:root{color-scheme:dark;--bg:#061018;--panel:#0a1721;--text:#f4fbff;--muted:#91a6b3;--line:rgba(255,255,255,.09);--cyan:#55e7ef;--blue:#6ba8ff}*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:radial-gradient(circle at 82% 7%,rgba(85,231,239,.10),transparent 31%),radial-gradient(circle at 10% 42%,rgba(107,168,255,.08),transparent 28%),var(--bg);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI",Tahoma,Arial,sans-serif}.r4-start-page{padding:22px}.r4-shell{width:min(1080px,100%);margin:0 auto}.r4-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:8px 0 30px}.r4-brand{display:flex;align-items:center;gap:11px}.r4-mark{display:grid;place-items:center;width:45px;height:45px;border-radius:14px;background:linear-gradient(135deg,var(--cyan),var(--blue));color:#041016;font-size:24px;font-weight:1000}.r4-brand strong,.r4-brand span{display:block}.r4-brand strong{font-size:18px}.r4-brand span{margin-top:2px;color:var(--muted);font-size:10px;letter-spacing:.14em}.r4-release{padding:7px 11px;border:1px solid rgba(85,231,239,.2);border-radius:999px;color:var(--cyan);background:rgba(85,231,239,.055);font-size:11px;font-weight:900}.r4-hero{max-width:780px;padding:30px 0 26px}.r4-kicker{color:var(--cyan);font-size:12px;font-weight:900}.r4-hero h1{font-size:clamp(34px,6vw,68px);line-height:1.05;margin:10px 0 14px;letter-spacing:-.035em}.r4-hero p{max-width:720px;margin:0;color:var(--muted);font-size:17px;line-height:1.8}.r4-choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:22px 0}.r4-choice{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:16px;padding:22px;border:1px solid var(--line);border-radius:22px;background:rgba(255,255,255,.025);color:inherit;text-decoration:none;transition:border-color .18s ease,background .18s ease,transform .18s ease}.r4-choice.primary{border-color:rgba(85,231,239,.25);background:linear-gradient(135deg,rgba(85,231,239,.075),rgba(107,168,255,.04))}.r4-choice:hover,.r4-choice:focus-visible{outline:none;border-color:rgba(85,231,239,.52);background:rgba(85,231,239,.07);transform:translateY(-1px)}.r4-choice-icon{display:grid;place-items:center;width:58px;height:58px;border-radius:18px;background:rgba(85,231,239,.08);border:1px solid rgba(85,231,239,.16);color:var(--cyan);font-size:25px}.r4-choice small,.r4-choice strong,.r4-choice p{display:block}.r4-choice small{color:var(--cyan);font-size:10px;font-weight:900}.r4-choice strong{margin-top:3px;font-size:21px}.r4-choice p{margin:6px 0 0;color:var(--muted);font-size:12px;line-height:1.6}.r4-choice>b{color:var(--cyan);font-size:22px}.r4-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:30px 0}.r4-steps>div{padding:18px;border-top:1px solid var(--line)}.r4-steps span{display:grid;place-items:center;width:31px;height:31px;margin-bottom:12px;border-radius:10px;background:rgba(85,231,239,.08);color:var(--cyan);font-size:12px;font-weight:1000}.r4-steps strong{display:block;font-size:15px}.r4-steps p{margin:5px 0 0;color:var(--muted);font-size:12px;line-height:1.6}.r4-trust{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;padding:15px;border:1px solid var(--line);border-radius:20px;background:rgba(255,255,255,.02)}.r4-trust>div{padding:10px 12px}.r4-trust b,.r4-trust span{display:block}.r4-trust b{font-size:13px}.r4-trust span{margin-top:5px;color:var(--muted);font-size:11px;line-height:1.6}.r4-footer{display:flex;justify-content:center;gap:9px;flex-wrap:wrap;padding:28px 0 10px;color:var(--muted);font-size:11px}.r4-footer a{color:var(--cyan);text-decoration:none}@media(max-width:760px){.r4-start-page{padding:16px}.r4-head{padding-bottom:18px}.r4-hero{padding-top:18px}.r4-choice-grid,.r4-steps,.r4-trust{grid-template-columns:1fr}.r4-choice{padding:18px}.r4-choice-icon{width:50px;height:50px}.r4-trust{gap:0}}
/* Tayyar Screen R5 — launch page polish */
.tayyar-main-logo{width:60px;height:60px;object-fit:contain;display:block;filter:drop-shadow(0 9px 24px rgba(85,231,239,.17))}
.r4-brand.tayyar-brand{gap:13px}
.r4-release{white-space:nowrap}
.r4-choice{min-height:124px}
.r4-choice:active{transform:translateY(0)}
.r4-choice,.r4-footer a{touch-action:manipulation}
.r4-choice:focus-visible,.r4-footer a:focus-visible{outline:3px solid rgba(85,231,239,.42);outline-offset:3px}
@media(max-width:760px){.tayyar-main-logo{width:50px;height:50px}.r4-head{align-items:flex-start}.r4-release{font-size:10px}.r4-choice{min-height:unset}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}

/* R5.2 — Mobile launch page */
html,body{max-width:100%;overflow-x:hidden}
@media(max-width:560px){
  .r4-shell{padding:16px 12px}
  .r4-head{gap:10px;flex-wrap:wrap}
  .r4-hero h1{font-size:clamp(36px,12vw,58px);line-height:1.06}
  .r4-hero p{font-size:15px;line-height:1.85}
  .r4-choices{grid-template-columns:1fr!important}
  .r4-choice{padding:18px;min-width:0}
  .r4-steps{grid-template-columns:1fr!important}
  .r4-safety{grid-template-columns:1fr!important}
  .r4-footer{flex-wrap:wrap;justify-content:center;text-align:center}
}
@media(max-width:360px){
  .r4-shell{padding:12px 8px}
  .r4-hero h1{font-size:36px}
}

/* R5.3 — Final public UX closeout */
@media(min-width:1400px){.r4-shell{max-width:1120px}.r4-choice{min-height:132px}}