/* ============================================
   Reset & Base Styles
   ============================================ */

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

:root {
    --color-primary: #1a1a1a;
    --color-secondary: #666666;
    --color-accent: #0066CC;
    --color-accent-hover: #0052A3;
    --color-bg: #FFFFFF;
    --color-bg-alt: #F8F9FA;
    --color-bg-subtle: #FAFBFC;
    --color-border: #E1E4E8;
    --color-border-light: #F0F0F0;

    --font-primary: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    color: var(--color-primary);
    background-color: var(--color-bg);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 700;
}

h2 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 600;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
}

p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-secondary);
}

.lead {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 400;
    color: var(--color-primary);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

/* ============================================
   Layout Utilities
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10rem 0;
}

.section-content {
    width: 100%;
}

.section-title {
    margin-bottom: 5rem;
    text-align: center;
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-slow);
}

.section-title.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Navigation
   ============================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition-smooth);
}

.nav.scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: -0.03em;
    transition: var(--transition-smooth);
}

.nav-logo:hover {
    opacity: 0.7;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 3rem;
}

.nav-link {
    color: var(--color-primary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    transition: var(--transition-smooth);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition-smooth);
}

.nav-link:hover {
    opacity: 0.7;
}

.nav-link:hover::after {
    width: 100%;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 2rem;
    position: relative;
}

.hero-content {
    max-width: 900px;
}

.hero-greeting {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    color: var(--color-secondary);
    margin-bottom: 0.5rem;
    font-weight: 400;
}

.hero-title {
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #000000 0%, #333333 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    color: var(--color-secondary);
    margin-bottom: 2rem;
    font-weight: 400;
    line-height: 1.7;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-interests {
    margin-bottom: 3rem;
}

.interests-label {
    font-size: 0.875rem;
    color: var(--color-secondary);
    margin-bottom: 1rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.interests-tags {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.interest-tag {
    font-size: 0.95rem;
    color: var(--color-primary);
    font-weight: 500;
    padding: 0.5rem 1rem;
    background-color: var(--color-bg-subtle);
    border: 1px solid var(--color-border-light);
    border-radius: 20px;
    transition: var(--transition-smooth);
}

.interest-tag:hover {
    background-color: var(--color-bg-alt);
    border-color: var(--color-border);
    transform: translateY(-2px);
}

.hero-cta {
    margin-top: 2rem;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 50px;
    border: 2px solid var(--color-primary);
    border-radius: 20px;
    opacity: 0.5;
    animation: fadeInOut 2s infinite;
}

.scroll-indicator span {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background-color: var(--color-primary);
    border-radius: 50%;
    animation: scrollDown 2s infinite;
}

@keyframes scrollDown {
    0%, 100% {
        transform: translate(-50%, 0);
        opacity: 0;
    }
    50% {
        transform: translate(-50%, 15px);
        opacity: 1;
    }
}

@keyframes fadeInOut {
    0%, 100% {
        opacity: 0.3;
    }
    50% {
        opacity: 0.7;
    }
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 12px;
    transition: var(--transition-smooth);
    cursor: pointer;
    border: none;
    font-family: var(--font-primary);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-bg);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--color-accent);
    transform: translateY(-1px) scale(1.02);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0) scale(0.98);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-bg);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* ============================================
   About Section
   ============================================ */

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

.about-text {
    max-width: 800px;
    margin: 0 auto;
}

.about-text p {
    margin-bottom: 2rem;
}

/* ============================================
   Expertise Section
   ============================================ */

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 4rem;
    margin-top: 5rem;
}

.expertise-card {
    text-align: center;
    padding: 3rem 2rem;
    background-color: var(--color-bg-subtle);
    border: 1px solid var(--color-border-light);
    border-radius: 16px;
    transition: var(--transition-smooth);
    opacity: 0;
    transform: translateY(30px);
}

.expertise-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.expertise-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-border);
    background-color: var(--color-bg);
}

.expertise-icon {
    margin-bottom: 2rem;
    color: var(--color-secondary);
    opacity: 0.7;
    transition: var(--transition-smooth);
}

.expertise-card:hover .expertise-icon {
    color: var(--color-accent);
    opacity: 1;
    transform: translateY(-2px);
}

.expertise-card h3 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.expertise-card p {
    font-size: 1.0625rem;
    line-height: 1.8;
}

/* ============================================
   Achievements Section
   ============================================ */

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

.achievements-list {
    max-width: 900px;
    margin: 0 auto;
}

.achievement-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 4rem;
    padding: 4rem 0;
    border-bottom: 1px solid var(--color-border);
    opacity: 0;
    transform: translateX(-30px);
    transition: var(--transition-slow);
}

.achievement-item.visible {
    opacity: 1;
    transform: translateX(0);
}

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

.achievement-year {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-accent);
    padding-top: 0.25rem;
}

.achievement-content h3 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.achievement-content p {
    font-size: 1.0625rem;
    line-height: 1.8;
}

/* ============================================
   Blog Section
   ============================================ */

.blog-preview {
    background-color: var(--color-bg);
    min-height: auto; /* Don't force full viewport height */
    padding: 6rem 0; /* Reduce padding when empty */
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 3rem;
    margin-bottom: 4rem;
}

.blog-card {
    background-color: var(--color-bg-alt);
    border-radius: 16px;
    padding: 2.5rem;
    transition: var(--transition-smooth);
    opacity: 0;
    transform: translateY(30px);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.blog-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.blog-card-meta {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    color: var(--color-accent);
}

.blog-card-date {
    font-weight: 500;
}

.blog-card-read-time {
    color: var(--color-secondary);
}

.blog-card-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    line-height: 1.3;
    color: var(--color-primary);
}

.blog-card-excerpt {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-secondary);
    margin-bottom: 1.5rem;
}

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

.blog-tag {
    font-size: 0.8rem;
    padding: 0.35rem 0.75rem;
    background-color: var(--color-bg);
    border-radius: 20px;
    color: var(--color-secondary);
    font-weight: 500;
}

.blog-cta {
    text-align: center;
    margin-top: 3rem;
}

/* Blog Page Specific Styles */
.blog-page {
    min-height: 100vh;
    padding-top: 8rem;
    padding-bottom: 6rem;
}

.blog-page .blog-grid {
    margin-bottom: 0;
}

.blog-header {
    text-align: center;
    margin-bottom: 5rem;
}

.blog-header h1 {
    font-size: clamp(3rem, 6vw, 5rem);
    margin-bottom: 1.5rem;
}

.blog-header p {
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Individual Blog Post Styles */
.post-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 8rem 2rem 6rem;
}

.post-header {
    margin-bottom: 4rem;
}

.post-meta {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    margin-bottom: 2rem;
    font-size: 0.95rem;
    color: var(--color-secondary);
}

.post-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.post-content {
    font-size: 1.125rem;
    line-height: 1.8;
}

.post-content p {
    margin-bottom: 2rem;
    color: var(--color-primary);
}

.post-content em {
    font-style: italic;
    color: var(--color-primary);
}

.post-content strong {
    font-weight: 600;
    color: var(--color-primary);
}

/* Blog Post Images */
.post-image {
    margin: 3rem 0;
    text-align: center;
}

.post-image img {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    transition: var(--transition-smooth);
}

.post-image img:hover {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.post-image-caption {
    margin-top: 1rem;
    font-size: 0.95rem;
    color: var(--color-secondary);
    font-style: italic;
    line-height: 1.6;
}

.post-tags {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid var(--color-border);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 3rem;
    transition: var(--transition-smooth);
}

.back-link:hover {
    opacity: 0.7;
}

/* ============================================
   Connect Section
   ============================================ */

.connect {
    text-align: center;
}

.connect-content {
    max-width: 700px;
    margin: 0 auto;
}

.connect-text {
    font-size: 1.25rem;
    margin-bottom: 4rem;
}

.connect-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    padding: 3rem 0;
    text-align: center;
    background-color: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

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

/* ============================================
   Animation Classes
   ============================================ */

.fade-in {
    animation: fadeIn 1s ease-out forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-slow);
}

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

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    .nav-menu {
        gap: 1.5rem;
    }

    .nav-link {
        font-size: 0.85rem;
    }

    section {
        padding: 6rem 0;
    }

    .section-title {
        margin-bottom: 3rem;
    }

    .hero-tagline {
        margin-bottom: 2.5rem;
    }

    .expertise-grid,
    .blog-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .blog-card {
        padding: 2rem;
    }

    .post-container {
        padding: 6rem 1.5rem 4rem;
    }

    .post-title {
        font-size: 2rem;
    }

    .post-image {
        margin: 2rem 0;
    }

    .post-image img {
        border-radius: 8px;
    }

    .achievement-item {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 3rem 0;
    }

    .achievement-year {
        font-size: 1rem;
    }

    .connect-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .container {
        padding: 0 1.5rem;
    }

    .nav-container {
        padding: 1rem 1.5rem;
    }
}

@media (max-width: 480px) {
    .nav-menu {
        gap: 1rem;
    }

    .nav-link {
        font-size: 0.8rem;
    }

    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

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

    .lead {
        font-size: 1.25rem;
    }

    p {
        font-size: 1rem;
    }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
    .nav,
    .scroll-indicator,
    .btn {
        display: none;
    }

    section {
        page-break-inside: avoid;
    }
}