/* A quieter frame for the existing lessons and study tools. */
:root{--bg:#f6f7f9;--panel2:#fafbfc;--line:#e0e5ed;--shadow:none}
.sidebar{display:flex;flex-direction:column;padding:26px 16px 17px;background:var(--panel);border-right:1px solid var(--line)}.sidebar .brand{padding:0 10px;margin:0 0 32px;font-size:calc(23px * var(--font-scale,1));gap:10px}.sidebar .brand img{width:27px;height:27px}.nav{margin-top:0;display:flex;flex-direction:column;gap:5px;flex:1;min-height:0;overflow:auto;padding:0 0 20px;scrollbar-width:thin}.nav button,.sidebar-account button{display:flex;align-items:center;gap:12px;width:100%;min-height:45px;border:1px solid transparent;border-radius:8px;padding:11px 13px;font-size:calc(13px * var(--font-scale,1));font-weight:500;text-align:left;color:var(--muted);background:transparent;transform:none;box-shadow:none}.nav button .icon,.sidebar-account .icon,.study-navigation>summary>.icon{width:19px;height:19px;margin:0;flex:none}.nav button:hover,.sidebar-account button:hover{color:var(--text);background:var(--panel2)}.nav button.active,.sidebar-account button.active{color:var(--accent);background:var(--accent-soft);font-weight:650}.nav .study-navigation{border-top:1px solid var(--line);margin-top:18px;padding-top:15px}.study-navigation>summary{display:flex;align-items:center;gap:12px;padding:11px 13px;min-height:45px;border-radius:8px;color:var(--muted);font-size:calc(13px * var(--font-scale,1));cursor:pointer;list-style:none}.study-navigation>summary::-webkit-details-marker{display:none}.study-navigation>summary>.icon:last-child{margin-left:auto;width:14px;height:14px}.study-navigation[open]>summary>.icon:last-child{transform:rotate(180deg)}.study-navigation>div{padding-top:4px}.study-navigation>div>button{padding-left:25px;font-size:calc(12px * var(--font-scale,1));min-height:42px}.study-navigation>summary:hover{background:var(--panel2);color:var(--text)}.study-navigation>summary:focus-visible{outline:3px solid var(--accent);outline-offset:-3px}.sidebar-account{flex:none;display:grid;gap:2px;padding-top:12px;border-top:1px solid var(--line)}.sidebar-account button{min-height:38px;padding:9px 13px;font-size:calc(12px * var(--font-scale,1))}.sidebar-account .icon{width:17px;height:17px}.sidebar-save-note{flex:none;font-size:calc(10px * var(--font-scale,1));color:var(--muted);line-height:1.7;padding:17px 13px 0}.page-view{max-width:1280px;margin-inline:auto}.card,.stat{box-shadow:none;border-radius:13px}.btn{border-radius:8px;box-shadow:none}.btn:hover{transform:none}.pill{border-radius:6px}.hero:not(.profile-hero){min-height:220px;border-radius:14px;padding:30px 34px}.hero.compact:not(.profile-hero){min-height:160px;padding:27px 32px}.hero:not(.profile-hero) h1{font-size:clamp(29px,3vw,39px);letter-spacing:-1.2px;line-height:1.25}.hero .eyebrow{letter-spacing:1.3px;font-size:calc(9px * var(--font-scale,1))}.hero:not(.profile-hero) p{font-size:calc(13px * var(--font-scale,1));line-height:1.8;max-width:590px}.hero .btn{margin-top:18px}.cover-button{border-radius:7px;font-size:calc(10px * var(--font-scale,1))}.grade-card{border-radius:12px;box-shadow:none!important;background:var(--panel)}.grade-card:hover{transform:none!important;border-color:var(--accent)}.grade-card .tile-icon{border-radius:9px}.grade-card p{line-height:1.8}.grade-card .circle-arrow{box-shadow:none}.section-heading{margin-top:30px}.section-heading h2,.card-head h2{font-size:calc(19px * var(--font-scale,1));letter-spacing:-.4px}.section-heading p{font-size:calc(12px * var(--font-scale,1))}.learning-tools-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.learning-tool-card{border-radius:12px;box-shadow:none;min-height:135px;background:var(--panel);padding:21px}.learning-tool-card:hover{transform:none;border-color:var(--accent)}.learning-tool-card strong{font-size:calc(14px * var(--font-scale,1))}.learning-tool-card>span{font-size:calc(12px * var(--font-scale,1));line-height:1.8}.dashboard-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.dashboard-side{grid-column:1/-1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.home-foot{color:var(--muted);font-size:calc(11px * var(--font-scale,1))}.ns-topic-card,.ns-subtopic-card{box-shadow:none}.ns-topic-card:hover{transform:none;box-shadow:none}.ns-topic-card,.ns-subtopic-card,.review-question-card,.exam-panel,.plan-day{border-radius:13px}.tutor-connection-options{margin-top:24px;padding:22px}.tutor-connection-options summary{font-size:calc(13px * var(--font-scale,1));font-weight:650;cursor:pointer;list-style-position:inside}.tutor-connection-options summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}.tutor-connection-options p{font-size:calc(12px * var(--font-scale,1));color:var(--muted);line-height:1.8;margin:16px 0}.tutor-connection-options form{max-width:700px;display:grid;grid-template-columns:1fr 1fr;gap:16px}.tutor-connection-options label{display:grid;gap:7px;font-size:calc(12px * var(--font-scale,1));line-height:1.7}.tutor-connection-options input,.tutor-connection-options select{padding:10px;border:1px solid var(--input-line);border-radius:7px;background:var(--panel);color:var(--text);min-width:0;width:100%;font-size:calc(13px * var(--font-scale,1))}.tutor-connection-options form>p{grid-column:1/-1;margin:0}.tutor-connection-options form>.btn{justify-self:start}.tutor-connection-options [role=status]{font-size:calc(12px * var(--font-scale,1));line-height:1.8;align-self:center;color:var(--muted)}
@media(max-width:1100px){.learning-tools-grid{gap:12px}.learning-tool-card{padding:18px}.hero:not(.profile-hero){min-height:220px}}
@media(max-width:700px){.sidebar{padding:22px 14px 16px}.sidebar .brand{margin-bottom:25px}.nav{padding-bottom:15px}.sidebar-save-note{padding-top:12px}.hero:not(.profile-hero){padding:25px 22px;min-height:225px}.hero.compact:not(.profile-hero){padding:25px 22px;min-height:155px}.hero:not(.profile-hero) h1{font-size:calc(29px * var(--font-scale,1))}.hero .cover-button{top:13px;right:13px}.hero .cover-button span{display:none}.learning-tools-grid{grid-template-columns:minmax(0,1fr);gap:10px}.learning-tool-card{min-height:0;padding:18px}.dashboard-grid{grid-template-columns:minmax(0,1fr);gap:16px}.dashboard-side{grid-column:auto;grid-template-columns:minmax(0,1fr);gap:16px}.section-heading{margin-top:25px}.section-heading h2{font-size:calc(18px * var(--font-scale,1))}.tutor-connection-options form{grid-template-columns:minmax(0,1fr)}.tutor-connection-options form>p{grid-column:auto}}
/* One theme collection, with no empty category tab or horizontal-only row. */
.themes .theme-grid{min-width:0;grid-template-columns:repeat(auto-fit,minmax(145px,1fr));overflow:visible}.themes .theme-option{min-width:0}.themes .theme-name,.themes .theme-option p{overflow-wrap:anywhere}