/* Extend the ink-blue and orange Hanzi Spark identity. */
[hidden]{display:none!important}
.side{overflow-y:auto}.nav{gap:3px;margin-top:24px}.nav button{padding:9px 12px}.nav-caption{font-size:.75rem;letter-spacing:.12em;color:var(--nav-text);margin:16px 12px 5px}.streak b{font-size:1rem}.streak{margin-top:24px}
body[data-extra-view="course"] .toolbar,body[data-extra-view="course"] .top>.progress{display:none}
#course{display:grid;gap:24px}#course h2{font-size:clamp(1.65rem,3.5vw,2.25rem);line-height:1.2;letter-spacing:-.025em;margin:12px 0}#course h3{font-size:1.2rem;margin:0 0 12px}#course h4{font-size:1rem;margin:12px 0 6px}#course p{line-height:1.55}#course button{min-height:44px}#course .queue{margin:0;min-width:0}#course small,.course-dialog small{font-size:.875rem;line-height:1.4}
.course-toolbar,.course-section-title{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.course-chip{font-size:.875rem;color:var(--blue);font-weight:650}.course-overview{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(250px,1fr);gap:20px}.course-session{background:var(--ink);color:white;border-radius:22px;padding:30px;position:relative;overflow:hidden}.course-session .tag{color:#ffc09e;background:#ffffff12}.course-session p{color:#d7e2f3}.course-session .primary{background:var(--brand);border-color:var(--brand);color:#fff}.course-session .secondary{border-color:#52627b;background:transparent;color:white}.course-session-action{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 14px}.course-plan{font-size:.9rem}.course-session-size{display:block;font-size:.875rem}.course-session-size select{display:block;max-width:100%;margin-top:7px;background:#263955;color:white;border:1px solid #718099;border-radius:8px;padding:8px;font:inherit}.course-next{padding:28px;background:var(--blue-soft);border:1px solid var(--line);border-radius:22px}.course-next h3{margin-top:16px!important}.course-next hr{border:0;border-top:1px solid #cad5e5;margin:24px 0}
.course-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.course-metric{border-top:3px solid var(--accent);border-radius:12px;background:white;box-shadow:0 3px 12px #17243c06;padding:20px 18px;display:flex;flex-direction:column;gap:8px}.course-metric>span{font-weight:650}.course-metric>strong{font-size:2rem;line-height:1.2;letter-spacing:-.04em}.course-metric small{color:var(--muted)}
.course-two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.course-skill-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:16px}.course-skill-grid article>div:first-child{display:flex;justify-content:space-between;gap:10px}.course-skill-grid article>div>span{color:var(--muted);font-size:.875rem}.course-bar{height:9px;position:relative;background:var(--soft);border-radius:9px;overflow:hidden;margin:12px 0 7px}.course-bar i,.course-bar b{display:block;position:absolute;height:100%;top:0;left:0;border-radius:9px;background:#a5bddf}.course-bar b{background:var(--blue)}.course-legend{font-size:.875rem;color:var(--muted);display:flex;gap:24px;flex-wrap:wrap;margin-bottom:0}
.course-homework label{display:flex;align-items:flex-start;gap:12px;padding:12px 0}.course-homework input{margin-top:6px;width:20px;height:20px;accent-color:var(--accent);flex-shrink:0}.course-homework input:checked+span{text-decoration:line-through;opacity:.7}.course-homework small{display:block;color:var(--muted);margin-top:4px}.course-homework strong{white-space:pre-wrap;overflow-wrap:anywhere}
.course-lesson-picker{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:7px}.course-lesson-picker button{border:1px solid var(--line);border-radius:10px;background:white;padding:10px 5px;font-weight:700}.course-lesson-picker button[aria-pressed="true"]{background:var(--ink);color:white;border-color:var(--ink)}.course-lesson-picker small{display:block;font-size:.75rem!important;min-height:18px;font-weight:400}.course-lesson-heading{display:flex;justify-content:space-between;align-items:center;gap:20px}.course-lesson-heading p{margin-bottom:0}.course-locked{padding:36px!important}.course-locked button{margin:8px 8px 0 0}.course-words{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.course-word{border:1px solid var(--line);padding:18px;border-radius:12px;min-width:0}.course-word>div:first-child{display:flex;flex-direction:column;gap:5px}.course-word strong{font-size:2rem;font-weight:600;line-height:1.4;overflow-wrap:anywhere}.course-word small{color:var(--muted)}.course-word>.course-badge{display:inline-block;font-size:.75rem;color:var(--blue);padding:4px 7px;border-radius:6px;background:var(--blue-soft);margin:10px 0}.course-word button{font-size:.875rem;padding:8px 10px}.course-word details{margin-top:12px;font-size:.875rem}.course-word details p{margin-top:8px}.course-word details small{font-size:.75rem!important}.course-word .context:empty{display:none}.course-pattern{background:var(--soft);padding:14px;border-radius:10px;color:var(--blue);font-weight:600}.course-example{font-size:1.45rem;line-height:1.7!important}.course-class-note{padding:12px 0;border-top:1px solid var(--line);margin-top:15px}.course-class-note small{display:block}.course-class-note p,.course-history-row p{white-space:pre-wrap;overflow-wrap:anywhere}
.course-weak-list{display:grid;gap:12px}.course-weak-list article{display:flex;align-items:center;justify-content:space-between;gap:16px}.course-weak-list strong{font-size:1.3rem}.course-weak-list span{margin-left:14px;font-size:.875rem;color:var(--blue)}.course-weak-list p{margin-bottom:0}.course-confusions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.course-confusions article{border:1px solid var(--line);border-radius:12px;padding:16px;min-width:0}.course-confusions button{font-size:.875rem;padding:7px 10px}.course-confusions .button-row{margin-top:10px}.course-confusions p{font-size:.875rem}.course-confusions .context:empty{display:none}
.course-history-row{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;padding:16px 0;border-top:1px solid var(--line)}.course-checkpoint-history{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.course-checkpoint-history span,.course-checkpoint-history small{display:block;margin-top:5px}.course-source{font-size:.875rem;color:var(--muted);border-top:1px solid var(--line);padding-top:16px}.course-source a{color:var(--blue)}
.course-dialog{border:1px solid var(--line);border-radius:20px;background:var(--paper);color:var(--ink);padding:28px;width:min(760px,calc(100vw - 24px));max-height:calc(100dvh - 36px);overflow:auto;box-shadow:var(--shadow);font-size:1rem}.course-dialog::backdrop{background:#101a2a99}.course-dialog-top{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:20px}.course-dialog-top h2{margin:0;font-size:1.5rem}.course-dialog-top p{margin:8px 0 0}.course-dialog label:not(.course-inline-check),.course-dialog input:not([type="checkbox"]),.course-dialog textarea,.course-dialog select{display:block;width:100%}.course-dialog input:not([type="checkbox"]),.course-dialog textarea,.course-dialog select{font:inherit;padding:10px 12px;border:1px solid var(--control);border-radius:9px;color:var(--ink);background:white;margin:6px 0 16px}.course-dialog textarea{resize:vertical}.course-dialog label{font-weight:600}.course-dialog input[type="checkbox"]{width:19px;height:19px;accent-color:var(--accent);flex-shrink:0}.course-form-grid{display:grid;grid-template-columns:1fr 1.5fr;gap:16px}.course-dialog fieldset{border:1px solid var(--line);border-radius:12px;margin:0 0 20px;padding:16px}.course-dialog legend{font-weight:750}.course-dialog fieldset p{margin-top:0;color:var(--muted)}.course-log-items{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;margin-top:12px;max-height:300px;overflow:auto;padding-right:6px}.course-log-items label{display:flex!important;gap:10px;align-items:flex-start;padding:8px;border-radius:8px;background:white;font-weight:500}.course-log-items label small{display:block;color:var(--muted)}.course-difficult{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.course-difficult label{display:flex!important;gap:7px;align-items:center;font-weight:400}.course-inline-check{display:flex;gap:10px;align-items:center;margin:16px 0}.course-dialog .primary{min-height:46px}.course-study-word{font-size:clamp(1.7rem,5vw,3rem);text-align:center;font-weight:650;margin:24px 0;line-height:1.4}.course-answer-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:20px 0}.course-answer-options button{min-height:56px;background:white;overflow-wrap:anywhere}.course-dialog .button-row{margin-top:18px}.course-ratings{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:18px}.course-ratings button{min-height:48px}#course-reveal{padding:20px;background:white;border:1px solid var(--line);border-radius:12px;margin:18px 0}#course-reveal>strong{font-size:2rem}#course-next{margin-top:18px;width:100%}.course-correct,.course-wrong{padding:14px;margin:18px 0;border-radius:10px}.course-correct{background:var(--blue-soft);color:var(--blue)}.course-wrong{background:var(--danger-soft);color:var(--danger)}#course-answer-form>button{margin-bottom:10px}#course-log-message{color:var(--danger)}
@media(min-width:1400px){main{max-width:1320px}}
@media(max-width:1100px){.course-overview{grid-template-columns:1fr}.course-words,.course-confusions{grid-template-columns:repeat(2,minmax(0,1fr))}.course-next{padding:22px}.course-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.course-skill-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){#course{gap:18px}.course-two{grid-template-columns:1fr}.course-lesson-picker{grid-template-columns:repeat(5,minmax(0,1fr))}.course-session{padding:24px}.course-lesson-heading{display:block}.course-lesson-heading>button{margin-top:16px}.course-dialog{padding:20px}.course-form-grid{grid-template-columns:1fr;gap:0}.course-checkpoint-history{grid-template-columns:1fr}.course-difficult{grid-template-columns:repeat(2,minmax(0,1fr))}.course-weak-list article,.course-history-row{align-items:flex-start;flex-direction:column}.course-toolbar>button{width:100%}}
@media(max-width:430px){.course-words,.course-confusions,.course-log-items{grid-template-columns:1fr}.course-metrics{gap:10px}.course-metric{padding:16px 12px}.course-metric>strong{font-size:1.7rem}.course-skill-grid{gap:18px 14px}.course-answer-options{grid-template-columns:1fr}.course-ratings{grid-template-columns:1fr}.course-session-action>button{width:100%}}