/* === Base === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#FFF5F5;--surface:#FFFFFF;--primary:#9B2C2C;--secondary:#C53030;
  --accent:#2C7A7B;--text:#2D1B1B;--muted:#A08080;--line:#E8D8D8;
  --heading-font:'Playfair Display',Georgia,serif;
  --body-font:'Inter','Segoe UI',sans-serif;
  --mono-font:'JetBrains Mono','Fira Code',monospace;
}
html{scroll-behavior:smooth}
body{font-family:var(--body-font);color:var(--text);background:var(--bg);line-height:1.8;font-size:1.05rem}
a{color:var(--accent);text-decoration:underline}
a:hover{color:var(--primary)}
img{max-width:100%;height:auto;display:block}

/* === Container === */
.container{max-width:900px;margin:0 auto;padding:0 1.5rem}

/* === Hero === */
.hero{position:relative;min-height:70vh;display:flex;align-items:center;justify-content:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;z-index:0}
.hero-overlay{position:absolute;inset:0;background:rgba(45,27,27,0.78);z-index:1}
.hero-content{position:relative;z-index:2;max-width:900px;padding:4rem 2rem;text-align:center;color:#fff}
.journal-badge{display:inline-block;background:var(--accent);color:#fff;padding:4px 16px;border-radius:20px;font-size:0.8rem;font-weight:600;letter-spacing:0.04em;margin-bottom:1.5rem;text-transform:uppercase}
.hero h1{font-family:var(--heading-font);font-size:2.2rem;font-weight:700;line-height:1.3;margin-bottom:1rem;color:#fff}
.hero-authors{font-size:1.1rem;font-weight:500;margin-bottom:0.3rem;opacity:0.95}
.hero-affiliation{font-size:0.9rem;opacity:0.8;margin-bottom:0.5rem}
.hero-meta{font-size:0.85rem;opacity:0.7;margin-bottom:1.5rem}
.hero-keywords{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:2rem}
.chip{display:inline-block;background:rgba(44,122,123,0.85);color:#fff;padding:4px 14px;border-radius:16px;font-size:0.78rem;font-weight:600;letter-spacing:0.02em}
.hero-actions{margin-top:1rem}
.btn{display:inline-block;background:var(--primary);color:#fff;padding:12px 28px;border-radius:8px;text-decoration:none;font-weight:600;font-size:0.95rem;transition:background 0.3s ease}
.btn:hover{background:var(--secondary);color:#fff}

/* === Sections === */
.content-section{padding:4rem 0}
.alt-bg{background:#fef0f0}
.content-section h2{font-family:var(--heading-font);font-size:1.8rem;color:var(--primary);margin-bottom:1.5rem;padding-bottom:0.5rem;border-bottom:2px solid var(--line)}
.content-section h3{font-family:var(--heading-font);font-size:1.3rem;color:var(--text);margin:1.5rem 0 0.8rem}
.content-section p{margin-bottom:1.2rem}

/* === Stat Row === */
.stat-row{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin-bottom:2rem}
.stat-card{background:var(--surface);border-radius:12px;padding:1.5rem;text-align:center;box-shadow:0 2px 12px rgba(0,0,0,0.06);border-top:4px solid var(--primary)}
.stat-value{font-family:var(--heading-font);font-size:2.5rem;font-weight:900;color:var(--primary);line-height:1.2}
.stat-label{font-size:0.85rem;color:var(--muted);margin-top:0.5rem;margin-bottom:0}

/* === Concept Card === */
.concept-card,.aim-card,.roles-card{background:var(--surface);border-radius:12px;padding:2rem;margin:1.5rem 0;box-shadow:0 2px 12px rgba(0,0,0,0.06)}
.concept-card{border-left:4px solid var(--accent)}
.aim-card{border-left:4px solid var(--primary);background:#fdf2f2}
.roles-card{border-left:4px solid var(--accent)}
.concept-card ul,.roles-card ul{list-style:none;padding:0}
.concept-card li,.roles-card li{padding:0.6rem 0;border-bottom:1px solid var(--line)}
.concept-card li:last-child,.roles-card li:last-child{border-bottom:none}

/* === Methods Grid === */
.methods-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;margin-top:1rem}
.method-card{background:var(--surface);border-radius:12px;padding:1.5rem;box-shadow:0 2px 12px rgba(0,0,0,0.06);transition:transform 0.2s ease,box-shadow 0.2s ease}
.method-card:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,0,0,0.1)}
.method-card h3{font-size:1rem;color:var(--primary);margin-bottom:0.5rem;margin-top:0}
.method-card p{font-size:0.9rem;color:var(--muted);margin-bottom:0}

/* === Figures === */
.paper-figure{background:var(--surface);border-radius:12px;padding:1rem;margin:2rem 0;box-shadow:0 2px 12px rgba(0,0,0,0.06);border:1px solid var(--line)}
.paper-figure img{border-radius:8px;width:100%}
.paper-figure figcaption{font-size:0.85rem;color:var(--muted);padding:0.8rem 0.5rem 0;line-height:1.6}

/* === Tables === */
.table-container{overflow-x:auto;margin:1.5rem 0}
table{width:100%;border-collapse:collapse;font-size:0.9rem}
caption{font-size:0.9rem;font-weight:600;color:var(--text);text-align:left;padding:0.5rem 0;margin-bottom:0.5rem}
th{background:var(--primary);color:#fff;padding:10px 14px;text-align:left;font-weight:600;font-size:0.85rem}
td{padding:10px 14px;border-bottom:1px solid var(--line)}
tr:nth-child(even) td{background:rgba(155,44,44,0.03)}
.mono{font-family:var(--mono-font);font-size:0.8rem;word-break:break-all}

/* === Key Finding === */
.key-finding{background:linear-gradient(135deg,rgba(44,122,123,0.08),rgba(44,122,123,0.02));border:2px solid var(--accent);border-radius:12px;padding:2rem;margin:1.5rem 0}
.key-finding h3{color:var(--accent);font-size:1rem;text-transform:uppercase;letter-spacing:0.06em;margin-top:0;margin-bottom:0.8rem}
.key-finding p{margin-bottom:0}

/* === Strategy Callout === */
.strategy-callout{background:var(--surface);border-left:4px solid var(--primary);border-radius:0 12px 12px 0;padding:1.5rem 2rem;margin:1.5rem 0;box-shadow:0 2px 12px rgba(0,0,0,0.06)}
.strategy-callout h4{color:var(--primary);margin-bottom:0.5rem;font-size:1.1rem}

/* === Conclusion Card === */
.conclusion-card{background:var(--surface);border-left:4px solid var(--accent);border-radius:0 12px 12px 0;padding:2rem;box-shadow:0 2px 12px rgba(0,0,0,0.06)}

/* === Supplementary Details === */
.supp-details{margin:0.5rem 0;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.supp-details summary{padding:12px 16px;font-weight:600;cursor:pointer;background:var(--surface);color:var(--text);font-size:0.95rem;list-style:none}
.supp-details summary::-webkit-details-marker{display:none}
.supp-details summary::before{content:"\25B6";display:inline-block;margin-right:8px;transition:transform 0.2s;font-size:0.7em}
.supp-details[open] summary::before{transform:rotate(90deg)}
.supp-details p,.supp-details ol{padding:12px 16px}

/* === References === */
.references-list{padding-left:2rem;font-size:0.82rem;color:var(--muted);line-height:1.7}
.references-list li{margin-bottom:0.4rem}

/* === Footer === */
.site-footer{padding:2rem 0;text-align:center;font-size:0.8rem;color:var(--muted);border-top:1px solid var(--line);background:var(--surface)}

/* === Reveal Animation === */
.reveal{opacity:0;transform:translateY(30px);transition:opacity 0.6s ease-out,transform 0.6s ease-out}
.reveal.visible{opacity:1;transform:translateY(0)}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* === Flecto Explanation UI === */
.flecto-note,.flecto-callout,.flecto-card,.flecto-panel{margin:1.2rem 0;border-radius:10px;padding:1.2rem 1.5rem;font-size:0.95rem;line-height:1.7}
.flecto-note::before,.flecto-callout::before,.flecto-card::before,.flecto-panel::before{content:"\1F916 AI explanation";font-size:0.7rem;font-weight:700;text-transform:uppercase;color:#60a5fa;letter-spacing:0.06em;display:block;margin-bottom:0.5em}
.flecto-note{background:rgba(44,122,123,0.06);border-left:3px solid var(--accent);font-size:0.9rem}
.flecto-callout{background:rgba(155,44,44,0.05);border:1px solid rgba(155,44,44,0.15);border-radius:10px}
.flecto-card{background:var(--surface);border:1px solid var(--line);box-shadow:0 2px 8px rgba(0,0,0,0.05)}
.flecto-card h4{color:var(--primary);margin:0.3rem 0 0.6rem;font-size:1rem}
.flecto-card ul{padding-left:1.2rem;margin:0.5rem 0}
.flecto-card li{margin-bottom:0.3rem}
.flecto-panel{background:var(--surface);border:1px solid var(--line);box-shadow:0 4px 16px rgba(0,0,0,0.06);padding:1.5rem 2rem}
.flecto-panel h4{color:var(--accent);margin:0.3rem 0 0.6rem;font-size:1.05rem}

/* === Responsive === */
@media(max-width:768px){
  .hero h1{font-size:1.6rem}
  .stat-row{grid-template-columns:1fr}
  .methods-grid{grid-template-columns:1fr}
  .content-section{padding:2.5rem 0}
  .hero-content{padding:3rem 1.5rem}
  .container{padding:0 1rem}
}