:root {
  --navy: #15223f;
  --navy-deep: #0d1730;
  --yellow: #f2b705;
  --olive: #4e5b3a;
  --soil: #e9ebe4;
  --paper: #f7f8f4;
  --ink: #18202e;
  --muted: #5b6474;
  --line: #d3d7cc;

  --kr: "IBM Plex Sans KR", system-ui, sans-serif;
  --latin: "Archivo", var(--kr);
  --wrap: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--kr);
  font-size: 17px;
  line-height: 1.7;
  word-break: keep-all;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { margin: 0; line-height: 1.3; letter-spacing: -0.02em; }
p { margin: 0; }
:focus-visible { outline: 3px solid var(--yellow); outline-offset: 3px; }

.wrap { width: min(var(--wrap), 100% - 40px); margin-inline: auto; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px max(20px, calc((100% - var(--wrap)) / 2));
  background: var(--navy);
  color: #fff;
}
.wordmark {
  font-family: var(--latin);
  font-weight: 800;
  font-stretch: 125%;
  font-size: 22px;
  letter-spacing: 0.04em;
  text-decoration: none;
}
.wordmark.small { font-size: 16px; color: var(--navy); }
.nav nav { display: flex; align-items: center; gap: 28px; font-size: 15px; }
.nav nav a { text-decoration: none; opacity: .82; }
.nav nav a:hover { opacity: 1; }
.nav nav a[aria-current] { opacity: 1; box-shadow: inset 0 -2px 0 var(--yellow); padding-bottom: 4px; }
.nav .nav-cta {
  opacity: 1; background: var(--yellow); color: var(--navy-deep);
  padding: 7px 16px; border-radius: 4px; font-weight: 600;
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  min-height: min(calc(100vh - 62px), 900px);
  min-height: min(calc(100svh - 62px), 900px);
  color: #fff;
  background: var(--navy-deep);
  overflow: hidden;
}
.hero-media { position: absolute; inset: 0; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 50%; }
.hero-media::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(13,23,48,.92) 0%, rgba(13,23,48,.7) 38%, rgba(13,23,48,.05) 70%);
}
.hero-route { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1; }
.route-band { fill: rgba(242,183,5,.24); opacity: 0; animation: pop .8s .6s forwards; }
.route-line {
  fill: none; stroke: var(--yellow); stroke-width: 4; stroke-linecap: round;
  stroke-dasharray: 1; stroke-dashoffset: 1;
  animation: draw 2.2s .6s cubic-bezier(.4,.1,.2,1) forwards;
}
.route-goal { fill: var(--yellow); opacity: 0; animation: pop .3s 2.7s forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes pop { to { opacity: 1; } }

.hero-copy {
  position: relative; z-index: 2;
  align-self: center;
  width: min(var(--wrap), 100% - 40px);
  margin-inline: auto;
  padding: 80px 0 140px;
}
.hero h1 {
  font-size: clamp(36px, 5.6vw, 68px);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.18;
  max-width: 13em;
}
.hero-copy p {
  margin-top: 24px; max-width: 34em;
  font-size: 18px; color: rgba(255,255,255,.82);
}
.hero-actions { margin-top: 36px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 13px 26px; border-radius: 4px;
  font-weight: 600; font-size: 16px; text-decoration: none;
}
.btn-solid { background: var(--yellow); color: var(--navy-deep); }
.btn-solid:hover { background: #ffc61a; }
.btn-line { border: 1.5px solid rgba(255,255,255,.6); color: #fff; }
.btn-line:hover { border-color: #fff; }

.hero-facts {
  position: absolute; z-index: 2; left: 0; right: 0; bottom: 0; margin: 0;
  display: grid; grid-template-columns: repeat(3, 1fr);
  padding: 0 max(20px, calc((100% - var(--wrap)) / 2));
  background: rgba(13,23,48,.82);
  backdrop-filter: blur(6px);
}
.hero-facts div { padding: 18px 0; border-left: 1px solid rgba(255,255,255,.14); padding-left: 20px; }
.hero-facts div:first-child { border-left: 0; padding-left: 0; }
.hero-facts dt { font-size: 13px; color: rgba(255,255,255,.62); }
.hero-facts dd { margin: 2px 0 0; font-family: var(--latin); font-size: 22px; font-weight: 700; }

/* ---------- shared section type ---------- */
.sec-title { font-size: clamp(28px, 3.4vw, 42px); font-weight: 700; color: var(--navy); }
.sec-sub { margin-top: 16px; max-width: 40em; color: var(--muted); }

/* ---------- problem ---------- */
.problem { background: var(--navy-deep); color: #fff; padding: 120px 0; }
.problem-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 64px; align-items: start; }
.problem-title { font-size: clamp(30px, 3.8vw, 48px); font-weight: 700; line-height: 1.25; position: sticky; top: 110px; }
.problem-list { list-style: none; margin: 0; padding: 0; }
.problem-list li { padding: 0 0 36px 28px; border-left: 2px solid rgba(255,255,255,.16); position: relative; }
.problem-list li::before { content: ""; position: absolute; left: -7px; top: 8px; width: 12px; height: 12px; background: var(--yellow); }
.problem-list h3 { font-size: 21px; }
.problem-list p { margin-top: 8px; color: rgba(255,255,255,.72); }
.problem-answer { grid-column: 2; padding-left: 28px; font-size: 19px; font-weight: 600; color: var(--yellow); }
.problem-answer a { color: #fff; margin-left: 10px; font-weight: 500; font-size: 16px; }

/* ---------- about ---------- */
.about {
  padding: 120px 0 110px;
  display: grid; grid-template-columns: 5fr 7fr; gap: 64px;
}
.lead { font-size: 21px; line-height: 1.65; color: var(--ink); }
.caps {
  list-style: none; padding: 0; margin: 48px 0 0;
  display: grid; grid-template-columns: 1fr 1fr;
  border-top: 2px solid var(--navy);
}
.caps li { padding: 22px 24px 26px 0; border-bottom: 1px solid var(--line); }
.caps li:nth-child(even) { padding-left: 24px; border-left: 1px solid var(--line); }
.caps h3 { font-size: 18px; color: var(--navy); }
.caps p { margin-top: 6px; font-size: 15px; color: var(--muted); }

/* ---------- tech ---------- */
.tech { background: var(--navy); color: #fff; padding: 110px 0; }
.tech .sec-title { color: #fff; }
.tech .sec-sub { color: rgba(255,255,255,.7); }
.tech-row {
  margin-top: 64px;
  display: grid; grid-template-columns: 7fr 5fr; gap: 56px; align-items: center;
}
.tech-row.flip { grid-template-columns: 5fr 7fr; }
.tech-row.flip .tech-fig { order: 2; }
.tech-fig { margin: 0; }
.tech-fig img { width: 100%; border-radius: 2px; }
.tech-text h3 { font-size: 24px; }
.tech-text h3::before {
  content: ""; display: block; width: 36px; height: 4px; background: var(--yellow); margin-bottom: 18px;
}
.tech-text p { margin-top: 14px; color: rgba(255,255,255,.78); }

/* ---------- products ---------- */
.products { padding: 120px 0; }
.prod-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.seg { display: inline-flex; border: 1.5px solid var(--navy); border-radius: 6px; padding: 3px; }
.seg button {
  font: inherit; font-size: 15px; font-weight: 600; cursor: pointer;
  border: 0; background: none; color: var(--navy); padding: 8px 22px; border-radius: 4px;
}
.seg button[aria-selected="true"] { background: var(--navy); color: #fff; }

.panel { margin-top: 48px; display: grid; gap: 28px; }
.prod {
  display: grid; grid-template-columns: 7fr 5fr; gap: 0;
  background: #fff; border: 1px solid var(--line);
}
.prod-shots { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 32px; background: #fff; }
.prod-shots img { flex: 1 1 0; min-width: 0; max-height: 300px; object-fit: contain; }
.prod-info { padding: 40px 40px 40px 36px; border-left: 6px solid var(--accent); }
.prod-yellow { --accent: var(--yellow); }
.prod-olive { --accent: var(--olive); }
.prod h3 { font-family: var(--latin); font-stretch: 112%; font-size: 34px; font-weight: 800; color: var(--navy); letter-spacing: 0; }
.prod-tag { color: var(--muted); margin-top: 2px; }
.spec { width: 100%; border-collapse: collapse; margin: 24px 0 18px; font-size: 15px; }
.spec th, .spec td { text-align: left; padding: 9px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec th { width: 7em; font-weight: 500; color: var(--muted); }
.spec td { font-weight: 600; }
.prod-info > p:last-child { font-size: 15px; color: var(--muted); }
.ticks { margin: 22px 0 0; padding-left: 1.1em; font-size: 15px; }
.ticks li { margin-bottom: 8px; }
.prod-use {
  margin-top: 20px !important; padding-top: 16px; border-top: 1px solid var(--line);
  font-weight: 600; color: var(--navy) !important;
}

/* ---------- fields ---------- */
.fields { display: grid; grid-template-columns: 1fr 1fr; }
.field {
  position: relative; min-height: 640px; display: flex; align-items: flex-end;
  background: var(--img) center / cover no-repeat; color: #fff;
}
.field::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(13,23,48,0) 20%, rgba(13,23,48,.9) 72%);
}
.field + .field::before { background: linear-gradient(180deg, rgba(30,38,22,0) 20%, rgba(30,38,22,.92) 72%); }
.field-inner { position: relative; padding: 48px; max-width: 560px; }
.field h2 { font-size: 40px; }
.field-inner p { margin-top: 12px; color: rgba(255,255,255,.85); }
.field ul { margin: 20px 0 0; padding: 0; list-style: none; font-size: 15px; }
.field li { padding: 8px 0; border-top: 1px solid rgba(255,255,255,.2); }

/* ---------- field work ---------- */
.fieldwork { padding: 120px 0 100px; }
.gallery {
  margin-top: 44px;
  display: grid; gap: 14px;
  grid-template-columns: 2fr 1fr;
  grid-template-rows: auto auto;
}
.gallery figure { margin: 0; position: relative; overflow: hidden; }
.gallery img { width: 100%; height: 100%; object-fit: cover; }
.g-tall { grid-column: 2; grid-row: 1 / span 2; }
.gallery figcaption {
  position: absolute; left: 0; bottom: 0; right: 0;
  padding: 28px 16px 12px; font-size: 14px; color: #fff;
  background: linear-gradient(transparent, rgba(0,0,0,.7));
  display: flex; justify-content: space-between; gap: 12px;
}
.gallery time { font-family: var(--latin); opacity: .85; }
.events { list-style: none; padding: 0; margin: 28px 0 0; border-top: 1px solid var(--line); }
.events li { display: flex; gap: 28px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.events time { font-family: var(--latin); font-weight: 700; color: var(--navy); min-width: 6.5em; }

/* ---------- history ---------- */
.history { background: var(--soil); padding: 110px 0; }
.years { margin-top: 48px; display: grid; grid-template-columns: 1fr 1.4fr 2fr; gap: 0; border-top: 2px solid var(--navy); }
.year { padding: 28px 28px 8px 0; }
.year + .year { padding-left: 28px; border-left: 1px solid var(--line); }
.year-num {
  font-family: var(--latin); font-stretch: 125%; font-weight: 800;
  font-size: clamp(44px, 5vw, 68px); line-height: 1; color: var(--navy); letter-spacing: -0.02em;
}
.year:last-child .year-num { color: var(--yellow); -webkit-text-stroke: 1.5px var(--navy); }
.year ol { list-style: none; margin: 24px 0 0; padding: 0; }
.year li { display: grid; grid-template-columns: 3em 1fr; gap: 12px; padding: 12px 0; border-top: 1px solid var(--line); font-size: 15px; }
.year time { font-weight: 600; color: var(--muted); }
.year strong { display: block; color: var(--navy); font-size: 16px; }
.year span { color: var(--muted); }

/* ---------- roadmap ---------- */
.roadmap { padding: 120px 0; }
.steps {
  list-style: none; padding: 0; margin: 48px 0 0;
  display: grid; grid-template-columns: repeat(3, 1fr);
  counter-reset: step;
}
.steps li { counter-increment: step; padding: 0 28px 0 0; position: relative; }
.steps li + li { padding-left: 28px; border-left: 1px solid var(--line); }
.steps li::before {
  content: counter(step);
  display: grid; place-items: center;
  width: 40px; height: 40px; border-radius: 50%;
  font-family: var(--latin); font-weight: 800; font-size: 18px;
  background: var(--navy); color: #fff; margin-bottom: 18px;
}
.steps li:first-child::before { background: var(--yellow); color: var(--navy-deep); }
.when { font-family: var(--latin); font-weight: 600; color: var(--muted); font-size: 15px; }
.steps h3 { margin-top: 4px; font-size: 20px; color: var(--navy); }
.steps p { margin-top: 10px; font-size: 15px; color: var(--muted); }

/* ---------- team ---------- */
.team { background: #fff; border-top: 1px solid var(--line); padding: 110px 0 90px; }
.team-head { display: flex; justify-content: space-between; align-items: baseline; gap: 24px; flex-wrap: wrap; }
.team-note { color: var(--muted); font-size: 15px; }
.people { list-style: none; padding: 0; margin: 40px 0 0; display: grid; grid-template-columns: 1.25fr 1fr 1fr; gap: 28px; }
.people > li { display: grid; grid-template-columns: 120px 1fr; gap: 20px; align-items: start; }
.people > li > img { width: 120px; aspect-ratio: 4 / 5; object-fit: cover; object-position: 50% 20%; background: var(--soil); }
.people strong { display: block; font-size: 22px; color: var(--navy); }
.people .role { display: inline-block; margin-top: 2px; font-size: 14px; font-weight: 600; color: var(--navy); background: var(--yellow); padding: 1px 8px; }
.people p { margin-top: 10px; font-size: 15px; color: var(--muted); }
.affil { list-style: none; padding: 0; margin: 14px 0 0; display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; }
.affil img { height: 18px; width: auto; }

/* ---------- partners ---------- */
.partners-sec { background: #fff; padding: 20px 0 120px; }
.logo-wall {
  list-style: none; padding: 0; margin: 40px 0 0;
  display: grid; grid-template-columns: repeat(5, 1fr);
  border-left: 1px solid var(--line); border-top: 1px solid var(--line);
}
.logo-wall li {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  height: 104px; padding: 18px 22px;
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  font-weight: 700; color: var(--navy); font-size: 16px; text-align: center;
}
.logo-wall img { max-height: 40px; max-width: 100%; width: auto; object-fit: contain; filter: grayscale(1) contrast(1.15); opacity: .8; }
.logo-wall .with-name img { max-height: 46px; }

/* ---------- contact ---------- */
.contact { background: var(--yellow); color: var(--navy-deep); padding: 96px 0; }
.contact-grid { display: grid; grid-template-columns: 6fr 6fr; gap: 48px; align-items: end; }
.contact h2 { font-size: clamp(28px, 3.6vw, 44px); font-weight: 700; }
.contacts { margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.contacts dt { font-weight: 700; padding-bottom: 8px; border-bottom: 2px solid var(--navy-deep); margin-bottom: 10px; }
.contacts dd { margin: 0; font-size: 16px; }
.contacts a { text-decoration: none; }
.contacts a:hover { text-decoration: underline; }

.foot { display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: center; padding: 32px 0; font-size: 14px; color: var(--muted); }
.foot span { white-space: nowrap; }
.foot span:last-child { margin-left: auto; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .nav nav a:not(.nav-cta) { display: none; }
  .about, .contact-grid, .problem-grid { grid-template-columns: 1fr; gap: 36px; }
  .problem { padding: 80px 0; }
  .problem-title { position: static; }
  .problem-answer { grid-column: 1; }
  .years { grid-template-columns: 1fr; }
  .year, .year + .year { padding: 24px 0 8px; border-left: 0; }
  .year + .year { border-top: 1px solid var(--line); }
  .people { grid-template-columns: 1fr; gap: 32px; }
  .people > li { grid-template-columns: 96px 1fr; }
  .people > li > img { width: 96px; }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .logo-wall li { height: 84px; padding: 14px; }
  .tech-row, .tech-row.flip { grid-template-columns: 1fr; gap: 24px; }
  .tech-row.flip .tech-fig { order: 0; }
  .prod { grid-template-columns: 1fr; }
  .prod-info { border-left: 0; border-top: 6px solid var(--accent); padding: 28px 24px; }
  .fields { grid-template-columns: 1fr; }
  .field { min-height: 560px; }
  .field-inner { padding: 32px 20px; }
  .gallery { grid-template-columns: 1fr; }
  .g-tall { grid-column: 1; grid-row: auto; }
  .g-tall img { aspect-ratio: 4 / 5; }
  .steps { grid-template-columns: 1fr; gap: 32px; }
  .steps li, .steps li + li { padding: 0; border-left: 0; }
  .hero-facts { grid-template-columns: 1fr; position: relative; }
  .hero-facts div, .hero-facts div:first-child { border-left: 0; padding: 12px 0; border-top: 1px solid rgba(255,255,255,.14); }
  .hero-copy { padding: 64px 0 48px; }
  .hero-media::after { background: linear-gradient(180deg, rgba(13,23,48,.55) 0%, rgba(13,23,48,.92) 70%); }
  .about, .products, .fieldwork, .roadmap { padding: 80px 0; }
  .contacts { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .route-line { animation: none; stroke-dashoffset: 0; }
  .route-band { animation: none; opacity: 1; }
  .route-goal { animation: none; opacity: 1; }
  html { scroll-behavior: auto; }
}

.panel[hidden] { display: none; }