:root{--bg-color:#f8fafc;--bg-card:#fff;--text-main:#0f172a;--text-muted:#475569;--primary:#2563eb;--primary-hover:#1d4ed8;--primary-bg:#eff6ff;--border:#e2e8f0;--shadow-sm:0 1px 2px 0 #0000000d;--shadow:0 4px 6px -1px #0000000d, 0 2px 4px -2px #0000000d;--shadow-hover:0 20px 25px -5px #0000001a, 0 8px 10px -6px #0000001a;--danger:#ef4444;--danger-hover:#dc2626;--success:#10b981;--radius-md:8px;--radius-lg:16px;--transition:all .25s cubic-bezier(.4, 0, .2, 1)}:root.dark{--bg-color:#020617;--bg-card:#0f172a;--text-main:#f8fafc;--text-muted:#94a3b8;--border:#1e293b;--primary:#3b82f6;--primary-hover:#60a5fa;--primary-bg:#1e3a8a;--shadow-sm:0 1px 2px 0 #00000080;--shadow:0 4px 6px -1px #0006, 0 2px 4px -2px #0006;--shadow-hover:0 20px 25px -5px #00000080, 0 8px 10px -6px #00000080}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-main);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;flex-direction:column;min-height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;transition:background-color .3s,color .3s;display:flex}.navbar{background-color:var(--bg-card);border-bottom:1px solid var(--border);z-index:100;justify-content:space-between;align-items:center;padding:1rem 3rem;transition:background-color .3s,border-color .3s;display:flex;position:sticky;top:0}.logo{color:var(--primary);letter-spacing:-.02em;align-items:center;gap:.6rem;font-size:1.35rem;font-weight:700;display:flex}.nav-links{gap:.5rem;display:flex}.nav-btn{color:var(--text-muted);cursor:pointer;border-radius:var(--radius-md);transition:var(--transition);background:0 0;border:none;padding:.5rem 1rem;font-size:.95rem;font-weight:500}.nav-btn:hover{background:var(--primary-bg);color:var(--primary)}.nav-btn.active{background:var(--primary-bg);color:var(--primary);font-weight:600}#theme-btn{cursor:pointer;color:var(--text-muted);transition:var(--transition);background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;padding:.6rem;display:flex}#theme-btn:hover{background-color:var(--primary-bg);color:var(--primary)}main{flex:1;width:100%;max-width:1150px;margin:0 auto;padding:3rem 2rem}.view{opacity:0;animation:.4s cubic-bezier(.16,1,.3,1) forwards fadeUp;display:none}.view.active{display:block}@keyframes fadeUp{0%{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}.hero{text-align:center;margin-bottom:4rem;padding:3rem 0 1rem}.hero h1{letter-spacing:-.03em;background:linear-gradient(135deg, var(--text-main) 0%, var(--primary) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:1.5rem;font-size:3.5rem;font-weight:800;line-height:1.15}:root.dark .hero h1{background:linear-gradient(135deg, #fff 0%, var(--primary-hover) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.hero p{color:var(--text-muted);max-width:650px;margin:0 auto;font-size:1.2rem;line-height:1.6}.tools-grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:2rem;display:grid}.tool-card{background-color:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);text-align:center;cursor:pointer;transition:var(--transition);box-shadow:var(--shadow);flex-direction:column;align-items:center;padding:2.5rem 2rem;display:flex}.tool-card:hover,.tool-card:focus{box-shadow:var(--shadow-hover);border-color:var(--primary);outline:none;transform:translateY(-8px)}.tool-card i{color:var(--primary);width:54px;height:54px;margin-bottom:1.5rem;transition:transform .3s}.tool-card:hover i{transform:scale(1.1)}.tool-card h3{letter-spacing:-.01em;margin-bottom:.75rem;font-size:1.35rem;font-weight:700}.tool-card p{color:var(--text-muted);font-size:1rem;line-height:1.6}.view-header{text-align:center;margin-bottom:3.5rem}.view-header h2{letter-spacing:-.02em;margin-bottom:.75rem;font-size:2.5rem;font-weight:800}.view-header p{color:var(--text-muted);font-size:1.15rem}.dropzone{border:2px dashed var(--border);border-radius:var(--radius-lg);text-align:center;background-color:var(--bg-card);transition:var(--transition);cursor:pointer;flex-direction:column;align-items:center;gap:1.25rem;padding:4.5rem 2rem;display:flex}.dropzone:hover,.dropzone.dragover{border-color:var(--primary);background-color:var(--primary-bg);transform:scale(1.01)}.dropzone p{color:var(--text-muted);font-size:1.1rem}.dropzone p strong{color:var(--primary)}.file-input{display:none}.btn{background-color:var(--primary);color:#fff;border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);box-shadow:var(--shadow-sm);border:none;align-items:center;gap:.6rem;padding:.85rem 1.75rem;font-size:1.05rem;font-weight:600;display:inline-flex}.btn:hover:not(:disabled){background-color:var(--primary-hover);box-shadow:var(--shadow);transform:translateY(-2px)}.btn:active:not(:disabled){transform:translateY(1px)}.btn:disabled{opacity:.6;cursor:not-allowed}.btn.danger{background-color:var(--danger)}.btn.danger:hover:not(:disabled){background-color:var(--danger-hover)}.btn.secondary{color:var(--text-main);border:1px solid var(--border);background-color:#0000}.btn.secondary:hover:not(:disabled){background-color:var(--bg-card);border-color:var(--text-muted)}:root.dark .btn.secondary:hover:not(:disabled){background-color:var(--text-muted);color:#fff}.btn-sm{padding:.6rem 1.2rem;font-size:.95rem}footer{text-align:center;border-top:1px solid var(--border);color:var(--text-muted);background:var(--bg-card);margin-top:auto;padding:2.5rem;font-size:.95rem}.hidden{display:none!important}@media (width<=900px){.hero h1{font-size:2.75rem}}@media (width<=768px){.nav-links{display:none}.navbar{padding:1rem 1.5rem}main{padding:2.5rem 1.5rem}}