:root{--primary: #0088cc;--primary-light: #e3f2fd;--bg: #f5f7fa;--card: #ffffff;--text: #1a1a2e;--text-light: #666;--border: #e0e0e0;--success: #4caf50;--warning: #ff9800;--danger: #f44336;--radius: 12px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased}.app{min-height:100vh;padding-bottom:70px}.page{padding:16px;max-width:480px;margin:0 auto}.loading{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;gap:12px}.spinner{width:36px;height:36px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.bottom-nav{position:fixed;bottom:0;left:0;right:0;display:flex;background:var(--card);border-top:1px solid var(--border);padding:6px 0 env(safe-area-inset-bottom,8px);z-index:100}.bottom-nav button{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;background:none;border:none;padding:6px 0;cursor:pointer;color:var(--text-light);font-size:11px}.bottom-nav button.active{color:var(--primary)}.nav-icon{font-size:20px}.hero-card{background:linear-gradient(135deg,var(--primary),#005fa3);color:#fff;padding:24px;border-radius:var(--radius);margin-bottom:16px}.hero-card h1{font-size:22px;margin-bottom:4px}.hero-card .subtitle{opacity:.85;font-size:14px}.info-card,.progress-card,.referral-card,.payment-info{background:var(--card);padding:16px;border-radius:var(--radius);margin-bottom:16px;box-shadow:0 1px 3px #00000014}.info-row{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--border)}.info-row:last-child{border-bottom:none}.section{margin-bottom:20px}.section h3{font-size:16px;margin-bottom:12px;color:var(--text)}.empty{color:var(--text-light);text-align:center;padding:24px}.quick-actions{margin-bottom:16px}.quick-actions h3{margin-bottom:12px}.action-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.action-btn{display:flex;flex-direction:column;align-items:center;gap:6px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:16px 8px;cursor:pointer;font-size:13px;transition:all .2s}.action-btn:hover{border-color:var(--primary);background:var(--primary-light)}.action-icon{font-size:28px}.form-section{margin-bottom:20px}.form-section h3{margin-bottom:16px}.form-group{margin-bottom:14px}.form-group label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--text-light)}.form-group input{width:100%;padding:12px;border:1px solid var(--border);border-radius:8px;font-size:15px;outline:none;transition:border-color .2s}.form-group input:focus{border-color:var(--primary)}.type-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.type-btn{display:flex;flex-direction:column;align-items:center;gap:8px;background:var(--card);border:2px solid var(--border);border-radius:var(--radius);padding:16px 8px;cursor:pointer;font-size:13px;transition:all .2s}.type-btn.active,.type-btn:hover{border-color:var(--primary);background:var(--primary-light)}.type-icon{font-size:32px}.gender-btns{display:flex;gap:10px}.gender-btns button{flex:1;padding:10px;border:2px solid var(--border);border-radius:8px;background:var(--card);cursor:pointer;font-size:14px;transition:all .2s}.gender-btns button.active{border-color:var(--primary);background:var(--primary-light)}.btn-primary{width:100%;padding:14px;background:var(--primary);color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:opacity .2s}.btn-primary:hover{opacity:.9}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.error-text{color:var(--danger);font-size:13px;margin-bottom:8px}.session-card{background:var(--card);padding:12px;border-radius:8px;margin-bottom:8px;border-left:4px solid var(--primary);box-shadow:0 1px 2px #0000000f}.session-date{font-weight:600;margin-bottom:4px}.session-pool{font-size:13px;color:var(--text-light)}.session-status{font-size:12px;margin-top:4px}.btn-cancel{margin-top:8px;padding:6px 16px;background:none;color:var(--danger);border:1px solid var(--danger);border-radius:6px;font-size:12px;cursor:pointer}.day-group{margin-bottom:16px}.day-group h4{font-size:14px;margin-bottom:8px;color:var(--primary)}.slot-list{display:flex;flex-wrap:wrap;gap:8px}.slot-btn{display:flex;flex-direction:column;padding:10px 14px;background:var(--card);border:1px solid var(--primary);border-radius:8px;color:var(--primary);cursor:pointer;font-size:14px;font-weight:500;transition:all .2s}.slot-btn:hover{background:var(--primary);color:#fff}.slot-btn small{font-size:11px;opacity:.7}.progress-bar{height:10px;background:var(--border);border-radius:5px;overflow:hidden;margin:12px 0}.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--success));border-radius:5px;transition:width .5s}.progress-text{font-size:13px;color:var(--text-light);margin-bottom:12px}.skills-list{display:flex;flex-direction:column;gap:6px}.skill-item{font-size:13px;padding:6px 0}.skill-item.achieved{font-weight:600}.payment-methods{display:flex;flex-direction:column;gap:8px}.method{font-size:14px;padding:8px;background:var(--bg);border-radius:6px}.payment-card{background:var(--card);padding:12px;border-radius:8px;margin-bottom:8px;border-left:4px solid var(--border);box-shadow:0 1px 2px #0000000f}.payment-card.confirmed{border-left-color:var(--success)}.payment-card.pending{border-left-color:var(--warning)}.payment-card.overdue{border-left-color:var(--danger)}.payment-course{font-weight:600;margin-bottom:4px}.payment-amount{font-size:18px;font-weight:700;color:var(--primary)}.payment-status{font-size:12px;margin-top:4px}.payment-method{font-size:12px;color:var(--text-light)}.code-box{display:flex;align-items:center;justify-content:space-between;background:var(--primary-light);padding:16px;border-radius:8px;margin:12px 0;cursor:pointer;border:2px dashed var(--primary)}.code{font-size:24px;font-weight:700;color:var(--primary);letter-spacing:2px}.copy-btn{font-size:13px;color:var(--primary)}.referral-count{font-size:14px;color:var(--text-light)}.referral-benefits{background:var(--card);padding:16px;border-radius:var(--radius)}.referral-benefits ul{list-style:none;padding:0}.referral-benefits li{padding:6px 0;font-size:14px}.referral-benefits li:before{content:"✅ "}