/* Portfolio Frontend Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #ffffff;
    --bg-light: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --border: #e2e8f0;
    --text: #0f172a;
    --text-muted: #64748b;
    --accent: #0ea5e9;
    --accent-hover: #0284c7;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    color: var(--accent-hover);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
}

.header .container {
    height: 60px;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text) !important;
}

.logo:hover {
    color: var(--accent) !important;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-muted);
    font-weight: 500;
}

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

/* Main */
.main-content {
    padding-top: 60px;
}

/* Hero - IT/기술 콘셉트 */
.hero {
    position: relative;
    min-height: 240px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #030712 0%, #0f172a 25%, #0c4a6e 50%, #1e3a5f 75%, #0a1628 100%);
    background-size: 400% 400%;
    animation: heroGradient 14s ease infinite;
}

.hero-background::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 245, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 245, 255, 0.03) 1px, transparent 1px);
    background-size: 32px 32px;
    pointer-events: none;
}

@keyframes heroGradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.hero-title {
    position: relative;
    z-index: 1;
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: #ffffff;
    text-shadow: 0 0 40px rgba(0, 245, 255, 0.4);
}

/* Projects Section */
.projects-section {
    padding: 3rem 0 4rem;
    background: var(--bg-light);
}

.category-filter {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.category-group {
    position: relative;
}

.category-children {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: -0.125rem;
    min-width: 100%;
    padding: 0.5rem 0.25rem 0.25rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity 0.2s, visibility 0.2s, transform 0.2s;
    z-index: 10;
}

.category-group:hover .category-children {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.category-children .filter-btn {
    display: block;
    width: 100%;
    text-align: left;
    margin-bottom: 0.125rem;
}

.category-children .filter-btn:last-child {
    margin-bottom: 0;
}

.filter-btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-muted);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.filter-btn:hover {
    background: var(--bg-card-hover);
    color: var(--text);
}

.filter-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.filter-btn-child {
    padding-left: 1rem;
}

/* Projects Grid - 목록만 그리드, 상세 페이지와 분리 */
.projects-section .projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: minmax(200px, auto);
    grid-auto-flow: row;
    gap: 1.5rem;
}

.projects-section .projects-grid > .project-card-wrapper {
    min-width: 0;
    max-width: 100%;
    grid-column: span 1;
}

.projects-section .projects-grid .project-card {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

@media (min-width: 640px) {
    .projects-section .projects-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 960px) {
    .projects-section .projects-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.project-card-wrapper {
    display: block;
}

.project-card-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.project-card-link:hover {
    color: inherit;
}

.project-card-link:hover .project-title {
    color: var(--accent);
}

.project-card-wrapper:hover .project-card {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.project-card {
    display: block;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.2s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    opacity: 1;
    min-height: 200px;
}

.project-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.project-image {
    aspect-ratio: 5/3;
    min-height: 120px;
    background: var(--bg-light);
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-image.placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-content {
    text-align: center;
    color: var(--text-muted);
}

.placeholder-icon {
    font-size: 3rem;
    opacity: 0.5;
}

.project-info {
    padding: 1.25rem;
}

.project-category {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.project-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.project-description {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin: 0 1.25rem 1rem;
    padding: 0;
}

.tech-tag {
    font-size: 0.75rem;
    padding: 0.2rem 0.5rem;
    background: var(--bg-light);
    border-radius: 4px;
    color: var(--text-muted);
}

.project-links {
    display: flex;
    gap: 0.75rem;
    padding: 0 1.25rem 1.25rem;
}

.project-link {
    font-size: 0.85rem;
}

.no-projects {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

/* Project Detail - 메인 이미지 영역 (1000×600 전체 노출 + 우측 썸네일) */
.project-detail-visual {
    width: 100%;
    background: var(--bg-light);
    padding: 1.5rem 0;
}

.container--visual {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.project-detail-image-area {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 1024px) {
    .project-detail-image-area {
        flex-direction: row;
        align-items: flex-start;
        gap: 1.25rem;
    }
}

/* 메인 이미지: 1000×600 원본 크기로 표시 */
.project-detail-main-image {
    margin: 0;
    flex-shrink: 0;
    width: 1000px;
    max-width: 100%;
    aspect-ratio: 1000/600;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.project-detail-main-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

@media (max-width: 1023px) {
    .project-detail-main-image {
        width: 100%;
        max-width: 100%;
        height: auto;
        aspect-ratio: 1000/600;
        min-height: 200px;
    }
    .project-detail-main-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
}

/* 우측 썸네일 목록 */
.project-detail-thumbs {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.5rem;
    min-width: 0;
}

@media (min-width: 1024px) {
    .project-detail-thumbs {
        flex-direction: column;
        flex: 1;
        max-width: 180px;
        max-height: 600px;
        overflow-y: auto;
    }
}

.project-detail-thumb {
    padding: 0;
    margin: 0;
    border: 2px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg);
    cursor: pointer;
    flex-shrink: 0;
    width: 72px;
    height: 72px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.project-detail-thumb:hover {
    border-color: var(--accent);
}

.project-detail-thumb.is-active {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent);
}

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

@media (min-width: 1024px) {
    .project-detail-thumb {
        width: 100%;
        max-width: 160px;
        height: 100px;
    }
}

.project-detail-banner-placeholder {
    margin: 0;
    max-width: 1000px;
    aspect-ratio: 16/6;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--border) 100%);
    color: var(--text-muted);
    border-radius: 10px;
}

.project-detail-banner-placeholder .placeholder-icon {
    font-size: 3rem;
    opacity: 0.5;
}

.project-detail-banner-placeholder .placeholder-text {
    font-size: 1rem;
    font-weight: 500;
}

.project-detail-section {
    padding: 2rem 0 4rem;
    background: var(--bg);
}

.container--detail {
    max-width: 1200px;
}

.breadcrumb {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.breadcrumb a {
    color: var(--accent);
}

.breadcrumb a:hover {
    color: var(--accent-hover);
}

.breadcrumb-sep {
    margin: 0 0.4rem;
    opacity: 0.6;
}

.project-detail-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1.3;
    margin: 0 0 0.5rem;
}

.project-detail-short {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin: 0 0 1.5rem;
}

@media (min-width: 768px) {
    .project-detail-title {
        font-size: 1.75rem;
    }
    .project-detail-short {
        font-size: 1.05rem;
    }
}

.project-detail-notice {
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin-bottom: 2rem;
    font-size: 0.9rem;
}

.project-detail-notice strong {
    display: block;
    margin-bottom: 0.35rem;
    color: var(--text);
}

.project-detail-notice p {
    margin: 0;
    color: var(--text-muted);
}

.project-detail-layout {
    display: grid;
    gap: 2rem;
}

@media (min-width: 900px) {
    .project-detail-layout {
        grid-template-columns: 1fr 320px;
        align-items: start;
    }
}

.project-detail-left {
    min-width: 0;
}

.detail-subtitle {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.project-detail-gallery {
    margin-bottom: 2rem;
}

.detail-gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.75rem;
}

.detail-gallery-item {
    margin: 0;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.detail-gallery-item img {
    width: 100%;
    height: auto;
    aspect-ratio: 16/10;
    object-fit: cover;
    display: block;
}

.project-detail-info-block {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 2px 12px rgba(0,0,0,0.04);
}

.detail-row {
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: 1rem;
    align-items: baseline;
    margin-top: 1rem;
}

.detail-row:first-of-type {
    margin-top: 0;
}

@media (max-width: 480px) {
    .detail-row {
        grid-template-columns: 1fr;
        gap: 0.35rem;
    }
}

.detail-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.detail-value {
    margin: 0;
    font-size: 0.95rem;
}

.detail-value code {
    padding: 0.2rem 0.5rem;
    background: var(--bg-light);
    border-radius: 4px;
    font-size: 0.875rem;
}

.detail-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    word-break: break-all;
}

.detail-link .link-icon {
    font-size: 0.75rem;
    opacity: 0.7;
}

.detail-content {
    font-size: 1rem;
    line-height: 1.85;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.detail-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.detail-keywords .keyword-tag {
    padding: 0.35rem 0.75rem;
    background: var(--bg-light);
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* 우측 옵션 카드 (카페24 옵션A/B 스타일) */
.project-detail-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 900px) {
    .project-detail-sidebar {
        position: sticky;
        top: 5rem;
    }
}

.detail-option-cards {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.detail-option-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.25rem;
    box-shadow: 0 2px 12px rgba(0,0,0,0.04);
}

.project-detail-sidebar .btn {
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.project-detail-sidebar .btn-primary {
    background: var(--accent);
    color: #fff;
    border: none;
}

.project-detail-sidebar .btn-primary:hover {
    background: var(--accent-hover);
}

.detail-option-card--cta .btn-primary {
    background: var(--accent);
    color: #fff;
}

.detail-option-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.35rem;
}

.detail-option-desc {
    font-size: 0.9rem;
    color: var(--text);
    margin: 0 0 1rem;
    line-height: 1.4;
}

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
    padding: 0.65rem 1rem;
}

.project-detail-sidebar .btn-list {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: var(--bg-light);
    border: 1px solid var(--border);
    color: var(--text-muted);
}

.project-detail-sidebar .btn-list:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.project-detail-sidebar .btn-list-icon {
    font-size: 1rem;
}

.project-detail-sidebar .btn-outline {
    border: 1px solid var(--border);
    color: var(--text);
}

.project-detail-sidebar .btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.project-detail-sidebar .btn-cta-inquiry:hover {
    background: var(--accent-hover);
}

/* 동일 카테고리 프로젝트 - 목록 페이지와 동일 카드 디자인 */
.project-detail-related {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.project-detail-related .projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: minmax(200px, auto);
    gap: 1.5rem;
}

.project-detail-related .projects-grid > .project-card-wrapper {
    min-width: 0;
    max-width: 100%;
    grid-column: span 1;
}

.project-detail-related .projects-grid .project-card {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

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

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

/* Contact Section */
.contact-section {
    padding: 3rem 0 4rem;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 2rem;
}

.contact-info h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.contact-list {
    list-style: none;
}

.contact-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
}

.contact-list li:last-child {
    border-bottom: none;
}

.contact-list strong {
    display: inline-block;
    width: 80px;
    color: var(--text-muted);
}

/* Footer */
.footer {
    padding: 1rem 0;
    border-top: 1px solid var(--border);
    margin-top: 0;
}

.footer p {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}