/* weathermaps.earth — shared theme. Same structural system as squall.cloud and
   weather.city (MUTCD signage + National Geographic editorial, Overpass
   typography), with the guide-sign green swapped for MUTCD Interstate blue.
   Light only, by policy — see the design system note in CLAUDE.md §7. */
:root{
  --paper:#e5e4e1; --card:#ffffff; --ink:#161616; --ink2:#464a52;
  /* interstate blue is the sign colour: masthead, rules, active controls */
  --sign:#003f87; --sign-dk:#00285c; --sign-tx:#ffffff; --sign-sub:#c3dcf7;
  /* links/buttons sit a step brighter so they read against the sign blue */
  --blue:#0a5ca8; --navy:#00285c;
  --red:#b0242e;
  --line:#c7c8cc; --line2:#e2e3e6; --mut:#7f838b;
  --radar:#0b0d10;                 /* neutral mat behind imagery */
  --maxw:1280px;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--paper)}
body{color:var(--ink);font-family:'Overpass',Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;line-height:1.5}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--sign)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 18px}

/* top utility strip (dark, blue underline) */
.util{background:var(--ink);color:#cbccd0;border-bottom:3px solid var(--sign);
  font-family:'Overpass Mono',ui-monospace,monospace;font-size:11.5px;font-weight:700;
  letter-spacing:.06em}
.util .wrap{display:flex;align-items:center;gap:16px;height:34px}
.util a{color:#cbccd0}.util a:hover{color:var(--sign-sub)}
.util .sp{flex:1}

/* masthead — the interstate shield sign */
.mast{background:var(--sign);border-radius:10px;color:#fff;padding:16px 20px;margin:16px 0;
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:space-between;
  box-shadow:inset 0 0 0 4px var(--sign),inset 0 0 0 6px rgba(255,255,255,.9),0 10px 26px rgba(0,0,0,.15)}
.mast .word{font-weight:900;font-size:26px;letter-spacing:.01em;color:#fff}
.mast .word .yl{color:var(--sign-sub)}
.mast .tag{font-family:'Overpass Mono',monospace;font-weight:700;font-size:12px;
  letter-spacing:.1em;color:var(--sign-sub);text-transform:uppercase}
.mast nav{display:flex;gap:6px;flex-wrap:wrap}
.mast nav a{font-family:'Overpass Mono',monospace;font-size:11.5px;font-weight:700;
  letter-spacing:.06em;text-transform:uppercase;color:#eaf3ff;background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.28);border-radius:6px;padding:6px 11px}
.mast nav a:hover,.mast nav a.on{background:#fff;color:var(--sign)}

/* section rule — uppercase blue heading with dashed sign line */
.rule{display:flex;align-items:center;gap:12px;margin:22px 0 12px}
.rule h2{margin:0;color:var(--sign);font-size:15px;font-weight:900;text-transform:uppercase;
  letter-spacing:.12em;white-space:nowrap}
.rule .ln{height:3px;flex:1;background:repeating-linear-gradient(90deg,var(--sign) 0 18px,transparent 18px 34px)}
.rule .sub{color:var(--mut);font-size:11px;font-weight:700;letter-spacing:.06em;
  font-family:'Overpass Mono',monospace;text-transform:uppercase}

/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:9px}
.card.pad{padding:14px 16px}

/* controls */
.seg{display:flex;gap:5px;flex-wrap:wrap}
.seg button,.chip{font-family:'Overpass',sans-serif;font-weight:800;font-size:12.5px;
  letter-spacing:.02em;background:var(--card);color:var(--ink2);border:1px solid var(--line);
  border-radius:7px;padding:7px 13px;cursor:pointer}
.seg button:hover,.chip:hover{border-color:var(--sign)}
.seg button.on,.chip.on{background:var(--sign);color:#fff;border-color:var(--sign)}
.lbl{font-family:'Overpass Mono',monospace;font-size:10.5px;font-weight:700;color:var(--mut);
  letter-spacing:.09em;text-transform:uppercase}
.btn{font-family:'Overpass',sans-serif;font-weight:900;font-size:13px;letter-spacing:.04em;
  background:var(--blue);color:#fff;border:0;border-radius:7px;padding:9px 16px;cursor:pointer}
.btn:hover{background:var(--navy)}
.btn.go{background:var(--sign)}.btn.go:hover{background:var(--sign-dk)}
.mono{font-family:'Overpass Mono',ui-monospace,monospace}

/* the interstate shield glyph, drawn in CSS — white shield, red crown, blue
   numerals. Used in the masthead and as the viewer's domain badge. */
.shield{flex:none;width:40px;height:44px;border-radius:6px;background:#fff;
  display:flex;flex-direction:column;align-items:center;justify-content:flex-end;
  padding-bottom:4px;box-shadow:0 2px 8px rgba(0,0,0,.3);position:relative;overflow:hidden}
.shield:before{content:"";position:absolute;top:0;left:0;right:0;height:12px;background:var(--red)}
.shield b{color:var(--sign);font-weight:900;font-size:15px;line-height:1;z-index:1;
  letter-spacing:-.02em}

/* ──────────────────────────────────────────────────────────────────────────
   Chart viewer — the map fills the viewport under a slim blue bar, with the
   forecast-hour scrubber pinned to the bottom. Fixed frames, so the image is
   just an <img> swap; no tiles, no map library, nothing to pan.
   ────────────────────────────────────────────────────────────────────────── */
.fs{height:100%;margin:0;overflow:hidden;display:flex;flex-direction:column}
html.fs,body.fs{height:100%}
.fstop{display:flex;align-items:center;gap:10px;padding:8px 15px;background:var(--sign);
  color:#fff;flex:0 0 auto;box-shadow:0 2px 12px rgba(0,0,0,.22);z-index:6;flex-wrap:wrap}
.fstop .word{font-weight:900;font-size:17px;color:#fff;letter-spacing:.01em;white-space:nowrap}
.fstop .word .yl{color:var(--sign-sub)}
.fstop .sp{flex:1 1 auto}
.fstop .lbl{font-size:9.5px;color:rgba(255,255,255,.62)}
.fstop select{font-family:'Overpass',sans-serif;font-weight:800;font-size:13px;color:var(--ink);
  border:2px solid #fff;border-radius:6px;padding:5px 8px;background:#fff;cursor:pointer;
  max-width:min(46vw,360px)}
.fstop a.nav,.fstop button.nav{font-family:'Overpass Mono',monospace;font-size:10.5px;
  font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:#eaf3ff;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.3);border-radius:6px;
  padding:6px 10px;cursor:pointer}
.fstop a.nav:hover,.fstop button.nav:hover,.fstop a.nav.on{background:#fff;color:var(--sign)}

/* ── viewer body: sticky left rail + stage ──────────────────────────────────
   Product switching is the primary action on this page, so the whole catalogue
   stays on screen as buttons. A <select> costs two clicks and hides every
   option you did not pick; a rail costs one click and shows the shape of the
   catalogue while you browse. The rail scrolls independently of the chart. */
.vbody{flex:1 1 auto;display:flex;min-height:0}
.side{flex:0 0 258px;background:var(--card);border-right:1px solid var(--line);
  overflow-y:auto;overscroll-behavior:contain;padding:0 0 18px}
.side::-webkit-scrollbar{width:9px}
.side::-webkit-scrollbar-thumb{background:var(--line);border-radius:5px}
.side h3{position:sticky;top:0;z-index:2;margin:0;padding:9px 13px 7px;
  background:var(--paper);border-bottom:1px solid var(--line);
  font-family:'Overpass Mono',monospace;font-size:9.5px;font-weight:700;
  letter-spacing:.11em;text-transform:uppercase;color:var(--mut)}
.side .grp{padding:7px 9px 3px;font-family:'Overpass Mono',monospace;font-size:9px;
  font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--mut)}

/* domain buttons — two per row, they are short and there are 21 */
.side .doms{display:grid;grid-template-columns:1fr 1fr;gap:4px;padding:6px 9px 2px}
.side .doms button{font-family:'Overpass',sans-serif;font-weight:800;font-size:11.5px;
  text-align:left;background:var(--paper);color:var(--ink2);border:1px solid var(--line);
  border-radius:6px;padding:6px 8px;cursor:pointer;line-height:1.2;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.side .doms button:hover{border-color:var(--sign);color:var(--sign)}
.side .doms button.on{background:var(--sign);color:#fff;border-color:var(--sign)}

/* tier filter chips — keeps 52 products navigable without a dropdown */
.side .tiers{display:flex;flex-wrap:wrap;gap:4px;padding:7px 9px 4px}
.side .tiers button{font-family:'Overpass Mono',monospace;font-size:9.5px;font-weight:700;
  letter-spacing:.05em;text-transform:uppercase;background:var(--paper);color:var(--mut);
  border:1px solid var(--line);border-radius:999px;padding:4px 9px;cursor:pointer}
.side .tiers button:hover{border-color:var(--sign);color:var(--sign)}
.side .tiers button.on{background:var(--sign);color:#fff;border-color:var(--sign)}

/* product buttons — full width, one line each, the working surface */
.side .prods{display:flex;flex-direction:column;gap:3px;padding:3px 9px 0}
.side .prods button{font-family:'Overpass',sans-serif;font-weight:700;font-size:12.5px;
  text-align:left;background:transparent;color:var(--ink);border:1px solid transparent;
  border-radius:6px;padding:6px 9px;cursor:pointer;line-height:1.3}
.side .prods button:hover{background:var(--paper);border-color:var(--line)}
.side .prods button.on{background:var(--sign);color:#fff;border-color:var(--sign);
  font-weight:800}
.side .prods button.miss{color:var(--mut)}
.side .prods button.on.miss{color:#dbe8f7}

.vmain{flex:1 1 auto;display:flex;flex-direction:column;min-width:0;min-height:0}

/* Below 900px the rail would eat the chart, so it becomes a drawer toggled
   from the top bar and overlays instead of displacing. */
.railtog{display:none}
@media(max-width:900px){
  .railtog{display:inline-block}
  .side{position:absolute;left:0;top:0;bottom:0;z-index:20;width:262px;flex-basis:262px;
    box-shadow:6px 0 26px rgba(0,0,0,.28);transform:translateX(-100%);
    transition:transform .18s ease}
  .side.open{transform:none}
  .vbody{position:relative}
}

/* stage — the chart itself, letterboxed on the neutral mat */
.stage{flex:1 1 auto;position:relative;background:var(--radar);overflow:hidden;
  display:flex;align-items:center;justify-content:center}
.stage img{max-width:100%;max-height:100%;width:auto;height:auto;display:block;
  image-rendering:auto}
/* the outgoing frame stays put underneath while the next decodes, so stepping
   never flashes the mat colour */
.stage img.under{position:absolute;inset:0;margin:auto;z-index:1}
.stage img.top{position:relative;z-index:2}
.stage .msg{color:#9fb4cc;font-family:'Overpass Mono',monospace;font-size:13px;
  text-align:center;padding:30px;max-width:60ch;line-height:1.7}
.stage .msg b{color:#fff}
.stage .msg code{background:rgba(255,255,255,.1);padding:2px 6px;border-radius:4px}
.spin{position:absolute;right:14px;top:12px;z-index:5;width:15px;height:15px;
  border:2px solid rgba(255,255,255,.25);border-top-color:#fff;border-radius:50%;
  animation:sp .7s linear infinite;opacity:0;transition:opacity .15s}
.spin.on{opacity:1}
@keyframes sp{to{transform:rotate(360deg)}}

/* Floating caption plate — model, cycle, valid time, attribution.
   Named .capplate, NOT .plate: this is a shared stylesheet, and a bare .plate
   here collided with the tile captions on the home page, absolutely positioning
   all 21 of them onto the document's top-left corner. Keep component classes
   in this file specific enough that a page can't accidentally claim them. */
.capplate{position:absolute;left:0;top:22px;z-index:4;display:flex;align-items:center;gap:14px;
  padding:11px 150px 11px 20px;pointer-events:none;color:#fff;max-width:88%;
  background:linear-gradient(90deg,rgba(0,40,92,.94) 0%,rgba(0,63,135,.90) 40%,
    rgba(10,92,168,.50) 70%,rgba(10,92,168,0) 100%);
  box-shadow:0 8px 26px rgba(0,0,0,.32);
  animation:sail .8s cubic-bezier(.2,.7,.2,1) both}
@keyframes sail{from{opacity:0;transform:translateX(-24px)}to{opacity:1;transform:none}}
.capplate .ptx{min-width:0}
.capplate .pttl{font-weight:900;font-size:clamp(17px,2.5vw,27px);line-height:1.1;
  letter-spacing:-.01em;text-shadow:0 2px 10px rgba(0,0,0,.4);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.capplate .psub{font-family:'Overpass Mono',monospace;font-size:10.5px;font-weight:700;
  letter-spacing:.11em;text-transform:uppercase;color:var(--sign-sub);margin-top:5px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* attribution is a licence condition, not decoration — it is burned into every
   rendered image, and repeated here for the page itself */
.attrib{position:absolute;right:10px;bottom:9px;z-index:4;font-family:'Overpass Mono',monospace;
  font-size:10px;color:rgba(255,255,255,.72);background:rgba(6,12,22,.55);
  border-radius:5px;padding:4px 9px;pointer-events:none}

/* scrubber — the primary control. Forecast hour, not wall time. */
.scrub{flex:0 0 auto;background:var(--card);border-top:1px solid var(--line);
  padding:9px 15px 11px;display:flex;align-items:center;gap:13px;flex-wrap:wrap;z-index:6}
/* Transport glyphs are deliberately limited to |, ◀ and ▶ -- the U+23EE/23ED
   "skip" characters are absent from common Linux font stacks and render as
   tofu boxes. These four compose the same meaning from glyphs that always
   exist. */
.scrub .tbtn{font-family:'Overpass Mono',monospace;font-size:11.5px;font-weight:700;
  background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:6px;
  width:40px;height:32px;cursor:pointer;line-height:1;padding:0;letter-spacing:-.5px}
.scrub .tbtn:hover{border-color:var(--sign);color:var(--sign)}
.scrub .tbtn.play{background:var(--sign);color:#fff;border-color:var(--sign);width:40px}
.scrub .tbtn.play:hover{background:var(--sign-dk);color:#fff}
.scrub .fh{font-family:'Overpass Mono',monospace;font-weight:700;font-size:13px;
  color:var(--sign);min-width:74px;text-align:center;white-space:nowrap}
.scrub .vt{font-family:'Overpass Mono',monospace;font-size:11.5px;color:var(--ink2);
  white-space:nowrap}
.scrub .vt b{color:var(--ink)}
.scrub input[type=range]{flex:1 1 260px;min-width:180px;accent-color:var(--sign);height:26px}
.scrub .spd{font-family:'Overpass Mono',monospace;font-size:10.5px;font-weight:700;
  color:var(--mut);background:var(--paper);border:1px solid var(--line);border-radius:6px;
  padding:6px 9px;cursor:pointer}
.scrub .spd:hover{border-color:var(--sign);color:var(--sign)}

/* day ticks under the range input — the 3h→6h break at 144h is visible */
.ticks{flex:1 1 100%;display:flex;justify-content:space-between;
  font-family:'Overpass Mono',monospace;font-size:9.5px;color:var(--mut);
  letter-spacing:.04em;margin:-4px 2px 0}

@media(max-width:760px){
  .plate{padding-right:60px;max-width:96%;top:12px}
  .fstop .lbl{display:none}
  .scrub .vt{flex:1 1 100%;order:9}
}

/* footer */
footer{margin-top:34px;background:var(--ink);color:#cbccd0;border-top:4px solid var(--sign);
  padding:20px 0;font-size:12.5px}
footer .fw{font-weight:900;font-size:19px;color:#fff}
footer .fw .yl{color:var(--sign-sub)}
footer a{color:#cbccd0}footer a:hover{color:var(--sign-sub)}