/* MorseBlink landing — palette derived from app icon:
   signal green #2fe08d on near-black lamp housing #0b0f0d */
:root{
  --bg:#0b0f0d;
  --bg-alt:#101612;
  --surface:#151d18;
  --surface-2:#1b2620;
  --ink:#e8f5ee;
  --ink-soft:#a7bfb2;
  --brand:#2fe08d;
  --brand-strong:#59f0a8;
  --brand-dim:rgba(47,224,141,.14);
  --line:rgba(167,191,178,.18);
  --glow:0 0 24px rgba(47,224,141,.35);
  --radius:14px;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme: light){
  :root{
    --bg:#f6faf8;
    --bg-alt:#ecf4ef;
    --surface:#ffffff;
    --surface-2:#f0f7f2;
    --ink:#122019;
    --ink-soft:#43584d;
    --brand:#0c8a54;
    --brand-strong:#0a7346;
    --brand-dim:rgba(12,138,84,.10);
    --line:rgba(18,32,25,.14);
    --glow:0 6px 18px rgba(12,138,84,.18);
  }
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-underline-offset:3px}
a:hover{color:var(--brand-strong)}
:focus-visible{outline:3px solid var(--brand);outline-offset:3px;border-radius:4px}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.wrap-narrow{max-width:760px}
.center{text-align:center}

.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link{
  position:absolute;left:-999px;top:0;background:var(--brand);color:#06130c;
  padding:.6rem 1rem;z-index:100;border-radius:0 0 8px 0;font-weight:700;text-decoration:none;
}
.skip-link:focus{left:0}

/* header */
.site-header{
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{max-width:1080px;margin:0 auto;padding:.65rem 20px;display:flex;align-items:center;gap:1rem;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:800;font-size:1.1rem;color:var(--ink);text-decoration:none;letter-spacing:.02em}
.brand img{border-radius:9px}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:8px;padding:.55rem .7rem;cursor:pointer}
.nav-toggle-bar,.nav-toggle-bar::before,.nav-toggle-bar::after{
  display:block;content:"";width:20px;height:2px;background:var(--ink);border-radius:2px;position:relative;transition:transform .2s;
}
.nav-toggle-bar::before{position:absolute;top:-6px}
.nav-toggle-bar::after{position:absolute;top:6px}
.nav-links{display:flex;align-items:center;gap:1.2rem;list-style:none;margin-left:auto}
.nav-links a{color:var(--ink-soft);text-decoration:none;font-weight:600;font-size:.95rem}
.nav-links a:hover{color:var(--brand)}
.nav-cta{
  background:var(--brand);color:#06130c!important;padding:.45rem .95rem;border-radius:999px;
}
.nav-cta:hover{background:var(--brand-strong)}
@media (max-width:820px){
  .nav-toggle{display:block}
  .nav-links{display:none;width:100%;flex-direction:column;align-items:flex-start;gap:.4rem;padding:.6rem 0}
  .nav-links.open{display:flex}
  .nav-links a{display:block;padding:.5rem .2rem;font-size:1.05rem}
}

/* hero */
.hero{padding:4.5rem 0 3.5rem;background:
  radial-gradient(60rem 30rem at 80% -10%,var(--brand-dim),transparent 60%),var(--bg)}
.hero-grid{display:grid;grid-template-columns:1.25fr .9fr;gap:3rem;align-items:center}
.kicker{
  font-family:var(--mono);font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand);font-weight:700;margin-bottom:.9rem;
}
.morse-dots{letter-spacing:.2em}
h1{font-size:clamp(1.9rem,4.2vw,3rem);line-height:1.15;letter-spacing:-.015em;margin-bottom:1.1rem;font-weight:800}
.lede{font-size:1.13rem;color:var(--ink-soft);max-width:36em;margin-bottom:1.6rem}
.cta-row{display:flex;align-items:center;gap:1.2rem;flex-wrap:wrap;margin-bottom:1.4rem}
.appstore-btn{
  display:inline-flex;align-items:center;gap:.7rem;
  background:var(--brand);color:#06130c;text-decoration:none;
  padding:.7rem 1.35rem;border-radius:12px;font-weight:600;
  box-shadow:var(--glow);transition:transform .15s,background .15s;
}
.appstore-btn:hover{background:var(--brand-strong);color:#06130c;transform:translateY(-2px)}
.appstore-btn-text{display:flex;flex-direction:column;line-height:1.15;text-align:left}
.appstore-btn-text small{font-size:.72rem;font-weight:600;opacity:.85}
.appstore-btn-text strong{font-size:1.15rem;font-weight:800;letter-spacing:.01em}
.price-note{color:var(--ink-soft);font-size:.95rem}
.price-note strong{color:var(--ink)}
.hero-proof{list-style:none;display:flex;flex-wrap:wrap;gap:.5rem}
.hero-proof li{
  font-family:var(--mono);font-size:.78rem;color:var(--brand);
  border:1px solid var(--line);border-radius:999px;padding:.3rem .75rem;background:var(--brand-dim);
}

/* signal card (text mock — app has no public screenshots) */
.hero-visual{display:flex;justify-content:center}
.signal-card{
  width:min(320px,100%);background:var(--surface);border:1px solid var(--line);
  border-radius:24px;padding:2rem 1.6rem;text-align:center;
  box-shadow:0 24px 60px rgba(0,0,0,.35),inset 0 1px 0 rgba(255,255,255,.04);
}
.signal-icon{margin:0 auto 1.2rem;border-radius:22px;box-shadow:var(--glow)}
.signal-label{font-family:var(--mono);font-size:.72rem;letter-spacing:.22em;color:var(--ink-soft);margin-bottom:1.1rem}
.signal-code{display:flex;justify-content:center;align-items:center;gap:6px;margin-bottom:.9rem;min-height:14px}
.signal-code .dit,.signal-code .dah{
  height:10px;border-radius:6px;background:var(--brand);box-shadow:0 0 10px rgba(47,224,141,.6);
  animation:pulse 2.4s infinite;
}
.signal-code .dit{width:10px}
.signal-code .dah{width:30px}
.signal-code .gap{width:8px}
.signal-code span:nth-child(1){animation-delay:0s}.signal-code span:nth-child(2){animation-delay:.15s}
.signal-code span:nth-child(3){animation-delay:.3s}.signal-code span:nth-child(5){animation-delay:.6s}
.signal-code span:nth-child(6){animation-delay:.85s}.signal-code span:nth-child(7){animation-delay:1.1s}
.signal-code span:nth-child(9){animation-delay:1.5s}.signal-code span:nth-child(10){animation-delay:1.65s}
.signal-code span:nth-child(11){animation-delay:1.8s}
@keyframes pulse{0%,100%{opacity:.35}12%{opacity:1}24%{opacity:.35}}
.signal-text{font-family:var(--mono);font-size:1.35rem;color:var(--brand);letter-spacing:.1em;margin-bottom:1.2rem}
.signal-modes{display:flex;justify-content:center;gap:.5rem}
.signal-modes span{
  font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;color:var(--ink-soft);
  border:1px solid var(--line);border-radius:6px;padding:.28rem .55rem;
}

/* sections */
.section{padding:4rem 0}
.section-alt{background:var(--bg-alt)}
.section h2{font-size:clamp(1.5rem,3vw,2.15rem);letter-spacing:-.01em;margin-bottom:1.4rem;font-weight:800}
.section-lede{color:var(--ink-soft);margin:-.6rem 0 1.6rem;max-width:44em}
.split{display:grid;grid-template-columns:1fr 1fr;gap:2rem;align-items:center}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem}
.panel h3{margin-bottom:.6rem;font-size:1.1rem}
.panel-problem h3{color:var(--ink-soft)}
.panel-solution{border-color:var(--brand);box-shadow:var(--glow)}
.panel-solution h3{color:var(--brand)}
.panel p{color:var(--ink-soft)}

.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.4rem}
.feature{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem;transition:border-color .2s}
.feature:hover{border-color:var(--brand)}
.feature-morse{font-family:var(--mono);color:var(--brand);font-size:1.1rem;letter-spacing:.15em;margin-bottom:.5rem}
.feature h3{margin-bottom:.55rem;font-size:1.15rem}
.feature p{color:var(--ink-soft);font-size:.98rem}

/* SOS demo */
.sos-demo{text-align:center}
.sos-ring{
  width:190px;height:190px;margin:0 auto 1rem;border-radius:50%;
  border:2px dashed var(--brand);display:flex;align-items:center;justify-content:center;
  animation:ringPulse 2.4s infinite;
}
@keyframes ringPulse{0%,100%{box-shadow:0 0 0 0 rgba(47,224,141,.35)}50%{box-shadow:0 0 0 18px rgba(47,224,141,0)}}
.sos-btn{
  width:130px;height:130px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--brand);color:#06130c;font-weight:900;font-size:1.7rem;letter-spacing:.08em;box-shadow:var(--glow);
}
.sos-caption{font-family:var(--mono);font-size:.8rem;color:var(--ink-soft);letter-spacing:.06em}

/* audiences + steps */
.audience-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem;margin-bottom:2.4rem}
.audience{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem}
.audience h3{font-size:1.05rem;margin-bottom:.5rem;color:var(--brand)}
.audience p{color:var(--ink-soft);font-size:.96rem}
.learn-steps{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius);padding:1.8rem}
.learn-steps h3{margin-bottom:1rem}
.learn-steps ol{padding-left:1.3rem;display:grid;gap:.7rem;color:var(--ink-soft)}
.learn-steps strong{color:var(--ink)}

/* FAQ */
.faq-list{display:grid;gap:.8rem}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:0;overflow:hidden;
}
.faq-item[open]{border-color:var(--brand)}
.faq-item summary{
  cursor:pointer;font-weight:700;padding:1rem 2.6rem 1rem 1.2rem;list-style:none;position:relative;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";position:absolute;right:1.1rem;top:50%;transform:translateY(-50%);
  color:var(--brand);font-size:1.4rem;font-weight:600;transition:transform .2s;
}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq-item p{padding:0 1.2rem 1.1rem;color:var(--ink-soft)}

/* guide cards */
.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.4rem}
.guide-card{
  display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:1.5rem;text-decoration:none;transition:border-color .2s,transform .15s;
}
.guide-card:hover{border-color:var(--brand);transform:translateY(-2px)}
.guide-card h3{color:var(--ink);font-size:1.08rem;margin-bottom:.45rem}
.guide-card p{color:var(--ink-soft);font-size:.95rem}

/* final cta */
.final-cta{background:
  radial-gradient(45rem 22rem at 50% 120%,var(--brand-dim),transparent 65%),var(--bg-alt)}
.final-cta p{color:var(--ink-soft);margin-bottom:1.6rem}
.final-cta .appstore-btn{margin:0 auto}

/* footer */
.site-footer{border-top:1px solid var(--line);padding:3rem 0 1.5rem;background:var(--bg)}
.footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:2rem;margin-bottom:2rem}
.brand-footer{display:flex;align-items:center;gap:.55rem;font-weight:800;margin-bottom:.7rem}
.brand-footer img{border-radius:7px}
.footer-note{color:var(--ink-soft);font-size:.92rem;margin-bottom:.7rem;max-width:34em}
.privacy-note strong{color:var(--brand)}
.site-footer h3{font-size:.85rem;text-transform:uppercase;letter-spacing:.1em;color:var(--ink-soft);margin-bottom:.7rem}
.site-footer ul{list-style:none;display:grid;gap:.45rem}
.site-footer li a{color:var(--ink-soft);text-decoration:none;font-size:.95rem}
.site-footer li a:hover{color:var(--brand)}
.footer-bottom{border-top:1px solid var(--line);padding-top:1.3rem}
.footer-bottom p{color:var(--ink-soft);font-size:.85rem}

/* guide pages */
.breadcrumb{font-size:.88rem;color:var(--ink-soft);margin:1.8rem 0 .4rem}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:.4rem}
.breadcrumb li+li::before{content:"›";margin-right:.4rem;color:var(--ink-soft)}
.article{padding:1rem 0 3.5rem}
.article header h1{font-size:clamp(1.7rem,3.6vw,2.5rem);margin-bottom:.8rem}
.article .article-meta{font-family:var(--mono);font-size:.8rem;color:var(--brand);letter-spacing:.08em;text-transform:uppercase;margin-bottom:2rem}
.article h2{font-size:1.45rem;margin:2.2rem 0 .8rem;letter-spacing:-.01em}
.article h3{font-size:1.12rem;margin:1.6rem 0 .6rem}
.article p{margin-bottom:1rem;color:var(--ink-soft);max-width:44em}
.article ul,.article ol{margin:0 0 1rem 1.3rem;color:var(--ink-soft);max-width:42em;display:grid;gap:.4rem}
.article strong{color:var(--ink)}
.article code,.morse-inline{font-family:var(--mono);color:var(--brand);background:var(--brand-dim);padding:.08em .35em;border-radius:5px;font-size:.95em}
.article table{border-collapse:collapse;margin:1.2rem 0;width:100%;max-width:44em;font-size:.95rem}
.article th,.article td{border:1px solid var(--line);padding:.5rem .8rem;text-align:left}
.article th{background:var(--surface-2);color:var(--ink)}
.article td{color:var(--ink-soft)}
.article td code{white-space:nowrap}
.callout{
  background:var(--surface);border:1px solid var(--brand);border-radius:var(--radius);
  padding:1.4rem 1.5rem;margin:2rem 0;box-shadow:var(--glow);
}
.callout h2,.callout h3{margin-top:0;color:var(--brand)}
.callout p:last-child{margin-bottom:0}
.related{border-top:1px solid var(--line);margin-top:2.5rem;padding-top:1.5rem}
.related h2{margin-top:0;font-size:1.2rem}
.related ul{list-style:none;margin-left:0}

@media (max-width:880px){
  .hero{padding:3rem 0 2.5rem}
  .hero-grid,.split{grid-template-columns:1fr;gap:2rem}
  .feature-grid,.guide-grid{grid-template-columns:1fr}
  .audience-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:1.6rem}
  .section{padding:3rem 0}
}