/* ==========================================================================
   DynamicSoft Solutions — Design System
   Signature motif: the "clearance chain" — a line of linked nodes that light
   up in sequence, echoing the ZATCA Previous-Invoice-Hash chain at the heart
   of the product. Used sparingly: hero, section dividers, ZATCA timeline.
   ========================================================================== */

:root{
  /* ---- Color: derived from the DynamicSoft mark (#0098DA / #727579) ---- */
  --ink:        #0B1F2E;   /* deep navy-black — dark sections */
  --ink-soft:   #142B3D;
  --paper:      #F6F8FA;   /* light background */
  --white:      #FFFFFF;
  --blue:       #0098DA;   /* brand blue */
  --blue-dark:  #0072A8;
  --blue-pale:  #E4F4FC;
  --gray:       #727579;   /* brand gray */
  --gray-line:  #DEE2E6;
  --gray-soft:  #6B7684;
  --teal:       #17C3A3;   /* "cleared" success accent */
  --amber:      #F2A93B;   /* pitfall / warning accent */
  --text:       #16232C;
  --text-mute:  #5B6672;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'IBM Plex Sans', sans-serif;
  --font-mono:    'IBM Plex Mono', monospace;

  --container: 1180px;
  --radius: 10px;
  --radius-sm: 6px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--text);
  background:var(--paper);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ font-family:var(--font-display); font-weight:600; margin:0 0 .5em; letter-spacing:-0.01em; }
p{ margin:0 0 1em; }
.mono{ font-family:var(--font-mono); }

.container{ max-width:var(--container); margin:0 auto; padding:0 28px; }
.section{ padding:96px 0; }
.section-tight{ padding:64px 0; }
.section-alt{ background:var(--white); }
.section-ink{ background:var(--ink); color:#DCE6EC; }
.section-ink h2, .section-ink h3{ color:var(--white); }
.section-ink .text-mute{ color:#93A4B2; }

.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-mono); font-size:12.5px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--blue-dark); margin-bottom:14px;
}
.section-ink .eyebrow{ color:var(--teal); }
.eyebrow::before{ content:""; width:16px; height:1.5px; background:currentColor; display:inline-block; }

h1{ font-size:clamp(36px,5vw,58px); line-height:1.05; }
h2{ font-size:clamp(28px,3.4vw,40px); line-height:1.12; }
h3{ font-size:22px; }
.lede{ font-size:19px; color:var(--text-mute); max-width:640px; }
.section-ink .lede{ color:#B7C4CE; }

/* ---------------------------------- Buttons ---------------------------- */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:13px 24px; border-radius:999px; font-weight:600; font-size:15px;
  border:1.5px solid transparent; cursor:pointer; transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
  white-space:nowrap;
}
.btn:hover{ transform:translateY(-1px); }
.btn-primary{ background:var(--blue); color:#fff; box-shadow:0 6px 20px -8px rgba(0,152,218,.6); }
.btn-primary:hover{ background:var(--blue-dark); }
.btn-ghost{ background:transparent; border-color:var(--gray-line); color:var(--text); }
.btn-ghost:hover{ border-color:var(--blue); color:var(--blue-dark); }
.btn-ghost-light{ background:transparent; border-color:rgba(255,255,255,.28); color:#fff; }
.btn-ghost-light:hover{ border-color:var(--teal); color:var(--teal); }
.btn-row{ display:flex; gap:14px; flex-wrap:wrap; }

/* ---------------------------------- Header ------------------------------ */
.site-header{
  position:sticky; top:0; z-index:100;
  background:rgba(246,248,250,.86); backdrop-filter:blur(10px);
  border-bottom:1px solid var(--gray-line);
}
.nav{ display:flex; align-items:center; justify-content:space-between; height:76px; }
.brand{ display:flex; align-items:center; gap:10px; }
.brand img{ height:38px; width:auto; }
.nav-links{ display:flex; align-items:center; gap:2px; }
.nav-links > li{ position:relative; }
.nav-links > li > a, .nav-links > li > button.nav-top{
  display:flex; align-items:center; gap:6px;
  font-family:var(--font-body); font-weight:500; font-size:15px;
  padding:10px 14px; border-radius:8px; color:var(--text);
  background:none; border:none; cursor:pointer; font-size:15px;
}
.nav-links > li > a:hover, .nav-links > li > button.nav-top:hover{ color:var(--blue-dark); }
.caret{ width:9px; height:9px; border-right:1.6px solid currentColor; border-bottom:1.6px solid currentColor; transform:rotate(45deg); margin-top:-3px; opacity:.7; }
.dropdown{
  position:absolute; top:calc(100% + 6px); left:0; min-width:260px;
  background:var(--white); border:1px solid var(--gray-line); border-radius:12px;
  box-shadow:0 20px 40px -16px rgba(11,31,46,.22);
  padding:10px; opacity:0; visibility:hidden; transform:translateY(6px);
  transition:opacity .16s ease, transform .16s ease, visibility .16s;
}
.nav-links > li:hover .dropdown, .nav-links > li.open .dropdown{ opacity:1; visibility:visible; transform:translateY(0); }
.dropdown a{ display:block; padding:10px 12px; border-radius:8px; font-size:14.5px; }
.dropdown a:hover{ background:var(--blue-pale); color:var(--blue-dark); }
.dropdown .dd-desc{ display:block; font-size:12.5px; color:var(--text-mute); margin-top:1px; }
.dropdown-wide{ min-width:460px; column-count:2; column-gap:4px; }
.dropdown-wide a{ break-inside:avoid; }
.dropdown-foot{ grid-column:1/-1; border-top:1px solid var(--gray-line); margin-top:6px; padding-top:8px; }
.dropdown-foot a{ font-weight:600; color:var(--blue-dark); }
@media (max-width:980px){ .dropdown-wide{ column-count:1; min-width:0; } }
.nav-cta{ display:flex; align-items:center; gap:10px; }
.nav-toggle{ display:none; background:none; border:none; cursor:pointer; }

@media (max-width: 980px){
  .nav-links{ display:none; }
  .nav-toggle{ display:block; }
  .nav-cta .btn-ghost{ display:none; }
}

/* ---------------------------------- Hero -------------------------------- */
.hero{ padding:76px 0 60px; overflow:hidden; }
.hero-grid{ display:grid; grid-template-columns:1.05fr .95fr; gap:56px; align-items:center; }
@media (max-width:980px){ .hero-grid{ grid-template-columns:1fr; } }

/* Clearance chain — signature element */
.chain-wrap{
  position:relative; background:var(--ink); border-radius:20px; padding:38px 28px;
  box-shadow:0 30px 60px -24px rgba(11,31,46,.45);
}
.chain-endpoints{ display:flex; align-items:center; justify-content:space-between; margin-bottom:26px; }
.chain-endpoint{ display:flex; flex-direction:column; align-items:center; gap:8px; width:84px; }
.chain-endpoint .badge{
  width:52px; height:52px; border-radius:14px; display:flex; align-items:center; justify-content:center;
  background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.12);
  font-family:var(--font-mono); font-size:11px; color:#B7C4CE;
}
.chain-endpoint span.lbl{ font-size:11.5px; color:#93A4B2; text-align:center; }

.chain{ position:relative; height:64px; margin:8px 4px 30px; }
.chain-line{
  position:absolute; top:50%; left:0; right:0; height:2px; transform:translateY(-50%);
  background:linear-gradient(90deg, rgba(255,255,255,.10), rgba(255,255,255,.10));
  border-radius:2px; overflow:hidden;
}
.chain-line-fill{ position:absolute; inset:0; width:0%; background:linear-gradient(90deg, var(--blue), var(--teal)); transition:width 1.1s ease; }
.chain-nodes{ position:absolute; inset:0; display:flex; align-items:center; justify-content:space-between; }
.chain-node{
  width:14px; height:14px; border-radius:50%; background:var(--ink-soft);
  border:2px solid rgba(255,255,255,.28); position:relative; transition:all .35s ease;
  box-shadow:0 0 0 0 rgba(23,195,163,0);
}
.chain-node.lit{ background:var(--teal); border-color:var(--teal); box-shadow:0 0 0 6px rgba(23,195,163,.16); }
.chain-node em{
  position:absolute; top:20px; left:50%; transform:translateX(-50%); font-style:normal;
  font-family:var(--font-mono); font-size:10.5px; color:#7C8B98; white-space:nowrap;
}
.chain-node.lit em{ color:var(--teal); }
.chain-caption{ font-family:var(--font-mono); font-size:12px; color:#7C8B98; text-align:center; }
.chain-caption b{ color:#DCE6EC; font-weight:500; }

/* ---------------------------------- Marquee trust bar -------------------- */
.trust{ border-top:1px solid var(--gray-line); border-bottom:1px solid var(--gray-line); background:var(--white); padding:18px 0; overflow:hidden; }
.trust-track{ display:flex; gap:56px; width:max-content; animation:scroll-left 28s linear infinite; align-items:center; }
.trust-track span{ font-family:var(--font-mono); font-size:13px; color:var(--gray-soft); white-space:nowrap; letter-spacing:.02em; }
.trust-track span b{ color:var(--text); font-weight:600; }
@keyframes scroll-left{ from{ transform:translateX(0);} to{ transform:translateX(-50%);} }

/* ---------------------------------- Stat band ---------------------------- */
.stat-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--gray-line); border:1px solid var(--gray-line); border-radius:16px; overflow:hidden; }
.stat{ background:var(--white); padding:34px 24px; text-align:center; }
.stat-number{ font-family:var(--font-display); font-size:38px; font-weight:600; color:var(--blue-dark); }
.stat-label{ font-size:13.5px; color:var(--text-mute); margin-top:6px; }
@media (max-width:760px){ .stat-grid{ grid-template-columns:1fr 1fr; } }

/* ---------------------------------- Cards -------------------------------- */
.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.grid-2{ display:grid; grid-template-columns:repeat(2,1fr); gap:22px; }
.grid-4{ display:grid; grid-template-columns:repeat(4,1fr); gap:18px; }
@media (max-width:900px){ .grid-3,.grid-2,.grid-4{ grid-template-columns:1fr 1fr; } }
@media (max-width:600px){ .grid-3,.grid-2,.grid-4{ grid-template-columns:1fr; } }

.card{
  background:var(--white); border:1px solid var(--gray-line); border-radius:14px; padding:28px;
  transition:border-color .18s ease, transform .18s ease, box-shadow .18s ease;
}
.card:hover{ border-color:var(--blue); transform:translateY(-3px); box-shadow:0 20px 40px -24px rgba(11,31,46,.25); }
.card .tag{ font-family:var(--font-mono); font-size:11.5px; letter-spacing:.08em; text-transform:uppercase; color:var(--blue-dark); }
.card h3{ margin-top:8px; }
.card p{ color:var(--text-mute); font-size:14.5px; margin-bottom:0;}
.card-link{ display:inline-flex; align-items:center; gap:6px; margin-top:16px; font-weight:600; font-size:14px; color:var(--blue-dark); }
.card-link .arrow{ transition:transform .15s ease; }
.card:hover .card-link .arrow{ transform:translateX(3px); }

.card.card-featured{ border-color:var(--blue); background:linear-gradient(180deg,var(--blue-pale),var(--white) 60%); }
.card.card-featured .tag{ color:var(--blue-dark); }

/* pill list */
.pill-grid{ display:flex; flex-wrap:wrap; gap:10px; }
.pill{
  display:flex; align-items:center; gap:8px; padding:10px 16px; border-radius:999px;
  background:var(--white); border:1px solid var(--gray-line); font-size:14px;
}
.pill .flag{ font-size:16px; }

/* ---------------------------------- Table -------------------------------- */
.table-wrap{ overflow-x:auto; border:1px solid var(--gray-line); border-radius:14px; background:var(--white); }
table.cmp{ border-collapse:collapse; width:100%; min-width:760px; }
table.cmp th, table.cmp td{ text-align:left; padding:16px 20px; vertical-align:top; font-size:14.5px; border-bottom:1px solid var(--gray-line); }
table.cmp th{ font-family:var(--font-mono); font-size:12px; letter-spacing:.06em; text-transform:uppercase; color:var(--text-mute); background:var(--paper); }
table.cmp tr:last-child td{ border-bottom:none; }
table.cmp td:first-child, table.cmp th:first-child{ font-weight:600; color:var(--text); white-space:nowrap; }
table.cmp td.recommended{ background:var(--blue-pale); }

/* ---------------------------------- Timeline / process ------------------- */
.rail{ position:relative; padding-left:42px; }
.rail::before{ content:""; position:absolute; left:14px; top:6px; bottom:6px; width:2px; background:var(--gray-line); }
.rail-item{ position:relative; padding-bottom:38px; }
.rail-item:last-child{ padding-bottom:0; }
.rail-dot{
  position:absolute; left:-42px; top:2px; width:30px; height:30px; border-radius:50%;
  background:var(--white); border:2px solid var(--blue); color:var(--blue-dark);
  display:flex; align-items:center; justify-content:center; font-family:var(--font-mono); font-size:12px; font-weight:600;
}
.rail-item.done .rail-dot{ background:var(--teal); border-color:var(--teal); color:#fff; }
.rail-body{ background:var(--white); border:1px solid var(--gray-line); border-radius:12px; padding:18px 22px; }
.rail-body h4{ margin-bottom:4px; font-size:17px; }
.pitfall{
  margin-top:12px; padding:11px 14px; border-radius:8px; background:#FFF6E9; border:1px solid #F3D9A2;
  font-size:13.5px; color:#7A5209; display:flex; gap:8px;
}
.pitfall b{ color:#8A5A00; }

/* ---------------------------------- Callout / quote ----------------------- */
.callout{ border-left:3px solid var(--blue); background:var(--blue-pale); padding:18px 22px; border-radius:0 10px 10px 0; font-size:15px; }
.pull-quote{ font-family:var(--font-display); font-size:24px; line-height:1.4; color:var(--white); }
.pull-quote span{ color:var(--teal); }

/* ---------------------------------- Diagram boxes -------------------------- */
.flow{ display:flex; align-items:center; gap:0; flex-wrap:wrap; justify-content:center; }
.flow-node{
  background:var(--white); border:1.5px solid var(--gray-line); border-radius:12px; padding:16px 18px;
  min-width:150px; text-align:center; font-size:13.5px; font-weight:600;
}
.flow-node small{ display:block; font-weight:400; color:var(--text-mute); margin-top:4px; font-size:12px; }
.flow-node.accent{ border-color:var(--blue); background:var(--blue-pale); }
.flow-arrow{ padding:0 10px; color:var(--gray-soft); font-size:18px; }
@media (max-width:760px){ .flow{ flex-direction:column; } .flow-arrow{ transform:rotate(90deg); } }

/* ---------------------------------- Forms -------------------------------- */
.form-grid{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.field{ display:flex; flex-direction:column; gap:6px; }
.field.full{ grid-column:1/-1; }
.field label{ font-size:13px; font-weight:600; color:var(--text-mute); }
.field input, .field select, .field textarea{
  font-family:var(--font-body); font-size:15px; padding:12px 14px; border-radius:8px;
  border:1.5px solid var(--gray-line); background:var(--white); color:var(--text);
}
.field input:focus, .field select:focus, .field textarea:focus{ outline:2px solid var(--blue); outline-offset:1px; border-color:var(--blue); }
@media (max-width:700px){ .form-grid{ grid-template-columns:1fr; } }

/* ---------------------------------- Footer -------------------------------- */
.site-footer{ background:var(--ink); color:#B7C4CE; padding:64px 0 28px; }
.footer-grid{ display:grid; grid-template-columns:1.4fr repeat(4,1fr); gap:32px; }
.footer-grid h4{ color:#fff; font-size:13px; letter-spacing:.04em; text-transform:uppercase; font-family:var(--font-mono); margin-bottom:14px; }
.footer-grid a{ display:block; padding:5px 0; font-size:14px; color:#9FB0BC; }
.footer-grid a:hover{ color:var(--teal); }
.footer-bottom{ margin-top:48px; padding-top:24px; border-top:1px solid rgba(255,255,255,.1); display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; font-size:13px; color:#7C8B98; }
@media (max-width:900px){ .footer-grid{ grid-template-columns:1fr 1fr; } }

/* ---------------------------------- Reveal on scroll ----------------------- */
.reveal{ opacity:0; transform:translateY(18px); transition:opacity .6s ease, transform .6s ease; }
.reveal.in{ opacity:1; transform:translateY(0); }
.reveal-stagger > *{ opacity:0; transform:translateY(18px); transition:opacity .6s ease, transform .6s ease; }
.reveal-stagger.in > *{ opacity:1; transform:translateY(0); }
.reveal-stagger.in > *:nth-child(1){ transition-delay:.02s; }
.reveal-stagger.in > *:nth-child(2){ transition-delay:.08s; }
.reveal-stagger.in > *:nth-child(3){ transition-delay:.14s; }
.reveal-stagger.in > *:nth-child(4){ transition-delay:.2s; }
.reveal-stagger.in > *:nth-child(5){ transition-delay:.26s; }
.reveal-stagger.in > *:nth-child(6){ transition-delay:.32s; }
.reveal-stagger.in > *:nth-child(7){ transition-delay:.38s; }

@media (prefers-reduced-motion: reduce){
  .reveal, .reveal-stagger > *{ opacity:1 !important; transform:none !important; transition:none !important; }
  .trust-track{ animation:none; }
  .chain-line-fill{ transition:none; }
}

/* ---------------------------------- Page header (inner pages) -------------- */
.page-hero{ padding:64px 0 48px; border-bottom:1px solid var(--gray-line); }
.breadcrumb{ font-family:var(--font-mono); font-size:12.5px; color:var(--gray-soft); margin-bottom:18px; }
.breadcrumb a:hover{ color:var(--blue-dark); }

.two-col{ display:grid; grid-template-columns:2fr 1fr; gap:48px; }
@media (max-width:900px){ .two-col{ grid-template-columns:1fr; } }
.side-card{ background:var(--white); border:1px solid var(--gray-line); border-radius:14px; padding:22px; position:sticky; top:96px; }
.side-card h4{ font-size:14px; }
.side-card ul li{ padding:6px 0; font-size:14px; border-bottom:1px dashed var(--gray-line); }
.side-card ul li:last-child{ border-bottom:none; }

.divider-chain{ display:flex; align-items:center; gap:8px; justify-content:center; padding:8px 0; opacity:.5; }
.divider-chain i{ width:6px; height:6px; border-radius:50%; background:var(--blue); }