/* ==========================================================================
   BLUEFROG.AI DESIGN SYSTEM — v1
   Dark, precise, enterprise-software aesthetic.
   ========================================================================== */

:root{
  --blue:#00A6F0;
  --blue-mid:#008DD3;
  --blue-deep:#005CAC;
  --ink-950:#070D1A;
  --ink-900:#0B1424;
  --ink-800:#0F1B30;
  --ink-700:#16243D;
  --line:rgba(148,178,214,.14);
  --line-strong:rgba(148,178,214,.28);
  --txt:#E8EFF8;
  --txt-dim:#9FB1C9;
  --txt-faint:#8A9CB2;
  --green:#2FD08C;
  --amber:#F5B84D;
  --red:#F27059;
  --purple:#9D7BF5;
  --light-bg:#F5F8FC;
  --light-card:#FFFFFF;
  --light-txt:#13202F;
  --light-dim:#51677E;
  --light-line:#DCE6F0;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --rad:14px;
  --rad-sm:9px;
  --shadow:0 18px 50px rgba(2,8,20,.45);
  --maxw:1200px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);background:var(--ink-950);color:var(--txt);
  line-height:1.6;font-size:16.5px;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{color:#5CC4F5}
::selection{background:rgba(0,166,240,.35)}

/* ---------- type ---------- */
.bf-h1{font-size:clamp(2.2rem,5vw,3.6rem);line-height:1.06;font-weight:800;letter-spacing:-.02em;margin:0 0 1rem;color:#fff}
.bf-h1--sub{font-size:clamp(2rem,4vw,2.9rem)}
.bf-h2{font-size:clamp(1.7rem,3.4vw,2.5rem);line-height:1.12;font-weight:800;letter-spacing:-.015em;margin:0 0 .75rem;color:#fff}
.bf-h3{font-size:1.25rem;font-weight:700;margin:0 0 .5rem;color:#fff}
.bf-h3--sm{font-size:1.05rem}
.bf-h3--xs{font-size:1rem}
.bf-lead{font-size:1.13rem;color:var(--txt-dim);max-width:46em;margin:0}
.bf-eyebrow{
  display:inline-flex;align-items:center;gap:.5rem;font-size:.74rem;font-weight:700;
  letter-spacing:.14em;text-transform:uppercase;color:var(--blue);margin-bottom:.9rem;
}
.bf-eyebrow::before{content:"";width:22px;height:2px;background:var(--blue);display:inline-block}
.bf-accent{color:var(--blue)}
.bf-mono{font-family:var(--mono)}

/* ---------- layout ---------- */
.bf-container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.bf-section{padding:96px 0;position:relative}
.bf-section--tight{padding:56px 0}
.bf-section-head{max-width:720px;margin-bottom:3rem}
.bf-section-head--center{margin-left:auto;margin-right:auto;text-align:center}
.bf-section-head--center .bf-lead{margin:0 auto}
.bf-section-head--center .bf-eyebrow{justify-content:center}

/* light variant */
.bf-section--light{background:var(--light-bg);color:var(--light-txt)}
.bf-section--light .bf-h1,.bf-section--light .bf-h2,.bf-section--light .bf-h3{color:var(--light-txt)}
.bf-section--light .bf-lead{color:var(--light-dim)}
.bf-section--light p{color:var(--light-dim)}
/* AA contrast on the light surface: brand blue is only 2.56:1 on --light-bg */
.bf-section--light a:not(.bf-btn){color:var(--blue-deep)}
.bf-section--light a:not(.bf-btn):hover{color:#00447F}
.bf-section--light .bf-eyebrow{color:var(--blue-deep)}
.bf-section--light .bf-eyebrow::before{background:var(--blue-deep)}
.bf-section--light .bf-metric__sub{color:var(--light-dim)}

/* subtle grid backdrop for hero/architecture sections */
.bf-gridbg{position:relative}
.bf-gridbg::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,160,210,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,160,210,.05) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(ellipse 90% 80% at 50% 0%,#000 30%,transparent 75%);
          mask-image:radial-gradient(ellipse 90% 80% at 50% 0%,#000 30%,transparent 75%);
}
.bf-gridbg>*{position:relative}

/* ---------- grids & cards ---------- */
.bf-grid{display:grid;gap:22px}
.bf-grid>*{min-width:0}
.bf-grid.cols-2{grid-template-columns:repeat(2,1fr)}
.bf-grid.cols-3{grid-template-columns:repeat(3,1fr)}
.bf-grid.cols-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:980px){.bf-grid.cols-3,.bf-grid.cols-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.bf-grid.cols-2,.bf-grid.cols-3,.bf-grid.cols-4{grid-template-columns:1fr}}

.bf-card{
  background:linear-gradient(180deg,var(--ink-800),var(--ink-900));
  border:1px solid var(--line);border-radius:var(--rad);padding:26px;
  transition:border-color .2s,transform .2s;
}
.bf-card:hover{border-color:rgba(0,166,240,.45);transform:translateY(-2px)}
.bf-card p{color:var(--txt-dim);font-size:.95rem;margin:.4rem 0 0}
.bf-card__icon{
  width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:rgba(0,166,240,.12);color:var(--blue);margin-bottom:1rem;
}
.bf-card__icon svg{width:24px;height:24px}
.bf-card ul{margin:.6rem 0 0;padding:0;list-style:none}
.bf-card ul li{padding:.28rem 0 .28rem 1.4rem;position:relative;color:var(--txt-dim);font-size:.93rem}
.bf-card ul li::before{content:"";position:absolute;left:0;top:.72em;width:.55em;height:.55em;
  border-radius:50%;background:rgba(0,166,240,.55)}
.bf-section--light .bf-card{background:var(--light-card);border-color:var(--light-line);box-shadow:0 8px 26px rgba(20,45,80,.07)}
.bf-section--light .bf-card p,.bf-section--light .bf-card ul li{color:var(--light-dim)}

/* ---------- software panel (fake UI window) ---------- */
.bf-panel{
  background:var(--ink-900);border:1px solid var(--line-strong);border-radius:var(--rad);
  overflow:hidden;box-shadow:var(--shadow);
}
.bf-panel__bar{
  display:flex;align-items:center;gap:8px;padding:11px 16px;
  background:var(--ink-800);border-bottom:1px solid var(--line);
}
.bf-dot{width:11px;height:11px;border-radius:50%;background:#31405C;flex:0 0 auto}
.bf-dot:nth-child(1){background:#F27059}.bf-dot:nth-child(2){background:#F5B84D}.bf-dot:nth-child(3){background:#2FD08C}
.bf-panel__title{font-family:var(--mono);font-size:.78rem;color:var(--txt-dim);margin-left:8px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bf-panel__bar .bf-tag{margin-left:auto}
.bf-panel__body{padding:22px}
@media(max-width:640px){.bf-panel__body{padding:16px}}
.bf-section--light .bf-panel{box-shadow:0 18px 50px rgba(20,45,80,.16)}

/* browser frame for screenshots */
.bf-browser{background:var(--ink-900);border:1px solid var(--line-strong);border-radius:var(--rad);overflow:hidden;box-shadow:var(--shadow)}
.bf-browser__bar{display:flex;align-items:center;gap:8px;padding:10px 14px;background:var(--ink-800);border-bottom:1px solid var(--line)}
.bf-browser__url{flex:1;margin-left:10px;background:var(--ink-950);border:1px solid var(--line);
  border-radius:99px;padding:5px 16px;font-family:var(--mono);font-size:.75rem;color:var(--txt-dim);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bf-browser img{width:100%}

/* ---------- tags ---------- */
.bf-tag{
  display:inline-flex;align-items:center;gap:.35rem;padding:.22rem .6rem;border-radius:99px;
  font-size:.68rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  background:rgba(159,177,201,.14);color:var(--txt-dim);border:1px solid rgba(159,177,201,.2);
  white-space:nowrap;
}
.bf-tag--blue{background:rgba(0,166,240,.14);color:var(--blue);border-color:rgba(0,166,240,.3)}
.bf-tag--green{background:rgba(47,208,140,.13);color:var(--green);border-color:rgba(47,208,140,.3)}
.bf-tag--amber{background:rgba(245,184,77,.13);color:var(--amber);border-color:rgba(245,184,77,.3)}
.bf-tag--red{background:rgba(242,112,89,.13);color:var(--red);border-color:rgba(242,112,89,.3)}

/* ---------- flow / pipeline diagrams ---------- */
.bf-flow{display:flex;flex-wrap:wrap;align-items:center;gap:6px;justify-content:center}
.bf-flow__step{
  background:var(--ink-800);border:1px solid var(--line-strong);border-radius:var(--rad-sm);
  padding:.55rem 1rem;font-family:var(--mono);font-size:.78rem;font-weight:600;
  letter-spacing:.06em;color:var(--txt);white-space:nowrap;
}
.bf-flow__step--hot{background:linear-gradient(135deg,var(--blue-deep),var(--blue-mid));border-color:var(--blue);color:#fff}
.bf-flow__step--dim{color:var(--txt-faint)}
.bf-flow>.bf-flow__step:not(:last-child)::after{content:none}
.bf-flow .bf-arrow{color:var(--blue);flex:0 0 auto;font-weight:700;opacity:.85}
.bf-flow .bf-arrow::before{content:"→"}
.bf-flow--vert{flex-direction:column}
.bf-flow--vert .bf-arrow::before{content:"↓"}
.bf-flow--vert .bf-flow__step{min-width:230px;text-align:center;white-space:normal}
.bf-section--light .bf-flow__step{background:#fff;border-color:var(--light-line);color:var(--light-txt);box-shadow:0 3px 10px rgba(20,45,80,.06)}
.bf-section--light .bf-flow__step--hot{background:linear-gradient(135deg,var(--blue-deep),var(--blue-mid));color:#fff;border-color:var(--blue-mid)}

/* ---------- chips ---------- */
.bf-chip-row{display:flex;flex-wrap:wrap;gap:9px}
.bf-chip{
  display:inline-flex;align-items:center;gap:.4rem;padding:.42rem .85rem;border-radius:99px;
  background:var(--ink-800);border:1px solid var(--line-strong);
  font-size:.83rem;font-weight:600;color:var(--txt-dim);
}
.bf-chip--on{background:rgba(0,166,240,.13);border-color:rgba(0,166,240,.5);color:#BEE7FB}
.bf-chip .dot{width:7px;height:7px;border-radius:50%;background:var(--green);display:inline-block}
.bf-section--light .bf-chip{background:#fff;border-color:var(--light-line);color:var(--light-dim)}
.bf-section--light .bf-chip--on{background:rgba(0,141,211,.08);border-color:rgba(0,141,211,.4);color:var(--blue-deep)}

/* ---------- metrics ---------- */
.bf-metric{text-align:center;padding:1.4rem 1rem}
.bf-metric__num{
  font-family:var(--mono);font-size:clamp(2.6rem,6vw,4.2rem);font-weight:700;line-height:1;
  background:linear-gradient(120deg,#5CC4F5,var(--blue) 45%,var(--green));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.bf-metric__label{margin-top:.6rem;font-size:.8rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--txt-dim)}
.bf-metric__sub{font-size:.85rem;color:var(--txt-faint);margin-top:.3rem}

/* ---------- timeline ---------- */
.bf-timeline{position:relative;margin:0;padding:0;list-style:none}
.bf-timeline::before{content:"";position:absolute;left:11px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(180deg,var(--blue),rgba(0,166,240,.08))}
.bf-timeline__item{position:relative;padding:0 0 2.2rem 44px}
.bf-timeline__item:last-child{padding-bottom:0}
.bf-timeline__item::before{content:"";position:absolute;left:4px;top:6px;width:16px;height:16px;
  border-radius:50%;background:var(--ink-950);border:3px solid var(--blue)}
.bf-timeline__year{font-family:var(--mono);font-weight:700;color:var(--blue);font-size:.95rem;letter-spacing:.06em}
.bf-timeline__title{font-weight:700;color:#fff;margin:.15rem 0}
.bf-timeline__body{color:var(--txt-dim);font-size:.95rem}
.bf-section--light .bf-timeline__item::before{background:var(--light-bg)}
.bf-section--light .bf-timeline__title{color:var(--light-txt)}
.bf-section--light .bf-timeline__body{color:var(--light-dim)}

/* ---------- tables ---------- */
.bf-table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%}
.bf-table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%}
.bf-table{width:100%;border-collapse:collapse;font-size:.9rem}
.bf-table th{font-size:.7rem;text-transform:uppercase;letter-spacing:.1em;color:var(--txt-faint);
  text-align:left;padding:.55rem .75rem;border-bottom:1px solid var(--line-strong)}
.bf-table td{padding:.6rem .75rem;border-bottom:1px solid var(--line);color:var(--txt-dim)}
.bf-table td:first-child{color:var(--txt)}
.bf-table .num{font-family:var(--mono);text-align:right}
.bf-table tr:last-child td{border-bottom:none}
.bf-section--light .bf-table th{color:#4A5F77;border-bottom-color:#C7D5E4}
.bf-section--light .bf-table td{color:var(--light-dim);border-bottom-color:var(--light-line)}
.bf-section--light .bf-table td:first-child{color:var(--light-txt)}

/* ---------- key/value + call card ---------- */
.bf-kv{display:flex;gap:1rem;padding:.45rem 0;border-bottom:1px dashed var(--line);font-size:.92rem}
.bf-kv:last-child{border-bottom:none}
.bf-kv__k{flex:0 0 34%;color:var(--txt-faint);font-size:.78rem;text-transform:uppercase;letter-spacing:.09em;padding-top:.15rem}
.bf-kv__v{color:var(--txt);font-size:.92rem}

/* ---------- rubric ---------- */
.bf-rubric-row{display:grid;grid-template-columns:1fr 120px 44px;align-items:center;gap:14px;padding:.5rem 0;border-bottom:1px dashed var(--line)}
.bf-rubric-row:last-child{border-bottom:none}
.bf-rubric-row__name{font-size:.92rem;color:var(--txt)}
.bf-rubric-row__score{font-family:var(--mono);font-size:.9rem;text-align:right;color:var(--txt-dim)}
.bf-bar{height:7px;border-radius:99px;background:rgba(148,178,214,.14);overflow:hidden}
.bf-bar__fill{height:100%;border-radius:99px;background:linear-gradient(90deg,var(--blue-mid),var(--blue))}
.bf-bar__fill--green{background:linear-gradient(90deg,#1FA76E,var(--green))}
.bf-bar__fill--amber{background:linear-gradient(90deg,#D99A2B,var(--amber))}
.bf-bar__fill--red{background:linear-gradient(90deg,#D4553F,var(--red))}
@media(max-width:480px){.bf-rubric-row{grid-template-columns:1fr 80px 40px}}

/* ---------- split layout ---------- */
.bf-split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.bf-split>*{min-width:0}
.bf-split__copy,.bf-split__visual{min-width:0}
@media(max-width:980px){.bf-split{grid-template-columns:1fr;gap:32px}}
.bf-split__copy p{color:var(--txt-dim)}
.bf-section--light .bf-split__copy p{color:var(--light-dim)}

/* ---------- buttons ---------- */
.bf-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  background:linear-gradient(135deg,var(--blue-mid),var(--blue));color:#fff;
  border:none;border-radius:10px;padding:.8rem 1.5rem;font-family:var(--font);
  font-size:.95rem;font-weight:700;cursor:pointer;text-decoration:none;
  transition:transform .15s,box-shadow .15s;box-shadow:0 8px 24px rgba(0,141,211,.35);
}
.bf-btn:hover{transform:translateY(-1px);box-shadow:0 12px 30px rgba(0,141,211,.45);color:#fff}
.bf-btn--ghost{background:transparent;border:1px solid var(--line-strong);color:var(--txt);box-shadow:none}
.bf-btn--ghost:hover{border-color:var(--blue);color:#fff;box-shadow:none}
.bf-btn--light{background:#fff;color:var(--blue-deep);box-shadow:0 8px 24px rgba(10,30,60,.18)}
.bf-btn--light:hover{color:var(--blue-deep)}
.bf-btn--lg{padding:1rem 2rem;font-size:1.05rem}
.bf-btn-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.bf-section--light .bf-btn--ghost{border-color:#C4D4E4;color:var(--light-txt)}
.bf-section--light .bf-btn--ghost:hover{border-color:var(--blue-mid);color:var(--blue-deep)}

/* ---------- skip link ---------- */
.bf-skip{
  position:absolute;left:12px;top:-100px;z-index:2000;
  background:var(--blue-mid,#008DD3);color:#fff;font-weight:700;font-size:.9rem;
  padding:.7rem 1.1rem;border-radius:0 0 10px 10px;text-decoration:none;
  transition:top .15s ease;
}
.bf-skip:focus,.bf-skip:focus-visible{top:0;color:#fff;outline:2px solid #fff;outline-offset:2px}
#bf-main{scroll-margin-top:80px}
#bf-main:focus{outline:none}

/* ---------- nav ---------- */
.bf-nav{
  position:sticky;top:0;z-index:1000;background:rgba(7,13,26,.82);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.bf-nav__inner{max-width:var(--maxw);margin:0 auto;padding:0 24px;display:flex;align-items:center;gap:0;height:68px;min-width:0}
.bf-nav__brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.1rem;color:#fff;margin-right:auto;padding-right:26px;white-space:nowrap;flex:0 0 auto}
.bf-nav__brand img{height:34px;width:auto;display:block}
.bf-nav__brand:hover{color:#fff}
.bf-nav__links{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0}
.bf-nav__links>li{position:relative}
.bf-nav__links a{display:block;padding:.5rem .6rem;color:var(--txt-dim);font-size:.82rem;font-weight:600;border-radius:8px;white-space:nowrap;line-height:1.3}
.bf-nav__links a:hover,.bf-nav__links a.on{color:#fff;background:rgba(148,178,214,.1)}
.bf-nav__links .caret::after{content:"▾";font-size:.6rem;margin-left:.35rem;opacity:.7}
.bf-drop{
  position:absolute;top:100%;left:0;min-width:230px;background:var(--ink-800);
  border:1px solid var(--line-strong);border-radius:12px;padding:8px;box-shadow:var(--shadow);
  opacity:0;visibility:hidden;transform:translateY(6px);transition:all .18s;list-style:none;margin:4px 0 0;
}
.bf-nav__links>li:hover>.bf-drop,.bf-nav__links>li:focus-within>.bf-drop,.bf-nav__links>li.open>.bf-drop{opacity:1;visibility:visible;transform:translateY(0)}
.bf-drop a{padding:.55rem .8rem;font-size:.86rem;border-radius:8px}
.bf-nav__cta{margin-left:14px;white-space:nowrap;flex:0 0 auto;padding:.6rem 1.05rem;font-size:.85rem;box-shadow:0 6px 18px rgba(0,141,211,.3)}
.bf-nav__burger{display:none;background:none;border:1px solid var(--line-strong);border-radius:8px;color:#fff;padding:.45rem .6rem;cursor:pointer;font-size:1.05rem;line-height:1}
@media(max-width:1240px){
  .bf-nav__burger{display:block}
  .bf-nav__cta{display:none}
  .bf-nav__links{
    display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;
    background:var(--ink-900);border-bottom:1px solid var(--line-strong);padding:12px 20px 20px;gap:2px;
    max-height:calc(100vh - 68px);overflow-y:auto;
  }
  .bf-nav.open .bf-nav__links{display:flex}
  .bf-drop{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;
    background:transparent;padding:0 0 0 14px;display:none}
  .bf-nav__links>li.open>.bf-drop{display:block}
}

/* ---------- hero ---------- */
.bf-hero{padding:110px 0 90px;position:relative;overflow:hidden}
.bf-hero--sub{padding:80px 0 60px}
.bf-hero::after{
  content:"";position:absolute;top:-320px;right:-220px;width:780px;height:780px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,141,211,.22) 0%,transparent 62%);pointer-events:none;
}
.bf-hero .bf-h1{max-width:14em}
.bf-hero__sub{font-size:1.2rem;color:var(--txt-dim);max-width:40em;margin:0 0 2rem}

/* tech line strip */
.bf-techline{
  display:flex;flex-wrap:wrap;gap:.4rem 1.1rem;align-items:center;
  font-family:var(--mono);font-size:.8rem;letter-spacing:.05em;color:var(--txt-faint);
}
.bf-techline span{display:inline-flex;align-items:center;gap:1.1rem}
.bf-techline span:not(:last-child)::after{content:"•";color:var(--blue);opacity:.7}

/* ---------- logo strips / placeholders ---------- */
.bf-logo-strip{display:flex;flex-wrap:wrap;gap:14px 34px;align-items:center;justify-content:center}
.bf-logo-strip img{height:32px;width:auto;filter:grayscale(1) brightness(1.6);opacity:.6;transition:all .2s}
.bf-logo-strip img:hover{filter:none;opacity:1}
.bf-logo-word{font-weight:800;letter-spacing:.04em;color:var(--txt-faint);font-size:1.02rem;white-space:nowrap}
.bf-section--light .bf-logo-strip img{filter:grayscale(1);opacity:.55}
.bf-section--light .bf-logo-word{color:#5C7189}
.bf-ph{
  border:1.5px dashed var(--line-strong);border-radius:var(--rad-sm);display:flex;align-items:center;
  justify-content:center;color:var(--txt-faint);font-size:.8rem;font-family:var(--mono);
  min-height:120px;text-align:center;padding:1rem;
}

/* ---------- check grid (inquiry) ---------- */
.bf-check-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
@media(max-width:900px){.bf-check-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.bf-check-grid{grid-template-columns:1fr}}
.bf-check{position:relative}
.bf-check input{position:absolute;opacity:0;inset:0;cursor:pointer}
.bf-check label{
  display:flex;align-items:center;gap:.6rem;padding:.72rem .9rem;border-radius:10px;cursor:pointer;
  background:var(--ink-800);border:1px solid var(--line-strong);font-size:.88rem;font-weight:600;
  color:var(--txt-dim);transition:all .15s;user-select:none;
}
.bf-check label::before{
  content:"";width:17px;height:17px;flex:0 0 auto;border-radius:5px;border:1.5px solid var(--txt-faint);
  display:inline-block;transition:all .15s;
}
.bf-check input:checked+label{border-color:var(--blue);background:rgba(0,166,240,.1);color:#fff}
.bf-check input:checked+label::before{
  background:var(--blue);border-color:var(--blue);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='4'%3E%3Cpath d='M5 13l4 4 10-10'/%3E%3C/svg%3E");
  background-size:11px;background-position:center;background-repeat:no-repeat;
}
/* the real input is transparent, so the focus ring has to be drawn on the label */
.bf-check input:focus-visible+label{outline:2px solid var(--blue);outline-offset:2px}
.bf-section--light .bf-check input:focus-visible+label{outline-color:var(--blue-deep)}

/* ---------- forms ---------- */
.bf-form{display:grid;gap:14px}
.bf-form .row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:560px){.bf-form .row2{grid-template-columns:1fr}}
.bf-input,.bf-textarea,.bf-select{
  width:100%;background:var(--ink-950);border:1px solid var(--line-strong);border-radius:10px;
  color:var(--txt);padding:.78rem 1rem;font-family:var(--font);font-size:.95rem;transition:border-color .15s;
}
.bf-input:focus,.bf-textarea:focus,.bf-select:focus{outline:none;border-color:var(--blue)}
.bf-textarea{min-height:110px;resize:vertical}
.bf-label{font-size:.78rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--txt-dim);margin-bottom:.35rem;display:block}
.bf-form__msg{font-size:.92rem;padding:.7rem 1rem;border-radius:10px;display:none}
.bf-form__msg.ok{display:block;background:rgba(47,208,140,.12);color:var(--green);border:1px solid rgba(47,208,140,.3)}
.bf-form__msg.err{display:block;background:rgba(242,112,89,.12);color:var(--red);border:1px solid rgba(242,112,89,.3)}

/* ---------- CTA band ---------- */
.bf-cta-band{
  background:linear-gradient(120deg,var(--blue-deep) 0%,var(--blue-mid) 55%,#0A86C4 100%);
  padding:80px 0;position:relative;overflow:hidden;
}
.bf-cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:38px 38px;
}
.bf-cta-band>*{position:relative}
.bf-cta-band .bf-h2{color:#fff}
.bf-cta-band p{color:rgba(255,255,255,.85)}

/* ---------- chart wrapper ---------- */
.bf-chart{position:relative;width:100%}
.bf-chart canvas{width:100%!important}

/* ---------- number badges / steps ---------- */
.bf-num-badge{
  width:34px;height:34px;border-radius:50%;background:rgba(0,166,240,.13);color:var(--blue);
  border:1px solid rgba(0,166,240,.4);display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-weight:700;font-size:.9rem;flex:0 0 auto;
}

/* ---------- architecture (CONNECT→UNDERSTAND→EVALUATE→ACT) ---------- */
.bf-arch{display:grid;grid-template-columns:repeat(4,1fr);gap:0;align-items:stretch}
@media(max-width:980px){.bf-arch{grid-template-columns:1fr}}
.bf-arch__col{position:relative;padding:26px 22px;border:1px solid var(--line-strong);background:var(--ink-900)}
.bf-arch__col:first-child{border-radius:var(--rad) 0 0 var(--rad)}
.bf-arch__col:last-child{border-radius:0 var(--rad) var(--rad) 0}
.bf-arch__col:not(:first-child){border-left:none}
.bf-arch__col:not(:last-child)::after{
  content:"→";position:absolute;right:-13px;top:50%;transform:translateY(-50%);z-index:2;
  width:26px;height:26px;border-radius:50%;background:var(--blue-mid);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:.85rem;font-weight:700;
}
@media(max-width:980px){
  .bf-arch__col{border-radius:var(--rad)!important;border-left:1px solid var(--line-strong);margin-bottom:26px}
  .bf-arch__col:not(:last-child)::after{content:"↓";right:auto;left:50%;top:auto;bottom:-26px;transform:translateX(-50%)}
}
.bf-arch__head{font-family:var(--mono);font-weight:700;letter-spacing:.12em;color:var(--blue);font-size:.9rem;margin-bottom:.35rem}
.bf-arch__sub{font-size:.83rem;color:var(--txt-faint);margin-bottom:1rem}
.bf-arch__col ul{list-style:none;margin:0;padding:0}
.bf-arch__col ul li{font-size:.86rem;color:var(--txt-dim);padding:.32rem 0;border-bottom:1px dashed var(--line)}
.bf-arch__col ul li:last-child{border-bottom:none}

/* ---------- project grid / filters ---------- */
.bf-filter-row{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:2rem}
.bf-filter{
  background:var(--ink-800);border:1px solid var(--line-strong);color:var(--txt-dim);
  border-radius:99px;padding:.5rem 1.05rem;font-size:.82rem;font-weight:700;cursor:pointer;
  font-family:var(--font);transition:all .15s;
}
.bf-filter:hover{color:#fff;border-color:var(--blue)}
.bf-filter.on{background:linear-gradient(135deg,var(--blue-deep),var(--blue-mid));border-color:var(--blue);color:#fff}
.bf-project{display:flex;flex-direction:column}
.bf-project__media{border-radius:var(--rad-sm);overflow:hidden;background:var(--ink-950);border:1px solid var(--line);margin-bottom:1.1rem}
.bf-project__media img{width:100%;object-fit:cover;aspect-ratio:16/10}
.bf-project__cat{font-size:.7rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);margin-bottom:.3rem}
.bf-project.hide{display:none}

/* ---------- footer ---------- */
.bf-footer{background:#050A14;border-top:1px solid var(--line);padding:70px 0 34px;font-size:.92rem}
.bf-footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1fr;gap:38px}
@media(max-width:980px){.bf-footer__grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.bf-footer__grid{grid-template-columns:1fr}}
.bf-footer h3{font-size:.75rem;letter-spacing:.13em;text-transform:uppercase;color:var(--txt-faint);margin:0 0 1rem}
.bf-footer ul{list-style:none;margin:0;padding:0}
.bf-footer ul li{margin:.45rem 0}
.bf-footer ul a{color:var(--txt-dim);font-size:.9rem}
.bf-footer ul a:hover{color:#fff}
.bf-footer__brand img{height:42px;width:auto;margin-bottom:1rem}
.bf-footer__brand p{color:var(--txt-faint);font-size:.88rem;max-width:30em}
.bf-footer__legal{margin-top:50px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;color:var(--txt-faint);font-size:.8rem}

/* ---------- modal ---------- */
.bf-modal{position:fixed;inset:0;z-index:2000;display:none;align-items:flex-start;justify-content:center;padding:4vh 16px;overflow-y:auto}
.bf-modal.open{display:flex}
.bf-modal__backdrop{position:fixed;inset:0;background:rgba(3,7,15,.78);backdrop-filter:blur(4px)}
.bf-modal__box{
  position:relative;z-index:1;width:100%;max-width:640px;background:var(--ink-900);
  border:1px solid var(--line-strong);border-radius:var(--rad);padding:34px;box-shadow:var(--shadow);
}
.bf-modal__close{position:absolute;top:14px;right:14px;background:none;border:none;color:var(--txt-faint);font-size:1.5rem;cursor:pointer;line-height:1}
.bf-modal__close:hover{color:#fff}

/* ---------- reveal animation ---------- */
[data-reveal]{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
[data-reveal].in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){[data-reveal]{opacity:1;transform:none;transition:none}}

/* ---------- dark surfaces inside light sections ----------
   .bf-panel / .bf-browser stay dark even in a .bf-section--light, so the
   light-surface overrides above must be undone inside them. */
.bf-section--light .bf-panel a:not(.bf-btn),
.bf-section--light .bf-browser a:not(.bf-btn){color:var(--blue)}
.bf-section--light .bf-panel a:not(.bf-btn):hover,
.bf-section--light .bf-browser a:not(.bf-btn):hover{color:#5CC4F5}
.bf-section--light .bf-panel p,
.bf-section--light .bf-browser p{color:var(--txt-dim)}
.bf-section--light .bf-panel .bf-note,
.bf-section--light .bf-browser .bf-note{color:var(--txt-faint)}
.bf-section--light .bf-panel .bf-ph,
.bf-section--light .bf-panel .bf-logo-word{color:var(--txt-faint)}
.bf-section--light .bf-panel .bf-table th{color:var(--txt-faint);border-bottom-color:var(--line-strong)}
.bf-section--light .bf-panel .bf-table td{color:var(--txt-dim);border-bottom-color:var(--line)}
.bf-section--light .bf-panel .bf-table td:first-child{color:var(--txt)}
.bf-section--light .bf-panel .bf-table tr:last-child td{border-bottom:none}

/* ---------- misc ---------- */
.bf-divider{height:1px;background:var(--line);border:none;margin:0}
.bf-note{font-size:.8rem;color:var(--txt-faint);font-style:italic}
.bf-section--light .bf-note{color:#5C7189}
.bf-section--light .bf-ph{color:#5C7189}
.bf-center{text-align:center}
.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.75rem}.mt-4{margin-top:2.5rem}.mt-5{margin-top:3.5rem}
.mb-0{margin-bottom:0}

/* ---------- Answer Hub ---------- */
.bf-answer-search{display:flex;gap:10px;margin:2rem 0 1.4rem;max-width:640px}
.bf-answer-search .bf-input{flex:1}
@media(max-width:520px){.bf-answer-search{flex-direction:column}}
.bf-answer-cats{display:flex;flex-wrap:wrap;gap:8px}
.bf-answer-cat{
  display:inline-flex;align-items:center;gap:.45rem;padding:.4rem .85rem;border-radius:99px;
  background:var(--ink-800);border:1px solid var(--line-strong);color:var(--txt-dim);
  font-size:.82rem;font-weight:600;transition:all .15s;
}
.bf-answer-cat span{font-family:var(--mono);font-size:.72rem;color:var(--txt-faint)}
.bf-answer-cat:hover{border-color:var(--blue);color:#fff}
.bf-answer-cat.on{background:linear-gradient(135deg,var(--blue-deep),var(--blue-mid));border-color:var(--blue);color:#fff}
.bf-answer-cat.on span{color:rgba(255,255,255,.8)}

.bf-answer-card{display:flex;flex-direction:column}
.bf-answer-card h3 a{color:inherit}
.bf-answer-card:hover h3 a{color:var(--blue)}
.bf-answer-card__meta{
  margin-top:auto;padding-top:1rem;display:flex;justify-content:space-between;align-items:center;
  gap:1rem;font-size:.78rem;color:var(--txt-faint);
}
.bf-section--light .bf-answer-card__meta{color:#5C7189}
.bf-answer-card__meta a{font-weight:700;font-size:.8rem}

.bf-answer-featured{
  display:block;padding:34px;border-radius:var(--rad);
  background:linear-gradient(135deg,rgba(0,92,172,.28),rgba(0,141,211,.12));
  border:1px solid rgba(0,166,240,.35);transition:border-color .2s,transform .2s;
}
.bf-answer-featured:hover{border-color:var(--blue);transform:translateY(-2px)}
.bf-answer-featured h2{color:#fff}

.bf-crumbs{font-size:.82rem;color:var(--txt-faint);display:flex;flex-wrap:wrap;gap:.5rem;align-items:center}
.bf-crumbs a{color:var(--txt-dim)}
.bf-crumbs a:hover{color:var(--blue)}

.bf-answer-meta{display:flex;flex-wrap:wrap;gap:.9rem;align-items:center;margin-top:1.1rem;
  font-size:.8rem;color:var(--txt-faint)}

.bf-answer-short{
  background:#fff;border-left:4px solid var(--blue);border-radius:var(--rad-sm);
  padding:24px 28px;box-shadow:0 8px 26px rgba(20,45,80,.08);margin-bottom:2.2rem;
}
.bf-answer-short p{font-size:1.12rem;line-height:1.62;color:var(--light-txt);margin:0;font-weight:500}

.bf-answer-body p{font-size:1.03rem;line-height:1.75;color:var(--light-dim);margin:0 0 1.1rem}
.bf-answer-body h2{color:var(--light-txt)}
.bf-answer-list{margin:.2rem 0 1.4rem;padding:0;list-style:none}
.bf-answer-list li{position:relative;padding:.35rem 0 .35rem 1.5rem;color:var(--light-dim);line-height:1.65}
.bf-answer-list li::before{content:"";position:absolute;left:0;top:.85em;width:.5em;height:.5em;
  border-radius:50%;background:var(--blue)}

.bf-answer-next{margin-top:2.4rem;padding-top:1.8rem;border-top:1px solid var(--light-line)}
.bf-answer-cta{
  margin-top:2.6rem;padding:28px;border-radius:var(--rad);
  background:linear-gradient(135deg,var(--ink-900),var(--ink-800));border:1px solid var(--line-strong);
}
.bf-answer-cta h3{color:#fff}
.bf-answer-cta p{color:var(--txt-dim);margin:.4rem 0 1.4rem}

.bf-pager{display:flex;gap:1.5rem;align-items:center;justify-content:center;margin-top:2.6rem;
  font-size:.9rem;color:var(--light-dim)}
.bf-pager a{font-weight:700}