/* =========================================================
   iTRACE Medical — stylesheet
   Palette, type and layout for the static clone.
   Recolor via the :root variables below to match brand.
   ========================================================= */

:root {
  --ink:        #0A1F33;   /* deep navy ink */
  --ink-2:      #0E2C47;
  --bg:         #FFFFFF;
  --bg-alt:     #F3F7FB;   /* cool off-white */
  --accent:     #ff9100;   /* detection orange */
  --accent-deep:#cc7400;
  --accent-soft:#ffe7cc;
  --line:       #E1E9F1;
  --muted:      #566B7D;
  --on-dark:    #EAF2F8;
  --on-dark-mut:#9DB4C6;

  --font-display: "Teachers", system-ui, sans-serif;
  --font-body:    "Teachers", system-ui, sans-serif;
  --font-mono:    "IBM Plex Mono", ui-monospace, monospace;

  --wrap: 1160px;
  --radius: 4px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; font-size: 14pt; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  padding: 13px 24px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, background .2s ease, color .2s ease, border-color .2s ease;
}
.btn-primary {
  background: var(--accent);
  color: #04252a;
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-deep); border-color: var(--accent-deep); color: #fff; }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-deep); }
.btn-block { width: 100%; }
.btn:active { transform: translateY(1px); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: #ffffff;
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.brand-logo { height: 42px; width: auto; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.site-nav a {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--ink);
  transition: color .2s ease;
}
.site-nav a:hover { color: var(--accent-deep); }
.nav-cta {
  background: var(--ink);
  color: #fff !important;
  padding: 10px 20px;
  border-radius: var(--radius);
}
.nav-cta:hover { background: var(--accent-deep); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 26px; height: 2px;
  background: var(--ink);
  transition: transform .25s ease, opacity .2s ease;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--on-dark);
  padding: 110px 0 120px;
}
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,145,0,0.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,145,0,0.10) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 40%, transparent 100%);
}
.hero-inner {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 26px;
}
.eyebrow .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 rgba(255,145,0,0.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(255,145,0,0.6); }
  70%  { box-shadow: 0 0 0 10px rgba(255,145,0,0); }
  100% { box-shadow: 0 0 0 0 rgba(255,145,0,0); }
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 4.3vw, 3.3rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 28px;
  color: #fff;
}

/* Rotating detection word — inline, no box */
.detector-word {
  font-family: var(--font-display);
  color: var(--accent);
  font-weight: 700;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
/* Each letter swings open on its vertical axis; combined with the
   staggered delay in script.js this reads as a wave rolling left to right */
.flip-letter {
  display: inline-block;
  transform-origin: 50% 50%;
  backface-visibility: hidden;
  animation: flipIn .5s cubic-bezier(.2,.7,.3,1) both;
}
@keyframes flipIn {
  0%   { transform: rotateY(-90deg); opacity: 0; }
  60%  { opacity: 1; }
  100% { transform: rotateY(0deg);   opacity: 1; }
}

.hero-sub {
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  color: var(--on-dark-mut);
  max-width: none;
  margin: 0 auto 36px;
}

/* ---------- Generic section ---------- */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--ink); color: var(--on-dark); }

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin: 0 0 14px;
}
.section-eyebrow.light { color: var(--accent); }

.section-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  color: var(--ink);
}
.section-title.on-dark { color: #fff; }

.lede { font-size: 1.15rem; color: var(--accent-deep); font-weight: 500; margin: 0; }
.dark-lede { font-size: 1.15rem; color: var(--on-dark-mut); max-width: 560px; }

/* ---------- What grid ---------- */
.what-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 60px;
  align-items: start;
}
.title-accent { color: var(--accent); }
.what-left { text-align: center; align-self: center; }
.what-heading {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 18px;
}
.what-right p { margin: 0 0 18px; color: var(--muted); font-size: 1.05rem; }
.what-right p:last-child { margin-bottom: 0; }

/* ---------- Why list ---------- */
.why-list {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.08);
}
.why-list li {
  background: var(--ink);
  padding: 34px 30px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: background .2s ease;
}
.why-list li:hover { background: var(--ink-2); }
.why-index { color: var(--accent); font-family: var(--font-mono); font-size: 1.2rem; line-height: 1.2; }
.why-list h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.2rem;
  line-height: 1.3;
  margin: 0;
  color: #fff;
}

/* ---------- Cards ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 44px;
}
.card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px 26px;
  background: var(--bg);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px -24px rgba(10,31,51,0.35);
  border-color: var(--accent);
}
.card-scan {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transform: translateX(-100%);
}
.card:hover .card-scan { animation: scan 1.4s ease forwards; }
@keyframes scan { to { transform: translateX(100%); } }

.card-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin: 0 0 12px;
}
.card h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  line-height: 1.25;
  margin: 0 0 12px;
  color: var(--ink);
}
.card p { color: var(--muted); font-size: 0.98rem; margin: 0 0 22px; }
.card-link {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--accent-deep);
  font-size: 0.95rem;
}
.card-link span { transition: margin .2s ease; display: inline-block; }
.card-link:hover span { margin-left: 5px; }

/* ---------- Two column (pillars + expertise) ---------- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}
.pillars { list-style: none; margin: 32px 0 24px; padding: 0; counter-reset: none; }
.pillars li {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.15rem;
  color: var(--ink);
}
.pillars li:last-child { border-bottom: 1px solid var(--line); }
.pillar-num { font-family: var(--font-mono); color: var(--accent-deep); font-size: 0.9rem; }

.expertise {
  list-style: none;
  margin: 32px 0 24px;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.expertise li {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  font-family: var(--font-display);
  font-weight: 500;
  background: var(--bg);
  position: relative;
  padding-left: 38px;
}
.expertise li::before {
  content: "";
  position: absolute;
  left: 18px; top: 50%;
  width: 7px; height: 7px;
  transform: translateY(-50%);
  background: var(--accent);
}
.note { color: var(--muted); font-size: 0.98rem; margin: 0; }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.contact-form { display: grid; gap: 18px; }
.field { display: grid; gap: 7px; }
.field label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--on-dark-mut);
}
.field input,
.field textarea {
  font-family: var(--font-body);
  font-size: 1rem;
  color: #fff;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--radius);
  padding: 13px 15px;
  resize: vertical;
  transition: border-color .2s ease, background .2s ease;
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(255,145,0,0.08);
}
.form-status { font-family: var(--font-mono); font-size: 0.85rem; margin: 4px 0 0; color: var(--accent); min-height: 1em; }

/* ---------- Footer ---------- */
.site-footer {
  background: #061422;
  color: var(--on-dark-mut);
  padding: 40px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-logo { height: 34px; width: auto; filter: brightness(0) invert(1); opacity: 0.9; }
.footer-inner p { margin: 0; font-family: var(--font-mono); font-size: 0.85rem; }
.footer-nav { display: flex; gap: 22px; }
.footer-nav a { font-family: var(--font-display); font-size: 0.9rem; color: var(--on-dark); }
.footer-nav a:hover { color: var(--accent); }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .what-grid, .two-col, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .why-list { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }

  .nav-toggle { display: flex; }
  .site-nav {
    position: absolute;
    top: 76px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 8px 24px 20px;
    transform: translateY(-140%);
    transition: transform .3s ease;
    box-shadow: 0 20px 30px -20px rgba(10,31,51,0.3);
  }
  .site-nav.open { transform: translateY(0); }
  .site-nav a { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav-cta { text-align: center; margin-top: 12px; border: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

@media (max-width: 520px) {
  .expertise { grid-template-columns: 1fr; }
  .hero { padding: 80px 0 90px; }
  .section { padding: 66px 0; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}