:root{
  --teal:#0d7d6e;
  --teal-dark:#095c51;
  --teal-deep:#063e37;
  --lime:#7cb342;
  --amber:#f0a500;
  --ocean:#0f3a52;
  --bg:#eef3f1;
  --card:#ffffff;
  --text:#1c2b29;
  --muted:#5d6f6b;
  --line:#dde7e3;
  --sidebar-w:264px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:'Manrope', system-ui, sans-serif;
  color:var(--text);background:var(--bg);line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
.head-font{font-family:'Fraunces', Georgia, serif;}

/* ===== Layout: sidebar + content ===== */
.layout{display:flex;min-height:100vh;}

/* Sidebar */
.sidebar{
  width:var(--sidebar-w);flex-shrink:0;
  background:linear-gradient(165deg,var(--teal-dark) 0%,var(--teal-deep) 100%);
  color:#dcefe9;position:fixed;top:0;bottom:0;left:0;
  display:flex;flex-direction:column;padding:30px 22px;z-index:60;
  overflow-y:auto;
}
.sb-brand{display:flex;align-items:center;gap:13px;text-decoration:none;color:#fff;margin-bottom:38px;}
.sb-globe{
  width:46px;height:46px;flex-shrink:0;border-radius:14px;
  background:linear-gradient(135deg,var(--lime),var(--amber));
  display:flex;align-items:center;justify-content:center;font-size:24px;
  box-shadow:0 6px 16px rgba(0,0,0,.25);
}
.sb-brand b{font-family:'Fraunces',serif;font-size:19px;line-height:1.15;display:block;font-weight:600;}
.sb-brand small{font-size:12px;color:#8fd3c4;letter-spacing:.5px;}
.sb-nav{display:flex;flex-direction:column;gap:6px;flex:1;}
.sb-nav a{
  display:flex;align-items:center;gap:12px;
  color:#bfe6dd;text-decoration:none;font-weight:600;font-size:15px;
  padding:13px 16px;border-radius:11px;transition:.2s;
}
.sb-nav a .ic{width:20px;height:20px;flex-shrink:0;opacity:.85;}
.sb-nav a:hover{background:rgba(255,255,255,.09);color:#fff;}
.sb-nav a.active{background:#fff;color:var(--teal-dark);box-shadow:0 6px 16px rgba(0,0,0,.18);}
.sb-foot{font-size:12px;color:#7cc3b5;margin-top:24px;line-height:1.6;border-top:1px solid rgba(255,255,255,.12);padding-top:18px;}

/* Topbar (mobile) */
.mobilebar{
  display:none;position:sticky;top:0;z-index:55;
  background:var(--teal-dark);color:#fff;padding:0 18px;height:60px;
  align-items:center;justify-content:space-between;
}
.mobilebar .mb-brand{display:flex;align-items:center;gap:10px;font-family:'Fraunces',serif;font-size:17px;color:#fff;text-decoration:none;}
.mobilebar .mb-globe{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--lime),var(--amber));display:flex;align-items:center;justify-content:center;font-size:18px;}
.mb-burger{background:none;border:none;cursor:pointer;display:flex;flex-direction:column;gap:5px;padding:6px;}
.mb-burger span{width:26px;height:2px;background:#fff;border-radius:2px;}

/* Content area */
.content{margin-left:var(--sidebar-w);flex:1;min-width:0;}

/* Hero / page banner */
.banner{
  position:relative;color:#fff;overflow:hidden;
  background:linear-gradient(120deg,var(--ocean) 0%,var(--teal) 100%);
  padding:74px 56px 80px;
}
.banner::after{
  content:"";position:absolute;right:-80px;top:-80px;width:380px;height:380px;border-radius:50%;
  background:radial-gradient(circle,rgba(124,179,66,.30),transparent 70%);
}
.banner::before{
  content:"";position:absolute;left:-60px;bottom:-100px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(240,165,0,.22),transparent 70%);
}
.banner-inner{position:relative;max-width:760px;z-index:2;}
.tag{display:inline-block;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);
  padding:6px 16px;border-radius:30px;font-size:13px;font-weight:600;letter-spacing:1px;margin-bottom:18px;}
.banner h1{font-family:'Fraunces',serif;font-weight:600;font-size:clamp(34px,5.5vw,60px);line-height:1.04;}
.banner p{font-size:clamp(16px,2vw,20px);color:#d7efe9;margin-top:18px;max-width:620px;}
.banner-cta{margin-top:28px;display:flex;gap:14px;flex-wrap:wrap;}
.btn{display:inline-block;font-weight:700;font-size:15px;padding:13px 26px;border-radius:11px;
  text-decoration:none;cursor:pointer;transition:.2s;border:none;font-family:'Manrope',sans-serif;}
.btn-amber{background:var(--amber);color:#3a2900;}
.btn-amber:hover{background:#ffb71a;transform:translateY(-2px);}
.btn-line{background:rgba(255,255,255,.12);color:#fff;border:1.5px solid rgba(255,255,255,.45);}
.btn-line:hover{background:#fff;color:var(--teal-dark);}

/* Content sections */
.pad{padding:56px 56px;}
.maxc{max-width:1000px;}
.eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--teal);font-weight:800;
  font-size:13px;letter-spacing:1.5px;text-transform:uppercase;margin-bottom:10px;}
.eyebrow::before{content:"";width:26px;height:3px;background:var(--amber);border-radius:2px;}
.h2{font-family:'Fraunces',serif;font-size:clamp(26px,3.6vw,40px);color:var(--ocean);line-height:1.12;margin-bottom:20px;font-weight:600;}
.prose p{font-size:17px;color:#2d3e3a;margin-bottom:16px;}

/* Stat / feature cards */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:10px;}
.fcard{background:var(--card);border-radius:18px;padding:28px 24px;border:1px solid var(--line);
  box-shadow:0 8px 22px rgba(13,125,110,.06);transition:.25s;position:relative;overflow:hidden;}
.fcard::before{content:"";position:absolute;left:0;top:0;width:100%;height:5px;
  background:linear-gradient(90deg,var(--teal),var(--lime));}
.fcard:hover{transform:translateY(-6px);box-shadow:0 18px 38px rgba(13,125,110,.16);}
.fcard .ico{width:50px;height:50px;border-radius:13px;background:#e6f5f1;color:var(--teal);
  display:flex;align-items:center;justify-content:center;font-family:'Fraunces',serif;font-size:24px;font-weight:700;margin-bottom:14px;}
.fcard h3{font-family:'Fraunces',serif;font-size:21px;color:var(--ocean);margin-bottom:8px;}
.fcard p{font-size:14.5px;color:var(--muted);}

/* Highlight band */
.band{background:linear-gradient(120deg,var(--teal-dark),var(--teal-deep));color:#eafaf6;
  border-radius:22px;padding:44px 46px;position:relative;overflow:hidden;}
.band::after{content:"";position:absolute;right:-50px;bottom:-60px;width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle,rgba(124,179,66,.25),transparent 70%);}
.band .q{font-family:'Fraunces',serif;font-size:clamp(19px,2.6vw,26px);font-style:italic;line-height:1.5;position:relative;z-index:2;}
.band .qa{margin-top:16px;color:var(--amber);font-weight:700;font-size:15px;position:relative;z-index:2;}

/* Map-style era list */
.eras{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.era{background:var(--card);border:1px solid var(--line);border-left:5px solid var(--teal);
  border-radius:0 14px 14px 0;padding:20px 22px;}
.era b{font-family:'Fraunces',serif;font-size:18px;color:var(--ocean);display:block;}
.era span{font-size:14px;color:var(--muted);}

/* Author */
.author-card{display:grid;grid-template-columns:300px 1fr;gap:40px;align-items:center;
  background:var(--card);border-radius:22px;padding:38px;border:1px solid var(--line);
  box-shadow:0 14px 36px rgba(13,125,110,.1);}
.author-card .photo{position:relative;}
.author-card .photo img{width:100%;border-radius:16px;display:block;}
.author-card .photo::after{content:"";position:absolute;inset:0;border-radius:16px;
  box-shadow:inset 0 0 0 4px rgba(240,165,0,.5);pointer-events:none;}
.author-card h2{font-family:'Fraunces',serif;font-size:32px;color:var(--ocean);line-height:1.1;}
.author-card .role{color:var(--teal);font-weight:700;font-size:17px;margin:6px 0 4px;}
.author-card .org{color:var(--muted);font-size:15px;margin-bottom:20px;}
.author-card .chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px;}
.chip{background:#e6f5f1;color:var(--teal-dark);font-size:13.5px;font-weight:600;padding:7px 14px;border-radius:30px;}
.author-card .bio{font-size:16px;color:#2d3e3a;}

/* Resources */
.res-list{display:flex;flex-direction:column;gap:14px;max-width:820px;}
.res{display:flex;align-items:center;gap:18px;background:var(--card);border:1px solid var(--line);
  border-radius:15px;padding:20px 24px;text-decoration:none;transition:.2s;}
.res:hover{border-color:var(--teal);transform:translateX(6px);box-shadow:0 12px 26px rgba(13,125,110,.12);}
.res .badge{flex-shrink:0;width:52px;height:52px;border-radius:13px;background:linear-gradient(135deg,var(--teal),var(--lime));
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px;}
.res h3{font-family:'Fraunces',serif;font-size:19px;color:var(--ocean);}
.res p{font-size:14px;color:var(--muted);margin-top:2px;}

/* Quiz */
.quiz-intro{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:38px;
  text-align:center;max-width:740px;margin:0 auto;box-shadow:0 10px 28px rgba(13,125,110,.08);}
.quiz-intro p{font-size:16.5px;color:#2d3e3a;margin-bottom:24px;}
.quiz{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:20px;}
.q-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px;
  border-top:4px solid var(--teal);}
.q-card h3{display:flex;gap:13px;align-items:flex-start;font-size:17px;font-weight:700;color:var(--ocean);margin-bottom:16px;line-height:1.5;font-family:'Manrope',sans-serif;}
.q-num{flex-shrink:0;width:32px;height:32px;border-radius:10px;background:var(--teal);color:#fff;
  font-weight:800;font-size:15px;display:flex;align-items:center;justify-content:center;}
.q-options{display:flex;flex-direction:column;gap:10px;}
.q-option{display:flex;align-items:center;gap:12px;padding:13px 16px;border:1.5px solid var(--line);
  border-radius:12px;cursor:pointer;transition:.15s;background:#fafdfc;}
.q-option:hover{border-color:var(--teal);background:#eef8f5;}
.q-option input{accent-color:var(--teal);width:18px;height:18px;cursor:pointer;}
.opt-letter{flex-shrink:0;width:27px;height:27px;border-radius:8px;background:#e6f5f1;color:var(--teal-dark);
  font-weight:800;font-size:13px;display:flex;align-items:center;justify-content:center;}
.opt-text{font-size:15.5px;color:#27332f;}
.q-option.opt-correct{border-color:var(--lime);background:#eef8e4;}
.q-option.opt-correct .opt-letter{background:var(--lime);color:#fff;}
.q-option.opt-wrong{border-color:#e36a5b;background:#fdeeec;}
.q-option.opt-wrong .opt-letter{background:#e36a5b;color:#fff;}
.q-card.correct-card{border-top-color:var(--lime);}
.q-card.wrong-card{border-top-color:#e36a5b;}
.quiz-actions{display:flex;gap:14px;justify-content:center;margin-top:30px;flex-wrap:wrap;}

.result{max-width:540px;margin:32px auto 0;background:linear-gradient(120deg,var(--teal-dark),var(--teal-deep));
  color:#eafaf6;border-radius:20px;padding:40px;text-align:center;box-shadow:0 16px 36px rgba(13,125,110,.22);}
.result h2{font-family:'Fraunces',serif;font-size:28px;color:#fff;margin-bottom:8px;}
.result .pct{font-family:'Fraunces',serif;font-size:68px;font-weight:600;line-height:1;color:var(--amber);margin-bottom:12px;}
.result .line{font-size:16px;color:#d7efe9;margin-bottom:5px;}
.result .grade{font-size:20px;margin-top:14px;color:#fff;font-weight:700;}
.result .note{font-size:13px;color:#9fd3c7;margin-top:16px;}

/* Footer */
.foot{background:var(--ocean);color:#9fc4d0;text-align:center;padding:34px 26px;}
.foot b{color:#fff;font-family:'Fraunces',serif;}

/* Responsive */
@media(max-width:980px){
  .grid3{grid-template-columns:1fr;}
  .eras{grid-template-columns:1fr;}
  .author-card{grid-template-columns:1fr;text-align:center;}
  .author-card .photo{max-width:280px;margin:0 auto;}
  .author-card .chips{justify-content:center;}
  .pad{padding:42px 28px;}
  .banner{padding:56px 28px 60px;}
}
@media(max-width:820px){
  .sidebar{transform:translateX(-100%);transition:transform .3s;box-shadow:6px 0 30px rgba(0,0,0,.3);}
  .sidebar.open{transform:translateX(0);}
  .content{margin-left:0;}
  .mobilebar{display:flex;}
}