/* ============================================================
   EVA Systems — brand stylesheet
   Enterprise Vehicle Agent • evasystems.ai
   ============================================================ */

:root{
  --bg:        #04060d;
  --bg-2:      #070b16;
  --panel:     rgba(255,255,255,.035);
  --panel-2:   rgba(255,255,255,.055);
  --stroke:    rgba(120,180,255,.14);
  --stroke-2:  rgba(120,180,255,.28);

  --ice:       #d7ecff;
  --text:      #e9f1fb;
  --muted:     #9db0cc;
  --muted-2:   #6f819c;

  --cyan:      #35c6f4;
  --blue:      #2f7bff;
  --deep:      #1a4fd0;
  --navy:      #0c294f;

  --grad:      linear-gradient(120deg, #43d0f5 0%, #2f7bff 55%, #1b53e0 100%);
  --grad-soft: linear-gradient(120deg, rgba(67,208,245,.16), rgba(47,123,255,.10));
  --glow:      0 0 60px rgba(47,123,255,.35);

  --radius:    18px;
  --radius-sm: 12px;
  --maxw:      1180px;
  --ease:      cubic-bezier(.22,.61,.36,1);
  --font-head: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
}

*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body{
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--text);
  line-height:1.65;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

/* backdrop glow field */
body::before{
  content:"";
  position:fixed; inset:0; z-index:-2;
  background:
    radial-gradient(760px 520px at 78% -6%, rgba(47,123,255,.20), transparent 60%),
    radial-gradient(680px 520px at 6% 8%, rgba(53,198,244,.12), transparent 62%),
    radial-gradient(900px 700px at 50% 108%, rgba(26,79,208,.14), transparent 60%),
    var(--bg);
}
body::after{
  content:"";
  position:fixed; inset:0; z-index:-1; opacity:.5; pointer-events:none;
  background-image:linear-gradient(rgba(120,180,255,.045) 1px, transparent 1px),
                   linear-gradient(90deg, rgba(120,180,255,.045) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
          mask-image:radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
}

a{ color:inherit; text-decoration:none; }
img{ max-width:100%; display:block; }
.wrap{ width:100%; max-width:var(--maxw); margin:0 auto; padding:0 24px; }

/* ---------- typography ---------- */
h1,h2,h3,h4{ font-family:var(--font-head); font-weight:600; line-height:1.08; letter-spacing:-.02em; }
h1{ font-size:clamp(2.3rem, 5.4vw, 4.1rem); }
h2{ font-size:clamp(1.8rem, 3.6vw, 2.8rem); }
h3{ font-size:1.28rem; letter-spacing:-.01em; }
p{ color:var(--muted); }
.lead{ font-size:clamp(1.05rem,1.5vw,1.28rem); color:#c3d3ea; }
.grad-text{ background:var(--grad); -webkit-background-clip:text; background-clip:text; color:transparent; }
.eyebrow{
  display:inline-flex; align-items:center; gap:9px;
  font-family:var(--font-head); font-size:.78rem; font-weight:500;
  letter-spacing:.22em; text-transform:uppercase; color:var(--cyan);
  padding:7px 15px; border:1px solid var(--stroke-2); border-radius:999px;
  background:var(--grad-soft);
}
.eyebrow .dot{ width:7px; height:7px; border-radius:50%; background:var(--cyan); box-shadow:0 0 10px var(--cyan); }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--font-head); font-weight:500; font-size:.98rem;
  padding:14px 26px; border-radius:999px; cursor:pointer; border:1px solid transparent;
  transition:transform .25s var(--ease), box-shadow .25s var(--ease), background .25s;
  white-space:nowrap;
}
.btn svg{ width:18px; height:18px; }
.btn-primary{ background:var(--grad); color:#fff; box-shadow:0 10px 30px rgba(47,123,255,.35); }
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 16px 44px rgba(47,123,255,.5); }
.btn-ghost{ background:rgba(255,255,255,.03); color:var(--text); border-color:var(--stroke-2); }
.btn-ghost:hover{ transform:translateY(-2px); border-color:var(--cyan); background:rgba(53,198,244,.08); }
.btn-lg{ padding:16px 32px; font-size:1.05rem; }

/* ---------- nav ---------- */
.nav{
  position:sticky; top:0; z-index:60;
  backdrop-filter:blur(16px); -webkit-backdrop-filter:blur(16px);
  background:rgba(4,6,13,.62); border-bottom:1px solid rgba(120,180,255,.08);
  transition:background .3s, border-color .3s;
}
.nav.scrolled{ background:rgba(4,6,13,.9); border-bottom-color:var(--stroke); }
.nav-inner{ display:flex; align-items:center; justify-content:space-between; height:72px; }
.brand{ display:flex; align-items:center; gap:12px; }
.brand-mark{
  width:40px; height:40px; border-radius:11px; object-fit:cover; object-position:50% 18%;
  border:1px solid var(--stroke-2); background:#0a1424; box-shadow:0 0 20px rgba(47,123,255,.25);
}
.brand-name{ font-family:var(--font-head); font-weight:600; font-size:1.16rem; letter-spacing:.04em; }
.brand-name b{ font-weight:600; }
.brand-name span{ color:var(--cyan); font-weight:400; font-size:.66rem; letter-spacing:.34em; display:block; margin-top:-3px; }
.nav-links{ display:flex; align-items:center; gap:6px; }
.nav-links a{
  font-size:.95rem; color:var(--muted); padding:9px 15px; border-radius:10px;
  transition:color .2s, background .2s;
}
.nav-links a:hover, .nav-links a.active{ color:var(--text); background:rgba(255,255,255,.05); }
.nav-cta{ margin-left:10px; }
.nav-toggle{ display:none; background:none; border:0; color:var(--text); cursor:pointer; padding:8px; }
.nav-toggle svg{ width:26px; height:26px; }

/* ---------- layout sections ---------- */
section{ position:relative; }
.section{ padding:96px 0; }
.section-sm{ padding:64px 0; }
.center{ text-align:center; }
.section-head{ max-width:720px; margin:0 auto 56px; }
.section-head.left{ margin-left:0; }
.section-head p{ margin-top:16px; font-size:1.08rem; }

/* ---------- hero ---------- */
.hero{ padding:72px 0 40px; position:relative; }
.hero-grid{ display:grid; grid-template-columns:1.05fr .95fr; gap:48px; align-items:center; }
.hero h1{ margin:22px 0 20px; }
.hero .lead{ max-width:540px; }
.hero-cta{ display:flex; gap:14px; margin-top:34px; flex-wrap:wrap; }
.hero-trust{ margin-top:34px; display:flex; align-items:center; gap:18px; flex-wrap:wrap; color:var(--muted-2); font-size:.86rem; }
.hero-trust .pill{ display:inline-flex; align-items:center; gap:8px; }
.hero-trust svg{ width:15px; height:15px; color:var(--cyan); }
.hero-figure{ position:relative; display:flex; justify-content:center; align-items:center; }
.hero-figure .halo{
  position:absolute; width:78%; aspect-ratio:1; border-radius:50%;
  background:radial-gradient(circle, rgba(47,123,255,.42), rgba(53,198,244,.12) 45%, transparent 70%);
  filter:blur(12px); z-index:0; animation:pulse 6s var(--ease) infinite;
}
.hero-figure .ring{
  position:absolute; width:92%; aspect-ratio:1; border-radius:50%;
  border:1px solid rgba(120,180,255,.22); z-index:0;
}
.hero-figure .ring.r2{ width:74%; border-style:dashed; border-color:rgba(120,180,255,.14); animation:spin 40s linear infinite; }
.hero-robot{ position:relative; z-index:1; width:min(460px,90%); filter:drop-shadow(0 30px 60px rgba(0,0,0,.6)); animation:float 7s ease-in-out infinite; }
@keyframes float{ 0%,100%{ transform:translateY(0); } 50%{ transform:translateY(-16px); } }
@keyframes pulse{ 0%,100%{ transform:scale(1); opacity:.9; } 50%{ transform:scale(1.06); opacity:1; } }
@keyframes spin{ to{ transform:rotate(360deg); } }

/* floating spec chips on hero */
.chip{
  position:absolute; z-index:2; display:flex; align-items:center; gap:9px;
  padding:10px 14px; border-radius:12px; font-size:.82rem; color:var(--text);
  background:rgba(8,14,26,.82); border:1px solid var(--stroke-2);
  backdrop-filter:blur(8px); box-shadow:0 12px 30px rgba(0,0,0,.45);
}
.chip b{ font-family:var(--font-head); font-weight:600; }
.chip .ic{ width:26px; height:26px; display:grid; place-items:center; border-radius:8px; background:var(--grad-soft); color:var(--cyan); }
.chip .ic svg{ width:15px; height:15px; }
.chip.c1{ top:8%; left:-4%; animation:float 6s ease-in-out infinite; }
.chip.c2{ bottom:16%; right:-6%; animation:float 7.5s ease-in-out .6s infinite; }
.chip.c3{ bottom:2%; left:6%; animation:float 6.8s ease-in-out 1.1s infinite; }

/* ---------- marquee / logos-ish strip ---------- */
.strip{ border-top:1px solid rgba(120,180,255,.08); border-bottom:1px solid rgba(120,180,255,.08); padding:22px 0; }
.strip-inner{ display:flex; align-items:center; justify-content:space-between; gap:24px; flex-wrap:wrap; }
.strip-item{ display:flex; align-items:center; gap:11px; color:var(--muted); font-size:.92rem; }
.strip-item svg{ width:19px; height:19px; color:var(--cyan); }

/* ---------- cards / grids ---------- */
.grid{ display:grid; gap:22px; }
.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{
  position:relative; background:var(--panel); border:1px solid var(--stroke);
  border-radius:var(--radius); padding:30px; overflow:hidden;
  transition:transform .3s var(--ease), border-color .3s, background .3s;
}
.card::after{
  content:""; position:absolute; inset:0; border-radius:inherit; pointer-events:none;
  background:radial-gradient(400px 200px at var(--mx,50%) var(--my,0%), rgba(53,198,244,.10), transparent 60%);
  opacity:0; transition:opacity .3s;
}
.card:hover{ transform:translateY(-6px); border-color:var(--stroke-2); background:var(--panel-2); }
.card:hover::after{ opacity:1; }
.card .ic-lg{
  width:52px; height:52px; border-radius:14px; display:grid; place-items:center;
  background:var(--grad-soft); border:1px solid var(--stroke-2); color:var(--cyan); margin-bottom:20px;
}
.card .ic-lg svg{ width:26px; height:26px; }
.card h3{ margin-bottom:10px; }
.card p{ font-size:.98rem; }

/* product feature card (large) */
.feature{
  position:relative; border:1px solid var(--stroke); border-radius:22px; overflow:hidden;
  background:linear-gradient(180deg, rgba(255,255,255,.045), rgba(255,255,255,.015));
  display:grid; grid-template-columns:1.1fr .9fr; gap:0; align-items:stretch;
  transition:border-color .3s, transform .3s var(--ease);
}
.feature:hover{ border-color:var(--stroke-2); transform:translateY(-4px); }
.feature.reverse{ grid-template-columns:.9fr 1.1fr; }
.feature.reverse .feature-body{ order:2; }
.feature-body{ padding:44px; }
.feature-media{
  position:relative; min-height:340px; display:grid; place-items:center;
  background:radial-gradient(600px 400px at 60% 40%, rgba(47,123,255,.22), transparent 65%);
  border-left:1px solid var(--stroke);
  overflow:hidden;
}
.feature.reverse .feature-media{ border-left:0; border-right:1px solid var(--stroke); }
.feature-media img{ width:86%; border-radius:14px; box-shadow:0 24px 60px rgba(0,0,0,.5); }
.feature-media.plain img{ box-shadow:none; border-radius:0; filter:drop-shadow(0 20px 40px rgba(0,0,0,.5)); }
.tag{
  display:inline-block; font-family:var(--font-head); font-size:.72rem; letter-spacing:.16em;
  text-transform:uppercase; color:var(--cyan); padding:5px 12px; border-radius:999px;
  border:1px solid var(--stroke-2); background:var(--grad-soft); margin-bottom:16px;
}
.tag.dev{ color:#ffd27a; border-color:rgba(255,210,122,.3); background:rgba(255,210,122,.08); }

/* checklist */
.checks{ list-style:none; margin-top:22px; display:grid; gap:13px; }
.checks li{ display:flex; gap:12px; align-items:flex-start; color:#c6d5ec; font-size:.98rem; }
.checks li svg{ width:20px; height:20px; color:var(--cyan); flex-shrink:0; margin-top:2px; }

/* stats */
.stats{ display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
.stat{ text-align:center; padding:30px 18px; border:1px solid var(--stroke); border-radius:var(--radius); background:var(--panel); }
.stat .num{ font-family:var(--font-head); font-weight:700; font-size:clamp(2rem,3.4vw,2.9rem); line-height:1; }
.stat .lbl{ margin-top:10px; font-size:.9rem; color:var(--muted); }

/* steps */
.steps{ counter-reset:step; display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.step{ position:relative; padding:30px; border:1px solid var(--stroke); border-radius:var(--radius); background:var(--panel); }
.step::before{
  counter-increment:step; content:"0" counter(step);
  font-family:var(--font-head); font-weight:700; font-size:2.4rem;
  background:var(--grad); -webkit-background-clip:text; background-clip:text; color:transparent;
  display:block; margin-bottom:12px;
}
.step h3{ margin-bottom:8px; }
.step p{ font-size:.96rem; }

/* banded section with texture */
.band{
  position:relative; border-radius:26px; overflow:hidden; padding:70px 48px; text-align:center;
  border:1px solid var(--stroke-2);
  background:linear-gradient(120deg, rgba(12,41,79,.85), rgba(6,11,22,.9));
}
.band .tex{ position:absolute; inset:0; z-index:0; opacity:.28; object-fit:cover; width:100%; height:100%; }
.band .glow{ position:absolute; inset:0; z-index:0; background:radial-gradient(700px 300px at 50% 0%, rgba(47,123,255,.35), transparent 60%); }
.band > *{ position:relative; z-index:1; }
.band h2{ max-width:720px; margin:0 auto 14px; }
.band p{ max-width:560px; margin:0 auto 30px; color:#c3d3ea; }
.band .hero-cta{ justify-content:center; }

/* page header (subpages) */
.pagehead{ padding:72px 0 20px; text-align:center; }
.pagehead .eyebrow{ margin-bottom:20px; }
.pagehead h1{ font-size:clamp(2.1rem,4.6vw,3.4rem); }
.pagehead p{ max-width:640px; margin:18px auto 0; font-size:1.1rem; }

/* split content */
.split{ display:grid; grid-template-columns:1fr 1fr; gap:52px; align-items:center; }
.split img{ border-radius:var(--radius); border:1px solid var(--stroke); }
.split-media{ position:relative; }
.split-media .frame{ border-radius:var(--radius); overflow:hidden; border:1px solid var(--stroke-2); box-shadow:0 30px 70px rgba(0,0,0,.5); }

/* values list */
.values{ display:grid; gap:16px; }
.value{ display:flex; gap:16px; padding:22px; border:1px solid var(--stroke); border-radius:var(--radius); background:var(--panel); transition:border-color .3s, background .3s; }
.value:hover{ border-color:var(--stroke-2); background:var(--panel-2); }
.value .ic{ width:46px; height:46px; flex-shrink:0; border-radius:12px; display:grid; place-items:center; background:var(--grad-soft); color:var(--cyan); border:1px solid var(--stroke-2); }
.value .ic svg{ width:23px; height:23px; }
.value h3{ font-size:1.1rem; margin-bottom:5px; }
.value p{ font-size:.96rem; }

/* ---------- contact / forms ---------- */
.contact-grid{ display:grid; grid-template-columns:.85fr 1.15fr; gap:44px; align-items:start; }
.contact-info .info-item{ display:flex; gap:14px; padding:18px 0; border-bottom:1px solid rgba(120,180,255,.09); }
.contact-info .info-item:last-child{ border-bottom:0; }
.contact-info .ic{ width:44px; height:44px; flex-shrink:0; border-radius:12px; display:grid; place-items:center; background:var(--grad-soft); color:var(--cyan); border:1px solid var(--stroke-2); }
.contact-info .ic svg{ width:21px; height:21px; }
.contact-info h4{ font-family:var(--font-head); font-size:1rem; margin-bottom:2px; }
.contact-info a, .contact-info span{ color:var(--muted); font-size:.96rem; }
.contact-info a:hover{ color:var(--cyan); }

.form-card{ background:var(--panel); border:1px solid var(--stroke); border-radius:var(--radius); padding:34px; }
.form-row{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.field{ margin-bottom:16px; }
.field label{ display:block; font-size:.85rem; color:var(--muted); margin-bottom:7px; font-family:var(--font-head); letter-spacing:.02em; }
.field label .req{ color:var(--cyan); }
.field input, .field select, .field textarea{
  width:100%; padding:13px 15px; border-radius:var(--radius-sm);
  background:rgba(4,7,14,.7); border:1px solid var(--stroke); color:var(--text);
  font-family:var(--font-body); font-size:.98rem; transition:border-color .2s, box-shadow .2s;
}
.field textarea{ resize:vertical; min-height:120px; }
.field input:focus, .field select:focus, .field textarea:focus{
  outline:none; border-color:var(--cyan); box-shadow:0 0 0 3px rgba(53,198,244,.15);
}
.field select{ appearance:none; -webkit-appearance:none; cursor:pointer; }
.form-note{ font-size:.82rem; color:var(--muted-2); margin-top:6px; }
.form-status{ margin-top:14px; font-size:.95rem; display:none; padding:12px 16px; border-radius:10px; }
.form-status.ok{ display:block; color:#8ef0c0; background:rgba(46,204,113,.1); border:1px solid rgba(46,204,113,.3); }
.form-status.err{ display:block; color:#ff9a9a; background:rgba(231,76,60,.1); border:1px solid rgba(231,76,60,.3); }

/* faq */
.faq{ max-width:820px; margin:0 auto; }
.qa{ border:1px solid var(--stroke); border-radius:var(--radius-sm); margin-bottom:12px; background:var(--panel); overflow:hidden; }
.qa summary{ cursor:pointer; padding:20px 24px; font-family:var(--font-head); font-weight:500; font-size:1.05rem; list-style:none; display:flex; justify-content:space-between; align-items:center; gap:16px; }
.qa summary::-webkit-details-marker{ display:none; }
.qa summary::after{ content:"+"; font-size:1.5rem; color:var(--cyan); transition:transform .2s; }
.qa[open] summary::after{ transform:rotate(45deg); }
.qa p{ padding:0 24px 22px; font-size:.98rem; }

/* ---------- footer ---------- */
.footer{ border-top:1px solid var(--stroke); padding:64px 0 30px; margin-top:40px; background:rgba(4,6,13,.6); }
.footer-grid{ display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:36px; }
.footer .brand{ margin-bottom:16px; }
.footer-about{ font-size:.94rem; max-width:320px; }
.footer h5{ font-family:var(--font-head); font-size:.8rem; letter-spacing:.16em; text-transform:uppercase; color:var(--muted-2); margin-bottom:16px; }
.footer-col a{ display:block; color:var(--muted); font-size:.95rem; padding:6px 0; transition:color .2s; }
.footer-col a:hover{ color:var(--cyan); }
.footer-bottom{ margin-top:48px; padding-top:24px; border-top:1px solid rgba(120,180,255,.08); display:flex; justify-content:space-between; align-items:center; gap:16px; flex-wrap:wrap; color:var(--muted-2); font-size:.86rem; }

/* ---------- reveal animation ---------- */
.reveal{ opacity:0; transform:translateY(26px); transition:opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in{ opacity:1; transform:none; }
.reveal.d1{ transition-delay:.08s; } .reveal.d2{ transition-delay:.16s; } .reveal.d3{ transition-delay:.24s; } .reveal.d4{ transition-delay:.32s; }

/* ---------- responsive ---------- */
@media (max-width:960px){
  .hero-grid{ grid-template-columns:1fr; gap:20px; }
  .hero-figure{ order:-1; margin-bottom:6px; }
  .hero-robot{ width:min(340px,72%); }
  .grid-4{ grid-template-columns:repeat(2,1fr); }
  .stats{ grid-template-columns:repeat(2,1fr); }
  .feature, .feature.reverse{ grid-template-columns:1fr; }
  .feature.reverse .feature-body{ order:0; }
  .feature-media{ border-left:0 !important; border-right:0 !important; border-top:1px solid var(--stroke); min-height:280px; }
  .split{ grid-template-columns:1fr; gap:30px; }
  .contact-grid{ grid-template-columns:1fr; gap:30px; }
  .footer-grid{ grid-template-columns:1fr 1fr; gap:28px; }
  .steps{ grid-template-columns:1fr; }
}
@media (max-width:680px){
  .nav-links{
    position:fixed; inset:72px 0 auto 0; flex-direction:column; align-items:stretch; gap:2px;
    background:rgba(5,8,16,.97); backdrop-filter:blur(16px); padding:16px 20px 24px;
    border-bottom:1px solid var(--stroke); transform:translateY(-140%); transition:transform .35s var(--ease);
    height:auto;
  }
  .nav-links.open{ transform:none; }
  .nav-links a{ padding:14px 12px; font-size:1.05rem; }
  .nav-cta{ margin:8px 0 0; }
  .nav-toggle{ display:block; }
  .grid-2, .grid-3, .grid-4, .stats{ grid-template-columns:1fr; }
  .form-row{ grid-template-columns:1fr; }
  .section{ padding:68px 0; }
  .band{ padding:52px 24px; }
  .feature-body{ padding:30px; }
  .chip{ display:none; }
}

/* reduced motion */
@media (prefers-reduced-motion:reduce){
  *{ animation:none !important; scroll-behavior:auto; }
  .reveal{ opacity:1; transform:none; }
}