/* ============================================================================
   HandsFree FSD — core stylesheet
   Aesthetic brief: the site should feel like the FSD visualization screen.
   Near-black ground, thin cool rules, monospace telemetry, one blue accent
   used only for "the system is doing something", amber only for "a human is
   responsible right now". Never use blue and amber to mean the same thing.
   ========================================================================= */

/* ---------- tokens ---------- */
:root{
  --bg:            #08090B;
  --bg-2:          #0C0E12;
  --panel:         #101318;
  --panel-2:       #14181F;
  --line:          #1E232C;
  --line-2:        #2A313C;

  --ink:           #E8EAED;
  --ink-2:         #B4BAC4;
  --muted:         #8A9099;
  --faint:         #5A616C;

  --fsd:           #3E8FFF;   /* the planned path — "the system is driving"   */
  --fsd-2:         #5AC8FA;   /* lane / detection edges                        */
  --go:            #00D68F;   /* nominal, engaged, verified                    */
  --watch:         #FFB020;   /* a human is responsible / supervised           */
  --stop:          #FF453A;   /* takeover, fault, hard limit                   */
  --violet:        #A78BFA;

  --r-sm: 6px; --r: 12px; --r-lg: 20px; --r-xl: 28px;
  --sans: Inter, "Segoe UI", -apple-system, BlinkMacSystemFont, Arial, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", Consolas, "Liberation Mono", monospace;

  --pad: clamp(20px, 5vw, 80px);
  --maxw: 1240px;
  --shadow: 0 24px 60px -20px rgba(0,0,0,.85);
  --glow: 0 0 0 1px rgba(62,143,255,.25), 0 0 40px -12px rgba(62,143,255,.55);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; }
}

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* faint engineering grid, the way a HUD has one */
body::before{
  content:"";
  position:fixed; inset:0; z-index:0; pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.014) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.014) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 120% 90% at 50% 0%, #000 20%, transparent 78%);
}

img,svg,video{ max-width:100%; height:auto; display:block; }
a{ color:var(--fsd-2); text-decoration:none; }
a:hover{ color:#fff; }
:focus-visible{ outline:2px solid var(--fsd); outline-offset:3px; border-radius:4px; }

/* ---------- layout ---------- */
.wrap{ width:100%; max-width:var(--maxw); margin-inline:auto; padding-inline:var(--pad); position:relative; z-index:1; }
.section{ padding-block:clamp(64px,9vw,132px); position:relative; z-index:1; }
.section--tight{ padding-block:clamp(44px,6vw,80px); }
.section--alt{ background:linear-gradient(180deg,transparent, var(--bg-2) 12%, var(--bg-2) 88%, transparent); }
.grid{ display:grid; gap:clamp(16px,2.4vw,28px); }
.g-2{ grid-template-columns:repeat(auto-fit,minmax(300px,1fr)); }
.g-3{ grid-template-columns:repeat(auto-fit,minmax(258px,1fr)); }
.g-4{ grid-template-columns:repeat(auto-fit,minmax(210px,1fr)); }
.split{ display:grid; gap:clamp(28px,5vw,72px); grid-template-columns:1fr; align-items:center; }
@media(min-width:900px){ .split{ grid-template-columns:1.05fr .95fr; } .split--r > :first-child{ order:2; } }

/* ---------- type ---------- */
h1,h2,h3,h4{ line-height:1.08; margin:0 0 .5em; letter-spacing:-.025em; font-weight:750; }
h1{ font-size:clamp(2.5rem,6.4vw,4.75rem); letter-spacing:-.035em; }
h2{ font-size:clamp(1.85rem,3.9vw,3rem); }
h3{ font-size:clamp(1.15rem,1.9vw,1.5rem); letter-spacing:-.018em; }
h4{ font-size:1.02rem; letter-spacing:-.01em; font-weight:700; }
p{ margin:0 0 1.05em; color:var(--ink-2); }
.lede{ font-size:clamp(1.06rem,1.75vw,1.32rem); color:var(--ink-2); line-height:1.6; max-width:62ch; }
.small{ font-size:.875rem; }
.muted{ color:var(--muted); }
.faint{ color:var(--faint); }
strong{ color:var(--ink); font-weight:650; }
.hl{ color:var(--fsd-2); }
.mono{ font-family:var(--mono); }

.eyebrow{
  font-family:var(--mono); font-size:.7rem; letter-spacing:.24em; text-transform:uppercase;
  color:var(--fsd-2); margin:0 0 18px; display:flex; align-items:center; gap:10px;
}
.eyebrow::before{ content:""; width:26px; height:1px; background:var(--fsd); opacity:.75; flex:none; }
.eyebrow--amber{ color:var(--watch); } .eyebrow--amber::before{ background:var(--watch); }
.eyebrow--go{ color:var(--go); }       .eyebrow--go::before{ background:var(--go); }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:9px;
  padding:14px 26px; border-radius:100px; border:1px solid transparent;
  font-weight:650; font-size:.95rem; letter-spacing:-.01em; cursor:pointer;
  transition:transform .16s cubic-bezier(.2,.7,.3,1), background .18s, border-color .18s, box-shadow .18s;
  white-space:nowrap; text-decoration:none;
}
.btn:hover{ transform:translateY(-2px); }
.btn:active{ transform:translateY(0); }
.btn--primary{ background:var(--fsd); color:#04060B; box-shadow:0 10px 30px -12px rgba(62,143,255,.9); }
.btn--primary:hover{ background:#59a1ff; color:#04060B; box-shadow:0 16px 40px -12px rgba(62,143,255,1); }
.btn--ghost{ border-color:var(--line-2); color:var(--ink); background:rgba(255,255,255,.02); }
.btn--ghost:hover{ border-color:var(--fsd); color:#fff; background:rgba(62,143,255,.09); }
.btn--lg{ padding:17px 34px; font-size:1.02rem; }
.btn--sm{ padding:9px 17px; font-size:.85rem; }
.btn-row{ display:flex; flex-wrap:wrap; gap:12px; align-items:center; }

/* ---------- cards & panels ---------- */
.card{
  background:linear-gradient(160deg, var(--panel), var(--bg-2));
  border:1px solid var(--line); border-radius:var(--r-lg);
  padding:clamp(20px,2.5vw,30px); position:relative; overflow:hidden;
  transition:border-color .2s, transform .2s, box-shadow .2s;
}
.card:hover{ border-color:var(--line-2); }
.card--lift:hover{ transform:translateY(-4px); box-shadow:var(--shadow); border-color:rgba(62,143,255,.4); }
.card__n{ font-family:var(--mono); font-size:.72rem; color:var(--faint); letter-spacing:.16em; margin-bottom:14px; }
.card h3{ margin-bottom:.45em; }
.card p:last-child{ margin-bottom:0; }
.card--accent::after{
  content:""; position:absolute; left:0; top:0; width:100%; height:2px;
  background:linear-gradient(90deg, var(--fsd), transparent 70%);
}
.panel{ background:var(--panel); border:1px solid var(--line); border-radius:var(--r); padding:clamp(18px,2.2vw,26px); }

/* ---------- HUD / telemetry ---------- */
.hud{
  background:
    radial-gradient(120% 80% at 50% 0%, rgba(62,143,255,.09), transparent 60%),
    linear-gradient(170deg, var(--panel-2), #0A0C10);
  border:1px solid var(--line-2); border-radius:var(--r-lg);
  padding:clamp(18px,2.4vw,28px); position:relative; overflow:hidden;
}
.hud::before{
  content:""; position:absolute; inset:0; pointer-events:none;
  background:repeating-linear-gradient(0deg, rgba(255,255,255,.022) 0 1px, transparent 1px 3px);
  mix-blend-mode:overlay;
}
.hud__head{ display:flex; align-items:center; justify-content:space-between; gap:14px; flex-wrap:wrap; margin-bottom:18px; }
.hud__title{ font-family:var(--mono); font-size:.72rem; letter-spacing:.2em; text-transform:uppercase; color:var(--muted); }

.stat{ border-left:2px solid var(--line-2); padding:2px 0 2px 16px; }
.stat--fsd{ border-color:var(--fsd); } .stat--go{ border-color:var(--go); }
.stat--watch{ border-color:var(--watch); } .stat--stop{ border-color:var(--stop); }
.stat__v{ font-family:var(--mono); font-size:clamp(1.55rem,3.3vw,2.45rem); font-weight:600; letter-spacing:-.03em; color:var(--ink); line-height:1.05; }
.stat__v small{ font-size:.44em; color:var(--muted); font-weight:400; letter-spacing:.02em; margin-left:4px; }
.stat__k{ font-family:var(--mono); font-size:.68rem; letter-spacing:.15em; text-transform:uppercase; color:var(--muted); margin-top:8px; }
.stat__note{ font-size:.78rem; color:var(--faint); margin-top:5px; }

.pill{
  display:inline-flex; align-items:center; gap:7px; padding:5px 13px; border-radius:100px;
  font-family:var(--mono); font-size:.68rem; letter-spacing:.12em; text-transform:uppercase;
  border:1px solid var(--line-2); color:var(--muted); background:rgba(255,255,255,.02);
}
.pill--go{ color:var(--go); border-color:rgba(0,214,143,.35); background:rgba(0,214,143,.07); }
.pill--watch{ color:var(--watch); border-color:rgba(255,176,32,.35); background:rgba(255,176,32,.07); }
.pill--fsd{ color:var(--fsd-2); border-color:rgba(62,143,255,.35); background:rgba(62,143,255,.08); }
.pill--stop{ color:var(--stop); border-color:rgba(255,69,58,.35); background:rgba(255,69,58,.07); }
.dot{ width:7px; height:7px; border-radius:50%; background:currentColor; flex:none; }
.dot--live{ animation:blip 1.9s ease-in-out infinite; box-shadow:0 0 0 0 currentColor; }
@keyframes blip{ 0%,100%{ opacity:1; transform:scale(1); } 50%{ opacity:.35; transform:scale(.8); } }

/* ---------- bar chart (pure CSS, no libraries) ---------- */
.bars{ display:grid; gap:13px; margin:22px 0 0; }
.bar__top{ display:flex; justify-content:space-between; font-family:var(--mono); font-size:.76rem; margin-bottom:6px; }
.bar__label{ color:var(--ink-2); } .bar__val{ color:var(--fsd-2); }
.bar__track{ height:9px; border-radius:100px; background:rgba(255,255,255,.05); overflow:hidden; }
.bar__fill{ height:100%; border-radius:100px; background:linear-gradient(90deg,var(--fsd),var(--fsd-2)); width:0; transition:width 1.1s cubic-bezier(.2,.7,.3,1); }
.bar__fill--go{ background:linear-gradient(90deg,#00A870,var(--go)); }
.bar__fill--watch{ background:linear-gradient(90deg,#C77F00,var(--watch)); }
.bar__fill--stop{ background:linear-gradient(90deg,#C22B22,var(--stop)); }
.bar__fill--violet{ background:linear-gradient(90deg,#7C5CE0,var(--violet)); }

/* ---------- tables ---------- */
.table-scroll{ overflow-x:auto; border:1px solid var(--line); border-radius:var(--r); background:var(--panel); }
table{ width:100%; border-collapse:collapse; min-width:520px; font-size:.9rem; }
th,td{ text-align:left; padding:13px 16px; border-bottom:1px solid var(--line); vertical-align:top; }
th{ font-family:var(--mono); font-size:.68rem; letter-spacing:.14em; text-transform:uppercase; color:var(--muted); font-weight:500; background:rgba(255,255,255,.018); }
tbody tr:last-child td{ border-bottom:none; }
tbody tr:hover{ background:rgba(62,143,255,.04); }
td.num{ font-family:var(--mono); color:var(--ink); white-space:nowrap; }

/* ---------- nav ---------- */
.nav{
  position:sticky; top:0; z-index:60;
  backdrop-filter:blur(18px) saturate(160%); -webkit-backdrop-filter:blur(18px) saturate(160%);
  background:rgba(8,9,11,.78); border-bottom:1px solid var(--line);
}
.nav__in{ display:flex; align-items:center; gap:20px; height:66px; }
.nav__logo{ display:flex; align-items:center; gap:11px; flex:none; }
.nav__logo img{ width:30px; height:30px; }
.nav__logo b{ font-size:1.06rem; font-weight:800; letter-spacing:-.03em; color:var(--ink); }
.nav__logo b span{ font-weight:300; color:var(--fsd-2); }
.nav__links{ display:none; gap:4px; margin-left:auto; align-items:center; }
@media(min-width:1000px){ .nav__links{ display:flex; } .nav__burger{ display:none !important; } }
.nav__links a{
  padding:8px 13px; border-radius:8px; color:var(--ink-2); font-size:.9rem; font-weight:500;
  transition:color .16s, background .16s;
}
.nav__links a:hover,.nav__links a[aria-current="page"]{ color:#fff; background:rgba(255,255,255,.055); }
.nav__burger{
  margin-left:auto; display:grid; place-items:center; width:42px; height:42px;
  background:transparent; border:1px solid var(--line-2); border-radius:10px; color:var(--ink); cursor:pointer;
}
.nav__drawer{ display:none; border-top:1px solid var(--line); background:var(--bg-2); padding:10px var(--pad) 20px; }
.nav__drawer.open{ display:block; }
.nav__drawer a{ display:block; padding:12px 4px; border-bottom:1px solid var(--line); color:var(--ink-2); font-weight:500; }
.nav__drawer a:last-of-type{ border-bottom:none; }

/* ---------- hero ---------- */
.hero{ position:relative; min-height:clamp(600px,92vh,900px); display:flex; align-items:center; overflow:hidden; }
#road{ position:absolute; inset:0; width:100%; height:100%; z-index:0; opacity:.95; }
/* Held fully opaque across the text column before it starts falling off. A
   scrim that begins fading at x=0 leaves lane lines running faintly through
   the headline and sub, which reads as a display fault rather than as depth. */
.hero__veil{
  position:absolute; inset:0; z-index:1; pointer-events:none;
  background:
    linear-gradient(90deg, var(--bg) 0%, var(--bg) 38%, rgba(8,9,11,.82) 52%, rgba(8,9,11,.28) 74%, rgba(8,9,11,.7) 100%),
    linear-gradient(180deg, rgba(8,9,11,.92) 0%, transparent 26%, transparent 64%, var(--bg) 100%);
}
.hero .wrap{ z-index:2; }
.hero__box{ max-width:660px; }
.hero h1{ margin-bottom:22px; }
.hero h1 em{ font-style:normal; color:var(--fsd-2); }
.hero__sub{ font-size:clamp(1.05rem,1.85vw,1.32rem); color:var(--ink-2); max-width:53ch; margin-bottom:32px; }
.hero__strip{ display:flex; flex-wrap:wrap; gap:10px; margin-bottom:30px; }
.hero__foot{
  position:absolute; left:0; right:0; bottom:0; z-index:2; border-top:1px solid var(--line);
  background:rgba(8,9,11,.72); backdrop-filter:blur(10px);
}
.hero__foot .wrap{ display:flex; gap:clamp(18px,4vw,54px); overflow-x:auto; padding-block:18px; scrollbar-width:none; }
.hero__foot .wrap::-webkit-scrollbar{ display:none; }
.hero__foot .stat{ flex:none; }
.hero__foot .stat__v{ font-size:clamp(1.15rem,2.1vw,1.55rem); }

/* ---------- feature list ---------- */
.list{ list-style:none; margin:0; padding:0; display:grid; gap:14px; }
.list li{ display:grid; grid-template-columns:22px 1fr; gap:13px; align-items:start; color:var(--ink-2); }
.list li::before{ content:"→"; font-family:var(--mono); color:var(--fsd); line-height:1.6; }
.list--check li::before{ content:"✓"; color:var(--go); }
.list--x li::before{ content:"✕"; color:var(--stop); }
.list--dot li::before{ content:"·"; color:var(--muted); font-size:1.5em; line-height:1.1; }

/* ---------- steps ---------- */
.steps{ counter-reset:s; display:grid; gap:0; }
.step{
  counter-increment:s; display:grid; grid-template-columns:56px 1fr; gap:clamp(16px,2.5vw,28px);
  padding:26px 0; border-bottom:1px solid var(--line); align-items:start;
}
.step:last-child{ border-bottom:none; }
.step::before{
  content:counter(s,decimal-leading-zero); font-family:var(--mono); font-size:.95rem; color:var(--fsd);
  border:1px solid rgba(62,143,255,.3); border-radius:10px; width:48px; height:48px;
  display:grid; place-items:center; background:rgba(62,143,255,.06);
}
.step h3{ margin-bottom:.3em; }
.step p{ margin-bottom:0; }

/* ---------- price cards ---------- */
.price{ display:flex; flex-direction:column; }
.price__tag{ font-family:var(--mono); font-size:clamp(1.9rem,3.6vw,2.7rem); font-weight:600; letter-spacing:-.035em; color:var(--ink); margin:6px 0 2px; }
.price__tag small{ font-size:.36em; color:var(--muted); font-weight:400; letter-spacing:0; }
.price ul{ margin:18px 0 26px; }
.price .btn{ margin-top:auto; width:100%; }
.price--feat{ border-color:rgba(62,143,255,.45); box-shadow:var(--glow); }
.price--feat .card__n{ color:var(--fsd-2); }

/* ---------- callouts ---------- */
.note{ border-left:3px solid var(--fsd); background:rgba(62,143,255,.055); padding:18px 22px; border-radius:0 var(--r) var(--r) 0; margin:26px 0; }
.note--watch{ border-color:var(--watch); background:rgba(255,176,32,.055); }
.note--stop{ border-color:var(--stop); background:rgba(255,69,58,.055); }
.note--go{ border-color:var(--go); background:rgba(0,214,143,.055); }
.note p:last-child{ margin-bottom:0; }
.note b{ display:block; margin-bottom:5px; color:var(--ink); }

/* ---------- forms ---------- */
.field{ display:grid; gap:7px; margin-bottom:16px; }
.field label{ font-family:var(--mono); font-size:.7rem; letter-spacing:.14em; text-transform:uppercase; color:var(--muted); }
.field input,.field select,.field textarea{
  width:100%; padding:13px 15px; background:#0A0C10; color:var(--ink);
  border:1px solid var(--line-2); border-radius:10px; font-family:var(--sans); font-size:.96rem;
  transition:border-color .16s, box-shadow .16s;
}
.field textarea{ min-height:110px; resize:vertical; }
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none; border-color:var(--fsd); box-shadow:0 0 0 3px rgba(62,143,255,.16);
}
.field__hint{ font-size:.78rem; color:var(--faint); }
.field-row{ display:grid; gap:16px; grid-template-columns:1fr; }
@media(min-width:620px){ .field-row--2{ grid-template-columns:1fr 1fr; } }

/* ---------- accordion ---------- */
details.acc{ border-bottom:1px solid var(--line); }
details.acc summary{
  cursor:pointer; list-style:none; padding:20px 40px 20px 0; position:relative;
  font-weight:600; color:var(--ink); font-size:1.02rem;
}
details.acc summary::-webkit-details-marker{ display:none; }
details.acc summary::after{
  content:"+"; position:absolute; right:6px; top:50%; transform:translateY(-50%);
  font-family:var(--mono); font-size:1.35rem; color:var(--fsd); transition:transform .2s;
}
details.acc[open] summary::after{ content:"−"; }
details.acc > div{ padding:0 0 22px; color:var(--ink-2); max-width:78ch; }
details.acc > div p:last-child{ margin-bottom:0; }

/* ---------- footer ---------- */
.foot{ border-top:1px solid var(--line); background:var(--bg-2); padding-block:clamp(44px,6vw,72px) 30px; position:relative; z-index:1; }
.foot__grid{ display:grid; gap:34px; grid-template-columns:repeat(auto-fit,minmax(180px,1fr)); margin-bottom:38px; }
.foot h5{ font-family:var(--mono); font-size:.68rem; letter-spacing:.18em; text-transform:uppercase; color:var(--muted); margin:0 0 14px; font-weight:500; }
.foot a{ display:block; color:var(--ink-2); padding:5px 0; font-size:.92rem; }
.foot a:hover{ color:#fff; }
.foot__base{ border-top:1px solid var(--line); padding-top:24px; display:flex; flex-wrap:wrap; gap:14px; justify-content:space-between; align-items:center; font-size:.82rem; color:var(--faint); }

/* ---------- misc ---------- */
.rule{ height:1px; background:linear-gradient(90deg,var(--line),transparent); border:0; margin:clamp(40px,6vw,72px) 0; }
.tag{ display:inline-block; font-family:var(--mono); font-size:.66rem; letter-spacing:.14em; text-transform:uppercase; color:var(--faint); border:1px solid var(--line); border-radius:5px; padding:3px 8px; margin:0 6px 6px 0; }
.reveal{ opacity:0; transform:translateY(22px); transition:opacity .7s cubic-bezier(.2,.7,.3,1), transform .7s cubic-bezier(.2,.7,.3,1); }
.reveal.in{ opacity:1; transform:none; }
.center{ text-align:center; } .center .lede,.center .eyebrow{ margin-inline:auto; } .center .eyebrow{ justify-content:center; }
.mb0{ margin-bottom:0; } .mt0{ margin-top:0; }
.stack{ display:grid; gap:clamp(14px,2vw,22px); }
.kv{ display:grid; grid-template-columns:auto 1fr; gap:6px 18px; font-size:.9rem; }
.kv dt{ font-family:var(--mono); font-size:.72rem; letter-spacing:.1em; text-transform:uppercase; color:var(--muted); padding-top:3px; }
.kv dd{ margin:0; color:var(--ink-2); }
.skip{ position:absolute; left:-9999px; }
.skip:focus{ left:12px; top:12px; z-index:99; background:var(--fsd); color:#04060B; padding:10px 16px; border-radius:8px; }