:root{--bg-dark: #0f172a;--bg-card: #1e293b;--primary: #6366f1;--primary-hover: #4f46e5;--text-main: #f8fafc;--text-dim: #94a3b8;--sidebar-w: 260px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-dark);color:var(--text-main);line-height:1.6;overflow-x:hidden}.landing-wrapper{min-height:100vh}.navbar{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 5%;background:#0f172ae6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);position:sticky;top:0;z-index:1000;border-bottom:1px solid #1e293b}.logo{font-size:1.5rem;font-weight:800;letter-spacing:-1px}.logo span,.highlight{color:var(--primary)}.nav-links{display:flex;list-style:none;gap:2rem;align-items:center}.nav-links a{text-decoration:none;color:var(--text-dim);font-weight:500;transition:.3s}.nav-links a:hover{color:var(--primary)}.login-btn{background:var(--primary);color:#fff;border:none;padding:.6rem 1.5rem;border-radius:8px;cursor:pointer;font-weight:600;transition:.3s}.login-btn:hover{background:var(--primary-hover)}.hero{padding:120px 5% 80px;text-align:center;background:radial-gradient(circle at top,#1e293b,#0f172a)}.hero h1{font-size:clamp(2.5rem,6vw,4rem);font-weight:800;margin-bottom:1.5rem;line-height:1.1}.hero p{color:var(--text-dim);max-width:700px;margin:0 auto 2.5rem;font-size:1.2rem}.hero-btns{display:flex;justify-content:center;gap:1rem}.btn-primary{padding:1rem 2rem;background:var(--primary);border:none;color:#fff;border-radius:50px;font-weight:700;cursor:pointer;transition:.3s}.btn-secondary{padding:1rem 2rem;background:transparent;border:1px solid #334155;color:#fff;border-radius:50px;cursor:pointer;transition:.3s}.btn-secondary:hover{background:#1e293b}.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;padding:80px 5%;max-width:1200px;margin:0 auto}.card{background:var(--bg-card);padding:2.5rem;border-radius:20px;border:1px solid #334155;transition:.3s}.card:hover{transform:translateY(-5px);border-color:var(--primary)}.icon{font-size:3rem;margin-bottom:1rem}.dashboard{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-w);background:#161b22;border-right:1px solid #30363d;display:flex;flex-direction:column;padding:2rem;position:fixed;height:100vh}.sidebar-logo{font-size:1.5rem;font-weight:700;margin-bottom:3rem}.side-nav{display:flex;flex-direction:column;gap:.5rem;flex-grow:1}.side-nav a{text-decoration:none;color:var(--text-dim);padding:.8rem 1rem;border-radius:8px}.side-nav a.active{background:#6366f11a;color:var(--primary);font-weight:600}.logout-btn{background:transparent;border:1px solid #f43f5e;color:#f43f5e;padding:.6rem;border-radius:8px;cursor:pointer;transition:.3s}.logout-btn:hover{background:#f43f5e;color:#fff}.main-content{margin-left:var(--sidebar-w);padding:3rem;width:100%}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem;margin:2rem 0}.stat-card{background:var(--bg-card);padding:1.5rem;border-radius:12px;border:1px solid #334155}.stat-card span{display:block;font-size:2rem;font-weight:800;color:var(--primary)}.course-row{display:flex;justify-content:space-between;align-items:center;background:#161b22;padding:1.5rem;border-radius:12px;border:1px solid #30363d;margin-top:1rem}.footer{text-align:center;padding:40px;color:var(--text-dim);border-top:1px solid #1e293b}.btn-access{background:#30363d;color:#fff;border:none;padding:.6rem 1.2rem;border-radius:8px;font-weight:600;cursor:pointer;transition:all .3s ease;white-space:nowrap}.login-container{min-height:100vh;display:flex;justify-content:center;align-items:center;background:radial-gradient(circle at center,#1e293b,#0f172a);padding:20px}.login-card{background:var(--bg-card);padding:3rem;border-radius:24px;border:1px solid #334155;width:100%;max-width:450px;box-shadow:0 20px 50px #0000004d}.login-card h2{margin-bottom:.5rem;font-size:1.8rem}.login-card p{color:var(--text-dim);margin-bottom:2rem;font-size:.95rem}.input-group{margin-bottom:1.5rem;text-align:left}.input-group label{display:block;margin-bottom:.5rem;font-size:.9rem;font-weight:500;color:var(--text-main)}.input-group input{width:100%;padding:.8rem 1rem;background:#0f172a;border:1px solid #334155;border-radius:8px;color:#fff;font-size:1rem;outline:none;transition:border-color .3s}.input-group input:focus{border-color:var(--primary)}.login-submit-btn{width:100%;padding:1rem;background:var(--primary);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:700;cursor:pointer;transition:background .3s;margin-top:1rem}.login-submit-btn:hover{background:var(--primary-hover)}.back-link{background:none;border:none;color:var(--text-dim);cursor:pointer;font-size:.9rem;margin-bottom:1.5rem;padding:0}.back-link:hover{color:var(--text-main)}.login-footer{text-align:center;margin-top:2rem;font-size:.85rem!important}@media(max-width:768px){.nav-links{display:none}.sidebar{width:100%;height:auto;position:relative;padding:1rem}.main-content{margin-left:0;padding:1.5rem}.hero-btns{flex-direction:column}}.admin-form-section{background:#fff;padding:2rem;border-radius:12px;box-shadow:0 4px 6px #0000000d;max-width:600px;margin-top:2rem}.admin-form{display:flex;flex-direction:column;gap:1.5rem}.admin-form textarea{min-height:100px;padding:.8rem;border:1px solid #ddd;border-radius:8px;resize:vertical}.status-msg{margin-top:1rem;font-weight:500;padding:.5rem;border-radius:4px}