/* =====================================================================
   base.css — 공용 디자인 시스템
   윤태웅 프로젝트 사이트 전 페이지(허브 + 상세) 공통 스타일.
   허브는 루트에서 href="base.css", 상세 페이지는 href="../base.css".
   페이지 고유 스타일이 필요하면 각 폴더의 style.css에서 덮어쓴다.
   ===================================================================== */

/* ---- Reset & 기본 타이포 ---- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #f5f5f5;
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* ---- 로고 줄 ---- */
.logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
    margin-bottom: 40px;
}

.logos img {
    height: 56px;
    object-fit: contain;
}

/* ---- 타이틀 / 히어로 섹션 ---- */
.title-section {
    text-align: center;
    background: #fff;
    padding: 50px 40px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

.title-section h1 {
    font-size: 2.4rem;
    color: #111;
    margin-bottom: 10px;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: 1.15rem;
    color: #666;
    margin-bottom: 8px;
}

.authors {
    font-size: 1.1rem;
    color: #333;
    margin-bottom: 8px;
}

.affiliation {
    font-size: 0.95rem;
    color: #666;
}

/* ---- 배지 ---- */
.badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

/* 타이틀 섹션 안의 배지는 가운데 정렬 */
.title-section .badges {
    justify-content: center;
    margin-top: 22px;
    margin-bottom: 0;
}

.badge {
    font-size: 0.78rem;
    color: #fff;
    background: #111;
    padding: 5px 12px;
    border-radius: 999px;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

/* =====================================================================
   허브(메인) 전용 — 그룹 섹션 & 프로젝트 카드
   ===================================================================== */

/* 개인/팀 그룹 구분 헤딩 */
.group-section {
    margin-bottom: 36px;
}

.group-title {
    font-size: 1.4rem;
    color: #111;
    margin-bottom: 4px;
    padding-bottom: 10px;
    border-bottom: 2px solid #111;
}

.group-desc {
    font-size: 0.9rem;
    color: #888;
    margin: 10px 0 20px;
}

.card-grid {
    display: grid;
    /* min(100%, ...) 으로 아주 좁은 화면에서도 카드가 넘치지 않고 1열로 접힘 */
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
    gap: 22px;
}

.proj-card {
    display: flex;
    flex-direction: column;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.proj-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 22px rgba(0,0,0,0.15);
}

.proj-thumb {
    aspect-ratio: 16 / 9;
    background: #000;
    overflow: hidden;
}

.proj-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.proj-thumb-text {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #111;
}

.proj-thumb-text span {
    color: #fff;
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-align: center;
    padding: 0 16px;
}

.proj-body {
    padding: 22px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.proj-body h2 {
    font-size: 1.3rem;
    color: #111;
    margin-bottom: 10px;
}

.proj-body h2 .ext {
    font-size: 0.9rem;
    color: #999;
}

.proj-body p {
    font-size: 0.92rem;
    color: #555;
    margin-bottom: 14px;
    flex: 1;
}

/* 카드 안 배지는 작게 */
.proj-body .badges {
    gap: 6px;
}

.proj-body .badge {
    font-size: 0.75rem;
    padding: 4px 10px;
}

.proj-meta {
    font-size: 0.8rem;
    color: #999;
}

/* =====================================================================
   상세 페이지 전용 — 섹션 / 표 / 스크린샷 / 기술스택 / 리소스
   ===================================================================== */

.section {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

.section h2 {
    font-size: 1.3rem;
    color: #111;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #111;
}

.section h3 {
    font-size: 1.05rem;
    color: #111;
    margin: 26px 0 12px;
}

.section-desc {
    font-size: 0.95rem;
    color: #777;
    margin-bottom: 20px;
}

.abstract {
    font-size: 1rem;
    color: #555;
    line-height: 1.8;
}

/* 순서/비순서 목록 (게임 방법, 기능 설명 등) */
.howto,
.bullets {
    padding-left: 20px;
    color: #555;
}

.howto li,
.bullets li {
    margin-bottom: 8px;
    padding-left: 4px;
}

.howto strong,
.bullets strong {
    color: #111;
}

/* 스크린샷 그리드 — 개수에 상관없이 자동 배치 */
.shot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.shot-item {
    background: #f9f9f9;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #eee;
}

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

/* 단일/세로형 이미지용 — 가운데 정렬, 폭 제한 */
.shot-grid.single {
    grid-template-columns: minmax(0, 440px);
    justify-content: center;
}

/* 세로(포트레이트) 이미지는 크롭하지 않고 원본 비율 유지 */
.shot-item.portrait img {
    aspect-ratio: auto;
    object-fit: contain;
    height: auto;
}

.shot-item img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    object-position: top;
    display: block;
    background: #f0f0f0;
    cursor: zoom-in;
}

.shot-caption {
    padding: 12px;
    font-size: 0.85rem;
    color: #333;
    text-align: center;
}

/* 데모 영상 그리드 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

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

.video-item {
    background: #f9f9f9;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #eee;
}

.video-item video,
.video-item iframe {
    width: 100%;
    aspect-ratio: 16 / 9;
    display: block;
    border: 0;
    background: #000;
}

.video-caption {
    padding: 12px;
    font-size: 0.85rem;
    color: #333;
    text-align: center;
}

/* 반응형 임베드 영상 (YouTube iframe 등) */
.video-container {
    position: relative;
    padding-top: 56.25%; /* 16:9 */
    border-radius: 8px;
    overflow: hidden;
    background: #000;
    border: 1px solid #eee;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* 코드 블록 (clone 명령 등) */
pre {
    background: #111;
    color: #f5f5f5;
    padding: 16px 18px;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'Consolas', 'Menlo', monospace;
    font-size: 0.88rem;
    line-height: 1.6;
}

pre code {
    background: none;
    color: inherit;
    padding: 0;
    font-size: inherit;
}

/* 구현 표 */
.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

table th,
table td {
    text-align: left;
    padding: 12px 14px;
    border-bottom: 1px solid #eee;
    vertical-align: top;
}

table thead th {
    background: #111;
    color: #fff;
    font-weight: 600;
}

table th:first-child,
table td:first-child {
    white-space: nowrap;
}

table tbody tr:last-child td {
    border-bottom: none;
}

code {
    font-family: 'Consolas', 'Menlo', monospace;
    font-size: 0.88em;
    background: #f0f0f0;
    color: #111;
    padding: 2px 6px;
    border-radius: 4px;
}

/* 기술 스택 그리드 */
.tech-grid {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 30px;
}

.tech-block h3 {
    margin-top: 0;
}

.tech-block ul {
    list-style: none;
}

.tech-block li {
    font-size: 0.92rem;
    color: #555;
    padding: 7px 0;
    border-bottom: 1px solid #f0f0f0;
}

.tech-block li:last-child {
    border-bottom: none;
}

.tech-block strong {
    color: #111;
}

/* 리소스 / 외부 링크 버튼 */
.resources {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.resource-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: #fff;
    color: #111;
    text-decoration: none;
    border-radius: 6px;
    border: 1px solid #ddd;
    transition: all 0.2s ease;
}

.resource-link:hover {
    background: #111;
    color: #fff;
    border-color: #111;
}

.resource-link:hover svg {
    fill: #fff;
}

.resource-link svg {
    width: 18px;
    height: 18px;
    fill: #111;
}

.resource-link span {
    font-size: 0.9rem;
}

/* =====================================================================
   Contact (공통)
   ===================================================================== */
.contact {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
}

.contact h2 {
    font-size: 1.3rem;
    color: #111;
    margin-bottom: 15px;
}

.contact p {
    color: #666;
    margin-bottom: 10px;
}

.contact a {
    color: #111;
    text-decoration: none;
    font-weight: 500;
}

.contact a:hover {
    text-decoration: underline;
}

/* =====================================================================
   반응형
   ===================================================================== */
@media (max-width: 768px) {
    .container {
        padding: 28px 16px;
    }

    .title-section {
        padding: 36px 24px;
    }

    .title-section h1 {
        font-size: 1.7rem;
    }

    .section {
        padding: 24px 20px;
    }

    .shot-grid.two-col,
    .video-grid.two-col {
        grid-template-columns: 1fr;
    }

    .tech-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .resources {
        flex-direction: column;
    }

    .logos {
        gap: 18px;
    }

    .logos img {
        height: 38px;
    }
}

@media (max-width: 480px) {
    .card-grid {
        grid-template-columns: 1fr;
    }

    .logos img {
        height: 30px;
    }
}

/* =====================================================================
   라이트박스 (이미지 클릭 확대) — lightbox.js와 함께 동작
   ===================================================================== */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.88);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease;
    cursor: zoom-out;
}

.lightbox-overlay.open {
    opacity: 1;
    visibility: visible;
}

.lightbox-overlay img {
    max-width: 95%;
    max-height: 95%;
    object-fit: contain;
    border-radius: 6px;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
    position: fixed;
    top: 16px;
    right: 24px;
    width: 44px;
    height: 44px;
    color: #fff;
    font-size: 2rem;
    line-height: 1;
    background: none;
    border: 0;
    cursor: pointer;
}