:root {
  --olive:#6f7848;
  --olive-dark:#535c35;
  --olive-soft:#eef0e4;
  --ink:#242722;
  --muted:#6d716a;
  --cream:#f7f6f1;
  --white:#ffffff;
  --line:#dedfd8;
  --actual:#2f6b3b;
  --carried:#b7b7b7;
  --danger:#9a3d36;
  --shadow:0 8px 24px rgba(38,42,31,.08);
}
*{box-sizing:border-box}
html{background:var(--cream)}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--cream);min-height:100vh}
button,input{font:inherit}
button{cursor:pointer}
.app-header{background:var(--white);border-bottom:1px solid var(--line);padding:18px max(18px,env(safe-area-inset-left)) 14px}
.brand-wrap{max-width:980px;margin:auto;display:flex;align-items:center;gap:12px}
.brand-mark{width:48px;height:48px;border-radius:14px;background:var(--olive);color:white;display:grid;place-items:center;font-weight:800;font-size:18px;box-shadow:var(--shadow)}
h1{font-size:22px;margin:0 0 3px}.brand-wrap p,.section-heading p,.card p{margin:0;color:var(--muted);font-size:14px}
.tabs{position:sticky;top:0;z-index:10;background:rgba(247,246,241,.96);backdrop-filter:blur(10px);display:flex;justify-content:center;gap:8px;padding:10px 14px;border-bottom:1px solid var(--line)}
.tab{border:0;background:transparent;color:var(--muted);font-weight:800;letter-spacing:.04em;padding:10px 18px;border-radius:999px}
.tab.active{background:var(--olive);color:#fff}
main{max-width:980px;margin:0 auto;padding:18px 16px 48px}.panel{display:none}.panel.active{display:block}
.date-card{display:grid;grid-template-columns:48px 1fr 48px;align-items:center;background:var(--white);border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow)}
.date-center{text-align:center}.date-label{font-weight:800;font-size:18px}.day-label{color:var(--olive-dark);font-weight:700;margin-top:2px}.icon-btn{width:42px;height:42px;border:0;border-radius:12px;background:var(--olive-soft);color:var(--olive-dark);font-size:28px;line-height:1}.today-btn{display:block;margin:10px auto 16px;border:0;background:transparent;color:var(--olive-dark);font-weight:700}.today-btn.hidden{visibility:hidden}
.card{background:var(--white);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:18px;margin:14px 0}.compact-card{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center}.compact-card h2,.card h2{margin:0 0 4px;font-size:18px}.weight-controls{display:flex;gap:8px;align-items:center}.weight-controls input{width:90px;padding:11px;border:1px solid #c8cac1;border-radius:12px;background:#fff}.primary-btn,.secondary-btn{border:0;border-radius:12px;padding:11px 15px;font-weight:800}.primary-btn{background:var(--olive);color:white}.secondary-btn{background:var(--olive-soft);color:var(--olive-dark)}.status-text{grid-column:1/-1;color:var(--muted);font-size:13px;min-height:17px}
.session-card{background:var(--white);border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);margin:16px 0}.session-header{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:16px 18px;background:#fafaf7;border-bottom:1px solid var(--line)}.session-title{font-size:19px;font-weight:850}.session-subtitle{color:var(--muted);font-size:13px;margin-top:3px}.completion-badge{white-space:nowrap;font-size:12px;font-weight:850;padding:7px 10px;border-radius:999px;background:var(--olive-soft);color:var(--olive-dark)}.completion-badge.complete{background:var(--olive);color:#fff}.session-body{padding:8px 16px 14px}.mobility-video{width:100%;max-height:560px;background:#111;border-radius:14px;margin:10px 0 14px}
.check-item{display:grid;grid-template-columns:28px 1fr auto;gap:10px;align-items:center;padding:12px 4px;border-bottom:1px solid #ededE8}.check-item:last-child{border-bottom:0}.check-item input[type="checkbox"]{appearance:none;width:24px;height:24px;border:2px solid #a9ad9c;border-radius:7px;display:grid;place-content:center;background:#fff}.check-item input[type="checkbox"]:checked{background:var(--olive);border-color:var(--olive)}.check-item input[type="checkbox"]:checked::after{content:"✓";color:#fff;font-weight:900;font-size:16px}.exercise-name{font-weight:750}.prescription{display:block;color:var(--muted);font-size:13px;margin-top:2px}.walk-minutes{width:72px;padding:8px;border:1px solid #c8cac1;border-radius:10px;text-align:center}.empty-session{padding:18px;color:var(--muted);text-align:center}
.section-heading{margin:4px 2px 12px}.section-heading h2{font-size:24px;margin:0 0 4px}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.stat-card{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:16px;box-shadow:var(--shadow)}.stat-card span{display:block;font-size:30px;font-weight:900;color:var(--olive-dark)}.stat-card small{color:var(--muted);font-size:12px}.chart-topline{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.range-toggle{display:flex;background:var(--olive-soft);border-radius:10px;padding:3px}.range-btn{border:0;background:transparent;padding:7px 9px;border-radius:8px;color:var(--olive-dark);font-weight:800;font-size:12px}.range-btn.active{background:white;box-shadow:0 1px 5px rgba(0,0,0,.08)}.legend{display:flex;gap:16px;flex-wrap:wrap;margin:14px 0;color:var(--muted);font-size:12px}.legend span{display:flex;align-items:center;gap:6px}.dot{width:10px;height:10px;border-radius:50%;display:inline-block}.dot.actual{background:var(--actual)}.dot.carried{background:var(--carried)}.line-key{display:inline-block;width:22px;height:0;border-top:3px solid var(--olive)}.canvas-wrap{position:relative;min-height:300px}.canvas-wrap canvas{width:100%;height:300px;display:block}.chart-empty{position:absolute;inset:0;display:none;place-items:center;color:var(--muted);font-weight:700}.backup-card{display:flex;justify-content:space-between;gap:12px;align-items:center}.backup-actions{display:flex;gap:8px}.file-btn{position:relative;overflow:hidden;display:inline-block}.file-btn input{position:absolute;inset:0;opacity:0;cursor:pointer}
.mobility-library-card video{width:100%;max-height:600px;background:#111;border-radius:14px;margin-top:12px}.exercise-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.exercise-card{background:var(--white);border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow)}.exercise-card img{width:100%;display:block;background:#fff;aspect-ratio:4/5;object-fit:contain}.exercise-card-info{padding:14px}.exercise-card-info h3{margin:0 0 4px;font-size:16px}.exercise-card-info p{margin:0;color:var(--muted);font-size:13px}
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);background:#20231f;color:#fff;padding:10px 14px;border-radius:999px;opacity:0;pointer-events:none;transition:.2s;z-index:30;font-size:13px}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:680px){main{padding:14px 12px 40px}.tabs{justify-content:space-around}.tab{padding:9px 12px}.compact-card{grid-template-columns:1fr}.weight-controls{justify-content:flex-start}.stats-grid{grid-template-columns:1fr 1fr}.stat-card:last-child{grid-column:1/-1}.chart-topline{display:block}.range-toggle{width:max-content;margin-top:10px}.backup-card{display:block}.backup-actions{margin-top:12px}.exercise-grid{grid-template-columns:1fr}.check-item{grid-template-columns:28px 1fr}.check-item .walk-minutes{grid-column:2}.completion-badge{font-size:11px}.session-header{align-items:flex-start}}

/* v1.1 refinements */
.mobility-video-wrap{position:relative;margin:10px 0 14px;border-radius:14px;overflow:hidden;background:#111}.mobility-video-wrap .mobility-video{margin:0;border-radius:0;display:block}.mobility-video-title{display:none}
.check-item{grid-template-columns:1fr auto}.check-main{display:grid;grid-template-columns:28px 1fr;gap:10px;align-items:center;min-width:0;cursor:pointer}.check-actions{display:flex;align-items:center;gap:8px}.plate-btn{border:1px solid var(--olive);background:#fff;color:var(--olive-dark);font-size:11px;font-weight:900;letter-spacing:.04em;padding:8px 10px;border-radius:10px;cursor:pointer}.plate-btn:hover{background:var(--olive-soft)}
.plate-modal{position:fixed;inset:0;background:rgba(18,20,16,.72);z-index:100;display:none;padding:24px;align-items:center;justify-content:center}.plate-modal.open{display:flex}.plate-modal-card{width:min(900px,96vw);max-height:94vh;background:#fff;border-radius:18px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.28);display:flex;flex-direction:column}.plate-modal-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 16px;border-bottom:1px solid var(--line)}.plate-modal-header h2{margin:0;font-size:18px}.modal-close{width:38px;height:38px;border:0;border-radius:50%;background:var(--olive-soft);color:var(--olive-dark);font-size:27px;line-height:1;cursor:pointer}.plate-modal-body{overflow:auto;background:#f7f7f3;text-align:center}.plate-modal-body img{display:block;width:100%;height:auto;max-width:820px;margin:0 auto;background:#fff}.modal-open{overflow:hidden}
@media(max-width:680px){.check-item{grid-template-columns:1fr auto}.check-actions{flex-direction:column;gap:6px}.plate-btn{padding:7px 9px}.plate-modal{padding:8px}.plate-modal-card{width:100%;max-height:96vh}.plate-modal-header{padding:10px 12px}.plate-modal-body img{width:100%}}