:root {
    --bg-dark: #090d16;
    --card-bg: rgba(15, 23, 42, 0.6);
    --card-border: rgba(255, 255, 255, 0.08);
    --card-hover-border: rgba(56, 189, 248, 0.4);
    --text-main: #f3f4f6;
    --text-muted: #94a3b8;
    --accent-cyan: #38bdf8;
    --accent-purple: #c084fc;
    --accent-green: #34d399;
    --accent-amber: #fbbf24;
    --code-bg: rgba(0, 0, 0, 0.4);
}

[data-theme="light"] {
    --bg-dark: #f8fafc;
    --card-bg: rgba(255, 255, 255, 0.8);
    --card-border: rgba(0, 0, 0, 0.08);
    --card-hover-border: rgba(14, 165, 233, 0.4);
    --text-main: #0f172a;
    --text-muted: #64748b;
    --code-bg: rgba(241, 245, 249, 1);
}

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

/* Glassmorphism Cards */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 1.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.glass-card:hover {
    border-color: var(--card-hover-border);
    transform: translateY(-2px);
    box-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.5);
}

/* KPI Enhancements */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.kpi-value {
    font-size: 1.75rem;
    font-weight: 800;
    margin-top: 0.5rem;
    display: block;
    letter-spacing: -0.02em;
}

/* Section Titles */
.section-header-title {
    margin-top: 0;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-main);
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 0.85rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Timeline / Pipeline Flow */
.pipeline-flow {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: relative;
}

.pipeline-flow::before {
    content: '';
    position: absolute;
    top: 2rem;
    bottom: 2rem;
    left: 23px;
    width: 2px;
    background: var(--card-border);
    z-index: 1;
}

.pipeline-step {
    position: relative;
    padding-left: 60px;
}

.step-number {
    position: absolute;
    left: 0;
    top: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-dark);
    border: 2px solid var(--card-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
    z-index: 2;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
}

.step-1 .step-number {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
}

.step-2 .step-number {
    color: var(--accent-purple);
    border-color: var(--accent-purple);
}

.step-3 .step-number {
    color: var(--accent-green);
    border-color: var(--accent-green);
}

.step-4 .step-number {
    color: var(--accent-amber);
    border-color: var(--accent-amber);
}

.step-content {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.5rem;
}

.step-content h4 {
    margin: 0 0 1rem 0;
    font-size: 1.15rem;
    font-weight: 700;
}

.step-list {
    margin: 0;
    padding-left: 1.25rem;
    color: var(--text-muted);
    line-height: 1.7;
    font-size: 0.93rem;
}

.step-list li {
    margin-bottom: 0.5rem;
}

.step-list li:last-child {
    margin-bottom: 0;
}

/* Technical Highlights */
.tech-highlight {
    font-weight: 700;
    color: var(--text-main);
}

/* Inline Code Styling */
code {
    font-family: 'JetBrains Mono', monospace;
    background: var(--code-bg);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.85em;
    border: 1px solid var(--card-border);
}

/* Graph Iframe Box */
.graph-wrapper {
    background: #000;
    border: 1px solid var(--card-border);
    border-radius: 16px;
    overflow: hidden;
    height: 750px;
    margin-bottom: 2.5rem;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.8);
}