/* ==========================================
   NA.DERPNERD.COM - Minimal Clean Style
========================================== */

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

:root {
    /* Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-card: #ffffff;
    --text-primary: #1a202c;
    --text-secondary: #718096;
    --accent: #2d3748;
    --accent-hover: #1a202c;
    --border: #e2e8f0;
    --mint: #0891b2;
    --mint-hover: #0e7490;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Malgun Gothic', sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Container */
    --container-max: 1000px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Navigation */
nav {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-logo:hover {
    color: var(--mint);
    transform: translateY(-1px);
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--mint);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

/* Main Content */
main {
    min-height: calc(100vh - 200px);
    padding: var(--spacing-xl) 0;
}

/* Typography */
h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

h2 {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

h3 {
    font-size: 1.4rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.05rem;
}

/* Sections */
.section {
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 3px solid var(--border);
    color: var(--text-primary);
    position: relative;
    letter-spacing: -0.02em;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--gradient-1);
}

/* Lists */
ul, ol {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

li {
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
}

/* Links */
a {
    color: var(--mint);
    text-decoration: none;
}

a:hover {
    color: var(--mint-hover);
    text-decoration: underline;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    box-shadow: var(--shadow-md);
    letter-spacing: 0.01em;
}

.btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-mint {
    background: var(--gradient-1);
}

.btn-mint:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

.btn-outline {
    background: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
    box-shadow: none;
}

.btn-outline:hover {
    background: var(--accent);
    color: white;
    box-shadow: var(--shadow-md);
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 2rem;
    margin-bottom: var(--spacing-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
}

.card:hover {
    border-color: transparent;
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

/* Grid */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* Tags */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: var(--spacing-sm);
}

.tag {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    color: var(--text-secondary);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tag:hover {
    background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
    color: var(--text-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* Footer */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-xl);
    text-align: center;
}

footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Utilities */
.text-center { text-align: center; }
.text-muted { color: var(--text-secondary); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mt-lg { margin-top: var(--spacing-lg); }

/* Responsive */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    h1 {
        font-size: 2.25rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .nav-container {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1.5rem;
    }
    
    .grid-2 {
        grid-template-columns: 1fr;
    }
    
    .card {
        padding: 1.5rem;
    }
}

/* Print Styles */
@media print {
    nav, footer {
        display: none;
    }
    
    main {
        padding: 0;
    }
    
    .btn {
        display: none;
    }
}

/* Timeline Styles */
.timeline-section {
    margin: 4rem 0;
    padding: 2rem 0;
    background: linear-gradient(to bottom, transparent, var(--bg-secondary), transparent);
}

.timeline-container {
    position: relative;
    max-width: 100%;
    margin: 0 auto;
    padding: 2rem 0;
}

/* 가로 라인 */
.timeline-line {
    position: absolute;
    top: 50%;
    left: 5%;
    right: 5%;
    height: 2px;
    background: var(--border);
    transform: translateY(-50%);
}

/* 타임라인 아이템들 */
.timeline-items {
    display: flex;
    justify-content: space-around;
    align-items: center;
    position: relative;
    padding: 0 5%;
    max-width: 100%;
    margin-bottom: 3rem;
}

/* 타임라인 아이템 */
.timeline-item {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 0 0 auto;
}

/* 아이콘 점 (작게) */
.timeline-dot {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    z-index: 2;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    cursor: pointer;
}

.timeline-item:hover .timeline-dot {
    transform: scale(1.15);
    border-color: var(--mint);
}

.timeline-item.active .timeline-dot {
    transform: scale(1.25);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* 타입별 색상 */
.timeline-item[data-type="career"] .timeline-dot {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-color: #667eea;
    color: white;
}

.timeline-item[data-type="project"] .timeline-dot {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    border-color: #f093fb;
    color: white;
}

.timeline-item[data-type="education"] .timeline-dot {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    border-color: #4facfe;
    color: white;
}

/* 하단 고정 영역 */
.timeline-detail {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-height: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.timeline-detail.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.timeline-detail-date {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--mint);
    margin-bottom: 0.75rem;
    font-family: var(--font-mono);
}

.timeline-detail-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.timeline-detail-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.timeline-detail-empty {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding: 3rem 0;
}

/* 반응형 */
@media (max-width: 768px) {
    .timeline-items {
        padding: 0 3%;
        gap: 0.5rem;
    }
    
    .timeline-dot {
        width: 28px;
        height: 28px;
        font-size: 0.9rem;
    }
    
    .timeline-detail {
        padding: 1.5rem;
        min-height: 150px;
    }
    
    .timeline-detail-title {
        font-size: 1.25rem;
    }
    
    .timeline-line {
        left: 3%;
        right: 3%;
    }
}
/* ==========================================
   HOME V2 - Hero & Landing Styles
========================================== */

/* Hero Section */
.hero-section {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, 
        rgba(102, 126, 234, 0.05) 0%, 
        rgba(118, 75, 162, 0.05) 100%);
    padding: 4rem 0;
}

.hero-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.hero-greeting {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.hero-name {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.03em;
}

.hero-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
    margin-bottom: 3rem;
}

.hero-tag {
    padding: 0.5rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 500;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--mint);
    color: white;
    border-color: var(--mint);
}

.btn-primary:hover {
    background: var(--mint-hover);
    border-color: var(--mint-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(8, 145, 178, 0.2);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border);
}

.btn-secondary:hover {
    background: var(--bg-card);
    border-color: var(--mint);
    transform: translateY(-2px);
}

.icon {
    font-style: normal;
}

/* About Section */
.about-section {
    padding: 3rem 0;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    text-align: center;
}

.about-text strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Skills Section */
.skills-section {
    padding: 3rem 0;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 2rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.skill-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.skill-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.skill-description {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

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

/* Projects Preview Section */
.projects-preview-section {
    padding: 3rem 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.section-link {
    color: var(--mint);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

.section-link:hover {
    color: var(--mint-hover);
    transform: translateX(4px);
}

.projects-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.project-preview-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 2rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-preview-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.project-preview-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.project-preview-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.project-preview-description {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.project-preview-meta {
    font-size: 0.85rem;
    color: var(--mint);
    font-weight: 600;
    font-family: var(--font-mono);
}

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

.contact-cta {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, 
        rgba(102, 126, 234, 0.05) 0%, 
        rgba(118, 75, 162, 0.05) 100%);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.contact-cta h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.contact-cta p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.contact-cta-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-name {
        font-size: 2.5rem;
    }
    
    .hero-title {
        font-size: 1.25rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .skills-grid,
    .projects-preview-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
}
/* ==========================================
   RESUME V2 - Timeline & Resume Styles
========================================== */

.resume-container {
    max-width: 900px;
    margin: 0 auto;
}

/* Resume Header */
.resume-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border);
}

.resume-header h1 {
    font-size: 2.5rem;
    margin: 0;
}

.resume-actions {
    display: flex;
    gap: 1rem;
}

/* Resume Sections */
.resume-section {
    margin-bottom: 3rem;
}

.resume-section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border);
    position: relative;
}

.resume-section-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background: var(--mint);
}

/* Info Grid */
.resume-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.resume-info-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.resume-info-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.resume-info-value {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
}

.resume-info-value a {
    color: var(--mint);
    text-decoration: none;
}

.resume-info-value a:hover {
    text-decoration: underline;
}

/* Vertical Timeline */
.timeline-vertical {
    position: relative;
    padding-left: 3rem;
}

.timeline-vertical::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.timeline-item-v {
    position: relative;
    margin-bottom: 3rem;
    padding-left: 2rem;
}

.timeline-item-v:last-child {
    margin-bottom: 0;
}

.timeline-dot-v {
    position: absolute;
    left: -2.85rem;
    top: 0.25rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 3px solid var(--bg-primary);
    z-index: 2;
}

.timeline-dot-v.career {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.timeline-dot-v.project {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.timeline-dot-v.education {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.timeline-content-v {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.timeline-content-v:hover {
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.timeline-date-v {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--mint);
    margin-bottom: 0.5rem;
    font-family: var(--font-mono);
}

.timeline-title-v {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.timeline-role-v {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.timeline-description-v {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Tech Stack */
.tech-category {
    margin-bottom: 2rem;
}

.tech-category:last-child {
    margin-bottom: 0;
}

.tech-category-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.tech-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-item {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    color: var(--text-primary);
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tech-item:hover {
    background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* Education */
.education-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
}

.education-school {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.education-major {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.education-period {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

/* Certificates */
.certificate-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.certificate-item {
    padding: 1rem 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.certificate-item:hover {
    box-shadow: var(--shadow-sm);
    border-color: var(--mint);
}

/* Responsive */
@media (max-width: 768px) {
    .resume-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.5rem;
    }
    
    .resume-actions {
        width: 100%;
        flex-direction: column;
    }
    
    .resume-actions .btn {
        width: 100%;
        justify-content: center;
    }
    
    .timeline-vertical {
        padding-left: 2rem;
    }
    
    .timeline-item-v {
        padding-left: 1.5rem;
    }
}

/* Print Styles */
@media print {
    .resume-actions {
        display: none;
    }
    
    .timeline-content-v {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}
/* ==========================================
   UNIFIED PAGE STYLES
========================================== */

/* Page Header (공통) */
.page-header {
    background: linear-gradient(135deg, 
        rgba(102, 126, 234, 0.05) 0%, 
        rgba(118, 75, 162, 0.05) 100%);
    border-bottom: 1px solid var(--border);
    padding: 3rem 0;
    margin-bottom: 3rem;
}

.page-header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin: 0;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.page-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin: 0;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.page-actions {
    display: flex;
    gap: 1rem;
}

.page-content {
    padding: 0 0 4rem 0;
}

/* ==========================================
   PROJECT CARD STYLES
========================================== */

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    margin-bottom: 2rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: transparent;
    transform: translateY(-2px);
}

.project-header {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.project-icon {
    font-size: 3rem;
    flex-shrink: 0;
}

.project-meta {
    flex: 1;
}

.project-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.5rem 0;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.project-period {
    font-size: 0.9rem;
    color: var(--mint);
    font-weight: 600;
    font-family: var(--font-mono);
}

.project-summary {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.project-section {
    margin-bottom: 2rem;
}

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

.project-section-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

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

.project-list li {
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    position: relative;
    line-height: 1.6;
    color: var(--text-secondary);
}

.project-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--mint);
    font-weight: 600;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

/* ==========================================
   EXPERIENCE CARD STYLES
========================================== */

.experience-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    margin-bottom: 2rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.experience-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: transparent;
    transform: translateY(-2px);
}

.experience-header {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border);
}

.experience-company {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.company-icon {
    font-size: 3rem;
    flex-shrink: 0;
}

.company-name {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0 0 0.5rem 0;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.company-role {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.company-period {
    font-size: 0.9rem;
    color: var(--mint);
    font-weight: 600;
    font-family: var(--font-mono);
}

.experience-section {
    margin-bottom: 2rem;
}

.experience-section:last-of-type {
    margin-bottom: 1.5rem;
}

.experience-section-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.experience-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.experience-list li {
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    position: relative;
    line-height: 1.6;
    color: var(--text-secondary);
}

.experience-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--mint);
    font-weight: 600;
}

.experience-list.highlight li {
    background: linear-gradient(135deg, 
        rgba(102, 126, 234, 0.03) 0%, 
        rgba(118, 75, 162, 0.03) 100%);
    padding: 0.5rem 0.5rem 0.5rem 1.5rem;
    border-radius: 4px;
    margin-bottom: 0.75rem;
}

.experience-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

/* ==========================================
   RESUME SPECIFIC STYLES
========================================== */

.resume-section {
    margin-bottom: 3rem;
}

.resume-section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border);
    position: relative;
}

.resume-section-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background: var(--mint);
}

/* ==========================================
   RESPONSIVE
========================================== */

@media (max-width: 768px) {
    .page-header {
        padding: 2rem 0;
    }
    
    .page-header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.5rem;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .page-actions {
        width: 100%;
        flex-direction: column;
    }
    
    .page-actions .btn {
        width: 100%;
        justify-content: center;
    }
    
    .project-card,
    .experience-card {
        padding: 1.5rem;
    }
    
    .project-header,
    .experience-company {
        flex-direction: column;
        gap: 1rem;
    }
    
    .project-icon,
    .company-icon {
        font-size: 2.5rem;
    }
}

/* ==========================================
   TIMELINE ACCORDION STYLES
========================================== */

.timeline-content-v {
    cursor: pointer;
    position: relative;
}

.timeline-header-v {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    width: 100%;
    gap: 1rem;
}

.timeline-main-info {
    flex: 1;
}

.timeline-toggle {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.1), rgba(8, 145, 178, 0.2));
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.timeline-header-v:hover .timeline-toggle {
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.2), rgba(8, 145, 178, 0.3));
    transform: scale(1.1);
}

.toggle-icon {
    font-size: 0.75rem;
    color: var(--mint);
    font-weight: 600;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.timeline-detail-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    padding-top: 0;
}

.timeline-content-v.expanded .timeline-detail-content {
    padding-top: 1rem;
}

.timeline-content-v.collapsed .timeline-description-v {
    margin-bottom: 0;
}

.timeline-content-v.expanded .timeline-description-v {
    margin-bottom: 0;
}

/* 호버 효과 강화 */
.timeline-content-v:hover {
    border-color: var(--mint);
}

.timeline-content-v.expanded {
    border-color: var(--mint);
}

.timeline-content-v.expanded:hover {
    box-shadow: var(--shadow-lg);
}

/* ==========================================
   PROJECT METADATA STYLES
========================================== */

.project-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.project-info {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.project-info .project-period {
    color: var(--mint);
    font-weight: 600;
    font-family: var(--font-mono);
}

.project-divider {
    color: var(--border);
}

@media (max-width: 768px) {
    .project-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
    
    .project-divider {
        display: none;
    }
}