:root{--primary: #007AFF;--primary-dark: #0056CC;--success: #34C759;--warning: #FF9500;--danger: #FF3B30;--gray-50: #F5F5F7;--gray-100: #E5E5EA;--gray-200: #D1D1D6;--gray-300: #C7C7CC;--gray-400: #AEAEB2;--gray-500: #8E8E93;--gray-600: #636366;--gray-700: #48484A;--gray-800: #3A3A3C;--gray-900: #1C1C1E;--white: #FFFFFF;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,SF Pro Display,sans-serif;background:var(--gray-50);color:var(--gray-900);line-height:1.5;-webkit-font-smoothing:antialiased}.app{min-height:100vh}.navbar{position:sticky;top:0;z-index:100;background:#fffc;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--gray-100);padding:0 24px;height:60px;display:flex;align-items:center;justify-content:space-between}.navbar-brand{font-size:20px;font-weight:600;color:var(--gray-900)}.navbar-nav{display:flex;gap:24px}.nav-link{color:var(--gray-600);text-decoration:none;font-size:14px;font-weight:500;transition:color .2s}.nav-link:hover,.nav-link.active{color:var(--primary)}.container{max-width:1200px;margin:0 auto;padding:24px}.card{background:var(--white);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:24px;margin-bottom:16px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:var(--radius-md);font-size:14px;font-weight:500;border:none;cursor:pointer;transition:all .2s}.btn-primary{background:var(--primary);color:var(--white)}.btn-primary:hover{background:var(--primary-dark)}.btn-secondary{background:var(--gray-100);color:var(--gray-900)}.btn-secondary:hover{background:var(--gray-200)}.btn-success{background:var(--success);color:var(--white)}.input{width:100%;padding:12px 16px;border:1px solid var(--gray-200);border-radius:var(--radius-md);font-size:14px;transition:border-color .2s}.input:focus{outline:none;border-color:var(--primary)}.form-group{margin-bottom:16px}.form-label{display:block;font-size:14px;font-weight:500;color:var(--gray-700);margin-bottom:8px}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2)}.auth-card{background:var(--white);border-radius:var(--radius-lg);padding:48px;width:100%;max-width:400px;box-shadow:var(--shadow-lg)}.auth-title{font-size:28px;font-weight:600;text-align:center;margin-bottom:8px}.auth-subtitle{font-size:14px;color:var(--gray-500);text-align:center;margin-bottom:32px}.test-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}.test-card{background:var(--white);border-radius:var(--radius-lg);padding:24px;cursor:pointer;transition:all .2s;border:2px solid transparent}.test-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--primary)}.test-card-title{font-size:18px;font-weight:600;margin-bottom:8px}.test-card-meta{font-size:14px;color:var(--gray-500)}.question-list{display:flex;flex-direction:column;gap:12px}.question-item{background:var(--white);border-radius:var(--radius-md);padding:16px 20px;display:flex;align-items:center;justify-content:space-between;cursor:pointer;transition:all .2s;border:1px solid var(--gray-100)}.question-item:hover{border-color:var(--primary);background:#007aff05}.question-type{display:inline-block;padding:4px 10px;border-radius:20px;font-size:12px;font-weight:500}.question-type.listen{background:#007aff1a;color:var(--primary)}.question-type.interview{background:#34c7591a;color:var(--success)}.practice-container{max-width:800px;margin:0 auto}.audio-player{background:var(--gray-900);border-radius:var(--radius-lg);padding:24px;margin-bottom:24px}.record-btn{width:80px;height:80px;border-radius:50%;background:var(--danger);border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;margin:0 auto;transition:all .2s}.record-btn:hover{transform:scale(1.05)}.record-btn.recording{animation:pulse 1s infinite}@keyframes pulse{0%,to{box-shadow:0 0 #ff3b3066}50%{box-shadow:0 0 0 20px #ff3b3000}}.score-display{text-align:center;padding:32px}.score-number{font-size:72px;font-weight:700;color:var(--primary)}.score-label{font-size:14px;color:var(--gray-500);margin-top:8px}.materials-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px}.material-section{background:var(--gray-50);border-radius:var(--radius-md);padding:16px}.material-title{font-size:14px;font-weight:600;color:var(--gray-700);margin-bottom:12px}.material-item{font-size:13px;padding:8px 0;border-bottom:1px solid var(--gray-200)}.material-item:last-child{border-bottom:none}.followup-chat{margin-top:24px}.chat-messages{max-height:400px;overflow-y:auto}.chat-message{padding:12px 16px;border-radius:var(--radius-md);margin-bottom:12px}.chat-message.user{background:var(--primary);color:var(--white);margin-left:40px}.chat-message.assistant{background:var(--gray-100);color:var(--gray-900);margin-right:40px}.history-list{display:flex;flex-direction:column;gap:12px}.history-item{background:var(--white);border-radius:var(--radius-md);padding:16px;display:flex;justify-content:space-between;align-items:center}.history-info h4{font-size:16px;font-weight:500;margin-bottom:4px}.history-meta{font-size:12px;color:var(--gray-500)}.history-score{font-size:24px;font-weight:600;color:var(--primary)}.loading{display:flex;align-items:center;justify-content:center;padding:48px}.spinner{width:40px;height:40px;border:3px solid var(--gray-200);border-top-color:var(--primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.tab-nav{display:flex;gap:8px;margin-bottom:24px}.tab-btn{padding:8px 16px;border:none;background:transparent;font-size:14px;font-weight:500;color:var(--gray-500);cursor:pointer;border-bottom:2px solid transparent}.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary)}.ai-analyzing{position:relative;width:80px;height:80px;margin:0 auto}.ai-icon{width:60px;height:60px;background:linear-gradient(135deg,#007aff,#5856d6);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:28px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:2}.ai-pulse-ring{position:absolute;top:50%;left:50%;width:60px;height:60px;border:2px solid #007AFF;border-radius:50%;transform:translate(-50%,-50%);animation:pulse-ring 2s ease-out infinite;opacity:0}@keyframes pulse-ring{0%{width:60px;height:60px;opacity:.8;border-color:#007aff}to{width:120px;height:120px;opacity:0;border-color:#5856d6}}.admin-container{display:flex;min-height:100vh;background:#f5f5f7}.admin-sidebar{width:240px;background:linear-gradient(180deg,#1c1c1e,#2c2c2e);color:#fff;padding:20px 0;position:fixed;height:100vh;left:0;top:0}.admin-logo{font-size:20px;font-weight:700;padding:0 20px 30px;color:#007aff;border-bottom:1px solid rgba(255,255,255,.1);margin-bottom:20px}.admin-nav{display:flex;flex-direction:column;gap:4px;padding:0 12px}.admin-nav .nav-item{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:8px;background:transparent;color:#ffffffb3;border:none;cursor:pointer;font-size:14px;transition:all .2s;text-align:left}.admin-nav .nav-item:hover{background:#ffffff1a;color:#fff}.admin-nav .nav-item.active{background:#007aff;color:#fff}.admin-content{flex:1;margin-left:240px;padding:32px}.admin-content h1{font-size:28px;font-weight:600;margin-bottom:24px;color:#1c1c1e}.stats-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:24px}.stat-card{background:#fff;border-radius:16px;padding:24px;display:flex;align-items:center;gap:16px;box-shadow:0 2px 8px #0000000f}.stat-icon{color:#007aff}.stat-value{font-size:28px;font-weight:700;color:#1c1c1e}.stat-label{font-size:13px;color:#8e8e93}.charts-row{display:grid;grid-template-columns:2fr 1fr;gap:20px}.chart-card{background:#fff;border-radius:16px;padding:24px;box-shadow:0 2px 8px #0000000f}.chart-card h3{font-size:16px;font-weight:600;margin-bottom:20px;color:#1c1c1e}.admin-table-container{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 2px 8px #0000000f}.admin-table{width:100%;border-collapse:collapse}.admin-table th{background:#f5f5f7;padding:14px 16px;text-align:left;font-size:13px;font-weight:600;color:#8e8e93;border-bottom:1px solid #e5e5ea}.admin-table td{padding:14px 16px;font-size:14px;color:#1c1c1e;border-bottom:1px solid #e5e5ea}.admin-table tr:last-child td{border-bottom:none}.admin-table tr:hover{background:#fafafa}.role-select{padding:6px 12px;border-radius:6px;border:1px solid #e5e5ea;background:#fff;font-size:13px;cursor:pointer}.btn-delete{padding:6px 12px;border-radius:6px;border:none;background:#ff3b30;color:#fff;font-size:13px;cursor:pointer;transition:background .2s}.btn-delete:hover{background:#d63027}.posts-list{display:flex;flex-direction:column;gap:16px}.post-item{background:#fff;border-radius:16px;padding:20px;box-shadow:0 2px 8px #0000000f}.post-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.post-date{font-size:13px;color:#8e8e93}.post-content{font-size:14px;line-height:1.6;color:#1c1c1e;margin-bottom:12px}.post-actions{display:flex;align-items:center;gap:16px;font-size:13px;color:#8e8e93}.post-actions button{margin-left:auto}.btn-view{padding:6px 12px;border-radius:6px;border:none;background:#007aff;color:#fff;font-size:13px;cursor:pointer;display:inline-flex;align-items:center;gap:4px;transition:background .2s}.btn-view:hover{background:#0056b3}.modal-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal-content{background:#fff;border-radius:16px;width:90%;max-width:600px;max-height:80vh;overflow-y:auto}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:20px;border-bottom:1px solid #e5e5ea}.modal-header h2{margin:0;font-size:18px}.btn-close{background:none;border:none;cursor:pointer;padding:4px}.modal-body{padding:20px}.modal-body h3{margin:20px 0 10px;font-size:16px}.records-list{display:flex;flex-direction:column;gap:8px}.record-item{display:flex;justify-content:space-between;align-items:center;padding:10px;background:#f5f5f7;border-radius:8px;font-size:13px}.record-item span:first-child{flex:1}
