/* CSS variables & Reset */
:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent-indigo: #6366f1;
    --accent-indigo-hover: #4f46e5;
    --accent-teal: #14b8a6;
    --accent-teal-hover: #0d9488;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --card-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.05);
    
    --font-sans: 'Inter', 'Noto Sans KR', sans-serif;
    --font-mono: 'Fira Code', monospace;
    
    --print-page-width: 210mm;
    --print-page-height: 297mm;
}

.light-theme {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e2e8f0;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    
    --accent-indigo: #4f46e5;
    --accent-indigo-hover: #3730a3;
    --accent-teal: #0d9488;
    --accent-teal-hover: #0f766e;
    
    --border-color: rgba(0, 0, 0, 0.08);
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(0, 0, 0, 0.05);
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

/* Floating Controls (Screen Only) */
.screen-controls {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    gap: 10px;
}

.control-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 10px 16px;
    border-radius: 30px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.control-btn:hover {
    transform: translateY(-2px);
    background-color: var(--bg-tertiary);
}

.primary-btn {
    background-color: var(--accent-indigo);
    color: #ffffff;
    border: none;
}

.primary-btn:hover {
    background-color: var(--accent-indigo-hover);
}

/* Show/Hide Theme Icons */
.sun-icon { display: none; }
.moon-icon { display: block; }
.light-theme .sun-icon { display: block; }
.light-theme .moon-icon { display: none; }

/* Main Container Layout */
.portfolio-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 40px;
    display: flex;
    flex-direction: column;
    gap: 80px;
    position: relative;
}

/* Decor circles for screen aesthetics */
.decor-circle {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
    z-index: -1;
}

.circle-1 {
    width: 300px;
    height: 300px;
    background-color: var(--accent-indigo);
    top: 50px;
    left: -100px;
}

.circle-2 {
    width: 250px;
    height: 250px;
    background-color: var(--accent-teal);
    top: 400px;
    right: -100px;
}

/* Profile Section Styles */
.profile-header {
    margin-bottom: 40px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.profile-name {
    font-size: 2.8rem;
    font-weight: 900;
    letter-spacing: -0.03em;
    display: flex;
    align-items: baseline;
    gap: 12px;
}

.profile-name-en {
    font-size: 1.3rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.profile-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--accent-indigo);
    margin-top: -10px;
}

.profile-lead {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 720px;
    margin-top: 10px;
}

.profile-contact {
    display: flex;
    flex-wrap: wrap;
    gap: 16px 24px;
    padding: 20px;
    background-color: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    margin-top: 10px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.contact-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.contact-item a:hover {
    color: var(--accent-indigo);
    text-decoration: underline;
}

/* Sections Common Subtitle */
.section-subtitle {
    font-size: 1.1rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.subtitle-kr {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
}

/* Overview Section */
.overview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 40px;
}

.overview-card {
    background-color: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    cursor: pointer;
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    position: relative;
    overflow: hidden;
}

.overview-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.overview-card[data-target="project-yacht"]:hover {
    border-color: rgba(99, 102, 241, 0.4);
}

.overview-card[data-target="project-saloris"]:hover {
    border-color: rgba(20, 184, 166, 0.4);
}

.card-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 20px;
}

.bg-indigo {
    background-color: rgba(99, 102, 241, 0.15);
    color: var(--accent-indigo);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.bg-teal {
    background-color: rgba(20, 184, 166, 0.15);
    color: var(--accent-teal);
    border: 1px solid rgba(20, 184, 166, 0.3);
}

.card-icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background-color: rgba(255, 255, 255, 0.03);
    margin-bottom: 4px;
}

.project-icon-small {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
}

.card-period {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: -6px;
}

.card-summary {
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex-grow: 1;
}

.card-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.highlight-tag {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 4px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.card-techs {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 8px;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
}

.view-details-hint {
    font-size: 0.8rem;
    font-weight: 600;
    align-self: flex-end;
    margin-top: 4px;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.overview-card:hover .view-details-hint {
    opacity: 1;
}

/* Skills Summary Section */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 20px;
}

.skill-category {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 20px;
}

.skill-category h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--accent-indigo);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 6px;
}

.skill-category p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Project Detail Section */
.section-project {
    display: flex;
    flex-direction: column;
    gap: 28px;
    padding: 20px 0;
}

.project-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 20px;
}

.project-header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.project-logo {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.project-detail-header h2 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-primary);
}

.project-tagline {
    font-size: 1rem;
    color: var(--text-secondary);
}

.project-metadata {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 4px;
    text-align: right;
}

.project-metadata strong {
    color: var(--text-primary);
}

/* Tech box */
.tech-box {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 16px 20px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.tech-box strong {
    font-size: 0.85rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-tags span {
    font-size: 0.8rem;
    padding: 4px 10px;
    border-radius: 6px;
    font-weight: 500;
}

.tag-frontend {
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--accent-indigo);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.tag-backend {
    background-color: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.tag-infra {
    background-color: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.tag-ai {
    background-color: rgba(20, 184, 166, 0.1);
    color: var(--accent-teal);
    border: 1px solid rgba(20, 184, 166, 0.2);
}

.tag-cv {
    background-color: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

/* Detail Grid Layout */
.detail-grid {
    display: grid;
    grid-template-columns: 1.1fr 1.2fr;
    gap: 32px;
    align-items: start;
}

.detail-subtitle {
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 16px;
    display: flex;
    align-items: baseline;
    gap: 8px;
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 6px;
}

/* Screenshots / Gallery */
.gallery-wrapper {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background-color: #000000;
    aspect-ratio: 16 / 10;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
}

.carousel-track {
    display: flex;
    height: 100%;
    width: 100%;
}

.carousel-slide {
    flex-shrink: 0;
    width: 100%;
    height: 100%;
    position: relative;
    display: none;
    align-items: center;
    justify-content: center;
    background-color: #0a0f1d;
    cursor: zoom-in;
}

.carousel-slide.active {
    display: flex;
}

.carousel-slide img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.slide-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.85));
    color: #ffffff;
    padding: 16px 12px 10px 12px;
    font-size: 0.8rem;
    text-align: center;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(0, 0, 0, 0.5);
    border: none;
    color: #ffffff;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease;
}

.carousel-btn:hover {
    background-color: rgba(0, 0, 0, 0.8);
}

.prev-btn { left: 10px; }
.next-btn { right: 10px; }

.carousel-indicators {
    position: absolute;
    bottom: 35px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 6px;
    z-index: 10;
}

.indicator {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.indicator.active {
    background-color: #ffffff;
    transform: scale(1.3);
}

/* Bullet list for implementations */
.bullet-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.bullet-list li {
    position: relative;
    padding-left: 16px;
}

.bullet-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--accent-indigo);
}

#project-saloris .bullet-list li::before {
    background-color: var(--accent-teal);
}

.bullet-list strong {
    font-size: 0.95rem;
    color: var(--text-primary);
    display: block;
    margin-bottom: 2px;
}

.bullet-list p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Project Architecture Timeline */
.timeline-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 10px;
    position: relative;
}

.timeline-container::before {
    content: "";
    position: absolute;
    top: 20px;
    left: 10%;
    right: 10%;
    height: 2px;
    background-color: var(--border-color);
    z-index: 1;
}

.timeline-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
    position: relative;
    z-index: 2;
}

.timeline-badge {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--card-shadow);
}

.timeline-item:hover .timeline-badge {
    border-color: var(--accent-indigo);
    color: var(--accent-indigo);
}

.timeline-content h4 {
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.timeline-content p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.text-indigo-highlight .timeline-badge {
    border-color: var(--accent-indigo);
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--accent-indigo);
}

.text-indigo-highlight h4 {
    color: var(--accent-indigo);
}

/* Troubleshooting Section */
.ts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.ts-card {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ts-status {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: #ef4444;
    letter-spacing: 0.1em;
}

.ts-title {
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.4;
}

.ts-body {
    font-size: 0.8rem;
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: var(--text-secondary);
}

.ts-body strong {
    color: var(--text-primary);
    display: block;
    margin-top: 4px;
}

/* Saloris Outcomes Grid */
.outcomes-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.outcome-card {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 24px;
    position: relative;
    overflow: hidden;
}

.outcome-num {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 3.5rem;
    font-weight: 900;
    font-family: var(--font-mono);
    color: var(--text-muted);
    opacity: 0.08;
    line-height: 1;
}

.outcome-card h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
    position: relative;
    z-index: 2;
}

.outcome-card p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
    position: relative;
    z-index: 2;
}

/* Accomplishments & Takeaways Box */
.accomplishments-box {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(20, 184, 166, 0.05) 100%);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 24px;
}

.accomplishments-box h4 {
    font-size: 1rem;
    font-weight: 800;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.accomplishments-box p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Interactive Image Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(10, 15, 30, 0.95);
    backdrop-filter: blur(8px);
    align-items: center;
    justify-content: center;
}

.close-modal-btn {
    position: absolute;
    top: 20px;
    right: 30px;
    color: #ffffff;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.2s ease;
    z-index: 2010;
}

.close-modal-btn:hover {
    color: var(--accent-indigo);
}

.modal-content-wrapper {
    position: relative;
    max-width: 85%;
    max-height: 85%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.modal-content {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-caption {
    color: #f8fafc;
    font-size: 0.95rem;
    text-align: center;
    font-weight: 500;
}

/* Footer elements */
.portfolio-footer {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    margin-top: 20px;
}

.portfolio-footer a {
    color: var(--accent-indigo);
    text-decoration: none;
}

.portfolio-footer a:hover {
    text-decoration: underline;
}

/* Print Only and Screen Only Helpers */
.print-only { display: none; }
.no-print { display: block; }

/* Responsive adjustments for Screen view */
@media (max-width: 768px) {
    .portfolio-container {
        padding: 40px 20px;
        gap: 60px;
    }
    
    .profile-name {
        font-size: 2.2rem;
        flex-direction: column;
        gap: 4px;
    }
    
    .overview-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .detail-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .timeline-container {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .timeline-container::before {
        display: none;
    }
    
    .timeline-item {
        flex-direction: row;
        text-align: left;
        align-items: flex-start;
    }
    
    .timeline-badge {
        flex-shrink: 0;
    }
    
    .ts-grid {
        grid-template-columns: 1fr;
    }
    
    .outcomes-grid {
        grid-template-columns: 1fr;
    }
    
    .project-detail-header {
        flex-direction: column;
        text-align: left;
    }
    
    .project-metadata {
        text-align: left;
    }
    
    .tech-box {
        flex-direction: column;
        align-items: flex-start;
    }
}