:root{
  --ink:#14213a;
  --ink-2:#22314f;
  --paper:#f7f3ec;
  --paper-2:#efe8dc;
  --text:#1f2430;
  --muted:#5b6170;
  --accent:#b3263e;
  --line:#ddd4c4;
  --serif:"EB Garamond",Georgia,"Times New Roman",serif;
  --sans:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--text);font-family:var(--sans);font-size:17px;line-height:1.65}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent)}
h1,h2,h3{font-family:var(--serif);font-weight:500;color:var(--ink);line-height:1.15;margin:0 0 .5em}
h2{font-size:clamp(1.9rem,5vw,2.6rem)}
h3{font-size:1.3rem}
p{margin:0 0 1em}

/* top bar */
.topbar{position:sticky;top:0;z-index:10;background:rgba(20,33,58,.97);color:#fff;
  display:flex;align-items:center;gap:1rem;padding:.6rem 1.25rem;padding-top:max(.6rem,env(safe-area-inset-top))}
.brand{font-family:var(--serif);font-size:1.15rem;color:#fff;text-decoration:none;white-space:nowrap}
.nav{display:flex;gap:1.1rem;overflow-x:auto;scrollbar-width:none;margin-left:auto;-webkit-overflow-scrolling:touch}
.nav::-webkit-scrollbar{display:none}
.nav a{color:#d9deea;text-decoration:none;font-size:.88rem;white-space:nowrap;padding:.35rem 0}
.nav a:hover{color:#fff}
@media (max-width:720px){
  .topbar{flex-wrap:wrap;gap:.2rem .5rem;padding:.5rem 1rem}
  .brand{flex:1}
  .topbar .lang{order:2}
  .nav{order:3;width:100%;margin-left:0;gap:1.2rem}
}

/* layout */
.section{padding:clamp(3.5rem,9vw,6rem) 1.25rem;scroll-margin-top:70px}
.section.alt{background:var(--paper-2)}
.section.dark{background:var(--ink);color:#e7ebf3}
.section.dark h2,.section.dark h3{color:#fff}
.wrap{max-width:1080px;margin:0 auto}
.narrow{max-width:720px}
.narrow-text{max-width:720px}
.eyebrow{font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:.8rem}
.section.dark .eyebrow{color:#f0a3b0}
.lead{font-family:var(--serif);font-size:1.4rem;line-height:1.45;color:var(--ink)}
.section.dark .lead{color:#fff}

/* hero */
.hero{background:linear-gradient(180deg,var(--ink) 0%,var(--ink-2) 100%);color:#fff;padding:clamp(3rem,8vw,6rem) 1.25rem}
.hero-inner{max-width:1080px;margin:0 auto;display:grid;grid-template-columns:minmax(0,320px) 1fr;gap:clamp(2rem,6vw,4.5rem);align-items:center}
.hero h1{color:#fff;font-size:clamp(2.6rem,8vw,4.4rem);margin-bottom:.25em}
.hero .eyebrow{color:#f0a3b0}
.subtitle{font-family:var(--serif);font-style:italic;font-size:clamp(1.25rem,3.4vw,1.6rem);color:#d9deea;margin-bottom:1.4em}
.tagline{font-family:var(--serif);font-size:1.2rem;border-left:3px solid var(--accent);padding-left:1rem;color:#fff;max-width:34em}
.cta{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.8rem}

/* typographic cover */
.cover{position:relative;aspect-ratio:2/3;background:var(--paper);color:var(--ink);border-radius:3px;
  box-shadow:0 30px 60px rgba(0,0,0,.45),inset 6px 0 0 rgba(0,0,0,.08);
  padding:12% 10%;display:flex;flex-direction:column;overflow:hidden}
.cover-skyline{position:absolute;left:0;right:0;bottom:0;height:34%;background:var(--ink);
  clip-path:polygon(0 60%,6% 60%,6% 35%,12% 35%,12% 50%,18% 50%,18% 15%,22% 15%,22% 5%,25% 5%,25% 15%,29% 15%,29% 45%,36% 45%,36% 28%,42% 28%,42% 55%,48% 55%,48% 22%,53% 22%,53% 0,55% 0,55% 22%,60% 22%,60% 48%,67% 48%,67% 32%,73% 32%,73% 52%,80% 52%,80% 20%,86% 20%,86% 42%,93% 42%,93% 58%,100% 58%,100% 100%,0 100%)}
.cover-title{font-family:var(--serif);font-size:clamp(1.7rem,4vw,2.3rem);line-height:1.05;margin:0 0 .6rem}
.cover-sub{font-family:var(--serif);font-style:italic;font-size:1rem;line-height:1.3;color:var(--muted);margin:0}
.cover-author{position:absolute;left:10%;bottom:6%;z-index:1;color:#fff;font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;margin-bottom:0}
@media (max-width:720px){
  .hero-inner{grid-template-columns:1fr}
  .cover{width:62%;max-width:240px;margin:0 auto;order:2}
}

/* buttons */
.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font-weight:500;font-size:.95rem;
  padding:.8rem 1.4rem;border-radius:999px;border:0;cursor:pointer;font-family:var(--sans)}
.btn:hover{filter:brightness(1.08)}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.55)}
.btn-light{background:#fff;color:var(--ink);margin-top:2rem}

/* readers */
.readers{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem;margin-top:2.2rem}
.readers div{border-top:2px solid var(--accent);padding-top:1rem}
.readers h3{font-size:1.15rem}
.readers p{font-size:.95rem;color:var(--muted);margin:0}
@media (max-width:720px){.readers{grid-template-columns:1fr}}

/* toc */
.toc{list-style:none;padding:0;margin:1.5rem 0 0;counter-reset:none}
.toc li{font-family:var(--serif);font-size:1.15rem;padding:.7rem 0;border-bottom:1px solid var(--line);display:flex;gap:1rem;color:var(--ink)}
.toc li span{flex:0 0 2rem;color:var(--accent);font-family:var(--sans);font-size:.85rem;padding-top:.25rem}
.toc li.toc-front{font-style:italic;color:var(--muted);padding-left:3rem}

/* excerpt */
.excerpt{font-family:var(--serif);font-size:1.22rem;line-height:1.6}
.excerpt p:first-child::first-letter{float:left;font-size:3.6em;line-height:.85;padding:.06em .1em 0 0;color:var(--accent)}
.excerpt .quote{font-style:italic;color:var(--ink);padding-left:1.2rem;border-left:3px solid var(--accent)}

/* lecture cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:1.25rem;margin-top:2rem}
.card{background:var(--ink-2);border:1px solid rgba(255,255,255,.08);border-radius:8px;padding:1.5rem}
.card h3{font-size:1.3rem}
.card p{color:#c7cedd;font-size:.97rem;margin:0}

/* about */
.about{display:grid;grid-template-columns:minmax(0,380px) 1fr;gap:clamp(2rem,6vw,4rem);align-items:start}
.portrait{margin:0;position:sticky;top:90px}
.portrait img{border-radius:6px;box-shadow:0 20px 40px rgba(20,33,58,.18)}
.about-text h3{margin-top:1.6rem;font-size:1.35rem}
@media (max-width:720px){
  .about{grid-template-columns:1fr}
  .portrait{position:static;max-width:320px}
}

/* form */
.form{display:grid;gap:1rem;margin-top:1.5rem}
.form label{display:grid;gap:.35rem;font-size:.9rem;font-weight:500;color:var(--ink)}
.form .lbl{display:block}
.form .opt{font-weight:400;color:var(--muted)}
.form input,.form select,.form textarea{font:inherit;font-size:16px;font-weight:400;padding:.75rem .9rem;border:1px solid var(--line);
  border-radius:6px;background:#fff;color:var(--text);width:100%}
.form input:focus,.form select:focus,.form textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:transparent}
.form .btn{justify-self:start;padding:.85rem 2rem}
.hp{position:absolute;left:-9999px}

.footer{background:var(--ink);color:#aab3c5;text-align:center;font-size:.85rem;padding:2rem 1rem;padding-bottom:max(2rem,env(safe-area-inset-bottom))}
.footer p{margin:0}
.topbar .lang{order:3;font-size:.85rem;text-decoration:none;white-space:nowrap;color:#fff;border:1px solid rgba(255,255,255,.45);border-radius:999px;padding:.2rem .7rem}