:root{--page: #fffceb;--white: #ffffff;--ink: #344054;--muted: #667085;--pink: #ec4899;--purple: #8b5cf6;--blue: #3b82f6;--sky: #38bdf8;--green: #10b981;--amber: #f59e0b;--red: #f43f5e;--brand: #173a78;--line: #ede9fe;--shadow: 0 7px 18px rgba(76, 29, 149, .1);--radius: 18px;--app-width: 82rem}*{box-sizing:border-box}html{background:var(--page);scroll-behavior:smooth}body{margin:0;min-height:100vh;background:var(--page);color:var(--ink);font-family:Nunito,Segoe UI,Arial,sans-serif;-webkit-font-smoothing:antialiased}button,input{font:inherit}button{cursor:pointer}h1,h2,h3{margin:0 0 .4rem;line-height:1.25}p{margin:0 0 .6rem;line-height:1.6}.app-shell{width:min(100%,var(--app-width));margin:0 auto;padding:0 .75rem 1.5rem}.eps-header{position:sticky;top:0;z-index:20;background:var(--page);padding:.6rem 0 .2rem;border-bottom:1px solid var(--line)}.eps-header-row{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem}.eps-brand{display:flex;align-items:center;gap:.55rem}.eps-brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,var(--purple),var(--pink));color:#fff;font-size:1.3rem;font-weight:800}.eps-brand-text{display:flex;flex-direction:column;line-height:1.1}.eps-brand-text b{color:var(--brand);font-size:1.05rem}.eps-brand-text small{color:var(--muted);font-size:.78rem}.eps-class-switch{display:flex;flex-wrap:wrap;gap:.3rem;margin-left:auto}.class-chip{border:1px solid var(--line);background:var(--white);color:var(--ink);border-radius:999px;padding:.35rem .85rem;font-weight:700;font-size:.9rem;transition:.15s ease}.class-chip:hover{border-color:var(--purple);color:var(--purple)}.class-chip.is-active{background:linear-gradient(135deg,var(--purple),var(--pink));border-color:transparent;color:#fff;box-shadow:0 5px 14px #8b5cf647}.eps-score{display:flex;gap:.5rem;align-items:center;font-size:.88rem;font-weight:700}.eps-score span{display:inline-flex;align-items:center;gap:.28rem;padding:.28rem .6rem;border-radius:999px;background:var(--white);border:1px solid var(--line)}.score-good{color:var(--green)}.score-bad{color:var(--red)}.eps-account{display:flex;align-items:center;gap:.4rem;margin-left:auto}.account-name{max-width:140px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:800;font-size:.9rem;color:var(--brand)}.login-btn{display:inline-flex;align-items:center;gap:.3rem;border:2px solid var(--purple);background:var(--white);color:var(--purple);border-radius:999px;padding:.35rem .9rem;font-weight:800;font-size:.9rem}.login-btn:hover{background:var(--purple);color:#fff}.login-btn:disabled{opacity:.5;cursor:not-allowed}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:999px;border:1px solid var(--line);background:var(--white);color:var(--brand)}.icon-btn:hover{border-color:var(--purple);color:var(--purple)}.eps-tabs{display:flex;gap:.35rem;margin-top:.6rem;overflow-x:auto;padding-bottom:.2rem}.eps-tab{display:inline-flex;align-items:center;gap:.35rem;border:1px solid var(--line);background:var(--white);color:var(--ink);border-radius:14px;padding:.45rem .9rem;font-weight:700;white-space:nowrap;transition:.15s ease}.eps-tab:hover{transform:translateY(-1px)}.eps-tab.is-active{background:linear-gradient(135deg,var(--sky),var(--blue));border-color:transparent;color:#fff;box-shadow:0 6px 16px #0ea5e940}.eps-main{padding-top:1rem}.eps-footer{margin-top:2rem;padding:1.2rem 0 .4rem;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:.2rem;text-align:center;color:var(--muted);font-size:.86rem}.eyebrow{display:inline-block;font-size:.74rem;font-weight:800;letter-spacing:.09em;color:var(--purple);text-transform:uppercase}.muted{color:var(--muted)}.section-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:1rem;margin-bottom:1rem}.section-heading h1{font-size:1.6rem;color:var(--brand)}.heading-icon{color:var(--purple);flex:none}.unit-list{display:flex;flex-direction:column;gap:.7rem}.unit-block{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.unit-header{width:100%;display:flex;align-items:center;gap:.7rem;padding:.9rem 1rem;background:transparent;border:0;text-align:left}.unit-title{flex:1;font-weight:800;color:var(--brand)}.unit-count{font-size:.82rem;color:var(--muted);font-weight:700}.unit-chevron{color:var(--purple);transition:transform .18s ease}.unit-block.open .unit-chevron{transform:rotate(90deg)}.lesson-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:.6rem;padding:0 1rem 1rem}.lesson-card{display:flex;align-items:center;gap:.7rem;text-align:left;padding:.7rem .8rem;border-radius:14px;border:1px solid var(--line);background:#fbfaff;transition:.15s ease}.lesson-card:hover:not(:disabled){border-color:var(--purple);transform:translateY(-1px);box-shadow:var(--shadow)}.lesson-card.is-locked{opacity:.55;cursor:not-allowed}.lesson-no{display:grid;place-items:center;width:34px;height:34px;flex:none;border-radius:12px;background:linear-gradient(135deg,#ede9fe,#fce7f3);color:var(--purple);font-weight:800}.lesson-body{flex:1;min-width:0;display:flex;flex-direction:column}.lesson-body b{color:var(--brand);font-size:.95rem}.lesson-body small{color:var(--muted);font-size:.76rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lesson-side{flex:none}.lesson-go{display:inline-flex;align-items:center;gap:.2rem;font-size:.82rem;font-weight:800;color:var(--purple)}.best-badge{font-size:.8rem;font-weight:800;color:var(--green);background:#ecfdf5;border-radius:999px;padding:.2rem .55rem}.lock-badge{display:inline-flex;align-items:center;gap:.2rem;font-size:.78rem;font-weight:700;color:var(--muted)}.lesson-detail{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.2rem 1.4rem 1.6rem}.lesson-detail h1{color:var(--brand);font-size:1.5rem}.lesson-crumb{color:var(--purple);font-weight:700;font-size:.85rem;margin:.2rem 0 .4rem}.lesson-intro{color:var(--muted);font-style:italic}.detail-block{margin-top:1.2rem}.detail-block h2{display:flex;align-items:center;gap:.4rem;font-size:1.05rem;color:var(--brand);margin-bottom:.6rem}.goal-block{background:#f5f3ff;border-left:4px solid var(--purple);border-radius:12px;padding:.8rem 1rem}.mistake-block{background:#fff1f2;border-left:4px solid var(--red);border-radius:12px;padding:.8rem 1rem}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:.7rem}.knowledge-card{background:#fbfaff;border:1px solid var(--line);border-radius:14px;padding:.8rem .9rem}.knowledge-card h3{font-size:.98rem;color:var(--purple)}.knowledge-card p{font-size:.88rem;color:var(--ink);margin-bottom:.3rem}.card-example{display:flex;gap:.3rem;align-items:flex-start;font-size:.83rem;color:#b45309!important;background:#fffbeb;border-radius:10px;padding:.4rem .5rem}.key-points{margin:0;padding-left:1.1rem;display:flex;flex-direction:column;gap:.35rem;font-size:.92rem}.detail-actions{display:flex;align-items:center;gap:.8rem;margin-top:1.4rem;flex-wrap:wrap}.best-inline{font-weight:700;color:var(--green)}.theme-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:.7rem}.theme-card{text-align:left;background:var(--white);border:1px solid var(--line);border-radius:14px;padding:.9rem 1rem;display:flex;flex-direction:column;gap:.25rem;box-shadow:var(--shadow);transition:.15s ease}.theme-card:hover:not(:disabled){border-color:var(--amber);transform:translateY(-1px)}.theme-card b{color:var(--brand)}.theme-card small{color:var(--muted);display:inline-flex;align-items:center;gap:.25rem}.exam-card{border-color:#fde68a}.crumb-row{display:flex;align-items:center;gap:.7rem;margin-bottom:.6rem;flex-wrap:wrap}.crumb-title{font-weight:800;color:var(--brand)}.quiz-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.1rem 1.3rem 1.5rem}.quiz-top{display:flex;align-items:center;justify-content:space-between;gap:.6rem;flex-wrap:wrap}.quiz-progress-text{font-weight:800;color:var(--brand)}.quiz-meta{display:flex;gap:.4rem}.timer-pill{display:inline-flex;align-items:center;gap:.25rem;font-size:.82rem;font-weight:700;color:var(--muted);background:#f8f7ff;border-radius:999px;padding:.22rem .6rem}.timer-warn{color:#fff;background:var(--red)}.progress-track{height:9px;border-radius:999px;background:var(--line);overflow:hidden;margin:.6rem 0 1rem}.progress-track>div{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--sky),var(--blue));transition:width .25s ease}.quiz-prompt{font-size:1.15rem;color:var(--brand);margin-bottom:.8rem;white-space:pre-line}.choice-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:.6rem;margin:.8rem 0}.choice-btn{padding:.75rem .9rem;border-radius:14px;border:2px solid var(--line);background:#fbfaff;font-weight:700;color:var(--ink);transition:.12s ease}.choice-btn:hover:not(:disabled){border-color:var(--purple);background:#f5f3ff}.choice-btn.picked-correct{border-color:var(--green);background:#ecfdf5;color:#047857}.choice-btn.picked-wrong{border-color:var(--red);background:#fff1f2;color:#be123c}.choice-btn.reveal-right{border-color:#6ee7b7;background:#f0fdf4}.choice-btn:disabled{cursor:default}.fill-form{display:flex;gap:.6rem;margin:.8rem 0;flex-wrap:wrap}.fill-form input{flex:1;min-width:200px;padding:.75rem .9rem;border-radius:14px;border:2px solid var(--line);font-weight:700;color:var(--ink)}.fill-form input:focus{outline:none;border-color:var(--purple)}.solution{margin-top:1rem;border-top:1px dashed var(--line);padding-top:.9rem}.feedback{display:flex;align-items:center;gap:.4rem;font-weight:800;border-radius:12px;padding:.6rem .8rem;margin-bottom:.8rem}.feedback.correct{background:#ecfdf5;color:#047857}.feedback.wrong{background:#fff1f2;color:#be123c}.solution-title{display:flex;align-items:center;gap:.35rem;font-weight:800;color:var(--brand);margin-bottom:.4rem}.solution-list{margin:0 0 .9rem;padding-left:1.2rem;display:flex;flex-direction:column;gap:.35rem;font-size:.92rem}.solution-math{display:inline-block;margin-left:.4rem;background:#f5f3ff;border-radius:8px;padding:.1rem .45rem;font-size:.85rem;color:var(--purple);font-weight:700}.primary-btn{display:inline-flex;align-items:center;justify-content:center;gap:.35rem;border:0;border-radius:999px;padding:.65rem 1.3rem;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--purple),var(--pink));box-shadow:0 6px 16px #8b5cf647;transition:.15s ease}.primary-btn:hover{transform:translateY(-1px)}.primary-btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}.primary-btn.full{width:100%}.secondary-btn{display:inline-flex;align-items:center;gap:.3rem;border:2px solid var(--line);background:var(--white);border-radius:999px;padding:.6rem 1.15rem;font-weight:800;color:var(--brand)}.secondary-btn:hover{border-color:var(--purple);color:var(--purple)}.link-btn{display:inline-flex;align-items:center;gap:.3rem;border:0;background:transparent;color:var(--purple);font-weight:700;padding:.2rem 0}.link-btn:hover{color:var(--pink)}.result-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.4rem;text-align:center}.result-icon{display:grid;place-items:center;width:64px;height:64px;margin:0 auto .6rem;border-radius:50%;background:linear-gradient(135deg,#fef3c7,#fde68a);color:#b45309}.result-card h1{color:var(--brand)}.big-score{font-size:3rem;font-weight:900;color:var(--purple);line-height:1.1}.big-score small{font-size:1.2rem;color:var(--muted)}.result-time{display:inline-flex;align-items:center;gap:.3rem;color:var(--muted);font-size:.9rem}.result-actions{display:flex;justify-content:center;gap:.6rem;flex-wrap:wrap;margin:1rem 0 1.4rem}.review-list{text-align:left;border-top:1px solid var(--line);padding-top:1rem}.review-list h2{font-size:1.05rem;color:var(--brand)}.review-item{border:1px solid var(--line);border-left-width:4px;border-radius:12px;padding:.7rem .9rem;margin-bottom:.6rem;background:#fbfaff}.review-item.ok{border-left-color:var(--green)}.review-item.no{border-left-color:var(--red)}.review-head{display:flex;justify-content:space-between;gap:.6rem;font-size:.88rem}.review-item.ok .review-head span{color:#047857;font-weight:800}.review-item.no .review-head span{color:#be123c;font-weight:800}.review-prompt{margin:.35rem 0 .2rem;font-size:.95rem;font-weight:600}.visual-figure{display:flex;justify-content:center;margin:.6rem 0 .9rem;overflow-x:auto}.visual-groups{display:flex;gap:1.2rem;flex-wrap:wrap;justify-content:center}.visual-group{display:flex;flex-direction:column;align-items:center}.visual-group-label{font-weight:800;color:var(--brand);margin-top:.3rem}.emoji-row{display:flex;flex-wrap:wrap;justify-content:center;gap:.35rem .6rem;padding:.9rem 1.2rem;background:#fffdf3;border:2px dashed #fcd34d;border-radius:16px;max-width:420px;font-size:2rem;line-height:1.2}.emoji-row.empty{color:var(--muted);font-size:1rem;font-weight:700;font-style:italic}@media(max-width:640px){.eps-class-switch{order:3;width:100%;margin-left:0}.section-heading h1{font-size:1.3rem}}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#1e143c73;display:flex;align-items:center;justify-content:center;padding:1rem;z-index:60}.modal-card{position:relative;width:min(100%,420px);background:var(--white);border-radius:var(--radius);border:2px solid var(--line);box-shadow:0 20px 50px #1e143c40;padding:1.4rem}.modal-close{position:absolute;top:.7rem;right:.7rem;border:0;background:transparent;color:var(--muted)}.auth-tabs{display:flex;gap:.35rem;margin-bottom:1rem;background:#f7f4ff;padding:.3rem;border-radius:999px}.auth-tab{flex:1;display:inline-flex;align-items:center;justify-content:center;gap:.35rem;border:0;background:transparent;border-radius:999px;padding:.5rem .6rem;font-weight:800;color:var(--muted)}.auth-tab.is-active{background:var(--white);color:var(--purple);box-shadow:0 3px 10px #8b5cf62e}.auth-form{display:flex;flex-direction:column;gap:.7rem}.auth-form label{display:flex;flex-direction:column;gap:.25rem;font-weight:800;font-size:.88rem;color:var(--brand)}.auth-form input{border:2px solid var(--line);border-radius:12px;padding:.55rem .7rem;font-weight:600;color:var(--ink)}.auth-form input:focus{outline:none;border-color:var(--purple)}.auth-error{margin:0;color:var(--red);font-weight:700;font-size:.85rem}.auth-notice{margin:0;color:var(--green);font-weight:700;font-size:.85rem}.auth-hint{margin:.9rem 0 0;font-size:.8rem;color:var(--muted);text-align:center}.admin-create{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:.8rem}.admin-create input{flex:1 1 160px;border:2px solid var(--line);border-radius:12px;padding:.5rem .7rem;font-weight:600}.admin-create input:focus{outline:none;border-color:var(--purple)}.admin-toolbar{display:flex;align-items:center;gap:.7rem;margin-bottom:.6rem}.admin-table-wrap{overflow-x:auto;background:var(--white);border:2px solid var(--line);border-radius:var(--radius)}.admin-table{width:100%;border-collapse:collapse;font-size:.9rem}.admin-table th,.admin-table td{text-align:left;padding:.6rem .8rem;border-bottom:1px solid var(--line);white-space:nowrap}.admin-table th{background:#faf8ff;font-weight:800;color:var(--brand)}.admin-actions{display:flex;flex-wrap:wrap;gap:.5rem}.admin-actions .danger{color:var(--red)}.role-badge{margin-left:.35rem;font-size:.7rem;font-weight:800;color:#fff;background:var(--purple);border-radius:999px;padding:.1rem .45rem}.status-badge{font-size:.78rem;font-weight:800;border-radius:999px;padding:.15rem .55rem}.status-active{background:#dcfce7;color:#15803d}.status-pending{background:#fef3c7;color:#b45309}.status-blocked{background:#fee2e2;color:#b91c1c}.app-header{position:relative;z-index:20;background:var(--page);padding:.45rem 0 .2rem}.header-sticky-row{display:flex;align-items:stretch;gap:.55rem;flex-wrap:wrap}.home-btn{width:112px;height:74px;border:1px solid #e9d5ff;border-radius:17px;padding:0;overflow:hidden;background:#fff;box-shadow:var(--shadow);transition:transform .18s ease,box-shadow .18s ease;flex:0 0 auto}.home-btn:hover{transform:translateY(-1px);box-shadow:0 8px 22px #8b5cf62e}.home-btn img{width:100%;height:100%;object-fit:cover;display:block}.header-tools{display:flex;align-items:center;justify-content:flex-end;gap:.4rem;margin-left:auto}.tool-btn{height:42px;border:1px solid #e9d5ff;background:#fff;color:var(--ink);border-radius:13px;padding:0 .7rem;display:inline-flex;align-items:center;gap:.35rem;font-weight:800;font-size:.88rem;transition:.15s ease}.tool-btn:hover{background:#faf5ff}.user-btn-name{display:flex;flex-direction:column;line-height:1.1;text-align:left}.guest-auth-line{font-size:.78rem}.score-box{display:inline-flex;align-items:center;gap:.35rem;height:42px;padding:0 .7rem;border:1px solid var(--line);background:#fff;border-radius:13px;font-weight:800;font-size:.85rem}.score-box .good{color:#059669}.score-box .bad{color:#e11d48}.score-label{font-size:.78rem}.primary-nav{min-width:0;display:grid;grid-auto-flow:column;grid-auto-columns:minmax(96px,1fr);gap:.45rem;overflow-x:auto;scrollbar-width:none;align-items:stretch;margin-top:.45rem}.primary-nav::-webkit-scrollbar{display:none}.nav-tab{position:relative;min-width:0;min-height:74px;padding:.5rem .42rem;border:1px solid;border-radius:17px;box-shadow:0 3px 10px #0f172a0d;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.22rem;font-weight:900;font-size:.98rem;line-height:1.08;text-align:center;transition:transform .15s ease,box-shadow .15s ease,filter .15s ease;white-space:normal}.nav-tab:hover{transform:translateY(-1px);filter:brightness(1.01);box-shadow:0 7px 17px #4c1d951a}.nav-tab .tab-icon{font-size:1.2rem;line-height:1}.nav-tab.is-active{color:#fff!important;border-color:transparent!important}.tone-purple{background:#f3e8ff;color:#7c3aed;border-color:#ddd6fe}.tone-purple.is-active{background:linear-gradient(90deg,#a855f7,#7c3aed)}.tone-pink{background:#fce7f3;color:#db2777;border-color:#fbcfe8}.tone-pink.is-active{background:linear-gradient(90deg,#f472b6,#ec4899)}.tone-blue{background:#e0f2fe;color:#0369a1;border-color:#bae6fd}.tone-blue.is-active{background:linear-gradient(90deg,#38bdf8,#0284c7)}.tone-amber{background:#fef3c7;color:#b45309;border-color:#fde68a}.tone-amber.is-active{background:linear-gradient(90deg,#fbbf24,#f59e0b)}.tone-green{background:#dcfce7;color:#15803d;border-color:#bbf7d0}.tone-green.is-active{background:linear-gradient(90deg,#4ade80,#16a34a)}.tone-indigo{background:#ede9fe;color:#6d28d9;border-color:#ddd6fe}.tone-indigo.is-active{background:linear-gradient(90deg,#8b5cf6,#6d28d9)}.banner-slot{width:100%;position:relative}.main-banner{border-radius:20px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);background:#fff}.main-banner picture,.main-banner img{width:100%;display:block}.main-banner img{object-fit:cover;max-height:340px}.content-stage{width:100%;padding:.9rem 0 1.2rem;display:block}.app-footer{display:flex;flex-direction:column;align-items:center;gap:.2rem;padding:1rem 0 1.4rem;color:var(--muted);font-size:.85rem;font-weight:700;text-align:center}.app-footer img{max-width:220px;opacity:.9}.home-screen{display:flex;flex-direction:column;gap:.9rem}.grade-switch{display:flex;flex-wrap:wrap;gap:.35rem}.subject-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.85rem}@media(max-width:860px){.subject-grid{grid-template-columns:1fr}}.subject-tile{display:flex;flex-direction:column;gap:.35rem}.subject-card{width:100%;min-height:160px;padding:1.15rem;border:1px solid;border-radius:18px;display:flex;flex-direction:column;align-items:flex-start;gap:.55rem;text-align:left;box-shadow:0 5px 13px #0f172a0d;transition:transform .15s ease,box-shadow .15s ease}.subject-card:hover{transform:translateY(-2px);box-shadow:0 10px 22px #4c1d951f}.subject-card[data-tone=blue]{background:#dff3ff;border-color:#7dd3fc;color:#0369a1}.subject-card[data-tone=pink]{background:#fce3f0;border-color:#f9a8d4;color:#be185d}.subject-card[data-tone=green]{background:#dcfce7;border-color:#86efac;color:#047857}.card-icon{width:52px;height:52px;flex:0 0 52px;display:grid;place-items:center;background:#ffffffd1;border-radius:16px;font-size:1.6rem}.card-main{display:flex;flex-direction:column;gap:.25rem}.card-title{font-size:1.1rem;font-weight:900}.card-desc{font-size:.92rem;opacity:.85;font-weight:600}.subject-card .badge{margin-top:auto;background:#ffffffd1;color:inherit;border-radius:999px;padding:.16rem .6rem;font-size:.75rem;font-weight:800}.profile-link{display:inline-flex;align-items:center;gap:.3rem;align-self:flex-start;background:none;border:none;color:var(--muted);font-size:.82rem;font-weight:700;padding:.15rem .2rem}.profile-link:hover{color:var(--purple)}.home-note{display:flex;align-items:center;gap:.6rem;padding:.8rem 1rem;border-radius:16px;background:#fff;border:1px solid var(--line);color:var(--muted);font-weight:700;font-size:.9rem}.stack{display:flex;flex-direction:column;gap:.6rem}.topic-list{display:flex;flex-direction:column;gap:.5rem}.topic-block{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}.topic-header{width:100%;display:flex;align-items:center;gap:.6rem;padding:.85rem 1rem;background:none;border:none;text-align:left;font-weight:800}.topic-name{flex:1;min-width:0}.topic-count{color:var(--muted);font-size:.8rem;font-weight:700}.topic-chevron{transition:transform .18s ease;color:var(--muted)}.topic-chevron.open{transform:rotate(90deg)}.topic-body{padding:0 1rem 1rem;display:flex;flex-direction:column;gap:.6rem}.question-preview{background:#fffdf5;border:1px solid var(--line);border-radius:14px;padding:.7rem .85rem;display:flex;flex-direction:column;gap:.3rem;font-size:.9rem}.question-preview p{margin:0;white-space:pre-line;font-weight:600}.exam-group{margin-bottom:1rem}.group-title{font-size:1.02rem;color:#5b216e;margin:0 0 .5rem}.lesson-hero{margin:.4rem 0 .8rem}.lesson-hero h1{margin:.2rem 0 .35rem;color:#5b216e;font-size:1.5rem;line-height:1.15;font-weight:950}.lesson-intro{display:flex;align-items:flex-start;gap:.4rem;font-weight:700;color:var(--ink)}.lesson-pages{display:flex;flex-wrap:wrap;gap:.4rem;margin-bottom:.9rem}.lesson-page-tab{display:inline-flex;align-items:center;gap:.35rem;padding:.45rem .8rem;border-radius:999px;border:1px solid var(--line);background:#fff;font-weight:800;font-size:.86rem;transition:.15s ease}.lesson-page-tab:hover{border-color:var(--purple)}.lesson-page-tab.is-active{background:linear-gradient(135deg,var(--purple),var(--pink));border-color:transparent;color:#fff}.lesson-page-nav{display:flex;align-items:center;justify-content:space-between;gap:.6rem;margin-top:1rem}.page-indicator{color:var(--muted);font-weight:700;font-size:.85rem}.lesson-progress-line{display:flex;flex-direction:column;gap:.3rem;margin-bottom:.7rem;font-size:.85rem;font-weight:700;color:var(--muted)}.sub-heading{margin:.9rem 0 .4rem;font-size:1rem;color:#5b216e}.recall-box{background:#fff;border-left:4px solid var(--purple);border-radius:12px;padding:.75rem .9rem;font-weight:700;margin:0 0 .8rem}.practice-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.7rem;counter-reset:practice}.practice-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:.85rem .95rem;display:flex;flex-direction:column;gap:.55rem}.practice-item.ok{border-color:#86efac}.practice-item.no{border-color:#fda4af}.practice-prompt{margin:0;font-weight:700;white-space:pre-line}.visual-model-list{display:flex;flex-direction:column;gap:.5rem;margin-top:.8rem}.visual-model{background:#eff8ff;border:1px solid #bae6fd;border-radius:14px;padding:.7rem .85rem}.visual-model p{margin:.25rem 0 0;font-size:.9rem}.teacher-prompts{margin-top:.9rem;background:#fff7ed;border:1px solid #fed7aa;border-radius:16px;padding:.85rem .95rem}.teacher-prompts h3{margin:0 0 .4rem;font-size:.95rem;color:#9a3412}.teacher-prompts ul{margin:0;padding-left:1.1rem;display:flex;flex-direction:column;gap:.3rem;font-size:.9rem}.mistake-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.35rem}.mistake-list li{display:flex;align-items:flex-start;gap:.4rem;background:#fff1f2;border:1px solid #fecdd3;border-radius:12px;padding:.55rem .7rem;font-size:.9rem;font-weight:600}.finish-prompt{display:flex;align-items:flex-start;gap:.45rem;margin-top:1rem;background:linear-gradient(135deg,#f5f3ff,#fdf2f8);border:1px solid var(--line);border-radius:16px;padding:.85rem .95rem;font-weight:800;color:#5b216e}.solution-text{margin:0;font-size:.9rem;color:var(--muted);font-weight:600}.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:.7rem;margin-bottom:.9rem}.stat-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:.8rem .9rem;display:flex;flex-direction:column;gap:.2rem}.stat-label{color:var(--muted);font-size:.8rem;font-weight:700}.stat-value{font-size:1.5rem;font-weight:950;color:#5b216e}.competency-list{display:flex;flex-direction:column;gap:.6rem}.competency-head{display:flex;justify-content:space-between;gap:.6rem;font-size:.88rem;margin-bottom:.25rem}.competency-head span{color:var(--muted);font-weight:700}.bar-chart{display:flex;align-items:flex-end;gap:.4rem;height:170px;padding:.5rem .25rem 0;overflow-x:auto}.bar-col{display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:.25rem;min-width:42px;flex:1;height:100%}.bar{width:100%;max-width:38px;background:linear-gradient(180deg,#a855f7,#7c3aed);border-radius:8px 8px 0 0;min-height:6px}.bar-value{font-size:.75rem;font-weight:800;color:var(--muted)}.bar-col small{font-size:.65rem;color:var(--muted);white-space:nowrap}.attempt-table-wrap{overflow-x:auto}.attempt-table{width:100%;border-collapse:collapse;font-size:.86rem}.attempt-table th,.attempt-table td{text-align:left;padding:.45rem .55rem;border-bottom:1px solid var(--line);white-space:nowrap}.attempt-table th{color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.03em}.score-pass{color:var(--green)}.score-try{color:var(--red)}.comment-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.45rem}.comment-list li{display:flex;align-items:flex-start;gap:.45rem;border-radius:12px;padding:.6rem .75rem;font-size:.9rem;font-weight:600}.comment-list li.good{background:#ecfdf5;border:1px solid #a7f3d0;color:#065f46}.comment-list li.warn{background:#fffbeb;border:1px solid #fde68a;color:#92400e}.wrong-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.6rem}.wrong-list ul{margin:.3rem 0 0;padding-left:1.1rem;font-size:.88rem}@media(max-width:640px){.home-btn{width:84px;height:60px}.nav-tab{min-height:62px;font-size:.86rem}.main-banner img{max-height:190px}}.reading-text{margin:14px 0;padding:14px 16px;border-radius:14px;background:#fff;border:1px solid #e2e8f0;line-height:1.75}.reading-text p{margin:0 0 10px}.reading-text p:last-child{margin-bottom:0}.vocab-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px;margin:10px 0 16px}.vocab-card{padding:10px 12px;border-radius:12px;background:#f8fafc;border:1px solid #e2e8f0}.vocab-card b{display:block;color:#1d4ed8}.vocab-card small{display:block;color:#64748b;font-size:.78rem}.vocab-card span{color:#334155;font-size:.88rem}.vocab-chip{display:inline-block;padding:6px 12px;margin:0 6px 6px 0;border-radius:999px;background:#eef2ff;color:#3730a3;font-weight:600}.phonics-card{margin:14px 0;padding:14px 16px;border-radius:14px;background:#ecfdf5;border:1px solid #a7f3d0}.dialogue{padding:12px 16px;border-radius:14px;background:#f8fafc;border:1px solid #e2e8f0;line-height:1.8}.dialogue p{margin:0 0 6px}.building-note{padding:22px;border-radius:16px;background:#fffbeb;border:1px dashed #fcd34d;text-align:center}