:root{--primary: #007aff;--success: #34c759;--danger: #ff3b30;--warning: #ff9500;--background: #f2f2f7;--card: #ffffff;--text: #1c1c1e;--text-secondary: #8e8e93;--border: #e5e5ea}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--background);color:var(--text);line-height:1.5;min-height:100vh;overflow-x:hidden}.container{max-width:600px;margin:0 auto;padding:20px}h1,h2,h3{font-weight:600;margin-bottom:10px}h1{font-size:28px;text-align:center;margin-bottom:30px}.card{background:var(--card);border-radius:12px;padding:20px;margin-bottom:20px;box-shadow:0 2px 10px #0000000d}.form-group{margin-bottom:20px}label{display:block;font-weight:500;margin-bottom:8px;color:var(--text-secondary);font-size:14px;text-transform:uppercase;letter-spacing:.5px}textarea{width:100%;padding:12px;border:1px solid var(--border);border-radius:8px;font-size:16px;font-family:inherit;resize:vertical;min-height:100px}textarea:focus{outline:none;border-color:var(--primary)}button{background:var(--primary);color:#fff;border:none;padding:12px 24px;border-radius:8px;font-size:16px;font-weight:500;cursor:pointer;transition:transform .1s,box-shadow .2s}button:active{transform:scale(.98)}button:disabled{background:var(--text-secondary);cursor:not-allowed}.btn-secondary{background:var(--text-secondary)}.btn-success{background:var(--success);width:100%;padding:16px;font-size:18px;margin-top:20px}.btn-danger{background:var(--danger)}#quick-plans{display:grid;gap:10px;margin-bottom:20px}.quick-plan-btn{background:var(--background);color:var(--text);text-align:left;padding:15px;border:1px solid var(--border);transition:background .2s,border-color .2s}.quick-plan-btn:hover{background:var(--card);border-color:var(--primary)}.week-name{font-weight:600;margin-bottom:5px}.plan-description{font-size:14px;color:var(--text-secondary)}#heart-rate-info{background:var(--card);border-radius:12px;padding:20px;margin-bottom:20px}#heart-rate-info h3{margin-bottom:15px}.heart-rate-zone{display:flex;justify-content:space-between;padding:10px;margin-bottom:5px;border-radius:6px;font-size:14px}.heart-rate-zone.warmup{background:#34c7591a;color:var(--success)}.heart-rate-zone.work{background:#007aff1a;color:var(--primary)}.heart-rate-zone.caution{background:#ff95001a;color:var(--warning)}.heart-rate-zone.stop{background:#ff3b301a;color:var(--danger)}.schedule-info{margin-top:20px;padding-top:20px;border-top:1px solid var(--border)}.schedule-info p{margin-bottom:8px;font-size:14px}#plan-preview{margin:20px 0}.phase-item{padding:10px;margin-bottom:5px;border-radius:6px;background:var(--background);border-left:4px solid transparent}.phase-item.run{border-left-color:var(--primary)}.phase-item.walk{border-left-color:var(--success)}#workout-summary{text-align:center;font-size:18px;color:var(--text-secondary);margin:20px 0}.workout-screen{min-height:calc(100vh - 40px);display:flex;flex-direction:column}.workout-header{flex-shrink:0}.workout-main{flex:1;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:40px 20px}.phase-name{font-size:36px;font-weight:700;margin-bottom:20px;text-align:center}.phase-name.run{color:var(--primary)}.phase-name.walk{color:var(--success)}.phase-timer{font-size:72px;font-weight:300;font-feature-settings:"tnum";margin-bottom:40px}.progress-bar{width:100%;height:8px;background:var(--border);border-radius:4px;overflow:hidden;margin-bottom:20px}.progress-fill{height:100%;background:var(--primary);transition:width 1s linear}.total-time{font-size:18px;color:var(--text-secondary);margin-bottom:40px}.workout-controls{display:flex;gap:20px;width:100%;max-width:300px}.workout-controls button{flex:1}.recovery-screen{text-align:center;padding:40px 20px;min-height:calc(100vh - 40px);display:flex;flex-direction:column;justify-content:center}.recovery-icon{font-size:72px;margin-bottom:20px}#final-time{font-size:48px;font-weight:300;margin:20px 0}.recovery-tips{background:var(--card);border-radius:12px;padding:20px;margin:30px 0;text-align:left}.recovery-tips h3{margin-bottom:15px}.recovery-tips ul{list-style:none;padding:0}.recovery-tips li{padding:10px 0;border-bottom:1px solid var(--border)}.recovery-tips li:last-child{border-bottom:none}.recovery-tips li:before{content:"✓ ";color:var(--success);font-weight:700;margin-right:8px}.hidden{display:none!important}@media(max-width:375px){.phase-timer{font-size:60px}.phase-name{font-size:28px}h1{font-size:24px}}@media(display-mode:standalone){body{padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom)}}