@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Text:ital@0;1&family=Fira+Code:wght@400;500&family=Inter:wght@300;400;500;600;700&family=Libre+Baskerville:wght@400;700&family=LINE+Seed+JP:wght@400;700;800&display=swap');

:root {
    /* Color Palette - Refined Eggshell & Bitter Orange */
    --bg-main: hsl(30, 24%, 96%); /* Eggshell base */
    --bg-surface: rgba(255, 255, 255, 0.7); /* Glassmorphic translucent white */
    --bg-surface-elevated: rgba(255, 255, 255, 0.95);
    --border-color: rgba(60, 45, 30, 0.08); /* Warm brown border */
    --border-hover: rgba(60, 45, 30, 0.18);
    
    --text-primary: hsl(30, 20%, 15%); /* Deep warm charcoal */
    --text-secondary: hsl(30, 12%, 32%); /* Warm grey-brown */
    --text-muted: hsl(30, 8%, 52%); /* Muted warm grey */
    
    /* Accents (Bitter Orange, Rust Terracotta, Amber Orange, Sage Green) */
    --accent-primary: hsl(20, 90%, 55%); /* Bitter Orange */
    --accent-secondary: hsl(15, 80%, 45%); /* Terracotta/Rust */
    --accent-tertiary: hsl(35, 95%, 50%); /* Amber Orange */
    --accent-success: hsl(145, 45%, 38%); /* Sage Green */
    --accent-success-hover: hsl(145, 45%, 45%);
    --accent-glow: rgba(249, 115, 22, 0.08);
    
    --accent-gradient: linear-gradient(135deg, hsl(20, 90%, 55%) 0%, hsl(35, 95%, 50%) 100%);
    --emerald-gradient: linear-gradient(135deg, hsl(145, 45%, 38%) 0%, hsl(160, 50%, 35%) 100%);
    --dark-gradient: linear-gradient(180deg, hsl(30, 24%, 97%) 0%, hsl(30, 24%, 93%) 100%);
    
    /* Font Stacks */
    --font-heading: 'DM Serif Text', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'Fira Code', 'Courier New', Courier, monospace;
    --font-nav: 'LINE Seed JP', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    --header-scroll-offset: 6.5rem;
    --paper-local-header-height: 3.05rem;
    --paper-side-width: 260px;
    --paper-main-width: 850px;
}

/* Reset and Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    scroll-padding-top: calc(var(--site-nav-offset, var(--header-scroll-offset)) + var(--paper-local-header-height, 0px));
}

body {
    background-color: var(--bg-main);
    background-image: var(--dark-gradient);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

::selection {
    background: rgba(249, 115, 22, 0.2);
    color: var(--text-primary);
}

/* Background Gradients & Glow Effects */
.bg-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
    background: radial-gradient(circle at 80% 10%, rgba(249, 115, 22, 0.03) 0%, transparent 60%),
                radial-gradient(circle at 20% 80%, rgba(145, 45, 38, 0.02) 0%, transparent 60%);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: rgba(60, 45, 30, 0.15);
    border-radius: 5px;
    border: 2px solid var(--bg-main);
    transition: var(--transition-fast);
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(60, 45, 30, 0.3);
}

/* Layout Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding:3rem 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 500;
    letter-spacing: -0.01em;
    line-height: 1.25;
}

p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navigation Header */
header {
    position: sticky;
    top: var(--site-nav-offset, var(--header-scroll-offset));
    left: 0;
    width: 100%;
    z-index: 40;
    background: rgba(245, 241, 235, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(60, 45, 30, 0.02);
}

header .container,
header .paper-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 3.05rem;
    gap: 1.1rem;
    padding-top: 0.18rem;
    padding-bottom: 0.18rem;
}

.logo {
    font-family: var(--font-nav);
    font-size: clamp(0.92rem, 0.65rem + 0.9vw, 1.15rem);
    font-weight: 500;
    letter-spacing: 0.04em;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.55rem;
    flex-shrink: 1;
    min-width: 0;
}

.logo span:last-child {
    white-space: nowrap;
}

.logo-mark {
    width: 1.2rem;
    height: 1.2rem;
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
}

.logo-mark img {
    width: 100%;
    height: 100%;
    display: block;
}

/* Scoped with :not(.nav) so these page-local nav styles never leak into the
   shared <nav class="nav"> injected by the site-nav component. */
nav:not(.nav) {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1 1 auto;
    min-width: 0;
    flex-wrap: wrap;
    gap: clamp(0.8rem, 1vw, 1.6rem);
}

nav:not(.nav) a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 550;
    position: relative;
    padding: 0.18rem 0;
    transition: var(--transition-fast);
    white-space: nowrap;
}

nav:not(.nav) a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: var(--transition-fast);
}

nav:not(.nav) a:hover {
    color: var(--text-primary);
}

nav:not(.nav) a:hover::after {
    width: 100%;
}

.nav-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.35rem;
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.4rem;
    border-radius: 0;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-primary {
    background: rgba(249, 115, 22, 0.12);
    color: var(--text-primary);
    border: 0;
    border-bottom: 2px solid rgba(60, 45, 30, 0.34);
    box-shadow: none;
}

.btn-primary:hover {
    background: rgba(249, 115, 22, 0.18);
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    background: rgba(249, 115, 22, 0.12);
    color: var(--text-secondary);
    border: 0;
    border-bottom: 1px solid rgba(60, 45, 30, 0.18);
    backdrop-filter: none;
}

.btn-secondary:hover {
    background: rgba(249, 115, 22, 0.18);
    color: var(--text-primary);
    border-color: rgba(60, 45, 30, 0.32);
    transform: none;
    box-shadow: none;
}

.btn-active {
    background: transparent;
    color: var(--text-muted);
    border: 0;
    border-bottom: 1px solid rgba(60, 45, 30, 0.1);
    box-shadow: none;
    cursor: default;
    pointer-events: none;
}

.btn-sm {
    padding: 0.28rem 0.62rem;
    font-size: 0.76rem;
    border-radius: 0;
}

.nav-buttons .btn {
    font-family: var(--font-nav);
    font-weight: 400;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    white-space: nowrap;
}

/* Hero Section */
.hero {
    padding-top: 6.4rem;
    padding-bottom: 6rem;
    text-align: center;
    position: relative;
}

.hero-tag {
    display: inline-block;
    padding: 0.35rem 0.85rem;
    background: rgba(60, 45, 30, 0.04);
    border: 1px solid rgba(60, 45, 30, 0.08);
    border-radius: 6px;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    letter-spacing: 0.02em;
}

.hero h1 {
    font-size: 3.75rem;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 2.5rem;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 4rem;
}

.meta-badges {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.85rem;
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    transition: var(--transition-fast);
}

.badge:hover {
    background: rgba(255, 255, 255, 0.9);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.badge i {
    font-size: 0.85rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Section Common Styling */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.section-header p {
    max-width: 600px;
    margin: 0 auto;
}

/* Cards */
.card {
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-color);
    border-radius: 12px; /* A bit more structured than 18px */
    padding: 2.5rem;
    box-shadow: 0 4px 12px rgba(60, 45, 30, 0.03);
    transition: var(--transition-smooth);
    overflow: hidden;
}

.card:hover {
    border-color: rgba(60, 45, 30, 0.15);
    box-shadow: 0 10px 25px rgba(60, 45, 30, 0.06);
}

/* Abstract Section */
.abstract-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.abstract-text h3 {
    font-size: 1.75rem;
    font-weight: 500;
    margin-bottom: 1.25rem;
}

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

.stat-box {
    padding: 1.75rem;
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-align: center;
    transition: var(--transition-smooth);
    box-shadow: 0 2px 8px rgba(60, 45, 30, 0.02);
}

.stat-box:hover {
    border-color: var(--border-hover);
    box-shadow: 0 6px 15px rgba(60, 45, 30, 0.05);
}

.stat-num {
    font-family: var(--font-heading);
    font-size: 2.75rem;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 0.5rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

/* Tabs Architecture Section */
.architecture-tabs-container {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.tabs-list {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--border-color);
    padding: 0.4rem;
    border-radius: 14px;
    max-width: 650px;
    margin: 0 auto;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 4px 15px rgba(60, 45, 30, 0.02);
}

.tab-btn {
    flex: 1;
    padding: 0.8rem 1.2rem;
    background: transparent;
    border: none;
    border-radius: 10px;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.tab-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.4);
}

.tab-btn.active {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(249, 115, 22, 0.3);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

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

.architecture-grid {
    display: grid;
    grid-template-columns: 5fr 6fr;
    gap: 3.5rem;
    align-items: start;
}

.arch-visuals {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.visual-wrapper {
    background: rgba(255, 255, 255, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(4px);
    box-shadow: 0 8px 25px rgba(60, 45, 30, 0.03);
}

.visual-wrapper img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(60, 45, 30, 0.1);
    transition: var(--transition-smooth);
}

.visual-wrapper img:hover {
    transform: scale(1.03);
}

.visual-caption {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 0.5rem;
}

.arch-desc {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.arch-desc h3 {
    font-size: 1.65rem;
    font-weight: 500;
}

.arch-desc ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.arch-desc li {
    position: relative;
    padding-left: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.arch-desc li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: 700;
}

/* Codebox Styles */
.codebox {
    background: hsl(30, 15%, 12%);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-left: 3px solid var(--accent-secondary);
    border-radius: 10px;
    padding: 1.25rem;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: hsl(30, 20%, 90%);
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.5);
    transition: var(--transition-smooth);
}

.codebox:hover {
    border-color: rgba(249, 115, 22, 0.3);
    border-left-color: var(--accent-primary);
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.6);
}

.codebox pre {
    margin: 0;
}

/* Interactive Architecture Sandbox Section */
.playground-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
}

.interactive-card {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.interactive-card h3 {
    font-size: 1.65rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.interactive-card h3 i {
    color: var(--accent-primary);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.control-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.control-label span.value-bubble {
    font-family: var(--font-mono);
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.8);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

/* Custom Slider Styles */
input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
}

input[type=range]:focus {
    outline: none;
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 8px;
    cursor: pointer;
    background: rgba(60, 45, 30, 0.06);
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

input[type=range]::-webkit-slider-thumb {
    height: 20px;
    width: 20px;
    border-radius: 50%;
    background: white;
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: -7px;
    box-shadow: 0 2px 6px rgba(60, 45, 30, 0.2);
    border: 2px solid var(--accent-primary);
    transition: var(--transition-fast);
}

input[type=range]::-webkit-slider-thumb:hover {
    background: white;
    border-color: var(--accent-tertiary);
    box-shadow: 0 0 10px rgba(249, 115, 22, 0.4);
    transform: scale(1.2);
}

.visualizer-output {
    background: rgba(255, 255, 255, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 1.5rem;
}

.output-row {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.output-row:last-child {
    margin-bottom: 0;
}

.output-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    font-weight: 600;
}

.output-math {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.progress-track {
    width: 100%;
    height: 10px;
    background: rgba(60, 45, 30, 0.06);
    border-radius: 5px;
    overflow: hidden;
    position: relative;
    border: 1px solid rgba(60, 45, 30, 0.02);
}

.progress-fill {
    height: 100%;
    width: 0%;
    border-radius: 5px;
    background: linear-gradient(90deg, hsl(20, 90%, 55%), hsl(35, 95%, 50%), hsl(20, 90%, 55%));
    background-size: 200% auto;
    animation: gradientShift 4s linear infinite;
    transition: width 0.25s cubic-bezier(0.1, 0.8, 0.2, 1);
}

.progress-fill.success {
    background: linear-gradient(90deg, hsl(145, 45%, 38%), hsl(160, 50%, 35%));
    background-size: 200% auto;
    animation: gradientShift 4s linear infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

/* Routing Sim Specifics */
.gate-weight-bars {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    margin-top: 1rem;
}

.weight-row {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.weight-label {
    width: 70px;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.85rem;
    transition: var(--transition-fast);
}

.weight-percent {
    width: 50px;
    text-align: right;
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.weight-bar-track {
    flex: 1;
    height: 14px;
    background: rgba(60, 45, 30, 0.06);
    border-radius: 7px;
    overflow: hidden;
    border: 1px solid rgba(60, 45, 30, 0.02);
}

.weight-bar-fill {
    height: 100%;
    width: 0%;
    border-radius: 7px;
    background: linear-gradient(90deg, hsl(20, 90%, 55%), hsl(35, 95%, 50%), hsl(20, 90%, 55%));
    background-size: 200% auto;
    animation: gradientShift 4s linear infinite;
    transition: width 0.25s cubic-bezier(0.1, 0.8, 0.2, 1);
}

/* Results Section */
.results-grid {
    display: grid;
    grid-template-columns: 7fr 5fr;
    gap: 3.5rem;
    align-items: start;
}

/* Results Table */
.table-wrapper {
    overflow-x: auto;
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(60, 45, 30, 0.02);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

th, td {
    padding: 1.1rem 1.4rem;
    border-bottom: 1px solid var(--border-color);
}

th {
    background: rgba(60, 45, 30, 0.02);
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
}

tr:last-child td {
    border-bottom: none;
}

tr {
    transition: var(--transition-fast);
}

tr:hover td {
    background: rgba(255, 255, 255, 0.5);
    color: var(--text-primary);
}

td.highlight-cell {
    font-weight: 700;
    color: var(--accent-success);
    text-shadow: 0 0 10px rgba(145, 45, 38, 0.1);
}

.results-analysis {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.results-analysis h3 {
    font-size: 1.65rem;
    font-weight: 500;
}

.results-intro {
    max-width: 780px;
    margin: 0 auto;
    padding: 1.15rem 1.5rem;
    text-align: center;
}

.results-intro h2 {
    font-size: 2.1rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.results-intro p {
    max-width: 620px;
    margin: 0 auto;
}

.results-intro + .results-grid {
    margin-top: 3rem;
}

.callout-box {
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: var(--transition-smooth);
}

.callout-box:hover {
    background: rgba(255, 255, 255, 0.8);
    border-color: var(--border-hover);
}

.callout-box h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

/* Citation Section */
.citation-card {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

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

.copy-btn {
    background: rgba(60, 45, 30, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.8rem;
    font-family: var(--font-body);
    font-weight: 600;
    transition: var(--transition-fast);
}

.copy-btn:hover {
    color: var(--text-primary);
    background: rgba(60, 45, 30, 0.1);
    border-color: rgba(60, 45, 30, 0.2);
    transform: translateY(-1px);
}

/* Footer Section */
footer {
    padding: 5rem 0;
    border-top: 1px solid var(--border-color);
    background: rgba(240, 235, 227, 0.85);
    text-align: center;
}

footer p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1.25rem;
}

.footer-emails {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
    margin-top: -0.35rem;
    margin-bottom: 1.1rem;
}

.footer-email {
    font-family: var(--font-mono);
    font-size: 0.84rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.social-links a {
    color: var(--text-muted);
    font-size: 1rem;
    transition: var(--transition-fast);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
}

.social-links a i {
    font-size: 1.25rem;
}

.social-links a:hover {
    color: var(--text-primary);
    transform: translateY(-2px);
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
    .abstract-grid, .architecture-grid, .playground-grid, .results-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .hero h1 {
        font-size: 3rem;
    }
}

@media (max-width: 1220px) {
    :root {
        --header-scroll-offset: 5.2rem;
    }
    header .paper-container {
        gap: 0.85rem;
    }
    .logo {
        font-size: clamp(0.86rem, 0.55rem + 0.7vw, 1.02rem);
    }
    .nav-buttons {
        gap: 0.45rem;
    }
    .btn-sm {
        padding: 0.34rem 0.7rem;
        font-size: 0.72rem;
    }
}

@media (max-width: 1080px) {
    :root {
        --header-scroll-offset: 6.4rem;
    }
    header .paper-container {
        flex-wrap: wrap;
        justify-content: center;
        row-gap: 0.25rem;
    }
    .logo {
        flex: 1 1 100%;
        justify-content: center;
    }
    .nav-buttons {
        justify-content: center;
    }
}

@media (max-width: 576px) {
    :root {
        --header-scroll-offset: 7rem;
    }
    header .container,
    header .paper-container {
        flex-direction: column;
        justify-content: center;
        height: auto;
        gap: 0.35rem;
        padding-top: 0.28rem;
        padding-bottom: 0.28rem;
    }
    .logo {
        font-size: 0.9rem;
    }
    .nav-buttons {
        justify-content: center;
    }
    .hero {
        padding-top: 6.8rem;
    }
    .hero h1 {
        font-size: 2.25rem;
    }
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .btn {
        justify-content: center;
    }
}

/* Paper Page Specific Layout & Styles */
.paper-container {
    max-width: 1560px;
    margin: 0 auto;
    padding: 0 2rem;
}

.paper-layout {
    display: grid;
    grid-template-columns: var(--paper-side-width) minmax(0, var(--paper-main-width)) var(--paper-side-width);
    gap: 3rem;
    align-items: start;
    justify-content: center;
    padding-top: 6.15rem;
    padding-bottom: 6rem;
}

.paper-toc,
.paper-refs-sidebar {
    width: 100%;
}

/* Right References Sidebar */
.paper-refs-sidebar {
    position: sticky;
    top: calc(var(--site-nav-offset, var(--header-scroll-offset)) + var(--paper-local-header-height) + 0.4rem);
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.75rem;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(60, 45, 30, 0.03);
    max-height: calc(100vh - 10rem);
    overflow-y: auto;
    overscroll-behavior: contain;
}

.paper-refs-sidebar h3 {
    font-size: 1.1rem;
    margin-bottom: 1.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
    color: var(--text-primary);
}

.paper-refs-sidebar ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.paper-refs-sidebar li {
    position: relative;
}

.paper-refs-sidebar a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.78rem;
    font-weight: 500;
    display: block;
    line-height: 1.35;
    transition: var(--transition-fast);
}

.paper-refs-sidebar a:hover {
    color: var(--accent-primary);
    transform: translateX(4px);
}

.paper-refs-sidebar .ref-number {
    color: var(--accent-primary);
    font-weight: 500;
    margin-right: 0.25rem;
}

.paper-refs-sidebar .ref-full-text {
    display: none;
    margin-top: 0.45rem;
    padding: 0.55rem 0.65rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.62);
    font-size: 0.74rem;
    line-height: 1.45;
    color: var(--text-secondary);
}

.paper-refs-sidebar li.ref-expanded > a {
    color: var(--text-primary);
}

.paper-refs-sidebar li.ref-expanded .ref-full-text {
    display: block;
}

/* Scrollbar styling for refs sidebar */
.paper-refs-sidebar::-webkit-scrollbar {
    width: 4px;
}
.paper-refs-sidebar::-webkit-scrollbar-track {
    background: transparent;
}
.paper-refs-sidebar::-webkit-scrollbar-thumb {
    background: rgba(60, 45, 30, 0.15);
    border-radius: 4px;
}

.paper-toc {
    position: sticky;
    top: calc(var(--site-nav-offset, var(--header-scroll-offset)) + var(--paper-local-header-height) + 0.4rem);
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.75rem;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(60, 45, 30, 0.03);
}

.paper-toc h3 {
    font-size: 1.1rem;
    margin-bottom: 1.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
    color: var(--text-primary);
}

.paper-toc ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.paper-toc a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    display: block;
    transition: var(--transition-fast);
}

.paper-toc a:hover {
    color: var(--accent-primary);
    transform: translateX(4px);
}

/* Paper Sheet Styling (Simulating Letter Page) */
.paper-sheet {
    background: #ffffff;
    border: 1px solid rgba(60, 45, 30, 0.06);
    border-radius: 0; /* Sharp academic page edges */
    padding: 3.75rem 4.5rem; /* Standard CVPR margin proportions */
    box-shadow: 0 12px 35px rgba(60, 45, 30, 0.05);
    max-width: 850px; /* Authentic print width */
    width: 100%;
    justify-self: center;
    position: relative;
}

.paper-title-section {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
}

.paper-title-section h1 {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-size: 1.7rem;
    margin-top: 1.3rem;
    margin-bottom: 1.25rem;
    line-height: 1.2;
    color: var(--text-primary);
    font-weight: 500;
    letter-spacing: 0;
}

.paper-authors {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 1rem;
}

.author-block {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.author-block strong {
    color: var(--text-primary);
    font-size: 1.05rem;
    font-family: Georgia, serif;
}

.author-block span {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-family: Georgia, serif;
}

.author-email {
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    text-decoration: none;
    margin-top: 0.15rem;
}

.author-email:hover {
    color: var(--accent-primary);
    text-decoration: underline;
}

.paper-course {
    color: var(--text-secondary);
    font-family: Georgia, serif;
    font-size: 0.95rem;
    margin-top: 1rem;
    text-align: center;
}

.paper-date {
    color: var(--text-secondary);
    font-family: Georgia, serif;
    font-size: 0.95rem;
    margin-top: 0.25rem;
    text-align: center;
}

/* Abstract Box Layout */
.abstract-box h3 {
    text-align: center;
    font-size: 1.05rem;
    font-family: Georgia, serif;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

.abstract-box p {
    font-family: Georgia, 'Times New Roman', Times, serif;
    font-size: 0.88rem; /* LaTeX abstract is 9pt */
    line-height: 1.42;
    color: var(--text-primary);
    font-style: normal;
    text-indent: 0;
}

/* Two-Column Flow */
.paper-content-columns {
    column-count: 2;
    column-gap: 2.25rem;
    text-align: justify;
}

.paper-content-columns > *:first-child {
    margin-top: 0 !important;
}

.subsection-columns {
    column-count: 2;
    column-gap: 2.25rem;
    text-align: justify;
}

.subsection-columns > *:first-child {
    margin-top: 0 !important;
}

.paper-sheet section {
    padding: 0.65rem 0;
}

.paper-sheet section:first-of-type {
    padding-top: 0;
}

.paper-sheet section + section {
    border-top: none;
    margin-top: 0;
    padding-top: 0.35rem;
}

.paper-sheet section[id],
.references-list li[id] {
    scroll-margin-top: calc(var(--site-nav-offset, var(--header-scroll-offset)) + var(--paper-local-header-height));
}

.abstract-box {
    margin: 0 4.5rem 1.35rem;
    text-align: justify;
    padding-bottom: 0;
    border-bottom: none;
}

.span-both-columns {
    column-span: all;
    width: 100%;
}

/* Paragraph Layout (Indentation & Tight Spacing) */
.paper-content-columns p {
    font-family: Georgia, 'Times New Roman', Times, serif;
    font-size: 0.92rem; /* LaTeX body text is 10pt */
    line-height: 1.38; /* Academic line height */
    color: var(--text-primary);
    margin-top: 0;
    margin-bottom: 0;
    text-indent: 1.5em; /* Academic paragraph indent */
}

/* Clear indent for first paragraph after headings or elements */
.paper-content-columns h2 + p,
.paper-content-columns h3 + p,
.paper-content-columns h4 + p,
.paper-content-columns figure + p,
.paper-content-columns .equation-row + p,
.paper-content-columns .table-wrapper + p,
.paper-content-columns p:first-of-type {
    text-indent: 0;
}

/* Headings inside Columns & Section Headings */
.paper-sheet h2,
.paper-content-columns h3,
.paper-content-columns h4 {
    text-indent: 0;
    font-family: var(--font-heading);
    font-weight: 500;
}

.paper-sheet h2 {
    font-family: Georgia, serif;
    font-size: 1.05rem;
    text-transform: uppercase; /* Replicates LaTeX uppercase main headers */
    letter-spacing: 0.05em;
    font-weight: 500;
    border-bottom: none;
    padding-bottom: 0;
    margin-top: 0;
    margin-bottom: 1rem;
    text-align: center; /* CVPR/IEEE section headers are centered */
    width: 100%;
}

.paper-content-columns h3,
.paper-content-columns h4 {
    column-break-after: avoid;
    break-inside: avoid;
    margin-top: 1.25rem;
    margin-bottom: 0.7rem;
}

.paper-content-columns h3 {
    font-size: 0.95rem;
}

.paper-content-columns h4 {
    font-size: 0.9rem;
    font-style: italic;
    font-weight: 600;
}

.citation-link {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 550;
}

.citation-link:hover {
    text-decoration: underline;
}

/* Figures and Captions */
.paper-figure {
    margin: 1.25rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    break-inside: avoid;
    text-indent: 0;
}

.paper-figure.span-both-columns {
    margin: 2.25rem 0;
    column-span: all;
}

.paper-figure img {
    max-width: 100%;
    height: auto;
    border-radius: 0; /* Keep it print-style */
    box-shadow: 0 4px 15px rgba(60, 45, 30, 0.04);
}

.paper-figure figcaption {
    font-family: Georgia, serif;
    font-size: 0.82rem;
    color: var(--text-secondary);
    text-align: justify;
    line-height: 1.4;
    padding: 0 0.25rem;
}

/* Lists */
.paper-content-columns ul,
.paper-content-columns ol {
    margin: 0.75rem 0;
    padding-left: 1.25rem;
    text-indent: 0;
    break-inside: avoid;
}

.paper-content-columns li {
    font-family: Georgia, serif;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    font-size: 0.92rem;
    line-height: 1.45;
}

/* Equations Styling */
.equation-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0.75rem 0;
    width: 100%;
    break-inside: avoid;
    text-indent: 0;
}

.equation-math {
    flex: 1;
    text-align: center;
    overflow-x: visible;
    font-size: 0.82rem;
}

.equation-number {
    font-family: Georgia, serif;
    color: var(--text-primary);
    font-size: 0.92rem;
    font-weight: 500;
    padding-left: 0.5rem;
    white-space: nowrap;
}

/* MathJax custom adjustments */
.mjx-chtml {
    margin: 0 !important;
    outline: none;
}

/* References Section */
.references-section {
    break-inside: avoid;
}

.references-section .paper-content-columns {
    column-count: 1;
}

/* Table Caption (below table, academic style) */
.table-caption {
    font-family: Georgia, 'Times New Roman', Times, serif;
    font-size: 0.82rem;
    line-height: 1.4;
    color: var(--text-secondary);
    text-align: justify;
    margin-top: 0.5rem;
    padding: 0 0.25rem;
}

.table-caption strong {
    color: var(--text-primary);
}

.page-break-divider {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    margin: 1.15rem 0 1.35rem;
    width: 100%;
}

.page-break-divider::before {
    content: '';
    flex: 1 1 auto;
    border-top: 1px solid rgba(60, 45, 30, 0.18);
}

.page-break-divider span {
    flex: 0 0 auto;
    font-family: var(--font-mono);
    font-size: 0.66rem;
    letter-spacing: 0.04em;
    color: rgba(60, 45, 30, 0.45);
    text-transform: uppercase;
}

.references-list {
    list-style: none;
    padding-left: 0;
    margin-top: 1rem;
    text-indent: 0;
    column-count: 2;
    column-gap: 2.25rem;
}

.references-list li {
    font-family: Georgia, serif;
    font-size: 0.82rem;
    line-height: 1.4;
    margin-bottom: 0.5rem;
    text-align: justify;
    padding-left: 1.25rem;
    text-indent: -1.25rem; /* Hanging indent for bibliography */
    color: var(--text-secondary);
    break-inside: avoid;
    scroll-margin-top: 6rem;
}

.references-list li em {
    font-style: italic;
}

/* Appendices elements breaking layout prevention */
.paper-sheet hr {
    column-span: all;
    border: 0;
    border-top: 1px solid var(--border-color);
    margin: 2.75rem 0 2rem;
}

@media (max-width: 1530px) {
    .paper-layout {
        grid-template-columns: var(--paper-side-width) 1fr;
        gap: 3rem;
    }
    .paper-refs-sidebar {
        display: none;
    }
}

@media (max-width: 992px) {
    .paper-layout {
        grid-template-columns: 1fr;
        gap: 2.5rem;
        padding-top: 6.4rem;
    }
    .paper-toc {
        position: relative;
        top: 0;
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .paper-sheet {
        padding: 2.5rem 1.75rem;
    }
    .abstract-box {
        margin-right: 0.25rem;
        margin-left: 0.25rem;
    }
    .paper-content-columns {
        column-count: 1;
        column-gap: 0;
    }
    .paper-authors {
        flex-direction: column;
        gap: 1rem;
    }
    .paper-title-section h1 {
        font-size: 1.85rem;
    }
}/* Academic Table Formatting (Booktabs style) */
.paper-sheet .table-wrapper {
    overflow-x: visible;
    background: transparent;
    border: none;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    margin: 1.25rem 0;
    width: 100%;
    break-inside: avoid;
}

.paper-sheet table {
    width: 100%;
    border-collapse: collapse;
    border-top: 1.5px solid var(--text-primary);
    border-bottom: 1.5px solid var(--text-primary);
    font-size: 0.8rem;
}

.paper-sheet th,
.paper-sheet td {
    padding: 0.4rem 0.35rem;
    border: none;
    border-bottom: 1px solid rgba(60, 45, 30, 0.08);
    font-family: Georgia, serif;
    font-size: 0.8rem;
}

.paper-sheet th {
    font-weight: bold;
    color: var(--text-primary);
    border-bottom: 1px solid var(--text-primary);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.02em;
}

.paper-sheet tr:last-child td {
    border-bottom: none;
}

.paper-sheet td.highlight-cell {
    font-weight: bold;
    color: var(--text-primary);
    text-shadow: none;
}

#appendix .codebox {
    overflow-x: hidden;
}

#appendix .codebox pre {
    white-space: pre-wrap;
    word-break: break-word;
    overflow-wrap: anywhere;
}

/* Room for the bullets; without it the left column clips them. */
#appendix ul {
    padding-left: 1.2rem;
}

/* Paper Subheader and Back Link */
.paper-subheader {
    margin-top: 4.5rem; /* space for fixed header */
    padding: 0.85rem 0;
    background: rgba(255, 255, 255, 0.45);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.paper-subheader .container {
    display: flex;
    align-items: center;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 550;
    transition: var(--transition-fast);
}

.back-link:hover {
    color: var(--accent-primary);
    transform: translateX(-2px);
}