/* =========================================================
   HYDRONEG — Hydrogen-Powered Drone Systems
   Design tokens — matched to hydroneg.com brand system
   ========================================================= */
:root{
  --ink-900:#0b0b0f;      /* true black — header, footer, dark sections */
  --ink-800:#17171d;      /* panel black */
  --ink-700:#26262f;      /* borders / dark hover */
  --purple-500:#a06bff;   /* hero purple */
  --purple-700:#7c3aed;   /* deep purple — gradient depth */
  --purple-100:#ede4ff;   /* pale purple tint for light sections */
  --green-500:#8cff3d;    /* neon lime — primary CTA */
  --green-300:#c3ff9c;    /* light lime — highlights on dark */
  --green-700:#4fae12;    /* text-safe darker lime for light backgrounds */
  --pink-500:#ff3ea5;     /* hot pink — secondary accent, sparingly */
  --cyan-accent:#4cc9f0;  /* small cyan detail accent */
  --paper-50:#f7f5fb;     /* base background — faint purple-white */
  --paper-0:#ffffff;
  --line:#e4dcf5;
  --ink-600:#4a4658;      /* body text on light */
  --ink-400:#7b7488;      /* muted text */
  --line-dark:rgba(255,255,255,.12);

  --font-display:'Anton', 'Archivo Black', 'Segoe UI', sans-serif;
  --font-body:'Inter', 'Segoe UI', sans-serif;
  --font-mono:'JetBrains Mono', ui-monospace, monospace;

  --radius:16px;
  --radius-sm:10px;
  --container:1120px;
  --stroke:2.5px solid #0b0b0f;
  --pop-shadow:4px 4px 0 #0b0b0f;
  --pop-shadow-sm:3px 3px 0 #0b0b0f;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  background:var(--paper-50);
  color:var(--ink-800);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:400;
  text-transform:uppercase;
  color:var(--ink-900);
  line-height:1.04;
  letter-spacing:.005em;
  margin:0 0 .5em;
}
h1{font-size:clamp(2.4rem,5.6vw,3.8rem);}
h2{font-size:clamp(1.7rem,3.6vw,2.5rem);}
h3{font-size:1.3rem;}
p{margin:0 0 1em;color:var(--ink-600);}
a{color:var(--purple-700);text-decoration:none;font-weight:600;}
a:hover{text-decoration:underline;}
.mono{font-family:var(--font-mono);}
img{max-width:100%;display:block;}

.container{max-width:var(--container);margin:0 auto;padding:0 24px;}
.eyebrow{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  font-weight:700;
  color:var(--green-700);
  display:inline-flex;align-items:center;gap:8px;
  margin-bottom:14px;
}
.eyebrow::before{content:'';width:18px;height:1px;background:var(--green-700);}
.dark-band .eyebrow, .hero .eyebrow, .contact-card .eyebrow{color:var(--green-500);}
.dark-band .eyebrow::before, .hero .eyebrow::before, .contact-card .eyebrow::before{background:var(--green-500);}

/* ---------- Buttons — comic-sticker style ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-display);font-weight:400;font-size:.92rem;
  text-transform:uppercase;letter-spacing:.06em;
  padding:14px 26px;border-radius:999px;
  cursor:pointer;transition:transform .12s ease, box-shadow .12s ease;
  border:var(--stroke);
}
.btn:hover{text-decoration:none;transform:translate(-2px,-2px);}
.btn-primary{background:var(--green-500);color:var(--ink-900);box-shadow:var(--pop-shadow);}
.btn-primary:hover{box-shadow:6px 6px 0 #0b0b0f;background:var(--green-300);}
.btn-ghost{background:transparent;color:var(--paper-0);border:2.5px solid rgba(255,255,255,.4);}
.btn-ghost:hover{border-color:var(--green-500);color:var(--green-500);}
.btn-amber{background:var(--pink-500);color:var(--ink-900);box-shadow:var(--pop-shadow);}
.btn-amber:hover{box-shadow:6px 6px 0 #0b0b0f;background:#ff6bb8;}
.btn-outline{background:var(--paper-0);border:var(--stroke);color:var(--ink-900);box-shadow:var(--pop-shadow-sm);}
.btn-outline:hover{box-shadow:5px 5px 0 #0b0b0f;}

/* ---------- Header / Nav ---------- */
header.site{
  position:sticky;top:0;z-index:50;
  background:var(--ink-900);
  border-bottom:3px solid var(--green-500);
}
.nav{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 24px;max-width:var(--container);margin:0 auto;
  position:relative;
}
.brand{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-display);font-weight:400;font-size:1.3rem;
  text-transform:uppercase;letter-spacing:.05em;
  color:var(--paper-0);
}
.brand .h2mark{
  width:32px;height:32px;border-radius:9px;
  background:linear-gradient(135deg,var(--green-500),var(--cyan-accent));
  border:2px solid var(--purple-500);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-weight:700;color:var(--ink-900);font-size:.75rem;
}
.navlinks{display:flex;gap:8px;align-items:center;}
.navlinks a{
  color:#ffffff;font-size:.82rem;font-weight:700;
  font-family:var(--font-display);text-transform:uppercase;letter-spacing:.1em;
  padding:8px 14px;border-radius:8px;border:2px solid transparent;
  transition:border-color .15s ease, color .15s ease, background .15s ease;
}
.navlinks a:hover{color:var(--green-500);text-decoration:none;border-color:var(--green-500);}
.navlinks a.active{color:var(--ink-900);background:var(--green-500);border-color:var(--ink-900);}
.nav-cta{display:flex;gap:10px;align-items:center;}
.navtoggle{
  display:none;background:transparent;cursor:pointer;
  width:42px;height:38px;border:2.5px solid var(--paper-0);border-radius:9px;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  padding:0;flex-shrink:0;
}
.navtoggle span{display:block;width:20px;height:2.5px;background:var(--paper-0);border-radius:2px;transition:transform .2s ease, opacity .2s ease;}
.navtoggle.active span:nth-child(1){transform:translateY(7.5px) rotate(45deg);}
.navtoggle.active span:nth-child(2){opacity:0;}
.navtoggle.active span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg);}

/* ---------- Hero ---------- */
.hero{
  background:
    radial-gradient(650px 420px at 88% 10%, rgba(160,107,255,.28), transparent 60%),
    radial-gradient(500px 380px at 8% 85%, rgba(140,255,61,.14), transparent 60%),
    var(--ink-900);
  color:var(--paper-0);
  padding:96px 0 76px;
  position:relative;overflow:hidden;
}
.hero::after{
  content:'';position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.09) 1.5px, transparent 1.5px);
  background-size:22px 22px;
}
.hero .container{position:relative;}
.hero h1, .hero h2, .hero h3, .hero h4{color:var(--paper-0);}
.hero p.lead{color:rgba(255,255,255,.86);font-size:1.1rem;max-width:560px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px;position:relative;z-index:1;}

/* Fuel gauge — signature element: hydrogen vs battery endurance bar */
.gauge-panel{
  margin-top:56px;background:rgba(11,11,15,.35);
  border:var(--stroke);border-radius:var(--radius);
  padding:22px 24px;backdrop-filter:blur(6px);
}
.gauge-row{display:flex;align-items:center;gap:16px;margin:14px 0;}
.gauge-label{width:150px;flex-shrink:0;font-family:var(--font-mono);font-size:.78rem;color:rgba(255,255,255,.75);}
.gauge-track{flex:1;height:12px;border-radius:999px;background:rgba(0,0,0,.3);border:1.5px solid rgba(255,255,255,.2);overflow:hidden;}
.gauge-fill{height:100%;border-radius:999px;}
.gauge-fill.h2{background:linear-gradient(90deg,var(--green-500),var(--green-300));width:0%;transition:width 1.1s cubic-bezier(.2,.8,.2,1);}
.gauge-fill.lipo{background:linear-gradient(90deg,var(--pink-500),#ff9dc9);width:0%;transition:width 1.1s cubic-bezier(.2,.8,.2,1) .12s;}
.gauge-fill.lion{background:linear-gradient(90deg,var(--cyan-accent),#a6e6ff);width:0%;transition:width 1.1s cubic-bezier(.2,.8,.2,1) .24s;}
.gauge-value{width:70px;text-align:right;font-family:var(--font-mono);font-size:.82rem;color:var(--paper-0);font-weight:700;}

/* ---------- Stat strip ---------- */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:-46px;position:relative;z-index:2;}
.stat{background:var(--paper-0);padding:26px 24px;border:var(--stroke);border-radius:var(--radius);box-shadow:var(--pop-shadow);}
.stat .num{font-family:var(--font-display);font-size:2.1rem;color:var(--ink-900);}
.stat .num span{color:var(--purple-700);}
.stat .cap{font-size:.85rem;color:var(--ink-400);margin-top:4px;font-weight:600;}

/* ---------- Sections ---------- */
section{padding:80px 0;}
section.tight{padding:56px 0;}
.section-head{max-width:640px;margin-bottom:40px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}

.card{
  background:var(--paper-0);border:var(--stroke);border-radius:var(--radius);
  padding:26px;transition:box-shadow .15s ease, transform .15s ease;
  box-shadow:var(--pop-shadow-sm);
}
.card:hover{box-shadow:6px 6px 0 #0b0b0f;transform:translate(-2px,-2px);}
.card .icon{
  width:46px;height:46px;border-radius:11px;
  background:var(--green-500);color:var(--ink-900);
  border:2px solid var(--ink-900);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
  font-family:var(--font-mono);font-weight:700;
}

.timeline{border-left:3px solid var(--green-500);padding-left:28px;margin-left:8px;}
.tl-item{position:relative;padding-bottom:36px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:'';position:absolute;left:-35px;top:4px;width:14px;height:14px;border-radius:50%;
  background:var(--green-500);border:2.5px solid var(--ink-900);
}
.tl-year{font-family:var(--font-mono);color:var(--green-500);font-size:.85rem;font-weight:700;margin-bottom:4px;}

.dark-band{background:var(--ink-900);color:var(--paper-0);}
.dark-band h2, .dark-band h3, .dark-band h4{color:var(--paper-0);}
.dark-band p{color:rgba(255,255,255,.7);}
.dark-band .card{background:var(--ink-800);border-color:var(--line-dark);box-shadow:none;}
.dark-band .card:hover{box-shadow:none;transform:none;border-color:var(--green-500);}

/* ---------- Tables (comparison) ---------- */
.table-wrap{overflow-x:auto;border:var(--stroke);border-radius:var(--radius);background:var(--paper-0);box-shadow:var(--pop-shadow);}
table{width:100%;border-collapse:collapse;min-width:640px;}
th,td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line);font-size:.93rem;}
thead th{
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.06em;text-transform:uppercase;
  color:var(--ink-400);background:var(--paper-50);
}
tbody tr:last-child td{border-bottom:none;}
td.h2col, th.h2col{background:rgba(140,255,61,.12);}
th.h2col{color:var(--green-700);}
td strong{color:var(--ink-900);}
.pill{display:inline-block;padding:2px 10px;border-radius:999px;font-family:var(--font-mono);font-size:.72rem;font-weight:700;}
.pill.good{background:var(--green-500);color:var(--ink-900);}
.pill.mid{background:var(--pink-500);color:var(--ink-900);}
.source-note{font-size:.8rem;color:var(--ink-400);margin-top:10px;}

/* ---------- Product cards ---------- */
.product-card{display:flex;flex-direction:column;height:100%;}
.product-card .spec{display:flex;justify-content:space-between;font-family:var(--font-mono);font-size:.82rem;padding:7px 0;border-bottom:1px dashed var(--line);color:var(--ink-600);}
.product-card .spec:last-of-type{border-bottom:none;}
.product-card .tag{
  align-self:flex-start;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.06em;
  text-transform:uppercase;font-weight:700;color:var(--purple-700);background:var(--purple-100);
  padding:4px 10px;border-radius:999px;margin-bottom:14px;border:1.5px solid var(--purple-500);
}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;}
.contact-card{
  background:var(--ink-900);color:var(--paper-0);border-radius:var(--radius);
  padding:36px;position:relative;overflow:hidden;border:var(--stroke);box-shadow:var(--pop-shadow);
}
.contact-line{
  display:flex;align-items:center;gap:14px;padding:16px 0;border-bottom:1px solid rgba(255,255,255,.12);
}
.contact-line:last-child{border-bottom:none;}
.contact-line .ico{
  width:42px;height:42px;border-radius:10px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:var(--green-500);color:var(--ink-900);border:2px solid var(--paper-0);
}
.contact-line a{color:var(--paper-0);font-weight:700;font-size:1.05rem;}
.contact-line span{display:block;font-size:.78rem;color:rgba(255,255,255,.55);font-weight:500;}

.form-card{background:var(--paper-0);border:var(--stroke);border-radius:var(--radius);padding:32px;box-shadow:var(--pop-shadow);}
.field{margin-bottom:18px;}
.field label{display:block;font-size:.82rem;font-weight:700;color:var(--ink-800);margin-bottom:6px;}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:2px solid var(--line);border-radius:var(--radius-sm);
  font-family:var(--font-body);font-size:.95rem;background:var(--paper-50);color:var(--ink-800);
}
.field textarea{resize:vertical;min-height:100px;}
.field input:focus,.field select:focus,.field textarea:focus{outline:2.5px solid var(--purple-500);outline-offset:1px;border-color:var(--purple-500);}

/* ---------- WhatsApp floating button ---------- */
.wa-float{
  position:fixed;right:22px;bottom:22px;z-index:60;
  width:60px;height:60px;border-radius:50%;
  background:#25D366;color:#fff;display:flex;align-items:center;justify-content:center;
  border:3px solid var(--ink-900);
  box-shadow:var(--pop-shadow);
  transition:transform .15s ease;
}
.wa-float:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 #0b0b0f;}

/* ---------- Footer ---------- */
footer.site{background:var(--ink-900);color:rgba(255,255,255,.55);padding:48px 0 28px;border-top:3px solid var(--green-500);}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;margin-bottom:32px;}
footer.site h4{color:var(--green-500);font-size:.82rem;margin-bottom:14px;font-family:var(--font-display);text-transform:uppercase;letter-spacing:.06em;font-weight:400;}
footer.site a{color:rgba(255,255,255,.62);display:block;margin-bottom:9px;font-size:.9rem;font-weight:500;}
footer.site a:hover{color:var(--green-500);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:22px;font-size:.82rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;}

/* ---------- Utility ---------- */
.center{text-align:center;}
.mt-0{margin-top:0;}
.badge-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px;}
.badge{
  font-family:var(--font-mono);font-size:.72rem;padding:5px 10px;border-radius:6px;font-weight:700;
  background:var(--paper-0);border:2px solid var(--ink-900);color:var(--ink-800);
}

@media (max-width:860px){
  .grid-2,.grid-3,.grid-4,.footer-grid{grid-template-columns:1fr;}
  .stats{grid-template-columns:1fr;margin-top:24px;}
  .contact-grid{grid-template-columns:1fr;}
  .navtoggle{display:flex;}
  .navlinks{
    display:none;position:absolute;top:calc(100% + 3px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:6px;
    background:var(--ink-900);border-bottom:3px solid var(--green-500);
    padding:16px 24px 22px;z-index:40;
  }
  .navlinks.open{display:flex;}
  .navlinks a{padding:12px 14px;}
  .nav-cta{margin-left:auto;margin-right:12px;}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  .gauge-fill{transition:none;}
}

/* ---------- Comic doodles / badges (hero + accents) ---------- */
.doodle{
  position:absolute;font-family:var(--font-display);text-transform:uppercase;
  font-size:1.6rem;color:transparent;-webkit-text-stroke:2px var(--green-500);
  transform:rotate(-8deg);pointer-events:none;letter-spacing:.02em;
}
.doodle.purple{-webkit-text-stroke:2px var(--purple-500);transform:rotate(6deg);}
.doodle.top-left{top:16px;left:max(24px, calc((100% - 1120px)/2 + 24px));z-index:0;}
.doodle.bottom-right{bottom:16px;right:max(24px, calc((100% - 1120px)/2 + 24px));z-index:0;}

.badge-pill{
  display:inline-flex;align-items:center;gap:6px;
  border:2px solid var(--green-500);color:var(--green-500);
  font-family:var(--font-display);text-transform:uppercase;letter-spacing:.05em;
  font-size:.72rem;padding:7px 16px;border-radius:999px;margin-bottom:20px;
}

.underline-mark{
  text-decoration:none;border-bottom:5px solid var(--purple-500);
  padding-bottom:2px;display:inline-block;
}

.rating-row{display:flex;align-items:center;gap:10px;margin-top:26px;flex-wrap:wrap;}
.rating-row .stars{color:var(--green-500);letter-spacing:2px;font-size:1rem;}
.rating-row .rtext{color:rgba(255,255,255,.7);font-size:.88rem;font-weight:600;}

.btn-dark{
  background:var(--ink-900);color:var(--paper-0);border:2.5px solid var(--paper-0);
}
.btn-dark:hover{border-color:var(--green-500);color:var(--green-500);}

/* ---------- Hero sticker card (mascot slot) ---------- */
.hero-visual{position:relative;display:flex;justify-content:center;align-items:flex-start;}
.sticker-card{
  position:relative;background:var(--ink-900);border:3px solid var(--purple-500);
  border-radius:20px;box-shadow:9px 9px 0 var(--purple-500);
  padding:34px;width:100%;max-width:340px;
  display:flex;align-items:center;justify-content:center;
}
.sticker-card svg{width:100%;height:auto;}
.sticker-badge{
  position:absolute;top:-22px;right:-30px;
  background:var(--purple-500);color:var(--ink-900);
  font-family:var(--font-display);font-size:.7rem;text-transform:uppercase;
  text-align:center;line-height:1.2;padding:14px;
  clip-path:polygon(50% 0%,61% 12%,80% 6%,80% 25%,98% 32%,88% 48%,98% 64%,80% 71%,80% 90%,61% 84%,50% 100%,39% 84%,20% 90%,20% 71%,2% 64%,12% 48%,2% 32%,20% 25%,20% 6%,39% 12%);
  width:96px;height:96px;display:flex;align-items:center;justify-content:center;
  transform:rotate(8deg);
}
.sticker-tag{
  position:absolute;bottom:-18px;left:-22px;
  background:var(--paper-0);color:var(--ink-900);border:2.5px solid var(--ink-900);
  font-family:var(--font-display);font-size:.85rem;text-transform:uppercase;
  padding:7px 14px;border-radius:8px;transform:rotate(-6deg);
  box-shadow:3px 3px 0 var(--ink-900);
}

/* ---------- Purple promo band (bottom CTA) ---------- */
.promo-band{
  background:linear-gradient(160deg, var(--purple-500), var(--purple-700));
  position:relative;overflow:hidden;border-radius:var(--radius);
  padding:52px 40px;color:var(--paper-0);
}
.promo-band .giant-text{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-size:clamp(6rem,18vw,11rem);
  color:transparent;-webkit-text-stroke:1.5px rgba(255,255,255,.16);
  white-space:nowrap;pointer-events:none;text-transform:uppercase;letter-spacing:.02em;
}
.promo-band .content{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:20px;}
.promo-band h2, .promo-band h3, .promo-band h4{color:var(--paper-0);}
.promo-band p{color:rgba(255,255,255,.85);}
.promo-band .starburst{
  position:absolute;top:-18px;right:6%;
  background:var(--green-500);color:var(--ink-900);
  font-family:var(--font-display);font-size:.68rem;text-transform:uppercase;
  text-align:center;line-height:1.15;padding:12px;
  clip-path:polygon(50% 0%,61% 12%,80% 6%,80% 25%,98% 32%,88% 48%,98% 64%,80% 71%,80% 90%,61% 84%,50% 100%,39% 84%,20% 90%,20% 71%,2% 64%,12% 48%,2% 32%,20% 25%,20% 6%,39% 12%);
  width:84px;height:84px;display:flex;align-items:center;justify-content:center;
  transform:rotate(-10deg);z-index:2;
}

@media (max-width:860px){
  .doodle{display:none;}
  .promo-band .giant-text{display:none;}
  .promo-band .content{flex-direction:column;align-items:flex-start;}
}