/* Kryptix — site design system (shared by index / account / success)
   Dark-first "neon emerald" look, matching the desktop app. Light theme via
   html[data-theme="light"] (toggle in the header). */
:root{
  --bg:#0a0a0b; --bg-2:#07070a; --bg-3:#17171a;
  --surface:rgba(255,255,255,.03); --surface-2:rgba(255,255,255,.05); --surface-3:rgba(255,255,255,.08);
  --card:#111113;
  --fg:#f2f2f3; --fg-2:#ffffff; --muted:#8a8a93; --dim:#5c5c66;
  --line:#1f1f23; --line-2:#2a2a30; --line-3:#3a3a42;
  --accent:#34e0b5; --accent-2:#1fcfa3; --accent-3:#5cf0c9; --accent-ink:#04110d;
  --accent-weak:rgba(52,224,181,.10); --accent-line:rgba(52,224,181,.40); --accent-glow:rgba(52,224,181,.28);
  --good:#34e0b5; --warn:#e0a458; --bad:#ff5b61;
  --radius:16px; --radius-sm:11px; --radius-lg:22px; --maxw:1140px;
  --sh-1:0 1px 2px rgba(0,0,0,.4); --sh-2:0 18px 50px -20px rgba(0,0,0,.7); --sh-3:0 40px 90px -30px rgba(0,0,0,.8);
  --font-display:"Bricolage Grotesque","Instrument Sans",system-ui,sans-serif;
  --font-body:"Instrument Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --ease:cubic-bezier(.2,.7,.2,1);
  color-scheme:dark;
}
:root[data-theme="light"]{
  --bg:#f6f6f7; --bg-2:#ffffff; --bg-3:#ececef;
  --surface:#ffffff; --surface-2:#f0f0f2; --surface-3:#e4e4e8; --card:#ffffff;
  --fg:#111114; --fg-2:#0b0b0e; --muted:#5f5f6b; --dim:#8a8a93;
  --line:#e2e2e6; --line-2:#d2d2d8; --line-3:#b9b9c2;
  --accent:#0d9c7c; --accent-2:#0b8a6e; --accent-3:#12b08c; --accent-ink:#ffffff;
  --accent-weak:rgba(13,156,124,.10); --accent-line:rgba(13,156,124,.40); --accent-glow:rgba(13,156,124,.22);
  --good:#0d9c7c; --warn:#b7791f; --bad:#d64045;
  --sh-1:0 1px 2px rgba(16,24,40,.06); --sh-2:0 18px 50px -24px rgba(16,24,40,.25); --sh-3:0 40px 90px -40px rgba(16,24,40,.3);
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font-body);line-height:1.6;
  -webkit-font-smoothing:antialiased;min-height:100vh;overflow-x:hidden}
.wrap{max-width:var(--maxw);margin-inline:auto;padding-left:20px;padding-right:20px}
h1,h2,h3,h4{font-family:var(--font-display);margin:0;line-height:1.08;text-wrap:balance;letter-spacing:-.03em;color:var(--fg-2);font-weight:600}
p{margin:0}
a{color:inherit}
img,svg{display:block;max-width:100%}
[hidden]{display:none!important}
.eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--accent);font-weight:600}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--accent);border-radius:2px;box-shadow:0 0 8px var(--accent-glow)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.grad{background:linear-gradient(95deg,var(--fg-2) 0%,var(--fg-2) 45%,var(--accent) 100%);-webkit-background-clip:text;
  background-clip:text;color:transparent}

/* header */
header.site{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--bg) 78%,transparent);
  backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:1rem;height:66px}
.brand{display:flex;align-items:center;gap:.6rem;font-family:var(--font-display);font-weight:700;font-size:1.18rem;
  letter-spacing:-.02em;text-decoration:none;color:var(--fg-2)}
.brand small{font-family:var(--font-mono);font-weight:500;font-size:.68rem;letter-spacing:.1em;color:var(--muted);
  text-transform:uppercase;margin-left:.1rem}
.mark{width:1.75rem;height:1.75rem;border-radius:8px;flex:none;display:inline-flex;align-items:center;justify-content:center;
  color:var(--accent-ink);font-family:var(--font-display);font-weight:700;font-size:1rem;background:var(--accent)}
.nav .links{display:flex;gap:.3rem;margin-left:auto;align-items:center;font-size:.92rem}
.nav .links a.nav-link{text-decoration:none;color:var(--muted);padding:.45rem .7rem;border-radius:9px;font-weight:500;transition:color .15s,background .15s}
.nav .links a.nav-link:hover{color:var(--fg-2);background:var(--surface-2)}
.nav-cta{font-weight:600;font-size:.88rem;background:var(--accent);color:var(--accent-ink);padding:.55rem 1rem;border-radius:10px;
  text-decoration:none;box-shadow:0 8px 24px -8px var(--accent-glow);transition:transform .15s var(--ease),box-shadow .15s}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 12px 28px -8px var(--accent-glow)}
.nav-ghost{font-weight:600;font-size:.88rem;border:1px solid var(--line-2);padding:.5rem .95rem;border-radius:10px;text-decoration:none;
  color:var(--fg);background:var(--surface);transition:border-color .15s,background .15s}
.nav-ghost:hover{border-color:var(--line-3);background:var(--surface-2)}
#themeBtn{background:var(--surface);border:1px solid var(--line-2);color:var(--muted);width:2.25rem;height:2.25rem;border-radius:10px;
  cursor:pointer;display:inline-flex;align-items:center;justify-content:center;margin:0 .35rem;transition:color .15s,border-color .15s}
#themeBtn:hover{color:var(--fg-2);border-color:var(--line-3)}
#themeBtn svg{width:16px;height:16px}
#themeBtn .sun{display:none}
:root[data-theme="light"] #themeBtn .sun{display:block}
:root[data-theme="light"] #themeBtn .moon{display:none}
@media(max-width:820px){.nav .links a.nav-link{display:none}}
.nav-cta,.nav-ghost{white-space:nowrap}
@media(max-width:480px){
  .nav{gap:.5rem;height:60px}.nav .links{gap:.3rem}
  .brand{font-size:1.02rem}.brand small{display:none}
  .nav-cta,.nav-ghost{padding:.45rem .7rem;font-size:.8rem}
  #themeBtn{width:2rem;height:2rem;margin:0 .15rem}
}

/* buttons */
.btn{font-weight:600;text-decoration:none;padding:.85rem 1.35rem;border-radius:12px;display:inline-flex;align-items:center;
  justify-content:center;gap:.55rem;font-size:.97rem;border:1px solid transparent;cursor:pointer;font-family:inherit;line-height:1.2;
  transition:transform .15s var(--ease),box-shadow .15s,background .15s,border-color .15s}
.btn svg{width:18px;height:18px;flex:none}
.btn-primary{background:var(--accent);color:var(--accent-ink)}
.btn-primary:hover{transform:scale(1.02);box-shadow:0 0 0 4px var(--accent-weak),0 12px 32px -12px var(--accent-glow)}
.btn-ghost{border-color:var(--line-2);color:var(--fg);background:var(--surface)}
.btn-ghost:hover{border-color:var(--line-3);background:var(--surface-2);transform:translateY(-1px)}
.btn-danger{border-color:var(--line-2);color:var(--bad);background:var(--surface)}
.btn-danger:hover{border-color:var(--bad)}
.btn[disabled]{opacity:.55;cursor:default;transform:none!important}
.btn-block{width:100%}
.btn-lg{padding:1rem 1.6rem;font-size:1.03rem;border-radius:14px}

/* sections / cards */
section{padding-block:clamp(3rem,6vw,5.5rem)}
.sec-head{max-width:46ch;margin-bottom:2.4rem}
.sec-head.center{margin-inline:auto;text-align:center}
.sec-head.center .eyebrow{justify-content:center}
.sec-head.center .eyebrow::before{display:none}
.sec-head h2{font-size:clamp(1.7rem,3.6vw,2.5rem);font-weight:700;margin-top:.7rem}
.sec-head p{color:var(--muted);margin-top:.8rem;font-size:1.02rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--sh-1)}
.glass{background:linear-gradient(180deg,var(--surface-2),var(--surface));border:1px solid var(--line);border-radius:var(--radius)}
.note{font-family:var(--font-mono);font-size:.8rem;color:var(--muted);line-height:1.6}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* forms */
.field{display:flex;flex-direction:column;gap:.4rem;margin-bottom:1rem}
.field label{font-size:.78rem;color:var(--muted);font-weight:600;letter-spacing:.04em;text-transform:uppercase}
.field input{font:inherit;font-size:1rem;padding:.85rem .95rem;border-radius:12px;border:1px solid var(--line-2);
  background:var(--surface);color:var(--fg);width:100%;transition:border-color .15s,box-shadow .15s,background .15s}
.field input::placeholder{color:var(--dim)}
.field input:hover{border-color:var(--line-3)}
.field input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-weak);background:var(--surface-2)}
.pw{position:relative}
.pw input{padding-right:3rem}
.pw .eye{position:absolute;right:.4rem;top:50%;transform:translateY(-50%);width:2.2rem;height:2.2rem;border:0;background:transparent;
  color:var(--dim);border-radius:9px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}
.pw .eye:hover,.pw .eye.on{color:var(--accent);background:var(--accent-weak)}
.pw .eye svg{width:18px;height:18px}
.code input{font-family:var(--font-mono);font-size:1.5rem;letter-spacing:.45em;text-align:center;font-weight:600}
.err{color:var(--bad);font-size:.88rem;min-height:1.2em;margin:.1rem 0 .7rem;display:flex;gap:.4rem;align-items:flex-start}
.err:empty{margin:0}
.hint{font-size:.85rem;color:var(--muted);line-height:1.55}
.pill{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;padding:.26rem .6rem;border-radius:999px;
  background:var(--surface-3);color:var(--fg);font-weight:600;display:inline-flex;align-items:center;gap:.35rem;border:1px solid var(--line)}
.pill.ok{background:var(--accent-weak);color:var(--accent);border-color:var(--accent-line)}
.pill.warn{background:rgba(240,180,60,.12);color:var(--warn);border-color:rgba(240,180,60,.35)}
.pill.bad{background:rgba(255,91,97,.12);color:var(--bad);border-color:rgba(255,91,97,.35)}
.pill.acc{background:var(--accent);color:var(--accent-ink);border-color:transparent}
.seg{display:flex;background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:4px;gap:4px}
.seg a,.seg button{flex:1;text-align:center;padding:.6rem;border-radius:9px;text-decoration:none;font-weight:600;font-size:.92rem;
  color:var(--muted);border:0;background:transparent;cursor:pointer;font-family:inherit;transition:background .15s,color .15s}
.seg .on{background:var(--accent);color:var(--accent-ink);box-shadow:0 6px 16px -8px var(--accent-glow)}
.spin{display:inline-block;width:1.1rem;height:1.1rem;border:2px solid var(--line-2);border-top-color:var(--accent);border-radius:50%;
  animation:spin 1s linear infinite;vertical-align:-3px}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.fade{animation:fadeUp .4s var(--ease) both}

/* footer */
footer.site{border-top:1px solid var(--line);margin-top:3rem;background:var(--bg-2)}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2rem;padding-block:2.6rem 2rem;color:var(--muted);font-size:.9rem}
.foot h4{font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;color:var(--fg);margin-bottom:.8rem;font-family:var(--font-mono);font-weight:600}
.foot a{color:var(--muted);text-decoration:none;display:block;margin-bottom:.45rem}
.foot a:hover{color:var(--fg-2)}
.foot .brand{margin-bottom:.7rem}
.foot-bottom{border-top:1px solid var(--line);padding-block:1.1rem;display:flex;flex-wrap:wrap;gap:.6rem 1.5rem;justify-content:space-between;
  color:var(--dim);font-size:.82rem;font-family:var(--font-mono)}
.mailcopy{font-family:var(--font-mono);background:var(--surface-2);border:1px solid var(--line);border-radius:7px;padding:.15rem .5rem;
  cursor:pointer;color:var(--fg);display:inline-block}
@media(max-width:720px){.foot{grid-template-columns:1fr 1fr}.foot > div:first-child{grid-column:1/-1}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.spin{animation:none}.fade{animation:none}}