:root{
  --bg:#0f1115; --panel:#161a22; --card:#1b212c; --line:#283143;
  --ink:#eef2f8; --muted:#9aa6b8; --brand:#3ddc97; --brand-2:#2bb37a;
  --accent:#ffd166; --danger:#ff6b6b; --radius:14px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.55;-webkit-font-smoothing:antialiased}
.wrap{max-width:1080px;margin:0 auto;padding:0 22px}
a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.15;margin:0 0 .4em}
.hl{color:var(--brand)}
.muted{color:var(--muted)}

/* nav */
.nav{position:sticky;top:0;z-index:20;background:rgba(15,17,21,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:62px}
.brand{font-weight:800;font-size:1.3rem;letter-spacing:-.02em}
.brand span{color:var(--brand)}
.nav-links{display:flex;align-items:center;gap:22px;font-size:.95rem}
.nav-links a{color:var(--muted)}
.nav-links a:hover{color:var(--ink)}

/* buttons */
.btn{display:inline-block;background:var(--brand);color:#05231a;font-weight:700;padding:12px 20px;border-radius:11px;border:0;cursor:pointer;transition:transform .06s ease,filter .15s ease;font-size:1rem}
.btn:hover{filter:brightness(1.07)}
.btn:active{transform:translateY(1px)}
.btn-sm{padding:8px 14px;font-size:.9rem;color:#05231a}
.btn-lg{padding:15px 26px;font-size:1.05rem}
.full{width:100%}
.nav-links .btn-sm{color:#05231a}

/* hero */
.hero{padding:74px 0 60px;border-bottom:1px solid var(--line);background:radial-gradient(1200px 500px at 80% -10%,rgba(61,220,151,.13),transparent)}
.hero-inner{display:grid;grid-template-columns:1.25fr .9fr;gap:48px;align-items:center}
.eyebrow{color:var(--brand);font-weight:700;letter-spacing:.06em;text-transform:uppercase;font-size:.78rem;margin:0 0 14px}
.hero h1{font-size:3rem;letter-spacing:-.03em}
.sub{color:var(--muted);font-size:1.15rem;max-width:38ch;margin:18px 0 26px}
.hero-cta{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.cta-note{color:var(--muted);font-size:.9rem}
.trust{list-style:none;display:flex;gap:20px;padding:0;margin:26px 0 0;color:var(--muted);font-size:.9rem;flex-wrap:wrap}
.trust li{white-space:nowrap}

/* hero card */
.hero-card{display:flex;justify-content:center}
.paper{position:relative;width:280px;height:340px;background:#f7f8fb;border-radius:10px;padding:28px 24px;box-shadow:0 30px 60px rgba(0,0,0,.45);transform:rotate(3deg)}
.paper-row{height:11px;background:#d9dee8;border-radius:4px;margin:14px 0}
.paper-row.head{height:18px;width:55%;background:#aeb7c7}
.paper-row.short{width:62%}
.stamp{position:absolute;bottom:34px;right:18px;transform:rotate(-12deg);border:3px solid var(--danger);color:var(--danger);font-weight:800;font-size:.85rem;padding:6px 10px;border-radius:6px;letter-spacing:.05em;opacity:.9}

/* sections */
section{padding:64px 0}
.how h2,.faq h2,.app h2{font-size:1.9rem;letter-spacing:-.02em}
.how h2{text-align:center;margin-bottom:40px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.step .num{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--brand);color:#05231a;font-weight:800;margin-bottom:12px}
.step h3{font-size:1.1rem}
.step p{color:var(--muted);margin:0}

/* pricing (landing) */
.pricing{text-align:center}
.pricing h2{font-size:1.9rem;letter-spacing:-.02em}
.pricing-sub{color:var(--muted);max-width:52ch;margin:10px auto 38px}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;text-align:left}
.price-card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column}
.price-card.featured{border-color:var(--brand);box-shadow:0 0 0 3px rgba(61,220,151,.12)}
.price-card .tag{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--brand);color:#05231a;font-weight:700;font-size:.72rem;padding:4px 12px;border-radius:999px;white-space:nowrap}
.price-card h3{font-size:1.15rem;margin-bottom:4px}
.price-card .price{font-size:2.2rem;font-weight:800;letter-spacing:-.03em;margin:6px 0}
.price-blurb{color:var(--muted);font-size:.9rem;margin:0 0 16px}
.price-card ul{list-style:none;padding:0;margin:0 0 22px;flex:1}
.price-card li{position:relative;padding-left:24px;margin:9px 0;color:#cdd6e3;font-size:.9rem}
.price-card li::before{content:'✓';position:absolute;left:0;color:var(--brand);font-weight:800}

/* tier cards (in-app paywall) */
.tier-cards{display:grid;grid-template-columns:1fr;gap:12px;margin:16px 0 6px;text-align:left}
.tier-card{position:relative;border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:#0e1218}
.tier-card.popular{border-color:var(--brand);background:rgba(61,220,151,.06)}
.tier-card .tag{position:absolute;top:-10px;right:14px;background:var(--brand);color:#05231a;font-weight:700;font-size:.68rem;padding:3px 10px;border-radius:999px}
.tier-top{display:flex;align-items:baseline;justify-content:space-between;gap:10px}
.tier-name{font-weight:700;font-size:1.02rem}
.tier-price{font-weight:800;font-size:1.3rem;letter-spacing:-.02em}
.tier-blurb{color:var(--muted);font-size:.85rem;margin:2px 0 10px}
.tier-feats{list-style:none;padding:0;margin:0 0 14px}
.tier-feats li{position:relative;padding-left:20px;margin:6px 0;color:#cdd6e3;font-size:.85rem}
.tier-feats li::before{content:'✓';position:absolute;left:0;color:var(--brand);font-weight:800}
.tier-btn{font-size:.95rem;padding:11px 18px}

/* app */
.app{background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.app-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.form h2{font-size:1.4rem;margin-bottom:18px}
.form label{display:block;font-size:.85rem;color:var(--muted);margin-bottom:14px;font-weight:600}
.form input{display:block;width:100%;margin-top:6px;background:#0e1218;border:1px solid var(--line);color:var(--ink);border-radius:10px;padding:11px 12px;font-size:.98rem;font-family:inherit}
.form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(61,220,151,.15)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
fieldset{border:0;padding:0;margin:0 0 18px}
legend{font-size:.85rem;color:var(--muted);font-weight:600;margin-bottom:10px}
.tiers{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.tier{margin:0 !important;cursor:pointer}
.tier input{position:absolute;opacity:0;pointer-events:none}
.tier span{display:block;border:1px solid var(--line);border-radius:10px;padding:11px 13px;transition:.12s}
.tier strong{display:block;font-size:.95rem;color:var(--ink)}
.tier small{color:var(--muted);font-size:.8rem}
.tier.selected span,.tier input:checked+span{border-color:var(--brand);background:rgba(61,220,151,.08)}
.disclaimer-sm{font-size:.78rem;color:var(--muted);text-align:center;margin:14px 0 0}

/* preview */
.preview{position:sticky;top:80px;min-height:420px}
.preview-empty{display:grid;place-content:center;text-align:center;height:380px;color:var(--muted)}
.preview-empty .ghost{font-size:3rem;margin-bottom:10px}
.preview-empty p{margin:.3em 0}
.result-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.badge{background:rgba(255,209,102,.16);color:var(--accent);border:1px solid rgba(255,209,102,.4);padding:5px 11px;border-radius:999px;font-size:.8rem;font-weight:700}
.link{background:none;border:0;color:var(--brand);cursor:pointer;font-size:.9rem;font-family:inherit;padding:0}
.link:hover{text-decoration:underline}
.letter{white-space:pre-wrap;font-family:ui-monospace,"SF Mono",Menlo,monospace;font-size:.86rem;line-height:1.6;background:#0e1218;border:1px solid var(--line);border-radius:10px;padding:20px;max-height:340px;overflow:auto;color:#dfe6f0}
.next{margin-top:18px}
.next h4{font-size:.95rem;margin:0 0 8px}
.next ul{margin:0;padding-left:18px;color:var(--muted);font-size:.88rem}
.next li{margin:6px 0}
.disclaimer{font-size:.76rem;color:var(--muted);border-top:1px solid var(--line);padding-top:14px;margin-top:18px}
.paywall{margin-top:18px;border:1px dashed var(--brand);border-radius:12px;background:rgba(61,220,151,.06);padding:20px;text-align:center}
.paywall h3{font-size:1.15rem}
.paywall p{color:var(--muted);font-size:.9rem;margin:.4em 0 14px}
.guarantee{font-size:.8rem;margin-top:12px}

/* faq */
.faq h2{text-align:center;margin-bottom:30px}
details{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-bottom:12px}
summary{cursor:pointer;font-weight:600}
details p{color:var(--muted);margin:12px 0 0}

/* foot */
.foot{padding:30px 0;border-top:1px solid var(--line)}
.foot-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px}
.foot .hl{color:var(--brand)}

/* blog: article */
.post{padding:48px 0 70px}
.post-wrap{max-width:760px}
.back{display:inline-block;margin-bottom:18px}
.post h1{font-size:2.3rem;letter-spacing:-.02em;margin-bottom:26px}
.post-section{margin:30px 0}
.post-section h2{font-size:1.4rem;letter-spacing:-.01em;margin-bottom:10px;color:var(--ink)}
.post-section p{color:#cdd6e3;margin:.7em 0}
.post-section ul,.post-section ol{color:#cdd6e3;padding-left:22px}
.post-section li{margin:8px 0}
.post-section h3{font-size:1.08rem;margin:18px 0 6px}
.post-section strong{color:var(--ink)}
.post-faq{margin:40px 0}
.post-faq h2{font-size:1.4rem;margin-bottom:16px}
.post-cta{margin:40px 0;background:rgba(61,220,151,.08);border:1px solid rgba(61,220,151,.35);border-radius:var(--radius);padding:28px;text-align:center}
.post-cta h3{font-size:1.3rem}
.post-cta p{color:var(--muted);max-width:48ch;margin:.5em auto 18px}
.related{margin:36px 0;border-top:1px solid var(--line);padding-top:24px}
.related h3{font-size:1.05rem;margin-bottom:10px}
.related ul{padding-left:18px;color:var(--brand)}
.related li{margin:7px 0}
.post-disclaimer{font-size:.78rem;color:var(--muted);border-top:1px solid var(--line);padding-top:18px;margin-top:30px}

/* blog: index */
.guides-hero{padding:60px 0 30px;border-bottom:1px solid var(--line);background:radial-gradient(900px 400px at 80% -20%,rgba(61,220,151,.12),transparent)}
.guides-hero h1{font-size:2.6rem;letter-spacing:-.03em}
.guides-hero .sub{max-width:54ch}
.guides{padding:46px 0}
.guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.guide-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:.14s}
.guide-card:hover{border-color:var(--brand);transform:translateY(-2px)}
.guide-card h2{font-size:1.2rem;letter-spacing:-.01em;margin-bottom:8px}
.guide-card p{color:var(--muted);font-size:.92rem;margin:0 0 14px}
.guide-card .read{color:var(--brand);font-weight:600;font-size:.9rem}
.guides-cta{padding:30px 0 70px;text-align:center}
.guides-cta h3{font-size:1.4rem;margin-bottom:16px}

@media (max-width:860px){
  .guide-grid{grid-template-columns:1fr}
  .post h1{font-size:1.9rem}
  .hero-inner,.app-grid{grid-template-columns:1fr}
  .hero-card{display:none}
  .hero h1{font-size:2.3rem}
  .steps{grid-template-columns:1fr}
  .price-grid{grid-template-columns:1fr}
  .grid2,.tiers{grid-template-columns:1fr}
  .preview{position:static}
}

/* ===== success / delivery page ===== */
.success{padding:48px 0 70px}
.success-wrap{max-width:760px}
.success-head{text-align:center;margin-bottom:34px}
.check{width:54px;height:54px;border-radius:50%;background:var(--brand);color:#05231a;font-size:1.6rem;font-weight:800;display:grid;place-items:center;margin:0 auto 16px}
.success-head h1{font-size:2rem;letter-spacing:-.02em}
.demo-banner{margin:16px auto 0;max-width:52ch;background:rgba(255,209,102,.12);border:1px solid rgba(255,209,102,.4);color:var(--accent);font-size:.85rem;padding:10px 14px;border-radius:10px}
.section-intro{color:#cdd6e3;margin:6px 0 4px}
.letter-card,.mail-card,.logo-card,.error-card{margin:18px 0}
.lc-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.lc-head .when{font-size:.82rem}
.paper-letter{background:#fff;color:#111;border-radius:8px;padding:34px 38px;box-shadow:0 8px 30px rgba(0,0,0,.35)}
.paper-letter pre{white-space:pre-wrap;font-family:Georgia,"Times New Roman",serif;font-size:.92rem;line-height:1.6;margin:0;color:#111}
.letter-logo{max-height:64px;max-width:240px;display:block;margin:0 0 18px;object-fit:contain}
.lc-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:16px}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand)}
.logo-card h3,.mail-guide h3{font-size:1.05rem;margin-bottom:6px}
.opt{color:var(--muted);font-weight:400;font-size:.85rem}
.logo-card input[type=file]{display:block;margin:10px 0;color:var(--muted);font-size:.85rem}
.return-form input,.mail-card input{display:block;width:100%;margin:8px 0;background:#0e1218;border:1px solid var(--line);color:var(--ink);border-radius:9px;padding:10px 12px;font-family:inherit}
.env-sheet{background:#fff;color:#111;border-radius:8px;padding:34px 38px;min-height:230px;position:relative;box-shadow:0 8px 30px rgba(0,0,0,.35)}
.env-block{font-family:Georgia,serif;font-size:.95rem;line-height:1.5;color:#111}
.env-block.from{position:absolute;top:30px;left:38px}
.env-block.to{position:absolute;top:120px;left:46%}
.env-label{display:block;font-size:.65rem;letter-spacing:.1em;color:#999;font-family:var(--font);margin-bottom:4px}
.mail-guide{margin-top:18px}
.mail-guide ol{padding-left:20px;color:#cdd6e3}
.mail-guide li{margin:8px 0}
.error-card h3{margin-bottom:8px}

/* ===== print: isolate the active letter / envelope ===== */
@page{size:Letter;margin:1in}
@media print{
  .no-print,header.nav,footer{display:none \!important}
  body{background:#fff}
  body.is-printing .printable{display:none \!important}
  body.is-printing .printable.printing{display:block \!important;margin:0;padding:0}
  body.is-printing .printable.printing .paper-letter,
  body.is-printing .printable.printing .env-sheet{box-shadow:none;border-radius:0;padding:0;min-height:0}
  body.is-printing .printable.printing .env-block.from{position:static;margin-bottom:60px}
  body.is-printing .printable.printing .env-block.to{position:static;margin-left:3.5in}
  .success{padding:0}
}