse at bottom, #1b2735 0%, #090a0f 100%);
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-muted: #888888;
    --accent-color: #00ffff;
    --accent-gradient-start: #00ffff;
    --accent-gradient-end: #00aaff;
    --card-bg: rgba(22, 28, 41, 0.5);
    --card-border: rgba(255, 255, 255, 0.1);
    --btn-bg: #313244;
    --btn-hover-bg: #45475a;
    --timeline-line: rgba(0, 255, 255, 0.1);
    --timeline-dot-bg: #0a0a1a;
    --timeline-dot-border: #00ffff;
    --header-bg: rgba(10, 15, 26, 0.8);
    --canvas-bg: #1e1e2e;
    --niu-path-color: #45475a;
    --niu-target-color: #313244;
    --niu-main-color: #89b4fa;
    --niu-secondary-color: #b4befe;
    --npu-bio-neuron: #89b4fa;
    --npu-bio-glia: #a6e3a1;
    --npu-bio-vascular: #f38ba8;
    --npu-synth-core: #a6e3a1;
    --npu-synth-trace: #fab387;
    --npu-link-color: #f38ba8;
    --paper-bg: #111827;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.hero-bg { background: var(--bg-hero); }
.header-bg {
        background-color: var(--header-bg);
        backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.accent-text { color: var(--accent-color); }
.card-bg {
    background-color: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
}
.card-bg {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    border-radius: 0.75rem;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}
.btn-primary {
    background: linear-gradient(90deg, var(--accent-gradient-start), var(--accent-gradient-end));
    transition: all 0.3s ease;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 255, 255, 0.2);
}
.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    transition: all 0.3s ease;
}
.btn-secondary:hover {
    background-color: rgba(0, 255, 255, 0.1);
    transform: translateY(-2px);
}
.btn-toggle {
    background-color: var(--btn-bg);
    color: var(--text-secondary);
    border-radius: 9999px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.2s;
}
.btn-toggle:hover { background-color: var(--btn-hover-bg); }

.tech-pillar {
    transition: opacity 0.8s ease, transform 0.8s ease;
    opacity: 0;
    transform: translateY(20px);
}
.tech-pillar.visible { opacity: 1; transform: translateY(0); }

.neuron {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 255, 255, 0.1), rgba(0, 255, 255, 0.4));
    border: 1px solid rgba(0, 255, 255, 0.5);
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    position: relative;
}
.neuron.synthetic {
    background: radial-gradient(circle, rgba(0, 255, 255, 0.8), #00ffff);
    border-radius: 8px;
    transform: scale(1.1) rotate(45deg);
    box-shadow: 0 0 12px #00ffff;
}

.protocol-step {
    opacity: 0;
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.protocol-step.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Timeline Styles */
.timeline-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background-color: var(--timeline-line);
}
.timeline-item {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.timeline-item.visible { opacity: 1; transform: translateY(0); }
.timeline-dot {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background-color: var(--timeline-dot-bg);
    border: 3px solid var(--timeline-dot-border);
    border-radius: 50%;
    z-index: 10;
}
.timeline-content { width: calc(50% - 40px); }

/* Table Styles */
.funding-table th, .funding-table td { padding: 0.75rem 1rem; text-align: left; }
.funding-table thead { background-color: rgba(0, 255, 255, 0.05); }
.funding-table tbody tr { border-bottom: 1px solid var(--card-border); }
.funding-table tbody tr:last-child { border-bottom: none; }

/* ROI Infinity Symbol */
.infinity {
    font-size: 8rem;
    line-height: 1;
    color: var(--accent-color);
    text-shadow: 0 0 15px rgba(0, 255, 255, 0.5), 0 0 30px rgba(0, 255, 255, 0.3);
    animation: pulse 4s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.05); opacity: 1; }
}

/* Research Paper Styles */
.research-paper {
    background-color: var(--paper-bg);
    color: var(--text-secondary);
    border: 1px solid var(--card-border);
    border-radius: 0.5rem;
    padding: 2rem 3rem;
    margin-top: 4rem;
    line-height: 1.75;
}
.research-paper h2, .research-paper h3 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--card-border);
}
.research-paper h2 { font-size: 1.875rem; margin-top: 2rem; }
.research-paper h3 { font-size: 1.25rem; margin-top: 1.5rem; }
.research-paper p { margin-bottom: 1rem; }
.research-paper strong { color: var(--text-primary); font-weight: 600; }
.research-paper .abstract {
    background-color: var(--bg-color);
    padding: 1.5rem;
    border-radius: 0.25rem;
    border-left: 4px solid var(--accent-color);
}

#qct-canvas {
    width: 100%;
    height: 100%;
    border-radius: 0.5rem;
    background-color: var(--canvas-bg);
    transition: background-color 0.3s ease;
}
#data-stream-1, #data-stream-2, #data-stream-3 {
    stroke-dasharray: 3;
    animation: data-flow 2s linear infinite;
    opacity: 0;
    transition: opacity 0.5s ease;
}
#npu-side {
    opacity: 0;
    transition: opacity 0.5s ease;
}
@keyframes data-flow {
    to { stroke-dashoffset: -6; }
}