/* ===== Version 1: Professional ===== */
/* LinkedIn-ready, corporate polish, PM/analyst background */

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-card: #141414;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #707070;
    --accent: #0a66c2;
    --accent-hover: #004182;
    --accent-light: #378fe9;
    --border-color: #2a2a2a;
    --success: #057642;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    font-size: 16px;
}

h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.3;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; margin-bottom: 1.5rem; }
h3 { font-size: 1.4rem; margin-bottom: 1rem; }

p { margin-bottom: 1rem; }

a {
    color: var(--accent-light);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navigation - LinkedIn style */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 0.75rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

.nav-link {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: var(--text-primary);
    text-decoration: none;
}

/* Hero Section */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding: 6rem 0 4rem;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-name {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-tagline {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 700px;
}

/* Fork Section - Card Grid */
.fork-section {
    margin-top: 4rem;
}

.fork-title {
    text-align: center;
    margin-bottom: 2.5rem;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 1.2rem;
}

.fork-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.fork-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.75rem;
    transition: all 0.3s ease;
    display: block;
    text-decoration: none;
    position: relative;
}

.fork-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
    text-decoration: none;
}

.fork-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.fork-card h3 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.fork-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.fork-arrow {
    color: var(--accent-light);
    font-size: 0.9rem;
    font-weight: 500;
}

.fork-coming-soon {
    opacity: 0.6;
    cursor: not-allowed;
}

.fork-coming-soon:hover {
    transform: none;
    border-color: var(--border-color);
}

.coming-soon-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--accent);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Sections */
.section {
    padding: 5rem 0;
    background-color: var(--bg-primary);
}

.section-dark {
    background-color: var(--bg-secondary);
}

.section h2 {
    text-align: center;
    margin-bottom: 2rem;
}

.section-intro {
    text-align: center;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 3rem;
    font-size: 1.1rem;
}

/* Timeline - LinkedIn Experience Style */
.timeline {
    max-width: 900px;
    margin: 0 auto;
}

.timeline-item {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--border-color);
}

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

.timeline-year {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    padding-top: 0.25rem;
}

.timeline-content h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.timeline-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.timeline-content ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.timeline-content li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.timeline-current .timeline-year {
    color: var(--accent-light);
    font-weight: 600;
}

.timeline-now {
    background-color: rgba(10, 102, 194, 0.05);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid rgba(10, 102, 194, 0.2);
}

.key-lesson {
    padding-left: 1rem;
    border-left: 3px solid var(--accent);
    margin-top: 1.5rem;
    color: var(--text-primary);
}

/* Ventures Grid */
.ventures-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.venture-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    transition: transform 0.2s ease;
}

.venture-card:hover {
    transform: translateY(-2px);
}

.venture-status {
    display: inline-block;
    background-color: var(--success);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.venture-card h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.venture-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.venture-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--accent-light);
    font-weight: 500;
}

.venture-lesson {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.coming-soon-text {
    color: var(--text-muted);
    font-style: italic;
    font-size: 0.9rem;
}

/* Beliefs Grid */
.beliefs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.belief-card {
    background-color: var(--bg-card);
    border-left: 3px solid var(--accent);
    padding: 1.75rem;
    border-radius: 4px;
}

.belief-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.belief-explanation {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Connect Grid */
.connect-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 3rem 0;
}

.connect-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.75rem;
    text-align: center;
}

.connect-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.connect-card a {
    display: block;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--accent-light);
    font-weight: 500;
}

.connect-card p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin: 0;
}

.connect-work,
.connect-read {
    margin-top: 3rem;
    padding: 2rem;
    background-color: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.connect-work h3,
.connect-read h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.connect-work p,
.connect-read p {
    color: var(--text-secondary);
}

/* Footer */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 2rem;
}

.footer-content {
    text-align: center;
    margin-bottom: 2rem;
}

.footer-name {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.footer-location {
    color: var(--text-secondary);
}

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

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .hero-name {
        font-size: 2.2rem;
    }

    .hero-tagline {
        font-size: 1.1rem;
    }

    h2 {
        font-size: 1.6rem;
    }

    .nav-menu {
        gap: 1rem;
        font-size: 0.85rem;
    }

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

    .timeline-year {
        font-size: 0.85rem;
    }

    .fork-grid,
    .ventures-grid,
    .beliefs-grid,
    .connect-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .nav-menu {
        display: none;
    }

    .hero {
        padding: 5rem 0 3rem;
    }

    .container {
        padding: 0 1rem;
    }
}

/* ===== Secret Version Toggle ===== */
.version-toggle {
    text-align: center;
    padding: 2rem 0 1rem;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.toggle-trigger {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem 1rem;
    transition: all 0.2s ease;
    letter-spacing: 2px;
}

.toggle-trigger:hover {
    color: var(--accent);
}

.toggle-options {
    margin-top: 1rem;
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.toggle-label {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-right: 0.5rem;
}

.version-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.4rem 1rem;
    font-size: 0.85rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.version-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.version-btn.active {
    background-color: var(--accent);
    border-color: var(--accent);
    color: white;
}