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auto;box-sizing:border-box}.hero{display:flex;flex-direction:column-reverse;align-items:center;justify-content:center;min-height:calc(100vh - 90px);padding:0 20px;background:var(--hero-bg);text-align:center;gap:2rem;position:relative;overflow:hidden;box-sizing:border-box;transition:background .3s ease}.hero-content{max-width:600px;z-index:10}.hero-subtitle{font-size:60px;font-weight:700;margin-bottom:20px;color:var(--text-color)}.hero-title{font-size:36px;font-weight:700;color:var(--text-color);margin-bottom:16px}.hero-description{font-size:18px;color:var(--text-secondary);line-height:1.6;margin-bottom:30px}.hero-button{display:inline-block;padding:14px 32px;background-color:var(--button-bg);color:#fff;text-decoration:none;font-size:18px;border-radius:50px;transition:background-color .3s ease;cursor:pointer}.hero-button:hover{background-color:var(--button-hover-bg)}.scroll-indicator{position:static;margin-top:30px;display:flex;justify-content:center;align-items:center}.scroll-indicator span{display:inline-block;width:24px;height:40px;border:2px solid var(--accent-color);border-radius:30px;position:relative}.scroll-indicator span:before{content:"";position:absolute;top:8px;left:50%;width:6px;height:6px;background-color:var(--accent-color);border-radius:50%;transform:translate(-50%);animation:scroll-down 1.5s infinite}@keyframes scroll-down{0%{top:8px;opacity:1}to{top:24px;opacity:0}}.hero-image{position:relative;width:100%;max-width:400px;z-index:10;display:flex;justify-content:center}.hero-image img{max-width:100%;border-radius:20px;box-shadow:var(--shadow-medium);object-fit:cover;position:relative;z-index:10}.hero-image:before{content:"";position:absolute;top:-20px;left:-20px;width:120%;height:120%;background:radial-gradient(circle at 30% 30%,var(--accent-color),#00bfff);border-radius:60% 40% 30% 70%/60% 30% 70% 40%;z-index:1;animation:morph 8s infinite linear;filter:blur(50px);opacity:.6;transition:all .3s ease}@keyframes morph{0%,to{border-radius:60% 40% 30% 70%/60% 30% 70% 40%}50%{border-radius:40% 60% 70% 30%/50% 60% 30% 70%}}section+section{margin-top:80px}@media(min-width:768px){.hero{flex-direction:row;text-align:left;padding:0 40px;gap:4rem}.hero-content,.hero-image{flex:1}}.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}.hero-button.secondary{background:transparent;color:var(--accent-color);border:1px solid var(--accent-color)}.availability-badge{margin-bottom:18px}.hero-stats{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}.hero-stats span{padding:12px 16px;border-radius:16px;background:var(--card-bg);border:1px solid var(--input-border);box-shadow:var(--shadow-light);color:var(--text-secondary)}.hero-stats strong{color:var(--accent-color);display:block;font-size:1.2rem}.certificate-gallery{padding:40px 20px;font-family:Arial,sans-serif;text-align:center;background:var(--bg-color);color:var(--text-color);transition:background .3s ease,color .3s ease}.certificate-gallery h2{color:var(--text-color);margin-bottom:2rem}.cert-grid{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;margin-top:40px}.cert-card{width:280px;background-color:var(--card-bg);border:1px solid var(--input-border);border-radius:10px;cursor:pointer;transition:transform .2s,box-shadow .3s ease;overflow:hidden;box-shadow:var(--shadow-light)}.cert-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-medium)}.cert-card img{width:100%;height:180px;object-fit:cover}.cert-info{padding:15px;text-align:left}.cert-info h3{font-size:1.1rem;margin-bottom:8px;color:var(--text-color)}.cert-info p{font-size:.9rem;color:var(--text-secondary)}.modal{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#000000d9;display:flex;justify-content:center;align-items:center;z-index:999;animation:fadeIn .3s 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#eef7ff 100%);--about-bg: linear-gradient(135deg, #e0f7fa, #ffffff);--projects-bg: linear-gradient(135deg, #f3f8ff, #ffffff);--contact-bg: linear-gradient(to right, #ffffff, #ebf8ff);--skills-bg: linear-gradient(135deg, #fdfbfb, #ebedee);--footer-bg: #05b3a4;--navbar-bg: rgba(254, 247, 239, .6);--shadow-light: 0 8px 20px rgba(0, 0, 0, .05);--shadow-medium: 0 8px 24px rgba(0, 0, 0, .12)}[data-theme=dark]{--bg-color: #121212;--text-color: #eaeaea;--text-secondary: #bbb;--accent-color: #00bfff;--card-bg: #1a1a1a;--input-bg: #222;--input-border: #444;--button-bg: #00bfff;--button-hover-bg: #0099cc;--hero-bg: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);--about-bg: linear-gradient(135deg, #1e1e1e, #2a2a2a);--projects-bg: linear-gradient(135deg, #0e0e0e, #1a1a1a);--contact-bg: linear-gradient(to right, #1a1a1a, #0f0f0f);--skills-bg: linear-gradient(135deg, #111, #1e1e1e);--footer-bg: #034a42;--navbar-bg: rgba(18, 18, 18, .6);--shadow-light: 0 8px 20px rgba(255, 255, 255, .05);--shadow-medium: 0 8px 24px rgba(255, 255, 255, .1)}*{margin:0;padding:0;box-sizing:border-box;font-family:sans-serif}body{margin:0;font-family:Arial,sans-serif;background:var(--bg-color);color:var(--text-color);transition:background .3s ease,color .3s ease}a{text-decoration:none;color:var(--accent-color)}a:hover{text-decoration:underline}.theme-toggle{background:none;border:none;font-size:1rem;cursor:pointer;margin-left:1rem;color:var(--accent-color);padding:.3rem .6rem;border-radius:6px;transition:background-color .3s ease}.theme-toggle:hover{background-color:var(--accent-color);color:var(--bg-color)}.hero{background:var(--hero-bg)!important}.about{background:var(--about-bg)!important}.projects{background:var(--projects-bg)!important}.contact{background:var(--contact-bg)!important}.skills-section{background:var(--skills-bg)!important}.footer{background:var(--footer-bg)!important}.about-card,.project-card,.skill-card{background:var(--card-bg)!important;color:var(--text-color)!important;box-shadow:var(--shadow-light)!important}.contact-form input,.contact-form textarea{background-color:var(--input-bg)!important;border:1px solid var(--input-border)!important;color:var(--text-color)!important}.contact-form input:focus,.contact-form textarea:focus{border-color:var(--accent-color)!important;outline:none}.contact-form button{background-color:var(--button-bg)!important;color:var(--bg-color)!important;transition:background-color .3s ease}.contact-form button:hover{background-color:var(--button-hover-bg)!important}.hero-subtitle,.hero-title,.about-title,.projects-title,.contact-title,.skills-title,.category-title{color:var(--text-color)!important}.hero-description,.about-description,.projects-subtitle,.contact-subtitle,.project-description{color:var(--text-secondary)!important}.project-title,.skill-card p{color:var(--text-color)!important}.project-category{color:var(--text-secondary)!important}.navbar{background-color:var(--navbar-bg)!important}.logo,.menu-item{color:var(--text-color)!important}.menu-item:hover{color:var(--accent-color)!important}.cert-card{background-color:var(--card-bg)!important;color:var(--text-color)!important;box-shadow:var(--shadow-light)!important}.modal-content{background:var(--card-bg)!important;color:var(--text-color)!important}.cert-info h3,.modal-text h3{color:var(--text-color)!important}.cert-info p,.modal-text p{color:var(--text-secondary)!important}.page-shell{width:min(1120px,calc(100% - 40px));margin:0 auto;padding:96px 0;min-height:70vh}.page-header,.empty-state{text-align:center;margin-bottom:36px}.page-header h1,.empty-state h1{color:var(--text-color);font-size:clamp(2rem,5vw,3.5rem);margin-bottom:14px}.page-header p,.empty-state p{color:var(--text-secondary);font-size:1.05rem;line-height:1.7;max-width:680px;margin:0 auto}.problem-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px}.problem-grid.two-col{max-width:820px;margin:0 auto}.problem-card,.page-button{text-decoration:none}.problem-card{display:block;background:var(--card-bg);border:1px solid var(--input-border);border-radius:22px;padding:28px;box-shadow:var(--shadow-light);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}.problem-card:hover,.problem-card:focus-visible{transform:translateY(-6px);box-shadow:var(--shadow-medium);border-color:var(--accent-color);outline:none}.problem-card h2{color:var(--text-color);margin-bottom:10px}.problem-card p{color:var(--text-secondary);line-height:1.65;margin-bottom:18px}.problem-card span,.page-button{color:var(--accent-color);font-weight:700}.page-button{display:inline-flex;margin-top:24px;padding:12px 18px;border:1px solid var(--accent-color);border-radius:999px}.problem-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-medium);border-color:color-mix(in srgb,var(--accent-color) 45%,var(--input-border));text-decoration:none}.problem-card h2{color:var(--text-color);margin:10px 0}.problem-card p{color:var(--text-secondary);line-height:1.7;margin-bottom:18px}.problem-card strong,.problem-stat{color:var(--accent-color)}.problem-stat{display:inline-flex;font-size:.82rem;font-weight:800;background:color-mix(in srgb,var(--accent-color) 12%,transparent);padding:7px 12px;border-radius:999px}.problem-toolbar{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:26px}.problem-toolbar input{width:min(100%,520px);border:1px solid var(--input-border);background:var(--card-bg);color:var(--text-color);border-radius:999px;padding:14px 18px;outline:none;box-shadow:var(--shadow-light)}.problem-toolbar input:focus{border-color:var(--accent-color)}.page-button.compact{margin-top:0;white-space:nowrap}.problem-list{display:grid;gap:22px}.problem-detail-card{background:var(--card-bg);border:1px solid var(--input-border);border-radius:22px;padding:24px;box-shadow:var(--shadow-light)}.problem-detail-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.problem-level{color:var(--text-secondary);font-size:.85rem;font-weight:700}.problem-detail-card h2{color:var(--text-color);margin-bottom:10px}.problem-detail-card p{color:var(--text-secondary);line-height:1.7;margin-bottom:16px}.problem-detail-card pre{overflow-x:auto;background:color-mix(in srgb,var(--bg-color) 92%,#000 8%);color:var(--text-color);border:1px solid var(--input-border);border-radius:16px;padding:18px;line-height:1.6;font-size:.92rem}.empty-state.small{margin-top:32px}.empty-state.small h2{color:var(--text-color)}@media(max-width:640px){.problem-toolbar{flex-direction:column;align-items:stretch}.page-button.compact{justify-content:center}}.section-panel{width:min(1180px,calc(100% - 32px));margin:80px auto;padding:64px 24px;border-radius:28px;background:var(--card-bg);box-shadow:var(--shadow-light)}.section-panel h2{font-size:clamp(2rem,4vw,3.2rem);color:var(--text-color);margin:8px 0 28px}.section-eyebrow,.availability-badge{display:inline-flex;width:fit-content;align-items:center;gap:8px;color:var(--accent-color);background:color-mix(in srgb,var(--accent-color) 12%,transparent);border:1px solid color-mix(in srgb,var(--accent-color) 28%,transparent);padding:8px 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auto;min-height:60vh}.project-detail-hero{display:grid;grid-template-columns:minmax(280px,.95fr) 1fr;gap:28px;align-items:center;background:var(--card-bg);box-shadow:var(--shadow-light);border-radius:28px;padding:26px}.project-detail-hero img{width:100%;border-radius:22px;aspect-ratio:16 / 10;object-fit:cover}.project-detail-hero h1{font-size:clamp(2rem,5vw,4rem);margin:16px 0}.project-detail-hero p{color:var(--text-secondary);line-height:1.8}@media(max-width:760px){.timeline-item,.project-detail-hero{grid-template-columns:1fr}.section-panel{padding:42px 18px}}