/* ── the institutional design system · ONE vocabulary for every LU surface ─────────────────── */
:root{
  color-scheme:dark light;
  --bg:#0a111f;--bg-glow:rgba(91,140,255,.16);--surface:#101a2e;--surface-2:#0d1626;
  --fg:#e9eef7;--fg-strong:#ffffff;--muted:#9fb0c9;--line:#1e2b44;--line-strong:#2c3d5e;
  --brand:#5b8cff;--brand-600:#3f70f0;--brand-ink:#ffffff;--accent:#34d399;--danger:#f0656f;
  --ring:0 0 0 2px var(--bg),0 0 0 4.5px var(--brand);
  --shadow-1:0 1px 2px rgba(2,6,16,.4),0 2px 12px rgba(2,6,16,.28);
  --shadow-2:0 2px 6px rgba(2,6,16,.45),0 14px 34px rgba(2,6,16,.4);
  --glass:rgba(10,17,31,.82);
  --radius-s:8px;--radius:12px;--radius-l:16px;
  --maxw:1120px;--measure:68ch;
  --step--1:clamp(.83rem,.8rem + .15vw,.9rem);--step-0:clamp(1rem,.96rem + .2vw,1.0625rem);
  --step-1:clamp(1.15rem,1.05rem + .5vw,1.35rem);--step-2:clamp(1.45rem,1.25rem + 1vw,1.9rem);
  --step-3:clamp(1.9rem,1.5rem + 2vw,2.6rem);--step-4:clamp(2.35rem,1.7rem + 3.2vw,3.4rem);
  --space-s:clamp(14px,1.4vw,20px);--space-m:clamp(24px,3vw,40px);--space-l:clamp(44px,6vw,76px);
  --sans:ui-sans-serif,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
}
@media (prefers-color-scheme:light){:root{
  --bg:#fafbfe;--bg-glow:rgba(63,112,240,.10);--surface:#ffffff;--surface-2:#f3f6fb;
  --fg:#1a2437;--fg-strong:#0b1428;--muted:#5a6b85;--line:#e3e9f2;--line-strong:#c9d4e6;
  --brand:#3f70f0;--brand-600:#2f5cd6;--accent:#0f9d6f;--danger:#d54550;
  --ring:0 0 0 2px var(--bg),0 0 0 4.5px var(--brand);
  --shadow-1:0 1px 2px rgba(23,36,64,.06),0 2px 10px rgba(23,36,64,.07);
  --shadow-2:0 3px 8px rgba(23,36,64,.09),0 16px 36px rgba(23,36,64,.12);
  --glass:rgba(250,251,254,.85);
}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);font-size:var(--step-0);color:var(--fg);line-height:1.65;
  background:radial-gradient(1100px 480px at 50% -140px,var(--bg-glow),transparent 70%) no-repeat,var(--bg);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
::selection{background:var(--brand);color:var(--brand-ink)}
:focus{outline:none}:focus-visible{box-shadow:var(--ring);border-radius:6px}
.wrap{max-width:var(--maxw);margin:0 auto;padding-left:max(22px,env(safe-area-inset-left));padding-right:max(22px,env(safe-area-inset-right))}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1.5px}
/* ── accessibility · the skip-link is a first-class element ── */
.skip{position:absolute;left:-9999px;top:0;background:var(--brand);color:var(--brand-ink);padding:12px 18px;z-index:100;border-radius:0 0 10px 0;font-weight:600}
.skip:focus{left:0;top:0}
/* ── the glass header ── */
header{border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50;background:var(--glass);backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px)}
header nav{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;padding:14px 0;gap:10px 18px}
.brand{font-weight:800;font-size:1.15rem;letter-spacing:-.015em;color:var(--fg-strong);display:inline-flex;align-items:center;gap:.5em}
.brand::before{content:'';width:.55em;height:.55em;border-radius:3px;background:linear-gradient(135deg,var(--brand),var(--accent));box-shadow:0 0 10px var(--bg-glow)}
.links{display:flex;flex-wrap:wrap;gap:4px}
.links a{color:var(--muted);padding:8px 12px;border-radius:9px;font-weight:500;min-height:44px;display:inline-flex;align-items:center}
.links a:hover{color:var(--fg-strong);background:var(--surface-2);text-decoration:none}
/* ── typography · fluid · balanced · a readable measure ── */
h1{font-size:var(--step-4);line-height:1.06;letter-spacing:-.028em;margin:.2em 0;color:var(--fg-strong);text-wrap:balance}
h2{font-size:var(--step-2);line-height:1.15;letter-spacing:-.018em;color:var(--fg-strong);text-wrap:balance}
h3{font-size:var(--step-1);letter-spacing:-.008em;color:var(--fg-strong)}
p{max-width:var(--measure)}
.eyebrow{color:var(--accent);font-weight:700;text-transform:uppercase;letter-spacing:.12em;font-size:var(--step--1)}
.lede{color:var(--muted);font-size:var(--step-1);line-height:1.55;max-width:56ch}
h2.sec{display:flex;align-items:center;gap:.55em}
h2.sec::before{content:'';width:22px;height:3px;border-radius:2px;background:linear-gradient(90deg,var(--brand),var(--accent))}
/* ── the hero ── */
.hero{padding:var(--space-l) 0 var(--space-m)}
.hero p{color:var(--muted);font-size:var(--step-1);max-width:56ch}
/* ── actions · cta + pick share ONE button language (hover lift · press · ring) ── */
.cta,.pick,button,.buy button{display:inline-flex;align-items:center;justify-content:center;gap:.5em;margin-top:14px;
  padding:12px 22px;min-height:46px;border:1px solid transparent;border-radius:11px;cursor:pointer;
  background:linear-gradient(180deg,var(--brand),var(--brand-600));color:var(--brand-ink);font:inherit;font-weight:650;
  box-shadow:var(--shadow-1);transition:transform .16s ease,box-shadow .16s ease,filter .16s ease}
.cta:hover,.pick:hover,button:hover{filter:brightness(1.07);box-shadow:var(--shadow-2);transform:translateY(-1px);text-decoration:none}
.cta:active,.pick:active,button:active{transform:translateY(0) scale(.99);box-shadow:var(--shadow-1)}
.cta.alt,.pick.alt{background:transparent;border-color:var(--line-strong);color:var(--fg);margin-left:8px;box-shadow:none}
.cta.alt:hover,.pick.alt:hover{border-color:var(--brand);color:var(--fg-strong);filter:none}
/* ── trust strip · pill chips ── */
.trust{display:flex;flex-wrap:wrap;gap:10px;margin-top:var(--space-m)}
.trust span{border:1px solid var(--line);background:var(--surface-2);color:var(--muted);border-radius:999px;padding:7px 14px;font-size:var(--step--1);font-weight:550}
/* ── structure · bands + grids + cards + tiers ── */
.band{border-top:1px solid var(--line);padding:var(--space-l) 0}
.grid,.prices{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(250px,100%),1fr));gap:var(--space-s);margin-top:var(--space-m)}
.card,.tier{background:linear-gradient(180deg,var(--surface),var(--surface-2));border:1px solid var(--line);border-radius:var(--radius-l);padding:clamp(18px,2.4vw,26px);box-shadow:var(--shadow-1);transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease}
.card:hover,.tier:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow-2)}
.card .n{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand-600));color:var(--brand-ink);font-weight:800;box-shadow:var(--shadow-1)}
.card p,.tier p{color:var(--muted)}
.tier .price{font-size:var(--step-3);font-weight:800;letter-spacing:-.02em;color:var(--fg-strong);font-variant-numeric:tabular-nums}
.tier .price span{font-size:var(--step-0);color:var(--muted);font-weight:500}
/* ── financial tables · tabular numerals · zebra · band-scroll on small screens (semantics preserved) ── */
table{width:100%;border-collapse:collapse;margin-top:var(--space-s);font-variant-numeric:tabular-nums;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
th{font-size:var(--step--1);text-transform:uppercase;letter-spacing:.07em;color:var(--muted);text-align:left;font-weight:650}
th,td{padding:12px 16px;border-bottom:1px solid var(--line)}
tbody tr:nth-child(even){background:var(--surface-2)}
tbody tr:last-child td{border-bottom:none}
td[data-cell]{text-align:right;font-weight:650;color:var(--fg-strong)}
/* ── forms · functional states engineered (focus · user-invalid) ── */
form{display:grid;gap:10px;max-width:480px;margin-top:var(--space-s)}
label{font-size:var(--step--1);font-weight:650;color:var(--fg);margin-top:4px}
input,textarea,select{font:inherit;color:var(--fg);background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:12px 14px;min-height:46px;width:100%;transition:border-color .16s ease,box-shadow .16s ease}
textarea{min-height:104px;resize:vertical}
input::placeholder,textarea::placeholder{color:var(--muted)}
input:focus-visible,textarea:focus-visible,select:focus-visible{border-color:var(--brand);box-shadow:var(--ring)}
input:user-invalid,textarea:user-invalid{border-color:var(--danger)}
.buy{margin-top:10px}
/* ── faq + notes ── */
.faq{display:grid;gap:14px;margin-top:var(--space-s);max-width:var(--measure)}
.faq .q{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.faq .q b{color:var(--fg-strong)}
.faq .q p{color:var(--muted);margin:.5em 0 0}
.note{color:var(--muted);font-size:var(--step--1);max-width:var(--measure)}
/* ── footer ── */
footer{border-top:1px solid var(--line);padding:var(--space-m) 0 max(var(--space-m),env(safe-area-inset-bottom));color:var(--muted);margin-top:var(--space-l)}
footer .foot{display:flex;flex-wrap:wrap;gap:12px 18px;align-items:center;justify-content:space-between}
footer a{color:var(--muted)}footer a:hover{color:var(--fg-strong)}
.inst{display:flex;flex-wrap:wrap;gap:12px}
/* ── all-device engineering ── */
@media (max-width:880px){.hero{padding:var(--space-m) 0}}
@media (max-width:640px){
  .links a{padding:8px 10px}
  .cta.alt,.pick.alt{margin-left:0}
  .band{overflow-x:auto}
  form{max-width:100%}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,::before,::after{transition:none!important;animation:none!important}
  .card:hover,.tier:hover,.cta:hover,.pick:hover,button:hover{transform:none}
}
@media print{
  header,footer,.skip,.cta,.pick,button{display:none!important}
  body{background:#fff;color:#111}
  .card,.tier,table{border-color:#bbb;box-shadow:none;background:#fff}
}