/* ==========================================================================
   QB Upgrade Hub — Design tokens
   Display: Space Grotesk / Body: Inter / Data-mono: IBM Plex Mono
   ========================================================================== */
:root{
  --bg:            #080B10;
  --bg-alt:        #0D131C;
  --bg-elevated:   #121A26;
  --card:          #131B27;
  --card-border:   rgba(255,255,255,.08);
  --border:        rgba(255,255,255,.10);

  --text:          #F3F6FA;
  --text-soft:     #C4CDD9;
  --text-muted:    #8B96A5;

  --blue:          #2F6FED;
  --blue-soft:     #4C8BFF;
  --cyan:          #22D3EE;
  --grad:          linear-gradient(120deg, var(--blue) 0%, var(--cyan) 100%);

  --success:       #34D399;

  --radius-sm:     8px;
  --radius:        14px;
  --radius-lg:     22px;

  --shadow-card:   0 1px 0 rgba(255,255,255,.04) inset, 0 20px 40px -24px rgba(0,0,0,.6);
  --shadow-glow:   0 0 0 1px rgba(47,111,237,.25), 0 20px 60px -20px rgba(47,111,237,.35);

  --font-display:  'Space Grotesk', 'Inter', sans-serif;
  --font-body:     'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:     'IBM Plex Mono', 'SFMono-Regular', monospace;

  --container:     1200px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:0.01ms !important; animation-iteration-count:1 !important; transition-duration:0.01ms !important; scroll-behavior:auto !important; }
}

body{
  margin:0;
  background:var(--bg);
  color:var(--text-soft);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  color:var(--text);
  line-height:1.15;
  margin:0 0 .5em;
  letter-spacing:-0.01em;
}
h1{ font-size:clamp(2.1rem, 4.2vw, 3.4rem); font-weight:700; }
h2{ font-size:clamp(1.6rem, 2.8vw, 2.3rem); font-weight:700; }
h3{ font-size:1.2rem; font-weight:600; }
p{ margin:0 0 1em; }
a{ color:var(--blue-soft); text-decoration:none; }
img{ max-width:100%; display:block; }
ul{ margin:0; padding:0; list-style:none; }

.container{ max-width:var(--container); margin:0 auto; padding:0 24px; }

.skip-link{
  position:absolute; left:-999px; top:0; background:var(--blue); color:#fff;
  padding:10px 16px; z-index:200; border-radius:0 0 8px 0;
}
.skip-link:focus{ left:0; }

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

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-body); font-weight:600; font-size:.95rem;
  padding:13px 24px; border-radius:10px; border:1px solid transparent;
  cursor:pointer; transition:transform .15s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{ background:var(--grad); color:#04101F; box-shadow:0 10px 30px -12px rgba(47,111,237,.55); }
.btn-primary:hover{ transform:translateY(-1px); box-shadow:0 14px 34px -12px rgba(47,111,237,.7); }
.btn-outline{ background:transparent; color:var(--text); border-color:var(--border); }
.btn-outline:hover{ border-color:var(--blue-soft); color:var(--blue-soft); }
.btn-sm{ padding:10px 18px; font-size:.85rem; }

/* ---------- Header ---------- */
.site-header{
  position:sticky; top:0; z-index:100;
  background:rgba(8,11,16,.82); backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
}
.header-inner{ display:flex; align-items:center; justify-content:space-between; height:76px; gap:24px; }
.brand{ display:flex; align-items:center; gap:10px; }
.brand-name{ font-family:var(--font-display); font-weight:700; font-size:1.08rem; color:var(--text); }

.main-nav ul{ display:flex; align-items:center; gap:4px; }
.nav-link{
  font-family:var(--font-body); font-size:.93rem; font-weight:500; color:var(--text-soft);
  background:none; border:none; cursor:pointer; padding:10px 14px; border-radius:8px;
  display:inline-flex; align-items:center; gap:6px; transition:color .15s, background .15s;
}
.nav-link:hover, .nav-link.active{ color:var(--text); background:rgba(255,255,255,.05); }

.has-dropdown{ position:relative; }
.dropdown-menu{
  position:absolute; top:calc(100% + 8px); left:0; min-width:230px;
  background:var(--bg-elevated); border:1px solid var(--card-border); border-radius:var(--radius-sm);
  padding:8px; box-shadow:var(--shadow-card);
  opacity:0; visibility:hidden; transform:translateY(6px);
  transition:opacity .18s ease, transform .18s ease, visibility .18s;
}
.has-dropdown:hover .dropdown-menu,
.has-dropdown:focus-within .dropdown-menu{ opacity:1; visibility:visible; transform:translateY(0); }
.dropdown-menu li a{ display:block; padding:9px 12px; border-radius:6px; color:var(--text-soft); font-size:.9rem; }
.dropdown-menu li a:hover, .dropdown-menu li a.active{ background:rgba(47,111,237,.12); color:var(--blue-soft); }

.header-actions{ display:flex; align-items:center; gap:14px; }
.hamburger{ display:none; flex-direction:column; gap:5px; background:none; border:none; cursor:pointer; padding:6px; }
.hamburger span{ width:22px; height:2px; background:var(--text); border-radius:2px; transition:transform .2s, opacity .2s; }
.mobile-nav{ display:none; }

/* ---------- Hero ---------- */
.hero{
  position:relative; overflow:hidden;
  padding:96px 0 88px;
  background:
    radial-gradient(60% 55% at 82% 10%, rgba(47,111,237,.20) 0%, transparent 60%),
    radial-gradient(45% 45% at 8% 90%, rgba(34,211,238,.10) 0%, transparent 60%),
    var(--bg);
  border-bottom:1px solid var(--border);
}
.hero-inner{ display:grid; grid-template-columns:1.05fr .95fr; gap:56px; align-items:center; }
.eyebrow{
  display:inline-flex; align-items:center; gap:8px; font-family:var(--font-mono); font-size:.78rem;
  letter-spacing:.06em; text-transform:uppercase; color:var(--cyan);
  background:rgba(34,211,238,.08); border:1px solid rgba(34,211,238,.25);
  padding:6px 12px; border-radius:999px; margin-bottom:22px;
}
.hero h1{ margin-bottom:20px; }
.hero-lead{ font-size:1.1rem; color:var(--text-soft); max-width:52ch; margin-bottom:32px; }
.hero-actions{ display:flex; flex-wrap:wrap; gap:14px; }
.hero-visual{ position:relative; }

/* ---------- Sections ---------- */
.section{ padding:88px 0; }
.section-alt{ background:var(--bg-alt); border-top:1px solid var(--border); border-bottom:1px solid var(--border); }
.section-head{ max-width:680px; margin-bottom:48px; }
.section-head.center{ margin-left:auto; margin-right:auto; text-align:center; }
.kicker{
  font-family:var(--font-mono); font-size:.78rem; letter-spacing:.08em; text-transform:uppercase;
  color:var(--blue-soft); margin-bottom:12px; display:block;
}

/* ---------- Cards / Grids ---------- */
.grid{ display:grid; gap:24px; }
.grid-2{ grid-template-columns:repeat(2, 1fr); }
.grid-3{ grid-template-columns:repeat(3, 1fr); }
.grid-4{ grid-template-columns:repeat(4, 1fr); }

.card{
  background:var(--card); border:1px solid var(--card-border); border-radius:var(--radius);
  padding:30px; box-shadow:var(--shadow-card);
  transition:transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.card:hover{ transform:translateY(-3px); border-color:rgba(47,111,237,.35); box-shadow:var(--shadow-glow); }
.card-icon{
  width:44px; height:44px; border-radius:11px; display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg, rgba(47,111,237,.18), rgba(34,211,238,.14));
  border:1px solid rgba(47,111,237,.3); margin-bottom:18px; color:var(--cyan);
}
.card h3{ margin-bottom:10px; }
.card p{ color:var(--text-muted); font-size:.95rem; margin-bottom:16px; }
.card ul{ margin-bottom:16px; }
.card ul li{
  font-size:.9rem; color:var(--text-soft); padding-left:20px; position:relative; margin-bottom:8px;
}
.card ul li::before{
  content:""; position:absolute; left:0; top:.55em; width:8px; height:8px; border-radius:2px;
  background:var(--grad);
}
.card-link{ font-size:.9rem; font-weight:600; color:var(--blue-soft); display:inline-flex; gap:6px; }

/* ---------- Process / Steps ---------- */
.process-grid{ grid-template-columns:repeat(4,1fr); counter-reset:step; }
.process-step{ position:relative; padding-top:8px; border-top:2px solid var(--border); }
.process-step .num{ font-family:var(--font-mono); color:var(--cyan); font-size:.85rem; display:block; margin-bottom:14px; }

/* ---------- Flow visual ---------- */
.flow{ display:flex; flex-wrap:wrap; align-items:center; justify-content:center; gap:0; margin-top:20px; }
.flow-node{
  background:var(--card); border:1px solid var(--card-border); border-radius:12px;
  padding:14px 20px; font-family:var(--font-mono); font-size:.85rem; color:var(--text);
  white-space:nowrap;
}
.flow-arrow{ color:var(--blue-soft); padding:0 14px; font-size:1.1rem; }

/* ---------- Table-ish / stat rows ---------- */
.mono{ font-family:var(--font-mono); }

/* ---------- Forms ---------- */
.form-grid{ display:grid; grid-template-columns:1fr 1fr; gap:20px; }
.field{ display:flex; flex-direction:column; gap:8px; margin-bottom:20px; }
.field.full{ grid-column:1 / -1; }
label{ font-size:.88rem; font-weight:600; color:var(--text); }
input[type=text], input[type=email], input[type=tel], select, textarea{
  background:var(--bg-elevated); border:1px solid var(--card-border); color:var(--text);
  padding:13px 14px; border-radius:9px; font-family:var(--font-body); font-size:.95rem;
  transition:border-color .15s;
}
input:focus, select:focus, textarea:focus{ border-color:var(--blue-soft); }
textarea{ resize:vertical; min-height:130px; }
.checkbox-row{ display:flex; align-items:flex-start; gap:10px; margin-bottom:24px; }
.checkbox-row input{ margin-top:4px; }
.checkbox-row label{ font-weight:400; color:var(--text-soft); font-size:.9rem; }
.honeypot{ position:absolute; left:-9999px; width:1px; height:1px; overflow:hidden; }
.form-note{ font-size:.85rem; color:var(--text-muted); margin-top:10px; }
.alert{ padding:14px 16px; border-radius:9px; font-size:.9rem; margin-bottom:20px; }
.alert-success{ background:rgba(52,211,153,.1); border:1px solid rgba(52,211,153,.3); color:#7EEBC1; }
.alert-error{ background:rgba(239,68,68,.1); border:1px solid rgba(239,68,68,.3); color:#FCA5A5; }

/* ---------- Contact info blocks ---------- */
.contact-info-list{ display:flex; flex-direction:column; gap:18px; }
.contact-info-item{ display:flex; gap:14px; align-items:flex-start; }
.contact-info-item .card-icon{ margin-bottom:0; flex-shrink:0; }

/* ---------- FAQ ---------- */
.faq-item{ border-bottom:1px solid var(--border); padding:22px 0; }
.faq-item summary{ cursor:pointer; font-family:var(--font-display); font-weight:600; color:var(--text); font-size:1.02rem; list-style:none; display:flex; justify-content:space-between; gap:16px; }
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::after{ content:"+"; color:var(--blue-soft); font-size:1.3rem; flex-shrink:0; }
.faq-item[open] summary::after{ content:"–"; }
.faq-item p{ margin-top:14px; color:var(--text-muted); }

/* ---------- Breadcrumbs ---------- */
.breadcrumbs{ font-size:.82rem; color:var(--text-muted); padding:20px 0 0; }
.breadcrumbs a{ color:var(--text-muted); }
.breadcrumbs a:hover{ color:var(--blue-soft); }

/* ---------- Page header (inner pages) ---------- */
.page-hero{
  padding:56px 0 64px; border-bottom:1px solid var(--border);
  background:radial-gradient(50% 60% at 90% 0%, rgba(47,111,237,.16), transparent 60%), var(--bg);
}
.page-hero p{ max-width:60ch; font-size:1.05rem; }

/* ---------- Article / resources ---------- */
.article-card{ display:flex; flex-direction:column; }
.article-meta{ font-family:var(--font-mono); font-size:.75rem; color:var(--text-muted); margin-bottom:10px; text-transform:uppercase; letter-spacing:.05em; }

/* ---------- Final CTA ---------- */
.final-cta{
  padding:80px 0; text-align:center;
  background:linear-gradient(180deg, var(--bg-alt), var(--bg));
  border-top:1px solid var(--border);
}
.final-cta-inner{ max-width:640px; margin:0 auto; }
.final-cta p{ color:var(--text-muted); margin-bottom:32px; }
.cta-buttons{ display:flex; gap:14px; justify-content:center; flex-wrap:wrap; }

/* ---------- Footer ---------- */
.site-footer{ background:#060809; border-top:1px solid var(--border); padding:64px 0 0; }
.footer-grid{ display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:40px; padding-bottom:48px; }
.footer-brand p{ color:var(--text-muted); font-size:.9rem; max-width:34ch; margin:16px 0; }
.footer-contact{ display:flex; flex-direction:column; gap:8px; font-size:.88rem; color:var(--text-muted); }
.footer-contact a{ color:var(--text-muted); }
.footer-contact a:hover{ color:var(--blue-soft); }
.footer-col h3{ font-size:.82rem; text-transform:uppercase; letter-spacing:.06em; color:var(--text-muted); margin-bottom:16px; font-family:var(--font-body); font-weight:600; }
.footer-col ul{ display:flex; flex-direction:column; gap:10px; }
.footer-col a{ color:var(--text-soft); font-size:.92rem; }
.footer-col a:hover{ color:var(--blue-soft); }
.footer-bottom{ border-top:1px solid var(--border); padding:22px 0; font-size:.82rem; color:var(--text-muted); }

/* ---------- Animated hero SVG lines ---------- */
.flow-line{ stroke-dasharray:6 6; animation:dash 3.4s linear infinite; }
@keyframes dash{ to{ stroke-dashoffset:-120; } }
.pulse-dot{ animation:pulse 2.6s ease-in-out infinite; }
@keyframes pulse{ 0%,100%{ opacity:.35; } 50%{ opacity:1; } }

/* ---------- Fade-in on scroll ---------- */
.fade-in{ opacity:0; transform:translateY(16px); transition:opacity .6s ease, transform .6s ease; }
.fade-in.is-visible{ opacity:1; transform:none; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 980px){
  .hero-inner{ grid-template-columns:1fr; }
  .hero-visual{ order:-1; }
  .grid-4{ grid-template-columns:repeat(2,1fr); }
  .grid-3{ grid-template-columns:repeat(2,1fr); }
  .process-grid{ grid-template-columns:repeat(2,1fr); }
  .footer-grid{ grid-template-columns:1fr 1fr; }
}

@media (max-width: 880px){
  .main-nav{ display:none; }
  .header-actions .btn-sm{ display:none; }
  .hamburger{ display:flex; }
  .mobile-nav{
    display:block; max-height:0; overflow:hidden; background:var(--bg-alt);
    border-top:1px solid var(--border); transition:max-height .3s ease;
  }
  .mobile-nav.open{ max-height:80vh; overflow-y:auto; }
  .mobile-nav ul{ padding:16px 24px 28px; display:flex; flex-direction:column; gap:4px; }
  .mobile-nav > ul > li > a{ display:block; padding:12px 0; font-weight:600; color:var(--text); border-bottom:1px solid var(--border); }
  .mobile-submenu{ padding:6px 0 6px 14px; display:flex; flex-direction:column; }
  .mobile-submenu a{ padding:9px 0; color:var(--text-muted); font-size:.92rem; }
  .mobile-cta{ margin-top:14px; }
  .mobile-cta a{ width:100%; justify-content:center; }
}

@media (max-width: 720px){
  .grid-2, .grid-3, .grid-4{ grid-template-columns:1fr; }
  .process-grid{ grid-template-columns:1fr; }
  .form-grid{ grid-template-columns:1fr; }
  .section{ padding:64px 0; }
  .hero{ padding:64px 0 56px; }
  .footer-grid{ grid-template-columns:1fr; gap:32px; }
  .cta-buttons{ flex-direction:column; }
  .cta-buttons .btn{ width:100%; justify-content:center; }
}