/* ============================================
   Vinayak Kulkarni - Personal Website
   A calm, zen-inspired design
   ============================================ */

/* CSS Variables */
:root {
    /* Colors - Warm, muted palette */
    --color-bg: #faf9f7;
    --color-bg-alt: #f5f3f0;
    --color-text: #1a1a1a;
    --color-text-muted: #6b6b6b;
    --color-text-light: #999999;
    --color-accent: #8b7355;
    --color-accent-light: #a89070;
    --color-border: #e8e5e0;
    --color-border-light: #f0ede8;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 10rem;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-slower: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
    font-family: var(--font-sans);
    font-weight: 400;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Subtle grain texture overlay */
.grain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.03;
    z-index: 1000;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-md) 0;
    background: linear-gradient(to bottom, var(--color-bg) 0%, transparent 100%);
    transition: var(--transition-base);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: var(--transition-fast);
}

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

.nav-links {
    display: flex;
    gap: var(--space-lg);
}

.nav-links a {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-decoration: none;
    letter-spacing: 0.02em;
    transition: var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: var(--transition-base);
}

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

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

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--space-3xl) var(--space-lg);
    position: relative;
}

.hero-content {
    max-width: 900px;
    animation: fadeInUp 1s var(--transition-slower) forwards;
    opacity: 0;
}

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

.hero-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--color-border);
    border-radius: 2px;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 400;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-lg);
}

.hero-title-line {
    display: block;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    font-weight: 300;
    color: var(--color-text-muted);
    max-width: 600px;
    margin-bottom: var(--space-xl);
    line-height: 1.6;
}

.hero-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.meta-divider {
    width: 24px;
    height: 1px;
    background: var(--color-border);
}

.hero-scroll {
    position: absolute;
    bottom: var(--space-xl);
    left: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-light);
    animation: fadeInUp 1s 0.5s var(--transition-slower) forwards;
    opacity: 0;
}

.scroll-line {
    width: 40px;
    height: 1px;
    background: var(--color-border);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--color-accent);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0% { left: -100%; }
    50% { left: 100%; }
    100% { left: 100%; }
}

/* ============================================
   Sections
   ============================================ */
.section {
    padding: var(--space-3xl) 0;
}

.section-grid {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--space-xl);
}

.section-label {
    position: sticky;
    top: 120px;
    height: fit-content;
}

.label-number {
    display: block;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
}

.label-text {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-xl);
}

/* ============================================
   About Section
   ============================================ */
.about {
    background: var(--color-bg);
}

.about-text {
    max-width: 650px;
    margin-bottom: var(--space-2xl);
}

.about-text p {
    font-size: 1.0625rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.about-text p:first-child {
    font-size: 1.25rem;
    color: var(--color-text);
    font-weight: 300;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.stat {
    text-align: left;
}

.stat-number {
    display: block;
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 400;
    color: var(--color-text);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

/* ============================================
   Journey Section
   ============================================ */
.journey {
    background: var(--color-bg-alt);
}

.timeline {
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    padding-left: var(--space-xl);
    padding-bottom: var(--space-xl);
}

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

.timeline-marker {
    position: absolute;
    left: -4px;
    top: 8px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--color-bg-alt);
    border: 2px solid var(--color-accent);
    transition: var(--transition-base);
}

.timeline-item:hover .timeline-marker {
    background: var(--color-accent);
    transform: scale(1.2);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: var(--space-xs);
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.timeline-header h3 {
    font-size: 1.25rem;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.timeline-date {
    font-size: 0.8125rem;
    color: var(--color-text-light);
}

.timeline-role {
    font-size: 0.9375rem;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.timeline-desc {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    max-width: 600px;
    line-height: 1.7;
}

.timeline-item-faded {
    opacity: 0.6;
}

.timeline-item-faded:hover {
    opacity: 1;
}

/* ============================================
   Expertise Section
   ============================================ */
.expertise {
    background: var(--color-bg);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.expertise-card {
    padding: var(--space-lg);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border-light);
    border-radius: 4px;
    transition: var(--transition-base);
}

.expertise-card:hover {
    border-color: var(--color-border);
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.04);
}

.expertise-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.expertise-card h3 {
    font-size: 1.0625rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.01em;
}

.expertise-card p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ============================================
   Connect Section
   ============================================ */
.connect {
    background: var(--color-bg-alt);
}

.connect-text {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 550px;
    margin-bottom: var(--space-xl);
}

.connect-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.connect-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: 4px;
    text-decoration: none;
    color: var(--color-text);
    transition: var(--transition-base);
}

.connect-link:hover {
    border-color: var(--color-accent);
    transform: translateX(4px);
}

.connect-link-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    transition: var(--transition-fast);
}

.connect-link:hover .connect-link-icon {
    color: var(--color-accent);
}

.connect-link-text {
    flex: 1;
    font-weight: 500;
    letter-spacing: 0.01em;
}

.connect-link-arrow {
    font-size: 1.25rem;
    color: var(--color-text-light);
    transition: var(--transition-fast);
}

.connect-link:hover .connect-link-arrow {
    color: var(--color-accent);
    transform: translateX(4px);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.footer-name {
    font-weight: 500;
    color: var(--color-text-muted);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .section-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .section-label {
        position: relative;
        top: 0;
        display: flex;
        align-items: center;
        gap: var(--space-sm);
    }

    .label-number {
        margin-bottom: 0;
    }

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

@media (max-width: 768px) {
    :root {
        --space-lg: 1.5rem;
        --space-xl: 2.5rem;
        --space-2xl: 4rem;
        --space-3xl: 6rem;
    }

    .nav-links {
        gap: var(--space-md);
    }

    .hero {
        padding-top: 120px;
        min-height: auto;
        padding-bottom: var(--space-2xl);
    }

    .hero-scroll {
        display: none;
    }

    .hero-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
    }

    .meta-divider {
        display: none;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .stat {
        padding: var(--space-md) 0;
        border-bottom: 1px solid var(--color-border);
    }

    .stat:last-child {
        border-bottom: none;
    }

    .timeline-header {
        flex-direction: column;
        gap: var(--space-xs);
    }

    .footer-content {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }

    .nav-inner {
        padding: 0 var(--space-md);
    }

    .hero {
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }

    .hero-badge {
        font-size: 0.6875rem;
    }

    .connect-link {
        padding: var(--space-sm) var(--space-md);
    }
}

/* ============================================
   Animations
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* Scroll-triggered animations */
.section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* Selection */
::selection {
    background: var(--color-accent);
    color: white;
}

::-moz-selection {
    background: var(--color-accent);
    color: white;
}