/* ============================================================
   ALPH4DIGITEC — alph4digitec.com
   Shared stylesheet. Dark, schematic, single committed theme.
   A company that builds infrastructure should look like it
   draws systems: hairlines, mono annotation, everything on a
   grid. Every colour comes from a token; nothing is inherited
   from the host page.
   ============================================================ */

:root{
  /* ground + surfaces — neutrals pulled toward the brand navy */
  --ground:      #060A18;
  --ground-2:    #040711;
  --surface:     #0D1428;
  --surface-2:   #131C36;
  --line:        #1E2A4E;
  --line-soft:   #16203C;
  --grid:        rgba(76,125,255,.055);

  /* type */
  --ink:   #E6EBFA;
  --ink-2: #97A2C4;
  --ink-3: #626D95;

  /* accent — the A4 mark's own blue-to-violet */
  --accent: #4C7DFF;
  --violet: #7B3FE4;
  --grad:   linear-gradient(120deg,#3B74FF 0%,#6C4AF0 55%,#7B3FE4 100%);
  --wash:   rgba(76,125,255,.10);

  /* semantic status — deliberately NOT the accent */
  --settled: #3DD68C;
  --pending: #8AA2D8;
  --failed:  #F2666B;

  --r: 4px;

  --display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --body:    "Instrument Sans", "Helvetica Neue", Arial, sans-serif;
  --mark:    "Jost", "Century Gothic", "Helvetica Neue", Arial, sans-serif;
  --mono:    "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --max: 1180px;
  --pad: clamp(20px, 5vw, 56px);
}

*,*::before,*::after{ box-sizing:border-box; }

html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion:reduce){ html{ scroll-behavior:auto; } }

body{
  margin:0;
  background:var(--ground);
  color:var(--ink);
  font-family:var(--body);
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  /* the blueprint grid */
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size:56px 56px;
}

h1,h2,h3,h4{
  font-family:var(--display);
  font-variation-settings:"wdth" 112,"wght" 700;
  font-weight:700;
  letter-spacing:-.025em;
  line-height:1.05;
  text-wrap:balance;
  margin:0;
}

p{ margin:0; }
a{ color:inherit; }

:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:3px;
  border-radius:2px;
}

.wrap{ max-width:var(--max); margin-inline:auto; padding-inline:var(--pad); }

.skip-link{
  position:absolute; left:-9999px; top:0;
  background:var(--accent); color:#fff;
  padding:10px 16px; z-index:100; border-radius:0 0 var(--r) 0;
}
.skip-link:focus{ left:0; }

/* ---- eyebrow: the recurring structural label ---- */
.eyebrow{
  font-family:var(--mono);
  font-size:11px; font-weight:500;
  letter-spacing:.18em; text-transform:uppercase;
  color:var(--ink-3);
  display:flex; align-items:center; gap:10px;
}
.eyebrow::before{
  content:""; width:18px; height:1px;
  background:var(--accent); flex:none;
}

/* ============================ NAV ============================ */
.nav{
  position:sticky; top:0; z-index:50;
  background:rgba(6,10,24,.9);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-soft);
}
.nav-in{
  max-width:var(--max); margin-inline:auto;
  padding:14px var(--pad);
  display:flex; align-items:center; gap:34px;
}

/* ---- brand lockup: A4 monogram + ALPH4 DIGITEC wordmark ---- */
.logo{
  display:inline-flex; align-items:center; gap:11px;
  text-decoration:none; white-space:nowrap;
}
.logo img{ width:32px; height:32px; border-radius:7px; display:block; flex:none; }
.logo .word{
  font-family:var(--mark); line-height:1;
  display:flex; flex-direction:column; gap:3px;
}
.logo .a{ font-size:17px; font-weight:500; letter-spacing:.20em; color:var(--ink); }
.logo .d{ font-size:8.5px; font-weight:400; letter-spacing:.36em; color:var(--ink-3); }

.nav-links{ display:flex; gap:26px; margin-right:auto; font-size:14.5px; }
.nav-links a{ color:var(--ink-2); text-decoration:none; transition:color .15s; }
.nav-links a:hover{ color:var(--ink); }
.nav-cta{ display:flex; gap:10px; align-items:center; }

.btn{
  font-family:var(--body); font-size:14.5px; font-weight:600;
  padding:10px 18px; border-radius:var(--r);
  border:1px solid transparent; text-decoration:none;
  display:inline-flex; align-items:center; gap:8px;
  cursor:pointer; white-space:nowrap;
  transition:background .15s,border-color .15s,color .15s,transform .15s,box-shadow .15s;
}
.btn-primary{
  background:var(--grad); background-size:140% 100%; color:#fff;
  box-shadow:0 6px 20px -8px rgba(76,125,255,.7);
}
.btn-primary:hover{
  background-position:100% 0; transform:translateY(-1px);
  box-shadow:0 10px 26px -8px rgba(123,63,228,.8);
}
.btn-ghost{ border-color:var(--line); color:var(--ink); background:transparent; }
.btn-ghost:hover{ border-color:var(--ink-3); background:var(--surface); }
.btn-lg{ padding:14px 24px; font-size:16px; }

/* ============================ HERO ============================ */
.hero{ padding:clamp(56px,9vw,110px) 0 clamp(40px,6vw,72px); position:relative; }
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
  gap:clamp(32px,5vw,64px);
  align-items:center;
}
.hero h1{ font-size:clamp(38px,5.2vw,62px); margin-top:22px; }
.hero h1 em{
  font-style:normal;
  background:var(--grad);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero-sub{
  color:var(--ink-2);
  font-size:clamp(16.5px,1.5vw,18.5px);
  max-width:50ch; margin-top:20px;
}
.hero-cta{ display:flex; flex-wrap:wrap; gap:12px; margin-top:30px; }

/* ---- schematic: the company drawn as a system ---- */
.schema{
  border:1px solid var(--line); border-radius:10px;
  background:var(--surface);
  padding:24px clamp(16px,3vw,26px) 26px;
  box-shadow:0 30px 70px -34px rgba(0,0,0,.9);
}
.schema-lbl{
  font-family:var(--mono); font-size:10.5px;
  letter-spacing:.16em; text-transform:uppercase; color:var(--ink-3);
  padding-bottom:16px; border-bottom:1px solid var(--line-soft);
  display:flex; justify-content:space-between; gap:12px;
}
.node{
  display:grid; grid-template-columns:26px 1fr auto;
  gap:0 14px; align-items:center;
  padding:15px 0; border-bottom:1px solid var(--line-soft);
}
.node:last-child{ border-bottom:0; }
.node .ix{ font-family:var(--mono); font-size:11px; color:var(--accent); }
.node .nm{ font-size:15.5px; font-weight:500; }
.node .tag{
  font-family:var(--mono); font-size:10.5px;
  letter-spacing:.1em; text-transform:uppercase; color:var(--ink-3);
  border:1px solid var(--line); border-radius:99px; padding:3px 10px;
}
.schema-foot{
  margin-top:16px; padding-top:14px; border-top:1px solid var(--line-soft);
  font-family:var(--mono); font-size:10.5px; color:var(--ink-3); letter-spacing:.06em;
}

/* ============================ SECTIONS ============================ */
section{ padding:clamp(60px,8vw,104px) 0; }
.band{ background:var(--ground-2); border-block:1px solid var(--line-soft); }
.sec-head{ max-width:60ch; }
.sec-head h2{ font-size:clamp(30px,4vw,46px); margin-top:16px; }
.sec-head p{ color:var(--ink-2); margin-top:16px; font-size:17.5px; }

/* ---- statement band: the positioning line, given its own air ---- */
.statement{
  font-family:var(--display);
  font-variation-settings:"wdth" 104,"wght" 600;
  font-size:clamp(20px,2.6vw,30px);
  line-height:1.32;
  letter-spacing:-.02em;
  max-width:34ch;
  text-wrap:balance;
}
.statement em{
  font-style:normal;
  background:var(--grad);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}

/* ---- what we do: a stack of system layers ---- */
.layers{
  margin-top:48px; padding:0; list-style:none;
  border:1px solid var(--line); border-radius:10px; overflow:hidden;
}
.layer{
  display:grid;
  grid-template-columns:64px minmax(0,300px) minmax(0,1fr);
  gap:0 clamp(16px,3vw,36px); align-items:center;
  padding:26px clamp(18px,3vw,30px);
  border-bottom:1px solid var(--line-soft);
  background:var(--surface);
  transition:background .18s;
}
.layer:last-child{ border-bottom:0; }
.layer:hover{ background:var(--surface-2); }
.layer .ix{ font-family:var(--mono); font-size:11.5px; color:var(--accent); letter-spacing:.1em; }
.layer h3{ font-size:20px; font-variation-settings:"wdth" 106,"wght" 700; }
.layer p{ color:var(--ink-2); font-size:15px; line-height:1.55; }

/* ---- our solutions: the connection diagram the copy describes ---- */
.sol{
  margin-top:48px; border:1px solid var(--line);
  border-radius:12px; background:var(--surface); overflow:hidden;
}
.sol-head{ padding:30px clamp(20px,4vw,38px); border-bottom:1px solid var(--line-soft); }
.sol-head h3{ font-size:clamp(24px,3vw,34px); }
.sol-head .kick{ color:var(--accent); font-size:16px; margin-top:10px; font-weight:500; }
.sol-head p{ color:var(--ink-2); margin-top:14px; max-width:70ch; font-size:16px; }

/* five columns so the connectors genuinely run left-to-right between
   the merchant, the hub and the providers */
.wire{
  display:grid;
  grid-template-columns:
    minmax(0,.9fr) clamp(18px,4vw,54px) minmax(0,1fr) clamp(18px,4vw,54px) minmax(0,1fr);
  padding:34px clamp(20px,4vw,38px) 36px;
  align-items:center;
}
.wire-col{ display:flex; flex-direction:column; gap:10px; }
.chipnode{
  border:1px solid var(--line); border-radius:6px; background:var(--ground);
  padding:11px 14px; font-family:var(--mono); font-size:12px;
  color:var(--ink-2); text-align:center; letter-spacing:.04em;
}
.hub{
  border-radius:10px; padding:22px 18px; text-align:center;
  background:linear-gradient(var(--surface),var(--surface)) padding-box,
             var(--grad) border-box;
  border:1px solid transparent;
}
.hub .h{
  font-family:var(--display);
  font-variation-settings:"wdth" 108,"wght" 700;
  font-size:19px; letter-spacing:-.02em;
}
.hub .s{
  font-family:var(--mono); font-size:10.5px; color:var(--ink-3);
  letter-spacing:.12em; text-transform:uppercase; margin-top:8px;
}
.rail{ position:relative; height:1px; }
.rail::before{
  content:""; position:absolute; left:0; right:0; top:0; height:1px;
  background:linear-gradient(90deg,var(--line),var(--accent));
}
.rail:last-of-type::before{ background:linear-gradient(90deg,var(--accent),var(--line)); }
.sol-cta{ padding:0 clamp(20px,4vw,38px) 34px; }

/* ---- approach: a genuine sequence, so genuinely numbered ---- */
.flow{
  display:grid; grid-template-columns:repeat(4,1fr); gap:1px;
  margin-top:48px; padding:0; list-style:none;
  background:var(--line-soft);
  border:1px solid var(--line-soft);
  border-radius:10px; overflow:hidden;
}
.step{
  background:var(--surface); padding:28px 24px 30px;
  display:flex; flex-direction:column;
}
.step .num{ font-family:var(--mono); font-size:11px; color:var(--accent); letter-spacing:.14em; }
.step h3{ font-size:19px; font-variation-settings:"wdth" 108,"wght" 700; margin-top:16px; }
.step p{ color:var(--ink-2); font-size:14.5px; margin-top:10px; margin-bottom:18px; line-height:1.55; }
.step .t{
  font-family:var(--mono); font-size:11px; color:var(--ink-3);
  margin-top:auto; padding-top:14px;
  border-top:1px solid var(--line-soft); letter-spacing:.04em;
}

/* ---- definition list grid (our role / company) ---- */
.sec-grid{
  display:grid; grid-template-columns:repeat(2,minmax(0,1fr));
  gap:0 clamp(32px,5vw,64px); margin-top:44px;
}
.sec-item{
  display:flex; gap:14px; padding:18px 0;
  border-bottom:1px solid var(--line-soft); align-items:flex-start;
}
.sec-item svg{ width:18px; height:18px; color:var(--accent); flex:none; margin-top:3px; }
.sec-item strong{ font-weight:600; font-size:15.5px; display:block; }
.sec-item span{ color:var(--ink-2); font-size:14.5px; }

/* ---- faq ---- */
.faq{ margin-top:44px; border-top:1px solid var(--line-soft); }
details{ border-bottom:1px solid var(--line-soft); }
summary{
  cursor:pointer; list-style:none; position:relative;
  padding:20px 40px 20px 0;
  font-family:var(--display);
  font-variation-settings:"wdth" 104,"wght" 600;
  font-size:17.5px; letter-spacing:-.01em;
}
summary::-webkit-details-marker{ display:none; }
summary::after{
  content:"+"; position:absolute; right:4px; top:19px;
  font-family:var(--mono); font-size:19px; color:var(--accent);
  transition:transform .2s;
}
details[open] summary::after{ transform:rotate(45deg); }
details > p{ color:var(--ink-2); font-size:15.5px; padding:0 40px 24px 0; max-width:74ch; }

/* ---- closing cta ---- */
.close-cta{
  border:1px solid var(--line); border-radius:12px;
  background:linear-gradient(160deg,var(--surface-2),var(--surface));
  padding:clamp(40px,6vw,72px) clamp(28px,5vw,64px);
  display:flex; flex-wrap:wrap; gap:32px;
  align-items:center; justify-content:space-between;
}
.close-cta h2{ font-size:clamp(28px,3.6vw,42px); max-width:16ch; }
.close-cta p{ color:var(--ink-2); margin-top:14px; max-width:44ch; }

/* ============================ FOOTER ============================ */
footer{
  border-top:1px solid var(--line-soft);
  background:var(--ground-2);
  padding:56px 0 38px;
}
.foot-grid{ display:grid; grid-template-columns:1.5fr repeat(4,1fr); gap:32px; }
.foot-grid h4{
  font-family:var(--mono); font-size:10.5px;
  letter-spacing:.15em; text-transform:uppercase; color:var(--ink-3);
  font-weight:500; font-variation-settings:normal; margin:0 0 15px;
}
.foot-grid ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:10px; }
.foot-grid a{ color:var(--ink-2); text-decoration:none; font-size:14.5px; }
.foot-grid a:hover{ color:var(--ink); }
.foot-blurb{ color:var(--ink-2); font-size:14.5px; margin-top:16px; max-width:32ch; }
.tagline{
  font-family:var(--mono); font-size:10.5px; letter-spacing:.14em;
  text-transform:uppercase; color:var(--ink-3); margin-top:12px;
}
.foot-bottom{
  margin-top:44px; padding-top:22px; border-top:1px solid var(--line-soft);
  display:flex; flex-wrap:wrap; gap:14px; justify-content:space-between;
  font-family:var(--mono); font-size:11.5px; color:var(--ink-3); letter-spacing:.03em;
}

/* ============================================================
   LEGAL DOCUMENT PAGES
   ============================================================ */
.legal{ padding:clamp(48px,7vw,84px) 0 clamp(56px,8vw,96px); }
.legal-wrap{ max-width:760px; margin-inline:auto; padding-inline:var(--pad); }
.legal h1{ font-size:clamp(32px,4.4vw,50px); margin-top:18px; }

.legal-meta{
  display:grid; grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1px; margin-top:36px;
  background:var(--line-soft); border:1px solid var(--line-soft);
  border-radius:10px; overflow:hidden;
}
.legal-meta div{ background:var(--surface); padding:16px 18px; }
.legal-meta div.wide{ grid-column:1 / -1; }
.legal-meta dt{
  font-family:var(--mono); font-size:10.5px; letter-spacing:.13em;
  text-transform:uppercase; color:var(--ink-3); margin:0;
}
.legal-meta dd{ margin:7px 0 0; font-size:15px; color:var(--ink); }

/* neutral factual note — states what is actually true of the live site */
.notice{
  margin-top:32px;
  border:1px solid var(--line); background:var(--surface);
  border-radius:10px; padding:20px 22px;
}
.notice > strong{
  display:block; color:var(--accent);
  font-family:var(--mono); font-size:11.5px;
  letter-spacing:.12em; text-transform:uppercase; margin-bottom:10px;
}
.notice p{ color:var(--ink-2); font-size:14.5px; line-height:1.6; }
.notice p + p{ margin-top:10px; }

.legal-body{ margin-top:44px; }
.legal-body h2{
  font-size:clamp(20px,2.3vw,25px);
  font-variation-settings:"wdth" 108,"wght" 700;
  margin-top:44px; padding-top:24px; border-top:1px solid var(--line-soft);
}
.legal-body h2:first-child{ margin-top:0; padding-top:0; border-top:0; }
.legal-body p{ color:var(--ink-2); font-size:16.5px; margin-top:16px; }
.legal-body ul{
  margin:16px 0 0; padding:0; list-style:none;
  display:flex; flex-direction:column; gap:11px;
}
.legal-body li{
  display:flex; gap:11px; align-items:flex-start;
  color:var(--ink-2); font-size:16px;
}
.legal-body li::before{
  content:""; width:5px; height:5px; border-radius:50%;
  background:var(--violet); margin-top:9px; flex:none;
}
.legal-body a{ color:var(--accent); }

.legal-toc{
  margin-top:36px; padding:22px 24px;
  border:1px solid var(--line); border-radius:10px; background:var(--surface);
}
.legal-toc h2{
  font-family:var(--mono); font-size:10.5px; letter-spacing:.13em;
  text-transform:uppercase; color:var(--ink-3);
  font-variation-settings:normal; font-weight:500;
  margin:0 0 14px; padding:0; border:0;
}
.legal-toc ol{
  margin:0; padding:0; list-style:none; counter-reset:toc;
  columns:2; column-gap:30px;
}
.legal-toc li{ counter-increment:toc; margin-bottom:9px; break-inside:avoid; }
.legal-toc a{
  color:var(--ink-2); text-decoration:none; font-size:14.5px;
  display:flex; gap:10px;
}
.legal-toc a::before{
  content:counter(toc,decimal-leading-zero);
  font-family:var(--mono); font-size:11.5px; color:var(--ink-3); flex:none;
}
.legal-toc a:hover{ color:var(--ink); }

/* ============================ RESPONSIVE ============================ */
@media (max-width:1040px){
  .foot-grid{ grid-template-columns:1fr 1fr 1fr; }
  .flow{ grid-template-columns:1fr 1fr; }
}
@media (max-width:900px){
  .hero-grid{ grid-template-columns:1fr; }
  .layer{ grid-template-columns:44px 1fr; gap:6px 14px; }
  .layer p{ grid-column:2; }
  /* stacked: the connectors turn vertical so the flow still reads */
  .wire{ grid-template-columns:1fr; gap:14px; justify-items:stretch; }
  .rail{ height:26px; justify-self:center; width:1px; }
  .rail::before{
    left:0; right:auto; top:0; width:1px; height:100%;
    background:linear-gradient(180deg,var(--line),var(--accent));
  }
  .rail:last-of-type::before{ background:linear-gradient(180deg,var(--accent),var(--line)); }
  .nav-links{ display:none; }
}
@media (max-width:640px){
  .flow,.sec-grid{ grid-template-columns:1fr; }
  .foot-grid{ grid-template-columns:1fr 1fr; }
  .legal-meta{ grid-template-columns:1fr; }
  .legal-toc ol{ columns:1; }
  body{ background-size:40px 40px; }
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
}