@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700&display=swap";:root{--primary:#4f46e5;--primary-hover:#4338ca;--secondary:#1e293b;--background:#f8fafc;--surface:#fff;--text-main:#0f172a;--text-muted:#64748b;--border:#e2e8f0;--error:#f43f5e;--success:#10b981;--warning:#f59e0b;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;--radius-sm:.375rem;--radius-md:.5rem;--radius-lg:.75rem;--font-sans:"Inter", system-ui, -apple-system, sans-serif;--font-heading:"Outfit", sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--background);color:var(--text-main);line-height:1.5;overflow-x:hidden}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);color:var(--secondary);font-weight:700}a{color:inherit;text-decoration:none;transition:all .2s}button{cursor:pointer;border:none;outline:none;font-family:inherit;transition:all .2s}input,textarea,select{font-family:inherit;font-size:1rem}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--background)}::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#94a3b8}.container{max-width:1280px;margin:0 auto;padding:0 1.25rem}@media (width>=640px){.container{padding:0 2rem}}.glass-card{-webkit-backdrop-filter:blur(10px);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);background:#ffffffb3;border:1px solid #ffffff4d}.btn-primary{background:var(--primary);color:#fff;border-radius:var(--radius-md);align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-weight:600;display:inline-flex}.btn-primary:hover{background:var(--primary-hover);box-shadow:var(--shadow-md);transform:translateY(-1px)}.btn-secondary{background:var(--surface);color:var(--secondary);border:1px solid var(--border);border-radius:var(--radius-md);padding:.75rem 1.5rem;font-weight:600}.btn-secondary:hover{background:var(--background);border-color:#cbd5e1}.flex{display:flex}.gap-4{gap:1rem}.gap-2{gap:.5rem}.items-center{align-items:center}.justify-between{justify-content:space-between}.teacher-layout{background-color:var(--background);min-height:100vh;position:relative}.mobile-topbar{border-bottom:1px solid var(--border);z-index:998;height:60px;box-shadow:var(--shadow-sm);background:#fff;align-items:center;gap:1rem;padding:0 1.25rem;display:none;position:fixed;top:0;left:0;right:0}.mobile-topbar-logo{font-weight:700;font-family:var(--font-heading);color:var(--secondary);align-items:center;gap:.5rem;font-size:1.1rem;text-decoration:none;display:flex}.mobile-topbar-logo span{color:var(--primary)}.mobile-menu-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:8px;padding:.4rem;line-height:0}.mobile-menu-btn:hover{background:var(--background);color:var(--secondary)}@media (width<=1024px){.mobile-topbar{display:flex}}.teacher-main{background-color:var(--background);min-height:100vh;margin-left:280px;padding:2.5rem}@media (width<=1024px){.teacher-main{margin-left:0;padding:calc(60px + 1.25rem) 1.25rem 1.25rem}}@media (width>=1025px){.mobile-topbar{display:none!important}}.modal-overlay{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:2000;background:#0f172a99;justify-content:center;align-items:center;padding:1rem;display:flex;position:fixed;inset:0}@media (width>=640px){.modal-overlay{padding:1.5rem}}.premium-modal{background:#fffffffa;border:1px solid #ffffff4d;border-radius:24px;width:100%;max-height:90vh;overflow:hidden auto;box-shadow:0 25px 50px -12px #00000040}.modal-gradient-header{background:linear-gradient(135deg, var(--primary) 0%, #6366f1 100%);color:#fff;z-index:1;justify-content:space-between;align-items:center;padding:1.25rem 1.5rem;display:flex;position:sticky;top:0}@media (width>=640px){.modal-gradient-header{padding:1.75rem 2rem}}.modal-gradient-header h2{color:#fff;align-items:center;gap:.75rem;margin:0;font-size:1.2rem;display:flex}@media (width>=640px){.modal-gradient-header h2{font-size:1.5rem}}.close-btn-white{color:#fff;cursor:pointer;background:#ffffff26;border-radius:12px;flex-shrink:0;padding:.5rem;transition:all .3s cubic-bezier(.4,0,.2,1)}.close-btn-white:hover{background:#ffffff4d;transform:rotate(90deg)}.modal-body-p{padding:1.25rem}@media (width>=640px){.modal-body-p{padding:2.25rem}}.custom-input-group{margin-bottom:1.5rem}.custom-input-group label{text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);margin-bottom:.75rem;font-size:.75rem;font-weight:800;display:block}.styled-input{width:100%;color:var(--secondary);background:#f8fafc;border:2px solid #f1f5f9;border-radius:14px;padding:.875rem 1.125rem;font-size:.95rem;transition:all .2s}.styled-input:focus{border-color:var(--primary);background:#fff;outline:none;box-shadow:0 0 0 5px #4f46e514}.styled-input::placeholder{color:#94a3b8}.animate-spin{animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.nav-fixed{z-index:50;width:100%;transition:all .3s;position:fixed;top:0;left:0}.nav-transparent{background:0 0;padding:1.25rem 0}.nav-scrolled{-webkit-backdrop-filter:blur(12px);background:#ffffffd1;border-bottom:1px solid #e2e8f080;padding:.75rem 0;box-shadow:0 1px 3px #0000000d}.nav-container{justify-content:space-between;align-items:center;display:flex}.nav-logo{align-items:center;gap:.5rem;display:flex}.logo-box{background:var(--primary);color:#fff;border-radius:12px;justify-content:center;align-items:center;width:40px;height:40px;display:flex;box-shadow:0 4px 6px -1px #4f46e533}.logo-text{font-size:1.25rem;font-weight:700;font-family:var(--font-heading);letter-spacing:-.025em;color:var(--secondary)}.logo-text span{color:var(--primary)}.nav-desktop{align-items:center;gap:2rem;display:none}@media (width>=768px){.nav-desktop{display:flex}}.nav-links{align-items:center;gap:1.5rem;display:flex}.nav-link{color:var(--text-muted);font-weight:500;transition:color .2s}.nav-link:hover{color:var(--primary)}.nav-divider{background:var(--border);width:1px;height:24px}.nav-actions{align-items:center;gap:1rem;display:flex}.btn-signin{color:var(--text-muted);padding:.5rem 1rem;font-weight:500}.btn-signin:hover{color:var(--primary)}.nav-mobile-toggle{color:var(--text-muted);background:0 0;padding:.5rem;display:block}@media (width>=768px){.nav-mobile-toggle{display:none}}.mobile-menu{border-bottom:1px solid var(--border);width:100%;box-shadow:var(--shadow-lg);background:#fff;flex-direction:column;gap:1.5rem;padding:1.5rem;display:flex;position:absolute;top:100%;left:0}.mobile-link{color:var(--text-muted);padding:.5rem 0;font-size:1.125rem;font-weight:500}