:root{--primary-blue: #003366;--secondary-blue: #1e90ff;--teacher-purple: #6a1b9a;--light-gray: #f8f8f8;--dark-text: #333333;--shadow-light: rgba(0, 0, 0, .1)}body{margin:0;font-family:Segoe UI,Tahoma,Verdana,sans-serif;background:url(/assets/IMG_7260-Bpg6HFWx.webp) no-repeat center center/cover fixed;color:var(--dark-text);line-height:1.6;min-height:100vh;display:flex;flex-direction:column;justify-content:center;align-items:center;position:relative;overflow-x:hidden;overflow-y:auto}body:before{content:"";position:fixed;inset:0;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#0006;z-index:0}#welcome-screen{position:fixed;top:0;left:0;height:100vh;width:100vw;background:linear-gradient(135deg,#002060,#1e90ff,#002060);background-size:400% 400%;animation:gradientAnimation 18s ease infinite;color:#fff;display:none;flex-direction:column;justify-content:center;align-items:center;text-align:center;z-index:200}@keyframes gradientAnimation{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}#welcome-screen .welcome-logo{width:180px;height:auto;margin-bottom:25px;opacity:0;transform:translateY(-50px) scale(.8);animation:logoDrop 1.2s cubic-bezier(.68,-.55,.27,1.55) forwards;animation-delay:.2s}@keyframes logoDrop{0%{opacity:0;transform:translateY(-100px) scale(.5)}80%{opacity:1;transform:translateY(10px) scale(1.1)}to{opacity:1;transform:translateY(0) scale(1)}}#welcome-screen h1{font-size:3.8rem;opacity:0;animation:fadeInScale 1.2s ease-out forwards;animation-delay:1s;letter-spacing:2px;text-shadow:3px 3px 10px rgba(0,0,0,.4)}@keyframes fadeInScale{0%{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}#login-content{display:flex;flex-direction:column;justify-content:center;align-items:center;width:100%;min-height:100vh}header{position:fixed;top:0;width:100%;background:#fffffff7;padding:15px 40px;box-shadow:0 3px 12px #00000014;z-index:1000;transition:all .3s ease;display:flex;justify-content:flex-start;align-items:center;gap:15px;box-sizing:border-box}.logo-area{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.logo-link{text-decoration:none;display:flex;align-items:center;gap:12px;transition:transform .3s ease;color:inherit}.logo-link:hover{transform:scale(1.02)}.logo-area img{height:45px;transition:transform .3s}.logo-area h2{margin:0;font-size:1.5rem;letter-spacing:1.5px;font-weight:700;color:#002060;border-bottom:2px solid #1e90ff;display:inline-block;padding-bottom:5px}nav{display:flex;gap:20px;align-items:center;flex-wrap:wrap;margin-left:auto;padding-right:10px}nav a{text-decoration:none;color:#002060;font-weight:600;letter-spacing:.5px;position:relative;font-size:.95rem;padding:8px 36px;border-radius:20px;border:2px solid transparent;transition:all .3s ease}nav a:hover{color:#1e90ff;border-color:#1e90ff;background:#1e90ff14;box-shadow:0 3px 10px #0000001a;transform:translateY(-2px)}.login-symbol-link{text-decoration:none;color:#002060;font-size:1.5rem;padding:8px 12px;border-radius:50%;transition:all .3s}.login-symbol-link:hover{background-color:#eef4f8;color:#1e90ff;transform:scale(1.1)}.nav-toggle{display:none;background:transparent;border:none;color:#002060;font-size:1.5rem;cursor:pointer;padding:5px;transition:transform .3s ease;margin-top:5px}.login-section{display:flex;justify-content:center;align-items:center;width:100%;flex-grow:1;padding:110px 20px}.login-container{background:#fff;padding:45px 50px;border-radius:20px;box-shadow:0 10px 30px #0003;max-width:420px;width:100%;text-align:center;z-index:1;opacity:0;transform:translateY(18px) scale(.995);animation:loginAppear .7s cubic-bezier(.2,.9,.2,1) .12s forwards}.login-container .main-logo{height:120px;margin-bottom:5px;opacity:0;transform:translateY(-8px) scale(.96);animation:logoAppear .6s ease .22s forwards}.login-container h3{font-size:1rem;color:var(--primary-blue);font-weight:600;margin-bottom:25px;opacity:0;transform:translateY(6px);animation:titleAppear .6s ease .32s forwards}.login-container form{display:flex;flex-direction:column;align-items:center;opacity:0;transform:translateY(8px);animation:formAppear .7s ease .42s forwards}.login-container form input{width:100%;padding:14px;margin:10px 0;border:1px solid rgba(0,0,0,.15);border-radius:10px;font-size:.95rem;text-align:center;background-color:var(--light-gray)}.login-container form input:focus{outline:none;border-color:var(--secondary-blue);box-shadow:0 0 0 3px #1e90ff33;background-color:#fff}.login-container form input::placeholder{color:#00206099}.login-container form button{width:100%;padding:15px;background:linear-gradient(90deg,#1a73e8,#05f,#1e90ff);color:#fff;border:none;border-radius:30px;font-size:1.05rem;font-weight:700;cursor:pointer;transition:all .3s ease;margin-top:18px;box-shadow:0 4px 15px #0003}.login-container form button:hover{transform:translateY(-3px);box-shadow:0 6px 20px #0000004d}.forgot-password{display:block;margin-top:15px;margin-bottom:10px;font-size:.9rem;text-decoration:none;color:var(--primary-blue);transition:color .3s ease-in-out}.forgot-password:hover{color:var(--secondary-blue)}.register-section{margin-top:20px;font-size:.95rem;text-align:center;opacity:0;transform:translateY(8px);animation:regAppear .6s ease .6s forwards}.register-section p{margin:0 0 8px}.register-buttons{display:flex;gap:12px;justify-content:center;align-items:center;margin-top:8px;flex-wrap:wrap}.register-btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:10px 18px;background:transparent;color:var(--secondary-blue);text-decoration:none;border-radius:12px;font-weight:700;font-size:.95rem;transition:all .18s ease;border:2px solid rgba(30,144,255,.18)}.register-btn:hover{background:var(--secondary-blue);color:#fff;transform:translateY(-3px);box-shadow:0 6px 18px #1e90ff1f}.register-btn.teacher-btn{background:transparent;color:var(--teacher-purple);border-color:#6a1b9a2e;box-shadow:none}.register-btn.teacher-btn:hover{background:var(--teacher-purple);color:#fff;transform:translateY(-3px);box-shadow:0 10px 28px #6a1b9a29}.back-home{margin-top:25px}.back-home a{text-decoration:none;color:var(--primary-blue);font-weight:600;transition:color .3s ease-in-out;font-size:.9rem}.back-home a:hover{color:var(--secondary-blue)}footer{background:linear-gradient(90deg,var(--primary-blue),var(--teacher-purple));color:#fff;padding:18px 30px;display:flex;justify-content:center;align-items:center;gap:18px;font-size:.8rem;flex-wrap:wrap;width:100%;box-shadow:0 -3px 18px #0000001f;border-top:3px solid rgba(255,255,255,.03);position:relative;z-index:1;text-align:center}.powered{font-style:italic;opacity:.8}.btn-loading{position:relative;background:var(--secondary-blue);color:transparent!important;pointer-events:none}.btn-loading .spinner{border:3px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;width:20px;height:20px;animation:spin 1s ease-in-out infinite;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}@keyframes spin{to{transform:translate(-50%,-50%) rotate(360deg)}}@keyframes loginAppear{0%{opacity:0;transform:translateY(18px) scale(.995)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes logoAppear{0%{opacity:0;transform:translateY(-10px) scale(.9)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes titleAppear{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes formAppear{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes regAppear{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media(prefers-reduced-motion:reduce){.login-container,.login-container .main-logo,.login-container h3,.login-container form,.register-section{animation:none!important;transition:none!important;opacity:1!important;transform:none!important}}.toast{position:fixed;top:20px;right:20px;background:var(--secondary-blue);color:#fff;padding:15px 20px;border-radius:10px;box-shadow:0 4px 15px #0003;opacity:0;transform:translateY(-20px);transition:opacity .5s ease-in-out,transform .5s ease-in-out;z-index:2000;visibility:hidden;display:flex;align-items:center;gap:12px;border-left:4px solid rgba(255,255,255,.5);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.toast.show{opacity:1;transform:translateY(0);visibility:visible}.toast.error{background:#e74c3c;border-left-color:#ffd7d1}.toast .toast-icon{width:36px;height:36px;border-radius:50%;background:#ffffff26;display:inline-flex;align-items:center;justify-content:center;font-size:1.1rem}.toast .toast-body{display:flex;flex-direction:column;gap:4px}.toast .toast-title{font-weight:700;letter-spacing:.01em}@media(max-width:768px){header{padding:15px 20px;flex-direction:column;gap:10px}nav{margin-top:10px;justify-content:center;gap:15px;width:100%}.login-section{padding:140px 20px 60px}.login-container{padding:30px;max-width:90%}.login-container .main-logo{height:100px;margin-bottom:20px}footer{padding:15px 20px}}@media(max-width:768px){body{justify-content:flex-start;overflow-y:auto;background-position:center;background-attachment:scroll;background-color:#fff}body:before{-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#ffffff8c}header{flex-direction:column;justify-content:center;text-align:center;padding:16px 20px;gap:12px;align-items:center}.logo-area{justify-content:center;text-align:center}header h2{font-size:1.2rem}.nav-toggle{display:block}nav{display:flex;flex-direction:column;justify-content:center;align-items:center;margin-left:0;gap:15px;width:100%;position:absolute;top:100%;left:0;background:#fffffffa;box-shadow:0 10px 20px #0000001a;padding:20px;opacity:0;visibility:hidden;transform:translateY(-10px);transition:all .3s ease;z-index:-1;box-sizing:border-box}nav.open{opacity:1;visibility:visible;transform:translateY(0)}nav a{width:100%;text-align:center;margin:0;font-size:1rem;padding:12px;border-bottom:1px solid #f0f0f0;box-sizing:border-box}nav a:last-child{border-bottom:none}#welcome-screen h1{font-size:2.4rem;letter-spacing:1px;padding:0 20px}#welcome-screen .welcome-logo{width:130px}.login-section{padding:160px 20px 40px}.login-container{padding:28px 25px;max-width:92%}.login-container .main-logo{height:90px;margin-bottom:12px}.login-container h3{font-size:.95rem}.login-container form input{padding:13px;font-size:.9rem}.login-container form button{padding:14px;font-size:1rem}.register-btn{padding:10px 24px;font-size:.9rem}.toast{right:10px;left:10px;top:15px;font-size:.9rem;text-align:center}footer{flex-direction:column;text-align:center;gap:10px;padding:15px 10px;font-size:.75rem}}@media(max-width:480px){#welcome-screen h1{font-size:1.9rem}.login-container{padding:22px 18px}.login-container form input{font-size:.85rem}.login-container form button{font-size:.95rem;padding:12px}.register-btn{padding:10px 20px;font-size:.85rem}footer{font-size:.7rem;padding:12px}}