/* ===== CSS Variables ===== */
:root {
    --color-bg: #fafafa;
    --color-text: #1a1a1a;
    --color-text-light: #666666;
    --color-border: #e0e0e0;
    --color-accent: #2a2a2a;
    --color-overlay: rgba(0, 0, 0, 0.7);
    
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Space Grotesk', sans-serif;
    
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
}

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

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

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    cursor: none;
}

/* ===== Custom Cursor ===== */
.cursor,
.cursor-follower {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    mix-blend-mode: difference;
}

.cursor {
    width: 8px;
    height: 8px;
    background: white;
    transition: transform 0.1s var(--transition-smooth);
}

.cursor-follower {
    width: 40px;
    height: 40px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    transition: transform 0.3s var(--transition-smooth), opacity 0.3s;
}

.cursor.hover,
.cursor-follower.hover {
    transform: scale(2);
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s var(--transition-smooth);
}

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

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    background: rgba(250, 250, 250, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: all 0.3s var(--transition-smooth);
}

.navbar.scrolled {
    border-bottom-color: var(--color-border);
}

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

.logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-text);
    transition: width 0.3s var(--transition-smooth);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-text);
    transition: all 0.3s var(--transition-smooth);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.greeting {
    font-size: 1rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
    opacity: 0;
    animation: fadeInUp 0.8s var(--transition-smooth) forwards;
}

.name {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -2px;
    opacity: 0;
    animation: fadeInUp 0.8s var(--transition-smooth) 0.2s forwards;
}

.title {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 400;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
    opacity: 0;
    animation: fadeInUp 0.8s var(--transition-smooth) 0.4s forwards;
}

.description {
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    opacity: 0;
    animation: fadeInUp 0.8s var(--transition-smooth) 0.6s forwards;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    opacity: 0;
    animation: fadeInUp 0.8s var(--transition-smooth) 0.8s forwards;
}

/* ===== Buttons ===== */
.btn {
    padding: 1rem 2rem;
    font-size: 0.95rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 0.3s var(--transition-smooth);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--color-accent);
    color: white;
}

.btn-primary:hover {
    background: var(--color-text);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-text);
    transform: translateY(-2px);
}

/* ===== Hero Image ===== */
.hero-image {
    position: relative;
    opacity: 0;
    animation: fadeIn 1s var(--transition-smooth) 1s forwards;
}

.image-container {
    position: relative;
    border-radius: 2px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.profile-img {
    width: 100%;
    height: auto;
    display: block;
    filter: grayscale(100%);
    transition: filter 0.5s var(--transition-smooth);
}

.image-container:hover .profile-img {
    filter: grayscale(0%);
}

.image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, rgba(0,0,0,0.1), transparent);
    pointer-events: none;
}

/* ===== Scroll Indicator ===== */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.8rem;
    color: var(--color-text-light);
    opacity: 0;
    animation: fadeIn 1s var(--transition-smooth) 1.5s forwards;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-text), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

/* ===== Section Styles ===== */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.section-number {
    font-family: var(--font-display);
    font-size: 0.9rem;
    color: var(--color-text-light);
    font-weight: 400;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 600;
}

/* ===== About Section ===== */
.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
}

.lead {
    font-size: 1.3rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.about-text p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.skills h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.skill-tag {
    padding: 0.5rem 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.3s var(--transition-smooth);
}

.skill-tag:hover {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.stat {
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    text-align: center;
    transition: all 0.3s var(--transition-smooth);
}

.stat:hover {
    border-color: var(--color-text);
    transform: translateY(-5px);
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

/* ===== Work Section ===== */
.projects-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.project-card {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-md);
    align-items: center;
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    transition: all 0.4s var(--transition-smooth);
}

.project-card:hover {
    border-color: var(--color-text);
    transform: translateY(-5px);
}

.project-image {
    position: relative;
    overflow: hidden;
    border-radius: 2px;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    transition: all 0.5s var(--transition-smooth);
}

.project-card:hover .project-image img {
    filter: grayscale(0%);
    transform: scale(1.05);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: var(--color-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s var(--transition-smooth);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-link {
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
}

.project-info {
    padding: var(--spacing-sm);
}

.project-title {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-xs);
}

.project-description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.project-tags span {
    font-size: 0.85rem;
    color: var(--color-text-light);
    padding: 0.25rem 0.75rem;
    background: var(--color-bg);
}

/* ===== Contact Section ===== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.contact-text {
    font-size: 1.2rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

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

.contact-link {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    transition: all 0.3s var(--transition-smooth);
}

.contact-link:hover {
    border-color: var(--color-text);
    transform: translateX(10px);
}

.link-label {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.link-value {
    font-weight: 600;
    font-size: 1.1rem;
}

/* ===== Contact Form ===== */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--color-border);
    background: transparent;
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all 0.3s var(--transition-smooth);
    outline: none;
}

.form-group label {
    position: absolute;
    left: 1rem;
    top: 1rem;
    color: var(--color-text-light);
    pointer-events: none;
    transition: all 0.3s var(--transition-smooth);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-text);
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -0.5rem;
    left: 0.75rem;
    font-size: 0.8rem;
    background: var(--color-bg);
    padding: 0 0.25rem;
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

/* ===== Footer ===== */
.footer {
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-text {
    font-family: var(--font-display);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.footer-copy {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scrollPulse {
    0%, 100% {
        transform: scaleY(1);
        opacity: 1;
    }
    50% {
        transform: scaleY(0.5);
        opacity: 0.5;
    }
}

/* ===== Reveal on Scroll ===== */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s var(--transition-smooth);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Responsive Design ===== */
@media (max-width: 968px) {
    .hero-content,
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .project-card {
        grid-template-columns: 1fr;
    }
    
    .hero-image {
        order: -1;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: var(--color-bg);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-md);
        transition: right 0.4s var(--transition-smooth);
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .nav-toggle {
        display: flex;
        z-index: 1001;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
}

@media (max-width: 640px) {
    body {
        cursor: auto;
    }
    
    .cursor,
    .cursor-follower {
        display: none;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
}

/* ===== Smooth Scroll ===== */
@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;
    }
}