/* =========================================================================
   formular-tools.de — "Formular-Atelier" theme
   Editorial / document-inspired layout: warm paper, ink navy, signal accent,
   perforation lines, monospace field labels, rubber-stamp badges.
   100% self-hosted. No external requests.
   ========================================================================= */

/* ---- Fonts (local) ------------------------------------------------------ */
@font-face{font-family:'Inter';font-style:normal;font-weight:400;font-display:swap;
  src:url('../fonts/inter-latin-400-normal.woff2') format('woff2');}
@font-face{font-family:'Inter';font-style:normal;font-weight:500;font-display:swap;
  src:url('../fonts/inter-latin-500-normal.woff2') format('woff2');}
@font-face{font-family:'Inter';font-style:normal;font-weight:600;font-display:swap;
  src:url('../fonts/inter-latin-600-normal.woff2') format('woff2');}
@font-face{font-family:'Inter';font-style:normal;font-weight:700;font-display:swap;
  src:url('../fonts/inter-latin-700-normal.woff2') format('woff2');}
@font-face{font-family:'Inter';font-style:normal;font-weight:800;font-display:swap;
  src:url('../fonts/inter-latin-800-normal.woff2') format('woff2');}

/* ---- Design tokens ------------------------------------------------------ */
:root{
  --paper:#f3efe4;          /* warm paper background */
  --paper-2:#ece6d7;        /* slightly deeper paper */
  --card:#fbf9f3;           /* card surface */
  --ink:#14182b;            /* deep ink navy */
  --ink-soft:#3a4060;       /* muted ink */
  --ink-faint:#8b8470;      /* faint ink for labels */
  --line:#cdc6b4;           /* hairline on paper */
  --line-ink:rgba(255,255,255,.14);
  --signal:#d8f24a;         /* signal lime — highlighter / primary accent */
  --signal-deep:#a9c419;
  --stamp:#e8402e;          /* stamp red — XRechnung / ZUGFeRD emphasis */
  --stamp-soft:#fbe3df;
  --violet:#4b34e0;         /* secondary accent for links/focus */
  --mono:ui-monospace,'SFMono-Regular',Menlo,Consolas,'Liberation Mono',monospace;
  --sans:'Inter',system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  --maxw:1180px;
  --radius:4px;
  --shadow:0 1px 0 var(--line),0 18px 40px -28px rgba(20,24,43,.45);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;font-family:var(--sans);color:var(--ink);background:var(--paper);
  line-height:1.62;font-size:17px;font-weight:400;
  background-image:
    linear-gradient(var(--line) 1px,transparent 1px),
    linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:100% 100%,28px 100%;
  background-position:0 0;
  background-blend-mode:normal;
  /* faint vertical ledger rules only on wide screens */
}
@media (max-width:760px){body{background-image:none;}}

img{max-width:100%;display:block;}
a{color:var(--violet);text-decoration:none;}
a:hover{text-decoration:underline;}
h1,h2,h3,h4{line-height:1.08;margin:0 0 .4em;font-weight:800;letter-spacing:-.02em;}
h2{font-size:clamp(1.7rem,3.4vw,2.7rem);}
h3{font-size:1.28rem;font-weight:700;letter-spacing:-.01em;}
p{margin:0 0 1.05em;}
::selection{background:var(--signal);color:var(--ink);}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0,0,0,0);border:0;}

/* ---- Field label (monospace) ------------------------------------------- */
.field-label{
  font-family:var(--mono);font-size:.72rem;font-weight:600;letter-spacing:.18em;
  text-transform:uppercase;color:var(--ink-faint);display:inline-flex;align-items:center;gap:.5em;
}
.field-label::before{content:"";width:18px;height:1px;background:var(--ink-faint);display:inline-block;}

/* ---- Buttons ------------------------------------------------------------ */
.btn{
  --c:var(--ink);display:inline-flex;align-items:center;gap:.55em;
  font-weight:700;font-size:.98rem;letter-spacing:.01em;
  padding:.85em 1.4em;border:2px solid var(--ink);border-radius:var(--radius);
  background:var(--ink);color:var(--paper);cursor:pointer;transition:transform .12s ease,box-shadow .12s ease,background .15s;
  box-shadow:4px 4px 0 rgba(20,24,43,.18);
}
.btn:hover{text-decoration:none;transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(20,24,43,.22);}
.btn:active{transform:translate(0,0);box-shadow:2px 2px 0 rgba(20,24,43,.2);}
.btn--signal{background:var(--signal);color:var(--ink);border-color:var(--ink);}
.btn--ghost{background:transparent;color:var(--ink);box-shadow:none;}
.btn--ghost:hover{background:var(--ink);color:var(--paper);}
.btn--stamp{background:var(--stamp);color:#fff;border-color:var(--ink);}

/* ---- Stamp / chip ------------------------------------------------------- */
.stamp{
  display:inline-flex;align-items:center;gap:.45em;font-family:var(--mono);
  font-size:.72rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:var(--stamp);border:2px solid var(--stamp);border-radius:3px;
  padding:.3em .6em;transform:rotate(-2.5deg);background:var(--stamp-soft);
}
.chip{
  display:inline-flex;align-items:center;gap:.4em;font-family:var(--mono);
  font-size:.74rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;
  color:var(--ink-soft);background:var(--card);border:1px solid var(--line);
  border-radius:999px;padding:.35em .8em;
}

/* ---- Header ------------------------------------------------------------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(243,239,228,.85);
  backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--line);}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:70px;gap:18px;}
.brand{display:flex;align-items:center;gap:.6em;font-weight:800;letter-spacing:-.02em;font-size:1.12rem;color:var(--ink);}
.brand:hover{text-decoration:none;}
.brand .mark{width:34px;height:34px;flex:0 0 auto;}
.brand small{display:block;font-family:var(--mono);font-size:.6rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--ink-faint);font-weight:600;margin-top:1px;}
.nav{display:flex;align-items:center;gap:1.4em;}
.nav a{color:var(--ink-soft);font-weight:600;font-size:.95rem;}
.nav a:hover{color:var(--ink);text-decoration:none;}
.nav-cta{display:flex;align-items:center;gap:.7em;}
.lang{display:flex;font-family:var(--mono);font-size:.78rem;font-weight:700;border:1px solid var(--line);border-radius:4px;overflow:hidden;}
.lang a{padding:.3em .6em;color:var(--ink-faint);}
.lang a:hover{text-decoration:none;background:var(--paper-2);}
.lang a.active{background:var(--ink);color:var(--paper);}
.menu-toggle{display:none;background:none;border:0;cursor:pointer;padding:6px;}
.menu-toggle span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;transition:.2s;}

@media (max-width:920px){
  .nav{position:fixed;inset:70px 0 auto 0;flex-direction:column;align-items:flex-start;
    gap:0;background:var(--paper);border-bottom:1px solid var(--line);padding:8px 24px 18px;
    transform:translateY(-120%);transition:transform .25s ease;box-shadow:var(--shadow);}
  .nav.open{transform:translateY(0);}
  .nav a{padding:.7em 0;width:100%;border-bottom:1px solid var(--line);}
  .menu-toggle{display:block;}
  .nav-desktop-cta{display:none;}
}

/* ---- Hero --------------------------------------------------------------- */
.hero{padding:64px 0 40px;position:relative;overflow:hidden;}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
.hero h1{font-size:clamp(2.3rem,5.6vw,4.1rem);letter-spacing:-.035em;margin-top:.35em;}
.hero h1 .hl{background:linear-gradient(transparent 62%,var(--signal) 62%);padding:0 .06em;}
.hero h1 .ink-stamp{color:var(--stamp);}
.hero .lede{font-size:1.16rem;color:var(--ink-soft);max-width:36ch;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}

/* Hero "form card" mockup */
.formcard{
  background:var(--card);border:2px solid var(--ink);border-radius:8px;
  box-shadow:10px 12px 0 rgba(20,24,43,.12);position:relative;overflow:hidden;
  transform:rotate(1.2deg);
}
.formcard::before{content:"";position:absolute;inset:0;background-image:radial-gradient(var(--line) 1px,transparent 1px);
  background-size:16px 16px;opacity:.5;pointer-events:none;}
.formcard__top{display:flex;justify-content:space-between;align-items:center;
  padding:14px 18px;border-bottom:2px dashed var(--line);background:var(--paper-2);position:relative;}
.formcard__perf{position:absolute;left:0;right:0;bottom:-6px;height:12px;
  background:radial-gradient(circle at 6px 6px,var(--paper) 5px,transparent 5px);background-size:16px 12px;}
.formcard__body{padding:20px 18px 22px;position:relative;}
.formrow{display:grid;grid-template-columns:auto 1fr;gap:10px 14px;align-items:baseline;margin-bottom:12px;}
.formrow .k{font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-faint);}
.formrow .v{font-weight:600;border-bottom:1px solid var(--line);padding-bottom:3px;}
.formcard__stamp{position:absolute;right:14px;bottom:14px;
  display:flex;flex-direction:column;align-items:flex-end;gap:7px;}
.formcard__total{display:flex;justify-content:space-between;align-items:center;margin-top:16px;
  padding-top:12px;border-top:2px solid var(--ink);font-weight:800;}
.formcard__xml{font-family:var(--mono);font-size:.62rem;color:var(--ink-faint);margin-top:14px;
  white-space:pre;overflow:hidden;border-left:3px solid var(--signal);padding-left:10px;line-height:1.5;}

@media (max-width:860px){
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .formcard{transform:none;}
  .hero .lede{max-width:none;}
}

/* ---- Marquee logos / trust strip --------------------------------------- */
.trust{border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--paper-2);padding:18px 0;}
.trust .wrap{display:flex;align-items:center;gap:26px;flex-wrap:wrap;justify-content:center;}
.trust .field-label{flex:0 0 auto;}
.trust .tags{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;}

/* ---- Section scaffolding ------------------------------------------------ */
section{padding:74px 0;}
.section-head{max-width:62ch;margin-bottom:40px;}
.section-head .field-label{margin-bottom:14px;}
.section-num{font-family:var(--mono);color:var(--signal-deep);font-weight:700;}

/* ---- Capability grid ---------------------------------------------------- */
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:2px solid var(--ink);
  border-radius:8px;overflow:hidden;background:var(--card);}
.cap{padding:30px 26px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);position:relative;}
.cap:nth-child(3n){border-right:0;}
.cap .num{font-family:var(--mono);font-size:.72rem;letter-spacing:.12em;color:var(--ink-faint);}
.cap h3{margin-top:14px;}
.cap p{font-size:.97rem;color:var(--ink-soft);margin-bottom:0;}
.cap .ico{width:30px;height:30px;color:var(--ink);margin-bottom:6px;}
.cap--hot{background:var(--ink);color:var(--paper);}
.cap--hot .num,.cap--hot p{color:rgba(243,239,228,.7);}
.cap--hot .ico{color:var(--signal);}
.cap--hot h3{color:var(--paper);}
@media (max-width:860px){.cap-grid{grid-template-columns:1fr;}.cap{border-right:0!important;}}

/* ---- Split feature (XRechnung focus) ------------------------------------ */
.split{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;}
.split.rev .split__media{order:2;}
.panel-dark{background:var(--ink);color:var(--paper);border-radius:10px;padding:38px;position:relative;overflow:hidden;
  box-shadow:0 30px 60px -40px rgba(20,24,43,.8);}
.panel-dark h2,.panel-dark h3{color:var(--paper);}
.panel-dark .field-label{color:var(--signal);}
.panel-dark p{color:rgba(243,239,228,.78);}
.panel-dark .bullet{border-color:var(--line-ink);}
/* ---- Standards note (EN 16931 / ZUGFeRD = Factur-X) --------------------- */
.std-note{margin-top:28px;padding:20px 22px;background:var(--card);
  border:1px solid var(--line);border-left:4px solid var(--signal);border-radius:8px;}
.std-note p{margin-top:10px;font-size:.97rem;color:var(--ink-soft);}
.std-note code,.faq code{font-family:var(--mono);font-size:.86em;background:var(--paper-2);
  border:1px solid var(--line);border-radius:3px;padding:.05em .35em;}

.ticklist{list-style:none;padding:0;margin:18px 0 0;}
.ticklist li{display:flex;gap:.7em;align-items:flex-start;padding:.55em 0;border-top:1px solid var(--line);font-size:1.02rem;}
.panel-dark .ticklist li{border-top:1px solid var(--line-ink);}
.ticklist li::before{content:"";flex:0 0 auto;width:20px;height:20px;margin-top:2px;border-radius:4px;
  background:var(--signal);
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='black' d='M9.55 17.6 4 12.05l1.4-1.4 4.15 4.15L18.6 5.4 20 6.8z'/%3E%3C/svg%3E") center/contain no-repeat;
          mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='black' d='M9.55 17.6 4 12.05l1.4-1.4 4.15 4.15L18.6 5.4 20 6.8z'/%3E%3C/svg%3E") center/contain no-repeat;}
@media (max-width:860px){.split{grid-template-columns:1fr;gap:30px;}.split.rev .split__media{order:0;}}

/* ---- Flow / pipeline ---------------------------------------------------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:step;}
.flow .step{background:var(--card);border:2px solid var(--ink);border-radius:8px;padding:22px 20px;position:relative;}
.flow .step::before{counter-increment:step;content:"0" counter(step);position:absolute;top:-14px;left:18px;
  font-family:var(--mono);font-weight:800;font-size:.78rem;background:var(--signal);color:var(--ink);
  border:2px solid var(--ink);border-radius:4px;padding:.2em .5em;}
.flow .step h3{font-size:1.05rem;margin-top:8px;}
.flow .step p{font-size:.92rem;color:var(--ink-soft);margin:0;}
.flow .arrow{display:none;}
@media (max-width:860px){.flow{grid-template-columns:1fr;}}

/* ---- Storage / archive targets ----------------------------------------- */
.targets{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;}
.target{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:20px 16px;text-align:center;
  transition:transform .14s,border-color .14s,box-shadow .14s;}
.target:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--shadow);}
.target .ico{width:34px;height:34px;margin:0 auto 10px;color:var(--ink);}
.target strong{display:block;font-size:1rem;}
.target span{font-family:var(--mono);font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint);}
@media (max-width:860px){.targets{grid-template-columns:repeat(2,1fr);}}

/* ---- Logo wall (partners / platforms) ----------------------------------- */
.logos-band{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--paper-2);padding:46px 0;}
.logos-band .field-label{justify-content:center;text-align:center;width:100%;margin-bottom:26px;}
.logo-wall{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:30px 46px;}
.logo-wall img{height:46px;width:auto;max-width:160px;object-fit:contain;
  filter:grayscale(1) contrast(.9) opacity(.78);transition:filter .2s ease,transform .2s ease;}
.logo-wall img:hover{filter:none;transform:translateY(-2px);}
@media (max-width:760px){.logo-wall{gap:24px 30px;}.logo-wall img{height:38px;}}

/* footer brand logo */
.foot-logo{height:34px;width:auto;margin-bottom:12px;display:block;}

/* ---- Audience cards ----------------------------------------------------- */
.aud{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.aud .card{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--stamp);border-radius:8px;padding:26px;}
.aud .card h3{font-size:1.1rem;}
.aud .card p{font-size:.95rem;color:var(--ink-soft);margin:0;}
@media (max-width:860px){.aud{grid-template-columns:1fr;}}

/* ---- FAQ ---------------------------------------------------------------- */
.faq{max-width:820px;margin:0 auto;}
.faq details{border:1px solid var(--line);border-radius:8px;background:var(--card);margin-bottom:12px;overflow:hidden;}
.faq summary{cursor:pointer;padding:18px 22px;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:1em;align-items:center;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{content:"+";font-family:var(--mono);font-size:1.3rem;color:var(--signal-deep);transition:transform .2s;}
.faq details[open] summary::after{transform:rotate(45deg);}
.faq details p{padding:0 22px 20px;margin:0;color:var(--ink-soft);}

/* ---- CTA band ----------------------------------------------------------- */
.cta-band{background:var(--ink);color:var(--paper);border-radius:12px;padding:48px;text-align:center;position:relative;overflow:hidden;}
.cta-band h2{color:var(--paper);}
.cta-band p{color:rgba(243,239,228,.78);max-width:52ch;margin:0 auto 22px;}
.cta-band::after{content:"§";position:absolute;right:24px;bottom:-20px;font-size:9rem;font-weight:800;color:rgba(255,255,255,.05);}

/* ---- Contact form ------------------------------------------------------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:48px;align-items:start;}
.form-card{background:var(--card);border:2px solid var(--ink);border-radius:10px;padding:30px;box-shadow:var(--shadow);}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{margin-bottom:16px;}
.field label{display:block;font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ink-faint);font-weight:600;margin-bottom:6px;}
.field input,.field select,.field textarea{width:100%;font-family:var(--sans);font-size:1rem;color:var(--ink);
  background:var(--paper);border:1px solid var(--line);border-radius:5px;padding:.7em .85em;transition:border-color .15s,box-shadow .15s;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--violet);
  box-shadow:0 0 0 3px rgba(75,52,224,.16);}
.field textarea{min-height:130px;resize:vertical;}
.consent{display:flex;gap:.7em;align-items:flex-start;font-size:.86rem;color:var(--ink-soft);}
.consent input{width:auto;margin-top:3px;}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden;}
.form-note{font-size:.82rem;color:var(--ink-faint);margin-top:14px;}
.form-status{display:none;padding:12px 16px;border-radius:6px;font-weight:600;margin-bottom:16px;}
.form-status.ok{display:block;background:#e6f5e1;color:#22591a;border:1px solid #b6deab;}
.form-status.err{display:block;background:var(--stamp-soft);color:#9a2418;border:1px solid #efb3aa;}
.contact-aside .ticklist li{border-color:var(--line);}
.contact-aside .field-label{margin-bottom:16px;}
.contact-aside .vcard{margin-top:24px;font-size:.95rem;color:var(--ink-soft);}
.contact-aside .vcard a{font-weight:600;}
@media (max-width:860px){.contact-grid{grid-template-columns:1fr;gap:32px;}.form-row{grid-template-columns:1fr;}}

/* ---- Footer ------------------------------------------------------------- */
.site-footer{background:var(--paper-2);border-top:1px solid var(--line);padding:48px 0 30px;font-size:.92rem;}
.foot-grid{display:grid;grid-template-columns:1.8fr 1fr 1.3fr 1fr;gap:30px;margin-bottom:30px;}
.foot-contact address{font-style:normal;color:var(--ink-soft);line-height:1.7;margin:0 0 .5em;}
.foot-contact a{color:var(--ink-soft);font-weight:600;}
.foot-contact .ft-row{display:flex;gap:.5em;}
.foot-contact .ft-row .lbl{font-family:var(--mono);font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--ink-faint);min-width:3.1em;padding-top:.15em;}
@media (max-width:980px){.foot-grid{grid-template-columns:1fr 1fr;}}
.site-footer h4{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint);font-weight:600;}
.site-footer ul{list-style:none;padding:0;margin:0;}
.site-footer li{margin-bottom:.5em;}
.site-footer a{color:var(--ink-soft);}
.foot-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;padding-top:20px;border-top:1px solid var(--line);
  font-size:.84rem;color:var(--ink-faint);}
@media (max-width:760px){.foot-grid{grid-template-columns:1fr;}}

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