/* learnthings.online — designed as a printed continuing-education course bulletin.
   Numbered listings with hairline rules instead of cards; a masthead strip; condensed caps for catalog meta;
   one dominant ink (deep green) on cool off-white; one accent (oxblood) used like a stamp. Newsreader + Archivo Narrow, self-hosted. */
:root{
  --paper:#f4f5f2; --paper-2:#eceee9; --ink:#15201b; --ink-2:#36443d; --ink-3:#5d6a63;
  --green:#1f3d33; --green-2:#2b5547; --stamp:#7a1f2b; --rule:#c9cfc8; --rule-2:#15201b;
  --font-serif:"Newsreader",Georgia,"Times New Roman",serif;
  --font-cond:"Archivo Narrow","Arial Narrow","Helvetica Neue",Arial,sans-serif;
  --col:1120px;
}
@media (prefers-color-scheme: dark){ :root{
  --paper:#101614; --paper-2:#171f1c; --ink:#e8ebe6; --ink-2:#c2c9c3; --ink-3:#8f9a92;
  --green:#0b1512; --green-2:#8fbfae; --stamp:#d6707c; --rule:#2c3833; --rule-2:#e8ebe6;
}}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-serif);font-size:19px;line-height:1.5;font-weight:400;font-optical-sizing:auto}
a{color:inherit;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--green-2)}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:var(--paper);padding:.6rem 1rem;z-index:100;text-decoration:none;font-family:var(--font-cond)}
.skip:focus{left:8px}
a:focus-visible,button:focus-visible{outline:3px solid var(--stamp);outline-offset:3px}
.wrap{max-width:var(--col);margin:0 auto;padding:0 24px}
.cond{font-family:var(--font-cond);font-weight:600;font-size:.82rem;letter-spacing:.14em;text-transform:uppercase}

/* Masthead strip */
.mast{background:var(--green);color:#e9efe9;border-bottom:3px solid var(--ink)}
@media (prefers-color-scheme: dark){.mast{border-bottom-color:var(--green-2)}}
.mast .wrap{display:grid;grid-template-columns:1fr auto;gap:1rem;align-items:baseline;padding:.9rem 24px}
.mast .name{font-family:var(--font-serif);font-weight:500;font-size:1.55rem;letter-spacing:.005em;text-decoration:none;color:inherit;line-height:1}
.mast .name:hover{color:#fff}
.mast .issue{font-family:var(--font-cond);font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:#b9cdbf;display:flex;gap:1.4rem;flex-wrap:wrap}
.mast .issue a{text-decoration:none;color:inherit}
.mast .issue a:hover{color:#fff;text-decoration:underline}

/* Opening statement: off-center, 7 of 12 columns, hard rule below */
.open{padding:4rem 0 3rem;border-bottom:1px solid var(--rule-2)}
.open .wrap{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:3rem}
.open h1{font-family:var(--font-serif);font-weight:300;font-size:clamp(2.6rem,6.2vw,4.9rem);line-height:.98;letter-spacing:-.02em;margin:0 0 1.6rem;text-wrap:balance}
.open .sub{font-size:1.45rem;line-height:1.35;font-weight:500;margin:0 0 1.2rem;color:var(--ink)}
.open p{margin:0 0 1rem;color:var(--ink-2);max-width:56ch}
.open aside{border-left:1px solid var(--rule-2);padding-left:1.6rem;align-self:end}
.open aside .cond{color:var(--ink-3);display:block;margin-bottom:.8rem}
.open aside ul{list-style:none;margin:0;padding:0;font-size:1.1rem}
.open aside li{padding:.55rem 0;border-top:1px solid var(--rule)}
.open aside li:first-child{border-top:0}

/* Catalog listings */
.catalog{padding:2.4rem 0 1rem}
.catalog h2{font-family:var(--font-serif);font-weight:400;font-size:2.2rem;letter-spacing:-.01em;margin:0 0 .4rem;display:flex;align-items:baseline;gap:1.2rem;flex-wrap:wrap}
.catalog h2 .cond{color:var(--ink-3);font-weight:500}
.listing{display:grid;grid-template-columns:7rem minmax(0,1fr) 16.5rem;gap:0 2.2rem;padding:2.2rem 0;border-top:1px solid var(--rule-2);text-decoration:none;color:inherit}
.listing:first-of-type{border-top:2px solid var(--rule-2);margin-top:1rem}
.listing:last-of-type{border-bottom:2px solid var(--rule-2)}
.listing .no{font-family:var(--font-serif);font-weight:200;font-size:5.6rem;line-height:.8;letter-spacing:-.04em;color:var(--green-2);transition:color .2s}
.listing:hover .no{color:var(--stamp)}
.listing .voice{font-family:var(--font-serif);font-style:italic;font-size:1.25rem;color:var(--ink-3);margin:0 0 .25rem}
.listing h3{font-family:var(--font-serif);font-weight:500;font-size:2.1rem;line-height:1.05;letter-spacing:-.015em;margin:0 0 .8rem;color:var(--ink)}
.listing:hover h3{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:5px;text-decoration-color:var(--stamp)}
.listing p{margin:0;color:var(--ink-2);max-width:62ch}
.listing .side{border-left:1px solid var(--rule);padding-left:1.4rem;display:flex;flex-direction:column;gap:.9rem;justify-content:space-between}
.listing .meta{font-family:var(--font-cond);font-size:.84rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-2);line-height:1.7;margin:0;padding:0;list-style:none}
.listing .meta li+li{border-top:1px solid var(--rule)}
.listing .go{font-family:var(--font-cond);font-weight:700;font-size:.9rem;letter-spacing:.08em;text-transform:uppercase;color:var(--stamp)}

/* Method: three numbered notes with rules, no boxes */
.method{padding:3rem 0 2rem}
.method h2{font-family:var(--font-serif);font-weight:400;font-size:2.2rem;letter-spacing:-.01em;margin:0 0 1.4rem}
.method ol{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 2.4rem;border-top:1px solid var(--rule-2)}
.method li{padding:1.3rem 0 1.6rem}
.method li+li{border-left:1px solid var(--rule);padding-left:2.4rem;margin-left:-2.4rem}
.method .cond{color:var(--stamp);display:block;margin-bottom:.5rem}
.method h3{font-family:var(--font-serif);font-weight:500;font-size:1.45rem;margin:0 0 .5rem;line-height:1.15}
.method p{margin:0;color:var(--ink-2);font-size:1.02rem}

/* Statement: two columns, headline on the left */
.statement{padding:2.4rem 0 3.4rem;border-top:1px solid var(--rule-2)}
.statement .wrap{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:3rem}
.statement h2{font-family:var(--font-serif);font-weight:300;font-size:clamp(2rem,4vw,3.1rem);line-height:1.02;letter-spacing:-.02em;margin:0}
.statement p{margin:0 0 1rem;color:var(--ink-2)}
.statement p.last{color:var(--ink);font-weight:500;font-size:1.2rem}
.statement .note{margin-top:1.6rem;padding-top:1rem;border-top:1px solid var(--rule);font-family:var(--font-cond);font-size:.92rem;letter-spacing:.03em;color:var(--ink-3)}

/* Colophon */
footer{background:var(--paper-2);border-top:3px solid var(--ink);padding:1.4rem 0 2.6rem;font-family:var(--font-cond);font-size:.86rem;letter-spacing:.04em;color:var(--ink-3)}
@media (prefers-color-scheme: dark){footer{border-top-color:var(--green-2)}}
footer .wrap{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem 2rem}
footer a{color:var(--ink-2);text-decoration:none}
footer a:hover{text-decoration:underline}
footer .k{display:block;text-transform:uppercase;letter-spacing:.14em;font-weight:600;color:var(--ink-3);margin-bottom:.3rem;font-size:.74rem}

/* Reveal on load: one orchestrated moment */
@media (prefers-reduced-motion: no-preference){
  .open .wrap>*, .listing, .method li{opacity:0;transform:translateY(10px);animation:rise .6s cubic-bezier(.2,.7,.2,1) forwards}
  .open .wrap>:nth-child(2){animation-delay:.12s}
  .listing:nth-of-type(1){animation-delay:.2s}.listing:nth-of-type(2){animation-delay:.3s}.listing:nth-of-type(3){animation-delay:.4s}
  .method li:nth-child(1){animation-delay:.3s}.method li:nth-child(2){animation-delay:.4s}.method li:nth-child(3){animation-delay:.5s}
  @keyframes rise{to{opacity:1;transform:none}}
}

@media (max-width:900px){
  body{font-size:18px}
  .open{padding:2.6rem 0 2rem}
  .open .wrap,.statement .wrap{grid-template-columns:1fr;gap:1.6rem}
  .open aside{border-left:0;border-top:1px solid var(--rule-2);padding:1rem 0 0}
  .listing{grid-template-columns:4.2rem minmax(0,1fr);gap:0 1.2rem;padding:1.6rem 0}
  .listing .no{font-size:3.4rem}
  .listing .side{grid-column:2;border-left:0;padding:1rem 0 0;margin-top:.4rem;border-top:1px solid var(--rule)}
  .method ol{grid-template-columns:1fr}
  .method li+li{border-left:0;padding-left:0;margin-left:0;border-top:1px solid var(--rule)}
  footer .wrap{grid-template-columns:1fr}
  .mast .wrap{grid-template-columns:1fr;gap:.4rem}
}
@media print{.mast .issue,footer{display:none}.listing{break-inside:avoid}body{background:#fff;color:#000}}