:root{--primary-blue: #00BFFF;--accent-yellow: #FFC801;--white: #FFFFFF;--bg-color: #f0f4f8;--text-color: #333;--bubble-received: #FFFFFF;--bubble-sent: #dcf8c6;--bubble-sent-bg: var(--primary-blue);--bubble-sent-text: var(--white);--bubble-received-bg: var(--white);--bubble-received-text: var(--text-color)}html{height:100%;height:100dvh;width:100%}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Nunito,sans-serif;background-color:var(--bg-color);color:var(--text-color);line-height:1.5;height:100%;height:100dvh;width:100%;overflow:hidden;display:flex;justify-content:center}#app{width:100%;height:100%;height:100dvh;background-color:var(--white);position:relative;display:flex;flex-direction:column}button{font-family:inherit;cursor:pointer;border:none;transition:all .3s ease}input{font-family:inherit;border-radius:8px;border:1px solid #ddd;padding:10px;outline:none}.login-wrapper{display:flex;align-items:center;justify-content:center;height:100%;width:100%;background-color:var(--bg-color);padding:20px}.login-card{background:var(--white);padding:40px 30px;border-radius:30px;width:100%;max-width:380px;box-shadow:0 15px 35px #0000001a;text-align:center;animation:fadeIn .6s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.login-header{margin-bottom:35px}.login-logo-img{width:100px;height:auto;margin-bottom:15px}.login-header h1{font-size:24px;color:var(--text-color);font-weight:800;margin-bottom:5px}.login-header p{font-size:14px;color:#777}.login-form-modern{display:flex;flex-direction:column;gap:20px;text-align:left}.input-field{display:flex;flex-direction:column;gap:8px}.input-field label{font-size:13px;font-weight:700;color:var(--text-color);margin-left:5px}.input-field input{padding:14px 18px;background:#f8f9fb;border:1px solid #edf2f7;border-radius:12px;font-size:15px;color:var(--text-color);transition:all .3s ease}.input-field input:focus{background:var(--white);border-color:var(--primary-blue);box-shadow:0 0 0 3px #00bfff1a}.login-submit-btn{margin-top:10px;padding:16px;background-color:var(--primary-blue);color:var(--white);font-size:16px;font-weight:800;letter-spacing:1px;border-radius:12px;box-shadow:0 8px 15px #00bfff40;transition:all .3s ease}.login-submit-btn:hover{transform:translateY(-2px);box-shadow:0 10px 20px #00bfff4d;filter:brightness(1.1)}.login-footer{margin-top:30px;font-size:14px;color:#777}.login-footer span{color:var(--primary-blue);font-weight:700;cursor:pointer}.chat-page{display:flex;flex-direction:column;height:100%;background-color:#f8f9fb;animation:pageFadeIn .8s ease-out}@keyframes pageFadeIn{0%{opacity:0}to{opacity:1}}.chat-header{background-color:var(--primary-blue);color:var(--white);padding:15px 20px;display:flex;align-items:center;justify-content:space-between;box-shadow:0 4px 12px #00bfff26;z-index:100;border-bottom:1px solid rgba(255,255,255,.1)}.header-info{display:flex;align-items:center;gap:12px}.header-avatar{width:44px;height:44px;border-radius:50%;background:#fff;display:flex;justify-content:center;align-items:center;box-shadow:0 4px 8px #0000001a;overflow:hidden;padding:4px}.header-logo-img{width:100%;height:100%;object-fit:contain}.header-text h2{font-size:17px;font-weight:800;margin:0;letter-spacing:.3px}.header-text .status{font-size:12px;opacity:.9;font-weight:600;display:flex;align-items:center;gap:5px}.header-text .status:before{content:"";display:block;width:8px;height:8px;background:#4ade80;border-radius:50%;box-shadow:0 0 10px #4ade80}.header-left{display:flex;align-items:center;gap:15px}.back-btn{background:transparent;color:#fff;width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;padding:0}.back-btn:hover{background:#fff3}.logout-btn{background:#ffffff26;color:#fff;width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center}.logout-btn:hover{background:#ffffff40;transform:scale(1.05)}.chat-messages{flex:1;overflow-y:auto;padding:25px 20px;display:flex;flex-direction:column;gap:20px;scroll-behavior:smooth}.message{max-width:85%;display:flex;flex-direction:column;animation:messageSlideUp .4s cubic-bezier(.18,.89,.32,1.28) forwards}@keyframes messageSlideUp{0%{opacity:0;transform:translateY(15px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}.message.sent{align-self:flex-end;align-items:flex-end}.message.received{align-self:flex-start;align-items:flex-start}.bubble{padding:14px 20px;border-radius:20px;font-size:17px;line-height:1.45;font-weight:500;box-shadow:0 2px 10px #00000008;word-wrap:break-word;display:flex;flex-direction:column}.message-sender{display:block;font-size:13px;font-weight:800;margin-bottom:4px;color:var(--primary-blue);letter-spacing:.5px}.message.sent .bubble{background-color:var(--primary-blue);color:var(--white);border-bottom-right-radius:4px;box-shadow:0 4px 12px #00bfff33}.message.received .bubble{background-color:var(--white);color:var(--text-color);border-bottom-left-radius:4px}.time{font-size:11px;color:#999;margin-top:6px;font-weight:600}.chat-input-area{background-color:var(--white);padding:20px;display:flex;align-items:center;border-top:1px solid #edf2f7;padding-bottom:calc(20px + env(safe-area-inset-bottom,0px))}#chat-form{display:flex;width:100%;gap:12px;background:#f8f9fb;padding:8px 8px 8px 20px;border-radius:20px;border:1px solid #edf2f7;transition:all .3s ease}#chat-form:focus-within{border-color:var(--primary-blue);background:var(--white);box-shadow:0 4px 15px #00bfff1a}#message-input{flex:1;padding:10px 0;border:none;background:transparent;font-size:15px;color:var(--text-color);font-weight:500}#message-input::placeholder{color:#adb5bd}.send-btn{background-color:var(--primary-blue);color:#fff;width:44px;height:44px;border-radius:16px;display:flex;justify-content:center;align-items:center;box-shadow:0 4px 10px #00bfff4d}.send-btn:hover{transform:scale(1.05) translateY(-2px);box-shadow:0 6px 15px #00bfff66}.send-btn svg{transform:rotate(45deg);margin-right:-4px}.redactar-btn{width:100%;background-color:var(--primary-blue);color:#fff;padding:16px;border-radius:12px;font-size:16px;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;display:flex;justify-content:center;align-items:center;transition:all .3s cubic-bezier(.175,.885,.32,1.275)}.redactar-btn:hover{transform:translateY(-3px) scale(1.02);filter:brightness(1.1)}.redactar-btn:active{transform:translateY(0) scale(.98)}:root{--teacher-primary: var(--primary-blue);--teacher-bg: rgba(255, 255, 255, .95);--teacher-bubble-sent: var(--primary-blue);--teacher-bubble-received: #f1f5f9}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#0f172a99;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:none;z-index:1000;align-items:center;justify-content:center;padding:20px;animation:fadeIn .3s ease}.modal-overlay.active{display:flex}.drafting-card{background:var(--white);width:100%;max-width:500px;height:85vh;border-radius:24px;display:flex;flex-direction:column;box-shadow:0 25px 50px -12px #00000040;overflow:hidden;animation:slideUp .4s cubic-bezier(.165,.84,.44,1);position:relative}@keyframes slideUp{0%{transform:translateY(50px);opacity:0}to{transform:translateY(0);opacity:1}}.modal-header{padding:20px;background-color:var(--teacher-primary);color:#fff;display:flex;justify-content:space-between;align-items:center}.modal-header h3{margin:0;font-size:18px;font-weight:700}.close-modal{background:#fff3;color:#fff;width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:20px}.teacher-chat-body{flex:1;overflow-y:auto;padding:20px;background:#fdfdfd;display:flex;flex-direction:column;gap:15px}.teacher-bubble{padding:14px 20px;border-radius:18px;font-size:17px;max-width:85%;line-height:1.45;font-weight:500}.teacher-bubble.sent{background-color:var(--teacher-bubble-sent);color:#fff;align-self:flex-end;border-bottom-right-radius:4px}.feedback-list{margin:0;padding-left:20px}.feedback-list li{margin-bottom:12px;line-height:1.5}.feedback-list li:last-child{margin-bottom:0}.teacher-bubble.received{background-color:var(--teacher-bubble-received);color:#1e293b;align-self:flex-start;border-bottom-left-radius:4px}.modal-footer{padding:15px 20px;border-top:1px solid #f1f5f9;background:#fff;display:flex;flex-direction:column;gap:12px}#teacher-input-form{position:relative;display:flex;align-items:center}#teacher-input{width:100%;padding:14px 60px 14px 18px;border-radius:24px;border:1px solid #e2e8f0;font-size:15px;outline:none;font-weight:500;background:#f8f9fa;box-shadow:inset 0 2px 4px #00000005}#teacher-input:focus{border-color:var(--teacher-primary);background:#fff;box-shadow:0 0 0 4px #00bfff1a}.teacher-send-btn{position:absolute;right:6px;top:50%;transform:translateY(-50%);background:var(--teacher-primary);color:#fff;width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 6px #00bfff4d;transition:all .2s ease}.teacher-send-btn:hover{transform:translateY(-50%) scale(1.05)}.teacher-send-btn:active{transform:translateY(-50%) scale(.95)}.teacher-send-btn.success{background:#10b981;box-shadow:0 4px 12px #10b98166;transform:translateY(-50%) scale(1.1)}.teacher-send-btn.success:hover{transform:translateY(-50%) scale(1.15);box-shadow:0 6px 16px #10b98180}.groups-page{width:100%;height:100%;display:flex;flex-direction:column;background-color:var(--bg-color)}.groups-content{flex:1;display:flex;justify-content:center;align-items:center;padding:20px}.groups-card{background:var(--white);padding:40px;border-radius:30px;width:100%;max-width:450px;box-shadow:0 15px 35px #0000001a;display:flex;flex-direction:column;align-items:center;animation:fadeIn .6s ease-out}.groups-header{margin-bottom:30px;text-align:center}.groups-logo-img{width:80px;height:auto;margin-bottom:15px}.groups-header h2{font-size:24px;font-weight:800;color:var(--text-color);margin-bottom:8px}.groups-header p{color:#777;font-size:14px}.group-list{width:100%;display:flex;flex-direction:column;gap:15px;margin-bottom:20px}.group-item-btn{width:100%;padding:18px 24px;background:#f8f9fb;border:1px solid #edf2f7;border-radius:16px;display:flex;justify-content:space-between;align-items:center;transition:all .3s ease;text-align:left}.group-item-btn:hover{background:var(--white);border-color:var(--primary-blue);box-shadow:0 8px 20px #00bfff26;transform:translateY(-2px)}.group-name{font-size:17px;font-weight:700;color:var(--text-color);letter-spacing:.3px}.group-arrow{color:#bdc3c7;transition:all .3s ease}.group-item-btn:hover .group-arrow{color:var(--primary-blue);transform:translate(4px)}.empty-groups{text-align:center;padding:30px;color:#888;background:#f9fafb;border-radius:12px;width:100%;border:1px dashed #e2e8f0}.loading-spinner{border:4px solid rgba(0,0,0,.1);width:36px;height:36px;border-radius:50%;border-left-color:var(--primary-blue);animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.teacher-loading{display:flex;align-items:center;justify-content:center;padding:10px;gap:10px;color:#888;font-size:14px;font-weight:600;display:none}.teacher-loading.active{display:flex}.duck-loader{width:30px;height:30px;animation:duck-bounce .6s infinite alternate}@keyframes duck-bounce{0%{transform:translateY(0)}to{transform:translateY(-8px)}}.teacher-input-disabled{opacity:.6;pointer-events:none;background-color:#f1f5f9}