:root{--bg:#f3f7f7;--text:#111;--accent:#80ced7;--secondary:#003249;--btn-bg:#80ced7;--btn-text:#f3f7f7;--card-bg:#f4f4f4}[data-theme=dark]{--bg:#0e0f18;--text:#f3f7f7;--accent:#80ced7;--secondary:#161b22;--btn-bg:#80ced7;--btn-text:#f3f7f7;--card-bg:#1e1e1e}*{box-sizing:border-box}body{margin:0;font-family:Inter,sans-serif;background-color:var(--bg);color:var(--text);scroll-behavior:smooth;transition:background-color .3s,color .3s}header{background:var(--bg);border-bottom:1px solid #eee;position:sticky;top:0;z-index:1000}.container{max-width:960px;margin:auto;padding:1.5rem}.nav{display:flex;justify-content:space-between;align-items:center}nav a{margin-left:1.2rem;text-decoration:none;color:var(--text);font-weight:600;transition:color .3s}#theme-toggle,nav a:hover{color:var(--accent)}#theme-toggle{background:none;border:none;font-size:1.5rem;cursor:pointer;margin-left:1rem}.hero{text-align:center;padding:6rem 1rem;background:#007ea7;color:#fff;border-radius:0 0 2rem 2rem}.hero h2{font-size:2.75rem;margin-bottom:.5rem}.hero p{font-size:1.25rem}.btn{margin-top:1rem;display:inline-block;background:var(--btn-bg);color:var(--btn-text);padding:.75rem 1.5rem;border-radius:12px;text-decoration:none;font-weight:600;transition:background .3s}.btn:hover{background:#003249}.section{padding:4rem 1rem;background:var(--bg)}h3{font-size:2rem;margin-bottom:1rem;color:var(--accent)}.card{background:var(--card-bg);padding:1.5rem;border-radius:1rem;box-shadow:0 4px 10px rgba(0,0,0,.05);transition:transform .3s ease}.card img{max-width:100%;border-radius:.75rem;margin-bottom:1rem}.card:hover{transform:translateY(-5px)}.projects-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem}form{display:flex;flex-direction:column;gap:1rem}input,textarea{padding:.75rem;border-radius:.5rem;border:1px solid #ccc;background:var(--bg);color:var(--text)}button.btn{background:var(--btn-bg);color:var(--btn-text);border:none;padding:.75rem;border-radius:.75rem;cursor:pointer}button.btn:hover{background:#4f46e5}footer{text-align:center;padding:2rem;font-size:.9rem;background:var(--secondary);border-top:1px solid #eee}.accent{color:var(--accent)}