@charset "UTF-8";

@font-face {
  font-family: "Pretendard";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("../assets/fonts/PretendardVariable.woff2") format("woff2");
}

:root {
  color-scheme: light;
  --ink: #111827;
  --muted: #5f6673;
  --line: #dde3ea;
  --paper: #f7f8f4;
  --white: #ffffff;
  --lime: #c7f94f;
  --blue: #1f6feb;
  --violet: #6b2cff;
  --coral: #ff6b4a;
  --mint: #9ee6dc;
  --shadow: 0 24px 80px rgba(17, 24, 39, 0.16);
  --radius: 8px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    linear-gradient(90deg, rgba(17, 24, 39, 0.035) 1px, transparent 1px),
    linear-gradient(180deg, #ffffff 0%, var(--paper) 42%, #ffffff 100%);
  background-size: 72px 72px, auto;
  color: var(--ink);
  font-family: "Pretendard", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  letter-spacing: 0;
  word-break: keep-all;
}

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

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

.progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 30;
  width: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--lime), var(--blue), var(--coral));
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: min(100% - 40px, var(--max));
  margin: 16px auto 0;
  padding: 10px 12px;
  border: 1px solid rgba(17, 24, 39, 0.1);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 12px 40px rgba(17, 24, 39, 0.08);
  backdrop-filter: blur(16px);
}

.brand,
.nav,
.hero-actions,
.contact-actions,
.tags {
  display: flex;
  align-items: center;
}

.brand {
  flex: 0 0 auto;
  gap: 10px;
  font-weight: 850;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--lime);
  font-size: 13px;
}

.nav {
  justify-content: center;
  gap: 6px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.nav a,
.header-action {
  padding: 10px 12px;
  border-radius: 999px;
}

.nav a:hover,
.nav a.is-active {
  background: #eef3f8;
  color: var(--ink);
}

.header-action {
  flex: 0 0 auto;
  background: var(--ink);
  color: var(--white);
  font-size: 14px;
  font-weight: 800;
}

.hero,
.section,
.metrics,
.contact,
.footer {
  width: min(100% - 40px, var(--max));
  margin-inline: auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 0.78fr);
  gap: 52px;
  align-items: center;
  min-height: calc(100vh - 96px);
  padding: 56px 0 44px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  line-height: 1.2;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin-bottom: 26px;
  font-size: clamp(44px, 5.4vw, 76px);
  font-weight: 920;
  line-height: 1.04;
}

.hero-lead {
  max-width: 720px;
  margin-bottom: 32px;
  color: #343b46;
  font-size: clamp(18px, 1.8vw, 21px);
  font-weight: 560;
  line-height: 1.65;
}

.hero-actions,
.contact-actions {
  flex-wrap: wrap;
  gap: 10px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 850;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(17, 24, 39, 0.14);
}

.button.primary {
  background: var(--ink);
  color: var(--white);
}

.button.secondary {
  background: var(--white);
}

.hero-visual {
  position: relative;
  min-height: 590px;
}

.device-stack {
  position: absolute;
  inset: 0;
}

.phone {
  position: absolute;
  overflow: hidden;
  width: min(250px, 43vw);
  aspect-ratio: 9 / 19.5;
  margin: 0;
  border: 10px solid var(--ink);
  border-radius: 34px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.phone img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}

.phone-front {
  right: 44px;
  top: 0;
  z-index: 2;
  transform: rotate(2deg);
}

.phone-back {
  left: 18px;
  top: 112px;
  z-index: 1;
  transform: rotate(-7deg);
}

.signal-panel {
  position: absolute;
  right: 0;
  bottom: 34px;
  z-index: 3;
  width: min(330px, 86vw);
  padding: 20px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--lime);
  box-shadow: 10px 10px 0 var(--ink);
}

.panel-kicker,
.mini-label,
.work-meta,
.tags span,
.evidence-grid span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 850;
}

.signal-panel strong {
  display: block;
  margin: 10px 0;
  font-size: 20px;
  line-height: 1.25;
}

.signal-panel p {
  margin-bottom: 0;
  line-height: 1.55;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  background: var(--white);
}

.metrics div {
  min-width: 0;
  padding: 24px;
  border-right: 1px solid var(--line);
}

.metrics div:last-child {
  border-right: 0;
}

.metrics strong {
  display: block;
  margin-bottom: 8px;
  font-size: clamp(24px, 3vw, 42px);
  font-weight: 930;
  line-height: 1;
}

.metrics span {
  color: var(--muted);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.45;
}

.section {
  padding: 104px 0;
}

.section-heading {
  display: grid;
  grid-template-columns: 0.32fr 1fr;
  gap: 28px;
  align-items: start;
  margin-bottom: 34px;
}

.section-heading.compact {
  display: block;
  max-width: 820px;
}

.section h2,
.contact h2 {
  margin-bottom: 0;
  font-size: clamp(32px, 5vw, 64px);
  font-weight: 920;
  line-height: 1.08;
}

.thesis-grid,
.evidence-grid,
.work-grid,
.case-outcomes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.thesis-grid article,
.evidence-grid article,
.work-card,
.case-outcomes article {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.82);
}

.thesis-grid article {
  padding: 30px;
}

.thesis-grid h3,
.evidence-grid h3,
.work-card h3,
.case-outcomes h3 {
  margin: 14px 0 12px;
  font-size: 24px;
  line-height: 1.2;
}

.thesis-grid p,
.evidence-grid p,
.work-card p,
.case-copy p,
.case-outcomes p {
  color: #414956;
  font-size: 16px;
  line-height: 1.75;
}

.case-study {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 44px;
  align-items: center;
  padding-top: 72px;
}

.case-copy {
  max-width: 640px;
}

.impact-list {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.impact-list li {
  position: relative;
  padding: 16px 16px 16px 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  color: #28313c;
  font-weight: 680;
  line-height: 1.55;
}

.impact-list li::before {
  position: absolute;
  left: 16px;
  top: 18px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--coral);
  content: "";
}

.case-gallery {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 0.82fr;
  gap: 14px;
  align-items: end;
}

.gallery-main {
  overflow: hidden;
  width: 100%;
  max-height: 680px;
  border: 10px solid var(--ink);
  border-radius: 34px;
  box-shadow: var(--shadow);
  object-fit: cover;
  object-position: top;
}

.gallery-card {
  display: grid;
  place-items: center;
  min-height: 220px;
  padding: 28px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--mint);
  text-align: center;
  box-shadow: 8px 8px 0 var(--ink);
}

.gallery-card.dark {
  grid-column: 2;
  background: var(--ink);
  color: var(--white);
  box-shadow: none;
}

.gallery-card img {
  max-width: 120px;
  max-height: 120px;
  margin-bottom: 18px;
  object-fit: contain;
}

.gallery-card span {
  font-weight: 900;
}

.case-outcomes {
  grid-column: 1 / -1;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 10px;
}

.case-outcomes article {
  padding: 24px;
  background: var(--white);
}

.case-outcomes small {
  display: block;
  margin-top: 18px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 850;
  line-height: 1.5;
}

.evidence {
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.evidence-grid {
  grid-template-columns: repeat(4, 1fr);
}

.evidence-grid article {
  padding: 24px;
}

.evidence-grid h3 {
  font-size: 21px;
}

.evidence-grid span {
  display: block;
  margin-top: 18px;
  color: var(--blue);
}

.work-grid {
  align-items: stretch;
}

.work-card {
  padding: 28px;
}

.work-card.featured {
  background: var(--ink);
  color: var(--white);
}

.work-card.featured p,
.work-card.featured .work-meta {
  color: rgba(255, 255, 255, 0.72);
}

.tags {
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.tags span {
  padding: 7px 10px;
  border: 1px solid rgba(17, 24, 39, 0.14);
  border-radius: 999px;
  background: #f1f5f9;
  color: #253041;
}

.featured .tags span {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.12);
  color: var(--white);
}

.timeline {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.timeline li {
  display: grid;
  grid-template-columns: 230px 1fr;
  gap: 28px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.timeline time {
  color: var(--blue);
  font-weight: 900;
}

.timeline strong {
  display: block;
  margin-bottom: 8px;
  font-size: 20px;
}

.timeline p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.6;
}

.contact {
  display: grid;
  grid-template-columns: 1fr 0.42fr;
  gap: 40px;
  align-items: end;
  margin-bottom: 76px;
  padding: 42px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--lime);
  box-shadow: 12px 12px 0 var(--ink);
}

.contact-actions {
  justify-content: flex-end;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 26px 0 42px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 980px) {
  .site-header {
    width: min(100% - 24px, var(--max));
  }

  .nav {
    display: none;
  }

  .hero,
  .case-study,
  .section-heading,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 56px;
  }

  .hero-visual {
    min-height: 560px;
  }

  .metrics,
  .thesis-grid,
  .evidence-grid,
  .work-grid,
  .case-outcomes {
    grid-template-columns: repeat(2, 1fr);
  }

  .case-copy {
    max-width: none;
  }

  .contact-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 700px) {
  body {
    background-size: 44px 44px, auto;
  }

  .site-header,
  .hero,
  .section,
  .metrics,
  .contact,
  .footer {
    width: min(100% - 24px, var(--max));
  }

  .site-header {
    margin-top: 10px;
    border-radius: var(--radius);
  }

  .header-action {
    font-size: 13px;
  }

  .hero {
    gap: 24px;
    padding: 44px 0 34px;
  }

  h1 {
    font-size: clamp(42px, 14vw, 64px);
  }

  .hero-lead {
    font-size: 17px;
  }

  .button {
    width: 100%;
  }

  .hero-visual {
    min-height: 468px;
  }

  .phone {
    width: 204px;
    border-width: 8px;
    border-radius: 28px;
  }

  .phone-front {
    right: 0;
    top: 0;
  }

  .phone-back {
    left: 0;
    top: 98px;
  }

  .signal-panel {
    right: 4px;
    bottom: 0;
    width: calc(100% - 8px);
    box-shadow: 7px 7px 0 var(--ink);
  }

  .metrics,
  .thesis-grid,
  .evidence-grid,
  .work-grid,
  .case-outcomes,
  .case-gallery {
    grid-template-columns: 1fr;
  }

  .metrics div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .metrics div:last-child {
    border-bottom: 0;
  }

  .section {
    padding: 72px 0;
  }

  .section h2,
  .contact h2 {
    font-size: clamp(30px, 9vw, 44px);
  }

  .thesis-grid article,
  .evidence-grid article,
  .work-card,
  .case-outcomes article {
    padding: 22px;
  }

  .gallery-main {
    max-height: 560px;
  }

  .gallery-card.dark {
    grid-column: auto;
  }

  .timeline li {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .contact {
    padding: 26px;
    box-shadow: 7px 7px 0 var(--ink);
  }

  .footer {
    flex-direction: column;
  }
}