/* CSS Reset & Base Styles */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #FFFFFF;
    --color-surface: #FAFAFA;
    --color-cream: #FDF8F3;
    --color-text: #1a1a1a;
    --color-text-muted: #6b7280;
    --color-border: rgba(0, 0, 0, 0.1);
    --color-pill-bg: #E9EAEC;
    --color-accent: #1a1a1a;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;
    --transition: 0.3s ease;
    --radius: 12px;
    --radius-lg: 16px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-size: 17px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: opacity var(--transition);
}

a:hover {
    opacity: 0.7;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Typography */
h1 {
    font-family: var(--font-serif);
    font-size: clamp(48px, 10vw, 80px);
    font-weight: 500;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

h2 {
    font-family: var(--font-serif);
    font-size: clamp(28px, 5vw, 32px);
    font-weight: 500;
    letter-spacing: -0.01em;
    line-height: 1.2;
}

h3 {
    font-size: 20px;
    font-weight: 600;
}

/* Header & Navigation */
.header {
    position: sticky;
    top: 0;
    background: var(--color-bg);
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
}

.logo {
    width: 48px;
    height: 48px;
    background: var(--color-text);
    color: var(--color-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 18px;
}

.logo:hover {
    opacity: 1;
}

.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
    display: block;
    background: var(--color-text);
    height: 2px;
    width: 24px;
    position: relative;
    transition: var(--transition);
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
    content: '';
    position: absolute;
}

.nav-toggle-label span::before {
    top: -8px;
}

.nav-toggle-label span::after {
    top: 8px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-links a {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-muted);
}

.nav-links a:hover {
    color: var(--color-text);
    opacity: 1;
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem;
}

.hero-content {
    flex: 1;
}

.hero-tag {
    display: inline-block;
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.hero h1 {
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--color-text-muted);
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.hero-stat {
    display: flex;
    flex-direction: column;
}

.hero-stat-number {
    font-family: var(--font-serif);
    font-size: 32px;
    font-weight: 500;
    color: var(--color-text);
}

.hero-stat-label {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

.hero-visual {
    flex-shrink: 0;
}

.hero-cards {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: 480px;
}

.hero-card {
    display: grid;
    grid-template-columns: 48px 1fr 1.2fr 40px;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    text-decoration: none;
    color: inherit;
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.hero-card:hover {
    border-color: var(--color-text);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transform: translateX(4px);
    opacity: 1;
}

.hero-card-logo {
    width: 48px;
    height: 48px;
    background: var(--color-cream);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-card-logo svg {
    width: 24px;
    height: 24px;
    color: var(--color-text);
}

.hero-card-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

.hero-card-logo.logo-square {
    border-radius: 4px;
}

.hero-card-logo.logo-square img {
    border-radius: 2px;
}

.hero-card-info {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.hero-card-info h3 {
    font-size: 15px;
    font-weight: 600;
    margin: 0;
}

.hero-card-info span {
    font-size: 13px;
    color: var(--color-text-muted);
}

.hero-card-points {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.hero-card-points li {
    font-size: 12px;
    color: var(--color-text-muted);
    padding-left: 0.75rem;
    position: relative;
}

.hero-card-points li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-text-muted);
}

.hero-card-arrow {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.3;
    transition: opacity var(--transition), transform var(--transition);
}

.hero-card:hover .hero-card-arrow {
    opacity: 1;
    transform: translateX(4px);
}

.hero-card-arrow svg {
    width: 20px;
    height: 20px;
    color: var(--color-text);
}

/* Section Styles */
section {
    padding: 6rem 2rem;
}

.section-header {
    max-width: 1200px;
    margin: 0 auto 3rem;
}

.section-desc {
    color: var(--color-text-muted);
    font-size: 17px;
    margin-top: 0.5rem;
}

/* Ventures Section */
.ventures {
    max-width: 1200px;
    margin: 0 auto;
}

.ventures-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.venture-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
    cursor: pointer;
}

.venture-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.venture-image {
    aspect-ratio: 2/1;
    width: 100%;
    position: relative;
    border-bottom: 1px solid var(--color-border);
}

.venture-company-logo {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    width: 32px;
    height: 32px;
    background: var(--color-surface);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.venture-company-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

.venture-project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
}

.venture-content {
    padding: 1.25rem;
    position: relative;
}

.venture-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 500;
    color: #16a34a;
    margin-bottom: 0.5rem;
}

.badge-exit {
    color: #ca8a04;
}

.badge-oss {
    color: #2563eb;
}

.venture-content h3 {
    font-size: 18px;
    margin-bottom: 0.5rem;
}

.venture-content p {
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.5;
}

.venture-title-link {
    color: inherit;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.venture-title-link:hover {
    text-decoration: underline;
    opacity: 1;
}

.venture-title-link svg {
    opacity: 0.5;
    flex-shrink: 0;
}

.venture-read-more {
    display: inline-block;
    margin-top: 1rem;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
}

.venture-read-more:hover {
    text-decoration: underline;
    opacity: 1;
}

/* Tech Stack Card */
.venture-card-techstack {
    background: var(--color-surface);
}

.venture-card-techstack .venture-content {
    padding: 1.5rem;
}

.venture-card-techstack .venture-badge {
    color: #7c3aed;
}

.venture-card-techstack h3 {
    margin-bottom: 0.5rem;
}

.venture-card-techstack > .venture-content > p {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 1.25rem;
}

.techstack-carousels {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.techstack-row {
    overflow: hidden;
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.techstack-track {
    display: flex;
    gap: 0.5rem;
    width: max-content;
    animation: scroll-left 20s linear infinite;
}

.techstack-track-reverse {
    animation: scroll-right 20s linear infinite;
}

.techstack-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.85rem 0.4rem 0.5rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 13px;
    color: var(--color-text);
    white-space: nowrap;
}

.techstack-item img {
    width: 18px;
    height: 18px;
    object-fit: contain;
    border-radius: 3px;
}

@keyframes scroll-left {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

@keyframes scroll-right {
    0% {
        transform: translateX(-50%);
    }
    100% {
        transform: translateX(0);
    }
}

.venture-card-techstack:hover .techstack-track {
    animation-play-state: paused;
}

/* Education Section */
.education {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.education .section-header {
    text-align: center;
    max-width: 1200px;
    margin: 0 auto 3rem;
}

.education-timeline {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    padding: 0 2rem;
    gap: 1.5rem;
}

.education-timeline::before {
    content: '';
    position: absolute;
    left: 2rem;
    right: 2rem;
    top: 28px;
    height: 2px;
    background: var(--color-border);
}

.education-timeline::after {
    content: '';
    position: absolute;
    left: 1rem;
    top: 23px;
    width: 0;
    height: 0;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    border-right: 10px solid var(--color-border);
}

.education-item {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    text-align: center;
}

.education-logo {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--color-bg);
    border: 3px solid var(--color-border);
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    position: relative;
    z-index: 1;
    flex-shrink: 0;
}

.education-item:hover .education-logo {
    transform: scale(1.1);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.education-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.education-info {
    margin-top: 0.75rem;
}

.education-info h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.education-date {
    font-size: 12px;
    color: var(--color-text-muted);
    display: block;
    margin-bottom: 0.25rem;
}

.education-info p {
    font-size: 12px;
    color: var(--color-text-muted);
    line-height: 1.4;
}

.education-hover {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: 220px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.75rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
    z-index: 10;
    margin-top: 0.5rem;
}

.education-item:hover .education-hover {
    opacity: 1;
    visibility: visible;
}

.education-hover p {
    font-size: 12px;
    color: var(--color-text-muted);
    line-height: 1.5;
    margin: 0;
}

/* Journey Section */
.journey {
    max-width: 1200px;
    margin: 0 auto;
}

.journey .section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.timeline-item {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
}

.timeline-item:last-child {
    border-bottom: none;
}

.timeline-date {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-muted);
    padding-top: 0.25rem;
}

.timeline-content h3 {
    margin-bottom: 0.25rem;
}

.timeline-company {
    font-size: 15px;
    color: var(--color-text-muted);
    display: block;
    margin-bottom: 0.75rem;
}

.timeline-content p {
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* Testimonials Section */
.testimonials {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.testimonials .section-header {
    text-align: center;
    max-width: 1200px;
    margin: 0 auto 3rem;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.testimonial-card {
    background: var(--color-cream);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.testimonial-stars {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 1rem;
}

.testimonial-stars svg {
    width: 18px;
    height: 18px;
    color: #facc15;
}

.testimonial-card p {
    font-size: 16px;
    line-height: 1.7;
    margin-bottom: 1.5rem;
    color: var(--color-text);
}

.testimonial-card footer {
    display: flex;
    flex-direction: column;
}

.testimonial-card strong {
    font-weight: 600;
    font-size: 15px;
}

.testimonial-card footer span {
    font-size: 14px;
    color: var(--color-text-muted);
}

/* Contact Section */
.contact {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-content h2 {
    margin-bottom: 1rem;
}

.contact-content > p {
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

.contact-socials {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.social-link {
    width: 48px;
    height: 48px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition), border-color var(--transition);
}

.social-link:hover {
    background: var(--color-text);
    border-color: var(--color-text);
    opacity: 1;
}

.social-link:hover svg {
    color: var(--color-bg);
}

.social-link svg {
    width: 20px;
    height: 20px;
    color: var(--color-text);
    transition: color var(--transition);
}

.contact-form {
    text-align: left;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group {
    margin-bottom: 1rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 16px;
    color: var(--color-text);
    transition: border-color var(--transition);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--color-text-muted);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-text);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    width: 100%;
    padding: 1rem 2rem;
    background: var(--color-text);
    color: var(--color-bg);
    border: none;
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity var(--transition), transform var(--transition);
}

.btn-submit:hover {
    opacity: 0.85;
    transform: translateY(-2px);
}

/* Project Page */
.project-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

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

.back-link {
    display: inline-block;
    font-size: 14px;
    color: var(--color-text-muted);
    text-decoration: none;
    margin-bottom: 2rem;
    transition: color var(--transition);
}

.back-link:hover {
    color: var(--color-text);
    opacity: 1;
}

.project-header .project-company-logo {
    position: static;
    width: 48px;
    height: 48px;
    margin-bottom: 1.5rem;
    background: var(--color-surface);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.project-header .project-company-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

.project-header h1 {
    font-family: var(--font-serif);
    font-size: clamp(32px, 6vw, 48px);
    font-weight: 500;
    margin-bottom: 1rem;
}

.project-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.project-badge {
    font-size: 12px;
    font-weight: 500;
    color: #16a34a;
}

.project-role {
    font-size: 14px;
    color: var(--color-text-muted);
}

.project-hero-image {
    width: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 3rem;
    border: 1px solid var(--color-border);
}

.project-hero-image img {
    width: 100%;
    height: auto;
    display: block;
}

.project-content {
    max-width: 700px;
}

.project-section {
    margin-bottom: 2.5rem;
}

.project-section h2 {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 1rem;
}

.project-section p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text-muted);
}

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

.project-features li {
    font-size: 16px;
    color: var(--color-text-muted);
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.project-features li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-text);
}

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

.project-tag {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    background: var(--color-pill-bg);
    border-radius: 20px;
    font-size: 13px;
    color: var(--color-text);
}

.project-cta {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.btn-primary {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    background: var(--color-text);
    color: var(--color-bg);
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    transition: opacity var(--transition), transform var(--transition);
}

.btn-primary:hover {
    opacity: 0.85;
    transform: translateY(-2px);
}

/* Footer */
.footer {
    padding: 2rem;
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.footer p {
    font-size: 14px;
    color: var(--color-text-muted);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        gap: 3rem;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-cards {
        width: 100%;
        max-width: 500px;
    }

    .hero-card {
        grid-template-columns: 40px 1fr 40px;
    }

    .hero-card-points {
        display: none;
    }

    .ventures-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    /* Education timeline - responsive */
    .education-timeline {
        flex-wrap: wrap;
        gap: 2rem;
        justify-content: center;
    }

    .education-timeline::before,
    .education-timeline::after {
        display: none;
    }

    .education-item {
        flex: 0 0 auto;
        width: 45%;
    }

    .education-hover {
        width: 180px;
    }

    .nav-toggle-label {
        display: block;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav-toggle:checked ~ .nav-links {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle:checked ~ .nav-toggle-label span {
        background: transparent;
    }

    .nav-toggle:checked ~ .nav-toggle-label span::before {
        transform: rotate(45deg);
        top: 0;
    }

    .nav-toggle:checked ~ .nav-toggle-label span::after {
        transform: rotate(-45deg);
        top: 0;
    }

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

    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
        align-items: center;
    }

    .timeline-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    section {
        padding: 4rem 1.5rem;
    }

    .nav {
        padding: 1rem 1.5rem;
    }

    .hero {
        padding: 4rem 1.5rem;
    }

    .hero-cards {
        width: 100%;
    }

    .hero-card {
        grid-template-columns: 36px 1fr 32px;
        padding: 0.875rem 1rem;
    }

    .hero-card-logo {
        width: 36px;
        height: 36px;
    }

    .hero-card-logo svg {
        width: 18px;
        height: 18px;
    }

    h1 {
        font-size: 40px;
    }
}