/* ============================================================
   NILA SOLUTIONS — Design System
   "Where roadwork meets AI"
   Theme: Asphalt-dark · Teal (#21B6A8) · Lane-marking yellow
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  --ink-900:#080B0C;   /* deepest base */
  --ink-850:#0B0F10;
  --ink-800:#0E1314;   /* alt section */
  --ink-750:#10171800;
  --ink-700:#121A1B;   /* card */
  --ink-650:#162021;
  --ink-600:#1A2526;   /* raised */

  --line:    rgba(232,247,244,.08);
  --line-2:  rgba(232,247,244,.14);
  --line-3:  rgba(232,247,244,.22);

  --teal:    #21B6A8;
  --teal-300:#4FE6D5;
  --teal-200:#7DF1E3;
  --teal-700:#0E5750;
  --teal-900:#08302C;
  --teal-glow: rgba(33,182,168,.45);

  --lane:    #F0C24B;   /* road centre-line yellow */
  --rust:    #E8763C;   /* anomaly / detection marker */

  --text:    #ECF4F2;
  --muted:   #9DB0AD;
  --muted-2: #65807C;

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

  --container: 1240px;
  --gutter: clamp(20px, 5vw, 64px);

  --ease-out: cubic-bezier(.22,1,.36,1);
  --ease-io:  cubic-bezier(.76,0,.24,1);
  --nav-h: 78px;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}}
body{
  font-family:var(--font-body);
  background:var(--ink-900);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
::selection{background:var(--teal);color:#04100E}

/* custom scrollbar */
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-track{background:var(--ink-850)}
::-webkit-scrollbar-thumb{background:var(--ink-600);border-radius:10px;border:2px solid var(--ink-850)}
::-webkit-scrollbar-thumb:hover{background:var(--teal-700)}

/* ---------- Typography ---------- */
h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;line-height:1.04;letter-spacing:-.02em}
.h-display{
  font-size:clamp(2.9rem,8.2vw,7rem);
  font-weight:600;letter-spacing:-.035em;line-height:.96;
}
.h1{font-size:clamp(2.4rem,5.4vw,4.4rem);letter-spacing:-.03em;line-height:1.0}
.h2{font-size:clamp(1.9rem,3.6vw,3.1rem);letter-spacing:-.025em;line-height:1.05}
.h3{font-size:clamp(1.25rem,2vw,1.6rem);letter-spacing:-.015em}
.lead{font-size:clamp(1.05rem,1.5vw,1.3rem);color:var(--muted);line-height:1.6;font-weight:400}
em{font-style:italic;color:var(--teal-300);font-family:var(--font-display)}

/* mono eyebrow / data label */
.eyebrow{
  font-family:var(--font-mono);
  font-size:.72rem;letter-spacing:.34em;text-transform:uppercase;
  color:var(--teal);font-weight:400;
  display:inline-flex;align-items:center;gap:.7rem;
}
.eyebrow::before{
  content:"";width:26px;height:1px;background:var(--teal);
  opacity:.7;display:inline-block;
}
.eyebrow.center::after{content:"";width:26px;height:1px;background:var(--teal);opacity:.7}
.mono{font-family:var(--font-mono);letter-spacing:.04em}

/* ---------- Layout ---------- */
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter)}
.container-wide{max-width:1480px}
section{position:relative}
.section{padding-block:clamp(80px,11vw,160px)}
.section-sm{padding-block:clamp(56px,7vw,96px)}
.bg-800{background:var(--ink-800)}
.bg-850{background:var(--ink-850)}
.divider{height:1px;background:var(--line);width:100%}

/* mono micro caption with bullet */
.tag{
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--muted-2);display:inline-flex;align-items:center;gap:.5rem;
}
.tag .dot{width:5px;height:5px;border-radius:50%;background:var(--teal);box-shadow:0 0 8px var(--teal-glow)}

/* ---------- Buttons ---------- */
.btn{
  --pad:.95rem 1.6rem;
  position:relative;display:inline-flex;align-items:center;gap:.6rem;
  padding:var(--pad);border-radius:100px;font-weight:500;font-size:.95rem;
  font-family:var(--font-body);letter-spacing:.01em;
  transition:transform .5s var(--ease-out), background .35s, color .35s, border-color .35s;
  will-change:transform;white-space:nowrap;
}
.btn svg{width:17px;height:17px;transition:transform .45s var(--ease-out)}
.btn-primary{background:var(--teal);color:#04100E;font-weight:600}
.btn-primary:hover{background:var(--teal-300);box-shadow:0 12px 40px -12px var(--teal-glow)}
.btn-primary:hover svg{transform:translateX(4px)}
.btn-ghost{border:1px solid var(--line-2);color:var(--text);background:rgba(255,255,255,.01)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal-200);background:rgba(33,182,168,.06)}
.btn-ghost:hover svg{transform:translateX(4px)}
.btn-lg{--pad:1.1rem 2rem;font-size:1rem}

/* text link with animated underline */
.link-arrow{
  display:inline-flex;align-items:center;gap:.5rem;font-family:var(--font-mono);
  font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;color:var(--teal-200);
  position:relative;padding-bottom:3px;
}
.link-arrow::after{content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;
  background:var(--teal);transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease-out)}
.link-arrow:hover::after{transform:scaleX(1)}
.link-arrow svg{width:14px;height:14px;transition:transform .4s var(--ease-out)}
.link-arrow:hover svg{transform:translateX(4px)}

/* ---------- Navigation ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:90;height:var(--nav-h);
  display:flex;align-items:center;
  transition:transform .5s var(--ease-out), background .4s, backdrop-filter .4s, border-color .4s;
  border-bottom:1px solid transparent;
}
.nav.scrolled{background:rgba(8,11,12,.72);backdrop-filter:blur(18px) saturate(1.2);border-bottom-color:var(--line)}
.nav.hidden{transform:translateY(-100%)}
.nav__inner{width:100%;max-width:1480px;margin-inline:auto;padding-inline:var(--gutter);
  display:flex;align-items:center;justify-content:space-between;gap:2rem}
.nav__logo{display:flex;align-items:center;gap:.7rem;z-index:2}
.nav__logo img{height:34px;width:auto}
.nav__logo .wordmark{font-family:var(--font-display);font-weight:600;letter-spacing:.16em;font-size:.95rem;text-transform:uppercase}
.nav__links{display:flex;align-items:center;gap:2.4rem}
.nav__link{
  font-size:.82rem;font-family:var(--font-mono);letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted);position:relative;padding:.3rem 0;transition:color .3s;
}
.nav__link::after{content:"";position:absolute;left:0;bottom:-2px;height:1px;width:100%;background:var(--teal);
  transform:scaleX(0);transform-origin:left;transition:transform .4s var(--ease-out)}
.nav__link:hover,.nav__link.active{color:var(--text)}
.nav__link.active::after,.nav__link:hover::after{transform:scaleX(1)}
.nav__cta{display:flex;align-items:center;gap:1.2rem}
.nav__burger{display:none;width:42px;height:42px;border-radius:50%;border:1px solid var(--line-2);
  position:relative;z-index:101;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.nav__burger span{width:17px;height:1.6px;background:var(--text);transition:transform .4s var(--ease-out),opacity .3s}
.nav__burger.open span:nth-child(1){transform:translateY(6.6px) rotate(45deg)}
.nav__burger.open span:nth-child(2){opacity:0}
.nav__burger.open span:nth-child(3){transform:translateY(-6.6px) rotate(-45deg)}

/* mobile menu overlay */
.mobile-menu{
  position:fixed;inset:0;z-index:100;background:var(--ink-900);
  transform:translateY(-100%);transition:transform .65s var(--ease-io);
  display:flex;flex-direction:column;justify-content:center;padding:var(--gutter);
}
.mobile-menu.open{transform:translateY(0)}
.mobile-menu a{font-family:var(--font-display);font-size:clamp(2rem,9vw,3.2rem);font-weight:500;
  padding:.35rem 0;display:flex;align-items:baseline;gap:1rem;color:var(--text);
  border-bottom:1px solid var(--line);letter-spacing:-.02em}
.mobile-menu a .idx{font-family:var(--font-mono);font-size:.8rem;color:var(--teal);letter-spacing:.1em}
.mobile-menu .mm-foot{margin-top:2.5rem;font-family:var(--font-mono);font-size:.78rem;color:var(--muted);letter-spacing:.06em;line-height:2}

/* ---------- Road centre-line scroll progress ---------- */
.road-progress{
  position:fixed;top:0;left:max(18px,2.2vw);width:3px;height:100vh;z-index:80;
  pointer-events:none;mix-blend-mode:screen;
}
@media(max-width:880px){.road-progress{display:none}}
.road-progress .lane-bg{position:absolute;inset:0;width:2px;left:.5px;
  background:repeating-linear-gradient(to bottom, var(--line-2) 0 14px, transparent 14px 30px)}
.road-progress .lane-fill{position:absolute;top:0;left:.5px;width:2px;height:0;
  background:repeating-linear-gradient(to bottom, var(--lane) 0 14px, transparent 14px 30px);
  box-shadow:0 0 10px rgba(240,194,75,.5)}
.road-progress .drone{position:absolute;left:-7px;top:0;width:16px;height:16px;transform:translateY(-50%)}
.road-progress .drone::before{content:"";position:absolute;inset:0;border-radius:50%;
  border:1.5px solid var(--teal);box-shadow:0 0 14px var(--teal-glow)}
.road-progress .drone::after{content:"";position:absolute;inset:5px;border-radius:50%;background:var(--teal)}

/* ---------- Reveal / motion utilities ---------- */
.reveal{opacity:0;transform:translateY(30px);will-change:transform,opacity}
.reveal-up{opacity:0;transform:translateY(40px)}
.clip-reveal{clip-path:inset(0 100% 0 0)}
[data-split] .word{display:inline-block;overflow:hidden;vertical-align:top}
[data-split] .word > span{display:inline-block;transform:translateY(110%);will-change:transform}

/* ---------- Cards ---------- */
.card{
  position:relative;background:var(--ink-700);border:1px solid var(--line);
  border-radius:18px;overflow:hidden;transition:border-color .5s,transform .6s var(--ease-out),background .5s;
}
.card:hover{border-color:var(--line-3)}
.card__corner{position:absolute;top:14px;right:16px;font-family:var(--font-mono);font-size:.7rem;color:var(--muted-2);letter-spacing:.1em}

/* HUD framing corners */
.hud-frame{position:relative}
.hud-frame::before,.hud-frame::after{content:"";position:absolute;width:14px;height:14px;border:1.5px solid var(--teal);opacity:.55}
.hud-frame::before{top:10px;left:10px;border-right:0;border-bottom:0}
.hud-frame::after{bottom:10px;right:10px;border-left:0;border-top:0}

/* ---------- Footer ---------- */
.footer{background:var(--ink-850);border-top:1px solid var(--line);position:relative;overflow:hidden}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:3rem;
  padding-block:clamp(60px,8vw,100px) 3rem}
.footer__brand img{height:38px;margin-bottom:1.4rem}
.footer__col h4{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--muted-2);margin-bottom:1.4rem;font-weight:400}
.footer__col a,.footer__col p{display:block;color:var(--muted);font-size:.92rem;margin-bottom:.7rem;transition:color .3s}
.footer__col a:hover{color:var(--teal-200)}
.footer__bottom{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;
  padding-block:1.8rem;border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.06em;color:var(--muted-2)}
.footer__social{display:flex;gap:.7rem}
.footer__social a{width:38px;height:38px;border:1px solid var(--line-2);border-radius:50%;
  display:flex;align-items:center;justify-content:center;transition:all .35s var(--ease-out)}
.footer__social a:hover{border-color:var(--teal);background:var(--teal);color:#04100E;transform:translateY(-3px)}
.footer__social svg{width:16px;height:16px}
.footer__giant{font-family:var(--font-display);font-weight:600;letter-spacing:-.04em;line-height:.85;
  font-size:clamp(3.6rem,17vw,15rem);color:transparent;-webkit-text-stroke:1px var(--line-2);
  white-space:nowrap;padding-bottom:.1em;user-select:none;pointer-events:none}

/* ---------- Marquee ---------- */
.marquee{overflow:hidden;border-block:1px solid var(--line);padding-block:1.5rem;background:var(--ink-850)}
.marquee__track{display:flex;gap:3.5rem;width:max-content;animation:marquee 38s linear infinite}
.marquee:hover .marquee__track{animation-play-state:paused}
.marquee__item{display:flex;align-items:center;gap:1.2rem;font-family:var(--font-display);
  font-size:clamp(1.1rem,2vw,1.7rem);font-weight:500;color:var(--muted);white-space:nowrap;letter-spacing:-.01em}
.marquee__item .star{color:var(--teal);font-size:1rem}
@keyframes marquee{to{transform:translateX(-50%)}}

/* ---------- Boot loader ---------- */
.boot{position:fixed;inset:0;z-index:200;background:var(--ink-900);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1.6rem}
.boot.done{opacity:0;visibility:hidden;transition:opacity .7s,visibility .7s}
.boot__logo{height:60px;opacity:.94}
.boot__bar{width:min(240px,52vw);height:2px;background:var(--line-2);overflow:hidden;border-radius:2px}
.boot__bar i{display:block;height:100%;width:0;background:var(--teal);box-shadow:0 0 12px var(--teal-glow)}
.boot__txt{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.28em;text-transform:uppercase;color:var(--muted-2)}

/* ---------- Custom cursor ---------- */
.cursor{position:fixed;top:0;left:0;width:34px;height:34px;border:1px solid var(--teal);border-radius:50%;
  pointer-events:none;z-index:150;transform:translate(-50%,-50%);transition:width .3s,height .3s,background .3s,opacity .3s;
  mix-blend-mode:difference;will-change:transform}
.cursor.hover{width:54px;height:54px;background:rgba(33,182,168,.12)}
.cursor.hidden{opacity:0}
@media(hover:none),(max-width:880px){.cursor{display:none}}

/* ---------- Utility ---------- */
.text-teal{color:var(--teal-300)}
.text-muted{color:var(--muted)}
.text-center{text-align:center}
.max-60{max-width:60ch}.max-50{max-width:50ch}.max-44{max-width:44ch}
.mx-auto{margin-inline:auto}
.grid{display:grid}
.flex{display:flex}
.noise{position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.04;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}

/* ---------- Responsive ---------- */
@media(max-width:980px){
  .footer__grid{grid-template-columns:1fr 1fr;gap:2.2rem}
  .footer__brand{grid-column:1/-1}
}
@media(max-width:880px){
  .nav__links,.nav__cta .btn{display:none}
  .nav__burger{display:flex}
  .nav__cta{gap:0}
}
@media(max-width:560px){
  .footer__grid{grid-template-columns:1fr}
  .footer__bottom{flex-direction:column;align-items:flex-start}
}