/* =====================================================================
   THE FOUNDER DIARY — design system
   Blue + yellow, banded, editorial. Ported from the Claude Design
   "Founder Diary Design System" project (one-pager.html).
   Palette: Paper #FCFBF7 · Ultramarine #2233B4 · Ink #18248A ·
            Deep #101A5E · Sun #F0C41B
   Type:    Archivo (display) · Schibsted Grotesk (body/numerals) ·
            DM Mono (labels)
   Structure: full-bleed bands, flush left, 2px ultramarine rules,
              zero radius everywhere structural, pills on controls only.
   ===================================================================== */

:root{
  /* blues */
  --fd-blue-100:#E4E7F7; --fd-blue-200:#BFC6EC; --fd-blue-300:#7E8AD4;
  --fd-blue-500:#2233B4; --fd-blue-700:#18248A; --fd-blue-900:#101A5E;
  /* yellows */
  --fd-yellow-200:#FAEBAF; --fd-yellow-500:#F0C41B; --fd-yellow-700:#7D6300;
  /* neutrals */
  --fd-paper:#FCFBF7; --fd-white:#FFFFFF;

  /* roles (paper ground) */
  --ink:var(--fd-blue-700);
  --muted:rgba(24,36,138,.72);
  --line:rgba(34,51,180,.20);
  --line-ledger:rgba(34,51,180,.10);
  --rule:var(--fd-blue-500);
  --bg:var(--fd-paper);
  --card:var(--fd-white);
  --brand:var(--fd-blue-500);
  --brand-ink:var(--fd-blue-700);
  --good:var(--fd-blue-700);
  --good-bg:var(--fd-blue-100);

  /* fonts */
  --fd-display:'Archivo','Arial Narrow',system-ui,sans-serif;
  --fd-body:'Schibsted Grotesk',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --fd-mono:'DM Mono','SFMono-Regular',Consolas,Menlo,monospace;

  --radius:0;
  --radius-pill:999px;
  --shadow:none;
  --rule-w:2px;
  --wrap:960px;
  --ease:cubic-bezier(.2,.7,.35,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--fd-paper);color:var(--ink);
  font-family:var(--fd-body);font-size:16px;line-height:1.6;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:var(--fd-blue-500);text-underline-offset:2px;text-decoration-thickness:1px}
a:hover{color:var(--fd-blue-900)}
img{max-width:100%}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px}

/* ---- Type ---- */
h1,h2,h3,h4{font-family:var(--fd-display);font-weight:700;color:var(--ink);letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(2.3rem,6vw,3.4rem);line-height:1.05;letter-spacing:-.03em}
h2{font-size:1.85rem;line-height:1.16}
h3{font-size:1.18rem;line-height:1.3}
p{margin:0 0 1rem;max-width:68ch}
.lede{color:var(--muted);font-size:1.08rem}
.sub{color:var(--muted);font-size:1.15rem;max-width:60ch;margin:0 0 1.6rem}
strong{font-weight:600}
em{font-style:italic}

/* mono label / eyebrow */
.eyebrow,.crumbs,.byline,.code-label{
  font-family:var(--fd-mono);font-weight:500;font-size:.66rem;
  text-transform:uppercase;letter-spacing:.16em;color:var(--fd-blue-500);
}
.crumbs,.byline{color:var(--muted)}
.crumbs a,.byline a{color:var(--fd-blue-500);text-decoration:none}
.eyebrow{margin-bottom:.9rem}

/* yellow highlighter behind key words — use <mark> or .mark */
mark,.mark{
  background:linear-gradient(transparent 8%,var(--fd-yellow-200) 8%,var(--fd-yellow-200) 88%,transparent 88%);
  color:inherit;padding:0 .06em;
}

/* ---- Header band (full-bleed ultramarine) ---- */
header.site{background:var(--fd-blue-500);color:#fff;border-bottom:var(--rule-w) solid var(--fd-blue-900);padding:16px 0}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}

/* FD tile logo */
.logo{display:inline-flex;align-items:center;gap:11px;font-family:var(--fd-display);font-weight:800;font-size:1.2rem;letter-spacing:-.035em;color:#fff !important;text-decoration:none}
.logo span{display:none}
.logo::before{
  content:"FD";display:inline-grid;place-items:center;width:32px;height:32px;
  background:var(--fd-white);color:var(--fd-blue-500);
  font-family:var(--fd-display);font-weight:800;font-size:.82rem;letter-spacing:.02em;
}

.mainnav{display:flex;flex-wrap:wrap;align-items:center;gap:22px}
.mainnav a{font-family:var(--fd-mono);font-weight:500;font-size:.68rem;text-transform:uppercase;letter-spacing:.16em;color:rgba(255,255,255,.82);text-decoration:none;margin:0}
.mainnav a:hover{color:#fff}

/* ---- Bands: every section is separated by a 2px ultramarine rule ---- */
section{padding:52px 0;border-top:var(--rule-w) solid var(--rule)}
.hero{padding:64px 0 44px;border-top:0}
section:first-of-type{border-top:0}

/* ---- Code card (the money element) ---- */
.code-card{
  background:var(--fd-white);border:var(--rule-w) solid var(--fd-blue-500);
  border-radius:0;box-shadow:none;padding:34px 28px;margin:6px 0 18px;text-align:center;
}
.verified{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--fd-mono);
  font-size:.66rem;font-weight:500;text-transform:uppercase;letter-spacing:.14em;
  color:var(--fd-blue-700);background:var(--fd-blue-100);
  border-radius:var(--radius-pill);padding:6px 14px;margin-bottom:16px;
}
.dot{width:7px;height:7px;border-radius:50%;background:var(--fd-blue-500);display:inline-block}
.code-label{margin-bottom:6px}
/* inline code chip (in prose) */
.code{
  display:inline-block;font-family:var(--fd-body);
  font-size:1.02rem;font-weight:700;letter-spacing:.1em;line-height:1.2;
  background:var(--fd-blue-500);color:#fff;border:none;border-radius:0;
  padding:3px 11px;vertical-align:baseline;
}
/* big hero code block (inside the code card only) */
.code-card .code{
  font-size:2.3rem;letter-spacing:.12em;padding:12px 26px;margin:8px 0;
}
.code-note{color:var(--muted);font-size:.95rem;margin:8px 0 20px}

/* ---- Buttons: pills, ultramarine fill ---- */
.btn{
  display:inline-block;background:var(--fd-blue-500);color:#fff !important;text-decoration:none;
  font-family:var(--fd-display);font-weight:700;font-size:.92rem;letter-spacing:.01em;
  padding:14px 28px;border:2px solid var(--fd-blue-500);border-radius:var(--radius-pill);
  box-shadow:none;cursor:pointer;transition:background .15s var(--ease),transform .06s var(--ease);
}
.btn:hover{background:var(--fd-blue-700);border-color:var(--fd-blue-700);transform:translateY(-1px)}
.btn.secondary{background:var(--fd-white);color:var(--fd-blue-700) !important;border:2px solid var(--fd-blue-500)}
.btn.secondary:hover{background:var(--fd-blue-100)}
.btn.secondary.copied{background:var(--fd-blue-700) !important;color:#fff !important;border-color:var(--fd-blue-700) !important}
.btn-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;align-items:center}
.cta{margin:8px 0 4px;line-height:1.9}
.cta .btn{margin-top:16px}
.code{vertical-align:middle}

/* ---- Steps (numbered) ---- */
ol.steps{counter-reset:s;list-style:none;padding:0;margin:0}
ol.steps li{position:relative;padding:14px 0 14px 52px;border-bottom:1px solid var(--line-ledger)}
ol.steps li:last-child{border-bottom:0}
ol.steps li::before{
  counter-increment:s;content:counter(s);position:absolute;left:0;top:12px;
  width:34px;height:34px;border-radius:0;background:var(--fd-blue-500);color:#fff;
  font-family:var(--fd-display);font-weight:800;display:grid;place-items:center;font-size:.95rem;
}
code.inline,.code-inline{background:var(--fd-white);border:1.5px solid var(--fd-blue-500);border-radius:var(--radius-pill);padding:2px 12px;font-family:var(--fd-mono);font-weight:500;letter-spacing:.06em;color:var(--fd-blue-700)}

/* ---- Grids / tiles / cards ---- */
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:0}
.grid2>*{border:1px solid var(--line);margin:-0.5px}
.tile{background:var(--fd-white);border:var(--rule-w) solid var(--line);border-radius:0;padding:22px;box-shadow:none}
.tile h3{margin-top:0}
.price{font-family:var(--fd-body);font-size:2.1rem;font-weight:700;color:var(--ink);letter-spacing:-.01em}
.price small{font-family:var(--fd-body);font-size:.85rem;font-weight:500;color:var(--muted);letter-spacing:0}

/* review page pro/con + verdict + stars */
.col{border:var(--rule-w) solid var(--line);padding:20px}
.col.pro{border-color:var(--fd-blue-500)}
.col.con{border-color:var(--line)}
.stars{font-family:var(--fd-display);color:var(--fd-yellow-500);letter-spacing:.05em}
.verdict{background:var(--fd-blue-100);border:var(--rule-w) solid var(--fd-blue-500);border-radius:0;padding:22px;box-shadow:none}
.pick{background:var(--fd-yellow-200);border:none;border-radius:0;padding:2px 8px;color:var(--fd-blue-700);font-weight:600}

/* ---- Videos ---- */
.videos{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.vid{display:block;text-decoration:none;color:inherit;border:var(--rule-w) solid var(--line);border-radius:0;overflow:hidden;background:var(--fd-white);transition:border-color .15s var(--ease)}
.vid:hover{border-color:var(--fd-blue-500)}
.vid img{width:100%;display:block;aspect-ratio:16/9;object-fit:cover;background:var(--fd-blue-100)}
.vid .cap{padding:13px 15px;font-weight:600;font-size:.95rem;color:var(--ink)}
.vid.span2{grid-column:1 / -1}
.videobox{border:var(--rule-w) solid var(--line);border-radius:0}

/* ---- Details / FAQ ---- */
details{border:var(--rule-w) solid var(--line);border-radius:0;background:var(--fd-white);margin:0 0 -2px;padding:2px 20px}
details summary{cursor:pointer;font-family:var(--fd-display);font-weight:700;padding:16px 0;list-style:none;color:var(--ink)}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"+";float:right;color:var(--fd-blue-500);font-weight:800;font-family:var(--fd-display)}
details[open] summary::after{content:"–"}
details .body{padding:0 0 16px;color:var(--muted)}

/* ---- Tables (comparison) ---- */
.tablewrap{overflow-x:auto;border:var(--rule-w) solid var(--fd-blue-500);border-radius:0}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);border-right:1px solid var(--line-ledger)}
th{background:var(--fd-blue-100);font-family:var(--fd-mono);font-weight:500;text-transform:uppercase;letter-spacing:.08em;font-size:.66rem;color:var(--fd-blue-700)}
tr:last-child td{border-bottom:0}

/* ---- Disclosure ---- */
.disclose,.disclose-box{background:var(--fd-white);border:1px solid var(--line);border-left:6px solid var(--fd-yellow-500);border-radius:0;padding:16px 18px;font-size:.92rem;color:var(--muted)}

/* related links */
.related{display:grid;grid-template-columns:1fr 1fr;gap:0}
.related>*{border:1px solid var(--line);margin:-0.5px;padding:20px;text-decoration:none;color:inherit;background:var(--fd-white)}
.related a:hover,.tile:hover{border-color:var(--fd-blue-500)}

/* socials (about page) */
.socials,.social{display:flex;flex-wrap:wrap;gap:12px}
.social a,.socials a{font-family:var(--fd-mono);font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;text-decoration:none;color:var(--fd-blue-700);border:2px solid var(--fd-blue-500);border-radius:var(--radius-pill);padding:8px 16px}
.social a:hover,.socials a:hover{background:var(--fd-blue-500);color:#fff}
.rule{height:var(--rule-w);background:var(--fd-blue-500);border:0;margin:22px 0}

/* ---- Footer: deep inverted band ---- */
footer{background:var(--fd-blue-900);color:rgba(255,255,255,.82);border-top:var(--rule-w) solid var(--fd-blue-500);padding:44px 0 64px;font-size:.9rem}
footer a{color:#fff}
footer strong{color:#fff}

@media(max-width:640px){
  h1{font-size:2rem}
  .grid2,.videos,.related{grid-template-columns:1fr}
  .code{font-size:1.7rem}
  .wrap{padding:0 20px}
  .mainnav{gap:14px}
  section{padding:38px 0}
}