:root{--bg:#faf9f7;--bgw:#fff;--t:#1a1a1f;--ts:#52525a;--tm:#8e8e96;--a:#1a5276;--al:#2980b9;--w:#c0392b;--bd:#e4e2de;--bl:#edebe8;--fd:'Crimson Pro',Georgia,serif;--fb:'DM Sans','Helvetica Neue',sans-serif;--fm:'IBM Plex Mono',monospace}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:var(--fb);background:var(--bg);color:var(--t);line-height:1.72;-webkit-font-smoothing:antialiased}
.container{max-width:1060px;margin:0 auto;padding:0 2rem}
.narrow{max-width:720px}

/* Reveal animations */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1)}
.reveal.visible{opacity:1;transform:translateY(0)}
.rd1{transition-delay:.1s}.rd2{transition-delay:.2s}.rd3{transition-delay:.3s}

/* Top nav */
nav.topnav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(250,249,247,.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--bl);padding:.7rem 0}
nav.topnav .container{display:flex;justify-content:space-between;align-items:center;gap:2rem}
.nav-title{font-family:var(--fd);font-size:.95rem;font-weight:600;color:var(--a)}
.nav-title a{text-decoration:none;color:inherit}
.nav-links{display:flex;gap:1.4rem;align-items:center}
.nav-links a{color:var(--ts);text-decoration:none;font-size:.74rem;font-weight:500;letter-spacing:.04em;text-transform:uppercase;transition:color .3s}
.nav-links a:hover,.nav-links a.active{color:var(--a)}
.lang-switch{display:flex;gap:.4rem;border:1px solid var(--bd);border-radius:6px;padding:2px;font-family:var(--fm);font-size:.7rem}
.lang-switch button{background:none;border:0;padding:.25rem .55rem;cursor:pointer;color:var(--tm);border-radius:4px;font-family:inherit;font-size:inherit;letter-spacing:.05em}
.lang-switch button.active{background:var(--a);color:#fff}
@media(max-width:768px){.nav-links a:not(.lang-toggle){font-size:.65rem;gap:.8rem}.nav-links{gap:.7rem}}

/* Hero */
.hero{min-height:88vh;display:flex;align-items:center;background:var(--bgw);padding:6rem 0 4rem;border-bottom:1px solid var(--bd)}
.hero-content{display:grid;grid-template-columns:1fr 1fr;gap:5rem;align-items:center}
@media(max-width:900px){.hero-content{grid-template-columns:1fr;gap:2.5rem}}
.brand{font-family:var(--fm);font-size:.7rem;letter-spacing:.25em;text-transform:uppercase;color:var(--a);margin-bottom:1.5rem}
h1{font-family:var(--fd);font-size:clamp(2.4rem,5vw,3.6rem);font-weight:700;line-height:1.1;margin-bottom:1.5rem}
h1 em{font-style:italic;color:var(--a);font-weight:500}
.lead{font-size:1.1rem;color:var(--ts);line-height:1.8;margin-bottom:2rem}

/* Page header */
.page-header{padding:6rem 0 2rem;background:var(--bgw);border-bottom:1px solid var(--bd)}
.page-header .label{font-family:var(--fm);font-size:.7rem;letter-spacing:.22em;text-transform:uppercase;color:var(--a);margin-bottom:1rem}
.page-header h1{font-family:var(--fd);font-size:clamp(2rem,4.2vw,3rem);font-weight:700;line-height:1.2;margin-bottom:1.2rem}
.page-header .subtitle{font-size:1.05rem;color:var(--ts);max-width:760px;line-height:1.7}

/* Action cards */
.action-card{background:var(--bgw);border:1px solid var(--bd);border-radius:14px;padding:2rem;margin-bottom:1.2rem;transition:transform .25s,box-shadow .3s,border-color .3s;text-decoration:none;color:inherit;display:block}
.action-card:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.06);border-color:var(--a)}
.action-card .ac-tag{font-family:var(--fm);font-size:.68rem;letter-spacing:.18em;text-transform:uppercase;color:var(--a);margin-bottom:.6rem}
.action-card h2{font-family:var(--fd);font-size:1.5rem;font-weight:700;margin-bottom:.5rem;line-height:1.25}
.action-card p{font-size:.92rem;color:var(--ts);line-height:1.65}
.action-card .ac-arrow{margin-top:1rem;font-family:var(--fm);font-size:.78rem;color:var(--a);display:inline-flex;align-items:center;gap:.4rem;transition:gap .3s}
.action-card:hover .ac-arrow{gap:.6rem}

/* Paper sections (on individual paper pages) */
section.section{padding:3.5rem 0;border-bottom:1px solid var(--bl)}
section.section.white{background:var(--bgw)}
section.section h2{font-family:var(--fd);font-size:clamp(1.5rem,3vw,2rem);font-weight:700;margin-bottom:1rem;line-height:1.25}
section.section h3{font-family:var(--fd);font-size:1.3rem;font-weight:700;margin:2.5rem 0 .8rem}
section.section .lead-section{font-size:1rem;color:var(--ts);max-width:760px;margin-bottom:2rem;line-height:1.75}
.body-text{font-size:.98rem;color:var(--ts);line-height:1.75;max-width:760px;margin-bottom:1.4rem}
.body-text strong{color:var(--t);font-weight:600}

/* Stat cards */
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin:2rem 0}
@media(max-width:900px){.stat-row{grid-template-columns:repeat(2,1fr)}}
.stat-card{background:var(--bgw);border:1px solid var(--bd);border-radius:10px;padding:1.4rem 1.2rem}
.stat-card .b{font-family:var(--fd);font-size:1.9rem;font-weight:700;color:var(--a);line-height:1.1;margin-bottom:.4rem}
.stat-card .b .u{font-size:.65em;color:var(--tm);font-weight:400;margin-left:.1em}
.stat-card .d{font-size:.78rem;color:var(--ts);line-height:1.45}

/* Finding cards */
.fg{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem;margin:2rem 0}
@media(max-width:900px){.fg{grid-template-columns:1fr}}
.fc{background:var(--bgw);border:1px solid var(--bd);border-radius:10px;padding:1.4rem;border-left:3px solid var(--a)}
.fc .fn{font-family:var(--fm);font-size:.78rem;color:var(--a);letter-spacing:.05em;margin-bottom:.5rem}
.fc h5{font-family:var(--fd);font-size:1.1rem;font-weight:700;margin-bottom:.5rem;line-height:1.3}
.fc p{font-size:.88rem;color:var(--ts);line-height:1.65}

/* Top list */
.top-list{list-style:none;margin:1.5rem 0}
.top-item{display:flex;justify-content:space-between;align-items:center;padding:1.1rem 0;border-bottom:1px solid var(--bl)}
.top-item .ti-content h5{font-family:var(--fd);font-size:1.15rem;font-weight:700;margin-bottom:.2rem}
.top-item .ti-content p{font-size:.85rem;color:var(--ts);line-height:1.55}
.top-item .ti-pct{font-family:var(--fd);font-size:1.6rem;font-weight:700;color:var(--a);margin-left:1rem;flex-shrink:0}

/* Chart wrap */
.chart-wrap{background:var(--bgw);border:1px solid var(--bd);border-radius:12px;padding:1.4rem 1.2rem;margin:2rem 0}
.chart-hdr{margin-bottom:1rem;border-bottom:1px solid var(--bl);padding-bottom:.8rem}
.chart-hdr h4{font-family:var(--fd);font-size:1.1rem;font-weight:600;margin-bottom:.3rem}
.chart-hdr p{font-size:.82rem;color:var(--tm)}

/* Callout */
.callout{background:var(--bgw);border-left:4px solid var(--a);border-radius:0 8px 8px 0;padding:1.4rem 1.6rem;margin:2rem 0;max-width:760px}
.callout p{font-family:var(--fd);font-style:italic;font-size:1.1rem;color:var(--t);line-height:1.6;margin-bottom:.6rem}
.callout .src{font-family:var(--fm);font-size:.75rem;color:var(--tm)}

/* Publication card */
.pub-card{background:var(--bgw);border:1px solid var(--bd);border-radius:10px;padding:1.5rem;margin:2rem 0}
.pub-journal{font-family:var(--fm);font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;color:var(--a);margin-bottom:.5rem}
.pub-title{font-family:var(--fd);font-size:1.1rem;font-weight:600;line-height:1.4;margin-bottom:.4rem}
.pub-authors{font-size:.85rem;color:var(--ts);margin-bottom:.6rem}
.pub-link{font-family:var(--fm);font-size:.78rem;color:var(--a);text-decoration:none}

/* Two-column section */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:start}
@media(max-width:900px){.two-col{grid-template-columns:1fr;gap:1.5rem}}

/* Footer */
footer{padding:3rem 0;border-top:1px solid var(--bd);background:var(--bg);text-align:center}
footer p{font-size:.84rem;color:var(--ts);margin-bottom:.4rem}
footer a{color:var(--ts);text-decoration:none;border-bottom:1px solid var(--bd)}
footer a:hover{color:var(--a);border-bottom-color:var(--a)}
.footer-meta{margin-top:1.4rem;display:flex;gap:1.5rem;justify-content:center;flex-wrap:wrap}
.footer-meta a{color:var(--tm);font-size:.78rem;border:0;font-family:var(--fm);letter-spacing:.05em;text-transform:uppercase}

/* Tables */
table.data-table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:.88rem}
table.data-table th{text-align:left;font-family:var(--fb);font-weight:600;border-bottom:2px solid var(--a);padding:.7rem .6rem;color:var(--t)}
table.data-table td{padding:.6rem .6rem;border-bottom:1px solid var(--bl);color:var(--ts)}
table.data-table tr:hover td{background:var(--bg)}

/* Page anchor offset for fixed nav */
section[id]{scroll-margin-top:80px}