*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
body{font-family:'Microsoft YaHei','PingFang SC',sans-serif;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);min-height:100vh;overflow-x:hidden;-webkit-font-smoothing:antialiased}
#app{min-height:100vh}
.login-container{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:20px}
.login-box{background:rgba(255,255,255,0.95);border-radius:20px;padding:40px;width:100%;max-width:400px;box-shadow:0 20px 60px rgba(0,0,0,0.3);text-align:center;animation:slideUp 0.6s ease}
@keyframes slideUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.login-logo{width:80px;height:80px;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:50%;margin:0 auto 20px;display:flex;align-items:center;justify-content:center;font-size:36px;color:white}
.login-box h1{color:#333;margin-bottom:8px;font-size:24px}
.login-box .subtitle{color:#888;margin-bottom:30px;font-size:14px}
.input-group{margin-bottom:20px;text-align:left}
.input-group label{display:block;margin-bottom:8px;color:#555;font-size:14px;font-weight:500}
.input-group input,.input-group select{width:100%;padding:14px 16px;border:2px solid #e0e0e0;border-radius:12px;font-size:16px;transition:all 0.3s;outline:none;-webkit-appearance:none;background:white}
.input-group input:focus,.input-group select:focus{border-color:#667eea;box-shadow:0 0 0 4px rgba(102,126,234,0.1)}
.btn-login{width:100%;padding:14px;background:linear-gradient(135deg,#667eea,#764ba2);color:white;border:none;border-radius:12px;font-size:16px;font-weight:600;cursor:pointer;transition:all 0.3s;margin-top:10px;-webkit-appearance:none}
.btn-login:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(102,126,234,0.4)}
.error-msg{color:#e74c3c;font-size:14px;margin-top:12px;display:none;animation:shake 0.5s}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-10px)}75%{transform:translateX(10px)}}
.login-tabs{display:flex;gap:10px;margin-bottom:25px}
.login-tab{flex:1;padding:10px;background:#f0f0f0;border:none;border-radius:10px;cursor:pointer;font-size:14px;transition:all 0.3s;font-weight:600;-webkit-appearance:none}
.login-tab.active{background:linear-gradient(135deg,#667eea,#764ba2);color:white}
.home-container{min-height:100vh;padding-bottom:30px}
.header{background:rgba(255,255,255,0.95);padding:15px 20px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 2px 20px rgba(0,0,0,0.1);position:sticky;top:0;z-index:100}
.header-left{display:flex;align-items:center;gap:10px}
.header-logo{width:36px;height:36px;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:50%;display:flex;align-items:center;justify-content:center;color:white;font-size:18px}
.header-title{font-size:16px;color:#333;font-weight:600}
.user-info{display:flex;align-items:center;gap:10px}
.user-name{color:#667eea;font-weight:600;font-size:14px}
.btn-logout{padding:6px 12px;background:#f0f0f0;border:none;border-radius:8px;color:#666;cursor:pointer;font-size:13px;transition:all 0.3s;-webkit-appearance:none}
.welcome-section{text-align:center;padding:30px 20px 15px;color:white}
.welcome-section h2{font-size:22px;margin-bottom:8px}
.welcome-section p{font-size:14px;opacity:0.9}
.nav-tabs{display:flex;justify-content:center;gap:10px;padding:15px;flex-wrap:wrap}
.nav-tab{padding:8px 20px;background:rgba(255,255,255,0.9);border:none;border-radius:20px;cursor:pointer;font-size:14px;font-weight:600;transition:all 0.3s;-webkit-appearance:none}
.nav-tab.active{background:linear-gradient(135deg,#667eea,#764ba2);color:white}
.toast{position:fixed;top:60px;left:50%;transform:translateX(-50%);padding:10px 20px;border-radius:8px;color:white;font-weight:600;z-index:1000;display:none;animation:toastSlide 0.3s;max-width:90%;text-align:center;font-size:14px}
.toast.success{background:#2ecc71}
.toast.error{background:#e74c3c}
.toast.info{background:#3498db}
@keyframes toastSlide{from{opacity:0;transform:translateX(-50%) translateY(-20px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}
.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.5);display:none;justify-content:center;align-items:center;z-index:1000;padding:20px}
.modal-overlay.show{display:flex}
.modal-box{background:white;border-radius:20px;padding:30px;text-align:center;max-width:400px;width:100%;animation:modalPop 0.3s;max-height:90vh;overflow-y:auto}
@keyframes modalPop{from{opacity:0;transform:scale(0.8)}to{opacity:1;transform:scale(1)}}
.modal-icon{font-size:48px;margin-bottom:15px}
.modal-box h3{color:#333;margin-bottom:10px;font-size:18px}
.btn-modal{padding:10px 25px;background:linear-gradient(135deg,#667eea,#764ba2);color:white;border:none;border-radius:10px;font-size:15px;cursor:pointer;transition:all 0.3s;-webkit-appearance:none;margin:5px}
.btn-modal:hover{transform:translateY(-2px);box-shadow:0 5px 15px rgba(102,126,234,0.4)}
.btn-secondary{background:#f0f0f0;color:#666}
.grade-selector{text-align:center;padding:10px 15px}
.grade-selector>div{display:inline-flex;align-items:center;gap:10px;background:rgba(255,255,255,0.9);padding:8px 20px;border-radius:25px}
.share-section{text-align:center;padding:15px}
.share-btn{padding:10px 25px;background:linear-gradient(135deg,#667eea,#764ba2);color:white;border:none;border-radius:25px;font-size:14px;font-weight:600;cursor:pointer;transition:all 0.3s;margin:5px;-webkit-appearance:none}
.share-url{background:#f0f0f0;padding:10px 15px;border-radius:8px;font-size:13px;color:#666;margin:10px auto;max-width:400px;word-break:break-all}
.pending-notice{background:#fff3e0;border:2px solid #ff9800;border-radius:12px;padding:15px;text-align:center;color:#e65100;font-size:14px;margin:20px auto;max-width:500px}