:root {
    --primary-color: #1a1a1a;
    --accent-color: #4F46E5;
    --accent-hover: #4338CA;
    --secondary-color: #2D2D2D;
    --light-bg: #111111;
    --dark-text: #FFFFFF;
    --gray-text: #9CA3AF;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --card-border: 1px solid rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background: var(--light-bg);
    color: var(--dark-text);
    min-height: 100vh;
    line-height: 1.6;
}

.sidebar {
    width: 70px;
    height: auto;
    background: rgba(26, 26, 26, 0.95);
    padding: 1.5rem 0.8rem;
    position: fixed;
    left: 30px;
    top: 50%;
    transform: translateY(-50%);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    z-index: 1000;
    border: var(--card-border);
    box-shadow: var(--card-shadow);
}

.nav-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.8rem;
}

.nav-links a {
    color: var(--gray-text);
    text-decoration: none;
    font-size: 1.4rem;
    transition: all 0.3s ease;
    padding: 0.5rem;
    border-radius: 8px;
}

.nav-links a:hover {
    color: var(--accent-color);
    background: rgba(79, 70, 229, 0.1);
}

.nav-links a.active {
    color: var(--accent-color);
    background: rgba(79, 70, 229, 0.1);
}

.main-content {
    margin-left: 140px;
    padding: 2rem;
    width: calc(100% - 140px);
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 140px;
}

section {
    width: 100%;
    max-width: 900px;
    margin: 4rem auto;
    scroll-margin-top: 100px;
}

section h1 {
    font-size: 2rem;
    margin-bottom: 2rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--accent-color), #9333EA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

#namecard {
    background: rgba(26, 26, 26, 0.95);
    border-radius: 24px;
    padding: 3rem;
    margin-top: 30vh;
    margin-bottom: 40vh;
    position: relative;
    border: var(--card-border);
    box-shadow: var(--card-shadow);
    backdrop-filter: blur(10px);
    width: 100%;
    max-width: 600px;
}

.profile-card {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.name___img {
    width: 120px;
    height: 120px;
    border-radius: 20px;
    object-fit: cover;
    border: 3px solid var(--accent-color);
}

.profile-card___info {
    flex: 1;
}

.profile-card___info___name {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, var(--accent-color), #9333EA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.profile-card___info h4 {
    color: var(--gray-text);
    font-weight: 500;
    margin-bottom: 1rem;
}

.profile-card___info p {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 0.5rem;
    color: var(--gray-text);
}

.profile-card___info p i {
    color: var(--accent-color);
}

.profile-card___info p a {
    color: var(--gray-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

.profile-card___info p a:hover {
    color: var(--accent-color);
}

/* 프로필 링크 섹션 */
.profile-links {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 0.7rem;
}

.link-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    background: rgba(79, 70, 229, 0.1);
    border: 1px solid rgba(79, 70, 229, 0.2);
    border-radius: 8px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.link-item:hover {
    background: rgba(79, 70, 229, 0.2);
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(79, 70, 229, 0.2);
}

.link-item i {
    color: var(--accent-color);
    font-size: 0.95rem;
}

.link-item a {
    color: var(--gray-text);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: color 0.3s ease;
    white-space: nowrap;
}

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

/* 이력서/포트폴리오 강조 스타일 */
.link-item.link-primary {
    background: rgba(79, 70, 229, 0.15);
    border-color: rgba(79, 70, 229, 0.3);
    border-width: 1.5px;
}

.link-item.link-primary:hover {
    background: rgba(79, 70, 229, 0.25);
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.link-item.link-primary i {
    font-size: 1rem;
}

.link-item.link-primary a {
    font-weight: 600;
    font-size: 0.9rem;
}

.card {
    background: rgba(26, 26, 26, 0.95);
    padding: 2rem;
    border-radius: 16px;
    margin: 1.5rem 0;
    transition: all 0.3s ease;
    border: var(--card-border);
    box-shadow: var(--card-shadow);
    display: flex;
    gap: 2rem;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent-color);
    border-radius: 4px;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    background: rgba(45, 45, 45, 0.95);
}

.card i {
    font-size: 1.8rem;
    color: var(--accent-color);
    background: rgba(79, 70, 229, 0.1);
    padding: 1rem;
    border-radius: 12px;
    height: fit-content;
}

.card h3 {
    color: var(--dark-text);
    margin-bottom: 0.8rem;
    font-weight: 600;
    font-size: 1.2rem;
}

.card p {
    color: var(--gray-text);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.tech-stack {
    display: flex;
    gap: 0.8rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.tag {
    background: rgba(79, 70, 229, 0.1);
    color: var(--accent-color);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.timeline-item {
    position: relative;
    padding-left: 2.5rem;
    margin: 2rem 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 5px;
    width: 15px;
    height: 15px;
    background: var(--accent-color);
    border-radius: 50%;
    border: 3px solid var(--light-bg);
    box-shadow: 0 0 0 2px var(--accent-color);
}

.timeline-item::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 25px;
    bottom: -20px;
    width: 2px;
    background: var(--accent-color);
}

.skill-bar {
    width: 100%;
    background: #444;
    border-radius: 10px;
    height: 10px;
    margin-top: 0.8rem;
    position: relative;
}

.bar {
    height: 100%;
    border-radius: 10px;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
    position: relative;
}

.bar::after {
    content: '';
    position: absolute;
    right: -8px;
    top: -3px;
    width: 16px;
    height: 16px;
    background: var(--accent-color);
    border-radius: 50%;
    border: 3px solid var(--light-bg);
}

/* Career Cards */
#career .card {
    background: linear-gradient(145deg, rgba(16, 185, 129, 0.1), rgba(6, 182, 212, 0.1));
    border: 1px solid rgba(16, 185, 129, 0.3);
}

#career .card i {
    color: #10B981;
    background: rgba(16, 185, 129, 0.15);
}

#career .card::before {
    background: linear-gradient(to bottom, #10B981, #06B6D4);
}

#career .card:hover {
    border-color: #10B981;
    background: linear-gradient(145deg, rgba(16, 185, 129, 0.15), rgba(6, 182, 212, 0.15));
}

#career h1 {
    background: linear-gradient(to right, #10B981, #06B6D4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

#career .career-card {
    cursor: pointer;
    transition: all 0.3s ease;
}

#career .career-card:hover {
    transform: translateY(-5px) scale(1.02);
}

/* 모든 클릭 가능한 카드 스타일 */
.clickable-card {
    cursor: pointer;
    transition: all 0.3s ease;
}

.clickable-card:hover {
    transform: translateY(-5px);
}

/* 섹션별 모달 색상 */
#experiences .modal-content {
    border-color: rgba(79, 70, 229, 0.3);
}

#experiences .modal-content h2 {
    background: linear-gradient(to right, var(--accent-color), #9333EA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

#experiences .modal-content .close:hover {
    color: var(--accent-color);
}

#education .modal-content {
    border-color: rgba(79, 70, 229, 0.3);
}

#education .modal-content h2 {
    background: linear-gradient(to right, var(--accent-color), #9333EA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

#projects .modal-content {
    border-color: rgba(79, 70, 229, 0.3);
}

#projects .modal-content h2 {
    background: linear-gradient(to right, var(--accent-color), #9333EA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

#awards .modal-content {
    border-color: rgba(255, 215, 0, 0.3);
}

#awards .modal-content h2 {
    background: linear-gradient(to right, #FFD700, #FFA500);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

#awards .modal-content .close:hover {
    color: #FFD700;
}

#cves .modal-content {
    border-color: rgba(255, 59, 48, 0.3);
}

#cves .modal-content h2 {
    background: linear-gradient(to right, #FF3B30, #FF6B6B);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

#cves .modal-content .close:hover {
    color: #FF3B30;
}

#certificates .modal-content {
    border-color: rgba(79, 70, 229, 0.3);
}

#certificates .modal-content h2 {
    background: linear-gradient(to right, var(--accent-color), #9333EA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

#languages .modal-content {
    border-color: rgba(52, 199, 89, 0.3);
}

#languages .modal-content h2 {
    background: linear-gradient(to right, #34C759, #10B981);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

#languages .modal-content .close:hover {
    color: #34C759;
}

#presentations .modal-content {
    border-color: rgba(255, 149, 0, 0.3);
}

#presentations .modal-content h2 {
    background: linear-gradient(to right, #FF9500, #FF6B00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

#presentations .modal-content .close:hover {
    color: #FF9500;
}

/* 모달 스타일 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: linear-gradient(145deg, rgba(26, 26, 26, 0.98), rgba(45, 45, 45, 0.98));
    margin: auto;
    padding: 2.5rem;
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 20px;
    width: 90%;
    max-width: 700px;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.3s ease;
    backdrop-filter: blur(10px);
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-content h2 {
    color: #10B981;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    background: linear-gradient(to right, #10B981, #06B6D4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.modal-info {
    color: var(--gray-text);
}

.modal-info p {
    margin-bottom: 1rem;
    font-size: 1rem;
}

.modal-info strong {
    color: var(--dark-text);
    font-weight: 600;
}

.modal-details {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(16, 185, 129, 0.2);
}

.modal-details h3 {
    color: var(--dark-text);
    margin-bottom: 1rem;
    font-size: 1.2rem;
    font-weight: 600;
}

.modal-details ul {
    list-style: none;
    padding: 0;
}

.modal-details li {
    padding: 0.8rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--gray-text);
    line-height: 1.6;
}

.modal-details li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: #10B981;
    font-weight: bold;
}

.close {
    color: var(--gray-text);
    float: right;
    font-size: 2rem;
    font-weight: bold;
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1;
}

.close:hover,
.close:focus {
    color: #10B981;
    transform: scale(1.2);
}

/* 모달 스크롤바 스타일링 */
.modal-content::-webkit-scrollbar {
    width: 8px;
}

.modal-content::-webkit-scrollbar-track {
    background: rgba(26, 26, 26, 0.5);
    border-radius: 10px;
}

.modal-content::-webkit-scrollbar-thumb {
    background: rgba(16, 185, 129, 0.5);
    border-radius: 10px;
}

.modal-content::-webkit-scrollbar-thumb:hover {
    background: rgba(16, 185, 129, 0.8);
}

/* Experience Cards */
#experiences .card {
    border-left: none;
    padding-left: 3rem;
}

#experiences .card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background: linear-gradient(to bottom, var(--accent-color), #9333EA);
}

#experiences .card::after {
    content: '';
    position: absolute;
    left: -8px;
    top: 2rem;
    width: 20px;
    height: 20px;
    background: var(--accent-color);
    border-radius: 50%;
    border: 4px solid var(--light-bg);
}

/* Education Cards */
#education .card {
    background: linear-gradient(145deg, rgba(79, 70, 229, 0.1), rgba(147, 51, 234, 0.1));
    border: 1px solid rgba(79, 70, 229, 0.2);
}

#education .card i {
    background: rgba(79, 70, 229, 0.2);
}

/* Project Cards */
#projects .card {
    flex-direction: column;
    border: 1px solid rgba(79, 70, 229, 0.2);
    background: rgba(26, 26, 26, 0.95);
}

#projects .card:hover {
    border-color: var(--accent-color);
}

#projects .card i {
    margin-bottom: 1rem;
}

/* Awards Cards */
#awards .card {
    background: linear-gradient(145deg, rgba(26, 26, 26, 0.95), rgba(45, 45, 45, 0.95));
    border: none;
}

#awards .card i {
    color: #FFD700;
    background: rgba(255, 215, 0, 0.1);
}

#awards .card::before {
    background: #FFD700;
}

/* CVE Cards */
#cves .card {
    border: 1px solid rgba(255, 59, 48, 0.2);
    background: rgba(26, 26, 26, 0.95);
}

#cves .card i {
    color: #FF3B30;
    background: rgba(255, 59, 48, 0.1);
}

#cves .card::before {
    background: #FF3B30;
}

#cves .card:hover {
    border-color: #FF3B30;
}

/* Certificate Cards */
#certificates .card {
    background: linear-gradient(145deg, rgba(26, 26, 26, 0.95), rgba(45, 45, 45, 0.95));
    border: 1px solid rgba(79, 70, 229, 0.2);
}

#certificates .card i {
    background: rgba(79, 70, 229, 0.2);
    color: #4F46E5;
}

/* Language Cards */
#languages .card {
    background: linear-gradient(145deg, rgba(52, 199, 89, 0.1), rgba(79, 70, 229, 0.1));
    border: 1px solid rgba(52, 199, 89, 0.2);
}

#languages .card i {
    color: #34C759;
    background: rgba(52, 199, 89, 0.1);
}

/* Presentation Cards */
#presentations .card {
    background: linear-gradient(145deg, rgba(26, 26, 26, 0.95), rgba(45, 45, 45, 0.95));
    border: 1px solid rgba(255, 149, 0, 0.2);
}

#presentations .card i {
    color: #FF9500;
    background: rgba(255, 149, 0, 0.1);
}

#presentations .card:hover {
    border-color: #FF9500;
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: 60px;
        left: 0;
        bottom: 0;
        top: auto;
        transform: none;
        border-radius: 0;
        padding: 0.5rem;
    }

    .nav-links {
        flex-direction: row;
        justify-content: space-around;
        gap: 0.5rem;
    }

    .main-content {
        margin-left: 0;
        padding: 1rem;
        width: 100%;
        padding-bottom: 80px;
    }

    .profile-card {
        flex-direction: column;
        text-align: center;
    }

    #namecard {
        padding: 2rem;
        margin-top: 20vh;
    }

    .card {
        flex-direction: column;
        gap: 1rem;
        padding: 1.5rem;
    }

    .card i {
        font-size: 1.5rem;
        padding: 0.8rem;
    }

    #experiences .card {
        padding-left: 2rem;
    }

    #experiences .card::after {
        left: -6px;
        width: 16px;
        height: 16px;
    }

    #projects .card {
        text-align: center;
    }

    .profile-links {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.6rem;
    }

    .link-item {
        justify-content: flex-start;
        padding: 0.5rem 0.8rem;
    }

    .link-item a {
        font-size: 0.8rem;
    }
}