.dashboard-nav{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 22px}
.dashboard-nav a{text-decoration:none}
.grades-screen{position:fixed;inset:0;z-index:35;display:flex;flex-direction:column;background:var(--bg);color:var(--ink);padding:env(safe-area-inset-top,0px) env(safe-area-inset-right,0px) env(safe-area-inset-bottom,0px) env(safe-area-inset-left,0px)}
.grades-header{flex-shrink:0;display:flex;align-items:center;justify-content:flex-start;gap:24px;padding:18px 28px;border-bottom:1px solid var(--line);background:var(--surface)}
.grades-header .dash-eyebrow{margin:0}.grades-header h1{font:700 28px/1.3 var(--sans);margin:4px 0;max-width:none}
.grades-content{flex:1;min-height:0;overflow:auto;padding:28px;scrollbar-gutter:stable}
.grades-content>.gradebook{max-width:1280px;margin:0 auto}
.course-report-header{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:26px;border-bottom:1px solid var(--line);background:var(--surface)}
.course-report-header h2{font:700 28px/1.4 var(--sans);margin:8px 0}.course-report-header p{margin:6px 0;color:var(--muted)}
.course-letter{display:grid;justify-items:center;min-width:145px;padding:20px;border:1px solid var(--line);border-radius:14px;background:var(--soft)}
.course-letter strong{font:800 48px/1.1 var(--sans)}.course-letter span{font:700 21px/1.6 var(--sans)}.course-letter small{font:12px/1.6 var(--sans);color:var(--muted)}
.grade-scale{font:12px/1.8 var(--sans);color:var(--muted)}
.gradebook-body>.dash-help:first-child{padding-top:20px}
.grade-table .letter-cell{font-weight:800;font-size:19px}
[data-design="chalk"] .grades-screen{inset:10px}
@media(max-width:600px){.grades-header{padding:14px;gap:14px;flex-wrap:wrap}.grades-content{padding:14px}.course-report-header{padding:18px;align-items:flex-start;flex-wrap:wrap}.course-letter{min-width:120px;justify-items:start;padding:14px}.course-letter strong{font-size:36px}}
.gradebook{margin:24px 0;scroll-margin-top:20px;min-width:0}
.gradebook-panel{border:1px solid var(--line);border-radius:18px;background:var(--surface);overflow:hidden}
.gradebook-panel>summary{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px;cursor:pointer;list-style:none}
.gradebook-panel>summary::-webkit-details-marker{display:none}
.gradebook-panel>summary strong{display:block;font:700 23px/1.4 var(--serif)}
.gradebook-panel>summary small{display:block;color:var(--muted);font:13px/1.7 var(--sans)}
.gradebook-panel>summary:focus-visible{outline:3px solid var(--accent);outline-offset:-4px}
.gradebook-body{padding:0 20px 20px;min-width:0}
.grade-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:18px 0}
.grade-metrics>div{background:var(--soft);border-radius:12px;padding:16px;min-width:0}
.grade-metrics strong{display:block;font:700 25px/1.5 var(--sans);overflow-wrap:anywhere}
.grade-metrics span{font:12px/1.6 var(--sans);color:var(--muted)}
.grade-controls{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;margin:20px 0}
.grade-controls label{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;min-width:0}
.grade-controls select{max-width:100%;padding:10px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink);font:inherit}
.grade-table-scroll{max-width:100%;overflow:auto;border:1px solid var(--line);border-radius:12px;margin:16px 0}
.grade-table{border-collapse:collapse;width:100%;min-width:720px;text-align:left;font:13px/1.7 var(--sans)}
.grade-table caption{padding:12px;text-align:left;font-weight:700;background:var(--bg)}
.grade-table th,.grade-table td{padding:12px;border-bottom:1px solid var(--line);vertical-align:top}
.grade-table thead{background:var(--soft)}
.grade-table th[scope="row"]{max-width:280px;min-width:210px;font-weight:600}
.grade-table th small{display:block;color:var(--muted);font-weight:400}
.grade-table tr[hidden]{display:none}
.grade-history{min-width:170px;max-width:320px}
.grade-history summary,.practice-grades>summary{cursor:pointer;color:var(--accent);font-weight:600}
.grade-history ol{padding-left:20px}.grade-history li{margin:10px 0}.grade-history time{display:block;color:var(--muted);font-size:11px}
.practice-grades{padding:16px;border:1px solid var(--line);border-radius:12px;margin:20px 0}
.welcome-tour{border:2px solid var(--accent);border-radius:18px;background:var(--surface);padding:24px;margin:18px 0 24px;scroll-margin-top:20px}
.welcome-tour[hidden]{display:none}
.tour-progress{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}
.tour-progress span{display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;width:32px;height:32px;font:600 14px var(--sans)}
.tour-progress [aria-current]{background:var(--accent);color:var(--accent-ink);outline:2px solid var(--accent);outline-offset:3px}
.tour-playground{padding:18px;border:1px solid var(--line);border-radius:14px;background:var(--bg);min-width:0}
.tour-playground button{margin:6px 8px 6px 0;min-height:44px;max-width:100%;white-space:normal}
.tour-playground label{display:grid;gap:8px;margin:12px 0}
.tour-playground input{font:16px var(--sans);color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:10px;max-width:100%;min-width:0}
.tour-playground input[type=range]{width:100%;accent-color:var(--accent)}
.tour-playground input[type=color]{padding:3px;width:64px;height:44px}
.tour-task-status{font:600 15px/1.7 var(--sans);color:var(--accent);margin-top:12px}
.tour-mini-card{padding:16px;border:1px solid var(--line);border-radius:12px}
.tour-library-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;border-bottom:1px solid var(--line);padding:8px 0}
.tour-tool-demo svg{width:100%;max-height:250px;display:block;overflow:hidden}
.tour-playground [aria-pressed=true]{border-color:var(--accent);background:var(--soft)}
.tour-reading-preview{padding:16px;border:1px solid var(--line);border-radius:12px}
.tour-reading-preview.tour-readable{font:19px/1.9 system-ui,sans-serif;letter-spacing:.03em}
.tour-reading-preview.tour-reduced{transition:none;animation:none;border-style:dashed}
@media(max-width:540px){.tour-playground{padding:12px}.tour-actions>.btn{width:100%}.tour-tool-tabs{display:flex;flex-wrap:wrap}}
.welcome-tour h2{font:600 28px/1.4 var(--serif);margin:8px 0 12px}
.welcome-tour>p:not(.dash-eyebrow){max-width:75ch;font:16px/1.8 var(--sans)}
.tour-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:20px 0 12px}
.tour-actions button:disabled{opacity:.5;cursor:default}
.locked-subjects{margin:36px 0 20px;padding-top:24px;border-top:1px solid var(--line)}
.locked-subjects h2{font:600 28px/1.4 var(--serif);margin:0 0 12px}
.locked-course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.locked-course{display:flex;flex-direction:column;align-items:flex-start;gap:8px;text-align:left;padding:20px;border:1px solid var(--line);border-radius:14px;background:var(--surface);color:var(--muted);cursor:not-allowed;min-width:0;opacity:.8}
.locked-course strong{font:600 19px/1.4 var(--sans);overflow-wrap:anywhere}.locked-course small{font:12px/1.6 var(--sans)}
.dash-path>.pill{display:inline-flex;margin:6px 0}
[data-a11y-focusring="strong"] .gradebook-panel>summary{outline-offset:-5px!important}
@media(max-width:760px){.locked-course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:540px){.grade-metrics{grid-template-columns:minmax(0,1fr)}.gradebook-body{padding:0 12px 16px}.gradebook-panel>summary,.welcome-tour{padding:16px}.locked-course-grid{grid-template-columns:minmax(0,1fr)}.grade-controls select{width:100%}.grade-controls label{width:100%}}

.subject-picker{padding:18px;border:1px solid var(--line);border-radius:12px;background:var(--surface);margin:20px 0}.subject-picker select{padding:12px;border-radius:8px;background:var(--bg);color:var(--ink);border:1px solid var(--line);max-width:100%;font:inherit}.subject-picker label{font-weight:700}.locked-course[href]{cursor:pointer;text-decoration:none;opacity:1}.math-lab-dialog{width:min(800px,94vw);max-height:90dvh;overflow:auto;border:1px solid var(--line);border-radius:18px;background:var(--bg);color:var(--ink);padding:24px}.math-lab-dialog::backdrop{background:rgba(0,0,0,.55)}.lab-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:20px 0}.math-lab-dialog label{display:flex;flex-direction:column;gap:6px;margin:10px 0;min-width:0}.math-lab-dialog input,.math-lab-dialog select{padding:10px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font:inherit;max-width:100%;min-width:0}#lab-surface{width:100%;height:auto;display:block;margin-top:20px;border:1px solid var(--line);background:var(--surface)}@media(max-width:540px){.lab-fields{grid-template-columns:minmax(0,1fr)}}

.math-lab-dialog textarea{width:100%;padding:12px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font:inherit;resize:vertical}

.study-controls button{min-height:44px}