:root{--bg:#0b1116;--sidebar:#0e151b;--card:#131e25;--card2:#17252d;--line:#2a3940;--muted:#93a4aa;--text:#eef5ef;--lime:#c8f376;--lime2:#aee566;--purple:#bba6ee;--aqua:#76d9cf;--danger:#f4a497;--soft:#253139;--radius:19px;--shadow:0 14px 40px rgba(0,0,0,.12)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;font-size:14px;line-height:1.55}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}a{color:inherit}a:hover{text-decoration:none}::selection{background:var(--lime);color:#112019}:focus-visible{outline:2px solid var(--lime);outline-offset:3px}h1,h2,h3,p{margin:0}h1,h2,h3{letter-spacing:-.035em}h1{font-size:clamp(32px,4vw,52px);line-height:1.1;font-weight:760}h2{font-size:23px;line-height:1.25;font-weight:720}h3{font-size:17px;font-weight:680}small{font-size:11px}.shell{display:grid;grid-template-columns:254px minmax(0,1fr);min-height:100vh}.sidebar{background:var(--sidebar);border-right:1px solid #223038;padding:29px 19px;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;z-index:20}.brand{display:flex;gap:11px;align-items:center;margin:0 10px 54px}.brand-icon{background:var(--lime);width:43px;height:43px;display:grid;place-items:center;color:#0d1c16;border-radius:12px;font-size:28px;font-weight:850;line-height:1}.brand-dot{color:#5c976d}.brand-text{font-size:22px;font-weight:810;line-height:1;letter-spacing:-.06em}.brand-text>span{color:var(--lime)}.brand-text small{display:block;letter-spacing:.18em;font-size:8px;color:#778d94;margin-top:7px;font-weight:750}.side-label{font-size:10px;color:#657d84;letter-spacing:.15em;font-weight:750;margin:0 12px 18px}.side-nav{display:grid;gap:7px}.nav-link{width:100%;border:1px solid transparent;background:transparent;color:#a5b5b8;text-align:left;padding:12px 14px;border-radius:12px;display:flex;align-items:center;gap:13px;font-weight:570;transition:background .2s,color .2s}.nav-link>span{font-size:20px;line-height:1;width:24px;text-align:center;color:#91a9ab}.nav-link:hover{background:#1a2830;color:#fff}.nav-link.active{background:#273a2e;color:var(--lime);border-color:#3a5743}.nav-link.active>span{color:var(--lime)}.sidebar-bottom{margin-top:auto}.coach-card{padding:20px 15px 18px;margin-bottom:20px;border:1px solid #344941;border-radius:16px;background:linear-gradient(150deg,#20352e,#162229 80%)}.coach-icon{display:block;font-size:27px;color:var(--lime);line-height:1;margin-bottom:13px}.coach-card strong{font-size:13px}.coach-card p{color:#aebdb7;font-size:12px;margin-top:8px}.sidebar-foot{font-size:9px;color:#61787c;letter-spacing:.08em;margin:28px 13px 0}.sidebar-foot span{padding:0 7px}.main-column{min-width:0}.topbar{height:75px;border-bottom:1px solid #243139;display:flex;align-items:center;justify-content:space-between;padding:0 clamp(20px,4vw,57px)}.topbar-left,.topbar-right{display:flex;align-items:center;gap:11px}.topbar-left{font-size:10px;font-weight:800;letter-spacing:.14em;color:#80969e}.topbar-mark{color:var(--lime);font-size:21px}.topbar-right{font-size:12px;color:#92a6a9}.status-dot{width:8px;height:8px;background:var(--lime);border-radius:50%;box-shadow:0 0 0 5px #243728}.profile-circle{width:32px;height:32px;border:1px solid #4b6a61;background:#243831;border-radius:50%;color:var(--lime);display:grid;place-items:center;margin-left:15px;font-weight:800}.app-container{max-width:1360px;margin:0 auto;padding:35px clamp(20px,4vw,57px) 68px;min-height:calc(100vh - 127px)}.footer{display:flex;justify-content:space-between;padding:0 clamp(20px,4vw,57px) 22px;color:#60757b;font-size:11px}.bottom-nav{display:none}.loading{padding:60px 0;color:var(--muted)}
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.filter-row{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:18px;flex-wrap:wrap}.search-input,.field{background:#0f191f;color:var(--text);border:1px solid #3b4d54;border-radius:11px;padding:12px 13px;outline:none;min-width:0;accent-color:var(--lime)}.search-input{min-width:min(100%,280px);flex:1}.search-input::placeholder,.field::placeholder{color:#72888c}.field:focus,.search-input:focus{border-color:#a8dc7c;box-shadow:0 0 0 3px #b4ec7522}.tab-filters{display:flex;flex-wrap:wrap;gap:7px}.tab-filter{background:#1b2c31;border:1px solid #385057;border-radius:9px;padding:8px 12px;color:#9cb6b9;font-size:11px;font-weight:720}.tab-filter.active{background:#2b4434;border-color:#6b925a;color:var(--lime)}.exercise-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.exercise-list-card{background:var(--card);border:1px solid #293a41;border-radius:15px;padding:20px;display:flex;flex-direction:column;gap:10px;transition:border .2s}.exercise-list-card:hover{border-color:#67875f}.exercise-tag{display:flex;align-items:center;gap:7px;color:#95acae;font-size:11px}.exercise-head{display:flex;gap:13px;align-items:flex-start}.exercise-emoji{height:48px;width:48px;flex:none;border-radius:12px;background:#2a3c3a;display:grid;place-items:center;font-size:24px}.exercise-list-card h3{margin:1px 0 3px}.exercise-list-card .vietnamese{font-size:12px;color:#9db0b2}.exercise-specs{display:flex;flex-wrap:wrap;gap:7px;margin-top:auto}.exercise-specs .chip{padding:5px 8px;font-size:10px}.exercise-list-card .buttonrow{margin-top:5px}.detail-hero{background:linear-gradient(120deg,#1c3432,#1b242f);border:1px solid #45624d;padding:26px 29px;border-radius:18px;margin-bottom:20px}.detail-hero .detail-top{display:flex;justify-content:space-between;align-items:flex-start;gap:14px}.detail-hero h1{font-size:30px;margin:7px 0 8px}.detail-hero p{font-size:13px;color:#b4c9c4}.detail-hero .detail-stats{display:flex;gap:9px;margin-top:20px;flex-wrap:wrap}.exercise-detail-layout{display:grid;grid-template-columns:1.5fr 1fr;gap:19px}.instruction-steps{counter-reset:item;display:grid;gap:14px;margin:0;padding:0;list-style:none}.instruction-steps li{display:flex;gap:12px;align-items:flex-start;font-size:13px;color:#c4d3d2}.instruction-steps li:before{counter-increment:item;content:counter(item);width:23px;height:23px;flex:none;display:grid;place-items:center;background:#334536;color:var(--lime);border-radius:7px;font-size:11px;font-weight:750}.alternative-list{display:flex;gap:7px;flex-wrap:wrap;margin-top:12px}.alternative-list button{background:#23343c;border:1px solid #46585d;border-radius:9px;color:#b8cac8;padding:8px 10px;font-size:12px}.alternative-list button:hover{border-color:var(--lime);color:var(--lime)}
.session-header{display:flex;gap:17px;align-items:center;margin:23px 0}.session-header .session-symbol{width:66px;height:66px;font-size:31px}.session-header h1{font-size:32px;margin:3px 0 4px}.workout-layout{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(250px,.83fr);gap:20px;align-items:start}.workout-exercises{display:grid;gap:12px}.workout-exercise{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden}.workout-exercise.complete{border-color:#4b7550}.exercise-toggle{display:flex;width:100%;align-items:center;gap:13px;background:transparent;color:inherit;border:0;text-align:left;padding:17px 19px}.exercise-toggle .exercise-emoji{width:47px;height:47px;font-size:22px}.exercise-toggle h3{font-size:15px}.exercise-toggle p{font-size:11px;color:#9aafb1;margin-top:3px}.exercise-toggle .caret{margin-left:auto;color:#aab8b8;font-size:21px;transition:transform .2s}.exercise-body{padding:0 19px 20px}.exercise-body .instructions{color:#bed0cd;font-size:12px;display:grid;gap:7px;margin:0 0 13px 18px;padding:0}.hint-row{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:15px 0}.hint{background:#1d302f;padding:11px;border-radius:11px;color:#afcec2;font-size:11px}.hint.warn{background:#332d2a;color:#e2bf9d}.hint b{display:block;font-size:10px;text-transform:uppercase;letter-spacing:.07em;margin-bottom:3px;color:#d6ebe2}.hint.warn b{color:#f0cb9c}.swap-row{display:flex;align-items:center;gap:7px;flex-wrap:wrap;margin:10px 0}.swap-row select{flex:1;background:#18272e;color:#e2ece9;border:1px solid #3d535a;border-radius:9px;padding:9px;font-size:12px;min-width:150px}.set-grid{display:grid;grid-template-columns:54px 1fr 1fr 57px;gap:8px;align-items:center;margin:9px 0}.set-grid.head{font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:#789197;font-weight:750}.set-grid .field{width:100%;padding:9px 8px;text-align:center;font-size:12px;border-radius:8px}.set-num{font-weight:720;font-size:12px;color:#a9bdbb}.donecheck{display:flex;align-items:center;justify-content:center}.donecheck input{appearance:none;cursor:pointer;height:25px;width:25px;border:1px solid #54716a;border-radius:7px;background:#19282c;margin:0}.donecheck input:checked{background:var(--lime);border-color:var(--lime)}.donecheck input:checked:before{content:'✓';color:#132019;display:grid;place-items:center;font-weight:900;font-size:17px}.set-grid.checked .field{border-color:#567b58;background:#1e342c}.timer-box{background:linear-gradient(140deg,#20362e,#1d2a2a);border:1px solid #425a4b;border-radius:17px;padding:22px;text-align:center;position:sticky;top:18px}.timer-value{font-size:46px;line-height:1.2;font-weight:800;font-variant-numeric:tabular-nums;margin:11px 0 18px;letter-spacing:-.06em}.timer-box .buttonrow{justify-content:center}.progress-count{display:flex;align-items:center;justify-content:space-between;margin:18px 0 8px;font-size:12px;color:#b0c5be}.finishbar{display:grid;gap:11px;margin-top:18px}.finishbar textarea{resize:vertical;width:100%;min-height:75px}.cardio-input{display:flex;gap:11px;align-items:end}.cardio-input>label{flex:1}.cardio-input .field{width:100%}
.list-log{display:grid;gap:10px}.log-item{border:1px solid #2f4249;border-radius:12px;padding:15px;display:flex;align-items:center;justify-content:space-between;gap:12px;background:#18272c}.log-icon{background:#2a3b3c;height:43px;width:43px;border-radius:10px;display:grid;place-items:center;font-size:20px}.log-item-inner{display:flex;gap:13px;align-items:center}.log-item h3{font-size:14px}.log-item p{color:#88a1a5;font-size:11px}.log-item .chip{font-size:10px}.empty{padding:45px 20px;text-align:center;border:1px dashed #40545a;border-radius:16px;background:#142127}.empty .bigemoji{display:block;font-size:37px;margin-bottom:12px}.empty h3{margin-bottom:8px}.empty p{max-width:390px;margin:0 auto 15px;color:#9aafb1;font-size:13px}.bar-chart{display:flex;gap:7px;align-items:flex-end;height:150px;padding-bottom:25px;border-bottom:1px solid #385057;position:relative}.bar-wrap{flex:1;height:100%;display:flex;align-items:flex-end;position:relative;justify-content:center}.bar{background:#567c5b;width:min(100%,34px);border-radius:6px 6px 2px 2px;min-height:2px;position:relative}.bar.good{background:var(--lime)}.bar-wrap>small{position:absolute;bottom:-23px;font-size:10px;color:#7e9998}.bar-label{position:absolute;top:-19px;width:100%;text-align:center;color:#bad7b2;font-size:10px}.weight-plot{width:100%;height:220px;display:block;overflow:visible}.weight-plot .gridline{stroke:#30454c;stroke-width:1}.weight-plot .line{fill:none;stroke:var(--lime);stroke-width:3;stroke-linejoin:round;stroke-linecap:round}.weight-plot circle{fill:#11221a;stroke:var(--lime);stroke-width:3}.weight-plot text{fill:#8fa7a6;font-size:11px}.section-gap{margin-top:24px}.insights-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:20px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.form-label{font-size:12px;font-weight:680;color:#bccdc9;display:grid;gap:7px}.form-label .field{width:100%}.settings-note{padding:17px;background:#182d29;border:1px solid #3a5c50;border-radius:12px;color:#bad1c5;font-size:12px}.settings-note b{color:var(--lime)}.divider{height:1px;background:#2b3d43;margin:18px 0}.resource-list{display:grid;gap:10px}.resource-list a{display:flex;justify-content:space-between;align-items:center;gap:10px;border:1px solid #34464b;border-radius:11px;padding:13px;font-size:12px;text-decoration:none;color:#bfd1cf;background:#19292d}.resource-list a:hover{border-color:var(--lime);color:var(--lime)}.modal-backdrop{position:fixed;inset:0;background:#060d10cc;display:grid;place-items:center;padding:15px;z-index:70}.modal{background:#16242b;border:1px solid #526b65;border-radius:20px;padding:25px;max-width:520px;width:100%;box-shadow:0 25px 120px #0008}.modal h2{margin-bottom:10px}.modal p{font-size:13px;color:#b3c7c3}.modal .buttonrow{margin-top:19px}.toast{position:fixed;bottom:25px;right:26px;z-index:90;padding:12px 17px;border:1px solid #608369;background:#203d2d;color:#d5f4cb;box-shadow:0 10px 30px #0006;border-radius:10px;font-size:12px;font-weight:680;opacity:0;transform:translateY(20px);transition:opacity .2s,transform .2s;pointer-events:none}.toast.show{opacity:1;transform:translateY(0)}.kicker-note{display:flex;align-items:center;gap:10px;font-size:12px;color:#b4cfc3;padding:12px 0}.kicker-note span{color:var(--lime);font-size:16px}.history-stat-row{display:flex;gap:13px;flex-wrap:wrap}.history-stat-row .metric{flex:1;min-width:135px}.health-warning{margin-top:20px}.shift-explain{background:#1e332f;border:1px solid #3f6354;color:#bcd6c7;font-size:12px;border-radius:12px;padding:12px 14px}.shift-explain strong{color:var(--lime)}
@media(max-width:1120px){.shell{grid-template-columns:219px minmax(0,1fr)}.sidebar{padding:26px 12px}.app-container{padding-left:25px;padding-right:25px}.topbar{padding-left:25px;padding-right:25px}.footer{padding-left:25px;padding-right:25px}.app-grid,.workout-layout,.insights-grid,.week-detail{grid-template-columns:minmax(0,1fr)}.workout-layout .timer-box{position:static}.week-strip{gap:5px}.day-tile{padding:11px 3px}.hero-visual{min-width:140px}.ring{width:145px;height:145px}.ring-center strong{font-size:30px}}
@media(max-width:750px){.shell{display:block}.sidebar{display:none}.topbar{height:57px;padding:0 18px}.topbar-left{font-size:9px}.topbar-right>span:not(.profile-circle){display:none}.profile-circle{margin-left:0}.app-container{padding:23px 15px 105px;min-height:100vh}.footer{display:none}.bottom-nav{display:flex;position:fixed;bottom:0;left:0;right:0;background:#111d23ed;border-top:1px solid #3a4b4f;backdrop-filter:blur(20px);z-index:60;padding:8px 7px calc(8px + env(safe-area-inset-bottom));justify-content:space-around}.bottom-nav button{background:none;border:none;color:#8aa4a6;display:flex;flex-direction:column;align-items:center;gap:2px;padding:5px 7px;min-width:54px}.bottom-nav button span{font-size:22px;line-height:1.25}.bottom-nav button small{font-size:9px;font-weight:720}.bottom-nav button.active{color:var(--lime)}h1{font-size:32px}.hero{padding:24px 22px;min-height:260px;align-items:flex-start}.hero h1{font-size:29px}.hero-content{max-width:100%}.hero-visual{display:none}.metric-grid{gap:8px}.metric{padding:14px 12px}.metric-value{font-size:24px}.metric-foot{font-size:10px}.panel{padding:18px 14px}.head-row{align-items:flex-start}.week-strip{gap:5px}.day-tile{min-height:105px;padding:11px 2px}.day-tile .weekday{font-size:9px}.day-tile .daynum{font-size:17px}.day-tile .day-icon{font-size:17px}.day-tile .day-label{font-size:8px}.session-card{padding:13px;gap:10px}.session-symbol{width:44px;height:44px;font-size:23px}.session-card .btn.small{padding:6px 8px}.exercise-grid{grid-template-columns:1fr}.timeline-day{padding:13px;gap:8px}.timeline-date{width:44px;padding-right:8px}.timeline-date strong{font-size:17px}.timeline-actions{flex-direction:column}.detail-hero{padding:22px}.detail-hero h1{font-size:27px}.exercise-detail-layout{grid-template-columns:1fr}.exercise-toggle{padding:14px}.exercise-body{padding:0 14px 18px}.hint-row{grid-template-columns:1fr}.session-header h1{font-size:28px}.form-grid{grid-template-columns:1fr}.toast{bottom:90px;left:16px;right:16px;text-align:center}.week-nav{gap:5px}.week-nav .chip{font-size:10px;padding:6px}.buttonrow .btn{white-space:normal}}
@media(max-width:370px){.metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.week-strip{grid-template-columns:repeat(7,minmax(0,1fr));gap:3px}.day-tile .day-label{font-size:7px}.session-info strong{font-size:13px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
/* Guided training + treadmill modules */
.walk-guide{background:linear-gradient(145deg,#172e2e,#19262d);border:1px solid #35605a;padding:18px;border-radius:16px}
.walk-guide h3{font-size:19px}
.walk-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px}
.walk-steps>div{display:flex;flex-direction:column;gap:4px;border:1px solid #34524d;background:#1b3331;border-radius:12px;padding:13px 11px;min-width:0}
.walk-steps b{font-size:24px;line-height:1.1;color:var(--aqua)}
.walk-steps span{font-size:10px;color:#97bab3;font-weight:650}
.walk-steps strong{font-size:12px;line-height:1.35;color:#e7faf0}
.walk-steps small{color:#b4cfcc}
.instruction-list{display:grid;gap:13px;margin:19px 0 0;padding-left:21px;color:#c8d9d2;font-size:14px}
.instruction-list li{padding-left:5px}
.workout-layout{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(250px,1fr);gap:20px;align-items:start}
.workout-exercise{margin-top:15px;border:1px solid #345047;border-radius:15px;background:#192a2d;overflow:hidden}
.workout-exercise:first-child{margin-top:0}
.workout-exercise .exercise-toggle{display:flex;align-items:center;gap:12px;padding:16px 19px}
.workout-exercise .exercise-toggle .exercise-title{flex:1;min-width:0}
.workout-exercise .exercise-toggle .exercise-title h3{font-size:15px}
.workout-exercise .exercise-toggle .exercise-title p{font-size:11px;color:#8da9a7}
.exercise-stack{display:grid;gap:15px;margin-top:18px}
.exercise-stack .workout-exercise{margin:0}
.workout-exercise .exercise-body{border-top:1px solid #2e4843;padding:16px 19px 19px}
.workout-exercise .hint-row{margin:12px 0}
.exercise-toggle>.chip{font-size:10px}
.topbar-settings{border:1px solid #4b6059;border-radius:50%;width:34px;height:34px;background:#273e32;color:var(--lime);font-size:15px;cursor:pointer}
.topbar-settings.active{outline:2px solid var(--lime)}
@media(max-width:1120px){.workout-layout{grid-template-columns:1fr}}
@media(max-width:750px){.walk-guide{padding:14px}.walk-steps{gap:5px}.walk-steps>div{padding:10px 7px}.walk-steps b{font-size:20px}.walk-steps strong{font-size:10px}.walk-steps span{font-size:9px}.workout-exercise .exercise-toggle{padding:13px}.workout-exercise .exercise-body{padding:13px}.exercise-toggle>.chip{display:none}.instruction-list{font-size:12px}}
@media(max-width:370px){.walk-steps{grid-template-columns:1fr}.walk-steps>div{display:grid;grid-template-columns:50px 1fr 90px;align-items:center}.walk-steps>div small{grid-column:3}.walk-steps b{grid-row:1/3}}
@media(max-width:750px){.head-row{flex-wrap:wrap}.head-row>.week-nav{width:100%;flex-wrap:wrap;justify-content:flex-start}}

/* GymOS 2.0 — large muscle library and customizable focused sessions */
.muscle-panel{margin-bottom:19px}.muscle-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-top:17px}
.muscle-card{display:flex;flex-direction:column;align-items:flex-start;gap:5px;min-height:138px;text-align:left;color:#e1eeeb;background:#1a2b2e;border:1px solid #38504e;border-radius:13px;padding:15px;cursor:pointer;min-width:0}
.muscle-card:hover,.muscle-card.selected{border-color:var(--lime);background:#223b31}.muscle-card.selected b{color:var(--lime)}
.muscle-card b{font-size:15px}.muscle-card small{color:var(--lime);font-weight:800}.muscle-icon{font-size:24px}.muscle-desc{font-size:10px;line-height:1.55;color:#9ab6b2}
.muscle-target{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;margin:12px 0 19px}
.muscle-target>div{background:#20322f;border:1px solid #37544b;border-radius:10px;padding:10px;display:grid;gap:5px;font-size:12px;color:#bad5ca}
.muscle-target b{font-size:11px;color:var(--lime)}.custom-workout{padding:20px;margin-top:16px;background:#172d29;border:1px dashed #577668;border-radius:14px}
.custom-row{display:flex;gap:8px;align-items:center;margin-top:14px}.custom-row .field{flex:1;min-width:0;max-width:100%}
.focus-choice-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:14px}.focus-choice-grid .btn{white-space:normal;justify-content:flex-start;text-align:left}
.modal{max-height:min(88vh,740px);overflow-y:auto;overscroll-behavior:contain}
@media(max-width:980px){.muscle-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:750px){.muscle-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.muscle-card{min-height:124px;padding:12px}.muscle-desc{font-size:10px}.muscle-target{grid-template-columns:1fr}.custom-row{flex-direction:column;align-items:stretch}.custom-row select{width:100%}.focus-choice-grid .btn{font-size:12px;padding:11px 8px}}
@media(max-width:360px){.focus-choice-grid{grid-template-columns:1fr}.muscle-card{padding:10px}}