/* CloudKlass Academy brand tokens (BRAND.md v1) + Research Clinic accent. */
:root{
  --ck-blue:#2563eb; --ck-blue-deep:#1d4ed8; --ck-blue-50:#eff6ff;
  --ck-green:#10b981; --ck-green-50:#ecfdf5;
  --ck-amber:#f59e0b; --ck-amber-50:#fffbeb; --ck-amber-ink:#92400e;
  --ck-ink:#0f172a; --ck-text:#1e293b; --ck-muted:#64748b;
  --ck-bg:#f8fafc; --ck-bg-alt:#f1f5f9; --ck-border:#e2e8f0;
  --ck-font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;
  --ck-r-btn:10px; --ck-r-card:16px; --ck-r-panel:20px;

  /* Research Clinic accent — the third product accent. Not blue (Teacher AI),
     not amber (CertPrep), and never green (reserved for success states). */
  --rc:#7c3aed; --rc-deep:#6d28d9; --rc-50:#f5f3ff; --rc-line:#ddd6fe;

  /* Aliases the clinic page uses, mapped onto the brand. */
  --paper:var(--ck-bg); --surface:#ffffff; --surface-2:var(--ck-bg-alt); --surface-3:var(--ck-border);
  --ink:var(--ck-text); --ink-2:#475569; --ink-3:var(--ck-muted);
  --rule:var(--ck-border); --rule-strong:#cbd5e1;
  --brass:var(--rc); --brass-soft:var(--rc-50); --brass-line:var(--rc-line);
  --ok:#047857; --ok-soft:var(--ck-green-50);
  --warn:var(--ck-amber-ink); --warn-soft:var(--ck-amber-50);
  --break:#b91c1c; --break-soft:#fef2f2;
}
*{box-sizing:border-box}
body{margin:0;background:var(--ck-bg);color:var(--ck-text);
  font-family:var(--ck-font);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--rc)}

.topbar{display:flex;flex-wrap:wrap;gap:.6rem 1.4rem;align-items:center;
  max-width:64rem;margin:0 auto;padding:.9rem 1.15rem;border-bottom:1px solid var(--ck-border)}
.topbar .brand{display:flex;align-items:center;gap:.55rem;text-decoration:none;color:var(--ck-muted);
  font-size:.9rem;font-weight:600}
.topbar .brand b{color:var(--rc);font-weight:700}
.logo{height:26px;width:auto;display:block}
.footlogo{height:22px;margin-bottom:.4rem}
.navlinks{margin-left:auto;display:flex;flex-wrap:wrap;gap:1.1rem;align-items:center;font-size:.88rem}
.navlinks a{color:var(--ck-muted);text-decoration:none;font-weight:500}
.navlinks a:hover,.navlinks a.on{color:var(--rc)}
.rcuser{font-size:.8rem;color:var(--ck-muted);display:flex;align-items:center;gap:.5rem}
.rcuser button{font:inherit;font-size:.78rem;background:none;border:0;color:var(--rc);cursor:pointer;padding:0;text-decoration:underline}

h1{font-size:clamp(2rem,5vw,3rem);font-weight:800;line-height:1.08;letter-spacing:-.022em;
  margin:2.4rem 0 .8rem;text-wrap:balance;max-width:20ch;color:var(--ck-ink)}
h2{font-size:1.6rem;font-weight:700;margin:2.6rem 0 .7rem;letter-spacing:-.014em;color:var(--ck-ink)}
h3{font-size:1.05rem;font-weight:600;margin:1.7rem 0 .4rem;color:var(--ck-ink)}
.lede{font-size:1.15rem;line-height:1.55;color:var(--ck-muted);max-width:48ch;font-weight:400}
p{max-width:38rem}
.eyebrow{font-size:.72rem;letter-spacing:.13em;text-transform:uppercase;color:var(--rc);
  font-weight:700;margin-top:2.4rem}
.muted{color:var(--ck-muted)} .small{font-size:.88rem}
.wrap{max-width:52rem;margin:0 auto;padding:0 1.15rem 4rem}
.wrap.wide{max-width:64rem}

.btn{display:inline-block;font-size:.92rem;font-weight:600;padding:.72rem 1.25rem;
  border:1px solid var(--rc);background:var(--rc);color:#fff;border-radius:var(--ck-r-btn);
  text-decoration:none;margin:1.2rem .5rem 0 0;cursor:pointer}
.btn:hover{background:var(--rc-deep);border-color:var(--rc-deep)}
.btn.ghost{background:#fff;color:var(--ck-text);border-color:var(--ck-border)}
.btn.ghost:hover{background:var(--ck-bg-alt)}
.btn.google{background:#fff;color:var(--ck-text);border-color:var(--ck-border);
  display:inline-flex;align-items:center;gap:.6rem;width:100%;justify-content:center;margin-right:0}

.cards{display:grid;gap:.8rem;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));margin:1.3rem 0}
.card{border:1px solid var(--ck-border);background:#fff;border-radius:var(--ck-r-card);padding:1.1rem 1.15rem}
.card h3{margin:0 0 .35rem;font-size:.98rem}
.card p{font-size:.89rem;color:var(--ck-muted);margin:0;max-width:none}

.tscroll{overflow-x:auto;border:1px solid var(--ck-border);background:#fff;margin:1.4rem 0;border-radius:var(--ck-r-card)}
table{border-collapse:collapse;width:100%;font-size:.9rem;min-width:34rem}
th,td{text-align:left;padding:.65rem .85rem;border-bottom:1px solid var(--ck-border);vertical-align:top}
thead th{font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;font-weight:700;
  color:var(--ck-muted);background:var(--ck-bg-alt)}
tbody tr:last-child td{border-bottom:0}
td.n{font-variant-numeric:tabular-nums;white-space:nowrap}
.price{font-weight:700;white-space:nowrap;color:var(--ck-ink)}

.note{border:1px solid var(--rc-line);background:var(--rc-50);padding:1rem 1.15rem;
  border-radius:var(--ck-r-panel);margin:1.5rem 0;max-width:44rem}
.note p{margin:0;font-size:.93rem;color:var(--ck-text);max-width:none}

.chip{display:inline-block;font-size:.68rem;font-weight:700;letter-spacing:.04em;
  text-transform:uppercase;padding:.22em .6em;border-radius:999px;white-space:nowrap}
.chip.live{background:var(--ck-green-50);color:#047857}
.chip.soon{background:var(--ck-bg-alt);color:var(--ck-muted)}

.hlist{display:grid;gap:.6rem;grid-template-columns:repeat(auto-fit,minmax(16rem,1fr));margin:1.3rem 0}
.hlist a{display:block;border:1px solid var(--ck-border);background:#fff;border-radius:var(--ck-r-card);
  padding:.85rem .95rem;text-decoration:none;color:var(--ck-text)}
.hlist a:hover{border-color:var(--rc);box-shadow:0 1px 3px rgba(124,58,237,.12)}
.hlist .n{font-weight:600;font-size:.95rem;display:block;color:var(--ck-ink)}
.hlist .d{font-size:.8rem;color:var(--ck-muted);display:block;margin-top:.22rem}

ul.plain{list-style:none;padding:0;max-width:38rem}
ul.plain li{display:flex;gap:.65rem;padding:.45rem 0;border-bottom:1px solid var(--ck-border);font-size:.94rem}
ul.plain li::before{content:"\2192";color:var(--rc);flex:none;font-weight:700}

.sitefoot{border-top:1px solid var(--ck-border);margin-top:3rem;padding:1.8rem 1.15rem 3rem;
  max-width:64rem;margin-left:auto;margin-right:auto;display:grid;gap:1.2rem;
  grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));font-size:.85rem;color:var(--ck-muted);
  background:var(--ck-bg-alt)}
.sitefoot a{color:var(--ck-muted)}

/* auth */
.authbox{max-width:24rem;margin:2rem auto;background:#fff;border:1px solid var(--ck-border);
  border-radius:var(--ck-r-panel);padding:1.6rem}
.authbox h1{font-size:1.5rem;margin:0 0 .4rem;max-width:none}
.authbox .lede{font-size:.95rem;margin-bottom:1.2rem}
.authbox label{display:block;font-size:.78rem;font-weight:600;color:var(--ck-muted);margin:.9rem 0 .3rem}
.authbox input{width:100%;font:inherit;font-size:.95rem;padding:.62rem .7rem;
  border:1px solid var(--ck-border);border-radius:var(--ck-r-btn);background:#fff;color:var(--ck-text)}
.authbox input:focus{outline:2px solid var(--rc);outline-offset:1px;border-color:var(--rc)}
.authbox .btn{width:100%;margin:1.1rem 0 0;text-align:center}
.divider{display:flex;align-items:center;gap:.7rem;margin:1.1rem 0;color:var(--ck-muted);font-size:.78rem}
.divider::before,.divider::after{content:"";flex:1;height:1px;background:var(--ck-border)}
.autherr{background:#fef2f2;border:1px solid #fecaca;color:#b91c1c;padding:.6rem .8rem;
  border-radius:var(--ck-r-btn);font-size:.87rem;margin-top:1rem}
.authtabs{display:flex;gap:.4rem;margin-bottom:.4rem}
.authtabs button{flex:1;font:inherit;font-size:.88rem;font-weight:600;padding:.5rem;cursor:pointer;
  background:none;border:0;border-bottom:2px solid var(--ck-border);color:var(--ck-muted)}
.authtabs button.active{color:var(--rc);border-bottom-color:var(--rc)}
[hidden]{display:none!important}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}