.study-nav-link{font-weight:750}.study-dashboard{padding:44px 0 88px}.study-dashboard .page-head{margin-bottom:28px}.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:18px 0 24px}.metric-card{border:1px solid var(--line);border-radius:20px;padding:18px;background:var(--card)}.metric-card span{display:block;color:var(--muted);font-size:11px;letter-spacing:.08em}.metric-card strong{display:block;font-size:28px;line-height:1.2;margin-top:6px;letter-spacing:-.04em}.study-layout{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(280px,.7fr);gap:16px}.study-card{border:1px solid var(--line);border-radius:24px;padding:22px;background:var(--card)}.study-card h2,.study-card h3{margin:0 0 12px}.study-card p{color:var(--muted)}.timer-shell{text-align:center;padding:18px 0}.timer-ring{width:min(320px,78vw);aspect-ratio:1;margin:10px auto 22px;border-radius:50%;border:14px solid var(--soft);display:grid;place-items:center;position:relative}.timer-ring:before{content:"";position:absolute;inset:-14px;border-radius:50%;background:conic-gradient(var(--red) var(--timer-progress,0deg),transparent 0);-webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 14px),#000 0);mask:radial-gradient(farthest-side,transparent calc(100% - 14px),#000 0)}.timer-value{font-size:clamp(54px,10vw,82px);font-weight:900;letter-spacing:-.06em;font-variant-numeric:tabular-nums}.timer-sub{font-size:12px;color:var(--muted)}.timer-controls{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.timer-btn{border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:999px;min-height:44px;padding:9px 17px;font-weight:800;cursor:pointer}.timer-btn.primary{background:var(--red);color:#fff;border-color:var(--red)}.study-form{display:grid;gap:12px}.study-form label{display:grid;gap:6px;font-size:13px}.study-form input,.study-form select,.study-form textarea{width:100%;border:1px solid var(--line);background:var(--paper);color:var(--ink);border-radius:12px;padding:10px 12px}.study-form textarea{min-height:86px;resize:vertical}.heatmap-wrap{overflow-x:auto;padding-bottom:4px}.heatmap{display:grid;grid-template-rows:repeat(7,12px);grid-auto-flow:column;grid-auto-columns:12px;gap:4px;width:max-content}.heatmap-cell{width:12px;height:12px;border-radius:3px;background:var(--soft);border:1px solid color-mix(in srgb,var(--line) 70%,transparent)}.heatmap-cell.lv1{background:color-mix(in srgb,var(--red) 20%,var(--soft))}.heatmap-cell.lv2{background:color-mix(in srgb,var(--red) 40%,var(--soft))}.heatmap-cell.lv3{background:color-mix(in srgb,var(--red) 65%,var(--soft))}.heatmap-cell.lv4{background:var(--red)}.heatmap-legend{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:11px;margin-top:10px}.donut-wrap{display:grid;grid-template-columns:170px 1fr;gap:18px;align-items:center}.donut{width:170px;aspect-ratio:1;border-radius:50%;background:conic-gradient(var(--red) 0 25%,var(--orange) 25% 50%,var(--purple) 50% 75%,var(--cyan) 75% 100%);position:relative;display:grid;place-items:center}.donut:after{content:"";position:absolute;inset:28px;background:var(--card);border-radius:50%}.donut-center{position:relative;z-index:2;text-align:center}.donut-center strong{display:block;font-size:24px}.donut-center span{font-size:11px;color:var(--muted)}.legend{display:grid;gap:8px}.legend-row{display:flex;justify-content:space-between;gap:12px;font-size:13px}.legend-row span:first-child:before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:7px;background:var(--legend,var(--red))}.trend{display:flex;align-items:end;gap:8px;height:170px;padding-top:10px}.trend-bar{flex:1;min-width:18px;display:flex;flex-direction:column;justify-content:end;align-items:center;gap:6px;height:100%}.trend-bar i{display:block;width:100%;max-width:36px;height:var(--h);background:var(--red);border-radius:8px 8px 3px 3px;min-height:3px}.trend-bar span{font-size:10px;color:var(--muted)}.history-list{display:grid;gap:10px}.history-row{display:grid;grid-template-columns:86px 1fr auto;gap:12px;align-items:center;border-top:1px solid var(--line);padding-top:10px}.history-row:first-child{border-top:0;padding-top:0}.sync-badge{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:999px;padding:5px 9px;font-size:11px;color:var(--muted)}.auth-shell{max-width:560px;margin:auto}.auth-actions{display:flex;gap:8px;flex-wrap:wrap}.data-actions{display:flex;gap:8px;flex-wrap:wrap}.control-shell{padding:46px 0 88px}.control-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.control-table{width:100%;border-collapse:collapse}.control-table th,.control-table td{border-bottom:1px solid var(--line);padding:10px 8px;text-align:left;font-size:13px}.control-guard{max-width:620px;margin:80px auto;text-align:center}.notice{border:1px solid var(--line);background:var(--soft);border-radius:16px;padding:14px 16px;color:var(--muted);font-size:13px}.home-study-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.home-study-item{border:1px solid var(--line);border-radius:18px;padding:15px;background:var(--card)}.home-study-item span{font-size:11px;color:var(--muted)}.home-study-item strong{display:block;font-size:22px;margin-top:3px}.quick-links{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}

/* Focus + analytics unified experience */
.focus-panel .ghost-link{background:transparent;color:inherit;border-color:color-mix(in srgb,currentColor 26%,transparent)}
.focus-panel .ghost-link:hover{background:color-mix(in srgb,currentColor 8%,transparent)}
.focus-section-divider{margin:32px 0 18px;padding-top:26px;border-top:1px solid var(--line)}
.focus-section-divider h2{margin:4px 0 6px;font-size:30px;letter-spacing:-.03em}
.focus-section-divider p{margin:0;color:var(--muted)}
.subject-field{display:grid;gap:8px}.subject-field>span{font-size:13px;font-weight:700;color:var(--ink)}
.subject-picker{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;padding:6px;border:1px solid var(--line);border-radius:16px;background:var(--soft)}
.subject-choice{position:relative;min-width:0}.subject-choice input{position:absolute;opacity:0;pointer-events:none;width:1px;height:1px}.subject-choice span{min-height:42px;padding:8px 6px;border-radius:11px;display:flex;align-items:center;justify-content:center;text-align:center;font-size:12px;font-weight:800;color:var(--muted);cursor:pointer;transition:.16s ease;background:transparent}.subject-choice input:checked+span{background:var(--card);color:var(--ink);box-shadow:0 4px 14px rgba(0,0,0,.08);border:1px solid color-mix(in srgb,var(--red) 24%,var(--line))}.subject-choice input:focus-visible+span{outline:2px solid color-mix(in srgb,var(--red) 55%,transparent);outline-offset:2px}.subject-choice span:active{transform:scale(.97)}
.focus-feedback{min-height:22px;margin-top:8px;font-size:13px}.focus-feedback.success{color:var(--green)}.focus-feedback.error{color:var(--red)}
.analytics-stack{display:grid;gap:16px}.analytics-stack>.study-card{margin:0!important}

@media(max-width:900px){.metric-grid,.control-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.study-layout{grid-template-columns:1fr}.home-study-strip{grid-template-columns:repeat(2,minmax(0,1fr))}.subject-picker{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:640px){.study-dashboard{padding:28px 0 62px}.metric-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.metric-card{padding:14px;border-radius:17px}.metric-card strong{font-size:24px}.study-card{padding:17px;border-radius:20px}.donut-wrap{grid-template-columns:1fr;justify-items:center}.legend{width:100%}.history-row{grid-template-columns:72px 1fr}.history-row>:last-child{grid-column:2}.control-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.home-study-strip{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.home-study-item{padding:13px}.subject-picker{grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}.subject-choice:last-child{grid-column:1/-1}.focus-section-divider h2{font-size:26px}}
@media(max-width:360px){.metric-grid,.control-grid,.home-study-strip{grid-template-columns:1fr}}
@media(min-width:761px) and (max-width:980px){.links{display:none}.menu-btn{display:grid;margin-left:auto}.mobile-panel{position:fixed;inset:calc(70px + env(safe-area-inset-top)) 0 auto 0;z-index:45;background:var(--paper);border-bottom:1px solid var(--line);padding:12px 20px calc(18px + env(safe-area-inset-bottom));max-height:calc(100dvh - 70px - env(safe-area-inset-top));overflow:auto;box-shadow:0 18px 42px rgba(0,0,0,.10)}.mobile-panel.open{display:grid}.mobile-panel a{min-height:46px;display:flex;align-items:center;padding:10px 8px;border-bottom:1px solid var(--line)}.mobile-panel .icon-btn{margin-top:10px}body.menu-open{overflow:hidden}}