:root {
    --bg-primary: #f5f5f5;
    --bg-secondary: #eaeaea;
    --bg-card: #ffffff;
    --bg-dark: #2d2d2d;
    --bg-terminal: #1e1e1e;
    --text-primary: #1a1a1a;
    --text-secondary: #555555;
    --text-muted: #888888;
    --text-light: #f0f0f0;
    --accent: #4a6fa5;
    --accent-light: #6b8fc5;
    --accent-subtle: #e8eef5;
    --border: #d5d5d5;
    --border-light: #e8e8e8;
    --green: #5cb85c;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.1);
    --radius: 8px;
    --radius-lg: 12px;
    --font-mono: 'JetBrains Mono', monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    height: 100%;
    width: 100%;
}

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

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
}

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

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

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(245, 245, 245, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    transition: box-shadow 0.3s;
}

.nav.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 28px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    transition: color 0.2s;
    letter-spacing: 0.01em;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: 0.3s;
}

.hero {
    padding: 100px 24px 32px;
    max-width: 1120px;
    margin: 0 auto;
}

.terminal-bar {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    padding: 12px 20px;
    background: var(--bg-terminal);
    border-radius: var(--radius);
    display: inline-flex;
    gap: 8px;
    max-width: 100%;
    overflow: hidden;
}

.terminal-prompt {
    color: var(--accent-light);
    flex-shrink: 0;
}

.terminal-cmd {
    color: var(--text-light);
    overflow: hidden;
    white-space: nowrap;
    border-right: 2px solid var(--accent-light);
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% { border-color: transparent; }
}

.hero-content {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 40px;
    align-items: start;
}

.hero-photo {
    width: 200px;
    height: 260px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    flex-shrink: 0;
}

.hero-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 20%;
}

.hero-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--accent);
    margin-bottom: 16px;
    text-transform: uppercase;
}

.hero h1 {
    font-size: 2.6rem;
    font-weight: 700;
    line-height: 1.15;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.hero-sub {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
    max-width: 600px;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 32px;
}

.tag {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 500;
    background: var(--accent-subtle);
    color: var(--accent);
    border: 1px solid rgba(74, 111, 165, 0.15);
}

.hero-cta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--accent);
    border: 1.5px solid var(--accent);
}

.btn-outline:hover {
    background: var(--accent-subtle);
    transform: translateY(-1px);
}

.hero-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-md);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--green);
    letter-spacing: 0.08em;
    margin-bottom: 4px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--green);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.card-id {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.card-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.card-role {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.card-stats {
    display: flex;
    gap: 24px;
    margin-bottom: 20px;
    padding: 16px 0;
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.stat {
    text-align: center;
}

.stat-num {
    display: block;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.1em;
}

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

.mini-tag {
    padding: 4px 10px;
    border-radius: 14px;
    font-size: 0.7rem;
    font-weight: 500;
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.section {
    padding: 32px 0;
}

.section:nth-child(even) {
    background: var(--bg-secondary);
}

.section-header {
    margin-bottom: 24px;
}

.section-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--accent);
    margin-bottom: 12px;
    text-transform: uppercase;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.section-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 100%;
    line-height: 1.7;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.about-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.about-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-subtle);
    border-radius: 10px;
    margin-bottom: 16px;
}

.about-icon svg {
    width: 22px;
    height: 22px;
    color: var(--accent);
}

.about-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.about-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

.match-grid {
    display: grid;
    gap: 16px;
}

.match-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 24px 28px;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
    overflow: hidden;
}

.match-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--accent);
    opacity: 0;
    transition: opacity 0.2s;
}

.match-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.match-card:hover::before {
    opacity: 1;
}

.match-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.match-num {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent);
    background: rgba(74, 111, 165, 0.1);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.match-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.match-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.match-need,
.match-bring {
    margin-bottom: 0;
}

.match-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 6px;
    text-transform: uppercase;
}

.match-label.accent-text {
    color: var(--accent);
}

.match-need p,
.match-bring p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

.approach-quote {
    background: var(--bg-card);
    border-left: 4px solid var(--accent);
    border-radius: 0 var(--radius) var(--radius) 0;
    padding: 28px 32px;
    margin-bottom: 40px;
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-primary);
    line-height: 1.6;
    box-shadow: var(--shadow-sm);
}

.approach-quote cite {
    display: block;
    font-size: 0.82rem;
    font-style: normal;
    color: var(--text-muted);
    margin-top: 12px;
}

.approach-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 48px;
}

.approach-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.approach-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.approach-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.approach-letter {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: white;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1rem;
    border-radius: 10px;
    flex-shrink: 0;
}

.approach-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0;
}

.approach-card p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 14px;
}

.approach-relevance {
    padding: 12px 16px;
    background: var(--accent-subtle);
    border-radius: var(--radius);
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.approach-relevance span {
    font-weight: 700;
    color: var(--accent);
}

.process-section {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 36px;
    margin-bottom: 32px;
}

.process-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 28px;
    text-align: center;
}

.process-steps {
    display: flex;
    align-items: flex-start;
    gap: 0;
    justify-content: center;
    flex-wrap: wrap;
}

.process-step {
    flex: 1;
    min-width: 180px;
    max-width: 240px;
    text-align: center;
    padding: 0 16px;
}

.process-connector {
    width: 40px;
    height: 2px;
    background: var(--border);
    margin-top: 24px;
    flex-shrink: 0;
}

.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--accent);
    color: white;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 50%;
    margin-bottom: 12px;
}

.process-step h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.process-step p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.process-ethics {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--border-light);
    flex-wrap: wrap;
}

.process-ethics > span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

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

.llm-insight {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.llm-insight h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 14px;
}

.llm-insight p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 14px;
}

.llm-insight ul {
    list-style: none;
    padding: 0;
    margin-bottom: 16px;
}

.llm-insight li {
    position: relative;
    padding-left: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 8px;
}

.llm-insight li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
}

.llm-source {
    font-size: 0.78rem !important;
    color: var(--text-muted) !important;
    font-style: italic;
}

.timeline {
    position: relative;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    margin-bottom: 36px;
}

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

.timeline-marker {
    position: absolute;
    left: -32px;
    top: 6px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 3px solid var(--accent);
    z-index: 1;
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 8px;
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.timeline-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.timeline-company {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 10px;
}

.timeline-content > p:not(.timeline-company) {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 14px;
}

.timeline-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.timeline-stats span {
    padding: 4px 12px;
    background: var(--accent-subtle);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 14px;
}

.impact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.impact-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 28px;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s, box-shadow 0.2s;
}

.impact-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.impact-duration {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.05em;
    margin-bottom: 10px;
}

.impact-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.impact-card > p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 16px;
    flex-grow: 1;
}

.impact-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.impact-stat {
    padding-top: 14px;
    border-top: 1px solid var(--border-light);
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.impact-num {
    font-family: var(--font-mono);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
}

.impact-stat span:last-child {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.skills-list {
    display: grid;
    gap: 12px;
}

.skill-item {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    transition: transform 0.2s, box-shadow 0.2s;
}

.skill-item:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.skill-check {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--green);
    color: white;
    font-weight: 700;
    font-size: 0.9rem;
    border-radius: 50%;
    margin-top: 2px;
}

.skill-text strong {
    display: block;
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 6px;
    line-height: 1.4;
}

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

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.contact-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 24px;
}

.contact-item {
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

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

.contact-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.contact-item a {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 500;
    transition: color 0.2s;
}

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

.contact-item span:not(.contact-label) {
    font-size: 0.92rem;
    color: var(--text-secondary);
}

.terminal-block {
    background: var(--bg-terminal);
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 100%;
}

.terminal-header-mini {
    display: flex;
    gap: 6px;
    padding: 12px 16px;
    background: rgba(0,0,0,0.2);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.terminal-block pre {
    padding: 20px;
    margin: 0;
}

.terminal-block code {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-light);
    line-height: 1.7;
}

.footer {
    padding: 32px 24px;
    text-align: center;
    border-top: 1px solid var(--border-light);
    background: var(--bg-secondary);
}

.footer p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.footer-sub {
    font-size: 0.75rem !important;
    color: var(--text-muted) !important;
    margin-top: 4px;
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 900px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .hero-photo {
        width: 160px;
        height: 200px;
    }

    .hero h1 {
        font-size: 2rem;
    }

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

    .approach-grid {
        gap: 12px;
    }

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

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

    .match-columns {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .process-connector {
        display: none;
    }

    .process-steps {
        gap: 24px;
    }
}

@media (max-width: 600px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: rgba(245, 245, 245, 0.98);
        backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 16px 24px;
        gap: 12px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: var(--shadow-md);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 100px 20px 60px;
    }

    .hero h1 {
        font-size: 1.65rem;
    }

    .hero-sub {
        font-size: 0.95rem;
    }

    .section {
        padding: 24px 0;
    }

    .section-header h2 {
        font-size: 1.6rem;
    }

    .terminal-bar {
        font-size: 0.72rem;
    }

    .card-stats {
        gap: 16px;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        text-align: center;
        justify-content: center;
    }
}