/* ============================================================
   Fortstak Platform Operations
   Brand: navy #0D2137 · blue #0080FF · off-white #F7F6F2
   One operational-green status dot. Space Grotesk / Inter / JetBrains Mono.
   ============================================================ */

:root{
  --paper:#F7F6F2;      /* brand off-white */
  --raised:#FFFFFF;     /* cards, inputs */
  --ink:#0D2137;        /* brand navy — headings + strong text */
  --ink-soft:#55627A;   /* muted */
  --line:#E4E2DA;       /* hairline on off-white */
  --dark:#0D2137;       /* navy dark sections */
  --dark-soft:#9DB0CC;  /* muted on navy */
  --dark-line:rgba(255,255,255,.14);
  --paper-onDark:#F7F6F2;
  --signal:#0080FF;         /* brand blue accent */
  --signal-onDark:#4AA3FF;  /* legible blue on navy */
  --status:#26A85B;         /* operational green — status dot only */

  --font-display:"Space Grotesk", system-ui, sans-serif;
  --font-body:"Inter", system-ui, sans-serif;
  --font-mono:"JetBrains Mono", ui-monospace, monospace;

  --wrap:1120px;
  --pad:clamp(1.25rem, 5vw, 2.5rem);
  --sec:clamp(5rem, 11vw, 9.5rem);
  --r:7px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:var(--font-body);
  font-size:17px;line-height:1.62;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:var(--pad)}
.mono{font-family:var(--font-mono);font-feature-settings:"tnum" 1}

/* type */
.eyebrow{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--signal);margin-bottom:1.4rem;font-weight:500}
.eyebrow--onDark{color:var(--signal-onDark)}
.hero__title{font-family:var(--font-display);font-weight:600;font-size:clamp(2.9rem,8.2vw,6.1rem);
  line-height:.98;letter-spacing:-.035em;margin-bottom:1.6rem}
.h2{font-family:var(--font-display);font-weight:600;font-size:clamp(2rem,5vw,3.4rem);
  line-height:1.03;letter-spacing:-.03em;margin-bottom:1.3rem}
.h2--onDark{color:var(--paper-onDark)}
h3{font-family:var(--font-display);font-weight:600;letter-spacing:-.01em}
.hero__lede,.lead{font-size:clamp(1.05rem,1.9vw,1.32rem);line-height:1.55;color:var(--ink-soft);max-width:40ch}
.lead{max-width:52ch;margin-bottom:3.2rem}
.lead--onDark{color:var(--dark-soft)}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--paper) 84%,transparent);
  backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--line)}
.nav__inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:.6rem}
.brand__logo{height:30px;width:auto;display:block}
.brand__word{font-family:var(--font-display);font-weight:700;letter-spacing:.02em;font-size:1.02rem;color:var(--ink)}
.brand__sub{font-family:var(--font-mono);font-size:.72rem;color:var(--ink-soft);letter-spacing:.03em}
.nav__links{display:flex;align-items:center;gap:2rem}
.nav__links a{font-size:.92rem;color:var(--ink-soft);transition:color .18s}
.nav__links a:hover{color:var(--ink)}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav__toggle span{width:22px;height:2px;background:var(--ink);display:block}
.nav__mobile{display:none;flex-direction:column;gap:.4rem;padding:1rem var(--pad) 1.4rem;border-bottom:1px solid var(--line)}
.nav__mobile a{padding:.5rem 0;color:var(--ink-soft)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;font-family:var(--font-body);
  font-weight:500;font-size:.96rem;padding:.85rem 1.5rem;border-radius:var(--r);border:1px solid transparent;
  cursor:pointer;transition:transform .16s ease,background .18s,color .18s,border-color .18s;white-space:nowrap}
.btn--sm{padding:.55rem 1rem;font-size:.88rem}
.btn--ink{background:var(--ink);color:var(--paper)}
.btn--ink:hover{transform:translateY(-1px);background:#081627}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--ink)}
.btn--signal{background:var(--signal);color:#fff;padding:.95rem 1.7rem;font-weight:600}
.btn--signal:hover{transform:translateY(-1px);background:#0068d6}

/* hero */
.hero{padding-top:clamp(3.5rem,8vw,6.5rem);padding-bottom:var(--sec)}
.hero__cta{display:flex;gap:.9rem;flex-wrap:wrap;margin-bottom:3.4rem}
.status{display:flex;align-items:center;gap:1.4rem;flex-wrap:wrap;background:var(--raised);
  border:1px solid var(--line);border-radius:var(--r);padding:1rem 1.3rem;max-width:640px;margin-bottom:2rem}
.status__live{display:flex;align-items:center;gap:.6rem}
.status__live .mono{font-size:.76rem;letter-spacing:.12em;color:var(--ink)}
.dot{width:9px;height:9px;border-radius:50%;background:var(--status);position:relative;flex:none}
.dot::after{content:"";position:absolute;inset:-4px;border-radius:50%;background:var(--status);opacity:.35;
  animation:pulse 2.4s ease-out infinite}
@keyframes pulse{0%{transform:scale(.6);opacity:.5}70%{transform:scale(2.1);opacity:0}100%{opacity:0}}
.spark{flex:1;min-width:120px;height:30px}
.spark polyline{fill:none;stroke:var(--signal);stroke-width:1.5;opacity:.8;vector-effect:non-scaling-stroke;
  stroke-linejoin:round;stroke-linecap:round}
.status__metrics{display:flex;gap:.5rem;font-size:.72rem;color:var(--ink-soft);letter-spacing:.04em}
.status__metrics .sep{opacity:.4}
.cred{font-size:.7rem;letter-spacing:.12em;color:var(--ink-soft);opacity:.9}

/* sections */
.section{padding-block:var(--sec)}
.section + .section{border-top:1px solid var(--line)}
.note{margin-top:3rem;max-width:56ch;color:var(--ink);font-size:1.05rem}

/* problem grid */
.grid{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);
  overflow:hidden;margin-top:3.4rem}
.grid--4{grid-template-columns:repeat(4,1fr)}
.pain{background:var(--paper);padding:1.8rem 1.6rem 2rem}
.pain__no{color:var(--signal);font-size:.78rem;letter-spacing:.1em}
.pain h3{font-size:1.18rem;margin:1.6rem 0 .5rem;color:var(--ink)}
.pain p{font-size:.96rem;color:var(--ink-soft);line-height:1.5}

/* dark band */
.section--band{background:var(--dark);color:var(--paper-onDark);border-top:1px solid var(--dark-line)!important}
.ladder{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:3.6rem;
  border-top:1px solid var(--dark-line)}
.ladder li{padding:2rem 1.4rem 0;border-right:1px solid var(--dark-line)}
.ladder li:last-child{border-right:0}
.ladder li>.mono{color:var(--signal-onDark);font-size:.78rem;letter-spacing:.1em}
.ladder h3{color:var(--paper-onDark);font-size:1.3rem;margin:1rem 0 .5rem}
.ladder p{color:var(--dark-soft);font-size:.95rem;line-height:1.5}

/* offerings */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:1.4rem;margin-top:3.6rem}
.card{background:var(--raised);border:1px solid var(--line);border-radius:var(--r);padding:2rem 1.9rem 2.1rem}
.card--feature{border-top:2px solid var(--signal)}
.card__tag{font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--signal)}
.card h3{font-size:1.5rem;margin:.7rem 0 .5rem;color:var(--ink)}
.card__price{font-size:.9rem;color:var(--ink);font-weight:500}
.card__price span{color:var(--ink-soft);font-weight:400}
.card__desc{color:var(--ink-soft);font-size:.98rem;margin:1.2rem 0 1.4rem}
.ticks{list-style:none;display:grid;gap:.55rem}
.ticks li{position:relative;padding-left:1.4rem;font-size:.94rem;color:var(--ink)}
.ticks li::before{content:"";position:absolute;left:0;top:.5em;width:7px;height:7px;
  border:1.5px solid var(--signal);border-radius:2px}
.grid--tight{gap:1px;margin-top:1.4rem}
.mini{background:var(--paper);padding:1.7rem 1.5rem}
.mini h3{font-size:1.12rem;margin-bottom:.35rem;color:var(--ink)}
.mini__meta{font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--signal);margin-bottom:.7rem}
.mini p{font-size:.92rem;color:var(--ink-soft);line-height:1.5}

/* platform stack */
.stack{margin-top:3.6rem;border-top:1px solid var(--line)}
.stack__row{display:grid;grid-template-columns:80px 1fr 1fr;gap:1.5rem;align-items:baseline;
  padding:1.7rem 0;border-bottom:1px solid var(--line)}
.stack__k{color:var(--signal);font-size:.76rem;letter-spacing:.08em;padding-top:.2rem}
.stack__b h3{font-size:1.28rem;margin-bottom:.3rem;color:var(--ink)}
.stack__b .mono{font-size:.82rem;color:var(--ink-soft)}
.stack__d{color:var(--ink-soft);font-size:.98rem}
.foundations{margin-top:2.2rem;font-size:.72rem;letter-spacing:.1em;color:var(--ink-soft)}

/* split / white-label */
.section--split{background:var(--raised)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.split__r p{color:var(--ink-soft);font-size:1.1rem;line-height:1.6;margin-bottom:1.4rem}
.split__note{font-size:.72rem;letter-spacing:.1em;color:var(--signal)}

/* contact / cta */
.cta{background:var(--dark);color:var(--paper-onDark)}
.cta__live{display:inline-flex;align-items:center;gap:.6rem;margin-bottom:1.6rem}
.cta__live .mono{font-size:.72rem;letter-spacing:.16em;color:var(--dark-soft)}
.contact{display:grid;grid-template-columns:1.4fr 1fr;gap:3rem;margin-top:2.6rem;align-items:start}
.form{display:grid;gap:.8rem}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:.8rem}
.form input,.form textarea,.form select{width:100%;background:rgba(255,255,255,.04);
  border:1px solid var(--dark-line);border-radius:var(--r);padding:.9rem 1rem;color:var(--paper-onDark);
  font-family:var(--font-body);font-size:.98rem}
.form select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%239DB0CC' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 1rem center}
.form select option{background:var(--dark);color:var(--paper-onDark)}
.form input::placeholder,.form textarea::placeholder{color:#7C89A0}
.form input:focus,.form textarea:focus,.form select:focus{outline:none;border-color:var(--signal-onDark);
  background:rgba(255,255,255,.06)}
.form .btn--signal{margin-top:.4rem;justify-self:start}
.form__fallback{font-size:.86rem;color:var(--dark-soft);margin-top:.3rem}
.form__fallback a{color:var(--signal-onDark);border-bottom:1px solid transparent}
.form__fallback a:hover{border-color:var(--signal-onDark)}
.direct{border-left:1px solid var(--dark-line);padding-left:2rem}
.direct__k{font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:var(--signal-onDark);margin-bottom:.8rem}
.direct h3{color:var(--paper-onDark);font-size:1.35rem;margin-bottom:1.1rem}
.direct__list{list-style:none;display:grid;gap:.7rem;font-size:.9rem}
.direct__list a{color:var(--dark-soft);border-bottom:1px solid transparent;transition:color .18s,border-color .18s}
.direct__list a:hover{color:var(--paper-onDark);border-color:var(--signal-onDark)}

/* footer */
.footer{background:var(--paper);border-top:1px solid var(--line);padding-block:3rem}
.footer__inner{display:flex;justify-content:space-between;gap:2rem;flex-wrap:wrap}
.footer__brand{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap}
.footer__brand .brand__logo{height:26px}
.footer__brand .mono{flex-basis:100%;color:var(--ink-soft);font-size:.8rem;margin-top:.6rem}
.footer__meta{display:flex;flex-direction:column;gap:.5rem;font-size:.8rem;color:var(--ink-soft);text-align:right}
.footer__meta a:hover{color:var(--ink)}

/* reveal */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* responsive */
@media (max-width:900px){
  .grid--4{grid-template-columns:repeat(2,1fr)}
  .ladder{grid-template-columns:repeat(2,1fr)}
  .ladder li{border-bottom:1px solid var(--dark-line)}
  .ladder li:nth-child(2n){border-right:0}
  .feature{grid-template-columns:1fr}
  .split{grid-template-columns:1fr;gap:1.4rem}
  .stack__row{grid-template-columns:60px 1fr;gap:.4rem 1rem}
  .stack__d{grid-column:2}
  .contact{grid-template-columns:1fr;gap:2rem}
  .direct{border-left:0;border-top:1px solid var(--dark-line);padding-left:0;padding-top:2rem}
}
@media (max-width:640px){
  .nav__links{display:none}
  .nav__toggle{display:flex}
  .grid--4{grid-template-columns:1fr}
  .ladder{grid-template-columns:1fr}
  .ladder li{border-right:0}
  .form__row{grid-template-columns:1fr}
  .footer__meta{text-align:left}
  .status__metrics{width:100%}
}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .dot::after{animation:none}
  html{scroll-behavior:auto}
}