/* ===================================
   숲, 나무 그리고 집 — 미니멀 스타일
   =================================== */

:root {
    --black: #111111;
    --gray: #666666;
    --light-gray: #999999;
    --border: #e5e5e5;
    --bg: #ffffff;
    --bg-light: #f8f8f8;
    --accent: #5B7C4F;
    --font-sans: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Noto Serif KR', Georgia, serif;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 60px;
}

body {
    font-family: var(--font-sans);
    color: var(--black);
    background: var(--bg);
    line-height: 1.7;
    font-weight: 300;
    -webkit-font-smoothing: antialiased;
}

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

/* --- 컨테이너 --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container.narrow { max-width: 720px; }
.container.wide { max-width: 1400px; }

/* --- 모임 공지 / 답사 일정 (고정 섹션) --- */
.notice-stack {
    margin-top: 56px; /* nav(fixed, 56px) 아래에 자리 */
}
.notice-section {
    /* 파스텔 연두 — 연구회 식물 톤, 짙은 녹색 텍스트와 부드러운 대비 */
    background: linear-gradient(90deg, #e8f3e3, #d8ecd0);
    color: #2f5a37;
    padding: 18px 0;
}
/* 답사 일정 — 파스텔 우드 베이지 톤으로 구분 */
.notice-section.fieldtrip {
    background: linear-gradient(90deg, #f4eadb, #ecdcc4);
    color: #6e4e2e;
}
/* 공지가 보일 때는 hero 의 상단 패딩을 줄여서 자연스러운 흐름 만들기 */
body:has(.notice-section:not([hidden])) .hero { padding-top: 60px; }
.notice-section .container {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    font-size: 0.95rem;
}
.notice-section-label {
    font-weight: 700;
    letter-spacing: 0.02em;
    flex-shrink: 0;
    font-size: 1.5em;
    line-height: 1.2;
    align-self: center;
    /* 정기모임/답사 두 줄이 세로로 보일 때 본문 시작 위치를 동일하게 맞추기 위한 고정 너비 */
    min-width: 4.2em;
    text-align: center;
}
.notice-section-text {
    flex: 1;
    min-width: 0;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.notice-section-headline {
    font-weight: 700;
    font-size: 1.02em;
    letter-spacing: -0.005em;
    color: inherit;
}
.notice-section-schedule {
    font-size: 0.92em;
    color: inherit;
    opacity: 0.85;
}
.notice-section-link {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px solid currentColor;
    opacity: 0.85;
    padding-bottom: 1px;
    font-size: 0.88rem;
    flex-shrink: 0;
    transition: border-color 0.2s;
}
.notice-section-link:hover { opacity: 1; }
@media (max-width: 600px) {
    .notice-section { padding: 16px 0; }
    .notice-section .container { font-size: 0.88rem; gap: 10px; }
}

/* --- 네비게이션 --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    height: 56px;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: 0.3s;
}

.nav-logo {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-right: 60px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-menu a {
    font-size: 0.82rem;
    font-weight: 400;
    color: var(--gray);
    letter-spacing: 0.02em;
    transition: color 0.2s;
}

.nav-menu a:hover { color: var(--black); }

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    flex-direction: column;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 1.5px;
    background: var(--black);
    transition: 0.3s;
}

/* --- 히어로 --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 80px;
}

.hero-inner { max-width: 800px; }

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(1.5rem, 7vw, 4.4rem);
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: var(--black);
    margin-bottom: 18px;
    word-break: keep-all;
    white-space: nowrap;
}

.hero-en {
    font-family: var(--font-serif);
    font-size: clamp(1rem, 2.6vw, 1.7rem);
    font-weight: 400;
    font-style: italic;
    color: var(--gray);
    margin-bottom: 6px;
    letter-spacing: 0.02em;
}

.hero-en-sub {
    font-size: clamp(0.72rem, 1.6vw, 0.95rem);
    font-weight: 300;
    color: var(--light-gray);
    letter-spacing: 0.06em;
    margin-bottom: 18px;
    word-break: keep-all;
}

.hero-sub {
    font-family: var(--font-serif);
    font-size: clamp(1rem, 2.4vw, 1.3rem);
    font-weight: 500;
    color: var(--black);
    letter-spacing: 0.18em;
}

/* --- 풀 이미지 --- */
.full-image {
    width: 100%;
    overflow: hidden;
}

.full-image img {
    width: 100%;
    height: 70vh;
    object-fit: cover;
}

/* --- 섹션 --- */
.section {
    padding: 120px 24px;
}

.section-light {
    background: var(--bg-light);
}

.label {
    display: block;
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 16px;
    text-align: center;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    font-weight: 700;
    line-height: 1.4;
    letter-spacing: -0.02em;
    margin-bottom: 32px;
    text-align: center;
}

/* 메인 hero 카피: 모든 화면에서 2줄 유지, 한 줄에 들어가는 최대 폰트 */
.section-title.hero-title {
    font-size: clamp(1.2rem, 5vw, 2.4rem);
    letter-spacing: -0.04em;
    line-height: 1.5;
    word-break: keep-all;
    white-space: normal;
}
@media (max-width: 360px) {
    .section-title.hero-title { font-size: 1.15rem; letter-spacing: -0.05em; }
}

/* 메인 hero 영문 부제 (한글 타이틀 바로 아래) */
.hero-en-tagline {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: clamp(0.82rem, 1.6vw, 1.05rem);
    line-height: 1.55;
    color: var(--gray);
    text-align: center;
    margin: -16px auto 28px;
    max-width: 720px;
    word-break: keep-all;
    letter-spacing: 0.01em;
}

/* 소개 본문 영문 단락 */
.about-en {
    margin-top: 28px;
    padding-top: 24px;
    border-top: 1px solid var(--border, #e5e2dd);
    text-align: center;
}
.about-en p {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 0.92rem;
    line-height: 1.75;
    color: var(--gray);
    margin-bottom: 14px;
    word-break: keep-all;
    text-align: center;
}
.about-en p:last-child { margin-bottom: 0; }
@media (max-width: 600px) {
    .about-en p { font-size: 0.86rem; line-height: 1.7; }
}

.section-text {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--gray);
    margin-bottom: 16px;
    text-align: center;
}

.section-text.light {
    color: var(--light-gray);
}

/* --- 4열 그리드 --- */
.grid-4 {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 40px;
    margin-top: 60px;
}

.grid-item h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.grid-item p {
    font-size: 0.88rem;
    color: var(--gray);
    line-height: 1.75;
}

/* --- 인스타 그리드 --- */
.insta-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
    margin-top: 48px;
}

.insta-item {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    display: block;
    cursor: pointer;
}

.insta-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: blur(6px) brightness(0.7);
    transform: scale(1.08);
    transition: filter 0.5s ease, transform 0.5s ease;
}

.insta-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 20px;
    color: white;
    transition: opacity 0.4s ease;
    z-index: 2;
}

.insta-date {
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    margin-bottom: 8px;
    opacity: 0.7;
}

.insta-overlay h3 {
    font-size: 0.88rem;
    font-weight: 500;
    line-height: 1.5;
    letter-spacing: -0.01em;
}

/* 호버: 블러 해제, 텍스트 숨김 */
.insta-item:hover img {
    filter: blur(0) brightness(1);
    transform: scale(1);
}

.insta-item:hover .insta-overlay {
    opacity: 0;
}

/* --- 비전 --- */
.vision-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    margin-top: 48px;
    margin-bottom: 64px;
}

.vision-item {
    text-align: center;
    padding: 32px 16px;
    border: 1px solid var(--border);
    transition: all 0.2s;
    cursor: pointer;
    background: #fff;
    user-select: none;
}

.vision-item:hover {
    border-color: var(--black);
    transform: translateY(-2px);
}

.vision-item:focus { outline: 2px solid var(--accent, #a8896f); outline-offset: 2px; }

.vision-item.active {
    border-color: var(--accent, #a8896f);
    border-width: 2px;
    background: var(--bg-light, #f7f7f5);
}

.vision-play {
    display: inline-block;
    margin-top: 14px;
    margin-bottom: 4px;
    font-size: 0.78rem;
    font-weight: 600;
    color: #fff;
    background: var(--black);
    padding: 5px 12px;
    border-radius: 999px;
    letter-spacing: 0.02em;
    transition: background 0.2s;
}
.vision-item:hover .vision-play {
    background: var(--accent, #a8896f);
}

.vision-more {
    display: block;
    margin-top: 6px;
    font-size: 0.72rem;
    color: var(--accent, #a8896f);
    letter-spacing: 0.05em;
    transition: transform 0.2s;
    cursor: pointer;
    padding: 4px 0;
}
.vision-more:hover { text-decoration: underline; }
.vision-item.active .vision-more::after { content: ' (닫기)'; }

/* 영역별 상세 영역 (인라인 확장) */
.vision-detail {
    grid-column: 1 / -1;
    background: var(--bg-light, #f7f7f5);
    border: 1px solid var(--border, #e5e2dd);
    border-radius: 8px;
    padding: 36px 32px;
    margin-top: -8px;
    animation: vision-detail-open 0.3s ease;
}
@keyframes vision-detail-open {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}
.vision-detail-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
}
.vision-detail-video {
    position: sticky;
    top: 80px;
    aspect-ratio: 16 / 9;
    border-radius: 8px;
    overflow: hidden;
    background: #000;
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}
.vision-detail-video iframe {
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}
@media (max-width: 800px) {
    .vision-detail-layout { grid-template-columns: 1fr; gap: 20px; }
    .vision-detail-video { position: static; }
}
.vision-detail-inner h4 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}
.vision-detail-inner .vision-headline {
    font-size: 1rem;
    color: var(--accent, #a8896f);
    margin-bottom: 24px;
    letter-spacing: -0.01em;
}
.vision-detail-inner .vision-section {
    margin-bottom: 18px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border, #e5e2dd);
}
.vision-detail-inner .vision-section:last-of-type { border-bottom: none; }
.vision-detail-inner .vision-section > strong:first-child {
    display: block;
    font-size: 0.78rem;
    color: var(--gray);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 8px;
}
.vision-detail-inner .vision-section p strong {
    font-weight: 600;
    color: var(--black);
}
.vision-detail-inner .vision-section p,
.vision-detail-inner .vision-section ul {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--black);
}
.vision-detail-inner .vision-section ul {
    margin: 0;
    padding-left: 18px;
}
.vision-detail-inner .vision-section ul li { margin-bottom: 4px; }
.vision-detail-inner .placeholder {
    color: var(--light-gray);
    font-style: italic;
}
.vision-detail-inner .vision-cta {
    margin-top: 24px;
    padding: 16px 18px;
    background: #fff;
    border-left: 3px solid var(--accent, #a8896f);
    border-radius: 4px;
}
.vision-detail-inner .vision-cta strong {
    display: block;
    font-size: 0.88rem;
    color: var(--black);
    margin-bottom: 4px;
}
.vision-detail-inner .vision-cta p {
    font-size: 0.88rem;
    color: var(--gray);
    line-height: 1.6;
    margin: 0;
}
.vision-detail-inner .vision-cta a {
    color: var(--accent, #a8896f);
    text-decoration: underline;
}
@media (max-width: 600px) {
    .vision-detail { padding: 24px 18px; }
    .vision-detail-inner h4 { font-size: 1.2rem; }
}

.vision-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: 16px;
}

.vision-svg {
    width: 40px;
    height: 40px;
    margin: 0 auto 16px;
    display: block;
    color: var(--black);
    opacity: 0.7;
}

.vision-item:hover .vision-svg {
    opacity: 1;
}

.vision-item h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 10px;
}

.vision-item p {
    font-size: 0.82rem;
    color: var(--gray);
    line-height: 1.7;
}

/* 로드맵 */
.roadmap-title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 700;
    text-align: center;
    margin: 56px 0 16px;
    letter-spacing: -0.01em;
}

.roadmap {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 16px;
}

.roadmap-item {
    padding: 20px 18px;
    border: 1px solid var(--border, #e5e2dd);
    border-radius: 6px;
    background: #fff;
    transition: border-color 0.2s, transform 0.2s;
}
.roadmap-item:hover {
    border-color: var(--black);
    transform: translateY(-2px);
}
.roadmap-item[data-status="done"] {
    background: #f4f8f4;
    border-color: #c8dec8;
}
.roadmap-item[data-status="active"] {
    background: #fffaf2;
    border-color: var(--accent, #a8896f);
}

.roadmap-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}
.roadmap-item h4 {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 700;
    margin: 0;
    color: var(--black);
}
.roadmap-status {
    font-size: 0.68rem;
    padding: 2px 8px;
    border-radius: 99px;
    letter-spacing: 0.05em;
    white-space: nowrap;
    background: var(--bg-light, #f7f7f5);
    color: var(--gray);
}
.roadmap-item[data-status="done"] .roadmap-status {
    background: #d4ead4;
    color: #1f6b1f;
    font-weight: 600;
}
.roadmap-item[data-status="active"] .roadmap-status {
    background: #ffe6c2;
    color: #8b5a00;
    font-weight: 600;
}

.roadmap-bar {
    height: 6px;
    background: var(--bg-light, #f7f7f5);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 12px;
}
.roadmap-bar-fill {
    display: block;
    height: 100%;
    width: var(--progress, 0%);
    background: var(--accent, #a8896f);
    border-radius: 3px;
    transition: width 0.6s ease;
}
.roadmap-item[data-status="done"] .roadmap-bar-fill {
    background: #4ea64e;
}

.roadmap-item p {
    font-size: 0.82rem;
    color: var(--gray);
    line-height: 1.6;
    margin: 0;
}

@media (max-width: 768px) {
    .roadmap { grid-template-columns: repeat(2, 1fr); gap: 16px; }
}
@media (max-width: 480px) {
    .roadmap { grid-template-columns: 1fr; }
}

/* 사진 없는 항목 */
.insta-item.no-photo {
    background: linear-gradient(135deg, #e8e4df 0%, #d5cfc7 100%);
}

.insta-item.no-photo .insta-overlay {
    opacity: 1;
    background: rgba(0,0,0,0.15);
}

.insta-item.no-photo .insta-overlay h3 {
    font-size: 0.82rem;
}

.insta-item.no-photo:hover .insta-overlay {
    background: rgba(0,0,0,0.4);
    opacity: 1;
}

/* 페이지네이션 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 32px;
    padding-bottom: 16px;
}

.pagination button {
    padding: 8px 16px;
    border: 1px solid var(--border);
    background: transparent;
    font-family: var(--font-sans);
    font-size: 0.8rem;
    color: var(--gray);
    cursor: pointer;
    transition: all 0.2s;
}

.pagination button:hover {
    border-color: var(--black);
    color: var(--black);
}

.pagination button.active {
    background: var(--black);
    color: white;
    border-color: var(--black);
}

.pagination button:disabled {
    opacity: 0.3;
    cursor: default;
}

/* --- 활동 상세 모달 --- */
.history-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: #ffffff;
    overflow-y: auto;
    padding: 0;
}

.history-modal.active {
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.modal-inner {
    max-width: 900px;
    width: 100%;
    margin: 40px auto;
    padding: 0 24px 60px;
    color: var(--black);
}

.modal-close {
    position: fixed;
    top: 20px;
    right: 24px;
    width: 44px;
    height: 44px;
    background: rgba(0,0,0,0.06);
    border: none;
    border-radius: 50%;
    color: var(--black);
    font-size: 1.4rem;
    cursor: pointer;
    z-index: 2001;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.modal-close:hover {
    background: rgba(0,0,0,0.12);
}

.modal-date {
    font-size: 0.78rem;
    color: var(--light-gray);
    letter-spacing: 0.1em;
    margin-top: 60px;
    margin-bottom: 12px;
}

.modal-title {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.4;
    color: var(--black);
}

.modal-desc {
    font-size: 0.92rem;
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 32px;
}

.modal-photos {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.modal-photos img {
    width: 100%;
    border-radius: 2px;
    object-fit: cover;
}

/* --- 연구자료 리스트 --- */
.resource-list {
    list-style: none;
    margin-top: 40px;
}

.resource-list li {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
}

.resource-list li:first-child {
    border-top: 1px solid var(--border);
}

.resource-title {
    font-size: 0.95rem;
    font-weight: 400;
}

.resource-meta {
    font-size: 0.8rem;
    color: var(--light-gray);
    flex-shrink: 0;
    margin-left: 24px;
}

/* --- 참여 안내 --- */
.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    margin-top: 48px;
}

.info-item {
    padding: 24px 0;
    border-top: 1px solid var(--border);
}

.info-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--light-gray);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}

.info-value {
    font-size: 0.95rem;
    font-weight: 400;
}

/* --- 작품 모자이크 --- */
.works-mosaic {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 4px;
    margin-top: 48px;
}

.works-tile {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    cursor: pointer;
    background: linear-gradient(135deg, #e8e4df 0%, #d5cfc7 100%);
    /* 화면 밖 타일 렌더링·디코딩 비용 절약 (모바일 성능 개선) */
    content-visibility: auto;
    contain-intrinsic-size: 200px 200px;
}

.works-tile img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.works-tile:hover img {
    transform: scale(1.04);
}

/* 이름은 항상 하단에 표시 (hover 효과 제거) */
.works-tile-overlay {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    text-align: center;
    padding: 24px 10px 10px;
    color: white;
    background: linear-gradient(to top, rgba(0,0,0,0.78) 0%, rgba(0,0,0,0) 100%);
    z-index: 2;
    opacity: 1;
}

.works-tile-name {
    font-size: 0.85rem;
    font-weight: 500;
    line-height: 1.2;
}

/* 부가 텍스트는 숨김 (이름만 표시) */
.works-tile-project {
    display: none;
}

/* 사진 없는 타일: 항상 이름 표시 (hover 효과 없음) */
.works-tile.no-photo .works-tile-overlay {
    inset: 0;
    bottom: auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    color: var(--gray);
    padding: 12px;
    opacity: 1;
    transform: none;
}

/* --- 건축사 인라인 확장 (인스타그램 스타일) --- */
.works-tile.active {
    outline: 3px solid var(--accent, #a8896f);
    outline-offset: -3px;
}
.works-expansion {
    grid-column: 1 / -1;
    background: var(--bg-light, #f7f7f5);
    padding: 28px 24px;
    border-top: 1px solid var(--border, #e5e2dd);
    border-bottom: 1px solid var(--border, #e5e2dd);
    animation: expansion-open 0.3s ease;
}
@keyframes expansion-open {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}
.works-expansion-title {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 18px;
    gap: 12px;
}
.works-expansion-title h3 {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--black);
    margin: 0;
}
.works-expansion-title .firm {
    font-size: 0.85rem;
    color: var(--gray);
    margin-left: 8px;
}
.works-expansion-close {
    background: none;
    border: none;
    font-size: 1.6rem;
    line-height: 1;
    cursor: pointer;
    color: var(--gray);
    padding: 0 4px;
}
.works-expansion-close:hover { color: var(--black); }
.works-expansion-website {
    font-size: 0.82rem;
    color: var(--accent, #a8896f);
    text-decoration: none;
    border-bottom: 1px dashed currentColor;
    margin-left: auto;
    padding-bottom: 1px;
    white-space: nowrap;
    transition: color 0.15s;
}
.works-expansion-website:hover { color: var(--black); }
.works-expansion-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 4px;
}
.works-expansion-item {
    position: relative;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    cursor: pointer;
    background: linear-gradient(135deg, #e8e4df 0%, #d5cfc7 100%);
}
.works-expansion-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.works-expansion-item:hover img { transform: scale(1.05); }
.works-expansion-item-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.65) 0%, rgba(0,0,0,0) 50%);
    display: flex;
    align-items: flex-end;
    padding: 8px 10px;
    color: #fff;
    opacity: 0;
    transition: opacity 0.2s;
    font-size: 0.78rem;
    line-height: 1.3;
}
.works-expansion-item:hover .works-expansion-item-overlay { opacity: 1; }
.works-expansion-empty {
    color: var(--gray);
    font-size: 0.9rem;
    text-align: center;
    padding: 30px 0;
}
@media (max-width: 600px) {
    .works-expansion { padding: 20px 12px; }
    .works-expansion-grid { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); }
}

/* 작품 상세 모달 내 정보 */
.works-detail {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    margin-bottom: 24px;
    border-top: 1px solid var(--border);
}

.works-detail-item {
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
}

.works-detail-label {
    display: block;
    font-size: 0.68rem;
    color: var(--light-gray);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 4px;
}

.works-detail-value {
    font-size: 0.88rem;
    color: var(--black);
}

/* --- 자료실 필터 --- */
.lib-filter {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.lib-filter-btn {
    padding: 6px 16px;
    border: 1px solid var(--border);
    background: transparent;
    font-family: var(--font-sans);
    font-size: 0.78rem;
    color: var(--gray);
    cursor: pointer;
    transition: all 0.2s;
}

.lib-filter-btn:hover,
.lib-filter-btn.active {
    border-color: var(--black);
    color: var(--black);
}

/* 자료 아이템 */
.lib-item {
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
}

.lib-item-info { flex: 1; }

.lib-item-category {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.05em;
    margin-bottom: 6px;
}

.lib-item-title {
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 4px;
}

.lib-item-desc {
    font-size: 0.82rem;
    color: var(--gray);
    margin-bottom: 6px;
}

.lib-item-meta {
    font-size: 0.75rem;
    color: var(--light-gray);
}

.lib-item-download {
    flex-shrink: 0;
    padding: 8px 20px;
    border: 1px solid var(--border);
    font-size: 0.78rem;
    color: var(--gray);
    transition: all 0.2s;
    align-self: center;
}

.lib-item-download:hover {
    border-color: var(--black);
    color: var(--black);
}

/* --- 게시판 --- */
.write-btn {
    display: inline-block;
    padding: 10px 32px;
    border: 1px solid var(--black);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.03em;
    transition: all 0.2s;
    margin-bottom: 48px;
}

.write-btn:hover {
    background: var(--black);
    color: white;
}

.board-list {
    border-top: 1px solid var(--black);
}

.board-loading {
    padding: 40px 0;
    text-align: center;
    color: var(--light-gray);
    font-size: 0.88rem;
}

.board-empty {
    padding: 60px 0;
    text-align: center;
    color: var(--light-gray);
    font-size: 0.9rem;
}

.board-post {
    padding: 24px 0;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background 0.2s;
}

.board-post:hover {
    background: var(--bg-light);
    margin: 0 -16px;
    padding: 24px 16px;
}

.board-post-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 8px;
    gap: 16px;
}

.board-post-title {
    font-size: 1rem;
    font-weight: 500;
    flex: 1;
}

.board-post-date {
    font-size: 0.75rem;
    color: var(--light-gray);
    flex-shrink: 0;
}

.board-post-author {
    font-size: 0.8rem;
    color: var(--gray);
    margin-bottom: 6px;
}

.board-post-body {
    font-size: 0.88rem;
    color: var(--gray);
    line-height: 1.7;
    white-space: pre-wrap;
}

.board-post-body.collapsed {
    max-height: 3.4em;
    overflow: hidden;
}

.board-post-toggle {
    display: inline-block;
    margin-top: 8px;
    font-size: 0.8rem;
    color: var(--accent);
    cursor: pointer;
    border: none;
    background: none;
    padding: 0;
    font-family: var(--font-sans);
}

.board-post-toggle:hover {
    text-decoration: underline;
}

/* --- 문의 폼 --- */
.form-title {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 14px;
}

.form-desc {
    font-size: 0.92rem;
    line-height: 1.7;
    color: var(--gray);
    margin-bottom: 28px;
}

/* 문의 피드 (최근 10개 1줄씩) */
.inquiry-feed {
    list-style: none;
    padding: 0;
    margin: 36px 0 0;
    border-top: 1px solid var(--border, #e5e2dd);
}
.inquiry-feed-loading,
.inquiry-feed-empty {
    padding: 18px 4px;
    color: var(--light-gray);
    font-size: 0.85rem;
    text-align: center;
}
.inquiry-row {
    display: grid;
    grid-template-columns: 80px 1fr auto;
    align-items: baseline;
    gap: 12px;
    padding: 14px 4px;
    border-bottom: 1px solid var(--border, #e5e2dd);
    cursor: pointer;
    transition: background 0.15s;
}
.inquiry-row:hover { background: rgba(0,0,0,0.02); }
.inquiry-row .inquiry-name {
    font-size: 0.82rem;
    color: var(--black);
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.inquiry-row .inquiry-msg {
    font-size: 0.92rem;
    color: var(--black);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.inquiry-row .inquiry-status {
    font-size: 0.7rem;
    color: var(--gray);
    letter-spacing: 0.05em;
    white-space: nowrap;
}
.inquiry-row .inquiry-status.answered { color: #1f6b1f; font-weight: 600; }
.inquiry-row .inquiry-status.open { color: #b76b00; }

/* 펼친 상세: 한 줄 아래에 답변 표시 */
.inquiry-detail {
    padding: 12px 16px 16px;
    background: #fafaf8;
    border-bottom: 1px solid var(--border, #e5e2dd);
    font-size: 0.88rem;
    line-height: 1.65;
}
.inquiry-detail .q { color: var(--black); white-space: pre-wrap; word-wrap: break-word; }
.inquiry-detail .a {
    margin-top: 10px;
    padding: 10px 12px;
    background: #fff;
    border-left: 3px solid var(--accent, #a8896f);
    color: var(--black);
    white-space: pre-wrap;
    word-wrap: break-word;
}
.inquiry-detail .a-meta {
    display: block;
    font-size: 0.72rem;
    color: var(--gray);
    margin-top: 6px;
}
.inquiry-detail .no-answer {
    margin-top: 8px;
    font-size: 0.82rem;
    color: var(--light-gray);
    font-style: italic;
}
@media (max-width: 600px) {
    .inquiry-row { grid-template-columns: 64px 1fr auto; gap: 8px; padding: 12px 2px; }
    .inquiry-row .inquiry-name { font-size: 0.78rem; }
    .inquiry-row .inquiry-msg { font-size: 0.86rem; }
}

/* 건축사 직접 문의 칩 */
.architect-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 8px;
}
.architect-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border: 1px solid var(--border, #e5e2dd);
    border-radius: 999px;
    background: #fff;
    font-size: 0.82rem;
    color: var(--black);
    cursor: pointer;
    transition: all 0.15s;
    line-height: 1.2;
    white-space: nowrap;
}
.architect-chip:hover { background: var(--black); color: #fff; border-color: var(--black); }
.architect-chip.active { background: var(--accent, #a8896f); color: #fff; border-color: var(--accent, #a8896f); }

/* 선택된 건축사 문의 폼 */
.architect-form {
    margin-top: 14px;
    padding: 16px;
    background: #fafaf8;
    border-radius: 6px;
    border: 1px solid var(--border, #e5e2dd);
    display: none;
}
.architect-form.active { display: block; }
.architect-form .target-label {
    font-size: 0.85rem;
    color: var(--gray);
    margin-bottom: 10px;
}
.architect-form .target-label strong { color: var(--accent, #a8896f); }
.architect-form input[type="text"],
.architect-form textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border, #e5e2dd);
    border-radius: 4px;
    font-size: 0.92rem;
    font-family: inherit;
    box-sizing: border-box;
    margin-bottom: 8px;
}
.architect-form textarea { min-height: 90px; line-height: 1.55; resize: vertical; }
.architect-form button {
    padding: 8px 18px;
    background: var(--black);
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 0.88rem;
    cursor: pointer;
}
.architect-form button:disabled { opacity: 0.5; }
.architect-form .msg { font-size: 0.82rem; margin-top: 8px; }

/* 직접 문의 피드 — 일반 inquiry-row와 동일 스타일이지만 targetName 컬럼 추가 */
.architect-row {
    display: grid;
    grid-template-columns: 100px 1fr 70px auto;
    gap: 12px;
    padding: 14px 4px;
    border-bottom: 1px solid var(--border, #e5e2dd);
    cursor: pointer;
    align-items: baseline;
    transition: background 0.15s;
}
.architect-row:hover { background: rgba(0,0,0,0.02); }
.architect-row .from-name { font-size: 0.82rem; color: var(--black); font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.architect-row .to-target { font-size: 0.78rem; color: var(--accent, #a8896f); font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.architect-row .msg-preview { font-size: 0.92rem; color: var(--black); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.architect-row .status-badge { font-size: 0.7rem; letter-spacing: 0.05em; white-space: nowrap; }
.architect-row .status-badge.answered { color: #1f6b1f; font-weight: 600; }
.architect-row .status-badge.open { color: #b76b00; }
@media (max-width: 600px) {
    .architect-row { grid-template-columns: 70px 1fr 50px; gap: 8px; padding: 12px 2px; }
    .architect-row .to-target { display: none; }
    .architect-row .from-name { font-size: 0.78rem; }
    .architect-row .msg-preview { font-size: 0.86rem; }
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 0;
    border: none;
    border-bottom: 1px solid var(--border);
    background: transparent;
    font-family: var(--font-sans);
    font-size: 0.92rem;
    font-weight: 300;
    color: var(--black);
    outline: none;
    transition: border-color 0.2s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-bottom-color: var(--black);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--light-gray);
}

.contact-form textarea {
    resize: none;
}

.contact-form button {
    align-self: flex-start;
    padding: 12px 40px;
    background: var(--black);
    color: white;
    border: none;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: opacity 0.2s;
    margin-top: 8px;
}

.contact-form button:hover {
    opacity: 0.7;
}

/* --- 푸터 --- */
.footer {
    padding: 40px 24px;
    text-align: center;
    border-top: 1px solid var(--border);
}

.footer p {
    font-size: 0.75rem;
    color: var(--light-gray);
    letter-spacing: 0.03em;
}

/* --- 애니메이션 --- */
.fade-up {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- 반응형 --- */
/* 좁은 데스크탑(<=1024px)에서도 9개 메뉴 + 로그인 영역이 한 줄에 안 들어가므로 햄버거 메뉴로 전환 */
@media (max-width: 1024px) {
    .nav { padding: 0 20px; }

    .nav-menu {
        display: none;
        position: absolute;
        top: 56px;
        left: 0;
        right: 0;
        background: var(--bg);
        flex-direction: column;
        padding: 24px 20px;
        gap: 20px;
        border-bottom: 1px solid var(--border);
    }

    .nav-menu.active { display: flex; }
    .nav-toggle { display: flex; }

    .nav-toggle.active span:first-child {
        transform: rotate(45deg) translate(3px, 3px);
    }
    .nav-toggle.active span:last-child {
        transform: rotate(-45deg) translate(3px, -3px);
    }

    .hero { min-height: 80vh; padding: 100px 24px 60px; }
    .hero-title { font-size: 2.8rem; }

    .section { padding: 80px 24px; }

    .grid-4 {
        grid-template-columns: 1fr;
        gap: 32px;
        margin-top: 40px;
    }

    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .works-mosaic {
        grid-template-columns: repeat(3, 1fr);
    }

    .works-detail {
        grid-template-columns: 1fr;
    }

    .vision-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .roadmap {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .insta-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .pagination {
        flex-wrap: wrap;
    }

    .resource-list li {
        flex-direction: column;
        gap: 4px;
    }

    .resource-meta {
        margin-left: 0;
    }

    .full-image img {
        height: 50vh;
    }
}

/* --- 링크 복사 플로팅 버튼 --- */
.share-fab {
    position: fixed;
    right: 24px;
    bottom: 24px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 18px;
    background: var(--black);
    color: white;
    border: none;
    border-radius: 999px;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    cursor: pointer;
    box-shadow: 0 6px 24px rgba(0,0,0,0.18);
    z-index: 1500;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.share-fab:hover {
    background: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(0,0,0,0.22);
}

.share-fab svg {
    flex-shrink: 0;
}

.share-fab-label {
    white-space: nowrap;
}

.share-toast {
    position: fixed;
    right: 24px;
    bottom: 84px;
    padding: 10px 16px;
    background: rgba(17,17,17,0.92);
    color: white;
    border-radius: 6px;
    font-size: 0.82rem;
    box-shadow: 0 4px 16px rgba(0,0,0,0.18);
    z-index: 1500;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.25s ease, transform 0.25s ease;
    pointer-events: none;
}

.share-toast.show {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 600px) {
    .share-fab {
        right: 16px;
        bottom: 16px;
        padding: 10px 14px;
        font-size: 0.78rem;
    }
    .share-fab-label {
        display: none;
    }
    .share-toast {
        right: 16px;
        bottom: 70px;
    }
}


/* ============ 회원 소통방 (member chat) ============ */
.chat-guard {
    text-align: center;
    padding: 40px 24px;
    background: var(--bg-light, #f7f7f5);
    border: 1px solid var(--border, #e5e2dd);
    border-radius: 8px;
}
.chat-guard p {
    color: var(--gray);
    margin-bottom: 16px;
    font-size: 0.95rem;
}
.chat-guard a {
    display: inline-block;
    padding: 10px 24px;
    background: var(--black);
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    font-size: 0.9rem;
}
.chat-guard a:hover { opacity: 0.85; }

.chat-box {
    border: 1px solid var(--border, #e5e2dd);
    border-radius: 8px;
    background: #fafaf8;
    overflow: hidden;
}
.chat-list {
    min-height: 280px;
    max-height: 480px;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.chat-msg {
    display: flex;
    flex-direction: column;
    max-width: 75%;
    position: relative;
}
.chat-msg.mine { align-self: flex-end; align-items: flex-end; }
.chat-msg.theirs { align-self: flex-start; align-items: flex-start; }
.chat-author {
    font-size: 0.72rem;
    color: var(--gray);
    margin-bottom: 2px;
    padding: 0 4px;
}
.chat-bubble {
    padding: 8px 12px;
    border-radius: 14px;
    font-size: 0.92rem;
    line-height: 1.5;
    white-space: pre-wrap;
    word-wrap: break-word;
    background: #fff;
    border: 1px solid var(--border, #e5e2dd);
    color: var(--black);
    position: relative;
}
.chat-msg.mine .chat-bubble {
    background: var(--black);
    color: #fff;
    border-color: var(--black);
    border-bottom-right-radius: 4px;
}
.chat-msg.theirs .chat-bubble { border-bottom-left-radius: 4px; }
.chat-time {
    font-size: 0.68rem;
    color: var(--light-gray);
    margin-top: 2px;
    padding: 0 4px;
}
.chat-msg .chat-delete {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 22px;
    height: 22px;
    border: none;
    border-radius: 50%;
    background: rgba(0,0,0,0.55);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    opacity: 0.45;
    transition: opacity 0.15s, background 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}
.chat-msg.mine:hover .chat-delete,
.chat-msg.mine:focus-within .chat-delete { opacity: 1; }
.chat-msg .chat-delete:hover { background: #c33; opacity: 1; }
@media (hover: none) {
    /* 터치 기기: 항상 보이게 */
    .chat-msg .chat-delete { opacity: 1; }
}
.chat-empty {
    text-align: center;
    color: var(--light-gray);
    padding: 30px 0;
    font-size: 0.88rem;
}
.chat-input-row {
    display: flex;
    gap: 8px;
    padding: 10px;
    border-top: 1px solid var(--border, #e5e2dd);
    background: #fff;
}
.chat-input-row textarea {
    flex: 1;
    min-height: 38px;
    max-height: 140px;
    padding: 8px 12px;
    border: 1px solid var(--border, #e5e2dd);
    border-radius: 18px;
    font-size: 0.92rem;
    font-family: inherit;
    line-height: 1.4;
    resize: none;
    box-sizing: border-box;
}
.chat-input-row textarea:focus { outline: none; border-color: var(--black); }
.chat-input-row button {
    padding: 8px 18px;
    background: var(--black);
    color: #fff;
    border: none;
    border-radius: 18px;
    font-size: 0.85rem;
    cursor: pointer;
    white-space: nowrap;
}
.chat-input-row button:disabled { opacity: 0.4; cursor: not-allowed; }


/* ═══════════════════════════════════════════════════════════════
   비전 동영상 섹션 (Vision in Motion)
   ═══════════════════════════════════════════════════════════════ */

.section-videos {
    background: #F4ECDC;
}

.vv-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 24px;
}

@media (min-width: 1024px) {
    .vv-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 600px) {
    .vv-grid { grid-template-columns: 1fr; }
}

.vv-card {
    position: relative;
    aspect-ratio: 16 / 10;
    border-radius: 4px;
    overflow: hidden;
    text-decoration: none;
    color: #FAF6EC;
    display: block;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    cursor: pointer;
}

.vv-card:hover,
.vv-card:focus {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(31, 58, 46, 0.25);
    outline: none;
}

.vv-thumb {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transition: transform 0.6s ease;
}

.vv-card:hover .vv-thumb { transform: scale(1.05); }

.vv-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.10) 0%,
        rgba(0, 0, 0, 0.25) 50%,
        rgba(0, 0, 0, 0.78) 100%
    );
}

.vv-play {
    position: absolute;
    top: 18px;
    right: 18px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1.4px solid rgba(255, 255, 255, 0.78);
    background: rgba(0, 0, 0, 0.28);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.vv-play::before {
    content: '';
    display: block;
    margin-left: 4px;
    border-left: 10px solid #fff;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
}

.vv-caption {
    position: absolute;
    left: 20px;
    right: 20px;
    bottom: 18px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    z-index: 2;
}

.vv-en {
    font-size: 10px;
    letter-spacing: 0.32em;
    font-weight: 400;
    opacity: 0.92;
}

.vv-ko {
    font-size: 22px;
    font-weight: 700;
    line-height: 1.1;
    margin: 2px 0;
    letter-spacing: -0.01em;
}

.vv-tag {
    font-size: 12px;
    font-weight: 300;
    opacity: 0.88;
}

.vv-hint {
    margin-top: 18px;
    text-align: center;
    font-size: 12px;
    color: #6B6358;
    letter-spacing: 0.04em;
}

/* 영역별 액센트 컬러 (좌측 띠) */
.vv-card[data-area]::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 4px;
    z-index: 3;
}

.vv-card[data-area="public"]::before      { background: #5A8C6A; }
.vv-card[data-area="private"]::before     { background: #C26A2E; }
.vv-card[data-area="industry"]::before    { background: #7A6B52; }
.vv-card[data-area="publication"]::before { background: #8C5A2A; }

/* 영상 라이트박스 (풀스크린 모달) */
.video-lightbox {
    position: fixed;
    inset: 0;
    background: #ffffff;
    z-index: 9999;
    display: none;
    opacity: 0;
    transition: opacity 0.4s ease;
}
.video-lightbox.active {
    display: block;
    opacity: 1;
}
.video-lightbox.closing {
    display: block;
    opacity: 0;
    transition: opacity 1.8s ease 0.4s;
}
.video-lightbox.closing iframe {
    opacity: 0;
    transition: opacity 0.6s ease;
}
.video-lightbox iframe { transition: opacity 0.4s ease; }

/* Hero 재생 버튼 (아이콘만, 작고 흐리게) */
.hero-play-btn {
    margin-top: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    background: transparent;
    border: none;
    color: rgba(0, 0, 0, 0.45);
    cursor: pointer;
    opacity: 0.55;
    transition: opacity 0.3s ease, color 0.3s ease, transform 0.3s ease;
}
.hero-play-btn svg { width: 22px; height: 22px; }
.hero-play-btn:hover {
    opacity: 1;
    color: rgba(0, 0, 0, 0.85);
    transform: translateY(-1px);
}
.video-lightbox iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: none;
    background: #000;
}
.video-lightbox-close {
    position: absolute;
    top: 18px;
    right: 18px;
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    z-index: 2;
    backdrop-filter: blur(8px);
    transition: background 0.2s, transform 0.2s;
}
.video-lightbox-close:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(1.05);
}
@media (max-width: 600px) {
    .video-lightbox-close { top: 12px; right: 12px; width: 38px; height: 38px; font-size: 20px; }
}

/* AI for Architects */
#ai { padding-top: 48px; padding-bottom: 120px; }
#works { padding-bottom: 60px; }
#resources { padding-top: 120px; }
#ai .ai-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-top: 16px;
}
#ai .ai-card {
    background: #fff;
    border: 1px solid var(--border, #e5e2dd);
    border-radius: 8px;
    padding: 28px 24px;
    transition: box-shadow 0.25s ease, transform 0.25s ease;
}
#ai .ai-card:hover {
    box-shadow: 0 8px 24px rgba(0,0,0,0.06);
    transform: translateY(-2px);
}
#ai .ai-card h3 {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    color: var(--black);
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}
#ai .ai-card > p {
    font-size: 0.92rem;
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 12px;
}
#ai .ai-card ul {
    list-style: disc;
    padding-left: 18px;
    margin: 0;
}
#ai .ai-card ul li {
    font-size: 0.9rem;
    color: var(--black);
    line-height: 1.7;
    margin-bottom: 4px;
    word-break: keep-all;
    overflow-wrap: break-word;
}
#ai .ai-card > p { word-break: keep-all; overflow-wrap: break-word; }
#ai .ai-note {
    margin-top: 36px;
    padding: 20px 24px;
    background: #fff;
    border-left: 3px solid var(--accent, #a8896f);
    border-radius: 4px;
}
#ai .ai-note p {
    font-size: 0.92rem;
    color: var(--black);
    line-height: 1.7;
    margin: 0;
}
#ai .ai-note a { color: var(--accent, #a8896f); text-decoration: underline; }