:root{--primary: #4F46E5;--primary-hover: #4338CA;--secondary: #10B981;--background: #0F172A;--surface: #1E293B;--surface-hover: #334155;--text: #F8FAFC;--text-muted: #94A3B8;--border: #334155;--accent: #F43F5E}body.light-mode{--background: #F8FAFC;--surface: #FFFFFF;--surface-hover: #F1F5F9;--text: #0F172A;--text-muted: #64748B;--border: #E2E8F0}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--background);color:var(--text);line-height:1.5;-webkit-font-smoothing:antialiased}h1,h2,h3,h4,h5,h6{font-family:Outfit,system-ui,-apple-system,sans-serif}.app-container{min-height:100vh;display:flex;flex-direction:column}.header{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 2rem;background:#1e293bb3;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.logo-container{display:flex;align-items:center;gap:.75rem}.logo-text{font-size:1.5rem;font-weight:800;background:linear-gradient(135deg,var(--primary) 0%,#A855F7 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.language-switcher{display:flex;gap:.5rem}.lang-btn{background:transparent;border:1px solid var(--border);color:var(--text-muted);padding:.5rem 1rem;border-radius:9999px;cursor:pointer;font-family:Inter;font-size:.875rem;font-weight:500;transition:all .2s ease}.lang-btn:hover{background:var(--surface-hover);color:var(--text)}.lang-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}.hero{flex:1;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:4rem 2rem;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;top:-20%;left:-10%;width:50vw;height:50vw;background:radial-gradient(circle,rgba(79,70,229,.15) 0%,transparent 70%);border-radius:50%;z-index:-1}.hero:after{content:"";position:absolute;bottom:-20%;right:-10%;width:60vw;height:60vw;background:radial-gradient(circle,rgba(16,185,129,.1) 0%,transparent 70%);border-radius:50%;z-index:-1}.hero-title{font-size:clamp(3rem,8vw,5rem);font-weight:800;margin-bottom:1rem;line-height:1.1;max-width:800px}.hero-subtitle{font-size:clamp(1.125rem,3vw,1.5rem);color:var(--text-muted);max-width:600px;margin-bottom:2.5rem}.cta-group{display:flex;gap:1rem;flex-wrap:wrap;justify-content:center}.btn{padding:.875rem 1.5rem;border-radius:.5rem;font-size:1rem;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s,background-color .2s;border:none;font-family:Inter}.btn-primary{background-color:var(--primary);color:#fff;box-shadow:0 4px 14px #4f46e563}.btn-primary:hover{background-color:var(--primary-hover);transform:translateY(-2px);box-shadow:0 6px 20px #4f46e580}.btn-secondary{background-color:var(--surface);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{background-color:var(--surface-hover);transform:translateY(-2px)}.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;padding:4rem 2rem;max-width:1200px;margin:0 auto;width:100%}.feature-card{background:var(--surface);border:1px solid var(--border);border-radius:1rem;padding:2rem;transition:transform .3s,box-shadow .3s}.feature-card:hover{transform:translateY(-5px);box-shadow:0 10px 30px -10px #00000080;border-color:var(--primary)}.feature-icon{width:48px;height:48px;border-radius:12px;background:#4f46e51a;color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:1.5rem}.feature-icon svg{width:24px;height:24px}.feature-title{font-size:1.25rem;font-weight:700;margin-bottom:.75rem}.feature-desc{color:var(--text-muted)}.sidebar{width:280px;background:var(--surface);border-right:1px solid var(--border);height:100vh;position:sticky;top:0;display:flex;flex-direction:column;transition:width .3s ease;overflow-x:hidden}.sidebar.collapsed{width:80px}.sidebar-logo{padding:2rem;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.sidebar.collapsed .sidebar-logo{padding:1.5rem 0;flex-direction:column;gap:1.5rem;justify-content:center}.sidebar.collapsed .logo-text{display:none}.sidebar-nav{display:flex;flex-direction:column;padding:1.5rem 1rem;gap:.5rem}.sidebar-link{padding:.875rem 1rem;border-radius:.5rem;color:var(--text-muted);text-decoration:none;font-weight:500;transition:all .2s ease;display:flex;align-items:center;gap:.75rem;white-space:nowrap}.sidebar.collapsed .sidebar-link{justify-content:center;padding:.875rem 0}.sidebar-text{transition:opacity .2s ease}.sidebar.collapsed .sidebar-text{opacity:0;width:0;overflow:hidden;display:none}.sidebar-btn{width:100%;background:transparent;border:none;color:var(--text-muted);text-align:left;padding:.875rem 1rem;font-weight:500;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:all .2s ease;border-radius:.5rem}.sidebar.collapsed .sidebar-btn{justify-content:center;padding:.875rem 0}.sidebar-btn:hover{background:var(--surface-hover);color:var(--text)}.sidebar-btn.active{background:#4f46e51a;color:var(--primary);font-weight:700}.sidebar-link:hover{background:var(--surface-hover);color:var(--text)}.sidebar-link.active{background:var(--primary);color:#fff;font-weight:700}.sidebar.collapsed .sidebar-link.active{background:transparent;color:var(--primary)}.page-container{padding:2rem 3rem;max-width:1200px;margin:0 auto}.page-title{font-size:2rem;font-weight:800;margin-bottom:2rem;color:var(--text)}.content-grid{display:grid;grid-template-columns:1fr 2fr;gap:2rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:1rem;padding:2rem}.form .input{width:100%;padding:.75rem;margin-bottom:1rem;border-radius:.5rem;border:1px solid var(--border);background:var(--background);color:var(--text)}.form .input:focus{outline:none;border-color:var(--primary)}.font-bold{font-weight:700}