/* ========================================
   RESET & VARIABLES
======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --white: #ffffff;
    --black: #000000;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;
    
    --accent: #000000;
    --accent-light: #404040;
    
    --font-primary: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: var(--white);
    color: var(--gray-800);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* ========================================
   NAVIGATION
======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--black);
    letter-spacing: -0.5px;
    transition: var(--transition);
}

.logo:hover {
    opacity: 0.7;
}

.logo-dot {
    color: var(--accent);
    font-size: 2rem;
}

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

.nav-link {
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: var(--transition);
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--black);
}

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

.contact-btn {
    padding: 0.7rem 1.5rem;
    background: var(--black);
    color: var(--white);
    border-radius: 50px;
    transition: var(--transition);
}

.contact-btn::after {
    display: none;
}

.contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--black);
    transition: var(--transition);
}

/* ========================================
   HERO SECTION
======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-label {
    display: inline-block;
    padding: 0.5rem 1.2rem;
    background: var(--gray-100);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-family: var(--font-display);
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 2rem;
    font-weight: 700;
}

.title-line {
    display: block;
    animation: fadeInUp 0.8s ease-out;
    animation-fill-mode: both;
}

.title-line:nth-child(1) {
    animation-delay: 0.2s;
}

.title-line:nth-child(2) {
    animation-delay: 0.4s;
}

.title-line.accent {
    color: var(--accent);
}

.hero-description {
    font-size: 1.1rem;
    color: var(--gray-600);
    margin-bottom: 3rem;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out 0.6s;
    animation-fill-mode: both;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 3rem;
    animation: fadeInUp 0.8s ease-out 0.8s;
    animation-fill-mode: both;
}

.stat-card {
    padding: 1.5rem;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 16px;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    border-color: var(--gray-300);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--gray-600);
}

.hero-actions {
    display: flex;
    gap: 1rem;
    animation: fadeInUp 0.8s ease-out 1s;
    animation-fill-mode: both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}

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

.btn-secondary:hover {
    background: var(--black);
    color: var(--white);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    height: 500px;
    animation: fadeInRight 1s ease-out 0.5s;
    animation-fill-mode: both;
}

.floating-card {
    position: absolute;
    padding: 1.5rem 2rem;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: float 3s ease-in-out infinite;
}

.floating-card i {
    font-size: 2rem;
    color: var(--black);
}

.floating-card span {
    font-weight: 600;
    font-size: 1.1rem;
}

.card-1 {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 45%;
    right: 10%;
    animation-delay: 0.5s;
}

.card-3 {
    bottom: 15%;
    left: 15%;
    animation-delay: 1s;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-500);
    font-size: 0.85rem;
    animation: fadeInUp 1.2s ease-out 1.5s;
    animation-fill-mode: both;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--gray-400);
    border-radius: 12px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--gray-400);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-down 2s ease-in-out infinite;
}

/* ========================================
   PAGE SECTIONS
======================================== */
.page-hero {
    padding: 10rem 0 5rem;
    text-align: center;
}

.page-header {
    max-width: 700px;
    margin: 0 auto;
}

.page-title {
    font-family: var(--font-display);
    font-size: 3.5rem;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease-out;
}

.page-subtitle {
    font-size: 1.2rem;
    color: var(--gray-600);
    animation: fadeInUp 0.8s ease-out 0.2s;
    animation-fill-mode: both;
}

.accent-text {
    color: var(--black);
    font-weight: 700;
}

/* ========================================
   ABOUT SECTION
======================================== */
.about-section {
    padding: 5rem 0 8rem;
}

.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.content-card {
    animation: fadeInUp 0.8s ease-out;
}

.content-card h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.content-card p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
    color: var(--gray-700);
}

.skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 2rem;
}

.skill-tag {
    padding: 0.6rem 1.2rem;
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.skill-tag:hover {
    background: var(--black);
    color: var(--white);
    border-color: var(--black);
}

.about-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-card {
    padding: 2rem;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 16px;
    transition: var(--transition);
    animation: fadeInRight 0.8s ease-out;
    animation-fill-mode: both;
}

.info-card:nth-child(1) { animation-delay: 0.2s; }
.info-card:nth-child(2) { animation-delay: 0.4s; }
.info-card:nth-child(3) { animation-delay: 0.6s; }
.info-card:nth-child(4) { animation-delay: 0.8s; }

.info-card:hover {
    transform: translateX(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.icon-box {
    width: 50px;
    height: 50px;
    background: var(--black);
    color: var(--white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.info-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
}

.info-card p {
    color: var(--gray-600);
    line-height: 1.6;
}

/* ========================================
   BLOG SECTION
======================================== */
.blog-section {
    padding: 3rem 0 8rem;
}

.categories {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 4rem;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.4s;
    animation-fill-mode: both;
}

.category-btn {
    padding: 0.7rem 1.5rem;
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: 50px;
    color: var(--gray-700);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
}

.category-btn:hover,
.category-btn.active {
    background: var(--black);
    color: var(--white);
    border-color: var(--black);
}

.loading {
    text-align: center;
    padding: 5rem 0;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--black);
    border-radius: 50%;
    margin: 0 auto 1rem;
    animation: spin 1s linear infinite;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.writeup-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition);
    animation: fadeInUp 0.6s ease-out;
    animation-fill-mode: both;
}

.writeup-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--gray-300);
}

.writeup-card a {
    display: block;
    padding: 2rem;
    text-decoration: none;
    color: inherit;
}

.card-icon {
    width: 60px;
    height: 60px;
    background: var(--gray-100);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.writeup-card:hover .card-icon {
    background: var(--black);
    color: var(--white);
}

.card-category {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--gray-500);
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.card-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--black);
}

.card-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-600);
    font-size: 0.9rem;
    transition: var(--transition);
}

.writeup-card:hover .card-link {
    color: var(--black);
    gap: 0.8rem;
}

/* ========================================
   CONTACT SECTION
======================================== */
.contact-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 10rem 0;
}

.contact-wrapper {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.contact-header {
    margin-bottom: 4rem;
    animation: fadeInUp 0.8s ease-out;
}

.contact-content {
    margin-bottom: 4rem;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

.info-item {
    display: flex;
    gap: 1.5rem;
    padding: 2rem;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 16px;
    text-align: left;
    transition: var(--transition);
    animation: fadeInUp 0.8s ease-out;
    animation-fill-mode: both;
}

.info-item:nth-child(1) { animation-delay: 0.2s; }
.info-item:nth-child(2) { animation-delay: 0.4s; }

.info-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.info-item i {
    font-size: 1.8rem;
    color: var(--black);
}

.info-item h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.info-item p,
.info-item a {
    color: var(--gray-600);
    text-decoration: none;
    transition: var(--transition);
}

.info-item a:hover {
    color: var(--black);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    animation: fadeInUp 0.8s ease-out 0.6s;
    animation-fill-mode: both;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem 2rem;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 50px;
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 600;
    transition: var(--transition);
}

.social-link i {
    font-size: 1.3rem;
}

.social-link:hover {
    background: var(--black);
    color: var(--white);
    border-color: var(--black);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.contact-footer {
    padding-top: 3rem;
    border-top: 1px solid var(--gray-200);
    color: var(--gray-500);
    font-size: 0.9rem;
    animation: fadeInUp 0.8s ease-out 0.8s;
    animation-fill-mode: both;
}

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

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

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes scroll-down {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(15px);
    }
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ========================================
   RESPONSIVE
======================================== */
@media (max-width: 968px) {
    .hero .container,
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-visual {
        height: 300px;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .page-title {
        font-size: 2.5rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}