/* The study ledger uses the existing notebook palette and natural page flow. */
.view-exam { color: var(--ink); }
.view-exam h2 { font-size: 1.1rem; font-weight: 650; }
.view-exam h3 { font-size: .95rem; font-weight: 650; }
.view-exam > .page-heading { gap: 18px; }
.study-page-actions { display: flex; flex-wrap: wrap; gap: 10px; }
#study-strategy-dialog { width: min(720px,calc(100vw - 24px)); padding: 0; background: var(--paper); }
.study-strategy-header { position: sticky; top: 0; z-index: 1; margin: 0; padding: 24px 28px 18px; align-items: flex-start; background: var(--paper); border-bottom: 1px solid var(--line); }
.study-strategy-header h2 { line-height: 1.4; }
#study-strategy-title:focus { outline: none; }
.study-strategy-header p { margin-top: 7px; color: var(--muted); font-size: .8125rem; line-height: 1.6; }
.study-strategy-header .icon-button { flex: 0 0 auto; }
.study-strategy-body { padding: 24px 28px; font-size: .9375rem; line-height: 1.75; }
.study-strategy-body section + section { margin-top: 28px; }
.study-strategy-body h3 { margin: 0 0 10px; font-size: 1rem; font-weight: 650; line-height: 1.45; }
.study-strategy-body p + p { margin-top: 12px; }
.study-strategy-note { color: var(--muted); font-size: .8125rem; }
.study-strategy-steps { padding-left: 22px; }
.study-strategy-steps li { padding-left: 4px; margin-bottom: 12px; }
.study-strategy-timeline { margin-top: 16px; }
.study-strategy-timeline > div { padding: 12px 0; border-top: 1px solid var(--line); }
.study-strategy-timeline dt { font-weight: 650; }
.study-strategy-timeline dd { margin: 3px 0 0; color: var(--muted); }
.study-strategy-capacity { padding: 20px; border-radius: 18px; background: var(--butter); }
.study-strategy-sources { margin-top: 28px; padding-top: 16px; border-top: 1px solid var(--line); font-size: .8125rem; }
.study-strategy-sources summary { cursor: pointer; padding-block: 8px; font-weight: 650; }
.study-strategy-sources p { margin-top: 12px; }
.study-strategy-sources ul { padding-left: 20px; margin-top: 12px; }
.study-strategy-sources li + li { margin-top: 8px; }
.study-strategy-sources a { color: var(--green); text-underline-offset: 3px; }
.study-strategy-footer { display: flex; justify-content: flex-end; margin-top: 28px; }
@media(max-width:600px) {
 .study-page-actions { width: 100%; }
 .study-page-actions .button { flex: 1 1 auto; justify-content: center; min-height: 44px; }
 .study-strategy-header { padding: 20px 18px 16px; }
 .study-strategy-body { padding: 20px 18px; }
 .study-strategy-capacity { padding: 16px; }
}
.exam-countdowns { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.exam-date { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 25px; border: 1px solid var(--outline); border-radius: 24px; background: var(--sky); }
.exam-date.tone-1 { background: var(--lilac); }
.exam-date h2 { margin: 0 0 7px; }
.exam-date p { margin: 0; font-size: .875rem; }
.exam-remaining { display: grid; flex: 0 0 auto; gap: 3px; text-align: right; }
.exam-remaining strong { font-size: clamp(2rem,4vw,3rem); font-weight: 600; line-height: 1.1; font-variant-numeric: tabular-nums; }
.exam-remaining span { font-size: .75rem; }
.study-caption,.study-storage { color: var(--muted); font-size: .8125rem; line-height: 1.6; margin: 13px 0 22px; overflow-wrap: anywhere; }
.study-caption a { color: inherit; text-underline-offset: 3px; }
.study-totals { display: flex; flex-wrap: wrap; gap: 24px 38px; padding: 25px 0 6px; }
.study-totals > div { display: grid; gap: 5px; }
.study-totals strong { font-size: 1.7rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.study-totals span { color: var(--muted); font-size: .8125rem; }
.study-chart-grid { display: grid; grid-template-columns: minmax(0,1.35fr) minmax(0,1fr); gap: 22px; margin: 25px 0 40px; align-items: start; }
.study-chart { min-width: 0; padding: 23px; border: 1px solid var(--line); border-radius: 24px; background: white; }
.study-chart h2 { margin: 0 0 23px; }
.study-bars { display: grid; gap: 17px; }
.study-bar-row > div:first-child { display: flex; justify-content: space-between; align-items: baseline; gap: 14px; margin-bottom: 7px; font-size: .8125rem; line-height: 1.45; }
.study-bar-row strong { flex: 0 0 auto; font-size: .8125rem; font-variant-numeric: tabular-nums; }
.study-track { height: 10px; border-radius: 6px; background: var(--paper); overflow: hidden; }
.study-bar-fill { display: block; height: 100%; background: #90bd90; border-radius: inherit; }
.study-bar-fill.tone-1 { background: #b49bc7; }
.study-bar-fill.tone-2 { background: #7bb4be; }
.study-section { border-top: 1px solid var(--line); margin-top: 8px; padding-top: 4px; }
.study-section > summary,.study-filter-details > summary { cursor: pointer; padding: 20px 0; font-size: 1rem; font-weight: 650; min-height: 44px; }
.study-section > summary > span + span { margin-left: 12px; color: var(--muted); font-size: .8125rem; font-weight: 500; }
.study-filter-details { margin-top: 24px; }
.study-filter-details > summary { padding-block: 9px; font-size: .875rem; }
.study-filter-fields { display: grid; grid-template-columns: 1.1fr 1fr 1fr; gap: 14px; margin-top: 15px; }
.study-filter-fields label { min-width: 0; }
.study-filter-actions,.study-export-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 16px 0 24px; }
.study-topic,.study-history-row { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 21px 0; border-top: 1px solid var(--line); }
.study-topic > div:first-child,.study-history-row > div:first-child { min-width: 0; }
.study-topic-meta { font-size: .75rem; color: var(--muted); }
.study-topic h3,.study-history-row h3 { margin: 6px 0; line-height: 1.5; overflow-wrap: anywhere; }
.study-topic p,.study-history-row p { font-size: .8125rem; color: var(--muted); margin: 4px 0; line-height: 1.6; overflow-wrap: anywhere; }
.study-topic small,.study-history-row small { font-size: .75rem; color: var(--muted); }
.study-topic-state { display: grid; gap: 7px; flex: 0 0 auto; justify-items: end; font-size: .8125rem; }
.study-topic .text-button,.study-history-row .text-button { min-height: 44px; }
.study-more { margin: 14px 0 24px; }
.study-empty { padding: 17px 0 12px; }
.study-empty p { color: var(--muted); line-height: 1.6; max-width: 65ch; }
.study-resume { padding: 23px; background: var(--butter); border-radius: 24px; margin: 26px 0; }
.study-resume h2 { margin: 0 0 16px; font-size: 1rem; }
.study-resume-row { display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.study-resume-row + .study-resume-row { margin-top: 20px; }
.study-resume-row strong { font-size: .9375rem; overflow-wrap: anywhere; }
.study-resume-row p { font-size: .8125rem; line-height: 1.6; margin: 7px 0 0; }
.study-resume-actions { display: grid; gap: 7px; flex: 0 0 auto; }
.study-resume.is-compact { margin: 0; padding: 17px 20px; }
.study-resume.is-compact .study-resume-row { align-items: flex-start; flex-wrap: wrap; gap: 12px; }
.study-resume.is-compact .study-resume-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 15px; }
#study-resume-slot:empty { display: none; }
.study-exam-facts { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 20px; margin: 20px 0 28px; }
.study-exam-facts p { display: grid; gap: 7px; font-size: .8125rem; line-height: 1.6; }
.study-section > h3 { margin: 28px 0 20px; }
.study-storage { margin-top: 32px; }
#study-dialog { width: min(620px,calc(100vw - 30px)); }
#study-dialog .study-extra { margin-top: 8px; border-top: 1px solid var(--line); padding-top: 6px; }
#study-dialog .study-extra > summary { cursor: pointer; padding: 14px 0; min-height: 44px; }
#study-dialog .study-extra label { margin-top: 14px; }
.study-answer-row { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 10px; }
.study-video-fields { margin-top: 14px; }
.task-link-help { margin: -3px 0 14px; }
.study-analysis-heading,.study-catalog-heading,.study-chart-heading { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.study-analysis-heading { margin-top: 36px; }
.study-analysis-heading h2 { margin: 0; }
.study-segmented { display: inline-flex; gap: 3px; padding: 4px; background: #e9eeeb; border-radius: 24px; flex: 0 0 auto; }
.study-segmented button { min-height: 38px; padding: 8px 13px; border: 0; border-radius: 20px; background: transparent; font: inherit; font-size: .75rem; white-space: nowrap; color: var(--ink); cursor: pointer; }
.study-segmented button[aria-pressed='true'] { background: var(--ink); color: white; }
.study-totals { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 0; padding: 24px 0 20px; margin-top: 8px; border-bottom: 1px solid var(--line); }
.study-totals > div { padding-inline: 22px; border-left: 1px solid var(--line); }
.study-totals > div:first-child { padding-left: 0; border-left: 0; }
.study-totals strong { font-size: clamp(1.55rem,3vw,2.15rem); letter-spacing: -.03em; }
.study-chart-heading { align-items: flex-start; }
.study-chart-heading h2 { margin-bottom: 6px; }
.study-chart-heading p { margin: 0; font-size: .75rem; color: var(--muted); }
.study-trend-total { display: flex; align-items: baseline; gap: 9px; margin-top: 22px; }
.study-trend-total strong { font-size: 2rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.study-trend-total span { font-size: .8125rem; color: var(--muted); }
.study-trend-plot { display: grid; grid-template-columns: repeat(7,minmax(0,1fr)); align-items: end; gap: 12px; margin-top: 19px; }
.study-trend-column { display: grid; grid-template-rows: 22px 140px 22px 17px; gap: 7px; justify-items: center; }
.study-trend-value,.study-trend-day { font-size: .75rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.study-trend-column small { font-size: .6875rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.study-trend-lane { position: relative; width: min(100%,32px); height: 140px; border-radius: 9px; background: #f1f4f1; overflow: hidden; }
.study-trend-lane > span { position: absolute; inset: auto 0 0; border-radius: inherit; background: #9dbfbe; }
.study-trend-lane > span.is-latest { background: #759b87; }
.study-trend > .study-caption { margin-bottom: 0; }
.study-distribution h3 { margin-top: 24px; padding-top: 21px; border-top: 1px solid var(--line); }
.study-kind-list { display: grid; gap: 14px; margin: 18px 0 0; }
.study-kind-list > div { display: flex; justify-content: space-between; align-items: center; gap: 15px; font-size: .8125rem; }
.study-kind-list dt { display: flex; align-items: center; gap: 9px; }
.study-kind-list dd { margin: 0; font-variant-numeric: tabular-nums; }
.study-kind-dot { display: block; width: 7px; height: 7px; border-radius: 50%; background: #759b87; }
.study-kind-dot.tone-1 { background: #b49bc7; }
.study-kind-dot.tone-2 { background: #7bb4be; }
.study-catalog { margin: 10px 0 30px; padding: 25px; background: white; border: 1px solid var(--line); border-radius: 24px; }
.study-catalog-heading h2 { margin: 0 0 7px; }
.study-catalog-heading p { margin: 0; font-size: .8125rem; color: var(--muted); }
.study-topic-completion { font-size: .75rem; font-weight: 600; padding: 9px 12px; border-radius: 18px; background: var(--mint); white-space: nowrap; }
.study-search { display: flex; align-items: center; gap: 12px; margin-top: 23px; padding: 0 15px; border: 1px solid #9caaa1; background: #fafcfb; border-radius: 16px; }
.study-search:focus-within { border-color: var(--ink); outline: 3px solid var(--lilac); }
.study-search svg { width: 20px; height: 20px; flex: 0 0 auto; color: var(--muted); }
.study-search input { width: 100%; min-width: 0; border: 0; border-radius: 0; box-shadow: none; outline: none; padding: 15px 0; min-height: 52px; background: transparent; }
.study-search input:focus { outline: none; box-shadow: none; }
.study-search > button { font-size: .75rem; min-height: 44px; flex: 0 0 auto; }
.study-topic-filters { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; margin-top: 17px; }
.study-status-filters { display: flex; flex-wrap: wrap; gap: 5px; }
.study-status-filters button { min-height: 38px; border: 1px solid transparent; padding: 7px 10px; border-radius: 18px; background: transparent; font: inherit; font-size: .75rem; color: var(--muted); cursor: pointer; }
.study-status-filters button[aria-pressed='true'] { border-color: var(--line); background: var(--paper); color: var(--ink); }
.study-result-count { font-size: .8125rem; font-weight: 600; margin: 21px 0 12px; }
.study-result-count > span:last-child { font-weight: 500; color: var(--muted); font-size: .75rem; }
.study-topic-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: .75rem; color: var(--muted); }
.study-exam-tag { display: inline-block; padding: 4px 8px; border-radius: 10px; background: var(--sky); color: var(--ink); font-weight: 600; font-size: .6875rem; }
.study-exam-tag.is-oabt { background: var(--lilac); }
.study-status { font-size: .75rem; font-weight: 600; padding: 5px 9px; border-radius: 12px; background: var(--paper); }
.study-status.status-completed { background: var(--mint); }
.study-status.status-review { background: var(--butter); }
.study-status.status-learning { background: var(--sky); }
.study-search-empty { padding: 26px 0; }
.study-search-empty p { color: var(--muted); font-size: .875rem; }
@media(hover:hover) { .study-segmented button:hover:not([aria-pressed='true']),.study-status-filters button:hover { background: #dce6df; color: var(--ink); } }
.task-video-field[hidden],[hidden].study-video-fields,[hidden].study-question-field,[hidden].study-test-field,[hidden].study-answers { display: none; }
@media(max-width:900px) { .study-chart-grid { grid-template-columns: 1fr; gap: 20px; } .study-filter-fields { grid-template-columns: repeat(2,minmax(0,1fr)); } .exam-date { padding: 20px; } }
@media(max-width:600px) {
 .exam-countdowns { grid-template-columns: 1fr; gap: 12px; }
 .exam-date { padding: 21px; }
 .study-totals { gap: 0; }
 .study-totals > div { padding-inline: 12px; }
 .study-analysis-heading { align-items: flex-start; flex-direction: column; gap: 14px; }
 .study-segmented button,.study-status-filters button { min-height: 44px; }
 .study-catalog { padding: 20px 16px; }
 .study-catalog-heading { align-items: flex-start; flex-direction: column; gap: 12px; }
 .study-result-count > span:last-child { display: block; margin-top: 6px; line-height: 1.6; }
 .study-search { padding-inline: 10px; gap: 8px; }
 .study-search svg { width: 17px; }
 .study-search > button { font-size: .6875rem; }
 .study-search input { font-size: 1rem; }
 .study-topic-filters { gap: 15px; }
 .study-status-filters { gap: 4px; }
 .study-status-filters button { padding-inline: 8px; }
 .study-chart-heading { gap: 12px; }
 .study-chart-heading .study-segmented button { padding-inline: 10px; }
 .study-trend-plot { gap: 6px; }
 .study-totals strong { font-size: 1.45rem; }
 .study-totals span { font-size: .75rem; }
 .study-chart { padding: 20px 17px; }
 .study-topic,.study-history-row { align-items: flex-start; flex-direction: column; gap: 8px; }
 .study-topic-state { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; width: 100%; }
 .study-topic-state .text-button { margin-left: auto; }
 .study-section > summary > span { display: inline; }
 .study-section > summary > span + span { margin-left: 8px; font-size: .75rem; }
 .study-resume-row { flex-direction: column; align-items: flex-start; gap: 14px; }
 .study-resume-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
 .study-exam-facts { grid-template-columns: 1fr; gap: 4px; }
 .study-filter-fields { grid-template-columns: 1fr; }
 .study-bar-row > div:first-child { gap: 9px; }
}

/* A dedicated topic shelf: searchable cards, with one clear action per topic. */
.view-topics { color: var(--ink); }
.view-topics .study-catalog { margin: 0; padding: 0; border: 0; border-radius: 0; background: transparent; }
.view-topics .study-catalog-heading { margin-bottom: 20px; }
.view-topics .study-catalog-heading h2 { font-size: 1.125rem; font-weight: 650; }
.topic-touched-count { font-size: .8125rem; color: var(--muted); }
.topic-touched-count strong { color: var(--ink); font-weight: 650; }
.topic-toolbar { padding: 18px; border: 1px solid var(--line); border-radius: 24px; background: white; }
.topic-toolbar .study-search { margin-top: 0; border-color: transparent; background: var(--paper); }
.view-topics .study-search input { background: transparent; border: 0; box-shadow: none; }
.topic-course-row { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin: 14px 0; }
.topic-course-filter { flex: 1 1 240px; min-width: 0; margin: 0; }
.topic-course-filter .ts-wrapper { margin: 0; }
.topic-toolbar .study-status-filters { padding-top: 14px; border-top: 1px solid var(--line); }
.topic-toolbar .study-status-filters button { min-height: 44px; padding-inline: 14px; }
#study-topic-results { display: grid; grid-template-columns: repeat(auto-fill,minmax(min(100%,280px),1fr)); gap: 16px; align-items: stretch; }
#study-topic-results .study-topic { display: flex; flex-direction: column; align-items: stretch; justify-content: flex-start; gap: 18px; padding: 20px; border: 1px solid var(--line); border-radius: 24px; background: white; min-width: 0; }
.study-topic-top { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.study-topic-top .study-status { display: inline-flex; align-items: center; gap: 5px; padding: 7px 10px; }
.study-status svg { width: 14px; height: 14px; }
.study-topic-top .study-exam-tag { padding: 7px 10px; font-size: .75rem; }
.view-topics .study-topic .study-topic-course { margin: 0 0 8px; font-size: .75rem; color: var(--muted); }
.view-topics .study-topic h3 { margin: 0 0 8px; font-size: 1.0625rem; font-weight: 650; letter-spacing: -.025em; line-height: 1.45; }
.view-topics .study-topic-copy > p:not(.study-topic-course) { margin: 0; font-size: .8125rem; line-height: 1.6; }
.view-topics .study-topic-copy small { display: block; margin-top: 10px; }
.study-topic-bottom { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding-top: 16px; margin-top: auto; border-top: 1px solid var(--line); }
.study-topic-metrics { display: flex; flex-wrap: wrap; gap: 12px; font-size: .75rem; color: var(--muted); }
.study-topic-metrics strong { color: var(--ink); font-size: .9375rem; font-weight: 650; font-variant-numeric: tabular-nums; }
.study-topic-add { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 44px; padding: 10px 13px; border: 0; border-radius: 22px; background: var(--ink); color: white; font: inherit; font-size: .75rem; font-weight: 600; cursor: pointer; }
.study-topic-add svg { width: 16px; height: 16px; }
#study-topic-results .study-more,#study-topic-results .study-search-empty { grid-column: 1 / -1; }
#study-topic-results .study-more { justify-self: center; margin: 8px 0; }
.study-search-empty { text-align: center; padding: 40px 20px; }
.study-search-empty > svg { width: 36px; height: 36px; color: #52695c; margin-bottom: 14px; }
.study-search-empty h3 { margin-bottom: 8px; }
.study-search-empty p { margin-bottom: 20px; }

/* The record sheet starts with the selected topic, then only the fields for this activity. */
#study-dialog { width: min(620px,calc(100vw - 24px)); }
#study-dialog .dialog-header { align-items: flex-start; margin-bottom: 20px; }
.study-dialog-intro { margin-top: 7px; color: var(--muted); font-size: .8125rem; line-height: 1.6; }
#study-dialog .study-selected-topic { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 20px; padding: 16px; border-radius: 18px; background: #e7f3df; }
#study-dialog .study-selected-topic > div { min-width: 0; }
.study-selected-topic span { display: block; margin-bottom: 6px; font-size: .75rem; color: #42573d; line-height: 1.5; }
.study-selected-topic strong { display: block; font-size: 1rem; font-weight: 650; line-height: 1.45; overflow-wrap: anywhere; }
.study-selected-topic .text-button { min-height: 44px; flex: 0 0 auto; font-size: .8125rem; }
.study-kind-options { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 4px; padding: 4px; border-radius: 18px; background: #e9eeeb; margin: 20px 0; }
.study-kind-options button { min-height: 44px; padding: 8px 4px; border: 0; border-radius: 14px; background: transparent; color: var(--muted); font: inherit; font-size: .8125rem; font-weight: 600; cursor: pointer; }
.study-kind-options button[aria-pressed='true'] { background: var(--ink); color: white; }
#study-dialog .study-amounts { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; margin: 20px 0; align-items: start; }
#study-dialog .study-amounts label { margin: 0; font-size: .8125rem; }
#study-dialog .study-amounts .optional { display: inline; margin-left: 3px; font-size: .75rem; }
#study-dialog .study-amounts input[type='number'] { min-height: 66px; padding: 12px; font-size: 1.75rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.study-quick-amounts { display: flex; gap: 8px; margin-top: 8px; }
.study-quick-amounts button { flex: 1; min-height: 44px; padding: 6px; border: 1px solid var(--line); border-radius: 12px; background: white; color: var(--ink); font: inherit; font-size: .8125rem; cursor: pointer; }
#study-dialog .study-record-details { align-items: start; margin-bottom: 20px; }
#study-dialog .study-extra > summary { display: flex; align-items: center; justify-content: space-between; gap: 12px; list-style: none; font-size: .8125rem; }
#study-dialog .study-extra > summary::-webkit-details-marker { display: none; }
#study-dialog .study-extra > summary svg { width: 17px; height: 17px; flex: 0 0 auto; }
#study-dialog .study-extra[open] > summary svg { transform: rotate(180deg); }
#study-dialog .dialog-footer { position: sticky; bottom: -28px; z-index: 1; background: var(--paper); margin-top: 20px; padding-block: 16px; }
#study-dialog #study-error { margin-top: 16px; padding: 12px; background: #fce8e5; border-radius: 12px; line-height: 1.6; }
#study-dialog #study-error:focus { outline: 2px solid var(--red); outline-offset: 2px; }
#study-dialog input:not([type='hidden']),#study-dialog textarea { min-width: 0; font-size: 1rem; }
#study-dialog .study-kind-storage[hidden],#study-dialog .study-selected-topic[hidden],#study-dialog .study-topic-picker[hidden] { display: none; }
@media (hover:hover) {
 .study-topic-add:hover { background: #34433a; }
 .study-quick-amounts button:hover { background: var(--sky); }
 .study-kind-options button:not([aria-pressed='true']):hover { color: var(--ink); background: #dce6df; }
}
.study-topic-add:active,.study-quick-amounts button:active { transform: scale(.97); }
@media (max-width:700px) {
 .app-header .nav-list { width: min(100%,410px); justify-content: center; gap: 2px; }
 .app-header .nav-button { flex: 1 1 0; width: auto; min-width: 0; max-width: 46px; padding: 10px 6px; }
 .app-header .nav-button svg { width: 20px; height: 20px; }
}
@media (max-width:600px) {
 .view-topics .study-catalog-heading { align-items: flex-start; }
 .topic-toolbar { padding: 14px; border-radius: 22px; }
 .topic-course-filter { flex-basis: 100%; }
 .topic-toolbar .study-status-filters { gap: 4px; }
 .topic-toolbar .study-status-filters button { padding-inline: 10px; }
 #study-dialog .dialog-footer { bottom: -20px; }
 #study-dialog .study-amounts { gap: 12px; }
 #study-dialog .study-record-details { grid-template-columns: minmax(0,1fr); gap: 14px; }
 #study-dialog .dialog-actions { width: 100%; }
 #study-dialog .dialog-actions > button { flex: 1; justify-content: center; }
}