/* Plica shared shell — nav, footer, buttons, dark theme */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --white:#F8F6F1;--surface:#EFEDE6;--cream:#E8E4DA;--cream-mid:#E2DDD2;
  --ink:#1C1C1A;--muted:#6B6B63;--border:#CEC9BC;
  --night:#1A3A3A;--night-soft:#244F4F;--night-deep:#122929;
  --copper:#8B5E3C;--copper-bg:#F5EDE4;--copper-border:#D4A882;
  --green:#2E6B4F;--red:#9A3B3B;
  --serif:'DM Serif Display',Georgia,serif;
  --mono:'DM Mono',monospace;
  --sans:'DM Sans',system-ui,sans-serif;
}

html{scroll-behavior:smooth;}
body{font-family:var(--sans);background:var(--white);color:var(--ink);-webkit-font-smoothing:antialiased;overflow-x:hidden;}

a:focus-visible,button:focus-visible{outline:2px solid var(--night);outline-offset:2px;}

/* NAV */
nav{position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(248,246,241,0.96);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;padding:0 48px;height:60px;}
.nav-brand{font-family:var(--mono);font-size:13px;font-weight:500;
  color:var(--night);letter-spacing:0.18em;text-decoration:none;flex-shrink:0;}
.nav-links{display:flex;gap:28px;list-style:none;margin:0 auto 0 32px;}
.nav-links a{font-size:13px;color:var(--muted);text-decoration:none;
  letter-spacing:0.03em;transition:color 0.2s;}
.nav-links a:hover{color:var(--ink);}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-menu-btn{display:none;background:none;border:none;cursor:pointer;
  padding:8px;flex-direction:column;gap:5px;margin-left:auto;margin-right:10px;}
.nav-menu-btn span{display:block;width:22px;height:2px;background:var(--ink);border-radius:1px;}
.lang-switch{display:flex;border:1px solid var(--border);overflow:hidden;}
.lang-btn{font-family:var(--mono);font-size:11px;font-weight:500;
  padding:6px 11px;background:transparent;border:none;cursor:pointer;
  color:var(--muted);letter-spacing:0.06em;transition:all 0.15s;}
.lang-btn.active{background:var(--night);color:white;}
.lang-btn:hover:not(.active){background:var(--cream-mid);color:var(--ink);}
.nav-cta-sec{font-family:var(--mono);font-size:11px;font-weight:500;
  color:var(--night);border:1px solid var(--night);
  padding:8px 14px;text-decoration:none;letter-spacing:0.06em;
  white-space:nowrap;transition:all 0.2s;}
.nav-cta-sec:hover{background:var(--night);color:var(--white);}
.nav-cta{font-family:var(--mono);font-size:11px;font-weight:500;
  background:var(--copper);color:var(--white);
  padding:9px 18px;text-decoration:none;letter-spacing:0.08em;white-space:nowrap;
  transition:background 0.2s;}
.nav-cta:hover{background:#7A5234;}
.nav-cta--night{background:var(--night)!important;}
.nav-cta--night:hover{background:var(--night-soft)!important;}
.theme-btn{width:36px;height:36px;border-radius:50%;border:1px solid var(--border);
  background:var(--surface);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;transition:all 0.2s;flex-shrink:0;}
.theme-btn:hover{background:var(--cream);border-color:var(--night);}

/* BUTTONS */
.btn-primary{font-family:var(--mono);font-size:11px;font-weight:500;
  background:var(--night);color:var(--white);
  padding:14px 30px;text-decoration:none;letter-spacing:0.1em;transition:background 0.2s;}
.btn-primary:hover{background:var(--night-soft);}
.btn-copper{background:var(--copper);}
.btn-copper:hover{background:#7A5234;}
.btn-secondary{font-family:var(--mono);font-size:11px;font-weight:500;
  color:var(--night);border:1px solid var(--night);
  padding:13px 30px;text-decoration:none;letter-spacing:0.1em;transition:all 0.2s;}
.btn-secondary:hover{background:var(--night);color:var(--white);}

/* SHARED SECTION PRIMITIVES */
section{padding:72px 48px;}
.container{max-width:1040px;margin:0 auto;}
.alt{background:var(--surface);}
.s-tag{font-family:var(--mono);font-size:10px;color:var(--muted);
  letter-spacing:0.18em;text-transform:uppercase;margin-bottom:16px;
  display:flex;align-items:center;gap:10px;}
.s-tag::before{content:'';width:20px;height:1px;background:var(--border);}
.s-title{font-family:var(--serif);font-size:clamp(26px,3vw,38px);
  line-height:1.12;color:var(--ink);margin-bottom:14px;}
.s-title em{font-style:italic;color:var(--night);}
.s-intro{font-size:16px;color:var(--muted);line-height:1.7;max-width:660px;margin-bottom:40px;}
.honest-box{background:var(--copper-bg);border-left:3px solid var(--copper);
  padding:28px 32px;max-width:760px;}
.honest-box p{font-size:15px;color:var(--ink);line-height:1.7;margin-bottom:10px;}
.honest-box p:last-child{margin-bottom:0;}
.honest-box strong{color:var(--copper);}
.honest-strip{margin-top:30px;padding:14px 18px;background:var(--copper-bg);
  border-left:3px solid var(--copper);font-size:13px;color:var(--ink);
  line-height:1.6;max-width:620px;}
.cta-band{background:var(--night);text-align:center;padding:72px 48px;}
.cta-band h2{font-family:var(--serif);font-size:clamp(26px,3vw,36px);
  color:var(--white);margin-bottom:14px;line-height:1.15;}
.cta-band h2 em{font-style:italic;color:var(--copper-border);}
.cta-band p{font-size:14px;color:rgba(255,255,255,0.6);margin-bottom:26px;
  font-family:var(--mono);letter-spacing:0.04em;}
.cta-band .btn-primary{background:var(--copper);}
.cta-band .btn-primary:hover{background:#7A5234;}

/* RICH FOOTER */
.rfoot{background:var(--night-deep);border-top:1px solid rgba(255,255,255,0.06);
  padding:56px 48px 28px;}
.rfoot-cols{max-width:1100px;margin:0 auto;
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
.rfoot-name{font-family:var(--mono);font-size:14px;font-weight:500;
  color:rgba(255,255,255,0.92);letter-spacing:0.16em;margin-bottom:12px;}
.rfoot-desc{font-size:12.5px;color:rgba(255,255,255,0.4);
  line-height:1.65;max-width:260px;margin-bottom:16px;}
.rfoot-tag{font-family:var(--mono);font-size:10px;color:var(--copper-border);letter-spacing:0.08em;}
.rfoot-head{font-family:var(--mono);font-size:10px;letter-spacing:0.14em;
  text-transform:uppercase;color:rgba(255,255,255,0.45);margin-bottom:14px;}
.rfoot-col a{display:block;font-size:13px;color:rgba(255,255,255,0.62);
  text-decoration:none;margin-bottom:9px;transition:color 0.15s;line-height:1.4;}
.rfoot-col a:hover{color:rgba(255,255,255,0.95);}
.rfoot-bottom{max-width:1100px;margin:40px auto 0;padding-top:20px;
  border-top:1px solid rgba(255,255,255,0.08);
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;}
.rfoot-bl,.rfoot-br{font-family:var(--mono);font-size:10.5px;color:rgba(255,255,255,0.35);}
.rfoot-br{color:rgba(255,255,255,0.3);}
.rfoot-disc{max-width:1100px;margin:18px auto 0;font-size:10.5px;
  color:rgba(255,255,255,0.28);line-height:1.6;}

/* EVIDENCE PACKET MOCK */
.packet-mock{max-width:820px;border:1px solid var(--border);background:var(--white);}
.packet-mock-head{background:var(--night);padding:14px 20px;
  display:flex;justify-content:space-between;align-items:center;}
.packet-mock-title{font-family:var(--mono);font-size:10px;color:rgba(255,255,255,0.85);
  letter-spacing:0.12em;text-transform:uppercase;}
.packet-mock-status{font-family:var(--mono);font-size:9px;color:var(--copper-border);
  letter-spacing:0.06em;}
.packet-mock-body{padding:0;}
.packet-row{display:grid;grid-template-columns:160px 1fr;gap:0;
  border-bottom:1px solid var(--border);font-size:12.5px;line-height:1.5;}
.packet-row:last-child{border-bottom:none;}
.packet-key{font-family:var(--mono);font-size:10px;color:var(--muted);
  padding:12px 16px;background:var(--surface);letter-spacing:0.04em;
  border-right:1px solid var(--border);}
.packet-val{font-family:var(--mono);font-size:11px;color:var(--ink);
  padding:12px 16px;word-break:break-all;}
.packet-val.warn{color:var(--copper);}
.packet-val.ok{color:var(--green);}
.packet-mock-cap{font-family:var(--mono);font-size:11px;color:var(--muted);
  margin-top:12px;letter-spacing:0.03em;}

/* DARK THEME */
html.dark{
  --white:#1A1A17;--surface:#222220;--cream:#2A2A27;--cream-mid:#313130;
  --ink:#E8E6E0;--muted:#9A9890;--border:#3A3A36;
  --night:#2A6666;--night-soft:#337777;--night-deep:#1A4444;
  --copper:#A07040;--copper-bg:#2A2218;--copper-border:#6A4A28;
  --green:#4A9A72;--red:#A07040;
}
html.dark nav{background:rgba(26,26,23,0.96)!important;}
html.dark .nav-links.open{background:rgba(26,26,23,0.98)!important;}
html.dark .contrast-col,html.dark .sig,html.dark .layer,html.dark .action,
html.dark .doc-cell,html.dark .zone,html.dark .build-row,html.dark .proves-col,
html.dark .packet-mock,html.dark .step{background:var(--surface);}
html.dark .uc-bar{background:var(--cream);}
html.dark .packet-key{background:var(--cream);}

@media(prefers-color-scheme:dark){
  html:not(.light):not(.dark){
    --white:#1A1A17;--surface:#222220;--cream:#2A2A27;--cream-mid:#313130;
    --ink:#E8E6E0;--muted:#9A9890;--border:#3A3A36;
    --night:#2A6666;--night-soft:#337777;--night-deep:#1A4444;
    --copper:#A07040;--copper-bg:#2A2218;--copper-border:#6A4A28;
    --green:#4A9A72;--red:#A07040;
  }
  html:not(.light):not(.dark) nav{background:rgba(26,26,23,0.96)!important;}
}

/* MOBILE */
@media(max-width:900px){
  nav{padding:0 16px;}
  .nav-menu-btn{display:flex;}
  .nav-links{display:none;position:fixed;top:60px;left:0;right:0;
    background:rgba(248,246,241,0.98);border-bottom:1px solid var(--border);
    flex-direction:column;padding:8px 20px 20px;gap:0;z-index:99;margin:0;
    backdrop-filter:blur(12px);}
  .nav-links.open{display:flex;}
  .nav-links li{width:100%;}
  .nav-links a{display:block;padding:14px 0;border-bottom:1px solid var(--border);font-size:14px;}
  .nav-cta-sec{display:none;}
}
@media(max-width:780px){.rfoot-cols{grid-template-columns:1fr 1fr;gap:28px;}}
@media(max-width:680px){section{padding:56px 24px;}}
@media(max-width:460px){.rfoot-cols{grid-template-columns:1fr;}}
@media(max-width:600px){.packet-row{grid-template-columns:1fr;}.packet-key{border-right:none;border-bottom:1px solid var(--border);}}