:root{--primary-color:#6366f1;--primary-hover:#4f46e5;--bg-start:#e0e7ff;--bg-end:#f3e8ff;--text-dark:#1e293b;--text-light:#64748b;--glass-bg:#ffffffb3;--glass-border:#ffffff80;--glass-shadow:0 8px 32px 0 #1f26871a;--danger:#ef4444;--success:#10b981}*{box-sizing:border-box;margin:0;padding:0}body{background:linear-gradient(135deg, var(--bg-start) 0%, var(--bg-end) 100%);color:var(--text-dark);background-attachment:fixed;min-height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6}.glass-panel{background:var(--glass-bg);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-border);box-shadow:var(--glass-shadow);border-radius:16px;padding:24px;transition:transform .2s,box-shadow .2s}.glass-panel:hover{transform:translateY(-2px);box-shadow:0 12px 40px #1f268726}h1,h2,h3{letter-spacing:-.025em;margin-bottom:1rem;font-weight:700}h1{color:var(--primary-color);font-size:2.5rem}h2{font-size:1.8rem}h3{font-size:1.25rem}.btn{cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;gap:.5rem;padding:.5rem 1.25rem;font-size:.95rem;font-weight:600;transition:all .2s;display:inline-flex}.btn-primary{background-color:var(--primary-color);color:#fff;box-shadow:0 4px 14px #6366f163}.btn-primary:hover{background-color:var(--primary-hover);transform:translateY(-1px);box-shadow:0 6px 20px #6366f166}.btn-secondary{color:var(--text-dark);background:#fffc;border:1px solid #0000001a}.btn-secondary:hover{background:#fff}.btn-danger{background-color:var(--danger);color:#fff}.form-group{flex-direction:column;margin-bottom:1.5rem;display:flex}.form-group label{color:var(--text-dark);margin-bottom:.5rem;font-size:.9rem;font-weight:600}.form-control{background:#ffffffe6;border:1px solid #0000001a;border-radius:8px;padding:.75rem 1rem;font-size:1rem;transition:all .2s}.form-control:focus{border-color:var(--primary-color);outline:none;box-shadow:0 0 0 3px #6366f133}.container{max-width:1200px;margin:0 auto;padding:2rem}.navbar{z-index:100;justify-content:space-between;align-items:center;margin-bottom:2rem;padding:1rem 2rem;display:flex;position:sticky;top:1rem}.navbar-brand{color:var(--primary-color);align-items:center;gap:.5rem;font-size:1.5rem;font-weight:800;text-decoration:none;display:flex}.nav-links{align-items:center;gap:1.5rem;display:flex}.nav-link{color:var(--text-light);font-weight:500;text-decoration:none;transition:color .2s}.nav-link:hover,.nav-link.active{color:var(--primary-color)}.user-badge{background:var(--primary-color);color:#fff;border-radius:999px;padding:.25rem .75rem;font-size:.8rem;font-weight:600}.grid-2{grid-template-columns:1fr 1fr;gap:2rem;display:grid}.grid-3{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem;display:grid}.badge{text-transform:uppercase;border-radius:4px;padding:.25rem .5rem;font-size:.75rem;font-weight:700}.badge-admin{color:#991b1b;background:#fee2e2}.badge-teacher{color:#3730a3;background:#e0e7ff}.badge-student{color:#166534;background:#dcfce7}.image-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1rem;display:grid}.image-card{aspect-ratio:16/9;object-fit:cover;cursor:pointer;border-radius:8px;width:100%;transition:transform .2s}.image-card:hover{transform:scale(1.02)}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;background:#00000080;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.post-card{margin-bottom:1rem;position:relative}.post-author{color:var(--text-light);align-items:center;gap:.5rem;margin-bottom:.5rem;font-size:.85rem;display:flex}.post-content{font-size:1.05rem}.loader{border:4px solid #ffffff4d;border-top:4px solid var(--primary-color);border-radius:50%;width:24px;height:24px;margin:0 auto;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}