:root {
    --color-white: #ffffff;
    --color-black: #020202;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #525252;
    --color-gray-900: #020202;
    
    --spacing: 0.25rem;
    --container-max: 80rem;
    --container-4xl: 56rem;
    
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
    
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-padding-top: 100px;
}

body {
    font-family: var(--font-sans);
    line-height: 1.625;
    color: var(--color-gray-900);
    background-color: var(--color-white);
    font-size: 16px;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: -0.025em;
}

p {
    margin-bottom: 1rem;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
}

@media (min-width: 768px) {
    .container {
        padding: 0 3rem;
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 4rem;
    }
}

.max-w-4xl {
    max-width: var(--container-4xl);
}

.header {
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    background-color: var(--color-white);
    z-index: 100;
    border-bottom: 1px solid var(--color-gray-200);
}

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

.profile-avatar {
    display: flex;
    align-items: center;
    cursor: pointer;
    text-decoration: none;
}

.avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    background-color: var(--color-gray-900);
    color: var(--color-white);
    border: 0.5px solid var(--color-gray-200);
}

.avatar-img {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    object-fit: cover;
    border: 0.5px solid var(--color-gray-200);
    background-color: var(--color-gray-100);
    padding: 0.25rem;
    box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1);
}

.nav-pills {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    background-color: var(--color-gray-100);
    border-radius: 9999px;
    padding: 0.25rem;
    height: 3rem;
    box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
}

.nav-pill {
    padding: 0.625rem 1.75rem;
    border-radius: 9999px;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--color-gray-600);
    cursor: pointer;
}

.nav-pill:hover {
    color: var(--color-gray-900);
    background-color: var(--color-gray-200);
}

.nav-pill.active {
    background-color: var(--color-white);
    color: var(--color-gray-900);
    box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1);
}

.main-content {
    min-height: 100vh;
}

.hero-section {
    padding: 5rem 0;
    background: linear-gradient(to bottom, var(--color-white) 0%, var(--color-gray-50) 100%);
    border-bottom: 1px solid var(--color-gray-200);
}

@media (min-width: 768px) {
    .hero-section {
        padding: 8rem 0;
    }
}

.hero-wrapper {
    max-width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
    position: relative;
}

.hero-content-wrapper {
    flex: 1;
    max-width: 600px;
}

.business-card-container {
    flex-shrink: 0;
    perspective: 1000px;
    margin-right: 0;
}

.business-card {
    width: 350px;
    height: auto;
    position: relative;
    transform-style: preserve-3d;
    cursor: pointer;
    aspect-ratio: 3.5 / 2;
}

.card-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 0;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    transition: transform 0.6s cubic-bezier(0.4, 0.2, 0.2, 1);
}

.card-face img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.card-front {
    transform: rotateY(0deg);
}

.card-back {
    transform: rotateY(180deg);
}

.business-card.flipped .card-front {
    transform: rotateY(-180deg);
}

.business-card.flipped .card-back {
    transform: rotateY(0deg);
}

@media (max-width: 1024px) {
    .hero-wrapper {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .business-card {
        width: 100%;
        max-width: 350px;
    }
}

.hero-title {
    font-size: clamp(1.875rem, 5vw, 3.75rem);
    font-weight: 500;
    letter-spacing: -0.025em;
    margin-bottom: 3rem;
    color: var(--color-gray-900);
}

.hero-subtitle-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    margin: 0;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    margin: 0;
}

.content-section {
    padding: 4rem 0;
    border-bottom: 1px solid var(--color-gray-200);
}

@media (min-width: 768px) {
    .content-section {
        padding: 5rem 0;
    }
}

.content-section:last-of-type {
    border-bottom: none;
}

.content-section:nth-child(even) {
    background-color: var(--color-gray-50);
}

.section-heading {
    font-size: clamp(1.875rem, 4vw, 2.25rem);
    font-weight: 500;
    letter-spacing: -0.025em;
    margin-bottom: 3rem;
    color: var(--color-gray-900);
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-gray-900);
    display: inline-block;
}

.section-subheading {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-gray-300);
    display: inline-block;
    margin-bottom: 1.5rem;
    color: var(--color-gray-900);
}

.text-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    font-size: 1.125rem;
    line-height: 1.625;
    color: var(--color-gray-900);
}

.text-content p {
    margin: 0;
}

.bullet-list {
    list-style: none;
    padding: 1.5rem;
    margin: 1.5rem 0;
    background-color: var(--color-white);
    border-left: 3px solid var(--color-gray-900);
    border-radius: 0.25rem;
}

.bullet-list li {
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    position: relative;
    color: var(--color-gray-900);
}

.bullet-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    font-weight: 600;
    color: var(--color-gray-900);
}

.experience-list {
    display: flex;
    flex-direction: column;
}

.experience-item {
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-gray-200);
}

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

.experience-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

@media (min-width: 768px) {
    .experience-header {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
    }
}

.experience-role {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-gray-900);
    margin-bottom: 0.25rem;
}

.experience-company {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    margin: 0;
}

.experience-date {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    white-space: nowrap;
}

.muted-text {
    color: var(--color-gray-500);
    font-weight: 400;
}

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

.project-entry:last-child {
    margin-bottom: 0;
}

.project-entry h3 {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--color-gray-900);
}

.project-entry p {
    margin: 0;
    color: var(--color-gray-900);
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
}

.contact-link {
    font-size: 1.125rem;
    color: var(--color-gray-900);
    text-decoration: underline;
    text-underline-offset: 4px;
    text-decoration-color: var(--color-gray-300);
    transition: var(--transition);
}

.contact-link:hover {
    text-decoration-color: var(--color-gray-900);
}

.footer {
    border-top: 1px solid var(--color-gray-200);
    padding: 2rem 0;
    margin-top: 4rem;
}

.footer-text {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    text-align: center;
    margin: 0;
}

.footer-link {
    color: var(--color-gray-900);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--color-gray-600);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.6s ease-out;
}

@media (max-width: 767px) {
    .nav-pills {
        gap: 0.125rem;
        padding: 0.125rem;
        height: 2.5rem;
    }
    
    .nav-pill {
        padding: 0.5rem 1rem;
        font-size: 0.8125rem;
    }
    
    .hero-section {
        padding: 3rem 0;
    }
    
    .hero-title {
        margin-bottom: 2rem;
    }
}

.bg-white {
    background-color: var(--color-white);
}

.text-gray-900 {
    color: var(--color-gray-900);
}

*:focus:not(:focus-visible) {
    outline: none;
}