:root {
  --bg: #f6f7fb; --card: #fff; --ink: #1f2430; --muted: #6b7280; --accent: #4f8fdc;
  --good: #2e9d5b; --warn: #d98b1f; --bad: #c8463d; --radius: 14px;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--ink); line-height: 1.5; }
header { display: flex; gap: 1rem; align-items: center; padding: .75rem 1.25rem; background: var(--card); box-shadow: 0 1px 3px #0001; }
header .brand { font-weight: 700; text-decoration: none; color: var(--ink); margin-right: auto; }
main { max-width: 900px; margin: 0 auto; padding: 1.25rem; }
.card { background: var(--card); border-radius: var(--radius); padding: 1.1rem 1.3rem; margin: 1rem 0; box-shadow: 0 1px 4px #0001; border: 0; text-align: left; font: inherit; color: inherit; }
.narrow { max-width: 360px; margin: 10vh auto; }
.muted { color: var(--muted); }
.error, .wrong { color: var(--bad); }
.correct { color: var(--good); font-weight: 600; }
.nudge { color: var(--warn); }
button { font: inherit; padding: .55rem 1rem; border-radius: 10px; border: 1px solid #cdd3e0; background: #fff; cursor: pointer; }
button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
button.link { border: 0; background: none; color: var(--accent); padding: .2rem 0; }
button:disabled { opacity: .5; cursor: default; }
input, select { font: inherit; padding: .5rem .7rem; border-radius: 10px; border: 1px solid #cdd3e0; }
label { display: block; margin: .6rem 0; }
label input { width: 100%; margin-top: .25rem; }
.actions { display: flex; gap: .75rem; flex-wrap: wrap; margin: 1rem 0; }
.tag { display: inline-block; background: #e8f0fb; color: var(--accent); border-radius: 999px; padding: .1rem .7rem; font-size: .85rem; font-weight: 600; }
.tag.challenge { background: #f3ebff; color: #7b5ea7; }
.status { font-size: .85rem; font-weight: 600; border-radius: 999px; padding: .1rem .6rem; }
.status.solid { background: #e3f5ea; color: var(--good); }
.status.shaky { background: #fdf1de; color: var(--warn); }
.status.not_started { background: #eef0f4; color: var(--muted); }

/* kid */
body.kid { font-size: 1.15rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1rem; }
.card.skill { cursor: pointer; }
.card.skill.recommended { outline: 3px solid var(--accent); }
.big-idea { font-size: 1.3rem; font-weight: 600; }
.real-world { border-left: 6px solid #f4a261; }
.alt, .reteach { border-left: 6px solid #7b5ea7; }
.hint { border-left: 6px solid var(--accent); }
.hint.solution { border-left-color: var(--good); }
.question .prompt { font-size: 1.45rem; font-weight: 600; }
.answer form { display: flex; gap: .6rem; }
.answer input { font-size: 1.3rem; width: 10rem; }
.choice { display: block; width: 100%; text-align: left; margin: .4rem 0; font-size: 1.2rem; }
.steps li { margin: .3rem 0; }
.visual-wrap { margin: .75rem 0; }
.visual { max-width: 420px; width: 100%; height: auto; }
figcaption { color: var(--muted); font-size: .95rem; }
.break { font-weight: 600; }

/* parent */
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th, td { text-align: left; padding: .45rem .4rem; border-bottom: 1px solid #eceef3; vertical-align: top; }
.plan li { margin-bottom: .6rem; }
.plan p { margin: .2rem 0 0; }
.gap { padding: .6rem 0; border-bottom: 1px solid #eceef3; }
.gap p { margin: .2rem 0; }
.trend { display: flex; align-items: flex-end; gap: .5rem; height: 140px; }
.bar-wrap { flex: 1; height: 100%; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; font-size: .75rem; color: var(--muted); }
.bar { width: 100%; background: var(--accent); border-radius: 6px 6px 0 0; }
dialog { max-width: 900px; width: 95vw; border: 0; border-radius: var(--radius); }
.summary { font-size: 1.05rem; }

.strand { margin: 1.6rem 0 .2rem; font-size: 1.2rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.card.skill h3 { margin: .2rem 0; }
.card.skill p { font-size: .98rem; }
.hero { width: 100%; }
.vocab dt { font-weight: 700; margin-top: .4rem; }
.vocab dd { margin: 0 0 .3rem 0; }

.tests-card { width: 100%; border: 2px dashed #cdd3e0; }
.difficulty { display: inline-block; font-size: .85rem; font-weight: 600; border-radius: 999px; padding: .1rem .6rem; margin-bottom: .4rem; }
.difficulty.d1 { background: #e3f5ea; color: var(--good); }
.difficulty.d2 { background: #e8f0fb; color: var(--accent); }
.difficulty.d3 { background: #f3ebff; color: #7b5ea7; }
.choice.selected { outline: 3px solid var(--accent); background: #e8f0fb; }
label.choice.check { display: flex; gap: .5rem; align-items: center; border: 1px solid #cdd3e0; border-radius: 10px; padding: .55rem 1rem; margin: .4rem 0; cursor: pointer; }
label.choice.check input { width: 1.2rem; height: 1.2rem; }
.check-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: .2rem .8rem; margin: .6rem 0; }
.check-row { margin: .1rem 0; font-size: .98rem; }
.test-bar { display: flex; gap: 1rem; align-items: center; position: sticky; top: 0; background: var(--bg); padding: .6rem 0; z-index: 1; }
.test-bar b { margin-right: auto; }
.clock { font-size: 1.4rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.clock.low { color: var(--bad); }
.test-nav { display: flex; flex-wrap: wrap; gap: .35rem; margin: .4rem 0 1rem; }
.nav-dot { width: 2.4rem; padding: .35rem 0; }
.nav-dot.answered { background: #e3f5ea; border-color: var(--good); }
.nav-dot.current { outline: 3px solid var(--accent); }
.q-head { display: flex; justify-content: space-between; margin-bottom: .4rem; }
.marks { font-weight: 700; color: #7b5ea7; }
.big-score { font-size: 2.6rem; font-weight: 800; }
.review.right { border-left: 6px solid var(--good); }
.review.wrong { border-left: 6px solid var(--bad); }
.prompt.small { font-size: 1.1rem; }
.muted.small { font-size: .85rem; margin: .3rem 0 0; }

.tabs { display: flex; gap: .5rem; margin: .5rem 0 1rem; flex-wrap: wrap; }
.tab { font-size: 1.05rem; padding: .5rem 1.1rem; border-radius: 999px; }
.tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.passage summary { cursor: pointer; font-size: 1.05rem; }
.passage-body { max-height: 55vh; overflow-y: auto; margin-top: .6rem; padding-right: .5rem; }
.para { position: relative; padding-left: 2rem; margin: .7rem 0; line-height: 1.7; font-size: 1.08rem; }
.pnum { position: absolute; left: 0; top: .1rem; font-size: .8rem; font-weight: 700; color: var(--muted);
        background: #eef0f4; border-radius: 999px; min-width: 1.4rem; text-align: center; }
.para.poem { white-space: normal; }

.kid-dialog { max-width: 640px; width: 94vw; border: 0; border-radius: var(--radius); font-size: 1.05rem; }
.kid-dialog textarea, .kid-dialog input, .kid-dialog select { width: 100%; margin-top: .25rem; font: inherit; }
textarea { border-radius: 10px; border: 1px solid #cdd3e0; padding: .5rem .7rem; }
.stars .star { font-size: 1.8rem; border: 0; background: none; color: #f4a261; padding: 0 .15rem; }
.book.done { border-left: 6px solid var(--good); }
.book-idea { padding: .6rem 0; border-bottom: 1px solid #eceef3; }
.flashcard { text-align: center; padding: 1rem 0; }
.flashcard .word { font-size: 2.2rem; font-weight: 800; margin: .5rem 0; }
.week .big-score { color: var(--accent); }

.card.today { width: 100%; background: linear-gradient(135deg, #4f8fdc, #7b5ea7); color: #fff; }
.card.today h2 { margin: .2rem 0; }
.today-steps { margin: .4rem 0 0; padding-left: 1.2rem; font-size: .95rem; }
.card.today.done { background: #e3f5ea; color: var(--ink); }
.today-bar { margin: .4rem 0 .8rem; }
.today-progress { height: 8px; background: #e5e9f0; border-radius: 999px; margin-top: .3rem; overflow: hidden; }
.today-progress div { height: 100%; background: var(--good); }

.extras { margin: .5rem 0; }
.badge-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: .6rem; margin: .5rem 0 1rem; }
.badge { border: 1px solid #e5e9f0; border-radius: 12px; padding: .6rem; text-align: center; opacity: .85; font-size: .92rem; }
.badge.earned { background: #fff8e8; border-color: #f4a261; opacity: 1; }
.badge-icon { font-size: 2rem; }
.beat { color: #b5651d; font-weight: 700; }
.explain { border-left: 6px solid #4f8fdc; }
.explain textarea { width: 100%; font: inherit; }
.coach { background: #f3f7fd; border-radius: 10px; padding: .6rem .8rem; }
.interactive { max-width: 520px; touch-action: manipulation; }
.steppers { display: flex; gap: 1rem; flex-wrap: wrap; margin: .5rem 0; }
.stepper { display: flex; align-items: center; gap: .3rem; }
.stepper button { padding: .3rem .8rem; font-size: 1.2rem; }

textarea.essay { width: 100%; font: inherit; font-size: 1.08rem; line-height: 1.6; }
.coach-box { border-left: 6px solid var(--good); }
.coach-box.next { border-left-color: var(--accent); }
.stars { color: #f4a261; font-size: 1.2rem; white-space: nowrap; }
.essay-view { white-space: pre-wrap; background: #fafbfd; padding: .6rem; border-radius: 8px; }
.wchart td { text-align: center; vertical-align: bottom; }
.wbar { width: 18px; margin: 0 auto; background: var(--accent); border-radius: 4px 4px 0 0; }

.understand { border-left: 6px solid #7b5ea7; }
.ask-row { display: flex; gap: .5rem; }
.ask-row input { flex: 1; }
.chat .me { text-align: right; color: var(--muted); margin: .4rem 0 .2rem; }
.care { background: #fff4e5; border: 2px solid #f4a261; border-radius: 10px; padding: .7rem .9rem; font-weight: 600; }
.alert-crisis { background: #fdecea; border: 2px solid var(--bad); }
.flag { font-weight: 700; color: var(--bad); }

.contest p { margin: .35rem 0; }
.contest h3 { margin-bottom: .2rem; }
.spell-input { font-size: 1.6rem; letter-spacing: .08em; width: 100%; max-width: 22rem; }
.spell-asks button { font-size: .95rem; }
.spell-extra { min-height: 2rem; }
.spell-word, .spell-typed { font-size: 1.5rem; letter-spacing: .1em; font-family: ui-monospace, Menlo, monospace; }
.spell-word mark { background: #c8f2d0; } .spell-typed mark { background: #ffd3d3; }
.spell-right { border-color: #4caf50; } .spell-wrong { border-color: #e57373; }
.hi { display: flex; align-items: center; gap: .4rem; }
button.avatar { font-size: 1.8rem; line-height: 1; padding: .2rem .4rem; border-radius: 999px; background: none; }
.avatar-grid { display: flex; flex-wrap: wrap; gap: .4rem; }
.avatar-grid .picked { outline: 3px solid var(--accent); }
.profile-row { display: grid; grid-template-columns: 8rem 1fr; gap: .2rem .6rem; align-items: center; margin: .4rem 0; }
.profile-row .muted { grid-column: 2; }
.fig-choices { display: flex; flex-wrap: wrap; gap: .5rem; }
.fig-choices .choice { display: flex; flex-direction: column; align-items: center; width: auto; padding: .3rem .5rem; }
.fig-choices .visual-wrap { margin: 0; }
svg.fig-option { width: 84px; height: 84px; }
.choice.static { cursor: default; }
.fig-choices .choice.right { border-color: #4caf50; background: #effaf0; }
.fig-choices .choice.wrong { border-color: #e57373; background: #fdf0f0; }
.maze-text { font-size: 1.15rem; line-height: 2.1; max-width: 46rem; }
.maze-box { font-size: 1rem; padding: .1rem .2rem; margin: 0 .15rem; }
.maze-right { color: #2e7d32; } .maze-wrong s { color: #c62828; } .maze-wrong b { color: #2e7d32; } .maze-unread { color: #999; }
/* Craft lessons */
.big-idea { background: #f3f7ff; border-color: #c6d8f5; }
ol.steps li, ul.checklist li { margin: .3rem 0; }
.model { background: #fffdf5; border-color: #e8dca8; }
.model-part { border-left: 4px solid #e0c766; padding: .2rem .7rem; margin: .6rem 0; }
.model-label { font-size: .85rem; font-weight: 700; color: #8a6d1f; text-transform: uppercase; letter-spacing: .03em; }
.model-text { font-size: 1.05rem; line-height: 1.7; }
table.ba td { vertical-align: top; width: 50%; padding: .5rem; }
table.ba td.weak { background: #fdf3f3; } table.ba td.strong { background: #f1faf2; }
.tag.weak-tag { background: #e57373; } .tag.strong-tag { background: #4caf50; }
.craft-q.right { border-color: #4caf50; } .craft-q.wrong { border-color: #e57373; }
.lead-in { background: #fafafa; border-left: 3px solid #cdd3e0; padding: .3rem .7rem; margin: .4rem 0; }
.try-it { background: #f7f3ff; border-color: #d6c9f0; }
.planner label { display: block; margin: .4rem 0; }
.line-note { border-left: 4px solid #e8a33d; padding: .2rem .7rem; margin: .7rem 0; }
.line-note p { margin: .2rem 0; }
.quoted { font-style: italic; font-size: 1.05rem; }
.coach-lesson { border: 1px solid #e3e7ef; border-radius: 8px; padding: .4rem .7rem; margin: .4rem 0; }
.coach-lesson summary { font-weight: 600; cursor: pointer; }