/* Reset and base styles */
* {
    box-sizing: border-box;
}

html {
    color-scheme: light dark;
    scrollbar-gutter: stable;
}

/* CSS Custom Properties for theming */
:root {
    --color-global-bg: #faf5ff;
    --color-global-text: #2d1b4e;
    --color-link: #9b4dca;
    --color-accent: #c850c0;
    --color-accent-2: #ff6b6b;
    --color-accent-3: #f093fb;
    --color-quote: #9b4dca;
    --color-border: rgba(200, 80, 192, 0.15);
    --color-card-bg: rgba(255, 255, 255, 0.7);
    --color-shadow: rgba(155, 77, 202, 0.1);
    --gradient-primary: linear-gradient(135deg, #c850c0 0%, #ff6b6b 50%, #f5a623 100%);
    --gradient-subtle: linear-gradient(135deg, rgba(200,80,192,0.08) 0%, rgba(255,107,107,0.05) 100%);
    --gradient-glow: radial-gradient(circle, rgba(200,80,192,0.15) 0%, transparent 70%);
    --nucleus-color: #c850c0;
    --electron-1: #ff6b6b;
    --electron-2: #f5a623;
    --electron-3: #4facfe;
}

[data-theme="dark"] {
    --color-global-bg: #1a0e2e;
    --color-global-text: #e8dff5;
    --color-link: #f093fb;
    --color-accent: #c850c0;
    --color-accent-2: #ff6b6b;
    --color-accent-3: #f093fb;
    --color-quote: #f093fb;
    --color-border: rgba(240, 147, 251, 0.15);
    --color-card-bg: rgba(42, 22, 72, 0.7);
    --color-shadow: rgba(0, 0, 0, 0.3);
    --gradient-primary: linear-gradient(135deg, #c850c0 0%, #ff6b6b 50%, #f5a623 100%);
    --gradient-subtle: linear-gradient(135deg, rgba(200,80,192,0.12) 0%, rgba(255,107,107,0.08) 100%);
    --gradient-glow: radial-gradient(circle, rgba(200,80,192,0.2) 0%, transparent 70%);
    --nucleus-color: #f093fb;
    --electron-1: #ff6b6b;
    --electron-2: #f5a623;
    --electron-3: #4facfe;
}

/* Base typography */
body {
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--color-global-bg);
    color: var(--color-global-text);
    overflow-x: hidden;
}

/* Particle canvas background */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* Organic blob decorations */
.blob {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    pointer-events: none;
    z-index: 0;
    animation: blobFloat 20s ease-in-out infinite;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #c850c0, #ff6b6b);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.blob-2 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, #f5a623, #ff6b6b);
    bottom: 20%;
    left: -80px;
    animation-delay: -7s;
    animation-duration: 25s;
}

.blob-3 {
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, #4facfe, #c850c0);
    top: 50%;
    right: -60px;
    animation-delay: -13s;
    animation-duration: 22s;
}

[data-theme="dark"] .blob { opacity: 0.15; }

@keyframes blobFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -40px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(15px, 35px) scale(1.02); }
}

/* Utility classes */
.bg-global-bg { background-color: var(--color-global-bg); }
.text-global-text { color: var(--color-global-text); }
.antialiased { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

/* Layout utilities */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-3 { gap: 0.75rem; }
.h-4 { height: 1rem; }
.w-4 { width: 1rem; }
.h-7 { height: 1.75rem; }
.w-7 { width: 1.75rem; }
.p-1 { padding: 0.25rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-8 { padding-left: 2rem; padding-right: 2rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-16 { margin-bottom: 4rem; }
.mx-auto { margin-left: auto; margin-right: auto; }
.max-w-3xl { max-width: 48rem; }
.text-center { text-align: center; }
.text-xl { font-size: 1.25rem; }
.text-sm { font-size: 0.875rem; }
.font-bold { font-weight: 700; }
.rounded-md { border-radius: 0.375rem; }
.border { border-width: 1px; }
.opacity-75 { opacity: 0.75; }

/* Theme toggle */
.theme-toggle-btn {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1000;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    color: var(--color-global-text);
    cursor: pointer;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 50%;
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 12px var(--color-shadow);
}

.theme-toggle-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 20px rgba(200, 80, 192, 0.3);
}

.sun-icon, .moon-icon {
    display: none;
    width: 1.1rem;
    height: 1.1rem;
}

[data-theme="light"] .moon-icon,
[data-theme="dark"] .sun-icon {
    display: block;
}

/* Main content sits above particles */
main {
    position: relative;
    z-index: 1;
}

/* Typography */
.title {
    font-size: 3.5rem;
    font-weight: 700;
    margin: 0;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.15;
    letter-spacing: -0.02em;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--color-global-text);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }

/* Links */
a {
    color: var(--color-link);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-accent-2);
    text-decoration: underline;
}

/* Lists */
.list-inline {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.list-inline li {
    display: inline-flex;
    align-items: center;
}

/* Authors and affiliations */
.authors {
    font-size: 1.125rem;
    font-weight: 500;
}

.affiliations img {
    max-height: 48px;
    width: auto;
}

/* Hero section */
#hero {
    padding-top: 5rem;
    padding-bottom: 2rem;
}

.hero-subtitle {
    font-size: 1.1rem;
    max-width: 36rem;
    margin: 0 auto 1.5rem;
    line-height: 1.5;
    opacity: 0.85;
}

/* Atom diagram in hero */
.atom-diagram {
    position: relative;
    width: 180px;
    height: 180px;
    margin: 2rem auto;
}

.nucleus {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    margin: -12px 0 0 -12px;
    border-radius: 50%;
    background: var(--gradient-primary);
    box-shadow: 0 0 30px rgba(200, 80, 192, 0.6), 0 0 60px rgba(200, 80, 192, 0.3);
    z-index: 2;
}

.orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    animation: orbitSpin linear infinite;
}

.orbit-1 {
    width: 100px;
    height: 100px;
    margin: -50px 0 0 -50px;
    animation-duration: 4s;
    transform: rotateX(70deg) rotateZ(0deg);
}

.orbit-2 {
    width: 130px;
    height: 130px;
    margin: -65px 0 0 -65px;
    animation-duration: 5.5s;
    animation-direction: reverse;
    transform: rotateX(70deg) rotateZ(60deg);
}

.orbit-3 {
    width: 160px;
    height: 160px;
    margin: -80px 0 0 -80px;
    animation-duration: 7s;
    transform: rotateX(70deg) rotateZ(120deg);
}

.electron {
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    top: -5px;
    left: 50%;
    margin-left: -5px;
    box-shadow: 0 0 12px currentColor;
}

.electron-1 { background: var(--electron-1); color: var(--electron-1); }
.electron-2 { background: var(--electron-2); color: var(--electron-2); }
.electron-3 { background: var(--electron-3); color: var(--electron-3); }

@keyframes orbitSpin {
    from { transform: rotateX(70deg) rotateZ(var(--start-angle, 0deg)); }
    to { transform: rotateX(70deg) rotateZ(calc(var(--start-angle, 0deg) + 360deg)); }
}

.orbit-1 { --start-angle: 0deg; }
.orbit-2 { --start-angle: 60deg; }
.orbit-3 { --start-angle: 120deg; }

/* Action buttons */
.action-buttons {
    display: flex;
    justify-content: center;
    margin: 2rem 0;
}

.nav {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-pills {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.nav-pills li {
    text-align: center;
}

.nav-pills a {
    display: block;
    padding: 1rem 1.5rem;
    text-decoration: none;
    color: var(--color-global-text);
    border-radius: 1rem;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    box-shadow: 0 2px 12px var(--color-shadow);
    backdrop-filter: blur(12px);
    transition: all 0.3s ease;
}

.nav-pills a:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(200, 80, 192, 0.25);
    border-color: var(--color-accent);
    text-decoration: none;
}

.nav-pills h4 {
    margin: 0.5rem 0 0 0;
    font-size: 1rem;
    font-weight: 600;
}

.nav-pills img {
    max-height: 60px;
    width: auto;
    margin-bottom: 0.5rem;
}

/* Icon masks */
.nav-pills .icon {
    display: inline-block;
    width: 48px;
    height: 48px;
    margin-bottom: 0.5rem;
}

.icon-github {
    background-color: currentColor;
    -webkit-mask-image: url('assets/github-mark.svg');
    mask-image: url('assets/github-mark.svg');
    -webkit-mask-size: contain;
    mask-size: contain;
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
}

/* Section styling with glass morphism */
section .prose {
    background: var(--color-card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--color-border);
    border-radius: 1.25rem;
    padding: 2rem 2.5rem;
    box-shadow: 0 4px 24px var(--color-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

section .prose:hover {
    box-shadow: 0 8px 32px rgba(200, 80, 192, 0.15);
}

/* Fade-in animation for sections */
section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Hero is always visible */
#hero {
    opacity: 1;
    transform: none;
}

/* Prose content */
.prose {
    max-width: none;
    color: var(--color-global-text);
}

.prose h2 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    border-bottom: 2px solid var(--color-border);
    padding-bottom: 0.5rem;
    margin-top: 0;
}

.prose h3 {
    color: var(--color-accent);
}

.prose p {
    margin-bottom: 1rem;
}

.prose ul, .prose ol {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

.prose li {
    margin-bottom: 0.5rem;
}

.prose li::marker {
    color: var(--color-accent);
}

.prose code {
    background-color: rgba(200, 80, 192, 0.08);
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    border: 1px solid var(--color-border);
}

.prose pre {
    background: var(--gradient-subtle);
    padding: 1rem;
    border-radius: 0.75rem;
    overflow-x: auto;
    border: 1px solid var(--color-border);
}

.prose pre code {
    background: none;
    padding: 0;
    border: none;
}

.prose blockquote {
    border-left: 4px solid var(--color-accent);
    padding-left: 1rem;
    margin: 1rem 0;
    font-style: italic;
    color: var(--color-quote);
}

.prose img {
    max-width: 100%;
    height: auto;
    border-radius: 0.75rem;
    margin: 1rem 0;
    box-shadow: 0 4px 20px var(--color-shadow);
}

.prose figcaption {
    font-size: 0.85rem;
    color: var(--color-accent);
    text-align: center;
    margin-top: 0.75rem;
    font-style: italic;
    opacity: 0.8;
}

/* Tables with gradient header */
.prose table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 1.5rem 0;
    border-radius: 0.75rem;
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.prose th {
    background: var(--gradient-primary);
    color: white;
    font-weight: 600;
    padding: 0.75rem 1rem;
    text-align: left;
    font-size: 0.9rem;
}

.prose td {
    padding: 0.65rem 1rem;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9rem;
}

.prose td:first-child,
.prose th:first-child {
    white-space: nowrap;
}

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

.prose tbody tr {
    transition: background 0.2s ease;
}

.prose tbody tr:hover {
    background: var(--gradient-subtle);
}

/* Coherence bar indicators in table */
.coherence-bar {
    display: inline-block;
    height: 6px;
    border-radius: 3px;
    background: var(--gradient-primary);
    margin-left: 0.5rem;
    vertical-align: middle;
    opacity: 0.7;
}

/* Section divider atoms */
.section-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin: 3rem 0;
    opacity: 0.4;
}

.divider-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gradient-primary);
}

.divider-dot:nth-child(2) { width: 6px; height: 6px; opacity: 0.7; }
.divider-dot:nth-child(1),
.divider-dot:nth-child(3) { width: 4px; height: 4px; opacity: 0.5; }

/* Citation styles */
.citation-box {
    margin-top: 1rem;
}

.bibtex-textarea {
    width: 100%;
    height: 10rem;
    background: var(--gradient-subtle);
    color: var(--color-global-text);
    border: 1px solid var(--color-border);
    border-radius: 0.75rem;
    padding: 1rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    resize: vertical;
}

/* Footer */
footer {
    position: relative;
    z-index: 1;
}

/* Scroll progress bar */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--gradient-primary);
    z-index: 9999;
    transition: width 0.1s linear;
}

/* Media queries */
@media (min-width: 640px) {
    .px-8 {
        padding-left: 2rem;
        padding-right: 2rem;
    }
}

@media (max-width: 640px) {
    .title {
        font-size: 2.5rem;
    }

    .list-inline {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-pills {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 1rem;
    }

    section .prose {
        padding: 1.5rem 1.25rem;
        border-radius: 1rem;
    }

    .blob {
        display: none;
    }

    .atom-diagram {
        width: 140px;
        height: 140px;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .blob,
    .orbit,
    .electron,
    section {
        animation: none !important;
        transition: none !important;
    }
    section { opacity: 1; transform: none; }
}