/* ========================================
   CSS Variables & Reset
======================================== */

:root {
    /* Colors */
    --primary-color: #0ea5e9;
    --primary-dark: #0284c7;
    --primary-light: #38bdf8;
    --secondary-color: #8b5cf6;
    --accent-color: #f97316;
    
    --bg-primary: #0a0f1a;
    --bg-secondary: #111827;
    --bg-tertiary: #1a2234;
    --bg-card: #1e293b;
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border-color: #334155;
    --border-light: #475569;
    
    /* Typography */
    --font-primary: 'Manrope', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --section-padding: 120px;
    --container-padding: 24px;
    
    /* Transitions */
    --transition-speed: 0.3s;
    --transition-ease: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

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

/* ========================================
   Container & Utilities
======================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

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

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 15, 26, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-speed) var(--transition-ease);
}

.nav.scrolled {
    background: rgba(10, 15, 26, 0.95);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 4px;
}

.logo-bracket {
    color: var(--primary-color);
}

.logo-text {
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    gap: 40px;
    align-items: center;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-speed) var(--transition-ease);
}

.nav-link:hover {
    color: var(--primary-color);
}

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

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

.nav-toggle span {
    width: 28px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-speed) var(--transition-ease);
}

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

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.grid-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(14, 165, 233, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(14, 165, 233, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.3;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.2;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    top: 10%;
    right: 10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--primary-color), transparent);
}

.orb-2 {
    bottom: 10%;
    left: 10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--secondary-color), transparent);
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0);
    }
    33% {
        transform: translate(30px, -30px);
    }
    66% {
        transform: translate(-20px, 20px);
    }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-greeting {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
}

.greeting-line {
    width: 40px;
    height: 2px;
    background: var(--primary-color);
}

.greeting-text {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.1rem;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.2s forwards;
}

.title-line {
    background: linear-gradient(135deg, var(--text-primary), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 1.8rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 8px;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.4s forwards;
}

.bracket {
    color: var(--primary-color);
}

.typing-text {
    color: var(--text-primary);
}

.cursor {
    color: var(--primary-color);
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.6s forwards;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.8s forwards;
}

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

/* Code Window */

.hero-image {
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 1s forwards;
}

.code-window {
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.window-header {
    background: var(--bg-secondary);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
}

.window-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.window-title {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.window-content {
    padding: 24px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.8;
    overflow-x: auto;
}

.code-keyword { color: #c792ea; }
.code-class { color: #82aaff; }
.code-string { color: #c3e88d; }
.code-method { color: #89ddff; }
.code-comment { color: #697098; font-style: italic; }

/* Scroll Indicator */

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    opacity: 0;
    animation: fadeIn 1s ease-out 1.5s forwards;
}

.scroll-text {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.scroll-arrow {
    width: 2px;
    height: 40px;
    background: linear-gradient(to bottom, var(--primary-color), transparent);
    animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
    0%, 100% { transform: translateY(0); opacity: 1; }
    50% { transform: translateY(10px); opacity: 0.5; }
}

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

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    border: 2px solid transparent;
    transition: all var(--transition-speed) var(--transition-ease);
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(14, 165, 233, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border-light);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

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

/* ========================================
   Section Styles
======================================== */

section {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-tag {
    font-family: var(--font-mono);
    color: var(--primary-color);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    display: inline-block;
}

.section-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

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

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

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
}

.about-paragraph {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.8;
}

.about-paragraph strong {
    color: var(--primary-color);
    font-weight: 600;
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 40px;
}

.highlight-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.highlight-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: 8px;
    flex-shrink: 0;
}

.highlight-icon svg {
    color: var(--primary-color);
}

.highlight-text h4 {
    font-size: 1.1rem;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.highlight-text p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.stat-card {
    background: var(--bg-tertiary);
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-speed) var(--transition-ease);
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(14, 165, 233, 0.2);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
}

/* ========================================
   Skills Section
======================================== */

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.skill-category {
    background: var(--bg-card);
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) var(--transition-ease);
}

.skill-category:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(14, 165, 233, 0.15);
}

.category-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-primary);
}

.category-title svg {
    color: var(--primary-color);
}

.skills-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.skill-item {
    opacity: 0;
    transform: translateX(-20px);
}

.skill-item.visible {
    animation: slideInLeft 0.6s ease-out forwards;
}

@keyframes slideInLeft {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.skill-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.skill-name {
    font-weight: 600;
    color: var(--text-primary);
}

.skill-level {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.skill-bar {
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 4px;
    width: 0;
    transition: width 1s ease-out;
}

/* ========================================
   Projects Section
======================================== */

.projects {
    background: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
    margin-bottom: 60px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    transition: all var(--transition-speed) var(--transition-ease);
    opacity: 0;
    transform: translateY(30px);
}

.project-card.visible {
    animation: fadeInUp 0.6s ease-out forwards;
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: 0 20px 40px rgba(14, 165, 233, 0.2);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
}

.project-icon {
    width: 64px;
    height: 64px;
    background: var(--bg-tertiary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-icon svg {
    color: var(--primary-color);
}

.project-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    background: rgba(14, 165, 233, 0.1);
    color: var(--primary-color);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    border: 1px solid rgba(14, 165, 233, 0.2);
}

.project-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.project-footer {
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-speed) var(--transition-ease);
}

.project-link:hover {
    gap: 12px;
}

.projects-cta {
    text-align: center;
}

/* ========================================
   Contact Section
======================================== */

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    transition: all var(--transition-speed) var(--transition-ease);
}

.contact-card:hover {
    border-color: var(--primary-color);
    transform: translateX(8px);
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon svg {
    color: var(--primary-color);
}

.contact-details h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.contact-details a,
.contact-details span {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-speed) var(--transition-ease);
}

.contact-details a:hover {
    color: var(--primary-color);
}

.contact-form-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px 16px;
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-speed) var(--transition-ease);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

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

.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-text {
    color: var(--text-secondary);
    line-height: 1.7;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 12px;
    transition: color var(--transition-speed) var(--transition-ease);
}

.footer-column a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

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

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

@media (max-width: 968px) {
    :root {
        --section-padding: 80px;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: flex-start;
        padding: 40px;
        gap: 24px;
        transition: left 0.3s var(--transition-ease);
        border-top: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-greeting {
        justify-content: center;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-subtitle {
        justify-content: center;
        font-size: 1.4rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-image {
        order: -1;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}