/* ========================================================================== 
   LISN corporate website — refined production stylesheet
   Desktop geometry follows the supplied 1920px Figma export.
   ========================================================================== */

:root {
  --bg-light: #f5f6f1;
  --bg-dark: #141f27;
  --bg-dark-deep: #081116;
  --bg-footer: #1b1f24;
  --text: #22272b;
  --muted: #596168;
  --white-muted: rgba(255, 255, 255, .70);
  --mint: #49ddc0;
  --mint-dark: #119278;
  --blue: #173877;
  --line: #d9ddd9;
  --font: Inter, Pretendard, "Noto Sans", Arial, sans-serif;
  --container: 1280px;
  --header-h: 64px;
  --ease: cubic-bezier(.16, 1, .3, 1);
  --dur-fast: .35s;
  --dur-mid: .72s;
  --dur-slow: 1.1s;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background: var(--bg-light);
  font-family: var(--font);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-wrap: break-word;
}
body.is-menu-open { overflow: hidden; overscroll-behavior: none; }
img, svg, video { display: block; max-width: 100%; }
ul, ol { list-style: none; padding: 0; margin: 0; }
h1, h2, h3, h4, h5, p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { border: 0; padding: 0; font: inherit; color: inherit; background: none; cursor: pointer; }

.container {
  width: min(var(--container), calc(100% - 80px));
  margin-inline: auto;
}

.eyebrow {
  margin-bottom: 12px;
  color: var(--mint-dark);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.2;
}
.eyebrow--light { color: var(--mint); }
.section-heading {
  text-wrap: balance;
  color: var(--text);
  font-size: 32px;
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -.025em;
}
.section-heading--light { color: #fff; }
.section-sub {
  text-wrap: pretty;
  margin-top: 16px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.55;
}
.section-sub--light { color: var(--white-muted); }
.text-gradient-mint {
  color: var(--mint);
  background: linear-gradient(90deg, #65efd4, #42d9bb);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Header */
.gnb {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  height: var(--header-h);
  color: #fff;
  background: transparent;
  transition: background var(--dur-fast) var(--ease), backdrop-filter var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.gnb.is-scrolled {
  background: rgba(3, 8, 11, .72);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(255,255,255,.08);
}
.gnb__inner {
  position: relative;
  z-index: 2;
  width: min(var(--container), calc(100% - 80px));
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.gnb__logo img { width: 69px; height: auto; }
.gnb__nav ul { display: flex; align-items: center; gap: 0; }
.gnb__nav li { display: flex; align-items: center; }
.gnb__nav li + li::before {
  content: "";
  width: 1px;
  height: 13px;
  margin: 0 28px;
  background: rgba(255,255,255,.38);
}
.gnb__nav a {
  position: relative;
  padding: 8px 0;
  color: rgba(255,255,255,.9);
  font-size: 13px;
  font-weight: 500;
}
.gnb__nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 1px;
  background: #fff;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-fast) var(--ease);
}
.gnb__nav a:hover::after, .gnb__nav a.is-active::after { transform: scaleX(1); }
.gnb__toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; flex-direction: column; gap: 5px; }
.gnb__toggle span { width: 24px; height: 2px; background: #fff; transition: .25s var(--ease); }
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 1;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  overflow-y: auto;
  background-color: #081116;
  background-image:
    radial-gradient(circle at 50% 8%, rgba(21, 62, 78, .34), transparent 42%),
    linear-gradient(180deg, #07131a 0%, #0b1a22 48%, #09151c 100%);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateZ(0);
  will-change: opacity;
  transition:
    opacity .68s var(--ease),
    visibility 0s linear .68s;
}
.mobile-nav::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8,17,22,.18), rgba(8,17,22,.46));
  pointer-events: none;
}
.mobile-nav.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition-delay: 0s;
}
.mobile-nav ul {
  position: relative;
  z-index: 1;
  padding: calc(var(--header-h) + 36px) 24px 48px;
}
.mobile-nav li {
  margin: 20px 0;
  text-align: center;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.mobile-nav.is-open li { opacity: 1; transform: translateY(0); }
.mobile-nav.is-open li:nth-child(1) { transition-delay: .10s; }
.mobile-nav.is-open li:nth-child(2) { transition-delay: .18s; }
.mobile-nav.is-open li:nth-child(3) { transition-delay: .26s; }
.mobile-nav.is-open li:nth-child(4) { transition-delay: .34s; }
.mobile-nav a { color: #fff; font-size: 28px; font-weight: 700; }
.gnb.is-menu-open {
  background: #081116;
  box-shadow: 0 1px 0 rgba(255,255,255,.08);
}

/* Hero — 1920 × 1080 reference */
.hero {
  position: relative;
  height: 1080px;
  max-height: 100svh;
  min-height: 720px;
  overflow: hidden;
  display: grid;
  place-items: center;
  background: #000;
}
.hero__media, .hero__overlay { position: absolute; inset: 0; }
.hero__video { width: 100%; height: 100%; object-fit: cover; }
.hero__overlay {
  background:
    radial-gradient(circle at 50% 46%, transparent 0 30%, rgba(0,0,0,.15) 58%, rgba(0,0,0,.62) 100%),
    linear-gradient(90deg, rgba(0,0,0,.44), transparent 28%, transparent 72%, rgba(0,0,0,.44));
}
.hero__content {
  position: relative;
  z-index: 1;
  width: min(974px, calc(100% - 48px));
  min-height: 209px;
  padding: 46px 52px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 20px;
  text-align: center;
  background: rgba(0,0,0,.20);
  -webkit-backdrop-filter: blur(1.5px);
  backdrop-filter: blur(1.5px);
}
.hero__headline {
  color: #fff;
  font-size: clamp(36px, 2.5vw, 48px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.035em;
  white-space: nowrap;
}
.hero__subtitle {
  max-width: 780px;
  margin-top: 26px;
  color: rgba(255,255,255,.86);
  font-size: 17px;
  line-height: 1.55;
}
.hero__scroll {
  position: absolute;
  z-index: 2;
  left: 50%;
  bottom: 70px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 9px;
  transform: translateX(-50%);
  color: #fff;
}
.hero__scroll-icon {
  width: 24px;
  height: 40px;
  padding-top: 7px;
  display: flex;
  justify-content: center;
  border: 1.5px solid rgba(255,255,255,.9);
  border-radius: 16px;
}
.hero__scroll-dot { width: 4px; height: 4px; border-radius: 50%; background: #fff; animation: scrollDot 1.6s var(--ease) infinite; }
.hero__scroll-label { font-size: 11px; letter-spacing: .02em; }

/* About LISN — 2860px desktop section */
.about-lisn {
  min-height: 2860px;
  padding: 142px 0 118px;
  color: #fff;
  background: linear-gradient(180deg, #141f27 0%, #233039 100%);
}
.about-lisn__head { margin-bottom: 122px; text-align: center; }
.about-lisn__intro {
  display: grid;
  grid-template-columns: 441px minmax(0, 1fr);
  gap: 40px;
  align-items: center;
  margin-bottom: 80px;
}
.about-lisn__intro-media { overflow: hidden; border-radius: 0; }
.about-lisn__intro-media img { width: 441px; height: 251px; object-fit: cover; }
.about-lisn__brand { color: #fff; font-size: 32px; font-weight: 800; line-height: 1.1; }
.about-lisn__desc { max-width: 730px; text-wrap: pretty; margin-top: 15px; color: var(--white-muted); font-size: 15px; line-height: 1.65; }
.about-lisn__highlight { margin-top: 24px; color: var(--mint); font-size: 16px; font-weight: 700; line-height: 1.5; }
.about-lisn__cards {
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 20px;
  background: rgba(6, 12, 16, .43);
}
.feature-card {
  min-height: 500px;
  padding: 70px 100px;
  display: grid;
  grid-template-columns: 387px minmax(0, 1fr);
  gap: 48px;
  align-items: center;
}
.feature-card__media { overflow: hidden; border-radius: 16px; }
.feature-card__img { width: 387px; height: 360px; object-fit: cover; }
.feature-card__label {
  display: inline-flex;
  padding: 5px 11px;
  border-radius: 5px;
  color: #fff;
  background: rgba(255,255,255,.19);
  font-size: 14px;
  line-height: 1;
}
.feature-card__title { margin-top: 13px; margin-bottom: 24px; color: #fff; font-size: 21px; font-weight: 500; line-height: 1.35; }
.check-list li { position: relative; margin-top: 13px; padding-left: 30px; color: rgba(255,255,255,.78); font-size: 14px; line-height: 1.45; }
.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 1px;
  width: 18px;
  height: 18px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #294940;
  background: #d2eee8;
  font-size: 11px;
  font-weight: 800;
}

/* Core technology — 966px desktop section */
.core-tech {
  min-height: 966px;
  padding: 126px 0 110px;
  background: var(--bg-light);
}
.core-tech__head { max-width: 720px; margin: 0 auto 80px; text-align: center; }
.core-tech__head .section-sub { margin-inline: auto; }
.tabs { --tab-accent: var(--mint-dark); }
.tabs.tabs--voice { --tab-accent: var(--blue); }
.tabs__list {
  position: relative;
  width: 420px;
  max-width: 100%;
  margin: 0 auto 36px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid #aeb4b3;
}
.tabs__btn {
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  color: #b4b7b5;
  font-size: 16px;
  font-weight: 600;
  transition: color var(--dur-fast) var(--ease);
}
.tabs__btn.is-active { color: var(--tab-accent); }
.tabs__icon { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: #bfc1c0; }
.tabs__icon svg { width: 17px; height: 17px; }
.tabs__btn.is-active .tabs__icon { background: var(--tab-accent); }
.tabs__btn:not(.is-active) .tabs__icon { color: #fff; }
.tabs__underline {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  background: var(--tab-accent);
  transition: transform var(--dur-mid) var(--ease), width var(--dur-mid) var(--ease), background var(--dur-mid) var(--ease);
}
.tabs__panel { display: none; }
.tabs__panel.is-active { display: block; animation: fadeSlideIn var(--dur-mid) var(--ease); }
.tech-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 24px; }
.tech-card {
  min-height: 386px;
  padding: 22px 24px 24px;
  border: 1px solid #bdc4c5;
  border-radius: 12px;
  background: #fff;
  transition: transform var(--dur-mid) var(--ease), box-shadow var(--dur-mid) var(--ease), border-color var(--dur-mid) var(--ease);
}
.tech-card:hover { transform: translateY(-5px); border-color: var(--tab-accent); box-shadow: 0 18px 40px rgba(15,30,40,.10); }
.tech-card__num { color: var(--tab-accent); font-size: 18px; font-weight: 800; line-height: 1.2; }
.tech-card__heading { min-height: 46px; margin-top: 5px; color: var(--tab-accent); font-size: 15px; font-weight: 700; line-height: 1.35; }
.tech-card__media {
  width: min(100%, 254px);
  aspect-ratio: 254 / 200;
  margin: 4px auto 18px;
  overflow: hidden;
  border-radius: 14px;
  background: #f7f7f5;
}
.tech-card__media-img { width: 100%; height: 100%; object-fit: contain; }
.tech-card__title { display: flex; align-items: center; gap: 9px; color: #2d3032; font-size: 16px; font-weight: 600; line-height: 1.25; }
.tech-card__icon { flex: 0 0 28px; width: 28px; height: 28px; display: grid; place-items: center; }
.tech-card__icon img { width: 28px; height: 28px; }
.tech-card__desc { margin-top: 12px; color: #3f4448; font-size: 14px; line-height: 1.45; }

/* Trust & validation — 1582px desktop section */
.trust {
  position: relative;
  min-height: 1582px;
  padding: 124px 0 116px;
  overflow: hidden;
  color: #fff;
  background: #000;
}
.trust__bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.trust__scrim { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(7,17,22,.58) 0%, rgba(7,13,16,.44) 42%, rgba(0,0,0,.92) 83%, #000 100%); }
.trust .container { position: relative; z-index: 1; }
.trust__head { max-width: 780px; margin: 0 auto 70px; text-align: center; }
.trust__head .section-sub { max-width: 720px; margin-inline: auto; }
.process {
  display: grid;
  grid-template-columns: 220px 24px 220px 24px 220px 24px 220px 24px 220px;
  align-items: center;
  justify-content: center;
  gap: 18px;
}
.process__step {
  width: 220px;
  height: 220px;
  padding: 30px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 26px;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 18px;
  background: rgba(3,13,19,.86);
  box-shadow: 0 8px 24px rgba(0,0,0,.25);
}
.process__icon { width: 70px; height: 70px; }
.process__icon img { width: 100%; height: 100%; }
.process__label { color: #fff; font-size: 22px; font-weight: 500; line-height: 1.25; text-align: center; }
.process__connector { width: 24px; display: grid; place-items: center; }
.process__connector img { width: 12px; height: 18px; }
.trust__connector {
  position: relative;
  height: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
}
.trust__connector::before {
  content: "";
  width: 1px;
  height: 188px;
  background: linear-gradient(180deg,
    rgba(255,255,255,0) 0%,
    #fff 12%,
    rgba(255,255,255,.92) 38%,
    rgba(255,255,255,.46) 72%,
    rgba(0,0,0,0) 100%);
  box-shadow: 0 0 7px rgba(255,255,255,.28);
}
.trust__connector img { display: none; }
.trust__connector-dot { width: 7px; height: 7px; margin-top: -2px; border-radius: 50%; background: #fff; box-shadow: 0 0 8px rgba(255,255,255,.45); }
.trust__lower {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  align-items: stretch;
  gap: 44px;
}
.trust__lower-title { margin-bottom: 26px; color: #fff; font-size: 22px; font-weight: 600; text-align: center; }
.clinical-evidence,
.clinical-performance {
  min-width: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
}
.evidence-list {
  min-height: 0;
  height: 100%;
  display: grid;
  grid-template-rows: repeat(4, minmax(112px, 1fr));
  gap: 20px;
}
.evidence-list__item { min-height: 0; padding: 0 30px; display: flex; align-items: center; justify-content: center; border: 1px solid rgba(255,255,255,.06); border-radius: 13px; background: rgba(255,255,255,.12); }
.evidence-list__head { display: flex; align-items: center; gap: 15px; color: #fff; font-size: 16px; font-weight: 500; }
.evidence-list__check { width: 22px; height: 22px; display: grid; place-items: center; border-radius: 50%; color: #294940; background: #d9eeea; font-size: 12px; font-weight: 800; }
.clinical-performance__inner {
  min-width: 0;
  min-height: 0;
  height: 100%;
  padding: 24px 22px 30px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 16px;
  background: #29363d;
}
.clinical-performance__card {
  flex: 0 0 auto;
  min-width: 0;
  width: 100%;
  height: auto;
  aspect-ratio: 1047 / 690;
  display: block;
  overflow: hidden;
  border-radius: 14px;
  background: #fff;
}
.clinical-performance__card img {
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  object-fit: contain;
  object-position: center;
}
.clinical-performance__stats {
  flex: 1 1 auto;
  min-height: 0;
  margin-top: 28px;
  padding-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
  border-top: 1px solid rgba(255,255,255,.32);
}
.stat { min-width: 0; padding: 0 16px; }
.stat + .stat { border-left: 1px solid rgba(255,255,255,.32); }
.stat__num { color: var(--mint); font-size: 34px; font-weight: 500; line-height: 1; }
.stat__label { margin-top: 9px; color: #fff; font-size: 16px; font-weight: 500; }
.stat__desc { margin-top: 11px; color: rgba(255,255,255,.62); font-size: 11px; line-height: 1.5; text-wrap: pretty; }

/* About us — 896px desktop section */
.about-us { min-height: 896px; padding: 136px 0 110px; background: var(--bg-light); }
.about-us__desc { max-width: 1240px; text-wrap: pretty; margin-top: 22px; color: #33393d; font-size: 15px; line-height: 1.7; }
.about-us__desc + .about-us__desc { margin-top: 20px; }
.timeline { position: relative; margin-top: 110px; display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 82px; }
.timeline::before { content: ""; position: absolute; top: 34px; left: 50%; width: 100vw; height: 2px; transform: translateX(-50%); background: linear-gradient(90deg, transparent, #8ac9ba 17%, #8ac9ba 83%, transparent); opacity: 0; transition: opacity .8s var(--ease); }
.timeline.is-grown::before { opacity: 1; }
.timeline__item { position: relative; }
.timeline__year { color: #2b3034; font-size: 16px; font-weight: 600; }
.timeline__dot { position: absolute; left: 0; top: 26px; z-index: 1; width: 20px; height: 20px; border: 5px solid var(--mint-dark); border-radius: 50%; background: #fff; }
.timeline__title { margin: 50px 0 18px; color: #282d31; font-size: 16px; font-weight: 700; line-height: 1.35; }
.timeline__list li { text-wrap: pretty; position: relative; margin-top: 5px; padding-left: 13px; color: #4d555b; font-size: 13px; line-height: 1.42; }
.timeline__list li::before { content: ""; position: absolute; left: 0; top: .62em; width: 4px; height: 4px; border-radius: 50%; background: #a6aaac; }

/* Contact & footer */
.contact { position: relative; min-height: 516px; padding: 132px 0 100px; overflow: hidden; color: #fff; background: var(--bg-dark-deep); }
.contact__bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 57%; opacity: .48; }
.contact__scrim { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(8,17,22,.68), rgba(8,17,22,.88)); }
.contact .container { position: relative; z-index: 1; }
.contact__desc { text-wrap: pretty; margin-top: 20px; color: rgba(255,255,255,.74); font-size: 15px; line-height: 1.55; }
.contact__email { position: relative; margin-top: 70px; display: inline-flex; align-items: center; gap: 14px; }
.contact__email-link { padding-bottom: 2px; border-bottom: 1px solid rgba(255,255,255,.86); color: #fff; font-size: 24px; font-weight: 400; line-height: 1.2; }
.contact__copy-btn { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: rgba(255,255,255,.20); transition: transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease); }
.contact__copy-btn:hover { transform: translateY(-2px); background: rgba(255,255,255,.30); }
.contact__toast { position: absolute; left: 50%; top: -42px; padding: 6px 12px; border-radius: 20px; color: #05231b; background: var(--mint); font-size: 12px; font-weight: 700; white-space: nowrap; opacity: 0; transform: translate(-50%,6px); transition: .25s var(--ease); pointer-events: none; }
.contact__toast.is-visible { opacity: 1; transform: translate(-50%,0); }
.footer { min-height: 222px; padding: 56px 0 42px; color: #fff; background: var(--bg-footer); border-top: 1px solid rgba(255,255,255,.06); }
.footer__inner { display: flex; align-items: flex-start; justify-content: space-between; gap: 48px; }
.footer__logo img { width: 125px; height: auto; }
.footer__copyright { margin-top: 28px; color: rgba(255,255,255,.70); font-size: 12px; }
.footer__nav-groups { display: flex; gap: 76px; padding-top: 8px; }
.footer__group-title { margin-bottom: 26px; color: rgba(255,255,255,.28); font-size: 11px; font-weight: 600; letter-spacing: .03em; }
.footer__group a { color: rgba(255,255,255,.48); font-size: 13px; transition: color var(--dur-fast) var(--ease); }
.footer__group a:hover { color: #fff; }
.float-top { position: fixed; z-index: 900; right: 26px; bottom: 28px; width: 46px; height: 46px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.22); border-radius: 50%; color: #fff; background: rgba(0,0,0,.58); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); opacity: 0; transform: translateY(8px); pointer-events: none; transition: .25s var(--ease); }
.float-top.is-visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.float-top:hover { transform: translateY(-3px); background: rgba(0,0,0,.78); }


.desktop-break { display: inline; }
.trust__lower-title, .stat__label, .evidence-list__head { text-wrap: balance; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

/* v14 — vector ROC chart remains sharp and fully visible at every viewport size */
.clinical-performance__card img[src$=".svg"] {
  image-rendering: auto;
  shape-rendering: geometricPrecision;
}