/* Shared chrome: page frame, nav, footer, home cards, archive list, error page.
   Colours come from tokens.css only. */

*{box-sizing:border-box}
html,body{margin:0}
body{
  background:var(--page);color:var(--ink);font-family:var(--ui);
  padding-bottom:60px;
  /* two soft blooms of the base colour, so the ground has some weather in it
     rather than being one flat fill behind everything */
  background-image:
    radial-gradient(760px 420px at 12% -8%,var(--glow-soft),transparent 70%),
    radial-gradient(620px 380px at 92% 4%,var(--glow-soft),transparent 72%);
  background-attachment:fixed;
}
a{color:var(--accent-ink)}

.wrap{max-width:880px;margin:0 auto;padding:0 20px}

/* ---------------- nav ---------------- */
.nav{
  max-width:880px;margin:0 auto;padding:20px 20px 0;
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;
}
/* the brand is set as a tile: dark chip, light letters, the same object the
   board is made of. It is the cheapest way to say what the site is. */
.nav-brand{
  font-family:var(--display);font-weight:800;font-size:17px;letter-spacing:-.01em;
  color:var(--page);text-decoration:none;background:var(--ink);
  padding:8px 14px;border-radius:var(--radius-card);
  box-shadow:0 0 10px 0 var(--glow-line);
  transition:transform .16s var(--spring),box-shadow .16s var(--spring);
}
.nav-brand:hover{
  transform:translateY(-1px);
  box-shadow:0 0 16px 2px var(--glow-line),0 10px 22px -10px var(--glow-soft);
}
.nav-links{margin-left:auto;display:flex;gap:8px}
.nav-links a{
  font-size:13px;font-weight:700;letter-spacing:.01em;color:var(--slate);text-decoration:none;
  padding:8px 15px;border-radius:var(--radius-pill);border:2px solid transparent;
  transition:color .15s,border-color .15s,background .15s;
}
.nav-links a:hover{color:var(--ink);border-color:var(--rule-firm);background:var(--card)}
.nav-links a.is-current{color:var(--accent-ink);border-color:var(--accent-deep);background:var(--accent-soft)}

/* ---------------- footer ---------------- */
.footer{
  max-width:880px;margin:52px auto 0;padding:22px 20px;border-top:2px solid var(--rule);
}
.footer p{margin:0;font-size:13px;line-height:1.7;color:var(--dim);text-align:center}

/* ---------------- home ---------------- */
.hero{padding:48px 0 8px;text-align:center}
.hero h1{
  font-family:var(--display);font-weight:800;font-size:clamp(38px,7.5vw,60px);
  letter-spacing:-.035em;line-height:1.02;margin:0;
}
/* the emphasis takes today's accent, the same colour the cards below it are
   bordered in, so the headline and the puzzle read as one thing */
.hero h1 em{font-style:normal;color:var(--accent-ink)}

.cards{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:22px;margin:44px 0 0;
}
/* the accent is the card's border, not a shadow behind it. A hard offset shadow
   in a hue the card itself is not reads as a misregistered second copy rather
   than as a shadow, and hovering it made that worse: the card slid up-left while
   the shadow grew, so what moved was a coloured band and not the card. As a
   border the accent is part of the object, and a hover has one thing to do —
   lift it and bloom the glow with it. */
.card{
  display:block;text-decoration:none;color:inherit;
  background:var(--card);border:2.5px solid var(--accent-deep);border-radius:var(--radius-card);
  padding:26px;
  transition:transform .18s var(--spring),box-shadow .18s var(--spring),border-color .18s;
}
/* the halo is blurred, never a hard ring: a 0-blur spread draws a crisp second
   outline outside the border and reads as two borders, not as light */
.card:hover{
  transform:translateY(-3px);border-color:var(--accent);
  box-shadow:0 0 18px 1px var(--accent-glow),0 16px 34px -14px var(--accent-glow);
}
.card .eyebrow{
  font-size:11px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-ink);
}
.card h2{font-family:var(--display);font-weight:800;font-size:29px;margin:10px 0 0;letter-spacing:-.025em}
.card p{margin:12px 0 0;font-size:15px;line-height:1.6;color:var(--slate)}
.card .cta{
  display:inline-block;margin-top:18px;font-size:13px;font-weight:800;
  letter-spacing:.01em;color:var(--accent-ink);
}
.card.is-empty{
  border-style:dashed;border-color:var(--rule-firm);background:transparent;box-shadow:none;
}
.card.is-empty:hover{transform:none;box-shadow:none;border-color:var(--rule-firm)}

/* ---------------- archive ---------------- */
.page-head{padding:40px 0 6px}
.page-head h1{
  font-family:var(--display);font-weight:800;font-size:clamp(32px,5.5vw,46px);
  letter-spacing:-.03em;margin:0;
}
.page-head p{margin:12px 0 0;font-size:16px;line-height:1.6;color:var(--slate);max-width:560px}

.archive{list-style:none;margin:28px 0 0;padding:0;display:grid;gap:10px}
.archive li{margin:0}
/* each row carries its own puzzle's accent on its left edge, so the list reads
   as the run of colours the puzzles actually are */
.archive a{
  display:flex;align-items:center;gap:16px;text-decoration:none;color:inherit;
  background:var(--card);border:2px solid var(--rule-firm);
  border-left:7px solid var(--accent);border-radius:var(--radius-card);
  padding:15px 18px;transition:transform .18s var(--spring),border-color .18s;
}
.archive a:hover{transform:translateX(4px);border-color:var(--ink);border-left-color:var(--accent)}
.archive .no{
  font-family:var(--serif);font-weight:900;font-size:26px;
  font-variation-settings:"SOFT" 70,"WONK" 1;
  min-width:52px;color:var(--accent-ink);font-variant-numeric:tabular-nums;
}
.archive .about{min-width:0}
/* both are spans, so they need making block-level to stack — margin-top on an
   inline box does nothing, and the date and its figures ran together on one line */
.archive .when{display:block;font-size:15px;font-weight:700}
.archive .figures{display:block;font-size:13px;color:var(--dim);margin-top:3px}
.archive .badge{
  margin-left:auto;flex:none;font-size:11px;font-weight:800;letter-spacing:.08em;
  text-transform:uppercase;padding:6px 12px;border-radius:var(--radius-pill);
  border:2px solid var(--rule-firm);color:var(--dim);white-space:nowrap;
}
.archive .badge.is-solved{color:var(--accent-ink);border-color:var(--accent-deep);background:var(--accent-soft)}
.archive .badge.is-progress{color:var(--slate);border-color:var(--slate)}
.archive .badge.is-gaveup{color:var(--dim)}
/* Badges are written by /js/archive.js from localStorage; without JS the rows
   are complete, just unbadged. */
.archive .badge:empty{display:none}
.archive .today{
  display:inline-block;margin-left:8px;
  font-size:10px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;
  color:var(--on-accent);background:var(--glow);padding:3px 8px;border-radius:var(--radius-pill);
}

/* ---------------- error ---------------- */
.error-box{padding:64px 0 20px;text-align:center}
.error-box h1{font-family:var(--display);font-weight:800;font-size:40px;letter-spacing:-.03em;margin:0}
.error-box p{margin:14px auto 0;max-width:460px;font-size:16px;line-height:1.7;color:var(--slate)}
.error-box .actions{margin-top:26px;display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.error-box .actions a{
  text-decoration:none;font-size:13px;font-weight:800;letter-spacing:.02em;
  padding:12px 22px;border-radius:var(--radius-pill);border:2.5px solid var(--ink);
  background:var(--ink);color:var(--page);transition:transform .15s var(--spring);
}
.error-box .actions a:hover{transform:translateY(-2px)}
.error-box .actions a.ghost{background:transparent;color:var(--ink)}

/* ---------------- quality floor ---------------- */
@media (max-width:680px){
  .nav{padding-top:16px}
  .hero{padding-top:34px}
  .card{padding:22px}
  .archive a{gap:12px;padding:13px 14px}
  .archive .no{font-size:22px;min-width:40px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
:focus-visible{outline:3px solid var(--accent-ink);outline-offset:2px}