.demo{--accent:var(--math)}.demo-toolbar{flex-wrap:wrap;align-items:center;gap:10px 16px;margin-bottom:16px;display:flex}.toolbar-item{align-items:center;gap:8px;font-size:.95rem;font-weight:600;display:inline-flex}.toolbar-item select{font:inherit;border:1.5px solid var(--line);background:#fff;border-radius:10px;min-height:40px;padding:6px 10px}.toolbar-item input{width:20px;height:20px;accent-color:var(--teal)}.progress-rail{gap:6px;margin:0 0 18px;padding:0;list-style:none;display:flex;overflow-x:auto}.progress-rail li{color:var(--ink-2);border-top:4px solid var(--line);white-space:nowrap;flex:1 0 auto;padding:8px 10px 6px;font-size:.8rem;font-weight:600}.progress-rail li.done{border-color:var(--teal);color:var(--navy)}.progress-rail li.now{border-color:var(--accent);color:var(--navy)}.progress-rail li.done span:before{content:"✓ "}.demo-grid{gap:20px;display:grid}@media (min-width:1000px){.demo-grid{grid-template-columns:minmax(0,1fr) 320px;align-items:start}}.student{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);background-image:radial-gradient(circle at 100% 0,#4b4fc412 0 90px,#0000 91px),radial-gradient(circle at 100% 0,#4b4fc40d 0 150px,#0000 151px);padding:22px 18px 26px;position:relative;overflow:hidden}@media (min-width:720px){.student{padding:30px 32px 34px}}.subject-band{letter-spacing:.06em;text-transform:uppercase;color:var(--accent);align-items:center;gap:8px;margin-bottom:14px;font-size:.82rem;font-weight:700;display:inline-flex}.subject-icon{background:#4b4fc41a;border-radius:8px;place-items:center;width:28px;height:28px;font-size:1rem;display:grid}.facts{margin:0;padding-left:20px}.facts li{margin:4px 0}.qcard{gap:10px;display:grid}.qlabel{color:var(--ink-2);font-size:.85rem;font-weight:700}.qprompt{margin:0;font-weight:600}.expr{color:var(--navy);letter-spacing:.02em;border:1.5px solid var(--line);text-align:center;font-variant-numeric:tabular-nums;background:#fff;border-radius:16px;padding:14px 18px;font-size:clamp(1.9rem,6vw,2.6rem);font-weight:760}.options{grid-template-columns:repeat(2,1fr);gap:10px;display:grid}.option{font:inherit;border:1.5px solid var(--line);background:var(--paper);min-height:56px;color:var(--navy);cursor:pointer;font-variant-numeric:tabular-nums;border-radius:14px;font-size:1.25rem;font-weight:700}.option:hover:not([disabled]){border-color:var(--accent);background:#fff}.option[disabled]{opacity:.5;cursor:default}.hints{gap:8px;display:grid}.hint-line{background:var(--mint);border-radius:12px;margin:0;padding:10px 14px}.hint-line ol{margin:6px 0 0;padding-left:20px}.worked{background:var(--mint);border-radius:16px;padding:16px}.worked .expr{text-align:left;background:0 0;border:0;padding:0 0 6px}.worked ol{margin:0;padding-left:20px}.checkin{border:1.5px dashed var(--teal);background:#fff;border-radius:14px;flex-wrap:wrap;align-items:center;gap:10px 14px;padding:12px 40px 12px 14px;display:flex;position:relative}.checkin-x{cursor:pointer;color:var(--ink-2);background:0 0;border:0;width:32px;height:32px;font-size:1.4rem;position:absolute;top:6px;right:8px}.evidence{grid-template-columns:1fr 1fr;gap:12px;display:grid}.evidence>div{background:var(--mint);border-radius:16px;padding:14px;display:grid}.evidence .big{color:var(--navy);font-size:1.8rem;font-weight:780}.week{gap:10px;display:grid}@media (min-width:720px){.week{grid-template-columns:repeat(2,1fr)}}@media (min-width:1200px){.week{grid-template-columns:repeat(3,1fr)}}.day{border:1px solid var(--line);background:var(--paper);border-radius:14px;align-content:start;gap:8px;padding:12px;display:grid}.day.rest{background:#f6f8f7}.day-head{justify-content:space-between;align-items:baseline;display:flex}.day .mins{color:var(--navy);font-variant-numeric:tabular-nums;font-weight:760}.avail{color:var(--ink-2);align-items:center;gap:8px;font-size:.85rem;display:flex}.avail select{font:inherit;border:1px solid var(--line);background:#fff;border-radius:8px;min-height:36px;padding:4px 8px;font-size:.85rem}.block{border:1px solid var(--line);border-left:4px solid var(--teal);background:#fff;border-radius:10px;padding:8px 10px;font-size:.95rem}.block.k-teacher_deadline{border-left-color:var(--social)}.block.k-due_review{border-left-color:var(--math)}.block.k-new_skill{border-left-color:var(--science)}.engine details{background:var(--navy);color:#dfe9e6;border-radius:var(--radius-lg);padding:18px}.engine summary{cursor:pointer;color:#fff}.engine .hint{color:#a9c2bc}.engine dl{grid-template-columns:auto 1fr;gap:6px 12px;margin:14px 0;font-size:.88rem;display:grid}.engine dt{color:#a9c2bc}.engine dd{overflow-wrap:anywhere;margin:0}.engine code{background:#ffffff14;border-radius:6px;padding:1px 6px;font-size:.85em}.parent-view .card{padding:18px}.demo.age-7-10{font-size:1.12rem}.demo.age-7-10 .option{min-height:68px;font-size:1.5rem}.demo.age-7-10 .hint{font-size:.98rem}.demo.age-14-17 .student,.demo.age-18plus .student,.demo.simple .student{background-image:none}.demo.simple .subject-icon{display:none}.student{scroll-margin-top:80px}.demo{--accent:var(--lagoon-ink);--accent-soft:#e3f7f4}.demo.theme-lila{--accent:var(--violet-ink);--accent-soft:#eeebff}.demo.theme-mercan{--accent:#c2401f;--accent-soft:#fff0ea}.student{box-shadow:inset 0 0 0 1px var(--line), 0 24px 50px -30px #0e1b2c4d;background-color:#fff;background-image:radial-gradient(circle at 100% 0, var(--accent-soft) 0 120px, transparent 121px), radial-gradient(circle at 0 100%, #f6ffd9 0 90px, transparent 91px);border-radius:30px}.subject-band{color:var(--accent);align-items:center;gap:8px;display:flex}.subject-band .me{color:var(--ink);text-transform:none;letter-spacing:0;font:700 .95rem var(--body);align-items:center;gap:8px;margin-left:auto;display:inline-flex}.subject-icon{background:var(--accent-soft);color:var(--accent)}.student h2{font-size:clamp(1.7rem,4vw,2.4rem)}.pick{gap:8px;display:grid}.pick-label{font:700 .74rem var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--ink-2)}.avatars,.themes{flex-wrap:wrap;gap:8px;display:flex}.av-btn{background:var(--paper);cursor:pointer;border:0;border-radius:18px;padding:6px;transition:transform .15s;box-shadow:inset 0 0 0 2px #0000}.av-btn[aria-pressed=true]{box-shadow:inset 0 0 0 3px var(--accent);background:var(--accent-soft)}.av-btn:hover{transform:translateY(-2px)rotate(-3deg)}.theme-chip{cursor:pointer;font:700 .95rem var(--body);background:var(--paper);color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--line);border:0;border-radius:999px;align-items:center;gap:8px;padding:9px 14px;display:inline-flex}.theme-chip i{border-radius:50%;width:16px;height:16px;display:inline-block}.t-lagun i{background:#0fa697}.t-lila i{background:#8b7fff}.t-mercan i{background:#ff6b4a}.theme-chip[aria-pressed=true]{box-shadow:inset 0 0 0 2.5px var(--ink)}.expr{font-family:var(--display);background:var(--paper);box-shadow:inset 0 0 0 2px var(--line);border:0;border-radius:22px}.option{font-family:var(--display);box-shadow:inset 0 0 0 2px var(--line);background:#fff;border:0;border-radius:18px;transition:transform .12s,box-shadow .12s,background .12s}.option:hover:not([disabled]){box-shadow:inset 0 0 0 3px var(--accent);background:var(--accent-soft);transform:translateY(-2px)}.option:active:not([disabled]){transform:scale(.97)}.progress-rail li.done{border-color:var(--accent)}.progress-rail li.now{border-color:var(--lime)}.hint-line,.worked{background:var(--accent-soft)}.btn-primary{background:var(--accent)}.evidence>div{background:var(--accent-soft)}.demo-stamp{float:right;border:3px dashed var(--coral);background:var(--stamp-bg);color:var(--coral-ink);border-radius:18px;justify-self:end;justify-items:center;margin:-6px 0 0 12px;padding:12px 18px;display:grid;transform:rotate(-6deg)}.demo-stamp span{font:700 .7rem var(--mono);letter-spacing:.16em}.demo-stamp b{font:780 2rem/1 var(--display);color:var(--ink)}.demo-stamp small{font:600 .75rem var(--body)}.student{position:relative}.burst{pointer-events:none;z-index:5;width:0;height:0;position:absolute;top:42%;left:50%}.burst i{opacity:0;border-radius:3px;width:10px;height:14px;position:absolute}@media (prefers-reduced-motion:no-preference){.burst i{animation:.9s cubic-bezier(.2,.7,.3,1) forwards pop}.demo-stamp{animation:.6s cubic-bezier(.2,.9,.3,1.4) both press}@keyframes pop{0%{opacity:1;transform:rotate(var(--a)) translateY(0) scale(.6)}80%{opacity:1}to{opacity:0;transform:rotate(var(--a)) translateY(calc(-1 * var(--d))) rotate(180deg) scale(1)}}@keyframes press{0%{opacity:0;transform:rotate(-6deg)scale(1.4)}to{opacity:1;transform:rotate(-6deg)scale(1)}}}@media (prefers-reduced-motion:reduce){.burst{display:none}}