/* RUDO Weather Challenge · shared design tokens + base (single source for all pages).
   Brand: m8201 BRAND_SPEC_v1 — gold #d4a82a is the only UI accent; casque #a8392c only on the bird;
   never pure-white background; zero emoji. */
:root{
  --paper:#f4ece0; --paper-cream:#f8f1e1; --paper-cool:#fbfaf7; --card:#fbf7ef;
  --ink:#14171f; --slate:#575f6e; --slate-2:#6b7180; --line:#e2d8c6;
  --navy:#08245a; --navy-deep:#061634; --on-navy:#eef2fb; --lh-navy:#1a2744;
  --gold:#d4a82a; --gold-deep:#a8841c; --gold-soft:#f3e6bd;
  --moss-100:#eef2e6; --moss-300:#c5d4b3; --moss-500:#8fa67a; --moss-700:#4a5d3a; --moss-900:#1f2a18;
  --ok:#3f7a3a; --warn:#7d6212; --bad:#8a3b2e; --info:#2e5f8a;
  --sea:#2e8a87;
  --radius:14px; --radius-sm:8px; --shadow:0 1px 2px rgba(20,23,31,.06),0 6px 24px rgba(20,23,31,.06);
  --font-body:'DM Sans','Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --font-display:'Instrument Serif','Noto Serif SC',Georgia,serif;
  --font-mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --maxw:1120px;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#10141c; --paper-cream:#151a24; --paper-cool:#161b25; --card:#1a2030;
  --ink:#eef2fb; --slate:#b4bccb; --slate-2:#9aa3b4; --line:#2a3245;
  --gold-soft:#3a3218; --moss-100:#1c2418; --ok:#86c97f; --warn:#e3c25a; --bad:#ec9a8a; --info:#8db8e6; color-scheme:dark;}}
:root[data-theme="dark"]{--paper:#10141c; --paper-cream:#151a24; --paper-cool:#161b25; --card:#1a2030;
  --ink:#eef2fb; --slate:#b4bccb; --slate-2:#9aa3b4; --line:#2a3245; --gold-soft:#3a3218; --moss-100:#1c2418; --ok:#86c97f; --warn:#e3c25a; --bad:#ec9a8a; --info:#8db8e6; color-scheme:dark;}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 var(--font-body)}
a{color:var(--navy);text-underline-offset:3px}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) a{color:#9fb8e8}}
:root[data-theme="dark"] a{color:#9fb8e8}
h1,h2,h3{font-family:var(--font-display);font-weight:400;line-height:1.15;margin:.2em 0 .4em}
h1{font-size:clamp(2rem,5vw,3.2rem)} h2{font-size:clamp(1.5rem,3.4vw,2.2rem)} h3{font-size:1.3rem}
code,.mono,.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.btn{display:inline-flex;align-items:center;gap:.4em;border:1px solid var(--ink);background:transparent;color:var(--ink);
  border-radius:999px;padding:.55em 1.1em;font:600 15px var(--font-body);cursor:pointer;text-decoration:none}
.btn-primary{background:var(--gold);border-color:var(--gold);color:#1a1a22}
.btn-primary:hover{background:var(--gold-deep);border-color:var(--gold-deep)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.pill{display:inline-block;font:600 12px var(--font-mono);letter-spacing:.04em;padding:.15em .6em;border-radius:999px;border:1px solid var(--line);color:var(--slate)}
.pill.ok{color:var(--ok);border-color:var(--ok)} .pill.warn{color:var(--warn);border-color:var(--warn)} .pill.bad{color:var(--bad);border-color:var(--bad)}
.muted{color:var(--slate)} .small{font-size:.875rem}
.grid{display:grid;gap:16px} @media(min-width:760px){.grid.c2{grid-template-columns:1fr 1fr}.grid.c3{grid-template-columns:repeat(3,1fr)}}
input,select,textarea{font:inherit;color:var(--ink);background:var(--paper-cool);border:1px solid var(--line);border-radius:var(--radius-sm);padding:.55em .7em;max-width:100%}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) input,:root:not([data-theme="light"]) select,:root:not([data-theme="light"]) textarea{background:#0e121a}}
:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
table{border-collapse:collapse;width:100%} th,td{text-align:left;padding:.5em .6em;border-bottom:1px solid var(--line)} th{font-size:.8rem;color:var(--slate);text-transform:uppercase;letter-spacing:.05em}
/* site chrome */
.site-head{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--paper) 92%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-head .wrap{display:flex;align-items:center;gap:16px;min-height:64px;flex-wrap:wrap}
.site-head .logo img{height:36px;width:auto;display:block}
.site-head nav{display:flex;gap:4px 14px;flex-wrap:wrap;margin-left:auto;font-weight:600;font-size:.95rem}
.site-head nav a{color:var(--ink);text-decoration:none;padding:.3em 0;border-bottom:2px solid transparent}
.site-head nav a[aria-current="page"],.site-head nav a:hover{border-bottom-color:var(--gold)}
.site-foot{margin-top:64px;padding:32px 0;border-top:1px solid var(--line);color:var(--slate);font-size:.875rem}
.disclaimer{font-size:.85rem;color:var(--slate)}
/* a11y (axe WCAG AA): buttons keep their own colors in every theme; in-text links are underlined */
a.btn{color:var(--ink)} a.btn-primary,a.btn-primary:visited{color:#1a1a22 !important}
p a:not(.btn),li a:not(.btn),td a:not(.btn),.crumbs a,nav[aria-label*="readcrumb"] a,.breadcrumb a{text-decoration:underline !important}