:root{--primary:#6366f1;--primary-dark:#4f46e5;--secondary:#ec4899;--background:#0f172a;--foreground:#f8fafc;--muted:#64748b;--card:#1e293b;--card-hover:#334155;--border:#334155;--success:#22c55e;--warning:#f59e0b;--danger:#ef4444;--radius:12px;--sidebar-width:260px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--background);color:var(--foreground);line-height:1.6}a{color:inherit;text-decoration:none}.login-container{min-height:100vh;display:flex;justify-content:center;align-items:center;background:linear-gradient(135deg,var(--background) 0,#1e1b4b 50%,var(--background) 100%)}.login-card{background:var(--card);padding:3rem;border-radius:var(--radius);border:1px solid var(--border);width:100%;max-width:400px;box-shadow:0 25px 50px rgba(0,0,0,.5)}.login-card h1{text-align:center;margin-bottom:.5rem;background:linear-gradient(135deg,var(--foreground),var(--primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.login-card .subtitle{text-align:center;color:var(--muted);margin-bottom:2rem}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500}.form-group input{width:100%;padding:.875rem 1rem;border-radius:var(--radius);border:1px solid var(--border);background:var(--background);color:var(--foreground);font-size:1rem;transition:border-color .3s ease}.form-group input:focus{outline:none;border-color:var(--primary)}.btn{width:100%;padding:1rem;border-radius:var(--radius);font-weight:600;font-size:1rem;cursor:pointer;transition:all .3s ease;border:none}.btn-primary{background:linear-gradient(135deg,var(--primary) 0,var(--secondary) 100%);color:white}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(99,102,241,.3)}.dashboard-layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-width);background:var(--card);border-right:1px solid var(--border);padding:1.5rem;position:fixed;height:100vh;overflow-y:auto}.sidebar-logo{font-size:1.5rem;font-weight:800;margin-bottom:2rem;padding-bottom:1rem;border-bottom:1px solid var(--border);background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.sidebar-nav{list-style:none}.sidebar-nav li{margin-bottom:.5rem}.sidebar-nav a{display:flex;align-items:center;gap:.75rem;padding:.875rem 1rem;border-radius:var(--radius);color:var(--muted);transition:all .3s ease}.sidebar-nav a.active,.sidebar-nav a:hover{background:var(--background);color:var(--foreground)}.sidebar-nav .icon{font-size:1.25rem}.main-content{margin-left:var(--sidebar-width);flex:1 1;padding:2rem}.page-header{margin-bottom:2rem}.page-header h1{font-size:1.75rem}.page-header p{color:var(--muted)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));grid-gap:1.5rem;gap:1.5rem;margin-bottom:2rem}.stat-card{background:var(--card);padding:1.5rem;border-radius:var(--radius);border:1px solid var(--border)}.stat-card h3{color:var(--muted);font-size:.875rem;font-weight:500;margin-bottom:.5rem}.stat-card .value{font-size:2rem;font-weight:700}.stat-card .change{font-size:.875rem;margin-top:.5rem}.stat-card .change.positive{color:var(--success)}.stat-card .change.negative{color:var(--danger)}.activity-card{background:var(--card);padding:1.5rem;border-radius:var(--radius);border:1px solid var(--border)}.activity-card h2{margin-bottom:1.5rem;font-size:1.125rem}.activity-list{list-style:none}.activity-item{display:flex;gap:1rem;padding:1rem 0;border-bottom:1px solid var(--border)}.activity-item:last-child{border-bottom:none}.activity-icon{width:40px;height:40px;background:var(--background);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.25rem}.activity-content h4{font-size:.875rem;margin-bottom:.25rem}.activity-content p{color:var(--muted);font-size:.8rem}