:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --card-bg: #ffffff;
    --card-border: rgba(0, 0, 0, 0.125);
    --card-shadow: rgba(0, 0, 0, 0.1);
    --navbar-bg: #212529;
    --navbar-text: #ffffff;
    --footer-bg: #212529;
    --footer-text: #ffffff;
    --hero-bg: #f8f9fa;
    --overlay-bg: rgba(0, 0, 0, 0.4);
    --overlay-text: #ffffff;
}

/* 테마 적용 스타일 */
body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
    font-family: 'Noto Sans KR', sans-serif;
}

.bg-light {
    background-color: var(--bg-secondary) !important;
}

.text-muted {
    color: var(--text-secondary) !important;
}

.card {
    background-color: var(--card-bg);
    border-color: var(--card-border);
}

.shadow-sm {
    box-shadow: 0 .125rem .25rem var(--card-shadow) !important;
}

.navbar-dark {
    background-color: var(--navbar-bg) !important;
}

.navbar-dark .navbar-brand {
    color: var(--navbar-text);
}

footer {
    background-color: var(--footer-bg) !important;
    color: var(--footer-text) !important;
}

/* Hero 섹션 강화 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 100px;
    overflow: hidden;
    z-index: 1;
}

/* 파티클 배경 */
.hero-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
}

/* 인트로 텍스트 스타일링 */
.intro-lead-in {
    display: inline-block;
    font-size: 1rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 2px;
    background-color: rgba(13, 110, 253, 0.1);
    color: var(--bs-primary);
    padding: 0.5rem 1rem;
    border-radius: 30px;
    margin-bottom: 1.5rem;
}

.intro-text h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.intro-description {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.intro-buttons {
    margin-top: 2rem;
}

.waving-hand {
    display: inline-block;
    animation: wave 2.5s infinite;
    transform-origin: 70% 70%;
}

@keyframes wave {
    0% {
        transform: rotate(0deg);
    }
    10% {
        transform: rotate(14deg);
    }
    20% {
        transform: rotate(-8deg);
    }
    30% {
        transform: rotate(14deg);
    }
    40% {
        transform: rotate(-4deg);
    }
    50% {
        transform: rotate(10deg);
    }
    60% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(0deg);
    }
}

/* 하단 곡선 모양 디바이더 */
.hero-shape-divider {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
}

.hero-shape-divider svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 60px;
}

.hero-shape-divider .shape-fill {
    fill: var(--bg-secondary);
}

/* 반응형 */
@media (max-width: 768px) {
    .intro-text h1 {
        font-size: 2.5rem;
    }

    .intro-description {
        font-size: 1.1rem;
    }

    .intro-buttons .btn {
        display: block;
        width: 100%;
        margin-bottom: 1rem;
    }
}

/* 기본 스타일 */
.project-img {
    object-fit: cover;
    cursor: pointer;
}

/* 스크롤 시 고정 내비게이션 */
.navbar {
    transition: all 0.3s ease;
}

.navbar.sticky {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
}

.navbar-dummy {
    display: none;
    height: 0;
}

.navbar-dummy.active {
    display: block;
    height: 56px; /* 내비게이션 높이와 동일하게 조정 */
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s ease;
    font-weight: 500;
    padding: 0.5rem 1rem;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: #fff;
}

/* 스크롤 인디케이터 */
.scroll-indicator-container {
    position: fixed;
    top: 56px;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 1000;
    background-color: transparent;
}

.scroll-indicator {
    height: 100%;
    width: 0;
    background-color: #0d6efd;
    transition: width 0.1s ease;
}

/* Hero 섹션 배경 강화 */
.hero {
    background: linear-gradient(120deg, var(--hero-bg) 0%, var(--hero-bg) 100%);
    position: relative;
    overflow: hidden;
    padding: 100px 0;
}

/* 빛나는 요소 추가 */
.hero::after {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0) 70%);
    border-radius: 50%;
    top: -100px;
    right: -100px;
    z-index: 1;
}

/* 인트로 텍스트 스타일 강화 */
.intro-text {
    position: relative;
    z-index: 2;
    font-size: 2.2rem;
    font-weight: 700;
    text-align: center;
    margin-top: 40px;
    margin-bottom: 30px;
    color: var(--text-primary);
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.intro-text span {
    display: block;
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-top: 0.8rem;
}

/* 이모지 애니메이션 */
.waving-hand {
    display: inline-block;
    animation: wave 2.5s infinite;
    transform-origin: 70% 70%;
}

.image-overlay-wrapper {
    position: relative;
}

.overlay-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    color: var(--overlay-text);
    font-size: 1.3rem;
    font-weight: bold;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.8);
    text-align: center;
    background: var(--overlay-bg);
    padding: 20px;
    border-radius: 12px;
    pointer-events: none;
}

.project-card {
    border-radius: 12px;
    transition: transform 0.3s ease;
    height: 100%;
    min-height: 350px;
}

.project-card:hover {
    transform: scale(1.02);
}

.card-body {
    height: 130px;
    display: flex;
    flex-direction: column;
}

.card-title {
    margin-bottom: 0.5rem;
    height: 24px;
    overflow: hidden;
}

.card-text {
    flex-grow: 1;
    overflow: hidden;
}

.project-img {
    height: 220px;
    object-fit: cover;
    filter: brightness(0.8);
}

/* 기술 스택 태그 색상 차별화 */
.tech-tag {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    border-radius: 18px;
    font-size: 0.85rem;
    font-weight: 500;
    color: white;
}

/* 프레임워크 및 라이브러리 */
.tech-tag.laravel {
    background-color: #f8c0bc;
    color: #6e1e19;
}

.tech-tag.vue {
    background-color: #bce6da;
    color: #1e5144;
}

.tech-tag.jquery {
    background-color: #b3d9f7;
    color: #24587d;
}

.tech-tag.bootstrap {
    background-color: #d5c9f2;
    color: #4b2d82;
}

/* 언어 */
.tech-tag.php {
    background-color: #d0d4eb;
    color: #4a4f75;
}

.tech-tag.javascript {
    background-color: #fdf4c8;
    color: #7a6b1b;
}

/* 데이터베이스 */
.tech-tag.mariadb,
.tech-tag.mysql {
    background-color: #c3dced;
    color: #2e5d7d;
}

.tech-tag.mongodb {
    background-color: #cce3c5;
    color: #3c6931;
}

/* 기타 */
.tech-tag.html {
    background-color: #f7c8b2;
    color: #923f1b;
}

.tech-tag.css {
    background-color: #c4ddf4;
    color: #245f8a;
}

.tech-tag.node {
    background-color: #b8e6c1;
    color: #276d33;
}

.tech-tag.react {
    background-color: #c4f0fa;
    color: #2a5e6c;
}

.tech-tag.express {
    background-color: #e0e0e0;
    color: #333;
}

.tech-tag.tailwind {
    background-color: #b8eae6;
    color: #2b6460;
}

/* 기본값 (일치하는 기술이 없을 경우) */
.tech-tag.default {
    background-color: #f1f3f5;
    color: #495057;
}


/* 필터 버튼 스타일 */
.filter-buttons {
    margin-bottom: 1.5rem;
}

.filter-buttons .btn {
    padding: 0.5rem 1.25rem;
    border-radius: 30px;
    font-weight: 500;
    transition: all 0.3s ease;
    margin: 0 0.25rem 0.5rem 0.25rem;
}

.filter-buttons .btn.active {
    background-color: #212529;
    color: white;
}

/* 필터링 애니메이션 개선 */
.project-wrapper {
    transition: opacity 0.3s ease, transform 0.3s ease;
    height: auto;
}

.project-wrapper.hidden {
    display: none;
}

.fade-transition {
    opacity: 0;
    transform: scale(0.95);
}

/* 프로젝트 그리드 */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    grid-auto-flow: dense;
}

@media (min-width: 768px) {
    .project-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 모달 관련 스타일 */
.modal-content {
    border: none;
    border-radius: 12px;
    overflow: hidden;
    background-color: var(--card-bg);
    color: var(--text-primary);
}

.modal-header {
    border-bottom: none;
    padding: 1rem 1.5rem;
    background-color: var(--navbar-bg);
    color: var(--navbar-text);
}

.modal-body {
    background-color: var(--card-bg);
}

.carousel-item img {
    max-height: 500px;
    object-fit: contain;
    background-color: var(--bg-secondary);
}

.carousel-indicators {
    margin-bottom: 0;
}

.carousel-indicators button {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #ccc;
    opacity: 0.5;
}

.carousel-indicators button.active {
    background-color: #212529;
    opacity: 1;
}

/* 썸네일 네비게이션 스타일 */
.thumbnail-navigation {
    padding: 10px;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--card-border);
    border-bottom: 1px solid var(--card-border);
}

.thumbnail-container {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding: 5px 0;
    scroll-behavior: smooth;
}

.thumbnail-item {
    width: 80px;
    height: 60px;
    flex-shrink: 0;
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: 6px;
    overflow: hidden;
    transition: all 0.2s ease;
}

.thumbnail-item.active {
    border-color: #0d6efd;
}

.thumbnail-item:hover {
    border-color: #adb5bd;
}

.thumbnail-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 크몽 아이콘 */
.icon-kmong {
    display: inline-block;
    width: 24px;
    height: 24px;
    vertical-align: middle;
    /*margin-top: 10px;*/
}

/* 다크모드 토글 버튼 */
.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 10px var(--card-shadow);
    z-index: 1000;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: scale(1.05);
}

#projects, #contact {
    padding-top: 80px; /* 네비게이션 바 높이보다 크게 설정 */
    margin-top: -20px; /* 약간의 음수 마진으로 위치 조정 */
}

/* home 섹션은 이미 충분한 패딩이 있으므로 다른 값 설정 */
#home {
    padding-top: 100px;
    margin-top: -30px;
}
.hover-group {
    transition: transform 0.2s ease;
}

.hover-group:hover {
    transform: scale(1.1);
}

.hover-group img, .hover-group span {
    transition: transform 0.2s ease;
}

.hover-group:hover img, .hover-group:hover span {
    transform: scale(1.1);
}