/* ============================================================
   clave.css — shared design foundation for clave.press
   Aesthetic: editorial intelligence dossier (refined-institutional).
   One stylesheet for every page; kills per-page inline duplication.
   Self-origin only — CSP-safe (style-src 'self'; font-src 'self').
   Established 2026-05-29 (frontend-design pilot → rollout).
   ============================================================ */

/* ---------- self-hosted fonts (OFL, see fonts/LICENSES.txt) ---------- */
@font-face{font-family:'Newsreader';font-style:normal;font-weight:400;font-display:swap;src:url('/assets/fonts/newsreader-400.woff2') format('woff2')}
@font-face{font-family:'Newsreader';font-style:normal;font-weight:600;font-display:swap;src:url('/assets/fonts/newsreader-600.woff2') format('woff2')}
@font-face{font-family:'Newsreader';font-style:italic;font-weight:400;font-display:swap;src:url('/assets/fonts/newsreader-400i.woff2') format('woff2')}
@font-face{font-family:'Newsreader';font-style:italic;font-weight:600;font-display:swap;src:url('/assets/fonts/newsreader-600i.woff2') format('woff2')}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:400;font-display:swap;src:url('/assets/fonts/plexsans-400.woff2') format('woff2')}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:500;font-display:swap;src:url('/assets/fonts/plexsans-500.woff2') format('woff2')}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:600;font-display:swap;src:url('/assets/fonts/plexsans-600.woff2') format('woff2')}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:500;font-display:swap;src:url('/assets/fonts/plexmono-500.woff2') format('woff2')}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:600;font-display:swap;src:url('/assets/fonts/plexmono-600.woff2') format('woff2')}

:root{
  /* type families */
  --serif:'Newsreader','Iowan Old Style','Palatino Linotype',Palatino,Georgia,'Times New Roman',serif;
  --sans:'IBM Plex Sans',ui-sans-serif,system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,'SF Mono',Menlo,Consolas,monospace;

  /* color — honest semantic names */
  --paper:#FAF8F3; --paper-2:#F2EDE1;
  --ink:#16140F; --ink-soft:#3A372E; --muted:#736E61;
  --line:#E4DECF;
  --slate:#191E2C; --slate-2:#222A3D;
  --on-slate:#E8E4DB; --on-slate-dim:#9AA0AE;
  --accent:#C9952A; --accent-deep:#846410; --accent-soft:rgba(201,149,42,.30);

  /* spacing scale (8px base) */
  --sp-1:.5rem; --sp-2:1rem; --sp-3:1.5rem; --sp-4:2.5rem; --sp-5:4rem; --sp-6:6rem;

  /* type scale */
  --fs-eyebrow:.6875rem; --fs-small:.84375rem; --fs-body:1.0625rem;
  --fs-lead:clamp(1.0625rem,.9rem + .5vw,1.1875rem);
  --fs-h3:1.25rem;
  --fs-display:clamp(1.8rem,1rem + 2.8vw,2.7rem);

  --measure:34rem; --shell:52rem;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--serif);background:var(--paper);color:var(--ink);
  font-size:var(--fs-body);line-height:1.7;
  font-feature-settings:"kern" 1,"liga" 1;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;
}
.eyebrow{font-family:var(--mono);font-size:var(--fs-eyebrow);font-weight:600;letter-spacing:.22em;text-transform:uppercase}
a{color:inherit}
::selection{background:var(--accent-soft);color:var(--ink)}

/* ---------- header ---------- */
.site-header{background:var(--slate);border-bottom:1px solid rgba(255,255,255,.06);position:sticky;top:0;z-index:20}
.site-header::after{content:"";display:block;height:2px;background:linear-gradient(90deg,var(--accent),transparent 62%)}
.hdr-in{max-width:var(--shell);margin:0 auto;padding:.95rem clamp(1rem,4vw,2rem);display:flex;align-items:center;justify-content:space-between;gap:1rem}
.logo{font-family:var(--mono);font-weight:700;font-size:.875rem;letter-spacing:.34em;color:var(--accent);text-decoration:none;white-space:nowrap}
.nav{display:flex;gap:clamp(.75rem,2.4vw,1.5rem);align-items:center;flex-wrap:wrap;justify-content:flex-end}
.nav a{font-family:var(--sans);font-size:.78125rem;font-weight:500;letter-spacing:.02em;color:var(--on-slate-dim);text-decoration:none;padding-bottom:2px;border-bottom:1px solid transparent;transition:color .18s,border-color .18s}
.nav a:hover,.nav a:focus-visible{color:#fff;border-bottom-color:var(--accent)}
.nav a.sub{color:var(--on-slate)}
.nav a.active{color:#fff;border-bottom-color:var(--accent)}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;color:var(--on-slate);
  background:
    radial-gradient(120% 140% at 15% -10%,rgba(201,149,42,.10),transparent 46%),
    radial-gradient(90% 120% at 100% 120%,rgba(34,42,61,.9),transparent 55%),
    linear-gradient(180deg,var(--slate-2),var(--slate));
  /* vertical room scales with each reader's viewport height (vh), clamped both ends */
  padding:clamp(1.25rem,3.5vh,2.5rem) clamp(1rem,4vw,2rem) clamp(1.1rem,3vh,2rem);
}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(180deg,rgba(255,255,255,.022) 0 1px,transparent 1px 34px);
  mask-image:linear-gradient(180deg,transparent,#000 30%,#000 70%,transparent)}
.hero-in{position:relative;max-width:var(--shell);margin:0 auto}       /* homepage: left rail aligns with main */
.hero-inner{position:relative;max-width:46rem;margin:0 auto;text-align:center} /* content pages: centered */
.hero .eyebrow,.hero .badge{color:var(--accent);display:inline-block;margin-bottom:.8rem;font-family:var(--mono);font-size:var(--fs-eyebrow);font-weight:600;letter-spacing:.22em;text-transform:uppercase}
.hero .badge{border:1px solid var(--accent-soft);padding:4px 11px;border-radius:2px;margin-bottom:1.1rem}
.hero h1{font-family:var(--serif);font-weight:600;font-size:var(--fs-display);line-height:1.1;letter-spacing:-.015em;color:#fff;margin-bottom:1rem;text-wrap:balance}
.hero h1 .gap{display:block;color:var(--accent);font-style:italic;font-weight:600;position:relative;padding-top:.5rem;margin-top:.4rem}
.hero h1 .gap::before{content:"";position:absolute;top:0;left:0;width:3.25rem;height:1px;background:linear-gradient(90deg,var(--accent),transparent)}
.hero-inner h1 .gap::before{left:50%;transform:translateX(-50%);background:linear-gradient(90deg,transparent,var(--accent),transparent)}
.hero p{font-family:var(--sans);font-size:var(--fs-lead);font-weight:400;line-height:1.55;color:var(--on-slate-dim);max-width:38rem;margin-bottom:1.3rem}
.hero-inner p{margin-left:auto;margin-right:auto;margin-bottom:0}

/* buttons */
.btn-row{display:flex;gap:.75rem;flex-wrap:wrap}
.hero-inner .btn-row{justify-content:center}
.btn{font-family:var(--sans);font-size:.84375rem;font-weight:600;letter-spacing:.01em;padding:.72rem 1.4rem;border-radius:3px;text-decoration:none;display:inline-flex;align-items:center;gap:.4rem;transition:transform .16s,background .18s,border-color .18s,color .18s}
.btn.primary{background:var(--accent);color:#1c1606}
.btn.primary:hover{background:#dca838;transform:translateY(-1px)}
.btn.ghost{border:1px solid rgba(255,255,255,.22);color:var(--on-slate)}
.btn.ghost:hover{border-color:var(--accent);color:#fff}

/* ---------- main / content shells ---------- */
.main{max-width:var(--shell);margin:0 auto;padding:clamp(1.4rem,2.5vh,2rem) clamp(1rem,4vw,2rem) var(--sp-6)}
.content{max-width:46rem;margin:0 auto;padding:clamp(2.25rem,5vh,3.5rem) clamp(1rem,4vw,2rem) var(--sp-6)}
.section + .section{margin-top:3.25rem}

/* section eyebrow header (homepage .sh + content h2 share one look) */
.sh,.content h2{font-family:var(--mono);font-size:var(--fs-eyebrow);font-weight:600;letter-spacing:.22em;text-transform:uppercase;color:var(--accent-deep);display:flex;align-items:center;gap:.85rem;margin:var(--sp-5) 0 var(--sp-3)}
.sh::after,.content h2::after{content:"";flex:1;height:1px;background:var(--line)}
.sh{margin-top:0}
.content h2:first-of-type{margin-top:0}

/* content prose */
.content h3{font-family:var(--serif);font-weight:600;font-size:var(--fs-h3);color:var(--ink);margin:var(--sp-4) 0 .5rem;line-height:1.3}
.content p{font-family:var(--sans);font-size:var(--fs-small);font-weight:400;color:var(--ink-soft);line-height:1.78;margin:1rem 0;max-width:var(--measure)}
.content ul{font-family:var(--sans);font-size:var(--fs-small);color:var(--ink-soft);line-height:1.7;padding-left:1.2rem;margin:1rem 0;max-width:var(--measure)}
.content li{margin:.55rem 0}
.content strong{color:var(--ink);font-weight:600}
.content a{color:var(--accent-deep);text-decoration:none;border-bottom:1px solid var(--accent-soft);padding-bottom:1px;transition:border-color .18s}
.content a:hover{border-bottom-color:var(--accent-deep)}
.content code{font-family:var(--mono);font-size:.82em;background:var(--paper-2);padding:.1em .35em;border-radius:3px;color:var(--ink-soft)}

/* coming-up panel (homepage) */
.coming{background:var(--paper-2);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:0 4px 4px 0;padding:clamp(1.6rem,4vw,2.4rem)}
.coming .tag{font-family:var(--mono);font-size:var(--fs-eyebrow);font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--accent-deep);margin-bottom:.85rem}
.coming h2{font-family:var(--serif);font-weight:600;font-size:var(--fs-h3);line-height:1.35;color:var(--ink);margin-bottom:.6rem}
.coming p{font-family:var(--sans);font-size:var(--fs-small);font-weight:400;color:var(--ink-soft);line-height:1.7;max-width:var(--measure)}

/* method principles (homepage) */
.method-intro{font-family:var(--sans);font-size:var(--fs-small);color:var(--muted);margin-bottom:var(--sp-4);letter-spacing:.01em}
.principles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0}
.principle{padding:var(--sp-3) var(--sp-4) var(--sp-3) 0;border-top:1px solid var(--line);position:relative}
.principle:nth-child(even){padding-left:var(--sp-4);border-left:1px solid var(--line)}
@media(max-width:620px){.principles{grid-template-columns:1fr}.principle,.principle:nth-child(even){padding:var(--sp-3) 0;border-left:none}}
.principle .num{font-family:var(--mono);font-size:.8125rem;font-weight:600;color:var(--accent-deep);letter-spacing:.05em;display:block;margin-bottom:.7rem}
.principle h3{font-family:var(--serif);font-weight:600;font-size:1.0625rem;color:var(--ink);margin-bottom:.45rem;line-height:1.3}
.principle p{font-family:var(--sans);font-size:var(--fs-small);font-weight:400;color:var(--ink-soft);line-height:1.65}
.method-more{margin-top:var(--sp-3);text-align:right}
.tlink{font-family:var(--sans);font-size:var(--fs-small);font-weight:600;color:var(--accent-deep);text-decoration:none;border-bottom:1px solid var(--accent-soft);padding-bottom:1px;transition:border-color .18s}
.tlink:hover{border-bottom-color:var(--accent-deep)}

/* about (homepage) */
.about{font-family:var(--sans);font-size:var(--fs-body);font-weight:400;color:var(--ink-soft);line-height:1.8;max-width:var(--measure)}
.about a{color:var(--accent-deep);text-decoration:none;font-weight:600;border-bottom:1px solid var(--accent-soft)}
.about a:hover{border-bottom-color:var(--accent-deep)}

/* callouts / labels / panels (content pages) */
.callout{background:rgba(201,149,42,.06);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:0 4px 4px 0;padding:1rem 1.25rem;margin:1.5rem 0;max-width:var(--measure)}
.callout p{margin:0;font-family:var(--sans);font-size:var(--fs-small);color:var(--ink-soft);line-height:1.7}
.placeholder{background:var(--paper-2);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:0 4px 4px 0;padding:1.5rem;margin:1.5rem 0;max-width:var(--measure)}
.placeholder p{margin:.5rem 0;font-family:var(--sans);font-size:var(--fs-small);color:var(--ink-soft);line-height:1.7}
.placeholder strong{font-family:var(--sans);color:var(--ink)}
.license-label{font-family:var(--mono);font-size:var(--fs-eyebrow);font-weight:600;letter-spacing:.16em;color:var(--accent-deep);text-transform:uppercase;margin-bottom:6px}
.meta-line{font-family:var(--sans);font-size:var(--fs-small);color:var(--muted);margin-top:var(--sp-4)}
.cross-link{font-family:var(--sans);font-size:var(--fs-small);color:var(--muted);margin-top:var(--sp-4)}
.cross-link a{color:var(--accent-deep);text-decoration:none;border-bottom:1px solid var(--accent-soft);padding-bottom:1px}
.cross-link a:hover{border-bottom-color:var(--accent-deep)}

/* disclaimer (shared; works as class or trailing legal block) */
.disclaimer{font-family:var(--sans);font-size:.78125rem;color:var(--muted);font-style:italic;line-height:1.7;margin-top:var(--sp-4);padding:var(--sp-2) 0 0;border-top:1px solid var(--line);max-width:var(--shell)}
.disclaimer.boxed{font-style:normal;background:var(--paper-2);border:1px solid var(--line);border-radius:4px;padding:1.25rem;margin-top:var(--sp-4)}

/* ---------- footer ---------- */
.site-footer{background:var(--slate);color:var(--on-slate-dim);padding:var(--sp-5) clamp(1rem,4vw,2rem) var(--sp-4);margin-top:var(--sp-6)}
.foot-in{max-width:var(--shell);margin:0 auto;text-align:center}
.foot-logo{font-family:var(--mono);font-weight:700;font-size:.8125rem;letter-spacing:.26em;color:var(--accent);margin-bottom:.9rem}
.foot-links{font-family:var(--sans);font-size:.78125rem;line-height:2.1}
.foot-links a{color:var(--on-slate-dim);text-decoration:none;transition:color .16s}
.foot-links a:hover{color:var(--on-slate)}
.foot-links a.sub{color:var(--on-slate)}
.privacy{font-family:var(--sans);font-size:.6875rem;color:#6B7280;line-height:1.75;max-width:43rem;margin:var(--sp-3) auto 0;text-align:left;padding-top:var(--sp-2);border-top:1px solid rgba(255,255,255,.07)}
.privacy a{color:#8A8F9A}

/* ---------- entrance motion ---------- */
@media(prefers-reduced-motion:no-preference){
  .reveal{opacity:0;transform:translateY(14px);animation:rise .7s cubic-bezier(.2,.7,.3,1) forwards}
  .d1{animation-delay:.05s}.d2{animation-delay:.13s}.d3{animation-delay:.21s}.d4{animation-delay:.29s}
  @keyframes rise{to{opacity:1;transform:none}}
}