/* ============================================================
   zachcahill.com  -  Ink / Gold design system
   Palette + type locked from Zach Cahill Sudbury Brand Kit.
   OSC-safe, editorial/authority feel.
   ============================================================ */
:root{
  --paper:#F5F3EE; --panel:#FFFFFF; --panel-2:#EFEBE2;
  --ink:#151A22; --ink-2:#26303B; --body:#333B47; --muted:#6E7683;
  --hair:#E3DFD4; --hair-2:#D5CFC2;
  --gold:#C9A227; --gold-deep:#9C7C16; --gold-soft:#F3E9C7;
  --ok:#3E7C4E;
  --serif:'Source Serif 4',Georgia,'Times New Roman',serif;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,Menlo,monospace;
  --maxw:1120px;
  --gutter:22px;
}
@media (prefers-color-scheme:dark){ :root:not([data-theme="light"]){
  --paper:#0F141B; --panel:#161D27; --panel-2:#1C2531;
  --ink:#F3F0E9; --ink-2:#E4E0D6; --body:#C6CCD4; --muted:#8A95A1;
  --hair:#28313D; --hair-2:#37424F;
  --gold:#E0BC4B; --gold-deep:#C9A227; --gold-soft:#2A2413;
}}
:root[data-theme="dark"]{
  --paper:#0F141B; --panel:#161D27; --panel-2:#1C2531;
  --ink:#F3F0E9; --ink-2:#E4E0D6; --body:#C6CCD4; --muted:#8A95A1;
  --hair:#28313D; --hair-2:#37424F;
  --gold:#E0BC4B; --gold-deep:#C9A227; --gold-soft:#2A2413;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--paper);color:var(--body);
  font-family:var(--sans);font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
h1,h2,h3,h4{font-family:var(--serif);color:var(--ink);margin:0;line-height:1.12;
  letter-spacing:-.01em;font-weight:600;text-wrap:balance}
p{margin:0 0 1em}
a{color:var(--gold-deep)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--gold-deep);font-weight:600;margin:0 0 12px}
.lede{font-family:var(--serif);font-size:clamp(19px,2.3vw,25px);line-height:1.5;color:var(--ink-2)}
.tnum{font-variant-numeric:tabular-nums}
.center{text-align:center}
.muted{color:var(--muted)}

/* ---------- nav ---------- */
nav.top{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--paper) 90%,transparent);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--hair)}
nav.top .row{max-width:var(--maxw);margin:0 auto;padding:13px var(--gutter);
  display:flex;align-items:center;gap:20px}
nav.top .brand{font-family:var(--serif);font-weight:600;letter-spacing:.14em;font-size:16px;
  color:var(--ink);white-space:nowrap;text-decoration:none}
nav.top .brand .sub{font-family:var(--mono);font-size:9.5px;letter-spacing:.22em;color:var(--muted);
  display:block;margin-top:2px;font-weight:500}
nav.top .links{display:flex;gap:2px;flex-wrap:wrap;margin-left:auto;align-items:center}
nav.top .links a{font-size:14px;color:var(--ink-2);text-decoration:none;padding:7px 11px;border-radius:7px;
  white-space:nowrap}
nav.top .links a:hover{background:var(--panel-2);color:var(--ink)}
nav.top .links a.cta{background:var(--ink);color:#fff;margin-left:6px}
nav.top .links a.cta:hover{background:var(--gold-deep)}
.navtoggle{display:none;margin-left:auto;background:none;border:1px solid var(--hair);border-radius:8px;
  padding:8px 10px;color:var(--ink);font-size:16px;cursor:pointer}
@media(max-width:900px){
  nav.top .links{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;
    align-items:stretch;background:var(--paper);border-bottom:1px solid var(--hair);padding:8px var(--gutter) 14px}
  nav.top .links.open{display:flex}
  nav.top .links a{padding:11px 10px}
  nav.top .links a.cta{margin-left:0;text-align:center;margin-top:6px}
  .navtoggle{display:block}
}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--sans);font-weight:600;font-size:15px;
  text-decoration:none;padding:13px 22px;border-radius:10px;border:1px solid transparent;cursor:pointer;
  transition:background-color .15s,border-color .15s,color .15s}
.btn-gold{background:var(--gold);color:#1a1405;border-color:var(--gold)}
.btn-gold:hover{background:var(--gold-deep);border-color:var(--gold-deep);color:#fff}
.btn-ink{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn-ink:hover{background:#000}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--hair-2)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold-deep)}
.hero .btn-ghost{color:#fff;border-color:rgba(255,255,255,.45)}
.hero .btn-ghost:hover{color:var(--gold);border-color:var(--gold)}
.btn.disabled,.btn[aria-disabled="true"]{opacity:.55;pointer-events:none;background:var(--panel-2);
  color:var(--muted);border-color:var(--hair)}
.btnrow{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}

/* ---------- TODO placeholder badge ---------- */
.todo{display:inline-block;font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;
  background:repeating-linear-gradient(45deg,#fff6d6,#fff6d6 7px,#ffeeb0 7px,#ffeeb0 14px);
  color:#8a6d00;border:1px dashed #d9b84a;border-radius:6px;padding:2px 7px;vertical-align:middle;
  text-transform:uppercase;font-weight:600}
:root[data-theme="dark"] .todo,:root:not([data-theme="light"]) .todo{
  background:repeating-linear-gradient(45deg,#2a2413,#2a2413 7px,#332b16 7px,#332b16 14px);color:#e0bc4b;border-color:#6b5a1f}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--ink);color:#F4F2EC;overflow:hidden}
.hero .bg{position:absolute;inset:0;background-size:cover;background-position:center 28%;
  background-image:linear-gradient(90deg,rgba(13,17,23,.92),rgba(13,17,23,.55)),var(--hero-img,none)}
.hero .inner{position:relative;max-width:var(--maxw);margin:0 auto;padding:84px var(--gutter) 70px}
.hero .kick{font-family:var(--mono);font-size:12.5px;letter-spacing:.26em;text-transform:uppercase;color:var(--gold)}
.hero h1{color:#fff;font-size:clamp(34px,5.6vw,60px);line-height:1.04;margin:18px 0 0;max-width:18ch}
.hero .sub{font-family:var(--serif);font-size:clamp(18px,2.2vw,22px);color:#D9DCE0;max-width:54ch;
  margin-top:20px;line-height:1.5}
.hero .btnrow{margin-top:30px}
.hero.simple .inner{padding:62px var(--gutter) 52px}

/* ---------- sections ---------- */
section{padding:66px 0}
section.tint{background:var(--panel-2)}
section.inkband{background:var(--ink);color:#e7eaee}
section.inkband h2,section.inkband h3{color:#fff}
.shead{margin-bottom:30px;max-width:64ch}
.shead h2{font-size:clamp(27px,3.6vw,40px)}
.shead .step{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--gold-deep);
  text-transform:uppercase;font-weight:600;margin-bottom:12px}
.shead p{font-size:17.5px;margin-top:12px}

/* ---------- router cards ---------- */
.cards{display:grid;gap:18px;margin-top:10px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:860px){.g3,.g4{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--panel);border:1px solid var(--hair);border-radius:16px;padding:26px;
  display:flex;flex-direction:column;gap:10px}
.card .ic{width:40px;height:40px;border-radius:10px;background:var(--gold-soft);color:var(--gold-deep);
  display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:4px}
.card h3{font-size:21px}
.card p{font-size:15.5px;margin:0}
.card .go{margin-top:auto;padding-top:10px}
.card .go a{font-family:var(--sans);font-weight:600;font-size:14.5px;text-decoration:none;color:var(--gold-deep)}
.card .go a:hover{color:var(--ink)}

/* ---------- stat tiles ---------- */
.tiles{display:grid;gap:14px;margin:22px 0}
.tile{background:var(--panel);border:1px solid var(--hair);border-radius:14px;padding:22px}
.tile .n{font-family:var(--serif);font-size:clamp(28px,3.4vw,38px);color:var(--ink);line-height:1;
  letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.tile .n.gold{color:var(--gold-deep)}
.tile .k{font-family:var(--mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase;
  color:var(--muted);margin-top:10px}
.tile .src{font-family:var(--mono);font-size:10px;color:var(--muted);margin-top:8px;letter-spacing:.02em;opacity:.85}

/* ---------- steps / process ---------- */
.flow{display:flex;flex-wrap:wrap;gap:12px;margin:18px 0}
.flow .s{flex:1;min-width:180px;background:var(--panel);border:1px solid var(--hair);border-radius:12px;padding:18px}
.flow .s .no{font-family:var(--mono);color:var(--gold-deep);font-weight:600;font-size:12px}
.flow .s h4{font-size:17px;margin:7px 0 5px}
.flow .s p{font-size:14.5px;margin:0}

/* ---------- clean list ---------- */
ul.clean{list-style:none;padding:0;margin:14px 0;display:flex;flex-direction:column;gap:10px}
ul.clean li{position:relative;padding-left:24px;font-size:16px}
ul.clean li::before{content:"";position:absolute;left:3px;top:10px;width:8px;height:8px;border-radius:2px;background:var(--gold)}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--hair);margin-top:20px}
.faq details{border-bottom:1px solid var(--hair);padding:4px 0}
.faq summary{cursor:pointer;list-style:none;padding:16px 2px;font-family:var(--serif);font-size:19px;
  color:var(--ink);display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--gold-deep);font-family:var(--sans);font-weight:600}
.faq details[open] summary::after{content:"\2212"}
.faq details p{padding:0 2px 16px;margin:0;font-size:15.5px}

/* ---------- CTA band ---------- */
.band{background:var(--ink);color:#eef1f4;border-radius:20px;padding:40px;margin:0 auto;
  display:flex;flex-wrap:wrap;gap:22px 40px;align-items:center;justify-content:space-between}
.band h3{color:#fff;font-size:26px;max-width:22ch}
.band p{color:#c7cdd5;margin:8px 0 0;max-width:46ch}

/* ---------- article ---------- */
.article{max-width:720px;margin:0 auto}
.article .meta{font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.04em;margin-bottom:10px}
.article h1{font-size:clamp(30px,4.4vw,44px);margin-bottom:8px}
.article h2{font-size:26px;margin:36px 0 10px}
.article p,.article li{font-size:18px;line-height:1.7}
.article .src{font-family:var(--mono);font-size:12px;color:var(--muted);border-left:3px solid var(--gold);
  padding:4px 0 4px 14px;margin:20px 0}

/* learn index cards */
.posts{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:10px}
@media(max-width:700px){.posts{grid-template-columns:1fr}}
.post{background:var(--panel);border:1px solid var(--hair);border-radius:14px;padding:22px;text-decoration:none;
  display:flex;flex-direction:column;gap:8px}
.post:hover{border-color:var(--gold)}
.post .cat{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--gold-deep);font-weight:600}
.post h3{font-size:20px;color:var(--ink)}
.post p{font-size:15px;color:var(--body);margin:0}

/* two-column */
.two{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:start}
@media(max-width:860px){.two{grid-template-columns:1fr;gap:26px}}
.imgcard{border-radius:16px;overflow:hidden;border:1px solid var(--hair);background:var(--panel-2)}
.imgcard img{width:100%;height:auto}
.phold{aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;background:
  repeating-linear-gradient(45deg,var(--panel-2),var(--panel-2) 12px,var(--panel) 12px,var(--panel) 24px);
  color:var(--muted);font-family:var(--mono);font-size:12px;text-align:center;padding:16px}

/* ---------- disclaimer + footer ---------- */
.disclaimer{background:var(--panel-2);border-top:1px solid var(--hair)}
.disclaimer .wrap{padding:22px var(--gutter)}
.disclaimer p{font-size:13px;color:var(--muted);margin:0;max-width:90ch;line-height:1.65}
footer{background:var(--ink);color:#aeb6bf;padding:48px 0 40px}
footer a{color:#d7dbe0;text-decoration:none}
footer a:hover{color:var(--gold)}
footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
@media(max-width:760px){footer .cols{grid-template-columns:1fr;gap:26px}}
footer .brand{font-family:var(--serif);letter-spacing:.14em;font-size:18px;color:#fff}
footer .brand .sub{font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;color:#8a95a1;display:block;margin-top:4px}
footer h5{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:#8a95a1;margin:0 0 12px;font-weight:600}
footer ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:9px;font-size:14.5px}
footer .legal{border-top:1px solid #2a333f;margin-top:34px;padding-top:20px;font-size:12.5px;color:#8a95a1;
  display:flex;flex-wrap:wrap;gap:6px 18px;justify-content:space-between}
footer .legal .c{line-height:1.7;max-width:70ch}