.study-discovery{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:0 0 24px}.study-discovery-card{display:flex;gap:16px;align-items:center;text-align:left;padding:20px;border:1px solid var(--line);border-radius:14px;background:var(--panel);color:var(--text);min-width:0}.study-discovery-card>span:nth-child(2){flex:1}.study-discovery-card strong,.study-discovery-card small{display:block}.study-discovery-card strong{font-size:1rem;margin-bottom:5px}.study-discovery-card small{color:var(--muted);line-height:1.5}.study-discovery-icon{font-size:2rem;color:var(--accent)}.arena-discovery{background:var(--soft)}
.study-social-dialog{width:min(1040px,calc(100% - 32px));max-height:92dvh;padding:28px;border:1px solid var(--line);border-radius:22px;background:var(--panel);color:var(--text);overflow:auto}.study-social-dialog::backdrop{background:rgb(8 20 24 / .65);backdrop-filter:blur(4px)}.social-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:24px}.social-heading h2{font-family:Georgia,serif;font-size:clamp(1.8rem,4vw,2.6rem);margin:5px 0 8px}.social-heading p{margin:0;color:var(--muted);line-height:1.5}.social-heading button{flex-shrink:0}.social-toolbar{display:flex;align-items:end;flex-wrap:wrap;gap:12px;margin:18px 0}.social-toolbar label{min-width:150px}.social-toolbar button{min-height:42px}.social-toolbar strong{font-size:.85rem;color:var(--muted);margin-left:auto;align-self:center}.social-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:24px 0}.social-metrics>div{background:var(--soft);border-radius:12px;padding:18px 12px}.social-metrics strong{display:block;font-size:1.8rem;font-variant-numeric:tabular-nums}.social-metrics span{display:block;font-size:.8rem;color:var(--muted);margin-top:4px}.social-status{min-height:1.5em;color:var(--muted);font-size:.9rem}.heatmap-period-nav{display:flex;align-items:center;gap:16px}.heatmap-period-nav h3{margin:0;min-width:120px;text-align:center}.heatmap-calendar{display:flex;gap:8px;margin-top:20px}.heatmap-scroll{overflow-x:auto;padding:0 4px 12px;flex:1;scrollbar-width:thin}.heatmap-weekdays{display:grid;grid-template-rows:repeat(7,16px);gap:4px;padding-top:26px;font-size:10px;color:var(--muted)}.heatmap-grid{display:grid;grid-auto-flow:column;grid-template-rows:repeat(7,16px);grid-template-columns:repeat(var(--heatmap-weeks),16px);gap:4px;width:max-content}.heatmap-months{display:grid;grid-template-columns:repeat(var(--heatmap-weeks),16px);gap:4px;height:26px;font-size:10px;width:max-content;color:var(--muted)}.heatmap-day,.heatmap-legend i{background:var(--soft);border:1px solid var(--line);border-radius:4px;position:relative}.heatmap-grid .heatmap-day{display:block;width:16px;min-width:16px;height:16px;min-height:16px;padding:0;margin:0;cursor:pointer}.heatmap-day[data-shade="1"],.heatmap-legend [data-shade="1"]{background:color-mix(in srgb,var(--accent) 25%,var(--panel))}.heatmap-day[data-shade="2"],.heatmap-legend [data-shade="2"]{background:color-mix(in srgb,var(--accent) 45%,var(--panel))}.heatmap-day[data-shade="3"],.heatmap-legend [data-shade="3"]{background:color-mix(in srgb,var(--accent) 70%,var(--panel))}.heatmap-day[data-shade="4"],.heatmap-legend [data-shade="4"]{background:var(--accent)}.heatmap-grid .heatmap-day[aria-pressed=true]{outline:2px solid var(--text);outline-offset:2px}.heatmap-day[aria-current=date]{box-shadow:0 0 0 1px var(--text)}.heatmap-day i{position:absolute;right:2px;bottom:2px;width:3px;height:3px;background:var(--panel);border-radius:50%}.heatmap-legend{display:flex;gap:5px;align-items:center;flex-wrap:wrap;font-size:.75rem;color:var(--muted);margin:10px 0 22px}.heatmap-legend i{width:14px;height:14px}.heatmap-detail{padding:22px;background:var(--soft);border:1px solid var(--line);border-radius:14px;display:grid;grid-template-columns:1fr 1fr;gap:12px}.heatmap-detail h3{font-size:1.5rem;margin:8px 0}.heatmap-detail p{margin:6px 0;line-height:1.5}.heatmap-detail dl{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:0}.heatmap-detail dt{font-size:.75rem;color:var(--muted)}.heatmap-detail dd{margin:4px 0;font-size:1.2rem;font-weight:bold}.heatmap-ratings{display:flex;flex-wrap:wrap;gap:8px;grid-column:1/-1}.heatmap-ratings span{padding:7px 12px;background:var(--panel);border:1px solid var(--line);border-radius:8px;font-size:.85rem}.heatmap-ratings b{margin-left:8px}
.arena-personal{display:flex;flex-direction:column;gap:7px;padding:24px;border-radius:16px;background:var(--soft);border-left:4px solid var(--accent)}.arena-personal strong{font-size:1.4rem}.arena-personal span{color:var(--muted);font-size:.9rem;line-height:1.5}.arena-profile{padding:20px 0;border-bottom:1px solid var(--line)}.arena-profile h3{margin:0 0 8px}.arena-profile p{font-size:.9rem;color:var(--muted)}.arena-profile form,.arena-code-form{display:flex;align-items:end;gap:10px;flex-wrap:wrap}.arena-profile label{flex:1}.arena-profile input{min-width:150px}.arena-leaders{list-style:none;padding:0;margin:0;max-height:370px;overflow-y:auto;border:1px solid var(--line);border-radius:14px}.arena-leaders li{display:flex;align-items:center;gap:14px;padding:14px 18px;border-bottom:1px solid var(--line)}.arena-leaders li:last-child{border-bottom:0}.arena-leaders li.is-you{background:var(--soft);border-left:4px solid var(--accent)}.arena-place{width:34px;flex-shrink:0;text-align:center;font-weight:700;font-size:1.1rem}.arena-person{flex:1;min-width:0}.arena-person>b{overflow-wrap:anywhere;font-size:.95rem}.arena-person small{border:1px solid var(--line);border-radius:10px;padding:2px 6px;margin-left:4px;font-weight:400}.arena-person progress{height:5px;width:100%;display:block;margin-top:9px}.arena-leaders li>strong{text-align:right;min-width:55px}.arena-leaders li>strong small{display:block;font-size:.7rem;color:var(--muted);font-weight:400}.arena-empty{text-align:center;padding:30px 15px;background:var(--soft);border-radius:14px}.arena-empty>span{font-size:2.5rem;color:var(--accent)}.arena-empty h3{font-family:Georgia,serif;font-size:1.4rem}.arena-empty p{color:var(--muted);font-size:.9rem}.arena-challenge-section{margin-top:30px}.arena-section-heading h3{font-size:1.4rem;margin:6px 0}.arena-section-heading p{color:var(--muted);font-size:.9rem}.arena-create{border:1px solid var(--line);border-radius:12px;padding:16px;margin:18px 0}.arena-create summary{font-weight:bold;cursor:pointer}.arena-create form{margin-top:18px}.social-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:14px 0}.arena-code-form{padding:16px 0 22px}.arena-code-form label{flex:1}.arena-challenges{display:grid;grid-template-columns:1fr 1fr;gap:16px}.arena-challenge{padding:22px;border:1px solid var(--line);border-radius:16px;background:var(--panel);min-width:0}.arena-challenge.is-complete{border-color:var(--accent);background:var(--soft)}.arena-challenge-top{display:flex;gap:8px;align-items:center}.arena-glyph{font-size:1.5rem;color:var(--accent)}.arena-tag{border:1px solid var(--line);padding:4px 8px;border-radius:20px;font-size:.7rem}.arena-challenge h3{font-family:Georgia,serif;font-size:1.35rem;margin:15px 0 8px}.arena-challenge p{line-height:1.5;font-size:.9rem;color:var(--muted)}.arena-goal{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.arena-goal strong{font-size:1.5rem}.arena-goal small{font-size:.85rem;font-weight:400;color:var(--muted)}.arena-goal>b{font-size:.75rem;color:var(--accent)}.arena-challenge>progress{height:8px;width:100%;margin:12px 0 0}.arena-actions{display:flex;gap:8px;flex-wrap:wrap}.arena-actions button{font-size:.8rem}.arena-challenge details{margin-top:18px;font-size:.85rem}.arena-challenge details .arena-leaders{margin-top:12px}.arena-challenge .arena-leaders li{padding:10px 8px}.arena-rules{margin-top:28px;border-top:1px solid var(--line);padding-top:20px;font-size:.875rem}.arena-rules li{line-height:1.65;margin:8px 0}.arena-finished{grid-column:1/-1}.arena-finished .arena-challenge{margin-top:12px}#arena-room-result>.arena-challenge{margin-bottom:22px}.study-social-dialog input,.study-social-dialog select{width:100%}.study-social-dialog label{display:block;font-size:.8rem;font-weight:600}.study-social-dialog label>input,.study-social-dialog label>select{display:block;margin-top:6px;min-height:44px}.study-social-dialog button{min-height:40px}.study-social-dialog [hidden]{display:none!important}
@media(max-width:650px){.study-discovery{grid-template-columns:1fr;gap:10px}.study-discovery-card{padding:16px}.study-social-dialog{padding:18px;width:calc(100% - 14px);max-height:96dvh;border-radius:16px}.social-heading{gap:8px}.social-metrics{grid-template-columns:1fr 1fr;gap:8px}.social-metrics>div{padding:12px}.social-metrics strong{font-size:1.5rem}.social-toolbar label{flex:1;min-width:120px}.social-toolbar strong{margin-left:0}.heatmap-detail,.social-form-grid,.arena-challenges{grid-template-columns:1fr}.heatmap-grid{grid-template-rows:repeat(7,24px);grid-template-columns:repeat(var(--heatmap-weeks),24px);gap:5px}.heatmap-grid .heatmap-day{width:24px;min-width:24px;height:24px;min-height:24px}.heatmap-months{grid-template-columns:repeat(var(--heatmap-weeks),24px);gap:5px}.heatmap-weekdays{grid-template-rows:repeat(7,24px);gap:5px;align-items:center}.arena-personal{padding:18px}.arena-personal strong{font-size:1.15rem}.arena-profile form>label{flex-basis:100%}.arena-leaders li{padding:12px 10px;gap:8px}.arena-challenge{padding:18px}}
/* Activity color remains visible under the site's global selected-button rules. */
#heatmap-grid .heatmap-day{background:var(--heatmap-fill,var(--soft))!important}
.heatmap-day[data-shade="1"]{--heatmap-fill:color-mix(in srgb,var(--accent) 25%,var(--panel))}.heatmap-day[data-shade="2"]{--heatmap-fill:color-mix(in srgb,var(--accent) 45%,var(--panel))}.heatmap-day[data-shade="3"]{--heatmap-fill:color-mix(in srgb,var(--accent) 70%,var(--panel))}.heatmap-day[data-shade="4"]{--heatmap-fill:var(--accent)}