@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Manrope:wght@700;800&display=swap');

:root {
  --primary:#ff6d00;
  --primary-dark:#d95d00;
  --secondary:#263238;
  --secondary-soft:#37474f;
  --background:#ffffff;
  --surface:#ffffff;
  --surface-variant:#f5f5f5;
  --text:#263238;
  --muted:#455a64;
  --line:#263238;
  --line-soft:#cfd8dc;
  --success:#00a94f;
  --warning:#ffab00;
  --danger:#d32f2f;
  --container:1140px;
  --border:3px solid var(--line);
  --border-strong:4px solid var(--line);
  --shadow:6px 6px 0 var(--line);
  --shadow-orange:6px 6px 0 var(--primary);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--background);color:var(--text);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55}
a{color:inherit}
p{margin:0}
h1,h2,h3,h4{margin:0;font-family:Manrope,Inter,sans-serif;color:var(--secondary);font-weight:800;letter-spacing:-.025em}
h1{font-size:clamp(36px,5vw,56px);line-height:1.05;text-transform:uppercase}
h2{font-size:clamp(28px,3.6vw,40px);line-height:1.12;text-transform:uppercase}
h3{font-size:22px;line-height:1.25;text-transform:uppercase}
h4{font-size:16px;line-height:1.3;text-transform:uppercase}
img{max-width:100%}
::selection{background:var(--primary);color:#fff}
:focus-visible{outline:3px solid var(--primary);outline-offset:3px}
.muted{color:var(--muted)}

.site-header{position:sticky;top:0;z-index:30;background:#fff;border-bottom:var(--border-strong)}
.topbar{max-width:var(--container);min-height:72px;margin:0 auto;padding:8px 24px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:inline-flex;align-items:center;min-width:180px;text-decoration:none;color:var(--secondary);font-family:Manrope,sans-serif;font-weight:800;text-transform:uppercase;letter-spacing:-.04em}
.brand-logo{display:none}
.brand::after{content:"Письмо";font-size:20px}
.brand::before{content:"лёт";font-size:20px;color:var(--primary);order:2}
.nav{display:flex;align-items:center;justify-content:center;gap:22px;flex-wrap:wrap;font-size:12px;line-height:1.2;text-transform:uppercase;font-weight:700}
.nav a{text-decoration:none}
.nav a:hover{color:var(--primary)}
.app-actions{display:flex;align-items:center;justify-content:flex-end;gap:10px;flex:0 0 auto}
.app-actions .btn{min-height:40px;padding:9px 14px;font-size:11px}
.app-actions .app-login{border-color:transparent;box-shadow:none}
.app-actions .app-register{background:var(--primary);color:#fff}

.page{max-width:var(--container);margin:0 auto;padding:56px 24px 80px}
.home-page{width:100%}
.home-container{width:min(calc(100% - 48px),var(--container));margin:0 auto}
.home-section{padding:72px 0;border-bottom:var(--border-strong);background:#fff}
.home-section.alt{background:var(--surface-variant)}
.section-heading{text-align:center;max-width:760px;margin:0 auto 48px}
.section-heading p{margin-top:14px;color:var(--muted);font-weight:600}
.eyebrow{display:inline-block;margin-bottom:12px;font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:.08em}
.highlight{display:inline;padding:0 .16em;background:var(--primary);color:#fff;box-decoration-break:clone;-webkit-box-decoration-break:clone}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:12px 20px;border:var(--border);border-radius:0;background:var(--primary);color:#fff;font:inherit;font-size:13px;font-weight:800;text-transform:uppercase;letter-spacing:.035em;text-decoration:none;cursor:pointer;box-shadow:4px 4px 0 var(--line);transition:transform .1s,box-shadow .1s,background .1s,color .1s}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--line)}
.btn:active{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--line)}
.btn.secondary{background:#fff;color:var(--secondary)}
.btn.secondary:hover{background:var(--surface-variant)}
.btn.ghost{background:transparent;color:var(--secondary);box-shadow:none}
.actions{display:flex;flex-wrap:wrap;gap:18px;margin-top:30px;align-items:center}
.microcopy{margin-top:14px;color:var(--muted);font-size:13px;line-height:1.5}
.account-hint a{font-weight:800;color:var(--primary)}

.hero-section{padding:64px 0 72px}
.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.hero-copy>p{max-width:640px;margin-top:22px;color:var(--muted);font-size:18px;font-weight:600;line-height:1.6}
.hero-window-wrap{position:relative;padding:0 10px 10px 0}
.hero-window-wrap::after{content:"";position:absolute;inset:10px -2px -2px 10px;border:var(--border);background:rgba(255,109,0,.14);transform:rotate(-2deg);z-index:0}
.service-window{position:relative;z-index:1;border:var(--border);background:#fff;padding:20px;box-shadow:var(--shadow);transform:rotate(1.5deg)}
.window-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;margin-bottom:16px;border-bottom:var(--border)}
.window-lights{display:flex;gap:8px}.window-lights i{display:block;width:12px;height:12px;border:2px solid var(--line)}
.window-lights i:nth-child(1){background:var(--danger)}.window-lights i:nth-child(2){background:var(--warning)}.window-lights i:nth-child(3){background:var(--success)}
.window-label{font-size:10px;font-weight:800;text-transform:uppercase;letter-spacing:.05em}
.window-field{height:38px;border:2px solid var(--line);background:var(--surface-variant);margin-bottom:12px}
.window-message{height:132px;border:2px solid var(--line);background:var(--surface-variant);margin-bottom:14px}
.window-actions{display:flex;justify-content:space-between;gap:16px}.window-actions span{display:block;height:34px;border:2px solid var(--line)}
.window-actions span:first-child{width:34%;background:var(--primary)}.window-actions span:last-child{width:24%;background:var(--secondary)}

.feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px}
.feature-card,.scenario-card,.article-card,.card{border:var(--border);background:#fff;box-shadow:var(--shadow);padding:26px;transition:transform .12s,box-shadow .12s}
.feature-card:hover,.scenario-card:hover,.article-card:hover,.card:hover{transform:translate(-3px,-3px);box-shadow:9px 9px 0 var(--line)}
.feature-icon{width:54px;height:54px;margin-bottom:24px;border:var(--border);display:grid;place-items:center;background:var(--primary);color:#fff;font-size:24px;font-weight:800}
.feature-card p,.scenario-card p,.article-card p,.card p,.card li{margin-top:12px;color:var(--muted)}

.bcc-panel{display:grid;grid-template-columns:1fr 290px;border:var(--border);box-shadow:var(--shadow-orange);background:var(--secondary);color:#fff}
.bcc-copy{padding:42px}.bcc-copy h2{color:#fff}.bcc-copy>p{margin-top:16px;color:#fff;font-weight:700}.warning-list{display:grid;gap:14px;margin:28px 0 0;padding:0;list-style:none}.warning-list li{position:relative;padding-left:28px;font-weight:700}.warning-list li::before{content:"!";position:absolute;left:0;top:0;width:18px;height:18px;border:2px solid var(--primary);color:var(--primary);display:grid;place-items:center;font-size:11px;font-weight:800}
.bcc-stat{display:grid;place-items:center;align-content:center;text-align:center;padding:34px;background:var(--primary);border-left:var(--border)}
.bcc-stat strong{display:block;font-family:Manrope,sans-serif;font-size:76px;line-height:1;color:var(--secondary)}
.bcc-stat span{display:block;margin-top:10px;color:#fff;font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:.06em}

.scenario-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.scenario-card{padding:0;overflow:hidden;text-decoration:none}
.scenario-visual{height:150px;border-bottom:var(--border);display:grid;place-items:center;background:var(--surface-variant);font-family:Manrope,sans-serif;font-size:58px;font-weight:800;color:var(--secondary)}
.scenario-visual.orange{background:#fff0e6;color:var(--primary)}
.scenario-visual.dark{background:var(--secondary);color:#fff}
.scenario-body{padding:20px}.scenario-body h3{font-size:16px}.scenario-body p{font-size:13px}

.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;position:relative}
.steps::before{content:"";position:absolute;top:26px;left:12.5%;right:12.5%;height:3px;background:var(--secondary);z-index:0}
.step{position:relative;z-index:1;text-align:center;padding:0 8px}
.step-number{width:54px;height:54px;margin:0 auto 20px;border:var(--border);background:var(--primary);color:#fff;display:grid;place-items:center;font-family:Manrope,sans-serif;font-weight:800;font-size:20px}
.step h3{font-size:15px}.step p{margin-top:10px;color:var(--muted);font-size:13px}

.legal-banner{display:grid;grid-template-columns:88px 1fr;gap:28px;align-items:center;border:var(--border);box-shadow:var(--shadow-orange);padding:32px;background:#fff}
.legal-icon{width:72px;height:72px;border:var(--border);box-shadow:4px 4px 0 var(--line);background:var(--primary);color:#fff;display:grid;place-items:center;font-size:34px;font-weight:800}
.legal-banner h2{font-size:26px}.legal-banner p{margin-top:12px;color:var(--muted);font-weight:600}.legal-badge{display:inline-flex;align-items:center;gap:8px;margin-top:18px;padding:8px 12px;border:2px solid var(--primary);background:var(--secondary);color:#fff;font-size:11px;font-weight:800;text-transform:uppercase}

.faq{display:grid;gap:16px;max-width:900px;margin:0 auto}
.faq-item{border:var(--border);background:#fff;box-shadow:4px 4px 0 var(--line);padding:0}
.faq-item summary{cursor:pointer;list-style:none;padding:18px 22px;font-size:13px;font-weight:800;text-transform:uppercase;display:flex;justify-content:space-between;gap:20px;align-items:center}
.faq-item summary::-webkit-details-marker{display:none}.faq-item summary::after{content:"+";font-size:20px}.faq-item[open] summary{background:var(--secondary);color:#fff}.faq-item[open] summary::after{content:"−"}.faq-item p{padding:18px 22px;border-top:var(--border);color:var(--muted);font-weight:600}

.article-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.article-card{display:flex;flex-direction:column;padding:14px;text-decoration:none;min-height:100%}
.article-thumb{height:150px;border:var(--border);display:grid;place-items:center;background:var(--surface-variant);font-family:Manrope,sans-serif;font-size:46px;font-weight:800;color:var(--secondary)}
.article-thumb.dark{background:var(--secondary);color:#fff}.article-thumb.orange{background:var(--primary);color:#fff}
.article-card h3{font-size:17px;margin-top:18px}.article-card p{font-size:13px}.article-card .read-more{margin-top:auto;padding-top:18px;color:var(--primary);font-weight:800;text-transform:uppercase;font-size:11px}

.block{margin-top:38px}.panel{border:var(--border);background:#fff;box-shadow:var(--shadow);padding:30px}.panel:nth-of-type(even){background:var(--surface-variant)}
.panel-head{display:grid;grid-template-columns:1fr auto;gap:20px;align-items:end;margin-bottom:24px}.panel-head p{max-width:760px;margin-top:10px;color:var(--muted)}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.card{box-shadow:4px 4px 0 var(--line);padding:22px}.card h3{font-size:17px}.card small,.tag{display:inline-block;margin-bottom:12px;padding:5px 8px;border:2px solid var(--line);background:var(--primary);color:#fff;font-size:10px;font-weight:800;text-transform:uppercase}
.article-card.card{display:grid;align-content:space-between;min-height:220px}.article-card.card>a{margin-top:20px;color:var(--primary);font-weight:800;text-decoration:none;text-transform:uppercase;font-size:11px}
.list{display:grid;gap:12px;margin:0;padding:0;list-style:none}.list li{position:relative;padding-left:28px;color:var(--muted)}.list li::before{content:"✓";position:absolute;left:0;color:var(--primary);font-weight:800}
.notice{border:var(--border);box-shadow:var(--shadow-orange);padding:22px;background:#fff;color:var(--muted)}.notice strong{display:block;margin-bottom:6px;color:var(--secondary);text-transform:uppercase}.notice a{font-weight:800;color:var(--primary)}
.price{display:flex;align-items:baseline;gap:6px;margin:8px 0}.price strong{font-family:Manrope,sans-serif;font-size:38px;color:var(--primary)}.price span{color:var(--muted)}
.table{width:100%;border-collapse:collapse;border:var(--border);background:#fff}.table th,.table td{text-align:left;padding:14px;border-bottom:2px solid var(--line)}.table th{background:var(--secondary);color:#fff;text-transform:uppercase;font-size:12px}.table tr:last-child td{border-bottom:0}
.article{max-width:880px;margin:0 auto}.article p,.article li{font-size:17px;line-height:1.7;color:var(--muted)}.article p{margin-top:18px}.article h2{margin-top:40px}.article ul,.article ol{display:grid;gap:10px;padding-left:24px}
.footer-cta,.final-cta{margin-top:42px;border:var(--border);box-shadow:var(--shadow-orange);padding:30px;background:var(--secondary);color:#fff;display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center}.footer-cta h2,.footer-cta h3,.final-cta h2{color:#fff}.footer-cta p,.final-cta p{margin-top:8px;color:#cfd8dc}.footer-cta .btn,.final-cta .btn{background:var(--primary)}
.details,dl.details{display:grid!important;grid-template-columns:minmax(120px,180px) minmax(0,1fr);column-gap:20px;row-gap:12px;margin:16px 0 0!important;padding:0}.details dt,dl.details dt{font-weight:800;text-transform:uppercase;font-size:12px}.details dd,dl.details dd{margin:0}.details a,dl.details a{word-break:break-word;color:var(--primary);font-weight:700}

.site-footer{max-width:none;margin:0;padding:34px max(24px,calc((100% - var(--container))/2 + 24px));border-top:7px solid var(--primary);background:var(--secondary);color:#cfd8dc;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:12px}
.site-footer::before{content:"Исполнитель: Смирнов Денис Евгеньевич, самозанятый, плательщик НПД, ИНН 505078193424, г. Москва. Поддержка: help@pismolet.ru, +7 916 660 82 59.";flex:1 0 100%;color:#fff;line-height:1.6}
.footer-links{display:flex;flex-wrap:wrap;gap:16px}.site-footer a{text-decoration:underline;text-decoration-thickness:2px}.site-footer a:hover{color:var(--primary)}

@media(max-width:960px){
  .topbar{align-items:flex-start;flex-direction:column;padding-top:12px;padding-bottom:12px}.nav{justify-content:flex-start}.app-actions{justify-content:flex-start;flex-wrap:wrap}
  .hero{grid-template-columns:1fr;gap:42px}.hero-window-wrap{max-width:560px;margin:0 auto}
  .feature-grid,.grid-3{grid-template-columns:1fr}.scenario-grid,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.article-grid{grid-template-columns:1fr}.steps{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px}.steps::before{display:none}
  .bcc-panel{grid-template-columns:1fr}.bcc-stat{border-left:0;border-top:var(--border);min-height:220px}
  .panel-head,.footer-cta,.final-cta{grid-template-columns:1fr;align-items:start}
}

@media(max-width:640px){
  h1{font-size:32px}h2{font-size:26px}.home-container{width:calc(100% - 32px)}.home-section{padding:52px 0}.page{padding:36px 16px 60px}.topbar{padding-left:16px;padding-right:16px}.nav,.app-actions,.footer-links{width:100%}.nav{gap:14px;font-size:11px}.app-actions .btn{flex:1 1 140px}.hero-section{padding-top:46px}.hero-copy>p{font-size:16px}.actions{flex-direction:column;align-items:stretch}.actions .btn{width:100%}.service-window{padding:14px}.window-message{height:104px}
  .feature-grid,.scenario-grid,.grid-2,.grid-3,.grid-4,.steps{grid-template-columns:1fr}.bcc-copy{padding:28px 22px}.bcc-stat strong{font-size:64px}.legal-banner{grid-template-columns:1fr;padding:24px}.legal-icon{width:64px;height:64px}.panel{padding:22px 18px}.card{padding:20px}.details,dl.details{grid-template-columns:1fr;row-gap:5px}.table{display:block;overflow-x:auto}.site-footer{padding:30px 16px}
}