/* ============================================
   Portfolio Styles - Professional Dark Theme
   ============================================ */

:root {
  --primary: #3b82f6;
  --primary-light: #60a5fa;
  --primary-dark: #2563eb;
  --secondary: #8b5cf6;
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-card: #1e293b;
  --bg-hover: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;
  --border-color: #334155;
  --border-light: #475569;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -2px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4), 0 4px 6px -4px rgba(0,0,0,0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.5), 0 8px 10px -6px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 20px rgba(59,130,246,0.15);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --container-max: 1280px;
  --container-padding: 1.5rem;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { font-family: var(--font-sans); background: var(--bg-primary); color: var(--text-primary); line-height: 1.6; overflow-x: hidden; -webkit-font-smoothing: antialiased; }
a { color: var(--primary-light); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--container-padding); }

/* NAVIGATION */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(15,23,42,0.85); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border-color); transition: all var(--transition-base); }
.navbar.scrolled { background: rgba(15,23,42,0.95); box-shadow: var(--shadow-md); }
.nav-container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--container-padding); display: flex; align-items: center; justify-content: space-between; height: 70px; }
.nav-logo { font-family: var(--font-mono); font-size: 1.5rem; font-weight: 700; color: var(--text-primary); display: flex; align-items: center; gap: 2px; }
.logo-bracket { color: var(--primary); }
.logo-text { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav-menu { display: flex; align-items: center; list-style: none; gap: 0.5rem; }
.nav-link { color: var(--text-secondary); font-weight: 500; font-size: 0.95rem; padding: 0.5rem 1rem; border-radius: var(--radius-sm); transition: all var(--transition-fast); position: relative; }
.nav-link:hover, .nav-link.active { color: var(--text-primary); background: var(--bg-secondary); }
.nav-link.active::after { content: ''; position: absolute; bottom: -2px; left: 1rem; right: 1rem; height: 2px; background: linear-gradient(90deg, var(--primary), var(--secondary)); border-radius: 1px; }
.nav-icon { font-size: 1.2rem; padding: 0.5rem; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; z-index: 1001; }
.hamburger { display: block; width: 24px; height: 2px; background: var(--text-primary); position: relative; transition: all var(--transition-base); }
.hamburger::before, .hamburger::after { content: ''; position: absolute; width: 24px; height: 2px; background: var(--text-primary); transition: all var(--transition-base); }
.hamburger::before { top: -8px; }
.hamburger::after { top: 8px; }
.nav-toggle.active .hamburger { background: transparent; }
.nav-toggle.active .hamburger::before { top: 0; transform: rotate(45deg); }
.nav-toggle.active .hamburger::after { top: 0; transform: rotate(-45deg); }

/* BUTTONS */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.75rem 1.5rem; font-family: var(--font-sans); font-size: 0.95rem; font-weight: 600; border-radius: var(--radius-md); border: 2px solid transparent; cursor: pointer; transition: all var(--transition-fast); text-decoration: none; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: white; border-color: transparent; box-shadow: 0 4px 14px rgba(59,130,246,0.4); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(59,130,246,0.5); color: white; }
.btn-outline { background: transparent; color: var(--text-primary); border-color: var(--border-light); }
.btn-outline:hover { background: var(--bg-secondary); border-color: var(--primary); color: var(--primary-light); }
.btn-large { padding: 1rem 2rem; font-size: 1rem; }
.btn-full { width: 100%; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none !important; }

/* HERO */
.hero { min-height: 100vh; display: flex; align-items: center; position: relative; padding: 100px 0 60px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; overflow: hidden; }
.hero-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(59,130,246,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(59,130,246,0.03) 1px, transparent 1px); background-size: 60px 60px; mask-image: radial-gradient(ellipse at center, black 40%, transparent 70%); -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 70%); }
.hero-container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--container-padding); display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; position: relative; z-index: 1; width: 100%; }
.hero-badge { display: inline-flex; align-items: center; gap: 0.5rem; background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.3); color: var(--success); padding: 0.5rem 1rem; border-radius: 50px; font-size: 0.875rem; font-weight: 500; margin-bottom: 1.5rem; }
.badge-dot { width: 8px; height: 8px; background: var(--success); border-radius: 50%; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }
.hero-title { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 800; line-height: 1.1; margin-bottom: 1rem; letter-spacing: -0.02em; }
.text-gradient { background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-subtitle { font-size: clamp(1.25rem, 2.5vw, 1.75rem); font-weight: 600; color: var(--text-secondary); margin-bottom: 1.5rem; min-height: 2.5rem; }
.typing-cursor { color: var(--primary); animation: blink 1s infinite; }
@keyframes blink { 0%,50% { opacity: 1; } 51%,100% { opacity: 0; } }
.hero-description { font-size: 1.125rem; color: var(--text-muted); max-width: 500px; margin-bottom: 2rem; line-height: 1.7; }
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 2.5rem; }
.hero-social { display: flex; gap: 1rem; }
.social-link { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; border-radius: var(--radius-md); background: var(--bg-secondary); color: var(--text-secondary); font-size: 1.1rem; border: 1px solid var(--border-color); transition: all var(--transition-fast); }
.social-link:hover { background: var(--primary); color: white; border-color: var(--primary); transform: translateY(-3px); }

/* CODE WINDOW */
.hero-visual { display: flex; justify-content: center; align-items: center; }
.code-window { background: var(--bg-secondary); border-radius: var(--radius-lg); border: 1px solid var(--border-color); box-shadow: var(--shadow-xl), var(--shadow-glow); overflow: hidden; width: 100%; max-width: 500px; transform: perspective(1000px) rotateY(-5deg) rotateX(2deg); transition: transform var(--transition-slow); }
.code-window:hover { transform: perspective(1000px) rotateY(0deg) rotateX(0deg); }
.code-header { display: flex; align-items: center; gap: 0.5rem; padding: 0.75rem 1rem; background: rgba(0,0,0,0.3); border-bottom: 1px solid var(--border-color); }
.code-dot { width: 12px; height: 12px; border-radius: 50%; }
.code-dot.red { background: #ef4444; }
.code-dot.yellow { background: #f59e0b; }
.code-dot.green { background: #10b981; }
.code-filename { margin-left: auto; font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-muted); }
.code-body { padding: 1.25rem; overflow-x: auto; }
.code-body pre { margin: 0; font-family: var(--font-mono); font-size: 0.85rem; line-height: 1.8; }
.code-keyword { color: #c678dd; }
.code-variable { color: #e5c07b; }
.code-property { color: #e06c75; }
.code-string { color: #98c379; }
.code-function { color: #61afef; }
.code-boolean { color: #d19a66; }

/* SCROLL INDICATOR */
.scroll-indicator { position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 0.75rem; color: var(--text-muted); font-size: 0.8rem; animation: bounce 2s infinite; }
.mouse { width: 24px; height: 40px; border: 2px solid var(--text-muted); border-radius: 12px; position: relative; }
.wheel { width: 4px; height: 8px; background: var(--text-muted); border-radius: 2px; position: absolute; top: 8px; left: 50%; transform: translateX(-50%); animation: scrollWheel 2s infinite; }
@keyframes scrollWheel { 0% { top: 8px; opacity: 1; } 100% { top: 20px; opacity: 0; } }
@keyframes bounce { 0%,20%,50%,80%,100% { transform: translateX(-50%) translateY(0); } 40% { transform: translateX(-50%) translateY(-10px); } 60% { transform: translateX(-50%) translateY(-5px); } }

/* SECTIONS COMMON */
section { padding: 80px 0; }
.section-header { text-align: center; max-width: 600px; margin: 0 auto 4rem; }
.section-tag { display: inline-block; background: linear-gradient(135deg, rgba(59,130,246,0.1), rgba(139,92,246,0.1)); color: var(--primary-light); padding: 0.375rem 1rem; border-radius: 50px; font-size: 0.875rem; font-weight: 600; margin-bottom: 1rem; border: 1px solid rgba(59,130,246,0.2); }
.section-title { font-size: clamp(1.75rem, 3vw, 2.5rem); font-weight: 800; margin-bottom: 1rem; letter-spacing: -0.02em; }
.section-description { color: var(--text-muted); font-size: 1.1rem; }
.section-cta { text-align: center; margin-top: 3rem; }

/* STATS */
.stats-section { background: var(--bg-secondary); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); padding: 60px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
.stat-card { text-align: center; padding: 1.5rem; }
.stat-number { font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1; margin-bottom: 0.5rem; }
.stat-label { color: var(--text-muted); font-size: 0.9rem; font-weight: 500; }

/* SERVICES */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.5rem; }
.service-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 2rem; transition: all var(--transition-base); opacity: 0; animation: fadeInUp 0.6s ease forwards; animation-delay: var(--delay, 0s); }
.service-card:hover { transform: translateY(-5px); border-color: var(--primary); box-shadow: var(--shadow-lg), var(--shadow-glow); }
.service-icon { width: 56px; height: 56px; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, rgba(59,130,246,0.1), rgba(139,92,246,0.1)); border-radius: var(--radius-md); margin-bottom: 1.25rem; }
.service-icon i { font-size: 1.5rem; color: var(--primary); }
.service-title { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.75rem; }
.service-description { color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; }

/* PROJECTS */
.projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 2rem; }
.project-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg); overflow: hidden; transition: all var(--transition-base); opacity: 0; animation: fadeInUp 0.6s ease forwards; animation-delay: var(--delay, 0s); }
.project-card:hover { transform: translateY(-8px); border-color: var(--primary); box-shadow: var(--shadow-xl), var(--shadow-glow); }
.project-image { position: relative; overflow: hidden; aspect-ratio: 16/10; }
.project-image img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-slow); }
.project-card:hover .project-image img { transform: scale(1.05); }
.project-overlay { position: absolute; inset: 0; background: rgba(15,23,42,0.8); display: flex; align-items: center; justify-content: center; opacity: 0; transition: opacity var(--transition-base); }
.project-card:hover .project-overlay { opacity: 1; }
.project-links { display: flex; gap: 1rem; }
.project-link { width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; background: var(--primary); color: white; border-radius: 50%; font-size: 1.1rem; transform: translateY(20px); opacity: 0; transition: all var(--transition-base); }
.project-card:hover .project-link { transform: translateY(0); opacity: 1; }
.project-link:hover { background: var(--primary-light); transform: scale(1.1); }
.project-content { padding: 1.5rem; }
.project-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.75rem; }
.project-category { font-size: 0.8rem; color: var(--primary-light); font-weight: 600; }
.project-year { font-size: 0.8rem; color: var(--text-muted); }
.project-title { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.75rem; }
.project-title a { color: var(--text-primary); }
.project-title a:hover { color: var(--primary-light); }
.project-summary { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; margin-bottom: 1rem; }
.project-tech { display: flex; flex-wrap: wrap; gap: 0.5rem; }

/* TECH TAGS */
.tech-tag { display: inline-flex; align-items: center; padding: 0.375rem 0.75rem; background: rgba(59,130,246,0.1); color: var(--primary-light); border-radius: 50px; font-size: 0.8rem; font-weight: 500; border: 1px solid rgba(59,130,246,0.2); }
.tech-tag.small { padding: 0.25rem 0.5rem; font-size: 0.75rem; }

/* SKILLS PREVIEW */
.skills-preview { background: var(--bg-secondary); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }
.skills-showcase { overflow: hidden; }
.skill-marquee { overflow: hidden; mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent); }
.marquee-content { display: flex; gap: 2rem; animation: marquee 30s linear infinite; width: max-content; }
@keyframes marquee { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }
.skill-item { display: flex; align-items: center; gap: 1rem; background: var(--bg-card); padding: 0.75rem 1.5rem; border-radius: var(--radius-md); border: 1px solid var(--border-color); min-width: 200px; }
.skill-name { font-weight: 600; font-size: 0.9rem; white-space: nowrap; }
.skill-bar { width: 80px; height: 6px; background: var(--bg-tertiary); border-radius: 3px; overflow: hidden; }
.skill-progress { height: 100%; background: linear-gradient(90deg, var(--primary), var(--secondary)); border-radius: 3px; transition: width 1s ease; }

/* CTA */
.cta-section { background: linear-gradient(135deg, rgba(59,130,246,0.05), rgba(139,92,246,0.05)); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }
.cta-content { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-title { font-size: clamp(1.75rem, 3vw, 2.5rem); font-weight: 800; margin-bottom: 1rem; }
.cta-description { color: var(--text-muted); font-size: 1.1rem; margin-bottom: 2rem; }
.cta-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* FOOTER */
.footer { background: var(--bg-secondary); border-top: 1px solid var(--border-color); padding: 60px 0 0; }
.footer-container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--container-padding); }
.footer-content { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 3rem; padding-bottom: 3rem; border-bottom: 1px solid var(--border-color); }
.footer-logo { font-family: var(--font-mono); font-size: 1.5rem; font-weight: 700; margin-bottom: 1rem; display: inline-flex; }
.footer-tagline { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 1.5rem; line-height: 1.6; }
.footer-social { display: flex; gap: 0.75rem; }
.footer-social a { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; background: var(--bg-tertiary); color: var(--text-secondary); border-radius: var(--radius-md); transition: all var(--transition-fast); }
.footer-social a:hover { background: var(--primary); color: white; transform: translateY(-2px); }
.footer-links h4, .footer-contact h4 { font-size: 1rem; font-weight: 700; margin-bottom: 1.25rem; color: var(--text-primary); }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 0.75rem; }
.footer-links a { color: var(--text-muted); font-size: 0.9rem; transition: color var(--transition-fast); }
.footer-links a:hover { color: var(--primary-light); }
.footer-contact p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 0.75rem; display: flex; align-items: center; gap: 0.5rem; }
.footer-contact i { color: var(--primary); width: 20px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 1.5rem 0; flex-wrap: wrap; gap: 1rem; }
.footer-bottom p { color: var(--text-muted); font-size: 0.85rem; }
.footer-tech i { color: var(--error); }

/* PAGE HERO */
.page-hero { padding: 140px 0 80px; background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%); border-bottom: 1px solid var(--border-color); text-align: center; }
.page-hero-small { padding: 120px 0 60px; }
.page-tag { display: inline-block; background: linear-gradient(135deg, rgba(59,130,246,0.1), rgba(139,92,246,0.1)); color: var(--primary-light); padding: 0.375rem 1rem; border-radius: 50px; font-size: 0.875rem; font-weight: 600; margin-bottom: 1rem; border: 1px solid rgba(59,130,246,0.2); }
.page-title { font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; margin-bottom: 1rem; letter-spacing: -0.02em; }
.page-description { color: var(--text-muted); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }

/* ABOUT PAGE */
.about-section { padding: 80px 0; }
.about-grid { display: grid; grid-template-columns: 350px 1fr; gap: 4rem; align-items: start; }
.about-image { position: sticky; top: 100px; }
.image-frame { position: relative; border-radius: var(--radius-xl); overflow: hidden; }
.image-frame img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: var(--radius-xl); }
.image-decoration { position: absolute; inset: -10px; border: 2px solid var(--primary); border-radius: calc(var(--radius-xl) + 10px); z-index: -1; opacity: 0.3; }
.about-social { display: flex; justify-content: center; gap: 1rem; margin-top: 1.5rem; }
.about-social a { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; background: var(--bg-secondary); color: var(--text-secondary); border-radius: var(--radius-md); border: 1px solid var(--border-color); transition: all var(--transition-fast); }
.about-social a:hover { background: var(--primary); color: white; }
.about-content h2 { font-size: 2rem; font-weight: 800; margin-bottom: 1.5rem; }
.about-content p { color: var(--text-muted); margin-bottom: 1.25rem; line-height: 1.7; }
.about-content .lead { font-size: 1.125rem; color: var(--text-secondary); }
.about-interests { margin: 2rem 0; }
.about-interests h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 1rem; }
.interests-grid { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.interest-tag { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.5rem 1rem; background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: 50px; font-size: 0.875rem; color: var(--text-secondary); }
.interest-tag i { color: var(--warning); font-size: 0.75rem; }
.about-actions { display: flex; gap: 1rem; margin-top: 2rem; flex-wrap: wrap; }

/* EXPERIENCE TIMELINE */
.experience-section { background: var(--bg-secondary); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); padding: 80px 0; }
.timeline { position: relative; max-width: 900px; margin: 0 auto; }
.timeline::before { content: ''; position: absolute; left: 50%; transform: translateX(-50%); width: 2px; height: 100%; background: linear-gradient(180deg, var(--primary), var(--secondary)); }
.timeline-item { position: relative; width: 50%; padding: 0 2rem 3rem; }
.timeline-item.left { left: 0; text-align: right; }
.timeline-item.right { left: 50%; text-align: left; }
.timeline-item::before { content: ''; position: absolute; width: 16px; height: 16px; background: var(--primary); border: 3px solid var(--bg-primary); border-radius: 50%; top: 0; }
.timeline-item.left::before { right: -8px; }
.timeline-item.right::before { left: -8px; }
.timeline-content { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 1.5rem; }
.timeline-period { display: inline-block; background: rgba(59,130,246,0.1); color: var(--primary-light); padding: 0.25rem 0.75rem; border-radius: 50px; font-size: 0.8rem; font-weight: 600; margin-bottom: 0.75rem; }
.timeline-role { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.5rem; }
.timeline-company { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 1rem; display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; }
.timeline-company i { color: var(--primary); }
.timeline-location i { color: var(--secondary); }
.timeline-description { color: var(--text-muted); margin-bottom: 1rem; line-height: 1.6; }
.timeline-achievements { list-style: none; margin-bottom: 1rem; }
.timeline-achievements li { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 0.5rem; display: flex; align-items: flex-start; gap: 0.5rem; }
.timeline-achievements i { color: var(--success); margin-top: 0.25rem; flex-shrink: 0; }
.timeline-tech { display: flex; flex-wrap: wrap; gap: 0.5rem; }

/* EDUCATION */
.education-section { padding: 80px 0; }
.education-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; max-width: 600px; margin: 0 auto; }
.education-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 2rem; display: flex; gap: 1.5rem; align-items: flex-start; }
.education-icon { width: 56px; height: 56px; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, rgba(59,130,246,0.1), rgba(139,92,246,0.1)); border-radius: var(--radius-md); flex-shrink: 0; }
.education-icon i { font-size: 1.5rem; color: var(--primary); }
.education-content h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.5rem; }
.education-institution { color: var(--text-muted); margin-bottom: 0.75rem; }
.education-meta { display: flex; gap: 1rem; margin-bottom: 0.75rem; }
.education-meta span { font-size: 0.85rem; color: var(--text-muted); display: flex; align-items: center; gap: 0.25rem; }
.education-meta i { color: var(--primary); }
.education-honors { display: inline-flex; align-items: center; gap: 0.5rem; background: rgba(245,158,11,0.1); color: var(--warning); padding: 0.375rem 0.75rem; border-radius: 50px; font-size: 0.8rem; font-weight: 600; }

/* SKILLS */
.skills-section { background: var(--bg-secondary); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); padding: 80px 0; }
.skills-tabs { display: flex; gap: 0.5rem; margin-bottom: 2rem; flex-wrap: wrap; justify-content: center; }
.skill-tab { padding: 0.625rem 1.25rem; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-md); color: var(--text-muted); font-family: var(--font-sans); font-size: 0.9rem; font-weight: 600; cursor: pointer; transition: all var(--transition-fast); }
.skill-tab:hover { border-color: var(--primary); color: var(--text-primary); }
.skill-tab.active { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: white; border-color: transparent; }
.skills-content { max-width: 800px; margin: 0 auto; }
.skill-panel { display: none; }
.skill-panel.active { display: block; animation: fadeIn 0.3s ease; }
.skill-grid { display: grid; gap: 1.25rem; }
.skill-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 1.25rem; }
.skill-info { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.75rem; }
.skill-name { font-weight: 600; }
.skill-percent { color: var(--primary-light); font-weight: 700; font-family: var(--font-mono); }
.skill-bar { height: 8px; background: var(--bg-tertiary); border-radius: 4px; overflow: hidden; }
.skill-progress { height: 100%; background: linear-gradient(90deg, var(--primary), var(--secondary)); border-radius: 4px; transition: width 1s ease; }
.tools-section { margin-top: 3rem; text-align: center; }
.tools-section h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 1.5rem; }
.tools-grid { display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: center; }
.tool-tag { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.5rem 1rem; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 50px; font-size: 0.875rem; color: var(--text-secondary); transition: all var(--transition-fast); }
.tool-tag:hover { border-color: var(--primary); color: var(--primary-light); }
.tool-tag i { color: var(--text-muted); font-size: 0.75rem; }

/* TESTIMONIALS */
.testimonials-section { padding: 80px 0; }
.testimonials-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 2rem; max-width: 900px; margin: 0 auto; }
.testimonial-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 2rem; }
.testimonial-content { position: relative; margin-bottom: 1.5rem; }
.quote-icon { font-size: 2rem; color: var(--primary); opacity: 0.3; margin-bottom: 0.5rem; display: block; }
.testimonial-content p { color: var(--text-secondary); font-style: italic; line-height: 1.7; }
.testimonial-author { display: flex; align-items: center; gap: 1rem; }
.testimonial-author img { width: 48px; height: 48px; border-radius: 50%; object-fit: cover; border: 2px solid var(--border-color); }
.author-info h4 { font-size: 1rem; font-weight: 700; }
.author-info span { color: var(--text-muted); font-size: 0.85rem; }

/* PROJECTS LIST */
.projects-list-section { padding: 60px 0 80px; }
.filter-tabs { display: flex; gap: 0.5rem; margin-bottom: 3rem; flex-wrap: wrap; justify-content: center; }
.filter-btn { padding: 0.625rem 1.25rem; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 50px; color: var(--text-muted); font-family: var(--font-sans); font-size: 0.9rem; font-weight: 600; cursor: pointer; transition: all var(--transition-fast); }
.filter-btn:hover { border-color: var(--primary); color: var(--text-primary); }
.filter-btn.active { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: white; border-color: transparent; }
.projects-list-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 2rem; }
.project-list-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg); overflow: hidden; transition: all var(--transition-base); opacity: 0; animation: fadeInUp 0.6s ease forwards; animation-delay: var(--delay, 0s); }
.project-list-card:hover { transform: translateY(-5px); border-color: var(--primary); box-shadow: var(--shadow-lg); }
.project-list-image { position: relative; overflow: hidden; aspect-ratio: 16/10; }
.project-list-image img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-slow); }
.project-list-card:hover .project-list-image img { transform: scale(1.05); }
.project-list-overlay { position: absolute; inset: 0; background: rgba(15,23,42,0.8); display: flex; align-items: center; justify-content: center; opacity: 0; transition: opacity var(--transition-base); }
.project-list-card:hover .project-list-overlay { opacity: 1; }
.project-list-links { display: flex; gap: 0.75rem; }
.project-list-link { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; background: var(--primary); color: white; border-radius: 50%; font-size: 1rem; transform: translateY(15px); opacity: 0; transition: all var(--transition-base); }
.project-list-card:hover .project-list-link { transform: translateY(0); opacity: 1; }
.project-list-link:nth-child(2) { transition-delay: 0.05s; }
.project-list-link:nth-child(3) { transition-delay: 0.1s; }
.project-list-link:hover { background: var(--primary-light); }
.project-badge { position: absolute; top: 1rem; right: 1rem; background: linear-gradient(135deg, var(--primary), var(--secondary)); color: white; padding: 0.25rem 0.75rem; border-radius: 50px; font-size: 0.75rem; font-weight: 600; }
.project-list-content { padding: 1.5rem; }
.project-list-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.75rem; }
.project-list-category { font-size: 0.8rem; color: var(--primary-light); font-weight: 600; }
.project-list-year { font-size: 0.8rem; color: var(--text-muted); }
.project-list-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 0.75rem; }
.project-list-title a { color: var(--text-primary); }
.project-list-title a:hover { color: var(--primary-light); }
.project-list-summary { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; margin-bottom: 1rem; }
.project-list-tech { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
.project-list-cta { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--primary-light); font-weight: 600; font-size: 0.9rem; transition: gap var(--transition-fast); }
.project-list-cta:hover { gap: 0.75rem; }

/* PROJECT DETAIL */
.breadcrumb { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1.5rem; font-size: 0.9rem; color: var(--text-muted); justify-content: center; }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary-light); }
.breadcrumb i { font-size: 0.7rem; }
.project-detail-section { padding: 60px 0; }
.project-detail-grid { display: grid; grid-template-columns: 1fr 350px; gap: 3rem; align-items: start; }
.project-detail-image { border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 2rem; border: 1px solid var(--border-color); }
.project-detail-image img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.project-detail-description { margin-bottom: 2rem; }
.project-detail-description h2, .project-detail-features h2, .project-detail-gallery h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 1rem; }
.project-detail-description p { color: var(--text-muted); line-height: 1.7; }
.project-detail-features { margin-bottom: 2rem; }
.project-detail-features ul { list-style: none; display: grid; gap: 0.75rem; }
.project-detail-features li { display: flex; align-items: center; gap: 0.75rem; color: var(--text-secondary); padding: 0.75rem 1rem; background: var(--bg-secondary); border-radius: var(--radius-md); border: 1px solid var(--border-color); }
.project-detail-features i { color: var(--success); }
.project-detail-gallery { margin-bottom: 2rem; }
.gallery-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1rem; }
.gallery-item { border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--border-color); }
.gallery-item img { width: 100%; aspect-ratio: 16/10; object-fit: cover; transition: transform var(--transition-base); }
.gallery-item:hover img { transform: scale(1.05); }
.project-detail-sidebar { position: sticky; top: 100px; }
.sidebar-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 1.5rem; margin-bottom: 1.5rem; }
.sidebar-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 1.25rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--border-color); }
.sidebar-info { display: grid; gap: 1rem; }
.sidebar-item { display: flex; justify-content: space-between; align-items: center; }
.sidebar-label { display: flex; align-items: center; gap: 0.5rem; color: var(--text-muted); font-size: 0.9rem; }
.sidebar-label i { color: var(--primary); width: 20px; }
.sidebar-value { font-weight: 600; font-size: 0.9rem; }
.status-badge { display: inline-block; padding: 0.25rem 0.75rem; border-radius: 50px; font-size: 0.8rem; font-weight: 600; }
.status-badge.completed { background: rgba(16,185,129,0.1); color: var(--success); }
.sidebar-tech { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.sidebar-actions { display: grid; gap: 0.75rem; }
.project-nav { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--border-color); }
.project-nav-back { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--text-muted); font-weight: 600; transition: color var(--transition-fast); }
.project-nav-back:hover { color: var(--primary-light); }
.related-projects { background: var(--bg-secondary); border-top: 1px solid var(--border-color); padding: 60px 0 80px; }
.related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
.related-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg); overflow: hidden; transition: all var(--transition-base); }
.related-card:hover { border-color: var(--primary); transform: translateY(-3px); }
.related-image { overflow: hidden; aspect-ratio: 16/10; }
.related-image img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-base); }
.related-card:hover .related-image img { transform: scale(1.05); }
.related-content { padding: 1.25rem; }
.related-category { font-size: 0.8rem; color: var(--primary-light); font-weight: 600; margin-bottom: 0.5rem; display: block; }
.related-content h3 { font-size: 1.1rem; font-weight: 700; }
.related-content h3 a { color: var(--text-primary); }
.related-content h3 a:hover { color: var(--primary-light); }

/* CONTACT */
.contact-section { padding: 60px 0 80px; }
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 4rem; align-items: start; }
.contact-info h2 { font-size: 2rem; font-weight: 800; margin-bottom: 1rem; }
.contact-info > p { color: var(--text-muted); margin-bottom: 2rem; line-height: 1.7; }
.contact-details { display: grid; gap: 1.5rem; margin-bottom: 2rem; }
.contact-item { display: flex; align-items: flex-start; gap: 1rem; }
.contact-icon { width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, rgba(59,130,246,0.1), rgba(139,92,246,0.1)); border-radius: var(--radius-md); flex-shrink: 0; }
.contact-icon i { font-size: 1.25rem; color: var(--primary); }
.contact-detail h4 { font-size: 1rem; font-weight: 700; margin-bottom: 0.25rem; }
.contact-detail a, .contact-detail span { color: var(--text-muted); font-size: 0.95rem; }
.contact-detail a:hover { color: var(--primary-light); }
.contact-social { margin-bottom: 2rem; }
.contact-social h4 { font-size: 1.1rem; font-weight: 700; margin-bottom: 1rem; }
.social-links { display: flex; gap: 0.75rem; }
.social-links a { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; background: var(--bg-secondary); color: var(--text-secondary); border-radius: var(--radius-md); border: 1px solid var(--border-color); transition: all var(--transition-fast); }
.social-links a:hover { background: var(--primary); color: white; border-color: var(--primary); }
.contact-availability { display: inline-block; }
.availability-badge { display: inline-flex; align-items: center; gap: 0.5rem; background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.3); color: var(--success); padding: 0.625rem 1.25rem; border-radius: 50px; font-size: 0.9rem; font-weight: 600; }
.availability-dot { width: 8px; height: 8px; background: var(--success); border-radius: 50%; animation: pulse 2s infinite; }
.contact-form-wrapper { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-xl); padding: 2.5rem; }
.contact-form h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 1.5rem; }
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 0.5rem; color: var(--text-secondary); }
.required { color: var(--error); }
.form-group input, .form-group textarea { width: 100%; padding: 0.875rem 1rem; background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: var(--radius-md); color: var(--text-primary); font-family: var(--font-sans); font-size: 0.95rem; transition: all var(--transition-fast); }
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(59,130,246,0.1); }
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-muted); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group.error input, .form-group.error textarea { border-color: var(--error); }
.form-error { display: block; color: var(--error); font-size: 0.8rem; margin-top: 0.375rem; }
.form-message { margin-top: 1rem; padding: 1rem; border-radius: var(--radius-md); font-size: 0.9rem; display: none; }
.form-message.success { display: block; background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.3); color: var(--success); }
.form-message.error { display: block; background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); color: var(--error); }
.form-message i { margin-right: 0.5rem; }

/* ERROR PAGES */
.error-section { min-height: 80vh; display: flex; align-items: center; justify-content: center; padding: 120px 0; }
.error-content { text-align: center; }
.error-code { display: flex; align-items: center; justify-content: center; gap: 1rem; margin-bottom: 2rem; }
.error-digit { font-size: clamp(4rem, 10vw, 8rem); font-weight: 800; background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1; }
.error-icon { font-size: clamp(3rem, 6vw, 5rem); color: var(--primary); opacity: 0.5; animation: float 3s ease-in-out infinite; }
.error-icon-server { animation: none; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-15px); } }
.error-title { font-size: clamp(1.5rem, 3vw, 2.5rem); font-weight: 800; margin-bottom: 1rem; }
.error-description { color: var(--text-muted); font-size: 1.1rem; margin-bottom: 2rem; max-width: 400px; margin-left: auto; margin-right: auto; }
.error-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-bottom: 2rem; }
.error-path { color: var(--text-muted); font-size: 0.85rem; }
.error-path code { background: var(--bg-secondary); padding: 0.5rem 1rem; border-radius: var(--radius-md); border: 1px solid var(--border-color); font-family: var(--font-mono); }

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

/* RESPONSIVE */
@media (max-width: 1024px) {
  .hero-container { grid-template-columns: 1fr; text-align: center; }
  .hero-description { margin-left: auto; margin-right: auto; }
  .hero-cta { justify-content: center; }
  .hero-social { justify-content: center; }
  .hero-visual { order: -1; }
  .code-window { transform: none; max-width: 100%; }
  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .about-image { position: static; max-width: 300px; margin: 0 auto; }
  .project-detail-grid { grid-template-columns: 1fr; }
  .project-detail-sidebar { position: static; }
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
  .timeline::before { left: 20px; }
  .timeline-item { width: 100%; padding-left: 50px; padding-right: 0; text-align: left !important; }
  .timeline-item.left, .timeline-item.right { left: 0; }
  .timeline-item.left::before, .timeline-item.right::before { left: 12px; right: auto; }
  .footer-content { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --container-padding: 1rem; }
  .nav-toggle { display: block; }
  .nav-menu { position: fixed; top: 0; right: -100%; width: 280px; height: 100vh; background: var(--bg-secondary); flex-direction: column; padding: 80px 2rem 2rem; gap: 0.5rem; transition: right var(--transition-base); border-left: 1px solid var(--border-color); z-index: 999; }
  .nav-menu.active { right: 0; }
  .nav-link { width: 100%; padding: 0.875rem 1rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
  .projects-grid, .projects-list-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .footer-content { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .skills-tabs { justify-content: flex-start; overflow-x: auto; padding-bottom: 0.5rem; -webkit-overflow-scrolling: touch; }
  .skill-tab { white-space: nowrap; }
  .filter-tabs { justify-content: flex-start; overflow-x: auto; padding-bottom: 0.5rem; -webkit-overflow-scrolling: touch; }
  .filter-btn { white-space: nowrap; }
  .contact-form-wrapper { padding: 1.5rem; }
  .hero-cta { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .cta-buttons { flex-direction: column; }
  .about-actions { flex-direction: column; }
  .error-actions { flex-direction: column; }
}

@media (max-width: 480px) {
  .hero { padding: 100px 0 40px; }
  .hero-title { font-size: 2rem; }
  .section-header { margin-bottom: 2.5rem; }
  section { padding: 60px 0; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .stat-card { padding: 1rem; }
  .stat-number { font-size: 1.75rem; }
  .code-body pre { font-size: 0.7rem; }
  .education-card { flex-direction: column; text-align: center; }
  .education-meta { justify-content: center; }
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--bg-tertiary); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }
::selection { background: rgba(59,130,246,0.3); color: var(--text-primary); }