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

body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
    display: flex;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 좌측 사이드바 */
.sidebar {
    width: 280px;
    height: 100vh;
    background: linear-gradient(180deg, #1f2937 0%, #374151 100%);
    color: white;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.sidebar-header {
    padding: 2rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.profile-info {
    text-align: center;
}

.profile-avatar {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 2rem;
    color: #fbbf24;
    border: 3px solid rgba(255, 255, 255, 0.2);
    overflow: hidden;
}

.profile-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.profile-info h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: white;
}

.profile-info p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

.sidebar-menu {
    list-style: none;
    flex: 1;
    padding: 2rem 0;
}

.sidebar-menu li {
    margin-bottom: 0.5rem;
}

.sidebar-link {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.sidebar-link:hover,
.sidebar-link.active {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-left-color: #fbbf24;
}

.sidebar-link i {
    width: 20px;
    margin-right: 1rem;
    font-size: 1.1rem;
}

.sidebar-link span {
    font-weight: 500;
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.social-links-sidebar {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.social-link-sidebar {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link-sidebar:hover {
    background: #fbbf24;
    color: #1f2937;
    transform: translateY(-2px);
}

/* 모바일 토글 버튼 */
.mobile-toggle {
    display: none;
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1001;
    background: #1f2937;
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

/* 메인 콘텐츠 영역 */
.main-content {
    flex: 1;
    margin-left: 280px;
    min-height: 100vh;
}

/* 홈 섹션 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.highlight {
    color: #fbbf24;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn {
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary {
    background: #fbbf24;
    color: #333;
}

.btn-primary:hover {
    background: #f59e0b;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #333;
    transform: translateY(-2px);
}

/* 섹션 공통 스타일 */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #1f2937;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
}

/* 소개 섹션 */
.about {
    background: #f8fafc;
}

.about-content {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    align-items: flex-start;
    gap: 3rem;
    padding: 2rem 0;
}

.about-image {
    flex-shrink: 0;
}

.profile-photo {
    width: 250px;
    height: 250px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
    overflow: hidden;
}

.profile-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.profile-photo:hover {
    transform: scale(1.05);
}

.about-text {
    flex: 1;
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: #4b5563;
    line-height: 1.8;
}

.highlight-keyword {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 500;
    border: 1px solid rgba(102, 126, 234, 0.2);
    line-height: 1.2;
    display: inline-block;
    vertical-align: baseline;
}

.warning-keyword {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 500;
    border: 1px solid rgba(239, 68, 68, 0.2);
    line-height: 1.2;
    display: inline-block;
    vertical-align: baseline;
}

.warning-keyword-link {
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.3s ease;
    line-height: 1;
}

.warning-keyword-link:hover {
    transform: translateY(-1px);
}

.warning-keyword-link i {
    font-size: 0.8rem;
    color: #ef4444;
    opacity: 0.8;
    line-height: 1;
}

.warning-keyword-link:hover i {
    opacity: 1;
}

.link-keyword {
    color: #2563eb;
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid #2563eb;
    transition: color 0.3s ease;
}

.link-keyword:hover {
    color: #1d4ed8;
}

.skills h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.skill-tag {
    background: #2563eb;
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* 경험 섹션 */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #e5e7eb;
    transform: translateX(-50%);
}

.timeline-item {
    margin-bottom: 3rem;
    position: relative;
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: relative;
    width: calc(50% - 30px);
    margin-left: auto;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-left: 0;
    margin-right: auto;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 20px;
    width: 20px;
    height: 20px;
    background: #2563eb;
    border-radius: 50%;
    border: 4px solid white;
    box-shadow: 0 0 0 4px #e5e7eb;
}

.timeline-item:nth-child(odd) .timeline-content::before {
    right: -40px;
}

.timeline-item:nth-child(even) .timeline-content::before {
    left: -40px;
}

.timeline-header {
    margin-bottom: 1rem;
}

.timeline-header h3 {
    font-size: 1.3rem;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.company {
    color: #2563eb;
    font-weight: 500;
    margin-right: 1rem;
}

.period {
    color: #6b7280;
    font-size: 0.9rem;
}

.timeline-content ul {
    margin-top: 1rem;
    padding-left: 1.5rem;
}

.timeline-content li {
    margin-bottom: 0.5rem;
    color: #4b5563;
}

/* 프로젝트 섹션 */
.projects {
    background: #f8fafc;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.project-image {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
}

.project-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-content h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

.project-content p {
    color: #6b7280;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tech-tag {
    background: #e5e7eb;
    color: #374151;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
}

.project-details {
    margin: 1.5rem 0;
    border-top: 1px solid #e5e7eb;
    padding-top: 1.5rem;
    flex: 1;
}

.project-section {
    margin-bottom: 1.5rem;
}

.project-section:last-child {
    margin-bottom: 0;
}

.project-section h4 {
    font-size: 1rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.project-section h4 i {
    color: #2563eb;
    font-size: 0.9rem;
}

.project-section p {
    color: #6b7280;
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}

.project-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.project-section li {
    color: #6b7280;
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 0.3rem;
    padding-left: 1rem;
    position: relative;
}

.project-section li:before {
    content: '•';
    color: #2563eb;
    position: absolute;
    left: 0;
    font-weight: bold;
}

.project-section li:last-child {
    margin-bottom: 0;
}

.project-links {
    display: flex;
    gap: 1rem;
    border-top: 1px solid #e5e7eb;
    padding-top: 1rem;
    margin-top: auto;
}

.project-link {
    color: #2563eb;
    text-decoration: none;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.project-link:hover {
    color: #1d4ed8;
}

/* 자격증 섹션 */
.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.certificate-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    border-left: 4px solid #2563eb;
}

.certificate-card:hover {
    transform: translateY(-3px);
}

.certificate-icon {
    font-size: 2.5rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

.certificate-content h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: #1f2937;
}

.certificate-content p {
    color: #6b7280;
    margin-bottom: 1rem;
}

.certificate-date {
    color: #2563eb;
    font-weight: 500;
    font-size: 0.9rem;
}

/* 연락처 섹션 */
.contact {
    background: #f8fafc;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.contact-item i {
    font-size: 1.5rem;
    color: #2563eb;
    width: 40px;
    text-align: center;
}

.contact-item h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: #1f2937;
}

.contact-item p {
    color: #6b7280;
}

/* 푸터 */
.footer {
    background: #1f2937;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    body {
        flex-direction: column;
    }

    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        width: 100%;
        max-width: 300px;
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .mobile-toggle {
        display: flex;
    }

    .main-content {
        margin-left: 0;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-content {
        width: calc(100% - 50px);
        margin-left: 50px !important;
    }

    .timeline-content::before {
        left: -35px !important;
    }

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

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

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

    .contact-item {
        flex-direction: column;
        text-align: center;
    }

    .about-content {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
    }

    .profile-photo {
        width: 200px;
        height: 200px;
        font-size: 3rem;
        margin: 0 auto;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    .project-card {
        margin: 0 10px;
    }

    .sidebar {
        width: 100%;
    }
}

/* 스크롤 애니메이션 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 스크롤바 스타일 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #2563eb;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #1d4ed8;
}