:root,:root.light-theme,[data-theme=light]{--text-primary: #333333;--text-secondary: #666666;--text-muted: #999999;--text-inverse: #ffffff;--bg-primary: #ffffff;--bg-secondary: #f8f9fa;--bg-tertiary: #e9ecef;--bg-header: rgba(255, 255, 255, .95);--bg-card: #ffffff;--bg-overlay: rgba(0, 0, 0, .1);--accent-primary: #667eea;--accent-secondary: #764ba2;--gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--gradient-secondary: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);--gradient-tertiary: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);--border-color: #e0e6ed;--border-light: #f1f3f4;--shadow-color: rgba(0, 0, 0, .1);--shadow-header: 0 2px 10px rgba(0, 0, 0, .1);--shadow-card: 0 4px 20px rgba(0, 0, 0, .1);--shadow-hover: 0 8px 30px rgba(0, 0, 0, .15);--success-color: #28a745;--warning-color: #ffc107;--danger-color: #dc3545;--info-color: #17a2b8}:root.dark-theme,[data-theme=dark]{--text-primary: #e2e8f0;--text-secondary: #cbd5e0;--text-muted: #a0aec0;--text-inverse: #1a202c;--bg-primary: #1a202c;--bg-secondary: #2d3748;--bg-tertiary: #4a5568;--bg-header: rgba(26, 32, 44, .95);--bg-card: #2d3748;--bg-overlay: rgba(255, 255, 255, .1);--accent-primary: #818cf8;--accent-secondary: #a78bfa;--gradient-primary: linear-gradient(135deg, #818cf8 0%, #a78bfa 100%);--gradient-secondary: linear-gradient(135deg, #60a5fa 0%, #34d399 100%);--gradient-tertiary: linear-gradient(135deg, #f472b6 0%, #fb7185 100%);--border-color: #4a5568;--border-light: #2d3748;--shadow-color: rgba(0, 0, 0, .3);--shadow-header: 0 2px 20px rgba(0, 0, 0, .3);--shadow-card: 0 4px 25px rgba(0, 0, 0, .2);--shadow-hover: 0 8px 40px rgba(0, 0, 0, .3);--success-color: #48bb78;--warning-color: #ed8936;--danger-color: #f56565;--info-color: #4299e1}*{transition:background-color .3s ease,color .3s ease,border-color .3s ease,box-shadow .3s ease}.light-theme .skill-bar,[data-theme=light] .skill-bar{background:var(--bg-tertiary)}.light-theme .project-card,[data-theme=light] .project-card{background:var(--bg-card);border:1px solid var(--border-color)}.light-theme .contact-item,[data-theme=light] .contact-item{background:var(--bg-secondary)}.dark-theme .skill-bar,[data-theme=dark] .skill-bar{background:var(--bg-tertiary)}.dark-theme .project-card,[data-theme=dark] .project-card{background:var(--bg-card);border:1px solid var(--border-color)}.dark-theme .contact-item,[data-theme=dark] .contact-item{background:var(--bg-secondary)}.dark-theme svg,[data-theme=dark] svg{color:var(--text-secondary)}body{background:var(--bg-primary);color:var(--text-primary)}section{background:var(--bg-primary)}section:nth-child(2n){background:var(--bg-secondary)}.card,.project-card,.skill-item,.contact-item{background:var(--bg-card);border:1px solid var(--border-color);box-shadow:var(--shadow-card)}.card:hover,.project-card:hover,.skill-item:hover,.contact-item:hover{box-shadow:var(--shadow-hover)}.btn{border:2px solid transparent}.btn.btn-primary{background:var(--gradient-primary);color:var(--text-inverse)}.btn.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}.btn.btn-secondary{background:transparent;border-color:var(--accent-primary);color:var(--accent-primary)}.btn.btn-secondary:hover{background:var(--accent-primary);color:var(--text-inverse)}input,textarea,select{background:var(--bg-secondary);border:1px solid var(--border-color);color:var(--text-primary)}input:focus,textarea:focus,select:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px #667eea1a}input::placeholder,textarea::placeholder,select::placeholder{color:var(--text-muted)}a{color:var(--accent-primary)}a:hover{color:var(--accent-secondary)}.dark-theme ::-webkit-scrollbar,[data-theme=dark] ::-webkit-scrollbar{width:8px}.dark-theme ::-webkit-scrollbar-track,[data-theme=dark] ::-webkit-scrollbar-track{background:var(--bg-secondary)}.dark-theme ::-webkit-scrollbar-thumb,[data-theme=dark] ::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:4px}.dark-theme ::-webkit-scrollbar-thumb:hover,[data-theme=dark] ::-webkit-scrollbar-thumb:hover{background:var(--border-color)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6;background:var(--bg-primary);color:var(--text-primary);overflow-x:hidden;transition:background-color .3s ease,color .3s ease}.hero{padding-top:80px}section{scroll-margin-top:80px}a,button{transition:all .3s ease}.container{max-width:1200px;margin:0 auto;padding:0 2rem}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@media screen and (max-width: 768px){body{font-size:14px}}@media print{.navbar,.scroll-indicator,.btn{display:none}}