/* OPOFocus v10.2: readable rhythm and progressive disclosure. */
:root{--v102-gap:26px;--v102-radius:18px}
body{line-height:1.6}.content{max-width:1180px;padding:32px 38px 52px}.layout{grid-template-columns:220px minmax(0,1fr)}
#screen{min-width:0}#screen>*{max-width:100%}#screen>h1{margin:8px 0 16px}#screen>h1+p{margin-bottom:28px}
.panel{padding:26px;border-radius:var(--v102-radius);margin-bottom:26px}.grid,.v10-grid{gap:26px}.grid>.panel,.v10-grid>.panel{margin-bottom:0}.grid{margin-bottom:26px}
h1{font-size:30px;line-height:1.25;letter-spacing:-.6px}h2{line-height:1.35;margin-bottom:16px}h3{line-height:1.45;margin-bottom:14px}p{margin-bottom:18px}.mt{margin-top:24px}
label{font-size:13px;line-height:1.5;margin-top:14px;margin-bottom:7px}input,select,textarea{min-height:46px;min-width:0;font-size:15px}textarea{min-height:116px;line-height:1.6}
button{min-height:44px;padding:11px 16px;line-height:1.4}button.primary{box-shadow:0 3px 10px #07132025}.actions,.tabs,.widebar{gap:12px}.actions{align-items:center}.actions>button{max-width:100%}
.fieldrow{gap:18px;align-items:end}.fieldrow>div{min-width:0}.fieldrow label{margin-top:0}.topic{padding:22px 0;gap:20px}.topic strong{font-size:15px;line-height:1.55}.topic small{margin-top:7px}.topic .actions button{min-height:44px;padding:9px 13px}
.row,.cardline{gap:18px}.cardline{padding:20px 0}.heading{align-items:flex-start;gap:24px;margin-bottom:28px}.heading h1{margin-bottom:10px}.heading p{margin-bottom:0}
.sidebar{padding:28px 16px}.nav{margin:9px 0;padding:15px 14px}.sidebar .top-account{margin:22px 0;padding:13px}.brand{font-size:22px}.v10-foot{margin-top:32px;padding:22px 0;border-top:1px solid var(--border)}
.v102-page-heading{margin-bottom:28px}.v102-page-heading h1{margin:8px 0 12px}.v102-page-heading>p{color:var(--muted);margin-bottom:22px}.v102-page-heading .actions{margin-top:22px}
.v10-hero{padding:30px;margin:0 0 26px;border-radius:20px}.v10-hero h2{font-size:24px;margin:14px 0 18px;max-width:800px}.v10-hero .actions{margin-top:24px}
.v102-metric-strip{display:flex;flex-wrap:wrap;gap:20px 32px;padding:20px 0 28px;margin-bottom:24px;border-bottom:1px solid var(--border);color:var(--muted);font-size:13px}.v102-metric-strip b{font-size:18px;color:var(--txt);margin-right:8px}
.v102-study-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:24px}.v102-study-tools{border:1px solid var(--border);background:#101d2b;border-radius:14px;margin-bottom:26px}.v102-study-tools>summary{padding:18px 22px;color:var(--blue);font-weight:650;cursor:pointer}
.v102-tool-groups{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;padding:6px 22px 24px}.v102-tool-groups h3{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}.v102-tool-groups button{display:block;width:100%;text-align:left;margin:10px 0}.v102-tool-groups button span{display:block;font-weight:400;color:var(--muted);font-size:12px;margin-top:5px}
.v102-disclosure{border:1px solid var(--border);border-radius:16px;background:#111f2e;margin:0 0 24px;min-width:0}.v102-disclosure>summary{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 24px;color:#d2e7f8;font-weight:600;cursor:pointer;list-style:none}.v102-disclosure>summary::-webkit-details-marker{display:none}.v102-disclosure>summary:after{content:'＋';font-size:20px;color:var(--muted);font-weight:400}.v102-disclosure[open]>summary:after{content:'−'}.v102-disclosure[open]>summary{border-bottom:1px solid var(--border)}
.v102-disclosure>.v102-disclosure-body{margin:0;padding:24px;background:transparent;border:0;border-radius:0;min-width:0}.v102-disclosure-body .panel{background:transparent}.v102-disclosure-body>h2:first-child,.v102-disclosure-body>h3:first-child{display:none}.v102-disclosure summary:focus-visible{outline:3px solid var(--green);outline-offset:3px}.v102-single-column{grid-template-columns:minmax(0,1fr)}
.v102-advanced-test>label:first-child{margin-top:0}.v102-advanced-test>button{margin-top:20px}.v10-note{padding:12px 16px;font-size:13px;line-height:1.65;margin-bottom:26px;background:#302c2025;border-radius:0 10px 10px 0}
.v10-source{line-height:1.7;overflow-wrap:anywhere}.v10-option{margin:14px 0;padding:20px}.v10-pagination{gap:9px;margin:20px 0}.v10-question{font-size:22px;margin-top:24px}.v10-dialog>div{padding:28px;max-width:680px}.v10-dialog h2{margin:8px 0 18px}.v10-dialog .fieldrow{align-items:start}.v10-dialog .actions{margin-top:26px}
.v102-backbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:0 0 28px;padding-bottom:16px;border-bottom:1px solid var(--border)}.v102-backbar button{background:transparent;box-shadow:none}.v102-backbar span,.v102-backbar .mini{font-size:12px;color:var(--muted)}
.v102-section-heading{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;margin-bottom:20px}.v102-section-heading h2{margin:0}.v102-week{margin:32px 0}.daygrid{gap:18px}.daybox{padding:20px;min-width:230px}.daybox h3{margin-bottom:22px}.daygrid{grid-template-columns:repeat(7,minmax(230px,1fr))}.v102-plan-item{padding:18px 0;border-top:1px solid var(--border)}.v102-plan-item p{margin:10px 0}.v102-plan-check{display:flex;align-items:flex-start;gap:10px;margin:0;color:var(--txt);font-size:13px}.v102-plan-check input{width:auto;min-height:0;margin-top:4px}.v102-plan-item .actions{gap:8px}.v102-plan-item .actions button{font-size:12px;min-height:42px}.v102-completed{opacity:.65}.v102-completed strong{text-decoration:line-through}.v102-day-empty{padding:15px 0}.v102-add-day{width:100%;margin-top:18px!important}
.v102-hours{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;margin:20px 0}.v102-hours button{font-size:13px}.v10-calendar{gap:14px}.v10-day{padding:14px;min-width:220px}.v10-days-heading{padding:12px 0!important;margin:0 0 10px!important}.v10-slot{min-height:58px;padding:7px 2px}.v10-slot[hidden]{display:none}.v10-slot>span{color:#8ba0b1;font-size:10px}.v10-event{padding:12px;margin:8px 0;border-radius:10px;line-height:1.5}.v10-event .actions{gap:7px;align-items:stretch}.v10-event button{min-height:40px;padding:8px 9px;font-size:11px}.opo-session-legend{gap:10px;margin:20px 0}
.opo-control-line{gap:14px;align-items:flex-end}.opo-flashcard{padding:26px!important;margin:20px 0}.opo-flashcard h2{line-height:1.6}.opo-lib-entry{padding:20px;margin:14px 0}.opo-lib-entry .v102-disclosure{margin:16px 0 0}.opo-lib-group{margin:18px 0}.opo-lib-group>summary{padding:18px}.opo-lib-summary{gap:16px;margin-bottom:26px}.opo-library-layout{gap:24px}.opo-lib-caution{margin:20px 0!important;line-height:1.6}.opo-lib-controlbar{gap:12px;margin:24px 0}.opo-lib-study-pane{min-width:0}.opo-pdf-frame{margin-top:16px}
.checkline input,.todo input{width:auto;min-height:0}.todo{padding:14px 0;gap:12px}.flowcard{padding:17px;margin:15px 0}.kanban{gap:18px}.lane{padding:18px}.v10-table td,.v10-table th{padding:16px 14px}
.v10-minimal .v102-backbar{margin-bottom:20px}.v10-minimal details.focus-secondary{display:none}.v10-minimal .grid.g2{grid-template-columns:1fr!important}.v10-minimal .content{max-width:760px}
#screen[data-page="focus"]>.grid.g2{grid-template-columns:1fr}.content:has(#screen[data-page="focus"]){max-width:920px}
@media(min-width:901px){.v10-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.v10-grid:has(> :nth-child(4)){grid-template-columns:repeat(4,minmax(0,1fr))}}
@media(max-width:1100px) and (min-width:901px){.content{padding:28px}.g2{grid-template-columns:1fr}.v10-grid:has(> :nth-child(4)){grid-template-columns:repeat(2,minmax(0,1fr))}.heading{flex-wrap:wrap}.fieldrow{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:900px){.layout{display:block}.content{padding:26px 22px 44px}.sidebar{position:static;padding:16px 20px}.sidebar .top-account{margin:12px 0}.sidebar nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));overflow:visible;gap:8px}.sidebar nav .nav{width:100%;min-width:0;white-space:normal;text-align:center;margin:0;padding:12px 8px;min-height:46px}.sidebar .top-account{display:flex;align-items:center;justify-content:space-between;gap:12px}.sidebar .top-account button{width:auto;margin:0}.g2{grid-template-columns:1fr}.panel{padding:24px}.v102-backbar{margin-bottom:24px}.daybox{flex:0 0 min(80vw,285px)}}
@media(max-width:650px){body{font-size:15px}.content{padding:24px 16px 40px}.panel{padding:22px;margin-bottom:24px}.grid,.v10-grid{gap:24px}.g2{grid-template-columns:1fr}.g4{grid-template-columns:repeat(2,minmax(0,1fr))}.v10-grid{grid-template-columns:1fr}.v10-grid:has(> :nth-child(4)){grid-template-columns:repeat(2,minmax(0,1fr))}.v10-grid .v10-huge{font-size:27px}.v10-grid .panel{padding:18px}.fieldrow{grid-template-columns:1fr;gap:18px}h1{font-size:27px}h2{font-size:21px}h3{font-size:17px}.heading{display:flex;flex-direction:column;gap:20px}.v10-hero{padding:24px}.v10-hero h2{font-size:21px}.actions{gap:12px}.v102-study-actions>button{flex:1 1 140px}.v102-tool-groups{grid-template-columns:1fr;padding:4px 20px 20px;gap:18px}.v102-tool-groups section{border-top:1px solid var(--border);padding-top:18px}.v102-disclosure>summary{padding:19px 20px}.v102-disclosure>.v102-disclosure-body{padding:20px}.v102-metric-strip{display:grid;grid-template-columns:1fr;gap:14px}.v10-dialog{padding:12px}.v10-dialog>div{padding:22px}.v10-question{font-size:20px}.v10-option{padding:18px}.v10-calendar{--v10-day-min:265px}.topic .actions{justify-content:flex-start}.topic .actions>button{flex:0 1 auto}.opo-lib-controlbar input{min-width:0;width:100%;flex-basis:100%}.opo-lib-summary{grid-template-columns:repeat(2,minmax(0,1fr))}.opo-study-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.opo-library-layout{grid-template-columns:minmax(0,1fr)}.v102-backbar>span{max-width:50%;text-align:right}.v10-foot{line-height:1.8}}
@media(prefers-reduced-motion:reduce){details,.panel{scroll-behavior:auto}}

/* Study duration summary: keep hours and minutes readable on narrow screens. */
.v103-time-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px}.v103-time-grid>.panel{margin:0;min-width:0}.v103-time-grid .v10-huge,.v103-time-grid .stat b{font-size:clamp(23px,2.5vw,32px);font-variant-numeric:tabular-nums;overflow-wrap:anywhere}.v103-time-grid [data-study-metric="total"]{border-color:#669f96}.v103-time-grid+.mini{margin-bottom:26px}
@media(max-width:800px){.v103-time-grid{grid-template-columns:1fr;gap:18px}.v103-time-grid .panel{padding:22px}.v103-time-grid .v10-huge,.v103-time-grid .stat b{font-size:28px}}