/* =====================================================================
   OLIVEION — shared design system
   Hard carbon from Saudi olive seed, for sodium-ion batteries.

   Palette story:
   - carbon  : the engineered hard-carbon material (warm near-black)
   - sand     : olive-grove / desert soil (warm light surface)
   - olive    : the origin (the grove)
   - sodium   : the 589 nm glow sodium emits — the signature accent

   Edit the variables in :root and the whole site updates.
   ===================================================================== */

:root {
  /* --- color --- */
  --carbon:        #14110d;   /* deep warm black (dark sections, text) */
  --carbon-2:      #211b14;   /* slightly lifted carbon (dark cards) */
  --ink:           #2a241b;   /* body text on light */
  --ink-soft:      #5c5345;   /* secondary text on light */

  --sand:          #f2ecdd;   /* primary light surface */
  --sand-2:        #e8dcc4;   /* panels / cards on light */
  --sand-line:     #d8c9ab;   /* hairline dividers on light */

  --olive:         #6c7a40;   /* origin green */
  --olive-deep:    #444d28;   /* deep olive for text accents */

  --sodium:        #f0a02b;   /* signature amber (sodium glow) */
  --sodium-soft:   #f6c068;   /* lighter amber for fills/grids */
  --ember:         #ff7a2f;   /* hot ember — use VERY sparingly */

  --on-dark:       #ece3d2;   /* warm off-white text on carbon */
  --on-dark-soft:  #a99d86;   /* secondary text on carbon */

  /* --- type --- */
  --display: "Archivo", system-ui, sans-serif;
  --body:    "IBM Plex Sans", system-ui, sans-serif;
  --mono:    "IBM Plex Mono", ui-monospace, monospace;

  /* --- layout --- */
  --wrap: 1180px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --radius: 4px;          /* small, engineered — not soft/bubbly */
  --radius-lg: 10px;

  /* small inline check used by the characteristics list */
  --check: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ece3d2' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='4 12 10 18 20 6'/%3E%3C/svg%3E");
}

/* ---------- reset-ish ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--sand);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3, h4 { font-family: var(--display); font-weight: 700; line-height: 1.05; margin: 0; }

/* ---------- shared layout helpers ---------- */
.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }

.section { padding-block: clamp(4rem, 9vw, 7rem); }
.section--tight { padding-block: clamp(2.75rem, 6vw, 4rem); }
.section--carbon { background: var(--carbon); color: var(--on-dark); }
.section--carbon h1, .section--carbon h2, .section--carbon h3 { color: var(--on-dark); }
.section--olive  { background: var(--olive-deep); color: var(--on-dark); }
.section--olive h2 { color: var(--on-dark); }

/* eyebrow label — the mono "datasheet" voice */
.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--olive);
  margin: 0 0 1.1rem;
}
.section--carbon .eyebrow,
.section--olive .eyebrow { color: var(--sodium); }

.lede { font-size: clamp(1.05rem, 1.6vw, 1.25rem); color: var(--ink-soft); max-width: 56ch; }
.section--carbon .lede { color: var(--on-dark-soft); }

/* type scale */
.h-hero { font-size: clamp(2.6rem, 7vw, 5rem); letter-spacing: -0.02em; }
.h-sec  { font-size: clamp(1.9rem, 4vw, 3rem); letter-spacing: -0.015em; }
.h-card { font-size: 1.25rem; letter-spacing: -0.01em; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-family: var(--mono); font-size: 0.82rem; font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  text-decoration: none; cursor: pointer;
  transition: transform .15s ease, background .2s ease, color .2s ease, border-color .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn .arrow { transition: transform .2s ease; }
.btn:hover .arrow { transform: translateX(3px); }

.btn--amber { background: var(--sodium); color: var(--carbon); }
.btn--amber:hover { background: var(--sodium-soft); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--sand-line); }
.btn--ghost:hover { border-color: var(--olive); color: var(--olive-deep); }
.section--carbon .btn--ghost { color: var(--on-dark); border-color: rgba(236,227,210,.28); }
.section--carbon .btn--ghost:hover { border-color: var(--sodium); color: var(--sodium); }

/* ---------- top utility bar + nav (two tiers) ---------- */
.topbar {
  background: var(--carbon);
  color: var(--on-dark-soft);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}
.topbar .wrap { display: flex; justify-content: space-between; align-items: center; padding-block: 0.45rem; }
.topbar a { color: var(--on-dark-soft); text-decoration: none; }
.topbar a:hover { color: var(--sodium); }
.topbar .dot { color: var(--sodium); }

.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--sand) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--sand-line);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; padding-block: 0.9rem; gap: 1rem; }

/* wordmark */
.brand { display: inline-flex; align-items: baseline; gap: 0.06em; text-decoration: none; font-family: var(--display); font-weight: 800; font-size: 1.35rem; letter-spacing: -0.01em; color: var(--ink); }
.brand .ion { color: var(--sodium); }
.brand .seed { width: 11px; height: 11px; border-radius: 50% 50% 50% 0; background: var(--olive); transform: rotate(45deg); margin-right: 0.5rem; align-self: center; }

.nav-links { display: flex; align-items: center; gap: 1.6rem; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  font-family: var(--mono); font-size: 0.82rem; letter-spacing: 0.03em;
  text-decoration: none; color: var(--ink); padding: 0.3rem 0; position: relative;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 2px; width: 0;
  background: var(--sodium); transition: width .22s ease;
}
.nav-links a:hover::after, .nav-links a[aria-current="page"]::after { width: 100%; }
.nav-links a[aria-current="page"] { color: var(--olive-deep); }

.nav-cta { display: inline-flex; }
.nav-toggle { display: none; background: none; border: 1.5px solid var(--sand-line); border-radius: var(--radius); padding: 0.5rem 0.6rem; cursor: pointer; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--ink); margin: 4px 0; transition: .2s; }

/* ---------- HERO (dark) ---------- */
.hero { position: relative; background: var(--carbon); color: var(--on-dark); overflow: hidden; }
/* sodium glow — the atmospheric signature */
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(60% 70% at 78% 18%, rgba(240,160,43,.20), transparent 60%),
    radial-gradient(50% 60% at 12% 95%, rgba(108,122,64,.18), transparent 60%);
  pointer-events: none;
}
.hero .wrap { position: relative; padding-block: clamp(4rem, 10vw, 7.5rem); }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.hero h1 { color: var(--on-dark); }
.hero .accent { color: var(--sodium); }
.hero p.lede { color: var(--on-dark-soft); margin-block: 1.5rem 2rem; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 0.9rem; }

/* tiny stat row under hero copy */
.hero-stats { display: flex; gap: 2.2rem; margin-top: 2.6rem; flex-wrap: wrap; }
.hero-stats .s { display: flex; flex-direction: column; }
.hero-stats .num { font-family: var(--display); font-weight: 700; font-size: 1.9rem; color: var(--sodium); line-height: 1; }
.hero-stats .lbl { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--on-dark-soft); margin-top: 0.5rem; }

/* ---------- PROVENANCE STRIP (signature) ---------- */
.provenance { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border: 1px solid var(--sand-line); border-radius: var(--radius-lg); overflow: hidden; background: var(--sand); }
.section--carbon .provenance { border-color: rgba(236,227,210,.16); background: var(--carbon-2); }
.prov-step { padding: 1.6rem 1.3rem 1.5rem; position: relative; }
.prov-step + .prov-step { border-left: 1px solid var(--sand-line); }
.section--carbon .prov-step + .prov-step { border-left-color: rgba(236,227,210,.16); }
.prov-step .stage { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--sodium); }
.prov-step h3 { font-size: 1.05rem; margin: 0.8rem 0 0.35rem; }
.prov-step p { font-size: 0.9rem; color: var(--ink-soft); margin: 0; }
.section--carbon .prov-step p { color: var(--on-dark-soft); }
.prov-art { width: 64px; height: 64px; margin-bottom: 1rem; }

/* ---------- feature cards ---------- */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.25rem; }
.card { background: var(--sand-2); border: 1px solid var(--sand-line); border-radius: var(--radius-lg); padding: 1.8rem 1.6rem; transition: transform .2s ease, border-color .2s ease; }
.card:hover { transform: translateY(-4px); border-color: var(--olive); }
.card .ic { width: 40px; height: 40px; color: var(--olive); margin-bottom: 1.1rem; }
.card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
.card p { margin: 0; color: var(--ink-soft); font-size: 0.97rem; }
.card .num-tag { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.12em; color: var(--sodium); display: block; margin-bottom: 0.9rem; }

/* ---------- stat band (dark) ---------- */
.stat-band { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 2rem 1.5rem; }
.stat { border-left: 2px solid var(--sodium); padding-left: 1.1rem; }
.stat .num { font-family: var(--display); font-weight: 700; font-size: clamp(2rem, 4vw, 2.9rem); color: var(--on-dark); line-height: 1; }
.stat .unit { color: var(--sodium); font-size: 0.6em; }
.stat .lbl { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--on-dark-soft); margin-top: 0.7rem; }

/* ---------- two-column generic ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
.split--wide-left { grid-template-columns: 1.2fr 0.8fr; }

/* ---------- datasheet spec list (product page) ---------- */
.spec-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--sand-line); }
.spec-list li { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 1rem; padding: 0.95rem 0; border-bottom: 1px solid var(--sand-line); }
.spec-list .k { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-soft); }
.spec-list .v { font-weight: 500; }
.spec-list .v small { display: block; font-weight: 400; color: var(--ink-soft); font-size: 0.85rem; }

/* characteristics list */
.char-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.4rem; }
.char-list li { padding-left: 2.4rem; position: relative; }
.char-list li::before {
  content: ""; position: absolute; left: 0; top: 0.15rem;
  width: 1.5rem; height: 1.5rem; border-radius: var(--radius);
  background: var(--olive); -webkit-mask: var(--check) center / 60% no-repeat; mask: var(--check) center / 60% no-repeat;
}
.char-list h3 { font-size: 1.05rem; margin-bottom: 0.25rem; }
.char-list p { margin: 0; color: var(--ink-soft); font-size: 0.97rem; }

/* ---------- graph panels (dark instrument) ---------- */
.graph-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.25rem; }
.graph-card { background: var(--carbon-2); border: 1px solid rgba(236,227,210,.14); border-radius: var(--radius-lg); padding: 1.4rem 1.3rem 1.1rem; }
.graph-card h3 { color: var(--on-dark); font-size: 1.02rem; }
.graph-card .cap { font-family: var(--mono); font-size: 0.72rem; color: var(--on-dark-soft); margin: 0.35rem 0 1rem; letter-spacing: 0.03em; }
.graph-card svg { width: 100%; height: auto; }
.legend { display: flex; gap: 1.1rem; flex-wrap: wrap; font-family: var(--mono); font-size: 0.7rem; color: var(--on-dark-soft); margin-top: 0.7rem; }
.legend .key { display: inline-flex; align-items: center; gap: 0.4rem; }
.legend .swatch { width: 14px; height: 3px; border-radius: 2px; }

/* product image frame */
.product-frame { background: var(--carbon); border-radius: var(--radius-lg); padding: 2rem; position: relative; overflow: hidden; aspect-ratio: 4/3; display: grid; place-items: center; }
.product-frame::before { content: ""; position: absolute; inset: 0; background: radial-gradient(60% 60% at 50% 40%, rgba(240,160,43,.22), transparent 65%); }
.product-frame svg { position: relative; width: 70%; }
.frame-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.frame-tag { position: absolute; left: 0.9rem; bottom: 0.9rem; font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.1em; color: var(--on-dark); text-transform: uppercase; background: rgba(20,17,13,.72); padding: 0.32rem 0.6rem; border-radius: 7px; }

/* image placeholder helper (where the user drops a real photo / SEM) */
.placeholder { border: 1px dashed var(--sand-line); border-radius: var(--radius-lg); padding: 2rem; text-align: center; color: var(--ink-soft); font-family: var(--mono); font-size: 0.8rem; background: var(--sand-2); }

/* ---------- people / founders ---------- */
.founders { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(2.5rem, 6vw, 5rem); max-width: 880px; margin: 0 auto; }
.founder { display: flex; flex-direction: column; align-items: center; text-align: center; }
.founder-photo { width: clamp(140px, 18vw, 176px); aspect-ratio: 1 / 1; border-radius: 50%; overflow: hidden; display: grid; place-items: center; background: radial-gradient(circle at 50% 36%, var(--sand) 0%, var(--sand-2) 72%); border: 1px solid var(--sand-line); color: var(--olive); margin-bottom: 1.5rem; }
.founder-photo svg { width: 56%; height: auto; }
.founder-photo img { width: 100%; height: 100%; object-fit: cover; }
.founder-role { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--olive); margin: 0 0 0.5rem; }
.founder-name { font-size: clamp(1.3rem, 2.2vw, 1.6rem); letter-spacing: -0.01em; margin: 0 0 0.9rem; padding-bottom: 0.9rem; position: relative; }
.founder-name::after { content: ""; position: absolute; left: 50%; bottom: 0; transform: translateX(-50%); width: 36px; height: 2px; background: var(--sodium); border-radius: 2px; }
.founder-bio { color: var(--ink-soft); font-size: 0.98rem; line-height: 1.6; max-width: 34ch; margin: 0 0 1.5rem; }
.founder-link { display: inline-flex; align-items: center; gap: 0.5rem; font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--olive-deep); text-decoration: none; border: 1px solid var(--sand-line); border-radius: 999px; padding: 0.5rem 1.1rem; transition: border-color .2s ease, color .2s ease, background .2s ease; }
.founder-link:hover { border-color: var(--olive); color: var(--olive); background: var(--sand-2); }
.founder-link svg { width: 15px; height: 15px; }
@media (max-width: 620px) { .founders { grid-template-columns: 1fr; max-width: 380px; } }

/* ---------- breadcrumb ---------- */
.crumb { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.06em; color: var(--ink-soft); padding-block: 1.4rem 0; }
.crumb a { text-decoration: none; color: var(--ink-soft); }
.crumb a:hover { color: var(--olive); }
.crumb .sep { color: var(--sand-line); margin-inline: 0.5rem; }

/* ---------- contact form ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 0.85fr; gap: 0; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--sand-line); }
.contact-form { padding: clamp(1.8rem, 4vw, 3rem); background: var(--sand); }
.contact-aside { padding: clamp(1.8rem, 4vw, 3rem); background: var(--carbon); color: var(--on-dark); position: relative; overflow: hidden; }
.contact-aside::before { content: ""; position: absolute; inset: 0; background: radial-gradient(70% 60% at 80% 10%, rgba(240,160,43,.18), transparent 60%); pointer-events: none; }
.contact-aside h3 { color: var(--on-dark); position: relative; }
.contact-aside .row { position: relative; margin-top: 1.6rem; }
.contact-aside .row .k { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--sodium); }
.contact-aside .row .v { margin-top: 0.3rem; color: var(--on-dark); }
.contact-aside a { color: var(--on-dark); text-decoration: none; border-bottom: 1px solid rgba(240,160,43,.5); }

.field { margin-bottom: 1.15rem; }
.field label { display: block; font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft); margin-bottom: 0.45rem; }
.field input, .field select, .field textarea {
  width: 100%; font-family: var(--body); font-size: 1rem; color: var(--ink);
  background: var(--sand-2); border: 1.5px solid var(--sand-line); border-radius: var(--radius);
  padding: 0.75rem 0.85rem; transition: border-color .15s ease, box-shadow .15s ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--olive); box-shadow: 0 0 0 3px rgba(108,122,64,.18);
}
.field textarea { resize: vertical; min-height: 130px; }
.form-note { font-family: var(--mono); font-size: 0.72rem; color: var(--ink-soft); margin-top: 0.5rem; }

/* ---------- footer ---------- */
.footer { background: var(--carbon); color: var(--on-dark-soft); padding-block: clamp(3rem, 6vw, 4.5rem) 2rem; }
.footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 2rem; }
.footer h4 { font-family: var(--mono); font-weight: 500; font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--sodium); margin-bottom: 1rem; }
.footer a { color: var(--on-dark-soft); text-decoration: none; display: block; padding: 0.28rem 0; font-size: 0.92rem; }
.footer a:hover { color: var(--on-dark); }
.footer .brand { color: var(--on-dark); margin-bottom: 0.8rem; }
.footer .tag { font-size: 0.92rem; max-width: 34ch; }
.footer .base { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; margin-top: 2.5rem; padding-top: 1.4rem; border-top: 1px solid rgba(236,227,210,.14); font-family: var(--mono); font-size: 0.72rem; }

/* ---------- scroll reveal ---------- */
/* Content is visible by default. Only when JS is active (html.js) do we hide it
   first and fade it in — so the site is fully readable with JS disabled. */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------- focus visibility (a11y floor) ---------- */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--sodium); outline-offset: 2px; border-radius: 2px;
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero-grid, .split, .split--wide-left, .contact-grid { grid-template-columns: 1fr; }
  .provenance { grid-template-columns: 1fr 1fr; }
  .prov-step + .prov-step { border-left: none; }
  .prov-step:nth-child(odd) { border-right: 1px solid var(--sand-line); }
  .prov-step:nth-child(-n+2) { border-bottom: 1px solid var(--sand-line); }
  .footer .cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .nav-links, .nav-cta { display: none; }
  .nav-links.open { display: flex; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: flex-start; gap: 0.3rem; background: var(--sand); border-bottom: 1px solid var(--sand-line); padding: 1rem var(--gutter) 1.4rem; }
  .nav-toggle { display: block; }
  .provenance { grid-template-columns: 1fr; }
  .prov-step:nth-child(odd) { border-right: none; }
  .prov-step + .prov-step { border-top: 1px solid var(--sand-line); }
  .footer .cols { grid-template-columns: 1fr; }
  .topbar .hide-sm { display: none; }
}

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


/* home: 3-step provenance variant */
.provenance--3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) {
  .provenance--3 { grid-template-columns: repeat(3, 1fr); }
  .provenance--3 .prov-step + .prov-step { border-left: 1px solid rgba(236,227,210,.16); border-top: none; }
  .provenance--3 .prov-step:nth-child(odd) { border-right: none; }
  .provenance--3 .prov-step:nth-child(-n+2) { border-bottom: none; }
}
@media (max-width: 680px) {
  .provenance--3 { grid-template-columns: 1fr; }
  .provenance--3 .prov-step + .prov-step { border-left: none; border-top: 1px solid rgba(236,227,210,.16); }
}

/* hero secondary button — visible on dark hero */
.hero .btn--ghost { color: var(--on-dark); border-color: rgba(236,227,210,.45); }
.hero .btn--ghost:hover { border-color: var(--sodium); color: var(--sodium); }

/* bold key column (home applications list) */
.spec-list--bold .k { font-weight: 700; color: var(--ink); }

/* inline media image */
.media { width: 100%; border-radius: var(--radius-lg); display: block; object-fit: cover; aspect-ratio: 4 / 3; }

/* contact form: status message + disabled button */
.form-status { margin-top: 0.9rem; font-size: 0.92rem; line-height: 1.5; }
.form-status:empty { margin: 0; }
.form-status.is-sending { color: var(--ink-soft); }
.form-status.is-success { color: var(--olive-deep); font-weight: 600; }
.form-status.is-error { color: #b4462f; }
.btn:disabled { opacity: 0.55; cursor: default; }
.btn:disabled:hover { transform: none; }