/* ============================================================
   우리터건설건축사사무소 · URI ARCH.
   디자인: 미니멀 / 사진 중심 / 로고 기반 차콜 블랙 + 크림 + 브론즈
   ============================================================ */

:root {
  --ink-900: #17150f;   /* 가장 진한 배경 (로고 막대 색) */
  --ink-800: #232019;
  --ink-700: #36322a;
  --ink-600: #4a463c;
  --bronze:     #b08d57; /* 따뜻한 브론즈 포인트 */
  --bronze-dark:#8a6f44;
  --cream:   #f4f0e7;    /* 페이지 바탕 */
  --cream-2: #ebe5d8;    /* 로고 베이지 톤 섹션 */
  --ink:       #1c1a16;
  --ink-soft:  #56514a;
  --line:      rgba(28,26,22,.12);
  --white:     #ffffff;

  --serif: "Noto Serif KR", "Gowun Batang", serif;
  --sans: "Pretendard", -apple-system, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;

  --maxw: 1200px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--cream);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container { width: min(var(--maxw), 90%); margin-inline: auto; }

/* ---------- 로고 마크 (SVG, currentColor로 자동 색상) ---------- */
.logo-mark { width: 1.6em; height: 1.6em; flex: none; }

/* ---------- 공통 섹션 헤더 ---------- */
.section__label {
  font-size: .78rem;
  letter-spacing: .35em;
  font-weight: 600;
  color: var(--bronze-dark);
  margin-bottom: 1rem;
}
.section__title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1.25;
  letter-spacing: -.01em;
}
.section__head { margin-bottom: 3.5rem; }
.section__head--row {
  display: flex; justify-content: space-between;
  align-items: flex-end; gap: 2rem; flex-wrap: wrap;
}

/* ---------- 버튼 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .95rem 2rem;
  font-size: .95rem; font-weight: 600;
  border-radius: 2px;
  transition: all .35s var(--ease);
  cursor: pointer; border: 1px solid transparent;
}
.btn--primary { background: var(--ink-800); color: var(--cream); }
.btn--primary:hover { background: var(--ink-900); transform: translateY(-2px); }
.btn--ghost { border-color: currentColor; color: var(--ink-800); }
.btn--ghost:hover { background: var(--ink-800); color: var(--cream); border-color: var(--ink-800); }
.btn--full { width: 100%; }

/* ---------- 내비게이션 ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: all .4s var(--ease);
}
.nav__inner {
  width: min(var(--maxw), 92%); margin-inline: auto;
  height: 76px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav__logo { display: flex; align-items: center; gap: .55rem; font-weight: 800; letter-spacing: .02em; color: var(--cream); transition: color .4s; }
.nav__logo-text { font-size: 1.05rem; }
.nav__menu { display: flex; gap: 2.2rem; }
.nav__menu a {
  font-size: .95rem; font-weight: 500; color: var(--cream);
  position: relative; transition: color .3s;
}
.nav__menu a::after {
  content: ""; position: absolute; left: 0; bottom: -6px;
  width: 0; height: 1.5px; background: var(--bronze); transition: width .3s var(--ease);
}
.nav__menu a:hover::after { width: 100%; }
.nav__cta {
  font-weight: 700; font-size: .95rem; color: var(--cream);
  border: 1px solid rgba(244,240,231,.5); padding: .55rem 1.1rem; border-radius: 2px;
  transition: all .3s;
}
.nav__cta:hover { background: var(--bronze); border-color: var(--bronze); color: var(--ink-900); }
.nav__toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 6px; }
.nav__toggle span { width: 24px; height: 2px; background: var(--cream); transition: .3s; }

/* 스크롤 후 밝은 배경 */
.nav.is-scrolled { background: rgba(244,240,231,.95); backdrop-filter: blur(10px); box-shadow: 0 1px 0 var(--line); }
.nav.is-scrolled .nav__logo,
.nav.is-scrolled .nav__menu a,
.nav.is-scrolled .nav__cta { color: var(--ink); }
.nav.is-scrolled .nav__cta { border-color: var(--line); }
.nav.is-scrolled .nav__cta:hover { color: var(--ink-900); }
.nav.is-scrolled .nav__toggle span { background: var(--ink); }

/* ---------- 히어로 ---------- */
.hero {
  position: relative; min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
  color: var(--cream); overflow: hidden;
  background: var(--ink-900); /* 사진 로딩 전/실패 시 폴백 */
}
/* 배경 사진 슬라이드쇼 */
.hero__slides { position: absolute; inset: 0; z-index: 0; overflow: hidden; }
.hero__slide {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0;
  transition: opacity 1.6s ease;
  transform: scale(1.06);
}
.hero__slide.is-active {
  opacity: 1;
  animation: kenburns 18s ease-out forwards;
}
.hero__slide.is-active:nth-child(even) { animation-name: kenburns-alt; }
@keyframes kenburns {
  from { transform: scale(1.04) translate(0,0); }
  to   { transform: scale(1.18) translate(-2%, 1%); }
}
@keyframes kenburns-alt {
  from { transform: scale(1.04) translate(0,0); }
  to   { transform: scale(1.18) translate(2%, -1.5%); }
}
/* 사진 위 오버레이 — 왼쪽(글자 쪽)은 진하게, 오른쪽(사진)은 밝게 */
.hero__bg {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    /* 좌→우 가로 그라데이션: 글자 영역만 어둡게 */
    linear-gradient(100deg,
      rgba(15,13,9,.55) 0%,
      rgba(15,13,9,.30) 35%,
      rgba(15,13,9,.08) 60%,
      rgba(15,13,9,.18) 100%),
    /* 위/아래 살짝만 어둡게 (네비·CTA 가독성) */
    linear-gradient(180deg,
      rgba(15,13,9,.25) 0%,
      transparent 22%,
      transparent 78%,
      rgba(15,13,9,.30) 100%);
}
.hero__bg::after {
  content: ""; position: absolute; inset: 0; opacity: .08;
  background-image:
    linear-gradient(rgba(244,240,231,.6) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244,240,231,.6) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(110% 90% at 70% 30%, #000, transparent 75%);
  mask-image: radial-gradient(110% 90% at 70% 30%, #000, transparent 75%);
}
.hero__content { width: min(var(--maxw), 90%); margin-inline: auto; position: relative; z-index: 2; }
.hero__eyebrow {
  font-size: .82rem; letter-spacing: .42em; font-weight: 600;
  color: var(--bronze); margin-bottom: 1.6rem;
  text-shadow: 0 1px 8px rgba(0,0,0,.55);
}
.hero__title {
  font-family: var(--serif); font-weight: 500;
  font-size: clamp(2.6rem, 7vw, 5.4rem);
  line-height: 1.15; letter-spacing: -.02em; margin-bottom: 1.8rem;
  text-shadow: 0 2px 24px rgba(0,0,0,.55), 0 0 1px rgba(0,0,0,.4);
}
.hero__title em { color: var(--bronze); font-style: normal; }
.hero__desc {
  font-size: clamp(1rem, 1.5vw, 1.15rem); color: rgba(244,240,231,.92);
  margin-bottom: 2.6rem;
  text-shadow: 0 1px 10px rgba(0,0,0,.6);
}
.hero__actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero .btn--ghost { color: var(--cream); }
.hero .btn--ghost:hover { background: var(--cream); color: var(--ink-900); border-color: var(--cream); }
.hero__scroll {
  position: absolute; bottom: 2.2rem; left: 50%; transform: translateX(-50%); z-index: 2;
  font-size: .7rem; letter-spacing: .3em; color: rgba(244,240,231,.7);
  display: flex; flex-direction: column; align-items: center; gap: .6rem;
}
.hero__scroll span {
  width: 1px; height: 46px; background: rgba(244,240,231,.5);
  position: relative; overflow: hidden;
}
.hero__scroll span::after {
  content: ""; position: absolute; top: -50%; left: 0; width: 100%; height: 50%;
  background: var(--bronze); animation: scrolldot 2s var(--ease) infinite;
}
@keyframes scrolldot { 0% { top: -50%; } 100% { top: 100%; } }

/* ---------- 회사소개 ---------- */
.about { padding: clamp(5rem, 12vw, 9rem) 0; }
.about__grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: clamp(2rem, 6vw, 6rem); }
.about__lead {
  font-family: var(--serif); font-size: clamp(1.25rem, 2.2vw, 1.7rem);
  line-height: 1.6; color: var(--ink-800); margin-bottom: 1.6rem;
}
.about__text { color: var(--ink-soft); margin-bottom: 2.8rem; }
.about__stats { display: flex; gap: clamp(1.5rem, 5vw, 3.5rem); border-top: 1px solid var(--line); padding-top: 2.2rem; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; }
.stat__num { font-family: var(--serif); font-size: clamp(2.2rem, 4vw, 3rem); font-weight: 700; color: var(--ink-800); line-height: 1; display: inline; }
.stat__plus { font-family: var(--serif); font-size: 1.5rem; color: var(--bronze); }
.stat__label { font-size: .9rem; color: var(--ink-soft); margin-top: .6rem; }

/* ---------- 사업영역 ---------- */
.services { padding: clamp(5rem, 12vw, 9rem) 0; background: var(--ink-900); color: var(--cream); }
.services .section__label { color: var(--bronze); }
.services__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: rgba(244,240,231,.14); border: 1px solid rgba(244,240,231,.14); }
.service { background: var(--ink-900); padding: 2.6rem 2rem; transition: background .4s var(--ease); }
.service:hover { background: var(--ink-800); }
.service__no { font-family: var(--serif); font-size: 1rem; color: var(--bronze); letter-spacing: .1em; }
.service h3 { font-family: var(--serif); font-weight: 500; font-size: 1.5rem; margin: 1.2rem 0 1rem; }
.service p { font-size: .95rem; color: rgba(244,240,231,.72); line-height: 1.75; }

/* ---------- 프로젝트 ---------- */
.projects { padding: clamp(5rem, 12vw, 9rem) 0; }
.projects__filter { display: flex; gap: .5rem; flex-wrap: wrap; }
.chip {
  font-family: var(--sans); font-size: .88rem; font-weight: 500;
  padding: .5rem 1.1rem; border: 1px solid var(--line); border-radius: 50px;
  background: transparent; color: var(--ink-soft); cursor: pointer; transition: all .3s;
}
.chip:hover { border-color: var(--ink-700); color: var(--ink-800); }
.chip.is-active { background: var(--ink-800); color: var(--cream); border-color: var(--ink-800); }

.projects__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.project { display: block; cursor: pointer; color: inherit; }
.project__img {
  aspect-ratio: 3/4; border-radius: 3px; overflow: hidden; position: relative;
  background: linear-gradient(155deg, var(--ink-700), var(--ink-900));
  background-size: cover; background-position: center;
  transition: transform .5s var(--ease);
}
.project__img.has-thumb::before,
.project__img.has-thumb::after { display: none; }
.project__img img { width: 100%; height: 100%; object-fit: cover; display: block; }
/* 사진이 없을 때 보이는 우아한 플레이스홀더 패턴 */
.project__img::before {
  content: ""; position: absolute; inset: 0; opacity: .5;
  background-image:
    linear-gradient(rgba(244,240,231,.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244,240,231,.18) 1px, transparent 1px);
  background-size: 28px 28px;
}
.project__img::after {
  content: "URI ARCH."; position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif); letter-spacing: .25em; font-size: .8rem;
  color: rgba(244,240,231,.45);
}
.project:hover .project__img { transform: translateY(-6px); box-shadow: 0 18px 40px -18px rgba(23,21,15,.5); }
.project__meta { display: flex; justify-content: space-between; font-size: .8rem; color: var(--bronze-dark); margin: 1rem 0 .35rem; letter-spacing: .02em; }
.project__name { font-family: var(--serif); font-weight: 500; font-size: 1.12rem; color: var(--ink); }
.project.is-hidden { display: none; }
.project--loading { opacity: .55; }
.empty-state { grid-column: 1 / -1; text-align: center; color: var(--ink-soft); padding: 3rem 1rem; line-height: 1.9; }
.empty-state a { color: var(--bronze-dark); font-weight: 600; }
.projects__more { text-align: center; margin-top: 3.5rem; }

/* ---------- 우리터 이야기 ---------- */
.story { padding: clamp(5rem, 12vw, 9rem) 0; background: var(--cream-2); }
.story__link { font-weight: 600; color: var(--ink-800); }
.story__link:hover { color: var(--bronze-dark); }
.story__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.post {
  display: block; background: var(--white); padding: 2.4rem 2rem; border-radius: 3px;
  border: 1px solid var(--line); transition: all .4s var(--ease); color: inherit;
}
.post:hover { transform: translateY(-6px); box-shadow: 0 20px 45px -22px rgba(23,21,15,.35); border-color: var(--bronze); }
.post__thumb {
  display: block; width: calc(100% + 4rem); margin: -2.4rem -2rem 1.6rem; aspect-ratio: 16/10;
  object-fit: cover; background: var(--cream-2);
}
.post__tag { display: inline-block; font-size: .76rem; letter-spacing: .15em; color: var(--bronze-dark); font-weight: 600; margin-bottom: 1rem; }
.post h3 { font-family: var(--serif); font-weight: 500; font-size: 1.3rem; margin-bottom: .8rem; line-height: 1.4; }
.post p { font-size: .93rem; color: var(--ink-soft); margin-bottom: 1.4rem; min-height: 2.5em; }
.post__date { font-size: .82rem; color: var(--bronze-dark); }
.post--loading { opacity: .55; }
.post--loading h3 { color: var(--ink-soft); }

/* ---------- 문의 ---------- */
.contact { padding: clamp(5rem, 12vw, 9rem) 0; background: var(--ink-900); color: var(--cream); }
.contact .section__label { color: var(--bronze); }
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2.5rem, 7vw, 6rem); align-items: start; }
.contact__lead { color: rgba(244,240,231,.78); margin: 1.6rem 0 2.6rem; }
.contact__list { list-style: none; display: flex; flex-direction: column; gap: 1.1rem; }
.contact__list li { display: flex; align-items: baseline; gap: 1.4rem; border-bottom: 1px solid rgba(244,240,231,.14); padding-bottom: 1.1rem; }
.contact__k { font-size: .8rem; letter-spacing: .2em; color: var(--bronze); min-width: 70px; }
.contact__list a { font-size: 1.05rem; transition: color .3s; }
.contact__list a:hover { color: var(--bronze); }

.contact__form { background: rgba(244,240,231,.05); border: 1px solid rgba(244,240,231,.14); padding: clamp(1.8rem, 4vw, 2.8rem); border-radius: 4px; }
.field { margin-bottom: 1.3rem; }
.field label { display: block; font-size: .85rem; color: rgba(244,240,231,.7); margin-bottom: .5rem; letter-spacing: .03em; }
.field input, .field select, .field textarea {
  width: 100%; font-family: var(--sans); font-size: 1rem; color: var(--cream);
  background: rgba(244,240,231,.06); border: 1px solid rgba(244,240,231,.2);
  border-radius: 3px; padding: .85rem 1rem; transition: border-color .3s;
}
.field input::placeholder, .field textarea::placeholder { color: rgba(244,240,231,.4); }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--bronze); }
.field select option { color: #1c1a16; }
.field textarea { resize: vertical; }
.contact__note { margin-top: 1rem; font-size: .9rem; color: var(--bronze); min-height: 1.2em; text-align: center; }

/* ---------- 푸터 ---------- */
.footer { background: #0f0d09; color: rgba(244,240,231,.8); padding: 3.5rem 0 2rem; }
.footer__inner { display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap; padding-bottom: 2rem; border-bottom: 1px solid rgba(244,240,231,.1); }
.footer__brand { display: flex; align-items: center; gap: .5rem; font-weight: 800; letter-spacing: .02em; color: var(--cream); flex-wrap: wrap; }
.footer__brand p { width: 100%; font-weight: 400; font-size: .9rem; color: rgba(244,240,231,.6); margin-top: .6rem; }
.footer__contact { font-size: .9rem; line-height: 1.9; text-align: right; }
.footer__copy { text-align: center; font-size: .82rem; color: rgba(244,240,231,.45); margin-top: 1.6rem; }

/* ---------- 플로팅 전화 버튼 ---------- */
.fab-call {
  position: fixed; right: 1.2rem; bottom: 1.2rem; z-index: 90;
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--bronze); color: var(--ink-900);
  display: none; align-items: center; justify-content: center;
  box-shadow: 0 10px 25px -8px rgba(0,0,0,.45);
  animation: pulse 2.4s infinite;
}
@keyframes pulse { 0%,100% { box-shadow: 0 10px 25px -8px rgba(0,0,0,.45), 0 0 0 0 rgba(176,141,87,.5);} 50% { box-shadow: 0 10px 25px -8px rgba(0,0,0,.45), 0 0 0 12px rgba(176,141,87,0);} }

/* ---------- 스크롤 리빌 애니메이션 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

/* ============================================================
   반응형
   ============================================================ */
@media (max-width: 980px) {
  .services__grid { grid-template-columns: repeat(2, 1fr); }
  .projects__grid { grid-template-columns: repeat(2, 1fr); }
  .story__grid { grid-template-columns: 1fr; }
  .about__grid, .contact__grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav__menu {
    position: fixed; inset: 76px 0 auto 0;
    flex-direction: column; gap: 0; background: var(--ink-900);
    padding: 1rem 0; transform: translateY(-120%); transition: transform .4s var(--ease);
  }
  .nav__menu.is-open { transform: translateY(0); }
  .nav__menu a { color: var(--cream) !important; padding: 1rem 8%; border-bottom: 1px solid rgba(244,240,231,.1); }
  .nav__menu a::after { display: none; }
  .nav__cta { display: none; }
  .nav__toggle { display: flex; }
  .projects__grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .footer__inner { flex-direction: column; }
  .footer__contact { text-align: left; }
  .fab-call { display: flex; }
  .section__head--row { align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}