:root{--color-primary:#0f172a;--color-blue:#2563eb;--color-blue-hover:#1d4ed8;--color-blue-subtle:#2563eb14;--color-accent:#14b8a6;--color-accent-subtle:#14b8a61a;--color-background:#f8fafc;--color-surface:#fff;--color-surface-elevated:#fff;--color-surface-hover:#f1f5f9;--color-text-primary:#0f172a;--color-text-secondary:#334155;--color-text-muted:#64748b;--color-border:#e2e8f0;--color-border-subtle:#e2e8f0cc;--font-heading:"Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-body:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono:"JetBrains Mono", monospace;--radius-sm:8px;--radius-md:14px;--radius-card:22px;--radius-pill:9999px;--shadow-sm:0 1px 3px 0 #0f172a0a, 0 1px 2px -1px #0f172a0a;--shadow-md:0 4px 12px -2px #0f172a0f, 0 2px 6px -2px #0f172a0a;--shadow-lg:0 12px 24px -4px #0f172a14, 0 4px 8px -2px #0f172a0a;--shadow-card-hover:0 20px 30px -10px #0f172a1f, 0 8px 16px -4px #0f172a0f;--transition-fast:.18s cubic-bezier(.16, 1, .3, 1);--transition-base:.28s cubic-bezier(.16, 1, .3, 1);--transition-slow:.4s cubic-bezier(.16, 1, .3, 1);--container-max:1240px}[data-theme=dark]{--color-primary:#f8fafc;--color-background:#020617;--color-surface:#0b1120;--color-surface-elevated:#111a2e;--color-surface-hover:#17233d;--color-text-primary:#f8fafc;--color-text-secondary:#cbd5e1;--color-text-muted:#94a3b8;--color-border:#1e293b;--color-border-subtle:#1e293bcc;--color-blue-subtle:#2563eb2e;--color-accent-subtle:#14b8a62e;--shadow-sm:0 1px 3px 0 #0000004d;--shadow-md:0 4px 12px -2px #0006;--shadow-lg:0 12px 24px -4px #00000080;--shadow-card-hover:0 20px 32px -8px #000000a6}[data-design-style=modern-tech]{--color-blue:#2563eb;--color-accent:#14b8a6}[data-design-style=academic-minimal]{--color-blue:#0f766e;--color-blue-hover:#115e59;--color-accent:#d97706}[data-design-style=cyber-stem]{--color-blue:#6366f1;--color-blue-hover:#4f46e5;--color-accent:#06b6d4}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;font-size:16px}body{font-family:var(--font-body);color:var(--color-text-secondary);background-color:var(--color-background);text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;transition:background-color var(--transition-base), color var(--transition-base);line-height:1.65;overflow-x:hidden}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);color:var(--color-text-primary);letter-spacing:-.02em;font-weight:700;line-height:1.25}p{margin-bottom:1rem}p:last-child{margin-bottom:0}a{color:inherit;transition:color 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1rem;font-size:.8125rem;font-weight:600;display:inline-flex}.section-title{letter-spacing:-.025em;margin-bottom:1rem;font-size:clamp(2rem,3.5vw,2.625rem)}.section-subtitle{color:var(--color-text-muted);font-size:clamp(1rem,1.3vw,1.125rem);line-height:1.6}.btn{border-radius:var(--radius-button);transition:all var(--transition-fast);white-space:nowrap;justify-content:center;align-items:center;gap:.5rem;padding:.875rem 1.75rem;font-size:.95rem;font-weight:600;display:inline-flex}.btn-primary{background-color:var(--color-blue);color:#fff;box-shadow:0 4px 14px #2563eb47}.btn-primary:hover{background-color:var(--color-blue-hover);transform:translateY(-2px);box-shadow:0 6px 20px #2563eb59}.btn-secondary{background-color:var(--color-surface);color:var(--color-text-primary);border:1px solid var(--color-border);box-shadow:var(--shadow-sm)}.btn-secondary:hover{background-color:var(--color-surface-hover);border-color:var(--color-text-muted);transform:translateY(-2px)}.btn-accent{background-color:var(--color-accent);color:#fff}.btn-accent:hover{filter:brightness(1.08);transform:translateY(-2px)}.btn-sm{padding:.5rem 1rem;font-size:.85rem}.design-selector-trigger{z-index:1000;background-color:var(--color-surface);color:var(--color-text-primary);border-radius:var(--radius-pill);box-shadow:var(--shadow-lg);border:1px solid var(--color-border);cursor:pointer;transition:all var(--transition-fast);align-items:center;gap:.5rem;padding:.65rem 1.25rem;font-size:.875rem;font-weight:600;display:flex;position:fixed;bottom:1.5rem;right:1.5rem}.design-selector-trigger:hover{border-color:var(--color-blue);transform:translateY(-2px)}.design-selector-modal{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1100;opacity:0;visibility:hidden;transition:all 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var(--transition-fast);flex-direction:column;gap:.65rem;padding:1.25rem 1rem;display:flex}.design-option-card:hover{border-color:var(--color-blue);transform:translateY(-2px)}.design-option-card.active{border-color:var(--color-blue);background-color:var(--color-blue-subtle)}.palette-dots{gap:.35rem;display:flex}.palette-dot{border:1px solid #0000001a;border-radius:50%;width:18px;height:18px}.design-option-card h4{margin:0;font-size:.95rem}.design-option-card p{color:var(--color-text-muted);margin:0;font-size:.775rem;line-height:1.4}.site-header{z-index:900;width:100%;transition:all var(--transition-base);background:0 0;position:fixed;top:0;left:0}.site-header.scrolled{-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--color-border);box-shadow:var(--shadow-sm);background-color:#f8fafce0}[data-theme=dark] .site-header.scrolled{background-color:#0b1120e0}.navbar{height:4.75rem;transition:height var(--transition-fast);justify-content:space-between;align-items:center;display:flex}.site-header.scrolled .navbar{height:4.125rem}.brand-logo{align-items:center;gap:.75rem;text-decoration:none;display:flex}.brand-badge{border-radius:var(--radius-sm);background:linear-gradient(135deg, var(--color-blue), var(--color-accent));color:#fff;width:42px;height:42px;font-size:1.15rem;font-weight:800;font-family:var(--font-heading);justify-content:center;align-items:center;display:flex;box-shadow:0 4px 10px #2563eb40}.brand-meta{flex-direction:column;display:flex}.brand-name{font-family:var(--font-heading);color:var(--color-text-primary);font-size:1.125rem;font-weight:700;line-height:1.2}.brand-title{color:var(--color-text-muted);letter-spacing:.02em;font-size:.75rem;font-weight:500}.nav-links-wrapper{align-items:center;gap:1.75rem;display:flex}.nav-menu{align-items:center;gap:1.5rem;list-style:none;display:flex}.nav-link{color:var(--color-text-secondary);transition:color var(--transition-fast);padding:.4rem 0;font-size:.9375rem;font-weight:500;position:relative}.nav-link:after{content:"";background-color:var(--color-blue);border-radius:var(--radius-pill);width:0;height:2px;transition:width var(--transition-fast);position:absolute;bottom:0;left:0}.nav-link:hover,.nav-link.active{color:var(--color-blue)}.nav-link.active:after{width:100%}.nav-actions{align-items:center;gap:.75rem;display:flex}.theme-toggle-btn{border-radius:var(--radius-sm);background-color:var(--color-surface);border:1px solid var(--color-border);width:40px;height:40px;color:var(--color-text-secondary);transition:all var(--transition-fast);justify-content:center;align-items:center;display:flex}.theme-toggle-btn:hover{background-color:var(--color-surface-hover);color:var(--color-text-primary)}.theme-toggle-btn .icon-moon,[data-theme=dark] .theme-toggle-btn .icon-sun{display:none}[data-theme=dark] .theme-toggle-btn 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var(--transition-fast);position:absolute;top:0;left:0;right:0}.philosophy-card:hover{box-shadow:var(--shadow-card-hover);border-color:#2563eb4d;transform:translateY(-6px)}.philosophy-card:hover:before{opacity:1}.philosophy-top{justify-content:space-between;align-items:center;margin-bottom:1.75rem;display:flex}.philosophy-icon-wrap{border-radius:var(--radius-md);background-color:var(--color-blue-subtle);width:52px;height:52px;color:var(--color-blue);transition:transform var(--transition-fast);justify-content:center;align-items:center;display:flex}.philosophy-card:hover .philosophy-icon-wrap{transform:scale(1.08)}.philosophy-num{font-family:var(--font-mono);color:var(--color-text-muted);opacity:.6;font-size:1.125rem;font-weight:700}.philosophy-card h3{margin-bottom:.75rem;font-size:1.375rem}.philosophy-card p{color:var(--color-text-muted);margin:0;font-size:.9375rem;line-height:1.6}.expertise-grid{grid-template-columns:repeat(4,1fr);gap:1.5rem;display:grid}.expertise-card{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-card);box-shadow:var(--shadow-sm);transition:all var(--transition-fast);flex-direction:column;padding:1.75rem;display:flex}.expertise-card:hover{box-shadow:var(--shadow-md);border-color:var(--color-blue);transform:translateY(-4px)}.expertise-card-header{justify-content:space-between;align-items:center;margin-bottom:1.25rem;display:flex}.expertise-icon-box{border-radius:var(--radius-sm);background-color:var(--color-accent-subtle);width:44px;height:44px;color:var(--color-accent);justify-content:center;align-items:center;display:flex}.expertise-num{font-family:var(--font-mono);color:var(--color-text-muted);font-size:.8125rem;font-weight:600}.expertise-card h3{margin-bottom:.6rem;font-size:1.2rem}.expertise-card p{color:var(--color-text-muted);margin:0;font-size:.875rem;line-height:1.55}.timeline-wrapper{max-width:860px;margin:0 auto;padding:1rem 0;position:relative}.timeline-line{background-color:var(--color-border);z-index:1;width:3px;position:absolute;top:1.5rem;bottom:2rem;left:31px}.timeline-line-progress{background:linear-gradient(180deg, var(--color-blue), var(--color-accent));width:100%;height:0%;transition:height .4s ease-out;position:absolute;top:0;left:0}.timeline-items{flex-direction:column;gap:2.5rem;display:flex}.timeline-item{z-index:2;gap:2rem;display:flex;position:relative}.timeline-dot-wrapper{justify-content:center;display:flex;position:relative}.timeline-dot{background-color:var(--color-surface);border:4px solid var(--color-blue);width:22px;height:22px;box-shadow:0 0 0 4px var(--color-blue-subtle);transition:all var(--transition-fast);border-radius:50%;flex-shrink:0;margin-top:1.25rem}.timeline-item:hover 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p{color:var(--color-text-secondary);margin-bottom:1rem;font-size:.9375rem;line-height:1.65}.timeline-tags{flex-wrap:wrap;gap:.5rem;display:flex}.timeline-tag-pill{background-color:var(--color-background);color:var(--color-text-muted);border-radius:var(--radius-sm);border:1px solid var(--color-border);padding:.25rem .65rem;font-size:.775rem}.projects-filter-bar{flex-wrap:wrap;justify-content:center;align-items:center;gap:.5rem;margin-bottom:3rem;display:flex}.filter-btn{border-radius:var(--radius-pill);color:var(--color-text-muted);background-color:var(--color-surface);border:1px solid var(--color-border);transition:all var(--transition-fast);padding:.55rem 1.25rem;font-size:.9rem;font-weight:600}.filter-btn:hover{color:var(--color-text-primary);border-color:var(--color-text-muted)}.filter-btn.active{background-color:var(--color-blue);color:#fff;border-color:var(--color-blue);box-shadow:0 4px 12px 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