/* ===== EduKids design system (education.com-inspired) ===== */
@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@500;600;700;800&family=Outfit:wght@600;700;800&display=swap');

:root{
  --blue:#1a7fc1;
  --blue-dark:#135f93;
  --teal:#14a3a8;
  --teal-dark:#0e7f83;
  --green:#2f9e6b;
  --green-soft:#e8f7ef;
  --coral:#f07a3a;
  --coral-dark:#d96528;
  --amber:#f0a202;
  --red:#e25b5b;
  --purple:#6b7fd7;
  --pink:#e86b9a;
  --ink:#1e293b;
  --muted:#64748b;
  --line:#e2e8f0;
  --bg:#f7fafc;
  --card:#fff;
  --radius:14px;
  --radius-lg:20px;
  --shadow:0 2px 10px rgba(30,41,59,.06);
  --shadow-lg:0 12px 32px rgba(30,41,59,.12);
  --font:"Nunito","Trebuchet MS","Segoe UI",sans-serif;
  --display:"Outfit","Nunito",sans-serif;
  --brand-blue:#1a7fc1;
  --brand-green:#2f9e6b;
}
*{box-sizing:border-box}html,body{margin:0;padding:0}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--teal);text-decoration:none}a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.container{width:min(1120px,92vw);margin:0 auto}
.muted{color:var(--muted)}.center{text-align:center}

/* Header */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.nav{display:flex;align-items:center;gap:18px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--display);font-weight:800;font-size:22px;color:var(--ink);letter-spacing:-.02em}
.brand:hover{text-decoration:none}
.brand .mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(145deg,var(--teal),var(--blue));display:grid;place-items:center;color:#fff;font-size:18px;box-shadow:0 4px 10px rgba(20,163,168,.28)}
.brand .edu{color:var(--blue)}.brand .kids{color:var(--green)}
.nav-links{display:flex;gap:4px;margin-left:4px}
.nav-links a{color:#334155;font-weight:700;padding:8px 12px;border-radius:10px;font-size:15px}
.nav-links a:hover{color:var(--teal);background:#eef8f8;text-decoration:none}
.nav-spacer{flex:1}.nav-auth{display:flex;align-items:center;gap:10px}
.child-chip{display:inline-flex;align-items:center;gap:6px;background:#eef8f8;border:1px solid #cfeceb;border-radius:999px;padding:4px 12px 4px 6px;font-weight:700;cursor:pointer;font-size:14px;color:var(--ink)}
.child-chip .av{width:26px;height:26px;border-radius:50%;background:#fff;display:grid;place-items:center;font-size:15px}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;cursor:pointer;font-family:inherit;font-weight:800;padding:11px 20px;border-radius:999px;font-size:15px;transition:transform .12s,box-shadow .15s,background .15s,border-color .15s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}.btn:active{transform:translateY(0)}
.btn-primary{background:var(--coral);color:#fff;box-shadow:0 6px 16px rgba(240,122,58,.28)}.btn-primary:hover{background:var(--coral-dark)}
.btn-amber{background:var(--amber);color:#fff}.btn-amber:hover{background:#d98f00}
.btn-green{background:var(--green);color:#fff}.btn-green:hover{background:#248556}
.btn-teal{background:var(--teal);color:#fff;box-shadow:0 6px 16px rgba(20,163,168,.25)}.btn-teal:hover{background:var(--teal-dark)}
.btn-ghost{background:#eef8f8;color:var(--teal-dark)}.btn-ghost:hover{background:#d9f1f1}
.btn-outline{background:#fff;color:var(--ink);border:2px solid var(--line)}.btn-outline:hover{border-color:#b8c4d4}
.btn-sm{padding:7px 14px;font-size:14px}.btn-lg{padding:14px 28px;font-size:17px}
.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none}

/* Hero */
.hero{position:relative;background:
  radial-gradient(ellipse 80% 60% at 85% 20%,rgba(20,163,168,.18),transparent 55%),
  radial-gradient(ellipse 50% 50% at 10% 80%,rgba(47,158,107,.12),transparent 50%),
  linear-gradient(160deg,#e8f6f7 0%,#f4fafb 45%,#eef7f2 100%);
  padding:56px 0 64px;overflow:hidden}
.hero .blob{display:none}
@keyframes rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}
@keyframes drift{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center}
.hero-copy{animation:rise .7s ease both}
.hero .brand-lockup{font-family:var(--display);font-weight:800;font-size:15px;letter-spacing:.08em;text-transform:uppercase;color:var(--teal);margin:0 0 14px}
.hero h1{font-family:var(--display);font-size:clamp(34px,4.5vw,52px);line-height:1.08;margin:0 0 16px;letter-spacing:-.03em;color:var(--ink)}
.hero h1 .hl{color:var(--teal);background:linear-gradient(120deg,var(--teal),var(--blue));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p.lead{font-size:18px;color:#475569;margin:0 0 26px;max-width:480px;font-weight:600}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.hero-visual{position:relative;border-radius:24px;overflow:hidden;min-height:320px;box-shadow:var(--shadow-lg);animation:rise .8s .12s ease both}
.hero-visual img{width:100%;height:100%;object-fit:cover;min-height:320px;animation:drift 8s ease-in-out infinite}
.hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(232,246,247,.15),transparent 40%);pointer-events:none}
.home-search{display:flex;gap:0;max-width:480px;background:#fff;border-radius:999px;box-shadow:var(--shadow);overflow:hidden;border:1px solid var(--line);margin-top:18px}
.home-search input{flex:1;border:none;outline:none;font-family:inherit;font-size:16px;padding:14px 20px;background:transparent;font-weight:600}
.home-search button{border:none;background:var(--teal);color:#fff;font-family:inherit;font-weight:800;font-size:15px;padding:0 22px;cursor:pointer}
.home-search button:hover{background:var(--teal-dark)}

/* Page hero (inner pages) */
.page-hero{padding:36px 0 28px;background:linear-gradient(160deg,#e8f6f7,#f7fafc)}
.page-hero h1{font-family:var(--display);margin:0;font-size:34px;letter-spacing:-.02em}
.page-hero .lead{margin:8px 0 0;color:var(--muted);font-weight:600}

/* Sections */
section.block{padding:64px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:28px;flex-wrap:wrap;gap:10px}
.section-head h2{font-family:var(--display);font-size:30px;margin:0;letter-spacing:-.02em}
.section-head p{margin:4px 0 0;font-weight:600}
.eyebrow{color:var(--teal);font-weight:800;letter-spacing:.06em;text-transform:uppercase;font-size:12px;margin:0 0 6px}

/* Learning library tiles (education.com style) */
.library-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.lib-tile{display:grid;grid-template-columns:88px 1fr;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s,border-color .15s;color:var(--ink)}
.lib-tile:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);text-decoration:none;border-color:#b9e4e6}
.lib-tile .ic{width:88px;height:88px;border-radius:18px;display:grid;place-items:center;font-size:36px;flex:none}
.lib-tile h3{margin:0 0 6px;font-family:var(--display);font-size:20px}
.lib-tile p{margin:0 0 10px;color:var(--muted);font-size:14px;font-weight:600;line-height:1.45}
.lib-tile .go{font-weight:800;color:var(--teal);font-size:14px}

/* Grade chips */
.grade-row{display:grid;grid-template-columns:repeat(7,1fr);gap:10px}
.grade-card{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;text-align:center;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 8px;box-shadow:var(--shadow);font-weight:800;color:var(--ink);transition:transform .12s,border-color .12s,box-shadow .12s;min-height:96px}
.grade-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);text-decoration:none;border-color:var(--teal);color:var(--teal)}
.grade-card .ge{width:36px;height:36px;border-radius:10px;background:#eef8f8;color:var(--teal);display:grid;place-items:center;font-family:var(--display);font-size:14px;font-weight:800}
.grade-card small{display:block;color:var(--muted);font-weight:700;font-size:11px}

/* Subject grid */
.subject-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.subject-card{background:var(--card);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);display:flex;gap:14px;align-items:center;border:1px solid var(--line);transition:transform .12s,box-shadow .15s,border-color .15s}
.subject-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);text-decoration:none;border-color:#b9e4e6}
.subject-icon{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;font-size:24px;flex:none}
.subject-card h3{margin:0 0 2px;font-size:17px;font-family:var(--display);color:var(--ink)}.subject-card p{margin:0;font-size:13px;color:var(--muted);font-weight:600}

/* Cards */
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column;transition:transform .12s,box-shadow .15s;position:relative}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.card-thumb{height:118px;display:grid;place-items:center;font-size:40px;color:#fff;position:relative}
.card-grade{position:absolute;top:10px;left:10px;background:rgba(255,255,255,.95);color:var(--ink);font-size:11px;font-weight:800;padding:3px 10px;border-radius:999px}
.card-badge{position:absolute;bottom:10px;right:10px;background:rgba(15,23,42,.5);color:#fff;font-size:11px;font-weight:800;padding:3px 9px;border-radius:999px}
.card-fav{position:absolute;top:8px;right:8px;background:rgba(255,255,255,.95);border:none;width:32px;height:32px;border-radius:50%;cursor:pointer;font-size:15px;display:grid;place-items:center;z-index:2}
.card-body{padding:14px 16px;flex:1;display:flex;flex-direction:column}
.card-body h3{margin:0 0 6px;font-size:15px;line-height:1.3;font-family:var(--display)}.card-body h3 a{color:var(--ink)}
.card-meta{font-size:12px;color:var(--muted);margin-top:auto;display:flex;gap:10px;align-items:center;padding-top:8px;flex-wrap:wrap;font-weight:700}
.tag{font-size:11px;font-weight:800;padding:3px 9px;border-radius:999px;background:#eef8f8;color:var(--teal-dark)}
.tag.live{background:var(--green-soft);color:#1f7a52}.tag.lesson{background:#eef0fb;color:#4456b8}

/* Premium band */
.premium-band{background:linear-gradient(135deg,#0f766e 0%,#1a7fc1 100%);color:#fff;position:relative;overflow:hidden}
.premium-band::before{content:"";position:absolute;width:280px;height:280px;border-radius:50%;background:rgba(255,255,255,.08);top:-80px;right:-40px}
.premium-band h2,.premium-band h3{color:#fff}
.premium-band .lead{color:rgba(255,255,255,.88);font-weight:600}
.premium-features{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:28px}
.premium-feat{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.18);border-radius:16px;padding:22px;backdrop-filter:blur(4px)}
.premium-feat h3{margin:0 0 8px;font-family:var(--display);font-size:18px}
.premium-feat p{margin:0;color:rgba(255,255,255,.85);font-size:14px;font-weight:600}

/* Trust / community */
.trust{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;text-align:center}
.trust .t{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 16px;box-shadow:var(--shadow)}
.trust .t b{display:block;font-family:var(--display);font-size:34px;color:var(--teal);line-height:1}.trust .t span{color:var(--muted);font-weight:700;font-size:14px}
.quotes{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.quote{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.quote p{margin:0 0 14px;font-size:15px;font-weight:600;color:#334155}.quote .who{font-weight:800;color:var(--ink);font-size:14px}.quote .role{color:var(--muted);font-weight:600;font-size:13px}

/* CTA band */
.cta-band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-band h2{font-family:var(--display);font-size:32px;margin:0 0 10px;letter-spacing:-.02em}

/* Library */
.lib{display:grid;grid-template-columns:240px 1fr;gap:28px;align-items:start;padding:30px 0 60px}
.filters{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;position:sticky;top:84px}
.filters h4{margin:14px 0 8px;font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);font-weight:800}.filters h4:first-child{margin-top:0}
.filter-opt{display:block;padding:5px 0;cursor:pointer;font-size:15px;font-weight:600}.filter-opt input{margin-right:8px}
.searchbar{display:flex;gap:10px;margin-bottom:18px}
.searchbar input,.searchbar select,.filters select{font-family:inherit;font-size:15px;padding:10px 12px;border:2px solid var(--line);border-radius:10px;background:#fff;font-weight:600}
.searchbar input{flex:1}
.lib-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;flex-wrap:wrap;gap:8px}

/* Worksheet detail / preview */
.detail{display:grid;grid-template-columns:1.4fr 1fr;gap:34px;padding:30px 0 60px;align-items:start}
.ws-preview{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:34px;min-height:400px}
.ws-preview h1.sheet-title{font-size:26px;margin:0 0 4px;font-family:var(--display)}
.ws-preview .name-row{display:flex;justify-content:space-between;border-bottom:2px solid var(--line);padding-bottom:10px;margin-bottom:18px;color:var(--muted);font-size:14px}
.ws-intro{font-weight:700;margin:0 0 14px}
ol.ws-problems{list-style:none;padding:0;margin:0;display:grid;gap:12px}
ol.ws-problems.cols-2{grid-template-columns:1fr 1fr;column-gap:30px}
ol.ws-problems li{display:flex;gap:8px;align-items:baseline;font-size:17px}
ol.ws-problems .qn{color:var(--muted);width:26px;flex:none}.ws-problems .q{font-weight:600}.ws-problems .ans{color:#c9ccd1;margin-left:6px}
.passage{background:#f0f9f9;border-left:4px solid var(--teal);padding:14px 18px;border-radius:8px;margin-bottom:18px}
.planner p,.lines{margin:8px 0}.lines .line{border-bottom:2px solid var(--line);height:26px}
.detail-side .card-thumb{height:150px;border-radius:var(--radius);font-size:60px}
.detail-side h1{font-size:26px;margin:16px 0 6px;font-family:var(--display)}
.crumbs{font-size:14px;color:var(--muted);padding:16px 0 0;font-weight:600}

/* Interactive practice */
.practice{max-width:760px;margin:0 auto;padding:24px 0 60px}
.q-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px;margin-bottom:16px}
.q-num{color:var(--teal);font-weight:800;font-size:13px;text-transform:uppercase;letter-spacing:.04em}
.q-text{font-size:24px;font-weight:800;margin:6px 0 16px;font-family:var(--display)}
.q-choices{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.q-choice{font-family:inherit;font-size:18px;font-weight:700;text-align:left;padding:14px 18px;border-radius:12px;border:2px solid var(--line);background:#fff;cursor:pointer;transition:border-color .1s}
.q-choice:hover{border-color:var(--teal)}.q-choice.sel{border-color:var(--teal);background:#eef8f8}
.q-choice.correct{border-color:var(--green);background:var(--green-soft)}.q-choice.wrong{border-color:var(--red);background:#fdeaea}
.q-fill{font-family:inherit;font-size:22px;padding:12px 16px;border:2px solid var(--line);border-radius:12px;width:200px;font-weight:700}
.q-fill:focus{border-color:var(--teal);outline:none}
.q-fill.correct{border-color:var(--green);background:var(--green-soft)}.q-fill.wrong{border-color:var(--red);background:#fdeaea}
.progress-track{height:10px;background:#e7eaf0;border-radius:999px;overflow:hidden;margin:6px 0 22px}
.progress-track>span{display:block;height:100%;background:linear-gradient(90deg,var(--teal),var(--blue));transition:width .3s}

/* Games */
.game-stage{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:34px;text-align:center;min-height:420px;display:flex;flex-direction:column;justify-content:center;align-items:center}
.game-hud{display:flex;gap:26px;justify-content:center;margin-bottom:8px;font-weight:800}
.game-hud .hud-val{font-size:30px;color:var(--teal)}.game-hud .hud-label{font-size:12px;text-transform:uppercase;color:var(--muted);letter-spacing:.05em}
.game-prompt{font-size:52px;font-weight:800;margin:18px 0;letter-spacing:.02em;font-family:var(--display)}
.game-input{font-family:inherit;font-size:30px;text-align:center;width:220px;padding:10px;border:3px solid var(--line);border-radius:12px;font-weight:700}.game-input:focus{border-color:var(--teal);outline:none}
.choices{display:grid;grid-template-columns:1fr 1fr;gap:14px;width:min(420px,90%);margin:10px auto 0}
.choice{font-family:inherit;font-size:26px;font-weight:800;padding:18px;border-radius:14px;border:3px solid var(--line);background:#fff;cursor:pointer}.choice:hover{border-color:var(--teal)}
.choice.correct{background:var(--green);color:#fff;border-color:var(--green)}.choice.wrong{background:var(--red);color:#fff;border-color:var(--red)}
.flash{font-size:22px;font-weight:800;min-height:28px}.flash.ok{color:var(--green)}.flash.no{color:var(--red)}
.memory-grid{display:grid;grid-template-columns:repeat(4,84px);gap:12px;justify-content:center}
.mcard{height:84px;border-radius:12px;border:3px solid var(--line);background:var(--teal);color:#fff;font-size:26px;font-weight:800;display:grid;place-items:center;cursor:pointer;user-select:none}
.mcard.face{background:#fff;color:var(--ink)}.mcard.done{background:var(--green);color:#fff;cursor:default}

/* Lesson player */
.lesson-stage{max-width:720px;margin:0 auto;padding:24px 0 60px}
.lesson-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:34px;min-height:300px}
.lesson-card.teach{border-top:6px solid var(--blue)}
.lesson-card.quiz{border-top:6px solid var(--coral)}
.lesson-card h2{margin:0 0 14px;font-size:26px;font-family:var(--display)}
.lesson-card .teach-body{font-size:19px;line-height:1.7;font-weight:600}
.lesson-nav{display:flex;justify-content:space-between;margin-top:20px}
.step-dots{display:flex;gap:6px;justify-content:center;margin-bottom:18px}
.step-dots .dot{width:10px;height:10px;border-radius:50%;background:#d8deea}
.step-dots .dot.active{background:var(--teal)}.step-dots .dot.done{background:var(--green)}

/* Auth */
.auth-wrap{display:grid;place-items:center;padding:50px 0}
.auth-card{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow-lg);padding:34px;width:min(420px,92vw)}
.auth-card h1{margin:0 0 4px;font-size:26px;font-family:var(--display)}
.field{margin:14px 0}.field label{display:block;font-weight:800;margin-bottom:6px;font-size:14px}
.field input,.field select{width:100%;font-family:inherit;font-size:16px;padding:11px 13px;border:2px solid var(--line);border-radius:10px;font-weight:600}
.field input:focus{border-color:var(--teal);outline:none}
.alert{background:#fde8e8;color:#b91c1c;padding:10px 14px;border-radius:10px;font-size:14px;margin:10px 0;display:none;font-weight:600}.alert.show{display:block}
.role-toggle{display:flex;gap:8px}
.role-toggle label{flex:1;text-align:center;border:2px solid var(--line);border-radius:10px;padding:9px;cursor:pointer;font-weight:700}
.role-toggle label:has(input:checked){border-color:var(--teal);background:#eef8f8}.role-toggle input{display:none}

/* Dashboard */
.dash-head{background:linear-gradient(160deg,#e8f6f7,#eef7f2);padding:34px 0}
.profiles{display:flex;gap:14px;flex-wrap:wrap;margin-top:18px}
.profile{background:#fff;border:2px solid transparent;border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 18px;display:flex;gap:12px;align-items:center;cursor:pointer;min-width:200px;transition:border-color .1s,transform .1s}
.profile:hover{transform:translateY(-2px)}.profile.active{border-color:var(--teal)}
.profile .av{width:48px;height:48px;border-radius:50%;background:#eef8f8;display:grid;place-items:center;font-size:26px}
.profile .nm{font-weight:800}.profile .sub{font-size:13px;color:var(--muted);font-weight:600}
.profile.add{justify-content:center;color:var(--teal);font-weight:800;border:2px dashed #b9e4e6;box-shadow:none;background:#fbfefe}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:22px 0 0}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.stat .n{font-size:34px;font-weight:800;color:var(--teal);line-height:1;font-family:var(--display)}.stat .l{color:var(--muted);font-size:14px;margin-top:4px;font-weight:700}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;margin-bottom:22px}
.panel h2{margin:0 0 14px;font-size:21px;font-family:var(--display)}
.prog-row{display:flex;align-items:center;gap:14px;padding:10px 0;border-bottom:1px solid var(--line)}.prog-row:last-child{border-bottom:none}
.prog-icon{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;font-size:20px;flex:none}
.bar{flex:1;height:10px;background:#eef2f7;border-radius:999px;overflow:hidden}.bar>span{display:block;height:100%;background:var(--green)}
.empty{text-align:center;color:var(--muted);padding:30px;font-weight:600}

/* Level + achievements */
.level-card{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.ring{--p:0;width:96px;height:96px;border-radius:50%;flex:none;background:conic-gradient(var(--teal) calc(var(--p)*1%),#e7eaf0 0);display:grid;place-items:center}
.ring .inner{width:74px;height:74px;border-radius:50%;background:#fff;display:grid;place-items:center;flex-direction:column;text-align:center}
.ring .inner b{font-size:24px;line-height:1}.ring .inner span{font-size:11px;color:var(--muted)}
.badge-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.badge{text-align:center;padding:16px 8px;border-radius:var(--radius);border:1px solid var(--line);background:#fff;transition:transform .1s}
.badge:hover{transform:translateY(-3px)}
.badge.locked{opacity:.4;filter:grayscale(1)}
.badge .ic{font-size:34px}.badge .bn{font-weight:800;font-size:13px;margin-top:6px}.badge .bd{font-size:11px;color:var(--muted);margin-top:2px;font-weight:600}

/* Gradebook */
.gradebook{overflow-x:auto}
table.grade{border-collapse:collapse;width:100%;font-size:14px}
table.grade th,table.grade td{border:1px solid var(--line);padding:8px 10px;text-align:center}
table.grade th{background:#f0f9f9;font-weight:800}
table.grade td.name,table.grade th.name{text-align:left;position:sticky;left:0;background:#fff;font-weight:800}
.gb-cell{cursor:pointer;display:inline-flex;min-width:34px;justify-content:center;border-radius:8px;padding:2px 6px;font-weight:700}
.gb-cell.done{background:var(--green-soft);color:#1f7a52}.gb-cell.todo{color:#c2c8d2}
.code-pill{display:inline-block;background:#1e293b;color:#fff;font-family:monospace;letter-spacing:.15em;padding:4px 12px;border-radius:8px;font-size:16px}

/* Footer */
.site-footer{background:#0f172a;color:#94a3b8;padding:48px 0 30px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px}
.site-footer h4{color:#fff;margin:0 0 12px;font-size:14px;font-family:var(--display);letter-spacing:.02em}
.site-footer a{color:#94a3b8;display:block;padding:3px 0;font-size:14px;font-weight:600}.site-footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid #1e293b;margin-top:26px;padding-top:18px;font-size:13px;color:#64748b;font-weight:600}

/* Toast + modal */
#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:12px 22px;border-radius:999px;font-weight:700;opacity:0;transition:all .25s;z-index:100;pointer-events:none}#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.modal-bg{position:fixed;inset:0;background:rgba(15,23,42,.5);display:none;place-items:center;z-index:200;padding:20px}.modal-bg.show{display:grid}
.modal{background:#fff;border-radius:18px;box-shadow:var(--shadow-lg);padding:26px;width:min(460px,94vw);max-height:90vh;overflow:auto}
.modal h2{margin:0 0 12px;font-family:var(--display)}
.avatar-pick{display:flex;gap:8px;flex-wrap:wrap;margin:6px 0}
.avatar-pick button{font-size:24px;width:46px;height:46px;border-radius:12px;border:2px solid var(--line);background:#fff;cursor:pointer}
.avatar-pick button.sel{border-color:var(--teal);background:#eef8f8}

/* Responsive */
.teacher-split{display:grid;grid-template-columns:1.2fr .8fr;gap:32px;align-items:center}

@media (max-width:900px){
  .hero-grid,.detail,.library-grid,.premium-features,.quotes,.teacher-split{grid-template-columns:1fr}
  .hero h1{font-size:34px}
  .hero-visual{min-height:220px}.hero-visual img{min-height:220px}
  .subject-grid,.card-grid{grid-template-columns:repeat(2,1fr)}
  .grade-row{grid-template-columns:repeat(3,1fr)}
  .trust{grid-template-columns:1fr}
  .lib{grid-template-columns:1fr}.filters{position:static}
  .stat-grid{grid-template-columns:repeat(2,1fr)}.badge-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}.nav-links{display:none}.q-choices{grid-template-columns:1fr}
  .lib-tile{grid-template-columns:64px 1fr}.lib-tile .ic{width:64px;height:64px;font-size:28px}
}
@media print{.site-header,.site-footer,.detail-side,.crumbs,#toast,.no-print{display:none!important}.detail{display:block}.ws-preview{border:none;box-shadow:none;padding:0}body{background:#fff}}