:root{
    --bg:#EAE7DD;
    --surface:#F2F0E6;
    --paper:#F8F5EC;
    --ink-text:#1B2233;
    --text-hi:#1B2233;
    --text-mid:#4B5164;
    --text-dim:#6E7488;
    --line: rgba(27,34,51,0.10);
    --line-strong: rgba(27,34,51,0.22);
    --header-bg: rgba(234,231,221,0.86);
    --grain-dot: rgba(0,0,0,0.035);
    --accent:#A9661C;
    --accent-ring: rgba(169,102,28,0.32);
    --mustard:#D9A441;
    --mustard-dim:#B98730;
    --teal:#2F6F4E;
    --radius:2px;
  }
  [data-theme="dark"]{
    --bg:#0F1626;
    --surface:#161F35;
    --paper:#F3EFE3;
    --ink-text:#1B2233;
    --text-hi:#F3EFE3;
    --text-mid:#AEB4C4;
    --text-dim:#7B8296;
    --line: rgba(243,239,227,0.08);
    --line-strong: rgba(243,239,227,0.25);
    --header-bg: rgba(15,22,38,0.86);
    --grain-dot: rgba(255,255,255,0.025);
    --accent:#D9A441;
    --accent-ring: rgba(217,164,65,0.4);
    --teal:#3E8573;
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--bg);
    color:var(--text-hi);
    font-family:'Inter',sans-serif;
    line-height:1.55;
    overflow-x:hidden;
    transition:background .25s ease, color .25s ease;
  }
  h1,h2,h3,.display{
    font-family:'Space Grotesk',sans-serif;
    font-weight:600;
    letter-spacing:-0.01em;
  }
  .mono{font-family:'IBM Plex Mono',monospace;}
  a{color:inherit;text-decoration:none;}
  img{max-width:100%;display:block;}
  :focus-visible{outline:2px solid var(--accent);outline-offset:3px;}
  .wrap{max-width:1180px;margin:0 auto;padding:0 32px;}

  /* ---------- background texture ---------- */
  .grain{
    position:fixed;inset:0;pointer-events:none;z-index:0;
    background-image:radial-gradient(var(--grain-dot) 1px, transparent 1px);
    background-size:3px 3px;
  }

  /* ---------- header ---------- */
  header{
    position:sticky;top:0;z-index:50;
    background:var(--header-bg);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
    transition:background .25s ease, border-color .25s ease;
  }
  .nav{
    position:relative;
    display:flex;align-items:center;justify-content:space-between;
    padding:18px 0;gap:16px;
  }
  .logo{
    font-family:'IBM Plex Mono',monospace;
    color:var(--text-hi);
    display:flex;align-items:center;gap:10px;
  }
  .logo-icon{width:44px;height:44px;border-radius:9px;flex:none;display:block;}
  .logo .l-text{display:flex;flex-direction:column;line-height:1.25;}
  .logo .l-text .brand{font-size:14px;font-weight:600;letter-spacing:.02em;}
  .logo .l-text .product{font-size:10.5px;color:var(--text-dim);}
  .nav-links{display:flex;gap:36px;align-items:center;}
  .nav-links a{
    font-size:14px;color:var(--text-mid);
    transition:color .2s;
  }
  .nav-links a:hover{color:var(--text-hi);}
  .btn{
    display:inline-flex;align-items:center;gap:8px;
    padding:11px 20px;
    font-family:'IBM Plex Mono',monospace;
    font-size:13px;font-weight:500;
    border-radius:var(--radius);
    border:1px solid transparent;
    cursor:pointer;
    transition:transform .15s ease, background .2s ease, border-color .2s ease, color .2s ease;
  }
  .btn-primary{background:var(--mustard);color:#1B2233;}
  .btn-primary:hover{background:var(--mustard-dim);transform:translateY(-1px);}
  .btn-ghost{border-color:var(--line-strong);color:var(--text-hi);}
  .btn-ghost:hover{border-color:var(--accent);color:var(--accent);}
  .nav .btn{display:none;}
  @media(min-width:860px){ .nav .btn{display:inline-flex;} }

  .nav-toggle{
    display:none;flex-direction:column;justify-content:center;align-items:center;gap:4px;
    width:36px;height:36px;flex:none;
    border:1px solid var(--line-strong);border-radius:4px;background:transparent;cursor:pointer;
  }
  .nav-toggle span{display:block;width:16px;height:2px;background:var(--text-hi);transition:transform .2s ease, opacity .2s ease;}
  .nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
  .nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
  .nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

  @media(max-width:760px){
    .nav-toggle{display:flex;}
    .nav-links{
      position:absolute;top:100%;left:0;right:0;z-index:60;
      flex-direction:column;align-items:stretch;gap:0;
      background:var(--header-bg);backdrop-filter:blur(10px);
      border-bottom:1px solid var(--line);
      max-height:0;overflow:hidden;
      transition:max-height .3s ease;
    }
    .nav-links.open{max-height:320px;}
    .nav-links a{padding:14px 32px;border-top:1px solid var(--line);}
    .nav-links a:first-child{border-top:none;}
  }

  /* theme toggle */
  .theme-toggle{
    flex:none;width:36px;height:36px;border-radius:50%;
    border:1px solid var(--line-strong);
    background:transparent;color:var(--text-hi);
    display:flex;align-items:center;justify-content:center;
    cursor:pointer;font-size:15px;line-height:1;
    transition:border-color .2s ease, color .2s ease;
  }
  .theme-toggle:hover{border-color:var(--accent);color:var(--accent);}
  .theme-toggle .icon-sun,.theme-toggle .icon-moon{display:none;}
  html[data-theme="light"] .theme-toggle .icon-moon{display:block;}
  html[data-theme="dark"] .theme-toggle .icon-sun{display:block;}

  /* ---------- hero ---------- */
  .hero{
    position:relative;z-index:1;
    padding:96px 0 80px;
    display:grid;grid-template-columns:1fr;gap:56px;
  }
  @media(min-width:960px){ .hero{grid-template-columns:1.05fr 0.95fr;align-items:center;} }

  .eyebrow{
    font-family:'IBM Plex Mono',monospace;
    font-size:12px;letter-spacing:.14em;text-transform:uppercase;
    color:var(--accent);
    display:flex;align-items:center;gap:10px;margin-bottom:18px;
  }
  .eyebrow::before{content:"";width:20px;height:1px;background:var(--accent);}
  .hero h1{
    font-size:clamp(34px,5vw,54px);
    line-height:1.08;
    color:var(--text-hi);
    max-width:15ch;
  }
  .hero p.lead{
    margin-top:22px;
    font-size:17px;
    color:var(--text-mid);
    max-width:46ch;
  }
  .hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}

  /* ticket mock */
  .invoice-carousel{
    position:relative;display:grid;
    transform:rotate(1deg);
  }
  .invoice-carousel .ticket{grid-area:1/1;}
  .invoice-carousel .ticket{
    transition:opacity .6s ease, transform .6s ease;
    transform:translateY(0);
  }
  .invoice-carousel .ticket.is-hidden{
    opacity:0;transform:translateY(10px);pointer-events:none;
  }
  .carousel-dots{display:flex;justify-content:center;gap:9px;margin-top:18px;}
  .carousel-dots .dot{
    width:8px;height:8px;border-radius:50%;padding:0;
    border:1.5px solid var(--line-strong);background:transparent;cursor:pointer;
    transition:background .2s ease, border-color .2s ease;
  }
  .carousel-dots .dot.active{background:var(--accent);border-color:var(--accent);}

  .ticket{
    position:relative;
    background:var(--paper);
    color:var(--ink-text);
    border-radius:var(--radius);
    padding:28px 26px 24px;
    box-shadow:0 30px 60px -20px rgba(0,0,0,0.35);
  }
  .ticket::before{
    content:"";
    position:absolute;left:0;right:0;bottom:-1px;height:14px;
    background-image:radial-gradient(circle at 8px 7px, var(--bg) 6px, transparent 6.5px);
    background-size:16px 14px;
    background-repeat:repeat-x;
  }
  .ticket-head{
    display:flex;justify-content:space-between;align-items:flex-start;gap:16px;
    padding-bottom:14px;margin-bottom:14px;
    border-bottom:2px solid var(--ink-text);
  }
  .inv-brand-name{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:15px;letter-spacing:.01em;}
  .inv-brand-meta{font-family:'IBM Plex Mono',monospace;font-size:10.5px;color:#6B7180;margin-top:4px;}
  .inv-doc{text-align:right;flex:none;}
  .inv-doc-title{font-family:'IBM Plex Mono',monospace;font-size:13px;font-weight:700;letter-spacing:.1em;}
  .inv-doc-num{font-family:'IBM Plex Mono',monospace;font-size:11px;color:#6B7180;margin-top:4px;}

  .inv-cai{
    display:grid;grid-template-columns:repeat(3,1fr);gap:10px;
    background:rgba(27,34,51,0.04);
    border:1px dashed rgba(27,34,51,0.25);
    border-radius:3px;
    padding:10px 12px;margin-bottom:14px;
  }
  .inv-cai div span:first-child{display:block;font-family:'IBM Plex Mono',monospace;font-size:9px;letter-spacing:.06em;text-transform:uppercase;color:#8A8F9C;margin-bottom:3px;}
  .inv-cai .mono{font-family:'IBM Plex Mono',monospace;font-size:10px;word-break:break-all;color:#333A4A;}

  .inv-client{
    display:flex;flex-wrap:wrap;gap:6px 20px;
    font-family:'IBM Plex Mono',monospace;font-size:12px;color:#333A4A;
    margin-bottom:14px;
  }
  .inv-client span{color:#8A8F9C;margin-right:6px;}

  .inv-table{width:100%;border-collapse:collapse;margin-bottom:14px;table-layout:fixed;}
  .inv-table th{
    font-family:'IBM Plex Mono',monospace;font-size:10px;text-transform:uppercase;letter-spacing:.05em;
    color:#8A8F9C;text-align:left;padding-bottom:6px;border-bottom:1px solid rgba(27,34,51,0.2);
  }
  .inv-table th:nth-child(3),.inv-table td:nth-child(3),
  .inv-table th:last-child,.inv-table td:last-child{text-align:right;}
  .inv-table th:first-child,.inv-table td:first-child{width:10%;}
  .inv-table th:nth-child(2),.inv-table td:nth-child(2){width:38%;}
  .inv-table th:nth-child(3),.inv-table td:nth-child(3){width:25%;}
  .inv-table th:nth-child(4),.inv-table td:nth-child(4){width:27%;}
  .inv-table td{
    font-family:'IBM Plex Mono',monospace;font-size:12px;padding:7px 4px 7px 0;color:#333A4A;
    border-bottom:1px solid rgba(27,34,51,0.08);
    word-wrap:break-word;overflow-wrap:break-word;
  }
  @media(max-width:400px){
    .inv-table th,.inv-table td{font-size:10.5px;}
  }

  .inv-totals{margin-left:auto;max-width:230px;display:flex;flex-direction:column;gap:6px;margin-bottom:14px;}
  .inv-totals div{display:flex;justify-content:space-between;font-family:'IBM Plex Mono',monospace;font-size:12.5px;color:#4B5164;}
  .inv-total-final{border-top:1px solid rgba(27,34,51,0.25);padding-top:8px;margin-top:4px;}
  .inv-total-final span{font-size:15px;font-weight:700;color:var(--ink-text);}

  .inv-foot{
    text-align:center;font-family:'IBM Plex Mono',monospace;font-size:10px;font-style:italic;
    color:#8A8F9C;padding-top:10px;border-top:1px dashed rgba(27,34,51,0.25);
  }
  .inv-credit{
    display:flex;align-items:center;justify-content:center;gap:8px;
    margin-top:14px;
  }
  .inv-credit span{font-family:'IBM Plex Mono',monospace;font-size:10.5px;color:#9BA1AE;letter-spacing:.03em;}
  .inv-credit img{height:30px;opacity:0.9;}
  @media(max-width:480px){ .inv-cai{grid-template-columns:1fr 1fr;} .wrap{padding:0 26px;} }
  @media(max-width:400px){ .inv-cai{grid-template-columns:1fr;} }
  @media(max-width:700px){
      section{padding:60px 0;}
      .hero{padding:76px 0 44px;}
      .hero-copy{text-align:center;}
      .hero-copy .eyebrow{justify-content:center;}
      .hero-copy h1,.hero-copy p.lead{margin-left:auto;margin-right:auto;}
      .hero-cta{justify-content:center;}
    }

  /* ---------- section shell ---------- */
  section{position:relative;z-index:1;padding:88px 0;}
  .section-head{max-width:60ch;margin-bottom:52px;}
  .section-head h2{font-size:clamp(26px,3.4vw,36px);color:var(--text-hi);}
  .section-head p{color:var(--text-mid);margin-top:14px;font-size:15.5px;}

  /* ---------- modules ---------- */
  .mod-groups{display:grid;grid-template-columns:1fr;gap:18px;}
  @media(min-width:800px){ .mod-groups{grid-template-columns:1fr 1fr;} }
  .mod-group{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius);
    padding:24px 24px 8px;
    transition:border-color .25s;
  }
  .mod-group:hover{border-color:var(--accent-ring);}
  .mod-group-title{
    font-family:'IBM Plex Mono',monospace;
    font-size:11px;letter-spacing:.12em;text-transform:uppercase;
    color:var(--accent);margin-bottom:16px;
    display:flex;align-items:center;gap:10px;
  }
  .mod-group-title::after{content:"";flex:1;height:1px;background:var(--line);}
  .mod-item{
    display:flex;gap:12px;align-items:flex-start;
    padding:12px 0;
    border-top:1px solid var(--line);
  }
  .mod-item:first-of-type{border-top:none;}
  .mod-check{
    flex:none;width:16px;height:16px;margin-top:2px;
    border:1.5px solid var(--accent);border-radius:3px;
    position:relative;
  }
  .mod-check::after{
    content:"";position:absolute;left:3px;top:0px;width:4px;height:8px;
    border-right:2px solid var(--accent);border-bottom:2px solid var(--accent);
    transform:rotate(40deg);
  }
  .mi-name{font-size:14.5px;font-weight:500;color:var(--text-hi);}
  .mi-desc{font-size:13px;color:var(--text-dim);margin-top:3px;}

  /* ---------- how it works ---------- */
  .steps{display:grid;grid-template-columns:1fr;gap:0;counter-reset:step;}
  @media(min-width:800px){ .steps{grid-template-columns:repeat(3,1fr);} }
  .step{
    padding:26px 24px;position:relative;
    border-top:1px solid var(--line);
  }
  @media(min-width:800px){
    .step{border-top:none;border-left:1px solid var(--line);}
    .step:first-child{border-left:none;}
  }
  .step-num{
    font-family:'IBM Plex Mono',monospace;
    font-size:12px;color:var(--accent);margin-bottom:12px;
  }
  .step h3{font-size:17px;color:var(--text-hi);margin-bottom:8px;}
  .step p{font-size:14px;color:var(--text-mid);}

  /* ---------- pricing / stamp ---------- */
  .pricing{
    display:grid;grid-template-columns:1fr;gap:48px;align-items:center;
  }
  @media(min-width:900px){ .pricing{grid-template-columns:0.85fr 1.15fr;} }
  .stamp-wrap{display:flex;justify-content:center;}
  .stamp{
    width:220px;height:220px;border-radius:50%;
    border:3px double var(--accent);
    display:flex;align-items:center;justify-content:center;
    text-align:center;
    transform:rotate(-9deg);
    color:var(--accent);
    font-family:'IBM Plex Mono',monospace;
    position:relative;
    flex:none;
  }
  .stamp::after{
    content:"";position:absolute;inset:10px;border:1px solid var(--accent-ring);border-radius:50%;
  }
  .stamp-text{
    font-size:13px;font-weight:600;letter-spacing:.08em;line-height:1.5;
    text-transform:uppercase;
    padding:0 26px;
  }
  .pricing-copy h2{font-size:clamp(24px,3vw,32px);color:var(--text-hi);margin-bottom:16px;}
  .pricing-copy p{color:var(--text-mid);font-size:15.5px;max-width:52ch;}
  .pricing-points{margin-top:24px;display:flex;flex-direction:column;gap:12px;}
  .pricing-points div{
    display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--text-mid);
  }
  .pricing-points .m{color:var(--accent);font-family:'IBM Plex Mono',monospace;font-size:12px;padding-top:3px;}

  /* ---------- contact ---------- */
  .contact-card{
    position:relative;
    background:var(--paper);color:var(--ink-text);
    border-radius:var(--radius);
    padding:40px clamp(24px,5vw,52px) 44px;
    max-width:760px;margin:0 auto;
    box-shadow:0 30px 70px -25px rgba(0,0,0,0.35);
  }
  .contact-card::before,.contact-card::after{
    content:"";position:absolute;left:0;right:0;height:14px;
    background-image:radial-gradient(circle at 8px 7px, var(--bg) 6px, transparent 6.5px);
    background-size:16px 14px;background-repeat:repeat-x;
  }
  .contact-card::before{top:-1px;}
  .contact-card::after{bottom:-1px;}
  .contact-card h2{font-size:26px;margin-bottom:8px;}
  .contact-brand{height:60px;margin-bottom:22px;}
  .contact-card > p{color:#5B6272;font-size:14.5px;margin-bottom:28px;}
  form{display:grid;grid-template-columns:1fr;gap:16px;}
  @media(min-width:600px){ form{grid-template-columns:1fr 1fr;} }
  form .full{grid-column:1/-1;}
  label{
    font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.06em;
    text-transform:uppercase;color:#6B7180;display:block;margin-bottom:6px;
  }
  input,textarea{
    width:100%;border:1px solid rgba(27,34,51,0.22);
    background:rgba(255,255,255,0.5);
    border-radius:var(--radius);
    padding:11px 12px;font-family:'Inter',sans-serif;font-size:16px;color:var(--ink-text);
  }
  input:focus,textarea:focus{border-color:var(--mustard-dim);}
  textarea{resize:vertical;min-height:90px;}
  form .full.actions{display:flex;align-items:center;gap:16px;margin-top:6px;}
  .form-note{font-size:12px;color:#8A8F9C;}

  /* ---------- footer ---------- */
  footer{
    padding:40px 0 60px;
    border-top:1px solid var(--line);
    display:flex;flex-wrap:wrap;gap:16px;
    justify-content:space-between;align-items:center;
  }
  footer .f-logo{font-family:'IBM Plex Mono',monospace;font-size:13px;color:var(--text-dim);display:flex;align-items:center;gap:8px;}
  footer .f-logo img{width:18px;height:18px;border-radius:4px;flex:none;}
  footer .f-links{display:flex;gap:20px;font-size:13px;color:var(--text-dim);}

  /* ---------- reveal ---------- */
  .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s ease;}
  .reveal.in{opacity:1;transform:translateY(0);}
  @media (prefers-reduced-motion: reduce){
    .reveal{opacity:1;transform:none;transition:none;}
    .invoice-carousel .ticket{transition:none;}
    html{scroll-behavior:auto;}
  }

  /* ---------- whatsapp floating button ---------- */
  .whatsapp-float{
    position:fixed;
    right:20px;
    bottom:calc(20px + env(safe-area-inset-bottom));
    z-index:90;
    width:58px;height:58px;
    border-radius:50%;
    background:#25D366;
    display:flex;align-items:center;justify-content:center;
    box-shadow:0 8px 24px rgba(37,211,102,0.45);
    transition:transform .2s ease, box-shadow .2s ease;
  }
  .whatsapp-float:hover{transform:scale(1.08);box-shadow:0 10px 30px rgba(37,211,102,0.55);}
  .whatsapp-float svg{position:relative;z-index:1;}
  .whatsapp-float::before{
    content:"";
    position:absolute;inset:0;border-radius:50%;
    background:#25D366;
    animation:wa-pulse 2.4s ease-out infinite;
  }
  @keyframes wa-pulse{
    0%{transform:scale(1);opacity:.55;}
    100%{transform:scale(1.9);opacity:0;}
  }
  @media(max-width:480px){
    .whatsapp-float{width:52px;height:52px;right:16px;bottom:calc(16px + env(safe-area-inset-bottom));}
  }
  @media (prefers-reduced-motion: reduce){
    .whatsapp-float::before{animation:none;}
  }