/* Euclid — marketing site. Sibling to Pascal; indigo→violet "proof" identity.
   Tokens trace to marketing/BRAND.md. */
:root{
  --ink:#0B0F1A; --ink-2:#111827; --paper:#ffffff; --paper-2:#F6F8FB;
  --muted:#5B6676; --line:#E6EBF2;
  --brand:#4338CA; --brand-bright:#5b54e6; --brand-2:#7B3FF2;
  --accent:#12B886; --signal:#1F6FEB; --warn:#E8943A;
  --maxw:1180px;
  --shadow-media:0 40px 80px -30px rgba(7,10,25,.6), 0 12px 30px -18px rgba(7,10,25,.5);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--ink); background:var(--paper); line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.brand{font-family:'Space Grotesk','Inter',sans-serif;letter-spacing:-.02em;margin:0 0 .4em;font-weight:600}
h1{font-size:clamp(2.5rem,5.4vw,4.2rem);line-height:1.04;font-weight:700}
h2{font-size:clamp(1.8rem,3.2vw,2.6rem);line-height:1.1}
h3{font-size:1.12rem}
p{margin:0 0 1em;color:#28313f}
.muted{color:var(--muted)}
a{color:var(--brand);text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.eyebrow{display:inline-block;padding:6px 14px;border-radius:999px;font-size:.8rem;font-weight:600;letter-spacing:.03em;text-transform:uppercase}
.mono{font-family:'JetBrains Mono',ui-monospace,Menlo,monospace}

/* ---------- Nav ---------- */
nav{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.8);backdrop-filter:saturate(150%) blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:13px 24px;display:flex;align-items:center;justify-content:space-between}
.brand{font-size:1.4rem;font-weight:700;display:inline-flex;align-items:center;gap:10px;color:var(--ink)}
.brand img{width:24px;height:24px;filter:drop-shadow(0 2px 5px rgba(67,56,202,.35))}
.nav-links{display:flex;gap:28px;font-size:.92rem;color:#47526a}
.nav-links a{color:#47526a}.nav-links a:hover{color:var(--ink)}
.nav-cta{background:var(--ink);color:#fff !important;padding:9px 17px;border-radius:999px;font-size:.88rem;font-weight:600}
.nav-cta:hover{background:var(--brand)}
@media(max-width:760px){.nav-links{display:none}}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:999px;font-weight:600;font-size:.95rem;border:1px solid transparent;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,background .15s ease}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 16px 34px -16px rgba(67,56,202,.8)}
.btn-primary:hover{transform:translateY(-1px)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{transform:translateY(-1px)}
.btn-ghost{color:#fff;border-color:rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.btn-dark{background:var(--ink);color:#fff}.btn-dark:hover{background:var(--brand)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;isolation:isolate;padding:84px 24px 0;color:#e7ecf5;
  background:
    radial-gradient(900px 520px at 82% -8%, rgba(123,63,242,.38), transparent 60%),
    radial-gradient(820px 480px at -6% 8%, rgba(67,56,202,.42), transparent 60%),
    radial-gradient(600px 400px at 50% 120%, rgba(18,184,134,.14), transparent 60%),
    linear-gradient(180deg,#0a0f1f 0%, #0b0f1a 100%)}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(rgba(255,255,255,.045) 1px,transparent 1px);background-size:3px 3px;mix-blend-mode:overlay;opacity:.4}
/* faint geometry grid lines */
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px;mask-image:radial-gradient(circle at 50% 0,#000,transparent 70%)}
.hero-inner{max-width:1160px;margin:0 auto;text-align:center;position:relative;z-index:1}
.hero .eyebrow{background:rgba(255,255,255,.08);color:#c7d2ec;border:1px solid rgba(255,255,255,.14);margin-bottom:22px}
.hero h1{color:#fff}
.hero h1 .grad{background:linear-gradient(90deg,#9aa6ff,#b98cff 55%,var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lede{max-width:680px;margin:20px auto 30px;font-size:clamp(1.05rem,1.4vw,1.2rem);color:#c5cfe2}
.cta-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.cta-note{margin-top:14px;font-size:.83rem;color:#8a97b4}
.hero-media{position:relative;max-width:1080px;margin:56px auto 0;border-radius:16px 16px 0 0;overflow:hidden;border:1px solid rgba(255,255,255,.12);border-bottom:none;box-shadow:var(--shadow-media)}
.hero-media img{width:100%;display:block}

/* ---------- Section rhythm ---------- */
section{padding:84px 0}
.section-head{max-width:680px;margin:0 auto 48px;text-align:center}
.section-head .eyebrow{color:var(--brand);background:rgba(67,56,202,.08);margin-bottom:14px}
.section-head p{font-size:1.08rem;color:var(--muted)}

/* ---------- Logos / trust strip ---------- */
.trust{padding:30px 0;border-bottom:1px solid var(--line);background:var(--paper-2)}
.trust .wrap{display:flex;align-items:center;justify-content:center;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:.84rem}
.trust .carrier{font-weight:600;color:#3a4252;font-family:'Space Grotesk',sans-serif}

/* ---------- Problem band ---------- */
.problem{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.problem-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:8px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}
.pcard .n{font-family:'Space Grotesk',sans-serif;font-size:1.8rem;font-weight:700;color:var(--brand)}
@media(max-width:820px){.problem-grid{grid-template-columns:1fr}}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{position:relative;padding:24px;border:1px solid var(--line);border-radius:14px;background:#fff}
.step .k{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-family:'Space Grotesk',sans-serif;font-weight:700;margin-bottom:12px}
@media(max-width:820px){.steps{grid-template-columns:1fr}}

/* ---------- Feature rows ---------- */
.feature{display:grid;grid-template-columns:1fr 1.1fr;gap:48px;align-items:center;margin:0 auto;max-width:var(--maxw)}
.feature + .feature{margin-top:84px}
.feature.flip .feature-text{order:2}
.feature .tag{display:inline-block;font-size:.8rem;font-weight:600;letter-spacing:.03em;text-transform:uppercase;color:var(--accent);margin-bottom:8px}
.feature ul{margin:14px 0 0;padding:0;list-style:none}
.feature li{padding:6px 0 6px 26px;position:relative;color:#28313f}
.feature li::before{content:"";position:absolute;left:0;top:11px;width:12px;height:7px;border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(-45deg)}
.shot{border-radius:14px;overflow:hidden;border:1px solid var(--line);box-shadow:0 24px 50px -28px rgba(11,15,26,.4)}
.shot img{width:100%}
@media(max-width:880px){.feature{grid-template-columns:1fr;gap:24px}.feature.flip .feature-text{order:0}}

/* ---------- Modes ---------- */
.modes{background:var(--ink);color:#dfe6f3;position:relative;overflow:hidden}
.modes::before{content:"";position:absolute;inset:0;background:radial-gradient(700px 400px at 85% 0,rgba(123,63,242,.28),transparent 60%),radial-gradient(700px 400px at 0 100%,rgba(67,56,202,.3),transparent 60%)}
.modes .section-head h2{color:#fff}.modes .section-head p{color:#aeb9d4}
.modes .section-head .eyebrow{background:rgba(255,255,255,.08);color:#c7d2ec}
.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;position:relative;z-index:1}
.mode{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.12);border-radius:16px;padding:28px}
.mode h3{color:#fff;font-size:1.3rem}
.mode .role{font-size:.8rem;letter-spacing:.04em;text-transform:uppercase;color:var(--accent);font-weight:600}
.mode p{color:#b8c2da}
@media(max-width:820px){.mode-grid{grid-template-columns:1fr}}

/* ---------- Principles ---------- */
.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.pri{padding:26px;border:1px solid var(--line);border-radius:14px;background:#fff;transition:transform .15s ease,box-shadow .15s ease}
.pri:hover{transform:translateY(-2px);box-shadow:0 18px 38px -24px rgba(11,15,26,.35)}
.pri-ic{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-2));margin-bottom:14px;box-shadow:0 8px 18px -8px rgba(67,56,202,.7)}
.pri-ic svg{width:22px;height:22px}
.pri h3{font-size:1.12rem}
.pri p{margin:0}
@media(max-width:820px){.pgrid{grid-template-columns:1fr}}

/* ---------- Pricing ---------- */
.pricing{background:var(--paper-2);border-top:1px solid var(--line)}
.price-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:16px;align-items:stretch}
.plan{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px 20px;display:flex;flex-direction:column}
.plan.featured{border-color:var(--brand);box-shadow:0 24px 50px -28px rgba(67,56,202,.5);position:relative}
.plan.featured .ribbon{position:absolute;top:-12px;left:20px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-size:.72rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;padding:4px 12px;border-radius:999px}
.plan h3{font-size:1.08rem}
.plan .price{font-family:'Space Grotesk',sans-serif;font-size:1.75rem;font-weight:700;margin:4px 0 0}
.plan .price small{font-size:.85rem;font-weight:500;color:var(--muted)}
.plan .annual{font-size:.8rem;color:var(--muted);margin:0 0 4px}
.plan ul{list-style:none;padding:0;margin:14px 0 18px;flex:1}
.plan li{padding:6px 0 6px 22px;position:relative;font-size:.88rem;color:#333d4d}
.plan li::before{content:"";position:absolute;left:0;top:10px;width:11px;height:6px;border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(-45deg)}
.plan .over{margin:0 0 16px;font-size:.82rem;color:var(--muted);border-top:1px dashed var(--line);padding-top:11px}
.plan .over b{color:#333d4d;font-weight:700}
.plan .btn{justify-content:center}
@media(max-width:880px){.price-grid{grid-template-columns:1fr}}

/* ---------- CTA band ---------- */
.cta-band{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;text-align:center}
.cta-band h2{color:#fff}
.cta-band p{color:rgba(255,255,255,.86)}
.email-form{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:8px}
.email-form input{padding:13px 16px;border-radius:999px;border:1px solid rgba(255,255,255,.4);background:rgba(255,255,255,.12);color:#fff;min-width:280px;font-size:.95rem}
.email-form input::placeholder{color:rgba(255,255,255,.7)}

/* ---------- Footer ---------- */
footer{background:var(--ink);color:#9aa6bd;padding:48px 0 36px;font-size:.9rem}
.foot-inner{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap}
footer .brand{color:#fff;font-size:1.2rem;margin-bottom:8px}
footer a{color:#aeb9d4}footer a:hover{color:#fff}
.foot-cols{display:flex;gap:56px;flex-wrap:wrap}
.foot-col h4{font-family:'Space Grotesk',sans-serif;color:#cdd6ea;font-size:.82rem;letter-spacing:.04em;text-transform:uppercase;margin:0 0 12px}
.foot-col a{display:block;margin-bottom:8px}
.foot-bottom{margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:#6e7a93;font-size:.82rem}