/* ==========================================================
   Rate & Equity Dynamics - Modern Financial Styling
   ========================================================== */

:root {
    /* Color Palette - Dark Theme (Default) */
    --bg-main: #0b0f19;
    --bg-card: rgba(18, 24, 38, 0.85);
    --bg-card-hover: rgba(26, 34, 52, 0.95);
    --bg-card-alt: #111726;
    --bg-input: #1a2234;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(99, 102, 241, 0.3);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    /* Brand & Accent Colors */
    --accent-primary: #6366f1;       /* Indigo */
    --accent-primary-light: #818cf8;
    --accent-cyan: #06b6d4;          /* Cyan */
    --accent-emerald: #10b981;       /* Emerald */
    --accent-amber: #f59e0b;         /* Amber */
    --accent-rose: #f43f5e;          /* Rose / Danger */
    --accent-danger: #ef4444;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.4);
    --glow-primary: 0 0 25px rgba(99, 102, 241, 0.25);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    
    --font-sans: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme Overrides */
body.light-theme {
    --bg-main: #f8fafc;
    --bg-card: rgba(255, 255, 255, 0.92);
    --bg-card-hover: #ffffff;
    --bg-card-alt: #edf2f7;
    --bg-input: #e2e8f0;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-highlight: rgba(99, 102, 241, 0.4);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.08);
    --glow-primary: 0 0 20px rgba(99, 102, 241, 0.15);
}

/* ==========================================================
   Reset & Base Styles
   ========================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    position: relative;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Background Atmospheric Glows */
.bg-glow {
    position: fixed;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(140px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.15;
}

.bg-glow-1 {
    top: -100px;
    right: -100px;
    background: radial-gradient(circle, var(--accent-primary), transparent 70%);
}

.bg-glow-2 {
    bottom: 20%;
    left: -150px;
    background: radial-gradient(circle, var(--accent-cyan), transparent 70%);
}

.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 1.5rem;
    position: relative;
    z-index: 1;
}

/* ==========================================================
   Header & Navigation
   ========================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    background: rgba(11, 15, 25, 0.8);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

body.light-theme .site-header {
    background: rgba(248, 250, 252, 0.85);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
}

.logo-icon.small {
    width: 28px;
    height: 28px;
}

.logo-title {
    font-weight: 800;
    font-size: 1.05rem;
    letter-spacing: -0.02em;
    display: block;
    line-height: 1.2;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: block;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.4rem 0.6rem;
    border-radius: var(--radius-sm);
}

.nav-links a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.btn-icon {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.btn-icon:hover {
    border-color: var(--accent-primary);
    transform: translateY(-1px);
}

.moon-icon { display: none; }
body.light-theme .sun-icon { display: none; }
body.light-theme .moon-icon { display: block; }

.btn-github {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
}

.btn-github:hover {
    border-color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-primary-light);
}

/* ==========================================================
   Hero Section
   ========================================================== */
.hero-section {
    padding: 4.5rem 0 3rem;
    text-align: center;
}

.badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    border-radius: var(--radius-full);
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.25);
    color: var(--accent-primary-light);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: 2.75rem;
    font-weight: 900;
    line-height: 1.2;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
}

.gradient-text {
    background: linear-gradient(135deg, #818cf8, #06b6d4, #10b981);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    max-width: 800px;
    margin: 0 auto 3rem;
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.hero-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    max-width: 980px;
    margin: 0 auto;
}

.hero-stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem 1.25rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.hero-stat-card:hover {
    transform: translateY(-3px);
    border-color: var(--border-highlight);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 0.75rem;
}

.stat-icon.channel-1 { background: rgba(99, 102, 241, 0.15); color: var(--accent-primary-light); }
.stat-icon.channel-2 { background: rgba(244, 63, 94, 0.15); color: var(--accent-rose); }
.stat-icon.channel-3 { background: rgba(245, 158, 11, 0.15); color: var(--accent-amber); }

.stat-number {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.825rem;
    color: var(--text-secondary);
}

/* ==========================================================
   Preset Scenarios Bar
   ========================================================== */
.preset-section {
    padding: 1rem 0;
    position: sticky;
    top: 70px;
    z-index: 90;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background: rgba(11, 15, 25, 0.85);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

body.light-theme .preset-section {
    background: rgba(248, 250, 252, 0.88);
}

.preset-wrapper {
    display: flex;
    align-items: center;
    gap: 1rem;
    overflow-x: auto;
    padding-bottom: 2px;
}

.preset-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

.preset-buttons {
    display: flex;
    gap: 0.6rem;
    flex-wrap: nowrap;
}

.btn-preset {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.45rem 0.9rem;
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

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

.btn-preset.active {
    background: var(--accent-primary);
    color: #ffffff;
    border-color: var(--accent-primary);
    box-shadow: 0 2px 10px rgba(99, 102, 241, 0.4);
}

/* ==========================================================
   Content Sections General
   ========================================================== */
.content-section {
    padding: 4.5rem 0;
}

.content-section.bg-alt {
    background-color: var(--bg-card-alt);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
}

.section-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent-cyan);
    margin-bottom: 0.5rem;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* ==========================================================
   Chapter 1: Transmission Channels Grid
   ========================================================== */
.channels-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.channel-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem 1.75rem;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.channel-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-highlight);
    box-shadow: var(--shadow-md);
}

.card-header-icon {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.card-header-icon i {
    width: 32px;
    height: 32px;
    padding: 6px;
    border-radius: var(--radius-sm);
}

.ch-blue i { background: rgba(99, 102, 241, 0.2); color: var(--accent-primary-light); }
.ch-purple i { background: rgba(168, 85, 247, 0.2); color: #c084fc; }
.ch-amber i { background: rgba(245, 158, 11, 0.2); color: var(--accent-amber); }

.ch-tag {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-muted);
}

.channel-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.9rem;
    line-height: 1.4;
}

.ch-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.math-box {
    background: var(--bg-card-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.85rem;
    text-align: center;
    overflow-x: auto;
}

/* ==========================================================
   Two-Column Layouts (Math + Chart)
   ========================================================== */
.two-col-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

.text-content-pane {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.proof-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.proof-card.highlight-border {
    border-color: rgba(99, 102, 241, 0.4);
    background: linear-gradient(180deg, rgba(99, 102, 241, 0.05) 0%, var(--bg-card) 100%);
}

.proof-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.proof-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 0.75rem;
}

.math-callout {
    background: rgba(0, 0, 0, 0.25);
    border-left: 3px solid var(--accent-primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: 0.85rem 1.25rem;
    margin: 0.75rem 0;
    overflow-x: auto;
}

body.light-theme .math-callout {
    background: rgba(0, 0, 0, 0.03);
}

.math-callout.math-primary {
    border-left-color: var(--accent-rose);
    background: rgba(244, 63, 94, 0.06);
}

.proof-conclusion {
    display: flex;
    gap: 0.75rem;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-sm);
    padding: 1rem;
    margin-top: 0.75rem;
    color: var(--text-primary);
    font-size: 0.88rem;
    line-height: 1.55;
}

.proof-conclusion i {
    color: var(--accent-rose);
    flex-shrink: 0;
    margin-top: 2px;
}

.math-note {
    font-size: 0.85rem !important;
    color: var(--text-muted) !important;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
    margin-top: 0.5rem;
}

/* ==========================================================
   Chart Cards & Controls
   ========================================================== */
.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-md);
    position: relative;
}

.chart-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.25rem;
    gap: 1rem;
}

.chart-card-header h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}

.chart-sub {
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: block;
    margin-top: 0.2rem;
}

.badge-tag {
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--accent-primary-light);
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    white-space: nowrap;
}

.chart-canvas-wrapper {
    position: relative;
    height: 300px;
    width: 100%;
    margin-bottom: 1.25rem;
}

.controls-panel {
    background: var(--bg-card-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.control-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.control-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.825rem;
}

.control-label-row label {
    font-weight: 600;
    color: var(--text-secondary);
}

.val-display {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--accent-cyan);
    font-size: 0.85rem;
}

/* Custom Slider Styling */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--bg-input);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
    transition: var(--transition);
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-primary);
    border: 2px solid #ffffff;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
    cursor: pointer;
    transition: var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    background: var(--accent-primary-light);
}

/* Metrics Row inside chart */
.metrics-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
}

.metric-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.65rem 0.5rem;
    text-align: center;
}

.m-label {
    display: block;
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.m-val {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
}

.m-val.highlight {
    color: var(--accent-cyan);
}

.m-val.danger {
    color: var(--accent-rose);
}

/* ==========================================================
   Chapter 3: Duration & Comparison Grid
   ========================================================== */
.explanation-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem 2rem;
    margin-bottom: 2rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.duration-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.chart-legend-custom {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 0.5rem;
    font-size: 0.825rem;
    color: var(--text-secondary);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 3px;
}

.color-before { background-color: #6366f1; }
.color-after { background-color: #f43f5e; }

.stock-compare-table-wrapper {
    margin-top: 1rem;
    overflow-x: auto;
}

.stock-compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.stock-compare-table th {
    text-align: left;
    padding: 0.6rem 0.75rem;
    background: var(--bg-card-alt);
    color: var(--text-muted);
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
}

.stock-compare-table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.badge-val {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-emerald);
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.badge-growth {
    background: rgba(244, 63, 94, 0.15);
    color: var(--accent-rose);
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.drop-val {
    font-family: var(--font-mono);
    font-weight: 700;
    color: #fb923c;
}

.drop-growth {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--accent-rose);
}

/* ==========================================================
   Chapter 4: Multiple Compression
   ========================================================== */
.per-comparison-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-card-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    margin-top: 1rem;
}

.per-stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.per-stat-title {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.per-stat-val {
    font-family: var(--font-mono);
    font-size: 1.15rem;
    font-weight: 700;
}

.text-cyan { color: var(--accent-cyan); }
.text-danger { color: var(--accent-rose); }

.per-arrow {
    color: var(--text-muted);
}

.per-ratio-badge {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--accent-rose);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.85rem;
}

/* ==========================================================
   Chapter 5: Master Unified Simulator
   ========================================================== */
.simulator-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2.25rem;
    box-shadow: var(--shadow-lg);
}

.sim-controls-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.sim-param-box {
    background: var(--bg-card-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: var(--transition);
}

.sim-param-box:hover {
    border-color: var(--border-highlight);
}

.sim-param-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.param-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.param-name i {
    width: 16px;
    height: 16px;
    color: var(--accent-primary-light);
}

.param-val {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--accent-cyan);
    font-size: 0.95rem;
}

.param-desc {
    font-size: 0.72rem;
    color: var(--text-muted);
}

/* Realtime Results Dashboard */
.sim-results-dashboard {
    display: grid;
    grid-template-columns: 1.5fr auto 1.5fr 1.5fr;
    gap: 1rem;
    align-items: center;
    margin-bottom: 2rem;
}

.sim-result-card {
    background: var(--bg-card-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.sim-result-card.shock-card {
    border-color: rgba(244, 63, 94, 0.3);
    background: linear-gradient(180deg, rgba(244, 63, 94, 0.05) 0%, var(--bg-card-alt) 100%);
}

.sim-result-card.impact-card {
    border-color: rgba(245, 158, 11, 0.3);
    background: linear-gradient(180deg, rgba(245, 158, 11, 0.05) 0%, var(--bg-card-alt) 100%);
    text-align: center;
}

.res-tag {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.res-main-val {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.1;
    margin-bottom: 1rem;
}

.danger-text { color: var(--accent-rose); }
.impact-text { color: var(--accent-amber); }

.res-sub-grid {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    padding-top: 0.75rem;
}

.res-sub-grid strong {
    font-family: var(--font-mono);
    color: var(--text-primary);
}

.sim-arrow-divider {
    display: flex;
    justify-content: center;
}

.shock-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    color: var(--accent-rose);
    font-weight: 700;
    font-size: 0.8rem;
    white-space: nowrap;
}

.res-percent-change {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--accent-rose);
    margin-bottom: 0.3rem;
}

.impact-note {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Sensitivity Heatmap Table */
.sensitivity-table-wrapper {
    background: var(--bg-card-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
}

.table-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.table-responsive {
    overflow-x: auto;
}

.heatmap-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    text-align: center;
}

.heatmap-table th {
    padding: 0.6rem 0.5rem;
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-secondary);
    font-weight: 600;
    border: 1px solid var(--border-color);
}

.heatmap-table td {
    padding: 0.65rem 0.5rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.heatmap-table td.current-cell {
    outline: 2px solid var(--accent-cyan);
    font-weight: 800;
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.4);
}

/* ==========================================================
   Chapter 6: Macro Nuance Cards
   ========================================================== */
.nuance-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.nuance-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem 1.75rem;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.nuance-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.nuance-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
}

.nuance-icon.green { background: rgba(16, 185, 129, 0.15); color: var(--accent-emerald); }
.nuance-icon.red { background: rgba(244, 63, 94, 0.15); color: var(--accent-rose); }
.nuance-icon.blue { background: rgba(99, 102, 241, 0.15); color: var(--accent-primary-light); }

.nuance-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.9rem;
    line-height: 1.4;
}

.nuance-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 1.25rem;
    flex-grow: 1;
}

/* ==========================================================
   Summary Table
   ========================================================== */
.summary-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow-md);
}

.summary-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.summary-header i {
    width: 28px;
    height: 28px;
    color: var(--accent-primary-light);
}

.summary-header h2 {
    font-size: 1.5rem;
    font-weight: 800;
}

.summary-table-wrapper {
    overflow-x: auto;
}

.summary-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.summary-table th {
    text-align: left;
    padding: 0.9rem 1rem;
    background: var(--bg-card-alt);
    color: var(--text-primary);
    font-weight: 700;
    border-bottom: 2px solid var(--border-color);
}

.summary-table td {
    padding: 1.1rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    vertical-align: middle;
}

.summary-table td:nth-child(2),
.summary-table td:nth-child(3) {
    white-space: nowrap;
}

/* ==========================================================
   Footer
   ========================================================== */
.site-footer {
    border-top: 1px solid var(--border-color);
    padding: 3rem 0;
    background: var(--bg-card-alt);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 700;
    font-size: 0.95rem;
}

.footer-text {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-links a {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--text-primary);
}

/* ==========================================================
   Responsive Breakpoints
   ========================================================== */
@media (max-width: 1024px) {
    .channels-grid,
    .nuance-grid {
        grid-template-columns: 1fr;
    }

    .two-col-layout,
    .duration-grid {
        grid-template-columns: 1fr;
    }

    .sim-controls-grid {
        grid-template-columns: 1fr 1fr;
    }

    .sim-results-dashboard {
        grid-template-columns: 1fr;
    }

    .sim-arrow-divider {
        transform: rotate(90deg);
        margin: 0.5rem 0;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-stats-grid {
        grid-template-columns: 1fr;
    }

    .control-row {
        grid-template-columns: 1fr;
    }

    .metrics-row {
        grid-template-columns: 1fr 1fr;
    }

    .sim-controls-grid {
        grid-template-columns: 1fr;
    }

    .footer-inner {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
}