/* ---------------------------------------------------------------------------
   Viuron — 팔레트는 로고의 teal 헥사곤에서 도출
--------------------------------------------------------------------------- */
:root {
  --ink: #10201e;
  --ink-soft: #3d5350;
  --teal: #17877c;
  --teal-deep: #0e5a53;
  --paper: #fafbfa;
  --mist: #e4edeb;
  --line: #cfdedb;

  --font-body: "Pretendard Variable", Pretendard, -apple-system, "Segoe UI",
    "Malgun Gothic", sans-serif;
  --font-display: "Archivo", var(--font-body);
  --font-mono: "IBM Plex Mono", "D2Coding", monospace;

  --max-w: 1120px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  word-break: keep-all;
}

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

/* ---- 공통 요소 ---------------------------------------------------------- */

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.75rem;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 750;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}

section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 5rem 1.5rem 0;
}

/* ---- 상단 내비게이션 ----------------------------------------------------- */

.nav {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: 125%;
  letter-spacing: 0.28em;
  font-size: 0.95rem;
}

.nav__links {
  display: flex;
  gap: 1.75rem;
}

.nav__links a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav__links a:hover {
  color: var(--teal-deep);
}

/* ---- Hero --------------------------------------------------------------- */

.hero {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 3.5rem;
  align-items: center;
  padding-top: 4rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 780;
  font-stretch: 125%;
  font-size: clamp(3rem, 7vw, 4.8rem);
  letter-spacing: 0.02em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.hero__tagline {
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  color: var(--ink-soft);
  margin-bottom: 2.25rem;
}

.hero__tagline strong {
  color: var(--ink);
  font-weight: 700;
}

.hero__actions {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.7rem 1.5rem;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.btn--primary {
  background: var(--teal);
  color: #fff;
}

.btn--primary:hover {
  background: var(--teal-deep);
}

.btn--ghost {
  border: 1px solid var(--line);
  color: var(--ink);
}

.btn--ghost:hover {
  border-color: var(--teal);
  color: var(--teal-deep);
}

/* 뷰파인더 프레임 */
.viewfinder {
  position: relative;
  padding: 1.1rem;
}

.viewfinder img {
  border-radius: 4px;
}

.vf-corner {
  position: absolute;
  width: 26px;
  height: 26px;
  border: 2.5px solid var(--teal);
}

.vf-tl { top: 0; left: 0; border-right: 0; border-bottom: 0; }
.vf-tr { top: 0; right: 0; border-left: 0; border-bottom: 0; }
.vf-bl { bottom: 0; left: 0; border-right: 0; border-top: 0; }
.vf-br { bottom: 0; right: 0; border-left: 0; border-top: 0; }

@media (prefers-reduced-motion: no-preference) {
  .vf-corner {
    animation: vf-in 0.7s ease both;
  }

  @keyframes vf-in {
    from { opacity: 0; }
    to { opacity: 1; }
  }
}

/* ---- 회사 소개 ----------------------------------------------------------- */

.about__lead {
  font-size: 1.1rem;
  color: var(--ink-soft);
  max-width: 46rem;
  margin-bottom: 3rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

/* 카드 내부를 subgrid로 정렬해 이미지·제목·설명·성과 행이
   세 카드 모두 같은 높이에 오도록 한다 (성과 구분선 정렬) */
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.4rem;
  display: grid;
  grid-template-rows: subgrid;
  grid-row: span 4;
}

.card__visual {
  position: relative;
  margin: 1rem 0 1.2rem;
}

.card__visual img {
  border-radius: 6px;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  width: 100%;
}

.card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.card > p {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.card__results {
  margin-top: 1.2rem;
  border-top: 1px dashed var(--line);
  padding-top: 1rem;
}

.card__results h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.5rem;
}

.card__results li {
  list-style: none;
  font-size: 0.9rem;
  padding-left: 1.1rem;
  position: relative;
  margin-bottom: 0.25rem;
}

.card__results li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--teal);
}

.card__results a {
  color: var(--teal);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--teal);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
  border-radius: 2px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

/* 외부 링크 표시 — 클릭 가능함을 시각적으로 알린다 */
.card__results a::after {
  content: "\2197";
  font-size: 0.8em;
  margin-left: 0.15em;
  display: inline-block;
}

.card__results a:hover {
  color: var(--teal-deep);
  background: var(--mist);
  text-decoration-color: var(--teal-deep);
}

/* 근거자료 버튼 — 링크와 구분되는 점선 밑줄, dialog를 연다 */
.evidence-btn {
  font: inherit;
  font-weight: 600;
  color: var(--teal);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  text-decoration: underline dotted;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
  border-radius: 2px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.evidence-btn:hover {
  color: var(--teal-deep);
  background: var(--mist);
}

.evidence-btn:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

/* ---- 근거자료 dialog ------------------------------------------------------ */

.evidence-dialog {
  margin: auto; /* 전역 reset이 UA의 중앙 정렬을 지우므로 복원 */
  border: none;
  border-radius: 12px;
  padding: 0;
  max-width: min(920px, 92vw);
  max-height: 88vh;
  box-shadow: 0 24px 64px rgba(16, 32, 30, 0.35);
}

.evidence-dialog::backdrop {
  background: rgba(16, 32, 30, 0.55);
}

.evidence-dialog__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid var(--mist);
  position: sticky;
  top: 0;
  background: #fff;
}

.evidence-dialog__head h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.evidence-dialog__close {
  font-size: 1.5rem;
  line-height: 1;
  color: var(--ink-soft);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.1rem 0.4rem;
  border-radius: 6px;
}

.evidence-dialog__close:hover {
  color: var(--ink);
  background: var(--mist);
}

.evidence-dialog img {
  display: block;
  width: 100%;
}

/* ---- 연락처 -------------------------------------------------------------- */

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2.5rem;
  align-items: start;
  margin-top: 1.5rem;
}

.contact__info p {
  margin-bottom: 1.1rem;
  display: flex;
  flex-direction: column;
}

.contact__key {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.15rem;
}

.contact__info a {
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.contact__info a:hover {
  color: var(--teal-deep);
}

.contact__map {
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}

.contact__map iframe {
  display: block;
  width: 100%;
  height: 360px;
  border: 0;
}

/* ---- Footer -------------------------------------------------------------- */

.footer {
  max-width: var(--max-w);
  margin: 5rem auto 0;
  padding: 1.75rem 1.5rem;
  border-top: 1px solid var(--mist);
  color: var(--ink-soft);
  font-size: 0.85rem;
}

/* ---- 접근성 -------------------------------------------------------------- */

a:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

/* ---- 반응형 -------------------------------------------------------------- */

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding-top: 2.5rem;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  .contact__grid {
    grid-template-columns: 1fr;
  }

  section {
    padding-top: 3.5rem;
  }
}