:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-card: #151515;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-muted: #666666;
    --purple-primary: #9333ea;
    --purple-light: #a855f7;
    --purple-dark: #7c3aed;
    --purple-glow: rgba(147, 51, 234, 0.5);
    --purple-subtle: rgba(147, 51, 234, 0.1);
    --gradient-purple: linear-gradient(135deg, #9333ea 0%, #7c3aed 50%, #6366f1 100%);
    --font-primary: 'Inter', sans-serif;
    --font-mono: 'Fira Code', monospace;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { font-family: var(--font-primary); background-color: var(--bg-primary); color: var(--text-primary); line-height: 1.6; overflow-x: hidden; }
a { text-decoration: none; color: inherit; transition: color var(--transition-fast); }
ul { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.highlight { color: var(--purple-light); font-weight: 500; }
.section { padding: 100px 0; position: relative; }
.section-title { font-size: clamp(2rem, 5vw, 2.5rem); font-weight: 700; text-align: center; margin-bottom: 60px; position: relative; display: inline-block; width: 100%; }
.section-title::after { content: ''; position: absolute; bottom: -12px; left: 50%; transform: translateX(-50%); width: 60px; height: 4px; background: var(--gradient-purple); border-radius: 2px; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 28px; font-size: 1rem; font-weight: 500; border-radius: var(--radius-md); cursor: pointer; transition: all var(--transition-normal); border: none; font-family: var(--font-primary); }
.btn-primary { background: var(--gradient-purple); color: var(--text-primary); box-shadow: 0 4px 20px var(--purple-glow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px var(--purple-glow); }
.btn-secondary { background: transparent; color: var(--purple-light); border: 2px solid var(--purple-primary); }
.btn-secondary:hover { background: var(--purple-subtle); transform: translateY(-2px); }

.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 16px 0; transition: all var(--transition-normal); background: transparent; }
.navbar.scrolled { background: rgba(10, 10, 10, 0.95); backdrop-filter: blur(20px); box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3); padding: 12px 0; }
.nav-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: flex; justify-content: center; align-items: center; }
.nav-menu { display: flex; gap: 32px; }
.nav-link { font-size: 0.95rem; font-weight: 500; color: var(--text-secondary); position: relative; padding: 8px 0; }
.nav-link::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--gradient-purple); transition: width var(--transition-normal); }
.nav-link:hover, .nav-link.active { color: var(--text-primary); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-toggle { display: none; flex-direction: column; gap: 6px; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text-primary); transition: all var(--transition-normal); }

.hero { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; align-items: center; padding: 120px 24px 60px; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; background: radial-gradient(circle at 30% 30%, var(--purple-subtle) 0%, transparent 50%); animation: float 20s ease-in-out infinite; }
@keyframes float { 0%, 100% { transform: translate(0, 0) rotate(0deg); } 50% { transform: translate(30px, 30px) rotate(180deg); } }
.hero-content { max-width: 1200px; width: 100%; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; position: relative; z-index: 1; }
.hero-text { animation: fadeInUp 0.8s ease; }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
.hero-greeting { font-size: 1.1rem; color: var(--purple-light); font-weight: 500; margin-bottom: 8px; }
.hero-name { font-size: clamp(2.5rem, 6vw, 4rem); font-weight: 700; line-height: 1.1; margin-bottom: 16px; background: linear-gradient(135deg, #a855f7, #9333ea, #7c3aed); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-title-wrapper { font-size: clamp(1.2rem, 3vw, 1.5rem); color: var(--text-secondary); margin-bottom: 24px; display: flex; align-items: center; gap: 8px; }
.hero-title { color: var(--text-primary); font-weight: 600; }
.cursor { color: var(--purple-light); animation: blink 1s infinite; }
@keyframes blink { 0%, 50% { opacity: 1; } 51%, 100% { opacity: 0; } }
.hero-description { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 32px; max-width: 500px; line-height: 1.8; }
.hero-buttons { display: flex; gap: 16px; margin-bottom: 40px; flex-wrap: wrap; }
.hero-social { display: flex; gap: 16px; }
.social-link { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; border-radius: 50%; background: var(--bg-tertiary); color: var(--text-secondary); transition: all var(--transition-normal); }
.social-link:hover { background: var(--purple-primary); color: var(--text-primary); transform: translateY(-4px); box-shadow: 0 8px 20px var(--purple-glow); }

.hero-visual { animation: fadeInUp 0.8s ease 0.2s both; }
.code-window { background: var(--bg-secondary); border-radius: var(--radius-lg); overflow: hidden; box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5); border: 1px solid var(--bg-tertiary); }
.code-header { display: flex; align-items: center; gap: 8px; padding: 12px 16px; background: var(--bg-tertiary); border-bottom: 1px solid rgba(255, 255, 255, 0.05); }
.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27ca40; }
.filename { margin-left: auto; font-size: 0.85rem; color: var(--text-muted); font-family: var(--font-mono); }
.code-content { padding: 24px; font-family: var(--font-mono); font-size: 0.9rem; line-height: 1.8; overflow-x: auto; }
.code-content code { display: block; }
.keyword { color: #c678dd; }
.class-name { color: #e5c07b; }
.function { color: #61afef; }
.param { color: #e06c75; }
.string { color: #98c379; }
.number { color: #d19a66; }

.scroll-indicator { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 12px; color: var(--text-muted); font-size: 0.85rem; animation: bounce 2s infinite; }
@keyframes bounce { 0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); } 40% { transform: translateX(-50%) translateY(-10px); } 60% { transform: translateX(-50%) translateY(-5px); } }
.mouse { width: 24px; height: 40px; border: 2px solid var(--text-muted); border-radius: 12px; position: relative; }
.wheel { width: 4px; height: 8px; background: var(--purple-light); border-radius: 2px; position: absolute; top: 8px; left: 50%; transform: translateX(-50%); animation: scroll 2s infinite; }
@keyframes scroll { 0% { opacity: 1; top: 8px; } 100% { opacity: 0; top: 20px; } }

.about { background: var(--bg-secondary); }
.about-content-centered { max-width: 800px; margin: 0 auto; text-align: center; }
.about-description { font-size: 1.2rem; color: var(--text-secondary); line-height: 2; }

.timeline { position: relative; max-width: 900px; margin: 0 auto; }
.timeline::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: linear-gradient(to bottom, var(--purple-primary), var(--purple-dark)); }
.timeline-item { position: relative; padding-left: 40px; margin-bottom: 50px; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-marker { position: absolute; left: -7px; top: 0; width: 16px; height: 16px; background: var(--bg-primary); border: 3px solid var(--purple-primary); border-radius: 50%; transition: all var(--transition-normal); }
.timeline-item:hover .timeline-marker { background: var(--purple-primary); box-shadow: 0 0 20px var(--purple-glow); }
.timeline-content { background: var(--bg-card); padding: 30px; border-radius: var(--radius-lg); border: 1px solid var(--bg-tertiary); transition: all var(--transition-normal); }
.timeline-content:hover { border-color: var(--purple-primary); transform: translateX(8px); }
.timeline-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 8px; flex-wrap: wrap; gap: 12px; }
.timeline-header h3 { font-size: 1.25rem; color: var(--text-primary); }
.timeline-date { font-size: 0.9rem; color: var(--purple-light); font-weight: 500; padding: 4px 12px; background: var(--purple-subtle); border-radius: var(--radius-sm); }
.timeline-company { color: var(--text-muted); margin-bottom: 16px; font-size: 0.95rem; }
.timeline-list { margin-bottom: 20px; }
.timeline-list li { position: relative; padding-left: 20px; margin-bottom: 10px; color: var(--text-secondary); font-size: 0.95rem; line-height: 1.6; }
.timeline-list li::before { content: '>'; position: absolute; left: 0; color: var(--purple-light); }
.timeline-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { font-size: 0.8rem; padding: 4px 12px; background: var(--bg-tertiary); color: var(--text-secondary); border-radius: var(--radius-sm); transition: all var(--transition-fast); }
.tag:hover { background: var(--purple-subtle); color: var(--purple-light); }

.projects { background: var(--bg-secondary); }
.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.project-card { background: var(--bg-card); border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--bg-tertiary); transition: all var(--transition-normal); }
.project-card:hover { border-color: var(--purple-primary); transform: translateY(-8px); box-shadow: 0 20px 40px rgba(147, 51, 234, 0.15); }
.project-image { height: 200px; overflow: hidden; }
.project-placeholder { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; color: var(--purple-light); font-size: 4rem; transition: all var(--transition-normal); }
.ar-project { background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%); }
.bank-project { background: linear-gradient(135deg, #1a1a1a 0%, #2d1f3d 100%); }
.inventory-project { background: linear-gradient(135deg, #0f0f1a 0%, #1a0f2e 100%); }
.recipe-project { background: linear-gradient(135deg, #1a2e1a 0%, #2d3d1f 100%); }
.project-card:hover .project-placeholder { transform: scale(1.1); }
.project-content { padding: 24px; }
.project-year { font-size: 0.85rem; color: var(--purple-light); font-weight: 500; margin-bottom: 8px; }
.project-content h3 { font-size: 1.25rem; margin-bottom: 12px; color: var(--text-primary); }
.project-content p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.6; margin-bottom: 16px; }
.project-tech { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.project-tech span { font-size: 0.8rem; padding: 4px 10px; background: var(--purple-subtle); color: var(--purple-light); border-radius: var(--radius-sm); font-family: var(--font-mono); }
.project-github-btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; background: var(--bg-tertiary); color: var(--text-secondary); border-radius: var(--radius-md); font-size: 0.9rem; font-weight: 500; transition: all var(--transition-normal); }
.project-github-btn:hover { background: var(--purple-primary); color: var(--text-primary); transform: translateY(-2px); box-shadow: 0 4px 15px var(--purple-glow); }

.skills-container { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }
.skill-category { background: var(--bg-card); padding: 30px; border-radius: var(--radius-lg); border: 1px solid var(--bg-tertiary); transition: all var(--transition-normal); }
.skill-category:hover { border-color: var(--purple-primary); }
.skill-category h3 { display: flex; align-items: center; gap: 12px; font-size: 1.1rem; margin-bottom: 24px; color: var(--text-primary); }
.skill-items { display: flex; flex-direction: column; gap: 20px; }
.skill-item { display: flex; flex-direction: column; gap: 8px; }
.skill-name { font-size: 0.95rem; color: var(--text-secondary); }
.skill-bar { height: 8px; background: var(--bg-tertiary); border-radius: 4px; overflow: hidden; }
.skill-progress { height: 100%; background: var(--gradient-purple); border-radius: 4px; width: 0; transition: width 1s ease; }
.skill-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.skill-tag { padding: 8px 16px; background: var(--bg-tertiary); color: var(--text-secondary); border-radius: var(--radius-md); font-size: 0.9rem; transition: all var(--transition-fast); }
.skill-tag:hover { background: var(--purple-subtle); color: var(--purple-light); transform: translateY(-2px); }
.skill-list { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.skill-list li { position: relative; padding-left: 24px; color: var(--text-secondary); font-size: 0.95rem; line-height: 1.6; transition: color var(--transition-fast); }
.skill-list li::before { content: '>'; position: absolute; left: 0; color: var(--purple-light); font-weight: 600; }
.skill-list li:hover { color: var(--text-primary); }

.contact { background: var(--bg-secondary); }
.contact-content-centered { max-width: 600px; margin: 0 auto; }
.contact-methods-centered { display: flex; justify-content: center; gap: 40px; }
.contact-method-card { display: flex; flex-direction: column; align-items: center; gap: 16px; padding: 40px; background: var(--bg-card); border-radius: var(--radius-lg); border: 1px solid var(--bg-tertiary); transition: all var(--transition-normal); width: 250px; text-align: center; }
.contact-method-card:hover { border-color: var(--purple-primary); transform: translateY(-8px); box-shadow: 0 20px 40px rgba(147, 51, 234, 0.15); }
.contact-icon-large { width: 70px; height: 70px; display: flex; align-items: center; justify-content: center; background: var(--purple-subtle); border-radius: 50%; color: var(--purple-light); }
.contact-label { font-size: 0.85rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.contact-value { font-size: 1rem; color: var(--text-primary); }

.footer { padding: 40px 0; background: var(--bg-primary); border-top: 1px solid var(--bg-tertiary); }
.footer-content { text-align: center; }
.footer-text { color: var(--text-secondary); margin-bottom: 8px; }
.footer-copyright { color: var(--text-muted); font-size: 0.9rem; }

.back-to-top { position: fixed; bottom: 30px; right: 30px; width: 50px; height: 50px; display: flex; align-items: center; justify-content: center; background: var(--gradient-purple); border: none; border-radius: 50%; color: var(--text-primary); cursor: pointer; opacity: 0; visibility: hidden; transition: all var(--transition-normal); box-shadow: 0 4px 20px var(--purple-glow); z-index: 999; font-size: 0.8rem; }
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-4px); box-shadow: 0 8px 30px var(--purple-glow); }

@media (max-width: 1024px) {
    .hero-content { grid-template-columns: 1fr; text-align: center; }
    .hero-text { order: 1; }
    .hero-visual { order: 2; max-width: 500px; margin: 0 auto; }
    .hero-description { margin: 0 auto 32px; }
    .hero-buttons { justify-content: center; }
    .hero-social { justify-content: center; }
    .contact-methods-centered { flex-direction: column; align-items: center; gap: 20px; }
    .skills-container { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-menu { position: fixed; top: 0; right: -100%; width: 70%; max-width: 300px; height: 100vh; background: var(--bg-secondary); flex-direction: column; padding: 100px 40px 40px; gap: 24px; transition: right var(--transition-normal); box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5); }
    .nav-menu.active { right: 0; }
    .nav-toggle { display: flex; z-index: 1001; }
    .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
    .nav-toggle.active span:nth-child(2) { opacity: 0; }
    .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }
    .hero { padding: 100px 20px 40px; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .btn { width: 100%; max-width: 250px; }
    .about-stats { flex-direction: column; gap: 24px; }
    .timeline::before { left: 8px; }
    .timeline-item { padding-left: 32px; }
    .timeline-marker { left: 1px; }
    .timeline-header { flex-direction: column; }
    .projects-grid { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto; }
    .scroll-indicator { display: none; }
}

@media (max-width: 480px) {
    .section { padding: 60px 0; }
    .section-title { margin-bottom: 40px; }
    .code-window { font-size: 0.8rem; }
    .code-content { padding: 16px; }
    .timeline-content { padding: 20px; }
    .project-content { padding: 20px; }
    .skill-category { padding: 20px; }
    .contact-method { padding: 16px; }
}