/* 180 Prep — shared styles for the free public tools. Mirrors the landing palette. */
:root{
  --ink:#151426; --paper:#EEEDF4; --card:#FFFFFF; --card2:#F7F6FC;
  --rule:#DAD7E6; --rule2:#EAE8F2;
  --accent:#4B39D0; --accent-2:#7A63F7; --accent-soft:#E9E5FB;
  --accent-grad:linear-gradient(135deg,#5645DE 0%,#7C63F7 100%);
  --on-accent:#FFFFFF;
  --verify:#0A7360; --verify-soft:#DEF1EC;
  --muted:#5C5875; --faint:#8B87A0;
  --shadow:0 1px 2px rgba(21,20,38,.05), 0 12px 34px -16px rgba(21,20,38,.22);
  --shadow-lg:0 2px 4px rgba(21,20,38,.06), 0 28px 60px -22px rgba(21,20,38,.30);
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --ink:#ECEAF6; --paper:#0F0E1C; --card:#1A1830; --card2:#211E3A;
  --rule:#332F4E; --rule2:#282444;
  --accent:#A797FF; --accent-2:#8E7DFF; --accent-soft:#26214A;
  --accent-grad:linear-gradient(135deg,#8B79FF 0%,#B3A6FF 100%);
  --on-accent:#161230;
  --verify:#45C6AC; --verify-soft:#12302C;
  --muted:#A7A2C2; --faint:#7C7799;
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 12px 34px -16px rgba(0,0,0,.62);
  --shadow-lg:0 2px 4px rgba(0,0,0,.5), 0 30px 64px -22px rgba(0,0,0,.75);
}}
:root[data-theme="dark"]{
  --ink:#ECEAF6; --paper:#0F0E1C; --card:#1A1830; --card2:#211E3A;
  --rule:#332F4E; --rule2:#282444;
  --accent:#A797FF; --accent-2:#8E7DFF; --accent-soft:#26214A;
  --accent-grad:linear-gradient(135deg,#8B79FF 0%,#B3A6FF 100%);
  --on-accent:#161230;
  --verify:#45C6AC; --verify-soft:#12302C;
  --muted:#A7A2C2; --faint:#7C7799;
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 12px 34px -16px rgba(0,0,0,.62);
  --shadow-lg:0 2px 4px rgba(0,0,0,.5), 0 30px 64px -22px rgba(0,0,0,.75);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);
  font-family:"Public Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  line-height:1.55;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:920px;margin:0 auto;padding:0 22px}
h1,h2,h3{font-family:Fraunces,Georgia,serif;letter-spacing:-.01em;line-height:1.1}
h1{font-size:clamp(30px,5vw,46px);font-weight:900;margin:0 0 12px}
h2{font-size:clamp(22px,3.4vw,30px);font-weight:800;margin:34px 0 10px}
h3{font-size:19px;font-weight:800;margin:0 0 6px}
.mono{font-family:"JetBrains Mono",ui-monospace,monospace}
.nav{position:sticky;top:0;z-index:50;background:color-mix(in oklab,var(--paper) 86%,transparent);
  backdrop-filter:saturate(1.2) blur(10px);border-bottom:1px solid var(--rule)}
.nav-in{display:flex;align-items:center;gap:14px;max-width:1080px;margin:0 auto;padding:12px 22px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;color:var(--ink)}
.brand:hover{text-decoration:none}
.badge{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:8px;
  background:var(--accent-grad);color:#fff;font-family:Fraunces,serif;font-weight:900;font-size:14px}
.nav-links{display:flex;gap:6px;margin-left:auto;align-items:center}
.btn{display:inline-flex;align-items:center;gap:8px;border:1px solid transparent;border-radius:11px;
  padding:10px 16px;font:inherit;font-size:14.5px;font-weight:600;cursor:pointer;white-space:nowrap;transition:.14s}
.btn-ghost{background:transparent;border-color:var(--rule);color:var(--ink)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}
.btn-solid{background:var(--accent);color:var(--on-accent)}
.btn-solid:hover{filter:brightness(1.05);text-decoration:none;transform:translateY(-1px)}
.btn-lg{padding:13px 22px;font-size:16px;border-radius:13px}
.phead{padding:44px 0 8px;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:700;letter-spacing:.04em;
  text-transform:uppercase;color:var(--accent);background:var(--accent-soft);border-radius:999px;padding:5px 13px;margin-bottom:16px}
.phead p.sub{color:var(--muted);font-size:18px;max-width:46ch;margin:0 auto}
.card{background:var(--card);border:1px solid var(--rule);border-radius:18px;box-shadow:var(--shadow);padding:26px}
.tool{margin:26px 0}
.seg{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.seg button{border:1px solid var(--rule);background:var(--card);color:var(--ink);border-radius:11px;
  padding:9px 15px;font:inherit;font-size:14px;font-weight:600;cursor:pointer;transition:.12s}
.seg button:hover{border-color:var(--accent)}
.seg button.on{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}
label.fld{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:600;color:var(--muted)}
input,select{font:inherit;font-size:16px;padding:11px 13px;border:1px solid var(--rule);border-radius:11px;
  background:var(--card2);color:var(--ink);width:100%}
input:focus,select:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:560px){.grid2{grid-template-columns:1fr}}
.result{margin-top:20px;border-radius:14px;border:1px solid var(--rule);background:var(--card2);padding:20px 22px}
.big-num{font-family:Fraunces,serif;font-size:48px;font-weight:900;line-height:1;color:var(--accent)}
.result .lbl{font-size:12.5px;color:var(--muted);letter-spacing:.03em;text-transform:uppercase}
.pctbar{height:12px;border-radius:7px;background:var(--rule2);overflow:hidden;margin:12px 0 4px}
.pctbar i{display:block;height:100%;background:var(--accent-grad);border-radius:7px}
.hint{color:var(--muted);font-size:13.5px}
.cta{margin:34px 0;background:var(--accent-soft);border:1px solid color-mix(in oklab,var(--accent) 22%,transparent);
  border-radius:18px;padding:26px;text-align:center}
.cta h2{margin:0 0 8px}
.cta p{color:var(--muted);max-width:48ch;margin:0 auto 16px}
.finetxt{color:var(--muted);font-size:13px;line-height:1.6}
.finetxt a{text-decoration:underline}
.tgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px;margin:26px 0}
.tcard{display:block;background:var(--card);border:1px solid var(--rule);border-radius:16px;padding:22px;box-shadow:var(--shadow);color:var(--ink)}
.tcard:hover{text-decoration:none;border-color:var(--accent);transform:translateY(-2px);transition:.15s}
.tcard h3{color:var(--ink)}
.tcard p{color:var(--muted);font-size:14px;margin:4px 0 0}
.tcard .ti{width:40px;height:40px;border-radius:11px;background:var(--accent-soft);color:var(--accent);
  display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.opt{display:flex;gap:12px;align-items:flex-start;width:100%;text-align:left;border:1px solid var(--rule);
  background:var(--card);border-radius:12px;padding:13px 15px;margin:8px 0;cursor:pointer;font:inherit;color:var(--ink);transition:.12s}
.opt:hover{border-color:var(--accent)}
.opt .k{font-weight:800;color:var(--muted)}
.opt.correct{border-color:var(--verify);background:var(--verify-soft)}
.opt.wrong{border-color:#c0392b;background:color-mix(in oklab,#c0392b 8%,transparent)}
.opt.dim{opacity:.6}
.explain{margin-top:16px;border-left:3px solid var(--accent);background:var(--card2);border-radius:0 12px 12px 0;padding:14px 18px}
.explain b{color:var(--ink)}
footer{border-top:1px solid var(--rule);margin-top:50px;padding:30px 0 46px}
footer .wrap{display:flex;flex-wrap:wrap;gap:8px 22px;align-items:center}
footer a{color:var(--muted);font-size:14px}
footer .fnote{color:var(--faint);font-size:12.5px;width:100%;margin-top:8px}
.plan-week{display:flex;gap:14px;align-items:baseline;padding:12px 0;border-top:1px solid var(--rule)}
.plan-week .wk{font-weight:800;color:var(--accent);min-width:74px;font-size:13px}
.plan-week b{font-size:14.5px}
.plan-week span{display:block;color:var(--muted);font-size:13px;margin-top:2px}