.demo{--accent:var(--math)}.demo-toolbar{display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center;margin-bottom:16px}.toolbar-item{display:inline-flex;gap:8px;align-items:center;font-size:.95rem;font-weight:600}.toolbar-item select{font:inherit;padding:6px 10px;border-radius:10px;border:1.5px solid var(--line);background:#fff;min-height:40px}.toolbar-item input{width:20px;height:20px;accent-color:var(--teal)}.progress-rail{display:flex;gap:6px;list-style:none;padding:0;margin:0 0 18px;overflow-x:auto}.progress-rail li{flex:1 0 auto;font-size:.8rem;font-weight:600;color:var(--ink-2);padding:8px 10px 6px;border-top:4px solid var(--line);white-space:nowrap}.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{display:grid;gap:20px;max-width:860px}.student{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px 18px 26px;box-shadow:var(--shadow);overflow:hidden;background-image:radial-gradient(circle at 100% 0,rgba(75,79,196,.07) 0 90px,transparent 91px),radial-gradient(circle at 100% 0,rgba(75,79,196,.05) 0 150px,transparent 151px)}@media (min-width:720px){.student{padding:30px 32px 34px}}.subject-band{display:inline-flex;font-size:.82rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;margin-bottom:14px}.subject-icon{width:28px;height:28px;display:grid;place-items:center;border-radius:8px;background:rgba(75,79,196,.1);font-size:1rem}.facts{padding-left:20px;margin:0}.facts li{margin:4px 0}.qcard{display:grid;gap:10px}.qlabel{font-size:.85rem;font-weight:700;color:var(--ink-2)}.qprompt{font-weight:600;margin:0}.expr{font-size:clamp(1.7rem,5vw,2.2rem);font-weight:760;color:var(--navy);letter-spacing:.02em;padding:14px 18px;background:#fff;border:1.5px solid var(--line);border-radius:16px;text-align:center;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.options{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.option{font:inherit;font-size:1.12rem;font-weight:700;min-height:56px;border-radius:14px;border:1.5px solid var(--line);background:var(--paper);color:var(--navy);cursor:pointer;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.option:hover:not([disabled]){border-color:var(--accent);background:#fff}.option[disabled]{opacity:.5;cursor:default}.hints{display:grid;gap:8px}.hint-line{background:var(--mint);border-radius:12px;padding:10px 14px;margin:0}.hint-line ol{margin:6px 0 0;padding-left:20px}.worked{background:var(--mint);border-radius:16px;padding:16px}.worked .expr{background:transparent;border:0;padding:0 0 6px;text-align:left}.worked ol{margin:0;padding-left:20px}.checkin{position:relative;display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;border:1.5px dashed var(--teal);border-radius:14px;padding:12px 40px 12px 14px;background:#fff}.checkin-x{position:absolute;right:8px;top:6px;border:0;background:none;font-size:1.4rem;cursor:pointer;color:var(--ink-2);width:32px;height:32px}.evidence{display:grid;grid-template-columns:1fr 1fr;gap:12px}.evidence>div{background:var(--mint);border-radius:16px;padding:14px;display:grid}.evidence .big{font-size:1.8rem;font-weight:780;color:var(--navy)}.week{display:grid;gap:10px}@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);border-radius:14px;padding:12px;background:var(--paper);display:grid;gap:8px;align-content:start}.day.rest{background:#f6f8f7}.day-head{display:flex;justify-content:space-between;align-items:baseline}.day .mins{font-weight:760;color:var(--navy);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.avail{display:flex;gap:8px;align-items:center;font-size:.85rem;color:var(--ink-2)}.avail select{font:inherit;font-size:.85rem;padding:4px 8px;border-radius:8px;min-height:36px}.avail select,.block{border:1px solid var(--line);background:#fff}.block{border-left:4px solid var(--teal);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{display:grid;grid-template-columns:auto 1fr;gap:6px 12px;font-size:.88rem;margin:14px 0}.engine dt{color:#a9c2bc}.engine dd{margin:0;overflow-wrap:anywhere}.engine code{background:rgba(255,255,255,.08);padding:1px 6px;border-radius: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{border-radius:30px;box-shadow:inset 0 0 0 1px var(--line),0 24px 50px -30px rgba(14,27,44,.3);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)}.subject-band{display:flex;align-items:center;gap:8px;color:var(--accent)}.subject-band .me{margin-left:auto;display:inline-flex;align-items:center;gap:8px;color:var(--ink);text-transform:none;letter-spacing:0;font:700 .95rem var(--body)}.subject-icon{background:var(--accent-soft);color:var(--accent)}.student h2{font-size:clamp(1.45rem,3vw,1.9rem)}.pick{display:grid;gap:8px}.pick-label{font:700 .74rem var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--ink-2)}.avatars,.themes{display:flex;flex-wrap:wrap;gap:8px}.av-btn{border:0;background:var(--paper);padding:6px;border-radius:18px;cursor:pointer;box-shadow:inset 0 0 0 2px transparent;transition:transform .15s}.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{display:inline-flex;align-items:center;gap:8px;border:0;cursor:pointer;font:700 .95rem var(--body);padding:9px 14px;border-radius:999px;background:var(--paper);color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--line)}.theme-chip i{width:16px;height:16px;border-radius:50%;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{border-radius:22px;background:var(--paper);border:0}.expr,.option{font-family:var(--display);box-shadow:inset 0 0 0 2px var(--line)}.option{border-radius:18px;border:0;background:#fff;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{justify-self:end;float:right;display:grid;justify-items:center;padding:12px 18px;border:3px dashed var(--coral);border-radius:18px;background:var(--stamp-bg);color:var(--coral-ink);transform:rotate(-6deg);margin:-6px 0 0 12px}.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{left:50%;top:42%;width:0;height:0;pointer-events:none;z-index:5}.burst,.burst i{position:absolute}.burst i{width:10px;height:14px;border-radius:3px;opacity:0}@media (prefers-reduced-motion:no-preference){.burst i{animation:pop .9s cubic-bezier(.2,.7,.3,1) forwards}.demo-stamp{animation:press .6s cubic-bezier(.2,.9,.3,1.4) both}@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%{transform:rotate(-6deg) scale(1.4);opacity:0}to{transform:rotate(-6deg) scale(1);opacity:1}}}@media (prefers-reduced-motion:reduce){.burst{display:none}}