/* =========================================================
   USDA PROBE — Cold treatment instrumentation
   Design tokens
   ========================================================= */
:root{
  --frost:      #F4F7F8;
  --frost-alt:  #EAF0F2;
  --navy:       #0F1F2C;
  --navy-soft:  #16314A;
  --steel:      #5C6B78;
  --steel-line: #D7E1E5;
  --reefer:     #1C7293;
  --reefer-dim: #14536A;
  --amber:      #D98B2E;
  --amber-soft: #F2D9B8;
  --white:      #FFFFFF;
  --good:       #3E8C5A;

  --display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --body:    "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --mono:    "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --maxw: 1180px;
  --radius: 3px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

body{
  margin:0;
  font-family: var(--body);
  color: var(--navy);
  background: var(--frost);
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
}

h1,h2,h3{
  font-family: var(--display);
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
  color: var(--navy);
}

a{ color: var(--reefer); text-decoration: none; }
a:hover{ text-decoration: underline; }

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible{
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.container{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* =========================================================
   Header
   ========================================================= */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--navy);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.nav{
  display:flex;
  align-items:center;
  justify-content: space-between;
  height: 68px;
}
.logo{
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  color: var(--white);
  display:flex;
  align-items:baseline;
  gap: 6px;
}
.logo .unit{ color: var(--amber); font-size: 0.65em; letter-spacing: 0.14em; font-family: var(--mono); }
.logo small{
  display:block;
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.18em;
  color: var(--steel-line);
  font-weight: 400;
  margin-top: 2px;
}

.nav-links{
  display:flex;
  align-items:center;
  gap: 28px;
}
.nav-links a{
  color: rgba(255,255,255,0.82);
  font-size: 0.92rem;
  font-weight: 500;
}
.nav-links a:hover{ color: var(--white); text-decoration: none; }

.lang-switch{
  display:flex;
  align-items:center;
  gap: 4px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 999px;
  padding: 3px;
  font-family: var(--mono);
  font-size: 0.72rem;
}
.lang-switch a{
  padding: 5px 11px;
  border-radius: 999px;
  color: rgba(255,255,255,0.6);
}
.lang-switch a.active{
  background: var(--amber);
  color: var(--navy);
  font-weight: 600;
}
.lang-switch a:hover{ text-decoration: none; color: var(--white); }

.nav-toggle{
  display:none;
  background:none;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: var(--radius);
  color: var(--white);
  width: 40px;
  height: 36px;
  font-size: 1.1rem;
  cursor: pointer;
}

@media (max-width: 760px){
  .nav-links{
    position: absolute;
    top: 68px; left:0; right:0;
    background: var(--navy);
    flex-direction: column;
    align-items: flex-start;
    padding: 6px 24px 18px;
    gap: 14px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    display:none;
  }
  .nav-links.open{ display:flex; }
  .nav-toggle{ display:block; }
}

/* =========================================================
   Hero
   ========================================================= */
.hero{
  background: linear-gradient(180deg, var(--navy) 0%, var(--navy-soft) 100%);
  color: var(--white);
  padding: 72px 0 88px;
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
.eyebrow{
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 18px;
}
.hero h1{
  font-size: clamp(2rem, 4vw, 2.85rem);
  color: var(--white);
  line-height: 1.12;
  max-width: 19ch;
}
.hero .lead{
  font-size: 1.08rem;
  color: rgba(255,255,255,0.78);
  max-width: 46ch;
  margin: 18px 0 32px;
}
.cta-row{ display:flex; gap: 14px; flex-wrap: wrap; margin-bottom: 22px; }
.btn{
  display:inline-block;
  padding: 13px 22px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.94rem;
  border: 1px solid transparent;
}
.btn.primary{ background: var(--amber); color: var(--navy); }
.btn.primary:hover{ background: #c97e22; text-decoration:none; }
.btn.secondary{ border-color: rgba(255,255,255,0.35); color: var(--white); }
.btn.secondary:hover{ border-color: var(--white); text-decoration:none; }

.disclaimer{
  font-size: 0.78rem;
  color: rgba(255,255,255,0.45);
  max-width: 46ch;
}

/* --- Signature element: cold treatment readout panel --- */
.readout-card{
  background: #0A1620;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 6px;
  padding: 26px 26px 22px;
  box-shadow: 0 30px 60px -20px rgba(0,0,0,0.55);
}
.readout-label{
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel-line);
  display:flex;
  justify-content: space-between;
  margin-bottom: 14px;
}
.readout-label .dot{
  width:7px; height:7px; border-radius:50%;
  background: var(--good);
  display:inline-block; margin-right:6px;
  box-shadow: 0 0 0 3px rgba(62,140,90,0.18);
}
.readout-value{
  font-family: var(--mono);
  font-size: 3.1rem;
  font-weight: 500;
  color: var(--white);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.readout-value .deg{ color: var(--amber); }
.readout-meta{
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--steel-line);
  margin-top: 10px;
  display:flex;
  justify-content: space-between;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 12px;
}
.readout-meta b{ color: var(--white); font-weight: 600; }
.readout-note{
  font-size: 0.74rem;
  color: rgba(255,255,255,0.38);
  margin-top: 14px;
}

@media (max-width: 880px){
  .hero-grid{ grid-template-columns: 1fr; }
  .readout-card{ max-width: 420px; }
}

/* =========================================================
   Generic section scaffolding
   ========================================================= */
.section{ padding: 80px 0; }
.section.alt{ background: var(--frost-alt); }
.section.dark{ background: var(--navy); color: rgba(255,255,255,0.88); }
.section.dark h2{ color: var(--white); }
.section h2{
  font-size: clamp(1.5rem, 2.6vw, 1.9rem);
}
.kicker{
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--reefer);
  margin: 0 0 10px;
}
.section.dark .kicker{ color: var(--amber); }
.section-intro{
  max-width: 62ch;
  color: var(--steel);
  font-size: 1.02rem;
}
.section.dark .section-intro{ color: rgba(255,255,255,0.7); }

/* =========================================================
   Product / spec sheet
   ========================================================= */
.product-grid{
  display:grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 48px;
  align-items: start;
  margin-top: 38px;
}
.probe-diagram{
  background: var(--white);
  border: 1px solid var(--steel-line);
  border-radius: 6px;
  padding: 22px;
}
.probe-diagram svg{ width:100%; height:auto; display:block; }
.probe-diagram figcaption{
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--steel);
  margin-top: 10px;
  text-align:center;
}

.spec-sheet{ border-top: 1px solid var(--steel-line); }
.spec-row{
  display:grid;
  grid-template-columns: 130px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--steel-line);
}
.spec-row dt{
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--reefer-dim);
  font-weight: 600;
  margin: 0;
}
.spec-row dd{
  margin: 0;
  color: var(--navy);
}
.spec-row dd span.sub{ display:block; color: var(--steel); font-size:0.92rem; margin-top:3px; }

@media (max-width: 800px){
  .product-grid{ grid-template-columns: 1fr; }
  .spec-row{ grid-template-columns: 100px 1fr; }
}

/* =========================================================
   Applications
   ========================================================= */
.app-columns{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  margin-top: 36px;
}
.app-columns h3{
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--reefer-dim);
  margin-bottom: 14px;
}
.app-list{ list-style:none; margin:0; padding:0; }
.app-list li{
  display:flex;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid var(--steel-line);
  font-size: 0.98rem;
}
.app-list li svg{ flex:none; margin-top:3px; color: var(--reefer); }

@media (max-width: 700px){ .app-columns{ grid-template-columns: 1fr; } }

/* =========================================================
   Quality badges
   ========================================================= */
.badges{ display:flex; gap:10px; flex-wrap:wrap; margin-top: 28px; }
.badges span{
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  border: 1px solid var(--reefer);
  color: var(--reefer-dim);
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(28,114,147,0.06);
}

/* =========================================================
   FAQ
   ========================================================= */
.faq-list{ margin-top: 32px; border-top: 1px solid var(--steel-line); max-width: 78ch; }
.faq-item{ border-bottom: 1px solid var(--steel-line); }
.faq-item summary{
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.04rem;
  padding: 18px 4px;
  cursor: pointer;
  list-style: none;
  display:flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: var(--navy);
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary .ind{
  font-family: var(--mono);
  color: var(--reefer);
  font-size: 1.3rem;
  line-height: 1;
  flex: none;
}
.faq-item[open] summary .ind::before{ content:"–"; }
.faq-item:not([open]) summary .ind::before{ content:"+"; }
.faq-item .faq-answer{
  padding: 0 4px 20px;
  color: var(--steel);
  max-width: 70ch;
}

/* =========================================================
   Testimonials
   ========================================================= */
.testimonial-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 36px;
}
.testimonial{
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 6px;
  padding: 26px 24px;
}
.testimonial p.quote{
  font-size: 1rem;
  color: rgba(255,255,255,0.9);
  margin: 0 0 18px;
}
.testimonial .who{
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--amber);
}
.testimonial .placeholder-tag{
  display:inline-block;
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
  border: 1px dashed rgba(255,255,255,0.25);
  padding: 3px 8px;
  border-radius: 3px;
}
@media (max-width: 880px){ .testimonial-grid{ grid-template-columns: 1fr; } }

/* =========================================================
   Contact
   ========================================================= */
.contact-box{
  display:grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.contact-box .email-btn{
  display:inline-block;
  font-family: var(--mono);
  font-size: 1.1rem;
  color: var(--white);
  background: var(--reefer);
  padding: 16px 22px;
  border-radius: var(--radius);
  margin-top: 8px;
}
.contact-box .email-btn:hover{ background: var(--reefer-dim); text-decoration:none; }
.contact-meta{ margin-top: 22px; font-size: 0.9rem; color: rgba(255,255,255,0.6); }
.contact-meta dt{ font-family: var(--mono); font-size:0.7rem; letter-spacing:0.08em; color: var(--amber); margin-top:14px; }
.contact-meta dd{ margin: 2px 0 0; color: rgba(255,255,255,0.85); }

@media (max-width: 800px){ .contact-box{ grid-template-columns: 1fr; } }

/* =========================================================
   Footer
   ========================================================= */
footer{
  background: #0A1620;
  color: rgba(255,255,255,0.45);
  padding: 28px 0;
  font-size: 0.82rem;
}
.footer-grid{
  display:flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}