:root{
  --g1:#F5C518;--g2:#E8900A;--g3:#C47902;--g4:#8B5E00;
  --cream:#FFFDF0;--al:#FFF8E1;--am:#FFE9A0;
  --white:#FFFFFF;--text:#1A1000;--text2:#5A3800;--text3:#9B6C14;
  --red:#DC3545;--or:#E65100;--gr:#2E7D32;--bl:#1565C0;--pu:#6A1B9A;--cy:#00838F;
  --bd:rgba(228,181,50,.45);
  --sh:0 4px 24px rgba(196,121,2,.13);
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;font-size:15px;}
body{font-family:'Segoe UI',-apple-system,sans-serif;background:var(--cream);color:var(--text);line-height:1.72;text-rendering:optimizeLegibility;}

/* Emergency single-image mode: always render one static visual first */
body.single-image-mode > *{display:none !important;}
body.single-image-mode .single-image-page{display:flex !important;}
.single-image-page{
  display:none;
  min-height:100vh;
  width:100%;
  align-items:center;
  justify-content:center;
  padding:22px;
  background:linear-gradient(160deg,#050200,#1A0C00 50%,#3D1F00);
}
.single-image-page img{
  width:min(1200px,100%);
  height:auto;
  border-radius:14px;
  border:2px solid rgba(245,197,24,.55);
  box-shadow:0 12px 40px rgba(0,0,0,.45);
}

/* NAV */
nav{position:fixed;top:0;width:100%;z-index:999;
  background:linear-gradient(135deg,#050200 0%,#1A0C00 50%,#050200 100%);
  border-bottom:2.5px solid var(--g1);
  box-shadow:0 3px 28px rgba(245,197,24,.4);backdrop-filter:blur(7px);}
.nw{display:flex;align-items:center;overflow-x:auto;scrollbar-width:none;padding:0 16px;}
.nw::-webkit-scrollbar{display:none;}
.nb{font-weight:900;font-size:.88rem;color:var(--g1);white-space:nowrap;
  padding:13px 16px 13px 0;border-right:1px solid rgba(245,197,24,.3);margin-right:4px;
  text-shadow:0 0 20px rgba(245,197,24,.55);letter-spacing:.3px;}
nav a{color:rgba(255,215,80,.84);text-decoration:none;padding:13px 10px;
  font-size:.76rem;font-weight:650;white-space:nowrap;transition:all .2s;letter-spacing:.22px;}
nav a:hover{color:var(--g1);background:rgba(245,197,24,.1);}

/* SECTIONS */
section{padding:96px 36px 68px;scroll-margin-top:54px;}
section:nth-child(even){background:var(--al);}
section:not(#home){border-top:1px solid rgba(196,121,2,.12);}

.sh{text-align:center;margin-bottom:50px;}
.sh h2{font-size:2rem;font-weight:900;
  background:linear-gradient(135deg,var(--g4),var(--g1),var(--g2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px;}
.sh p{color:var(--text2);font-size:.97rem;max-width:680px;margin:0 auto;}
.sh .badge{display:inline-block;padding:4px 14px;border-radius:20px;
  background:linear-gradient(135deg,var(--g3),var(--g1));color:#1A0800;
  font-size:.7rem;font-weight:700;margin-bottom:10px;letter-spacing:.5px;}

/* HERO */
#home{min-height:100vh;
  background:linear-gradient(150deg,#050200 0%,#1A0C00 20%,#3D1F00 45%,#8B5E00 72%,#E8900A 100%);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:100px 36px 72px;position:relative;overflow:hidden;}
#home::before{content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse 65% 55% at 50% 45%,rgba(245,197,24,.12) 0%,transparent 70%);}
.cr{position:absolute;opacity:.06;animation:fl 8s ease-in-out infinite;user-select:none;}
@keyframes fl{0%,100%{transform:translateY(0) rotate(0);}50%{transform:translateY(-20px) rotate(8deg);}}
.hs{font-size:.75rem;letter-spacing:4px;text-transform:uppercase;
  color:rgba(255,210,80,.7);margin-bottom:10px;position:relative;}
.ht{font-size:3rem;font-weight:900;color:var(--g1);line-height:1.1;margin-bottom:14px;
  position:relative;text-shadow:0 0 60px rgba(245,197,24,.4);}
.hd{font-size:1.1rem;color:rgba(255,235,170,.86);max-width:700px;margin:0 auto 36px;position:relative;}
.hb{display:inline-block;padding:14px 38px;
  background:linear-gradient(135deg,var(--g1),var(--g2));color:#1A0800;font-weight:800;
  font-size:.93rem;border-radius:50px;text-decoration:none;
  box-shadow:0 8px 32px rgba(245,197,24,.44);transition:all .3s;position:relative;}
.hb:hover{transform:translateY(-3px);box-shadow:0 16px 44px rgba(245,197,24,.6);}
.sg{display:grid;grid-template-columns:repeat(auto-fit,minmax(175px,1fr));
  gap:16px;max-width:1200px;width:100%;margin:52px auto 0;position:relative;}
.sc{background:rgba(255,255,255,.07);border:1px solid rgba(245,197,24,.35);
  border-radius:15px;padding:20px 16px;text-align:center;
  backdrop-filter:blur(12px);transition:transform .3s;}
.sc:hover{transform:translateY(-5px);}
.sv{font-size:1.55rem;font-weight:900;color:var(--g1);display:block;text-shadow:0 0 18px rgba(245,197,24,.4);}
.sl{font-size:.68rem;color:rgba(255,210,80,.68);text-transform:uppercase;letter-spacing:.5px;margin-top:4px;display:block;}
.st{font-size:.65rem;color:rgba(255,195,60,.52);margin-top:3px;display:block;}

/* CARDS */
.cg{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;max-width:1180px;margin:0 auto;}
.card{background:var(--white);border-radius:16px;padding:24px;box-shadow:var(--sh);
  border:1px solid var(--bd);transition:transform .3s,box-shadow .3s;}
.card:hover{transform:translateY(-5px);box-shadow:0 14px 44px rgba(196,121,2,.2);}
.ci{font-size:2.2rem;margin-bottom:10px;}
.card h3{font-size:1rem;font-weight:700;color:var(--g3);margin-bottom:8px;}
.card p{font-size:.85rem;color:var(--text2);line-height:1.74;}
.fb{background:linear-gradient(135deg,#FFF8E1,#FFFDE7);border:1px solid rgba(228,181,50,.55);
  border-radius:7px;padding:9px 13px;font-family:'Courier New',monospace;font-size:.77rem;
  color:#3D2200;margin-top:9px;overflow-x:auto;white-space:pre;}

/* HIGHLIGHT CARD */
.hcard{background:linear-gradient(135deg,#0D0800,#2A1500);color:rgba(255,220,100,.88);
  border-radius:18px;padding:32px;border:1px solid rgba(245,197,24,.3);margin-bottom:28px;}
.hcard h3{color:var(--g1);margin-bottom:14px;font-size:1.25rem;}
.hcard p{line-height:1.82;font-size:.9rem;margin-bottom:10px;}
.hcard ul{padding-left:18px;font-size:.87rem;line-height:2;}
.hcard li::marker{color:var(--g1);}

/* CHARTS GRID */
.cgr{display:grid;grid-template-columns:repeat(auto-fit,minmax(420px,1fr));
  gap:20px;max-width:1180px;margin:0 auto;}
.cc{background:var(--white);border-radius:16px;padding:24px;box-shadow:var(--sh);border:1px solid var(--bd);}
.ct{font-size:.92rem;font-weight:700;color:var(--g3);margin-bottom:13px;text-align:center;}

/* DESIGN REFRESH: clearer typography and cleaner data surfaces */
.card,.cc,.mc,.mech-card,.rg,.aic,.pc,.fs{background:#fffef8;}
.card,.cc,.mc,.mech-card,.rg,.aic,.pc,.fs,.tc{box-shadow:0 8px 28px rgba(56,34,0,.08);}
.sh p{font-size:1.02rem;line-height:1.78;max-width:760px;}
.card p,.md,.aic p,.ri,.callout,.mech-body{font-size:.9rem;line-height:1.82;}
.ct{font-size:1rem;letter-spacing:.2px;}
.tc{border:1px solid rgba(196,121,2,.2);}
thead th{font-size:.83rem;}
td{font-size:.86rem;line-height:1.68;}
.hcard p{font-size:.95rem;}
.hcard ul{line-height:1.9;}

/* TABLES */
.tc{overflow-x:auto;border-radius:12px;box-shadow:var(--sh);margin:26px auto;max-width:1100px;}
table{width:100%;border-collapse:collapse;background:var(--white);}
thead{background:linear-gradient(135deg,#1A0800,#4A2800);}
thead th{color:var(--g1);padding:12px 14px;text-align:left;font-size:.8rem;font-weight:700;letter-spacing:.25px;}
tbody tr:nth-child(even){background:var(--al);}
tbody tr:hover{background:rgba(245,197,24,.09);}
td{padding:10px 14px;font-size:.83rem;border-bottom:1px solid rgba(196,121,2,.09);color:var(--text);}
td:first-child{font-weight:600;color:var(--g3);}
.hlr{background:rgba(245,197,24,.15)!important;font-weight:600;}

/* MECHANISM CARDS */
.mg{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:20px;max-width:1180px;margin:0 auto;}
.mc{background:var(--white);border-radius:16px;padding:24px;box-shadow:var(--sh);border-left:5px solid;transition:transform .3s;}
.mc:hover{transform:translateY(-4px);}
.mc.cr2{border-left-color:var(--red);}
.mc.mj{border-left-color:var(--or);}
.mc.sg2{border-left-color:#F9A825;}
.mn{display:inline-flex;width:32px;height:32px;background:linear-gradient(135deg,var(--g3),var(--g1));
  color:#1A0800;border-radius:50%;align-items:center;justify-content:center;font-weight:900;font-size:.95rem;margin-bottom:9px;}
.mb2{display:inline-block;padding:2px 9px;border-radius:20px;font-size:.68rem;font-weight:700;margin-left:5px;vertical-align:middle;}
.bc{background:#FDECEA;color:var(--red);}
.bm{background:#FFF3E0;color:var(--or);}
.bs{background:#FFFDE7;color:#F57F17;}
.mt2{font-size:1.01rem;font-weight:700;color:var(--text);margin-bottom:7px;}
.md{font-size:.83rem;color:var(--text2);line-height:1.74;}

/* MECHANISM CARDS (detailed) */
.mech-card{background:var(--white);border-radius:18px;padding:0;box-shadow:var(--sh);border:1px solid var(--bd);
  margin:0 auto 20px;max-width:1180px;overflow:hidden;transition:box-shadow .3s;}
.mech-card:hover{box-shadow:0 12px 44px rgba(196,121,2,.22);}
.mech-card.crit{border-top:4px solid var(--red);}
.mech-card.major{border-top:4px solid var(--or);}
.mech-card.signif{border-top:4px solid #F9A825;}
.mech-header{display:flex;align-items:center;gap:16px;padding:18px 26px;
  background:linear-gradient(135deg,#FFF9F0,#FFFDE7);border-bottom:1px solid var(--bd);}
.mech-num{min-width:42px;height:42px;display:flex;align-items:center;justify-content:center;
  border-radius:50%;background:linear-gradient(135deg,var(--g3),var(--g1));
  color:#1A0800;font-weight:900;font-size:1.2rem;box-shadow:0 2px 8px rgba(196,121,2,.3);}
.mech-badge{display:inline-block;padding:3px 11px;border-radius:20px;font-size:.72rem;font-weight:700;}
.badge-crit{background:#FDECEA;color:var(--red);}
.badgeumaj{background:#FFF3E0;color:var(--or);}
.badge-sig{background:#FFFDE7;color:#F57F17;}
.mech-title{font-size:1.1rem;font-weight:800;color:var(--text);margin-top:4px;}
.mech-body{padding:22px 26px;font-size:.87rem;color:var(--text2);line-height:1.76;}
.mech-body p{margin-bottom:10px;}
.refs-block{margin-top:16px;border-radius:8px;overflow:hidden;}
.refs-block summary{cursor:pointer;background:rgba(245,197,24,.12);padding:8px 14px;
  font-size:.8rem;font-weight:700;color:var(--g3);user-select:none;border-radius:8px;}
.refs-block[open] summary{border-radius:8px 8px 0 0;}
.ref-list{list-style:none;background:rgba(255,252,240,.8);padding:14px 18px;border:1px solid var(--bd);
  border-top:0;border-radius:0 0 8px 8px;}
.ref-list li{font-size:.76rem;color:var(--text2);padding:4px 0;border-bottom:1px solid rgba(228,181,50,.2);line-height:1.5;}
.ref-list li:last-child{border-bottom:none;}

/* PHASES */
.pg{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;max-width:900px;margin:28px auto 0;}
.pc{background:var(--white);border-radius:16px;padding:22px;text-align:center;box-shadow:var(--sh);border:2px solid var(--bd);}
.pn{font-size:2.6rem;font-weight:900;
  background:linear-gradient(135deg,var(--g3),var(--g1));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}
.pt{font-weight:700;color:var(--text);margin:5px 0 4px;font-size:.95rem;}
.pp{font-size:.78rem;color:var(--text2);line-height:1.7;}

/* PROCESS FLOW */
.flow{display:flex;align-items:stretch;gap:0;max-width:1100px;margin:0 auto;flex-wrap:wrap;}
.fs{background:var(--white);border:2px solid var(--bd);border-radius:12px;
  padding:18px 14px;text-align:center;flex:1;min-width:140px;position:relative;box-shadow:var(--sh);}
.fa{display:flex;align-items:center;justify-content:center;color:var(--g2);font-size:1.6rem;padding:0 4px;font-weight:700;}
.fi{font-size:1.6rem;margin-bottom:6px;}
.ft{font-weight:700;font-size:.8rem;color:var(--g3);}
.fd{font-size:.72rem;color:var(--text2);margin-top:4px;line-height:1.5;}

/* ARGUMENT BLOCKS */
.ab{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:20px;max-width:1180px;margin:0 auto;}
.aic{background:var(--white);border-radius:14px;padding:22px;box-shadow:var(--sh);
  border:1px solid var(--bd);border-top:4px solid var(--g1);}
.aic h4{font-size:.95rem;font-weight:700;color:var(--g3);margin-bottom:8px;}
.aic p{font-size:.83rem;color:var(--text2);line-height:1.74;}
.aik{font-weight:700;color:var(--text);font-size:.83rem;}

/* DIAGNOSTIC BOX */
.db{background:linear-gradient(135deg,#080300,#1E1000);border-radius:18px;padding:38px;
  color:rgba(255,215,80,.86);max-width:900px;margin:0 auto;border:1px solid rgba(245,197,24,.25);}
.db h3{color:var(--g1);font-size:1.38rem;margin-bottom:16px;}
.db p{line-height:1.84;margin-bottom:13px;font-size:.91rem;}
.db strong{color:var(--g1);}

/* REFS */
.rg{background:var(--white);border-radius:12px;padding:20px;margin-bottom:16px;box-shadow:var(--sh);border:1px solid var(--bd);}
.rg h3{color:var(--g3);font-size:.92rem;font-weight:700;margin-bottom:12px;padding-bottom:6px;border-bottom:2px solid var(--bd);}
.ri{padding:6px 0;font-size:.8rem;color:var(--text2);border-bottom:1px solid rgba(196,121,2,.07);line-height:1.64;}
.ri:last-child{border-bottom:none;}
.doi{color:var(--g2);font-size:.74rem;}

/* FOOTER */
footer{background:linear-gradient(135deg,#080300,#1E1000);color:rgba(255,210,80,.6);
  text-align:center;padding:24px;font-size:.82rem;border-top:2px solid var(--g1);}

/* CALLOUT */
.callout{background:linear-gradient(135deg,#FFF8E1,#FFFDE7);border:2px solid var(--g1);
  border-radius:12px;padding:18px 22px;margin:22px auto;max-width:900px;
  font-size:.88rem;color:var(--text2);}
.callout strong{color:var(--g3);}

/* STACK DIAGRAM */
.stk{display:flex;flex-direction:column;max-width:480px;margin:0 auto;gap:3px;}
.sl2{border-radius:8px;padding:12px 18px;text-align:center;font-weight:600;font-size:.85rem;transition:transform .2s;}
.sl2:hover{transform:scaleX(1.03);}

/* RESPONSIVE */
@media(max-width:768px){
  .ht{font-size:2rem;}
  section{padding:82px 18px 52px;}
  .sh p{font-size:.95rem;}
  .card p,.md,.aic p,.ri,.callout,.mech-body{font-size:.86rem;}
  .cgr{grid-template-columns:1fr;}
  .pg{grid-template-columns:1fr;}
  .mg{grid-template-columns:1fr;}
  .flow{flex-direction:column;}
  .fa{transform:rotate(90deg);padding:4px 0;}
}