/* ============================================================
   Lovac Systems — Design System
   Brand: teal → sky-blue gradient on deep navy
   ============================================================ */
:root{
  /* Brand — sampled from the Lovac Systems logo */
  --mint:#7FE0C4;
  --teal:#4BC4CE;
  --sky:#6FB7F2;
  --blue:#3D93D8;
  --ink:#2C3644;
  --grad: linear-gradient(120deg, var(--mint) 0%, var(--sky) 55%, var(--blue) 100%);
  --grad-soft: linear-gradient(120deg, rgba(127,224,196,.16), rgba(111,183,242,.16));

  /* Neutrals (dark) */
  --bg:#0B1220;
  --bg-2:#0F1A2E;
  --surface:#121E36;
  --surface-2:#16243F;
  --line:rgba(148,180,225,.14);
  --line-strong:rgba(148,180,225,.28);

  /* Text */
  --text:#EAF1FB;
  --muted:#9DB0CC;
  --muted-2:#7E92B2;

  /* Spacing / radius */
  --r-sm:10px; --r:16px; --r-lg:22px; --r-xl:28px;
  --maxw:1180px;
  --pad:clamp(20px,5vw,40px);

  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow:0 18px 50px -20px rgba(0,0,0,.6);
  --shadow-glow:0 0 0 1px var(--line), 0 24px 60px -28px rgba(59,130,246,.45);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:'Space Grotesk',sans-serif;line-height:1.1;letter-spacing:-.02em;font-weight:700}

.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad)}

/* Accessibility */
.skip-link{position:absolute;left:-999px;top:0;z-index:200;background:var(--text);color:var(--bg);padding:10px 16px;border-radius:0 0 8px 0;font-weight:600}
.skip-link:focus{left:0}
:focus-visible{outline:2px solid var(--sky);outline-offset:3px;border-radius:6px}

/* Utility gradient text */
.grad-text{
  background:var(--grad);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}

/* ============ BUTTONS ============ */
.btn{
  --h:46px;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:var(--h);padding:0 20px;border-radius:999px;
  font-weight:600;font-size:.95rem;cursor:pointer;border:1px solid transparent;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease);
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-sm{--h:40px;font-size:.9rem;padding:0 16px}
.btn-lg{--h:54px;padding:0 28px;font-size:1rem}
.btn-block{display:flex;width:100%}
.btn-primary{background:var(--grad);color:#06121f;box-shadow:0 10px 30px -10px rgba(95,184,255,.55)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 40px -12px rgba(95,184,255,.7)}
.btn-ghost{background:rgba(255,255,255,.04);color:var(--text);border-color:var(--line-strong)}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:var(--sky);transform:translateY(-2px)}

/* ============ HEADER ============ */
.site-header{position:sticky;top:0;z-index:100;backdrop-filter:blur(14px);background:rgba(11,18,32,.72);border-bottom:1px solid transparent;transition:border-color .3s,background .3s}
.site-header.scrolled{border-bottom-color:var(--line);background:rgba(11,18,32,.9)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand-logo{height:52px;width:auto;display:block}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a:not(.btn){color:var(--muted);font-weight:500;font-size:.95rem;position:relative;transition:color .18s}
.nav-links a:not(.btn):hover{color:var(--text)}
.nav-links a:not(.btn)::after{content:"";position:absolute;left:0;bottom:-6px;height:2px;width:0;background:var(--grad);transition:width .22s var(--ease)}
.nav-links a:not(.btn):hover::after{width:100%}

.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;width:42px;height:42px}
.nav-toggle span{display:block;height:2px;width:22px;background:var(--text);border-radius:2px;transition:transform .25s var(--ease),opacity .2s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.mobile-menu{display:none;flex-direction:column;gap:4px;padding:0 var(--pad);max-height:0;overflow:hidden;background:rgba(15,26,46,.98);border-bottom:1px solid var(--line);transition:max-height .35s var(--ease),padding .35s var(--ease)}
.mobile-menu.open{max-height:420px;padding-block:16px}
.mobile-menu a:not(.btn){padding:13px 6px;color:var(--muted);font-weight:500;border-bottom:1px solid var(--line)}
.mobile-menu a:not(.btn):hover{color:var(--text)}
.mobile-menu .btn{margin-top:12px}

/* ============ HERO ============ */
.hero{position:relative;padding:clamp(70px,12vw,140px) 0 clamp(60px,9vw,110px);overflow:hidden;isolation:isolate}
.hero-bg{position:absolute;inset:0;z-index:-1}
.orb{position:absolute;border-radius:50%;filter:blur(70px);opacity:.55;will-change:transform}
.orb-1{width:540px;height:540px;background:radial-gradient(circle,rgba(110,231,199,.55),transparent 65%);top:-160px;left:-120px;animation:float1 16s ease-in-out infinite}
.orb-2{width:600px;height:600px;background:radial-gradient(circle,rgba(95,184,255,.5),transparent 65%);top:-80px;right:-180px;animation:float2 20s ease-in-out infinite}
.orb-3{width:460px;height:460px;background:radial-gradient(circle,rgba(59,130,246,.4),transparent 65%);bottom:-200px;left:30%;animation:float1 24s ease-in-out infinite}
.grid-overlay{position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:64px 64px;mask-image:radial-gradient(ellipse 80% 60% at 50% 35%,#000 30%,transparent 78%);opacity:.5}
@keyframes float1{0%,100%{transform:translate(0,0)}50%{transform:translate(28px,-26px)}}
@keyframes float2{0%,100%{transform:translate(0,0)}50%{transform:translate(-30px,24px)}}
@media (prefers-reduced-motion:reduce){.orb{animation:none}}

.hero-inner{max-width:880px}
.eyebrow{display:inline-block;font-size:.82rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--teal);background:var(--grad-soft);border:1px solid var(--line-strong);padding:7px 14px;border-radius:999px;margin-bottom:26px}
.hero h1{font-size:clamp(2.5rem,7vw,4.6rem);margin-bottom:22px}
.hero-sub{font-size:clamp(1.05rem,2.2vw,1.3rem);color:var(--muted);max-width:640px;margin-bottom:34px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:40px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px}
.hero-tags span{font-size:.85rem;color:var(--muted-2);border:1px solid var(--line);padding:6px 13px;border-radius:999px;background:rgba(255,255,255,.02)}

/* ============ STATS ============ */
.stats{border-block:1px solid var(--line);background:linear-gradient(180deg,var(--bg-2),var(--bg))}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line)}
.stats .stat{background:var(--bg);padding:clamp(28px,4vw,44px) clamp(16px,3vw,28px);text-align:center}
.stat-num{display:block;font-family:'Space Grotesk',sans-serif;font-size:clamp(2.4rem,5vw,3.4rem);font-weight:700;line-height:1;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
.stat-text{letter-spacing:-.01em}
.stat-label{display:block;margin-top:10px;color:var(--muted);font-size:.92rem}

/* ============ SECTIONS ============ */
.section{padding:clamp(64px,10vw,120px) 0}
.section-eyebrow{font-size:.82rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--teal);margin-bottom:14px}
.section-head{max-width:760px;margin-bottom:clamp(36px,5vw,56px)}
.section-head h2,.about-copy h2,.contact-copy h2,.learning h2{font-size:clamp(1.9rem,4.2vw,3rem);margin-bottom:16px}
.section-lead{color:var(--muted);font-size:clamp(1rem,1.6vw,1.15rem);max-width:640px}

/* ABOUT */
.about{background:linear-gradient(180deg,var(--bg),var(--bg-2))}
.about-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:clamp(32px,5vw,64px);align-items:start}
.about-copy p{color:var(--muted);margin-bottom:16px}
.about-points{list-style:none;margin-top:26px;display:grid;gap:16px}
.about-points li{display:flex;gap:13px;align-items:flex-start;color:var(--muted)}
.about-points .ic{flex:none;width:24px;height:24px;color:var(--teal);background:var(--grad-soft);border-radius:7px;padding:4px}
.about-points strong{color:var(--text);font-weight:600}
.about-card{position:sticky;top:96px}
.about-card-inner{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;box-shadow:var(--shadow)}
.about-card h3{font-size:1.3rem;margin-bottom:20px}
.about-card dl{display:grid;gap:14px;margin-bottom:24px}
.about-card dl>div{display:flex;justify-content:space-between;gap:16px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.about-card dt{color:var(--muted-2);font-size:.9rem}
.about-card dd{color:var(--text);font-weight:600;font-size:.95rem;text-align:right}

/* SERVICES */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:26px;transition:transform .25s var(--ease),border-color .25s,box-shadow .25s;position:relative;overflow:hidden}
.card::before{content:"";position:absolute;inset:0;background:var(--grad-soft);opacity:0;transition:opacity .3s;pointer-events:none}
.card:hover{transform:translateY(-6px);border-color:var(--line-strong);box-shadow:var(--shadow-glow)}
.card:hover::before{opacity:1}
.card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;position:relative}
.card-num{font-family:'Space Grotesk',sans-serif;font-size:.95rem;font-weight:700;color:var(--muted-2);letter-spacing:.05em}
.card-ic{width:46px;height:46px;display:grid;place-items:center;border-radius:12px;background:var(--grad-soft);border:1px solid var(--line-strong);color:var(--teal)}
.card-ic svg{width:24px;height:24px}
.card h3{font-size:1.12rem;margin-bottom:10px;position:relative}
.card p{color:var(--muted);font-size:.93rem;position:relative}

/* PARTNERS */
.partners{background:linear-gradient(180deg,var(--bg-2),var(--bg))}
.chips{list-style:none;display:flex;flex-wrap:wrap;gap:12px}
.chips li{padding:11px 18px;border:1px solid var(--line-strong);border-radius:999px;color:var(--text);font-weight:500;background:rgba(255,255,255,.02);transition:transform .2s var(--ease),border-color .2s,background .2s}
.chips li:hover{transform:translateY(-3px);border-color:var(--sky);background:var(--grad-soft)}

/* LEARNING */
.learning{background:
  radial-gradient(ellipse 60% 100% at 100% 0,rgba(95,184,255,.12),transparent 60%),
  linear-gradient(180deg,var(--bg),var(--bg-2))}
.learning-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:clamp(32px,5vw,56px);align-items:center}
.learning-tags{list-style:none;display:flex;flex-wrap:wrap;gap:12px}
.learning-tags li{padding:14px 18px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);font-weight:600;font-size:.95rem;transition:transform .2s,border-color .2s}
.learning-tags li:hover{transform:translateY(-3px);border-color:var(--teal)}

/* OFFICES */
.office-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.office{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:28px;transition:transform .25s var(--ease),border-color .25s}
.office:hover{transform:translateY(-5px);border-color:var(--line-strong)}
.office-tag{display:inline-block;font-size:.78rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--teal);margin-bottom:12px}
.office h3{font-size:1.4rem;margin-bottom:8px}
.office p{color:var(--muted);font-size:.93rem}

/* CONTACT */
.contact{background:linear-gradient(180deg,var(--bg-2),var(--bg))}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,64px);align-items:start}
.contact-list{list-style:none;margin-top:30px;display:grid;gap:16px}
.contact-list li{display:flex;align-items:center;gap:13px}
.contact-list .ic{width:40px;height:40px;flex:none;color:var(--teal);background:var(--grad-soft);border:1px solid var(--line-strong);border-radius:11px;padding:9px}
.contact-list a{color:var(--text);font-weight:500;transition:color .18s}
.contact-list a:hover{color:var(--sky)}

.contact-form{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(24px,3vw,34px);box-shadow:var(--shadow)}
.field{margin-bottom:18px}
.field label{display:block;font-size:.9rem;font-weight:600;margin-bottom:8px;color:var(--text)}
.field .opt{color:var(--muted-2);font-weight:400}
.field input,.field textarea{width:100%;background:var(--bg-2);border:1px solid var(--line-strong);border-radius:var(--r-sm);padding:13px 15px;color:var(--text);font:inherit;font-size:.95rem;transition:border-color .2s,box-shadow .2s}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--sky);box-shadow:0 0 0 3px rgba(95,184,255,.18)}
.field textarea{resize:vertical;min-height:110px}
.field input[aria-invalid="true"],.field textarea[aria-invalid="true"]{border-color:#F87171;box-shadow:0 0 0 3px rgba(248,113,113,.16)}
.err{display:block;color:#FCA5A5;font-size:.82rem;margin-top:6px;min-height:0}
.form-note{margin-top:14px;font-size:.92rem;text-align:center;min-height:1.2em}
.form-note.ok{color:var(--teal)}

/* ============ FOOTER ============ */
.site-footer{background:var(--bg-2);border-top:1px solid var(--line);padding-top:clamp(48px,6vw,72px)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:clamp(28px,4vw,48px);padding-bottom:40px}
.footer-brand img{height:60px;width:auto;margin-bottom:18px}
.footer-brand p{color:var(--muted);max-width:340px;font-size:.93rem}
.footer-col h4{font-size:.85rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted-2);margin-bottom:16px;font-family:'Inter',sans-serif;font-weight:700}
.footer-col a,.footer-col span{display:block;color:var(--muted);font-size:.93rem;margin-bottom:11px;transition:color .18s}
.footer-col a:hover{color:var(--sky)}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;padding-block:24px;border-top:1px solid var(--line);color:var(--muted-2);font-size:.86rem}
.to-top{color:var(--muted);font-weight:500}
.to-top:hover{color:var(--text)}

/* ============ REVEAL ANIMATION ============ */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ============ RESPONSIVE ============ */
@media (max-width:980px){
  .about-grid,.learning-grid,.contact-grid{grid-template-columns:1fr}
  .about-card{position:static}
  .cards{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media (max-width:760px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .mobile-menu{display:flex}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .cards,.office-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
}
@media (max-width:420px){
  .hero-cta{flex-direction:column}
  .hero-cta .btn{width:100%}
}