/* International Abacus – App UI v2 */
:root{--brand:#2b2a8c;--brand-2:#6d5cff;--yellow:#ffc928;--bg:#f4f5fb;--card:#fff;--ink:#14162b;--muted:#6b7090;--line:#e6e8f2;--ok:#16a34a;--err:#dc2626;--warn:#d97706;--wa:#25d366;--r:16px;
--shadow:0 1px 2px rgba(20,22,60,.04),0 8px 24px rgba(20,22,60,.06);--font:"Plus Jakarta Sans",system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans",sans-serif;--kid:"Baloo 2","Plus Jakarta Sans",system-ui,sans-serif;
--safe-b:env(safe-area-inset-bottom,0px);--safe-t:env(safe-area-inset-top,0px)}
*{box-sizing:border-box}
html,body{margin:0}
body{min-height:100vh;font-family:var(--font);background:var(--bg);color:var(--ink);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}
a{color:var(--brand)}
img{max-width:100%}
h1{font-size:1.55rem;margin:.2em 0 .6em;letter-spacing:-.01em}h2{font-size:1.15rem;margin:1.2em 0 .5em}h3{font-size:1rem;margin:1em 0 .4em}
.muted{color:var(--muted)}.small{font-size:.85rem}.center{text-align:center}.right{text-align:right}.nowrap{white-space:nowrap}
.wrap{max-width:1180px;margin:0 auto;padding:20px}.wrap.narrow{max-width:520px}.wrap.wide{max-width:1500px}
[hidden]{display:none!important}

/* ---------- legacy top bar (parent) ---------- */
.topbar{background:var(--brand);color:#fff;display:flex;align-items:center;gap:12px;padding:10px 16px;position:sticky;top:0;z-index:20}
.brand{display:flex;align-items:center;gap:8px;color:#fff;text-decoration:none;font-weight:800;margin-right:auto}
.brand img{height:34px;background:#fff;border-radius:8px;padding:2px}
.nav a{color:#fff;text-decoration:none;padding:7px 12px;border-radius:9px;background:rgba(255,255,255,.15)}

/* ---------- STAFF LAYOUT (sidebar) ---------- */
body.staff{padding-left:262px}
.side{position:fixed;inset:0 auto 0 0;width:262px;background:#0f1030;color:#cfd2ec;display:flex;flex-direction:column;z-index:50;transition:transform .2s}
.side-brand{display:flex;align-items:center;gap:10px;padding:18px 16px;text-decoration:none;color:#fff;border-bottom:1px solid rgba(255,255,255,.07)}
.side-brand img{width:42px;height:42px;object-fit:contain;background:#fff;border-radius:12px;padding:3px}
.side-logo{width:42px;height:42px;border-radius:12px;background:var(--brand);display:grid;place-items:center;font-size:22px}
.side-brand span{font-weight:800;line-height:1.15;font-size:.98rem}
.side-brand small{display:block;font-weight:600;color:var(--yellow);font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;margin-top:2px}
.side-nav{flex:1;overflow-y:auto;padding:8px 10px 16px}
.side-group{font-size:.68rem;text-transform:uppercase;letter-spacing:.12em;color:#7d80a8;margin:16px 10px 6px;font-weight:700}
.side-nav a{display:flex;align-items:center;gap:10px;color:#cfd2ec;text-decoration:none;padding:9px 12px;border-radius:12px;font-weight:600;font-size:.92rem;margin-bottom:2px}
.side-nav a:hover{background:rgba(255,255,255,.06);color:#fff}
.side-nav a.active{background:linear-gradient(90deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 6px 16px rgba(0,0,0,.25)}
.ni{width:26px;height:26px;display:grid;place-items:center;font-size:16px;background:rgba(255,255,255,.06);border-radius:8px;flex:none}
.side-nav a.active .ni{background:rgba(255,255,255,.18)}
.side-foot{padding:12px;border-top:1px solid rgba(255,255,255,.07);display:flex;flex-wrap:wrap;gap:8px}
.side-user{display:flex;gap:10px;align-items:center;width:100%;color:#fff}
.side-user small{display:block;color:#7d80a8;font-size:.75rem}
.av{width:36px;height:36px;border-radius:50%;background:var(--yellow);color:#2b2200;display:grid;place-items:center;font-weight:800;flex:none}
.side-foot .btn{flex:1;text-align:center;background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.1);color:#fff}
.side-foot .btn.danger{color:#fca5a5}
.staff-top{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:12px;padding:12px 20px;background:rgba(244,245,251,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.staff-title{font-weight:800;font-size:1.05rem}
.menu-btn{display:none;background:#fff;border:1px solid var(--line);width:40px;height:40px;border-radius:12px;font-size:1.2rem;cursor:pointer}
.side-dim{display:none}
@media(max-width:980px){
 body.staff{padding-left:0}
 .side{transform:translateX(-100%)}
 .nav-open .side{transform:none;box-shadow:0 0 0 100vmax rgba(10,10,30,.45)}
 .nav-open .side-dim{display:block;position:fixed;inset:0;z-index:45}
 .menu-btn{display:grid;place-items:center}
 .wrap{padding:14px}
}

/* ---------- cards, grid, stats ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;margin-bottom:16px;box-shadow:var(--shadow)}
.card>h2:first-child,.card>h3:first-child{margin-top:0}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}
.grid.two{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.grid.three{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;box-shadow:var(--shadow)}
.stat b{display:block;font-size:1.6rem}
.stat span{color:var(--muted);font-size:.85rem}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.spacer{flex:1}
.page-head{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-bottom:16px}
.page-head h1{margin:0}
.page-head p{margin:2px 0 0}

/* KPI tiles */
.kpis{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));margin-bottom:16px}
.kpi{position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px 16px 14px;box-shadow:var(--shadow);overflow:hidden;text-decoration:none;color:var(--ink)}
.kpi .k-ic{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;font-size:20px;margin-bottom:10px;background:var(--tint,#eef0ff)}
.kpi b{display:block;font-size:1.65rem;line-height:1.1;letter-spacing:-.02em}
.kpi span{color:var(--muted);font-size:.84rem;font-weight:600}
.kpi small{position:absolute;top:16px;right:14px;font-weight:700;font-size:.75rem;color:var(--muted)}
.kpi:hover{border-color:#cfd3ea}
.t1{--tint:#ece9ff}.t2{--tint:#dcfce7}.t3{--tint:#fff4cc}.t4{--tint:#ffe4e6}.t5{--tint:#dff3ff}.t6{--tint:#f3e8ff}

/* Quick actions */
.quick{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));margin-bottom:16px}
.quick a{display:flex;gap:10px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 14px;text-decoration:none;color:var(--ink);font-weight:700;font-size:.92rem;box-shadow:var(--shadow)}
.quick a span{font-size:20px}
.quick a:hover{border-color:var(--brand)}

/* Bar chart */
.bars{display:flex;gap:8px;align-items:flex-end;height:170px;padding-top:10px}
.bars .bar{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;height:100%;justify-content:flex-end}
.bars .bar i{display:block;width:100%;max-width:42px;border-radius:8px 8px 3px 3px;background:linear-gradient(180deg,var(--brand-2),var(--brand));min-height:4px}
.bars .bar b{font-size:.78rem}
.bars .bar span{font-size:.72rem;color:var(--muted)}
.hbar{display:flex;align-items:center;gap:10px;margin:8px 0;font-size:.9rem}
.hbar>span:first-child{width:38%;min-width:110px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hbar .track{flex:1;height:10px;border-radius:99px;background:#eef0f7;overflow:hidden}
.hbar .track i{display:block;height:100%;border-radius:99px;background:var(--c,var(--brand))}
.hbar b{width:40px;text-align:right}

/* list rows */
.list{display:flex;flex-direction:column}
.li{display:flex;gap:12px;align-items:center;padding:10px 0;border-bottom:1px solid var(--line)}
.li:last-child{border-bottom:0}
.li .grow{flex:1;min-width:0}
.li .grow b{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.li-ic{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:#f1f2fa;font-size:18px;flex:none;overflow:hidden}
.li-ic img{width:100%;height:100%;object-fit:cover}
.empty{text-align:center;padding:28px 10px;color:var(--muted)}
.empty-ic{font-size:44px;margin-bottom:6px}
.empty b{display:block;color:var(--ink);font-size:1.05rem}

/* forms */
.form label{display:block;margin-bottom:12px;font-weight:700;font-size:.88rem}
.form .cols{display:grid;gap:0 14px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.form .hint{font-weight:500;color:var(--muted);font-size:.8rem;display:block;margin-top:3px}
input,select,textarea{width:100%;padding:11px 13px;border:1.5px solid var(--line);border-radius:12px;font:inherit;background:#fff;margin-top:5px;color:var(--ink);transition:border .15s,box-shadow .15s}
input:focus,select:focus,textarea:focus{outline:0;border-color:var(--brand);box-shadow:0 0 0 4px color-mix(in srgb,var(--brand) 15%,transparent)}
input[type=checkbox],input[type=radio]{width:auto;margin-right:6px;accent-color:var(--brand)}
input[type=color]{padding:4px;height:44px}
textarea{min-height:90px}
.inline-form{display:inline}
.check{display:flex!important;align-items:center;gap:8px;font-weight:600!important}
.checks{display:flex;gap:8px;flex-wrap:wrap;margin-top:6px}
.checks label{display:flex;align-items:center;gap:4px;border:1.5px solid var(--line);border-radius:99px;padding:6px 12px;margin:0;font-weight:600;cursor:pointer;background:#fff}
.checks input{margin:0}
.pw{position:relative;display:block}
.pw-eye{position:absolute;right:8px;top:50%;transform:translateY(-35%);border:0;background:none;cursor:pointer;font-size:1rem}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1.5px solid var(--line);background:#fff;color:var(--ink);padding:9px 15px;border-radius:12px;cursor:pointer;text-decoration:none;font:inherit;font-weight:700;white-space:nowrap;transition:transform .08s,filter .15s}
.btn:hover{filter:brightness(.97)}.btn:active{transform:scale(.98)}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 6px 16px color-mix(in srgb,var(--brand) 30%,transparent)}
.btn.yellow{background:var(--yellow);border-color:var(--yellow);color:#2b2200}
.btn.ghost{background:transparent}
.btn.danger{color:var(--err);border-color:#f3c4c4}
.btn.wa{background:var(--wa);border-color:var(--wa);color:#fff}
.btn.sm{padding:5px 11px;font-size:.84rem;border-radius:10px}
.btn.big{padding:14px 20px;font-size:1.05rem;width:100%}
.btn[disabled]{opacity:.5;pointer-events:none}

/* tables */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;background:#fff}
th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle;font-size:.92rem}
th{background:#f8f9fd;font-weight:700;color:var(--muted);font-size:.74rem;text-transform:uppercase;letter-spacing:.05em}
tr:hover td{background:#fbfbff}
.card.table-wrap{padding:6px}
.card.table-wrap>p{padding:6px 10px}

.badge{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:99px;font-size:.75rem;font-weight:700;background:#eef0f7;color:var(--muted)}
.badge.ok{background:#dcfce7;color:#166534}.badge.err{background:#fee2e2;color:#991b1b}.badge.warn{background:#fef3c7;color:#92400e}.badge.brand{background:var(--brand);color:#fff}
.badge.live{background:#ef4444;color:#fff;animation:pulse 1.4s infinite}
@keyframes pulse{50%{opacity:.6}}
.alert{padding:12px 14px;border-radius:12px;margin-bottom:14px;background:#dcfce7;color:#14532d;border:1px solid #bbf7d0;font-weight:600}
.alert.err{background:#fee2e2;color:#7f1d1d;border-color:#fecaca}
.alert.warn{background:#fef3c7;color:#78350f;border-color:#fde68a}
.alert.info{background:#e0f2fe;color:#0c4a6e;border-color:#bae6fd}

/* pills / tabs */
.tabs{display:flex;gap:6px;margin:0 0 14px;flex-wrap:wrap}
.tabs a,.tabs button{padding:8px 14px;border-radius:99px;background:#fff;border:1.5px solid var(--line);text-decoration:none;color:var(--ink);font-weight:700;font-size:.88rem;cursor:pointer;font-family:inherit}
.tabs a.on,.tabs button.on{background:var(--brand);color:#fff;border-color:var(--brand)}

/* steps (how it works) */
.steps{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));counter-reset:st}
.steps div{background:#f8f9fd;border-radius:14px;padding:14px 14px 14px 48px;position:relative;font-size:.9rem}
.steps div::before{counter-increment:st;content:counter(st);position:absolute;left:14px;top:14px;width:24px;height:24px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:800;font-size:.8rem}

/* dropzone + preview */
.drop{border:2.5px dashed #c9cde6;border-radius:20px;padding:34px 16px;text-align:center;background:#fafbff;cursor:pointer;transition:.15s}
.drop.over,.drop:hover{border-color:var(--brand);background:#f3f2ff}
.drop .big-ic{font-size:46px}
.drop b{display:block;font-size:1.1rem;margin:6px 0 2px}
.preview td input{margin:0;padding:6px 8px;border-radius:8px}
.preview td{font-size:.86rem}
.qtext{font-family:ui-monospace,Menlo,Consolas,monospace;white-space:pre-wrap}

/* level cards (admin) */
.lv-grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.lv-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px;box-shadow:var(--shadow);border-top:5px solid var(--c,var(--brand));display:flex;flex-direction:column;gap:6px}
.lv-card .lv-top{display:flex;gap:10px;align-items:center}
.lv-card .lv-ic{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;font-size:24px;background:color-mix(in srgb,var(--c) 15%,#fff)}
.lv-card h3{margin:0;font-size:1.02rem}
.lv-card .tags{display:flex;gap:5px;flex-wrap:wrap}
.lv-card .tags span{font-size:.72rem;background:#f1f2fa;border-radius:99px;padding:2px 8px;font-weight:700;color:#4b4f70}
.lv-card .acts{display:flex;gap:6px;margin-top:auto;padding-top:8px}

/* ---------- AUTH PAGES ---------- */
body.auth{min-height:100vh;display:grid;place-items:center;background:linear-gradient(140deg,#1a1857 0%,var(--brand) 55%,#5b3df5 100%);padding:20px;position:relative;overflow-x:hidden}
.auth-teacher{background:linear-gradient(140deg,#052e2b,#0f766e 55%,#14b8a6)!important}
.auth-admin{background:linear-gradient(140deg,#0b0b1f,#1e1b4b 55%,#312e81)!important}
.auth-parent{background:linear-gradient(140deg,#3b0764,#7e22ce 60%,#c026d3)!important}
.auth-bg i{position:fixed;border-radius:50%;filter:blur(2px);opacity:.25;background:var(--yellow)}
.auth-bg i:nth-child(1){width:320px;height:320px;right:-80px;top:-80px}
.auth-bg i:nth-child(2){width:180px;height:180px;left:-50px;bottom:10%;background:#fff;opacity:.1}
.auth-bg i:nth-child(3){width:90px;height:90px;left:20%;top:12%;background:#fff;opacity:.12}
.auth-wrap{width:100%;max-width:430px;position:relative;z-index:1}
.auth-logo{display:flex;justify-content:center;margin-bottom:14px}
.auth-logo img{height:76px;background:#fff;border-radius:18px;padding:6px 10px;box-shadow:0 10px 30px rgba(0,0,0,.25)}
.auth-logo span{font-size:54px}
.auth-card{background:#fff;border-radius:26px;padding:28px 24px;box-shadow:0 30px 60px rgba(0,0,0,.3);text-align:center}
.auth-card h1{margin:.2em 0 .1em;font-size:1.6rem}
.auth-card .form{text-align:left;margin-top:18px}
.auth-badge{width:66px;height:66px;margin:0 auto;border-radius:20px;background:#f1f0ff;display:grid;place-items:center;font-size:34px}
.auth-switch{margin:16px 0 0;color:var(--muted)}
.pin{letter-spacing:.5em;font-size:1.3rem;text-align:center}
.kidform input{font-size:1.2rem;padding:14px;border-radius:16px}
.kid-card h1{font-family:var(--kid);font-size:2rem}
.install-btn{width:100%;margin-top:10px}
.auth-mascot{display:flex;justify-content:center;margin-bottom:6px}
.bead-anim{display:flex;gap:6px;padding:12px 16px;background:#8b5a2b;border-radius:16px;box-shadow:inset 0 0 0 4px #6d4320}
.bead-anim i{width:26px;height:18px;border-radius:50%;background:radial-gradient(ellipse at 35% 30%,#ffd28a,#f59e0b 50%,#b45309);animation:bead 1.6s ease-in-out infinite}
.bead-anim i:nth-child(2){animation-delay:.15s}.bead-anim i:nth-child(3){animation-delay:.3s;background:radial-gradient(ellipse at 35% 30%,#ff9db5,#e11d48 50%,#881337)}.bead-anim i:nth-child(4){animation-delay:.45s}.bead-anim i:nth-child(5){animation-delay:.6s}
@keyframes bead{50%{transform:translateY(-10px)}}

/* ---------- STUDENT APP ---------- */
body.kid{background:#f3f1ff;font-size:16px;padding-bottom:calc(78px + var(--safe-b))}
body.kid h1,body.kid h2,body.kid .kid-font{font-family:var(--kid);letter-spacing:0}
.kid .wrap{max-width:760px;padding:14px 14px 20px}
.kid .card{border-radius:22px;border:0;box-shadow:0 6px 20px rgba(60,40,180,.07)}
.app-top{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:10px;padding:calc(10px + var(--safe-t)) 14px 10px;background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(0,0,0,.12)}
.app-av{width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.2);display:grid;place-items:center;font-size:22px;text-decoration:none;overflow:hidden;flex:none}
.app-av img{width:100%;height:100%;object-fit:cover}
.app-back{width:40px;height:40px;border-radius:12px;background:rgba(255,255,255,.15);color:#fff;text-decoration:none;display:grid;place-items:center;font-size:30px;line-height:1;flex:none}
.app-title{font-family:var(--kid);font-weight:800;font-size:1.25rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chip-coin{background:#fff7d6;color:#7a5600;border-radius:99px;padding:5px 12px;font-weight:800;font-size:.95rem;white-space:nowrap}
.app-icon{background:rgba(255,255,255,.15);border:0;color:#fff;width:38px;height:38px;border-radius:12px;font-size:17px;cursor:pointer;flex:none}
.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:40;display:flex;background:#fff;border-top:1px solid #ebe8fb;padding:6px 6px calc(6px + var(--safe-b));box-shadow:0 -6px 20px rgba(40,30,120,.08)}
.tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:1px;text-decoration:none;color:#8a8db0;font-weight:800;font-size:.72rem;padding:4px 0;border-radius:14px}
.tabbar a span{font-size:22px;line-height:1.1;filter:grayscale(.6);opacity:.8}
.tabbar a.on{color:var(--brand);background:#f1efff}
.tabbar a.on span{filter:none;opacity:1;transform:translateY(-1px)}
@media(min-width:900px){.tabbar{left:50%;right:auto;transform:translateX(-50%);width:520px;bottom:14px;border-radius:22px;border:1px solid #ebe8fb;padding:6px}}

.hero-kid{position:relative;border-radius:26px;padding:20px;color:#fff;background:linear-gradient(135deg,var(--brand),#6d5cff 70%,#a78bfa);overflow:hidden;margin-bottom:14px}
.hero-kid::after{content:"";position:absolute;right:-50px;top:-50px;width:180px;height:180px;border-radius:50%;background:rgba(255,255,255,.12)}
.hero-kid .lvl{display:inline-flex;gap:6px;align-items:center;background:rgba(255,255,255,.18);border-radius:99px;padding:4px 12px;font-weight:800;font-size:.85rem}
.hero-kid h2{margin:8px 0 2px;font-size:1.5rem}
.hero-kid .stats{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}
.hero-kid .stats div{background:rgba(255,255,255,.15);border-radius:14px;padding:8px 12px;min-width:84px}
.hero-kid .stats b{display:block;font-size:1.25rem;font-family:var(--kid)}
.hero-kid .stats span{font-size:.75rem;opacity:.85}
.ring{--p:0;width:86px;height:86px;border-radius:50%;background:conic-gradient(var(--yellow) calc(var(--p)*1%),rgba(255,255,255,.2) 0);display:grid;place-items:center;flex:none;position:relative;z-index:1}
.ring>div{width:68px;height:68px;border-radius:50%;background:var(--brand);display:grid;place-items:center;text-align:center;line-height:1.05;font-weight:800;font-size:.75rem}
.ring>div b{font-size:1.25rem;font-family:var(--kid)}

.sec-title{display:flex;align-items:center;gap:8px;margin:18px 2px 10px}
.sec-title h2{margin:0;font-size:1.25rem}
.sec-title a{margin-left:auto;font-weight:800;font-size:.85rem;text-decoration:none}

.live-banner{display:flex;gap:12px;align-items:center;border-radius:20px;padding:14px;background:linear-gradient(90deg,#ef4444,#f97316);color:#fff;text-decoration:none;margin-bottom:14px;box-shadow:0 8px 20px rgba(239,68,68,.3)}
.live-banner .lb-ic{font-size:30px}
.live-banner b{display:block;font-family:var(--kid);font-size:1.1rem}
.live-banner .go{margin-left:auto;background:#fff;color:#ef4444;border-radius:12px;padding:8px 12px;font-weight:800;white-space:nowrap}

.tiles{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
.kid .tiles{grid-template-columns:repeat(2,1fr)}
@media(min-width:560px){.kid .tiles{grid-template-columns:repeat(3,1fr)}}
.tile{position:relative;display:flex;flex-direction:column;align-items:flex-start;justify-content:flex-end;gap:2px;min-height:118px;padding:14px;border-radius:22px;background:#fff;text-decoration:none;color:var(--ink);font-weight:800;font-size:1.02rem;box-shadow:0 6px 18px rgba(0,0,0,.06);transition:transform .12s;border:0;cursor:pointer;font-family:var(--kid);overflow:hidden;text-align:left}
.tile:active{transform:scale(.97)}
.tile .ic{font-size:40px;line-height:1;position:absolute;top:12px;right:12px}
.tile small{font-family:var(--font);font-weight:600;font-size:.72rem;opacity:.75}
.tile.c1{background:linear-gradient(150deg,#ffe1e1,#ffc4c4)}.tile.c2{background:linear-gradient(150deg,#ddf3ff,#b9e5ff)}.tile.c3{background:linear-gradient(150deg,#e3fbdf,#c2f0b8)}
.tile.c4{background:linear-gradient(150deg,#fff3d6,#ffe19c)}.tile.c5{background:linear-gradient(150deg,#efe5ff,#d9c6ff)}.tile.c6{background:linear-gradient(150deg,#ffe5f4,#ffc6e6)}
.tile.locked{opacity:.5;pointer-events:none}
.tile .new{position:absolute;top:10px;left:10px;background:#ef4444;color:#fff;font-size:.65rem;border-radius:99px;padding:1px 7px;font-family:var(--font)}

/* level path */
.path{display:flex;gap:10px;overflow-x:auto;padding:6px 2px 12px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
.path::-webkit-scrollbar{height:0}
.node{scroll-snap-align:center;flex:none;width:96px;text-align:center;text-decoration:none;color:var(--ink)}
.node .dot{width:72px;height:72px;margin:0 auto 6px;border-radius:50%;display:grid;place-items:center;font-size:30px;background:#fff;border:4px solid #e3e0f7;box-shadow:0 6px 0 #e3e0f7;position:relative}
.node.done .dot{background:color-mix(in srgb,var(--c) 18%,#fff);border-color:var(--c);box-shadow:0 6px 0 color-mix(in srgb,var(--c) 70%,#000)}
.node.now .dot{background:var(--c);border-color:#fff;box-shadow:0 0 0 4px var(--c),0 8px 18px color-mix(in srgb,var(--c) 50%,transparent);animation:bob 1.8s ease-in-out infinite}
.node.lock .dot{filter:grayscale(1);opacity:.55}
.node .dot em{position:absolute;bottom:-6px;right:-4px;font-style:normal;font-size:.7rem;background:#fff;border-radius:99px;padding:0 6px;font-weight:800;box-shadow:0 2px 6px rgba(0,0,0,.15)}
.node b{display:block;font-size:.72rem;line-height:1.15;font-weight:800}
@keyframes bob{50%{transform:translateY(-4px)}}

.progress{height:12px;background:#e9e7f7;border-radius:99px;overflow:hidden}
.progress>i{display:block;height:100%;background:linear-gradient(90deg,#22c55e,#84cc16);border-radius:99px;transition:width .4s}
.coins{display:inline-flex;align-items:center;gap:6px;background:#fff7d6;color:#7a5600;padding:6px 14px;border-radius:99px;font-weight:800}
.badges{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.bdg{background:#fff;border-radius:18px;padding:12px 6px;text-align:center;font-weight:800;font-size:.78rem;box-shadow:0 4px 12px rgba(0,0,0,.05)}
.bdg span{display:block;font-size:30px}
.bdg.off{opacity:.35;filter:grayscale(1)}

/* leaderboard */
.podium{display:flex;align-items:flex-end;justify-content:center;gap:10px;margin:10px 0 16px}
.podium .p{flex:1;max-width:130px;text-align:center}
.podium .p .pa{width:58px;height:58px;margin:0 auto 4px;border-radius:50%;background:#fff;display:grid;place-items:center;font-size:28px;border:3px solid var(--c);overflow:hidden}
.podium .p .pa img{width:100%;height:100%;object-fit:cover}
.podium .p b{display:block;font-size:.85rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.podium .p .blk{border-radius:14px 14px 0 0;background:var(--c);color:#fff;font-family:var(--kid);font-size:1.6rem;font-weight:800;padding-top:6px;margin-top:6px}
.podium .p1{--c:#f59e0b}.podium .p1 .blk{height:96px}.podium .p2{--c:#94a3b8}.podium .p2 .blk{height:70px}.podium .p3{--c:#c2763a}.podium .p3 .blk{height:54px}
.rank-row{display:flex;align-items:center;gap:10px;background:#fff;border-radius:16px;padding:10px 12px;margin-bottom:8px;box-shadow:0 3px 10px rgba(0,0,0,.04)}
.rank-row .rn{width:30px;font-weight:800;color:var(--muted);text-align:center}
.rank-row.me{outline:3px solid var(--yellow)}
.rank-row .pts{margin-left:auto;font-weight:800}

/* Virtual abacus (soroban) */
.abacus-wrap{display:flex;flex-direction:column;align-items:center;gap:10px}
.abacus-value{font-family:var(--kid);font-size:2.6rem;font-weight:800;letter-spacing:.06em;font-variant-numeric:tabular-nums;color:var(--brand);min-height:1.2em}
.abacus{position:relative;background:linear-gradient(180deg,#9a6534,#7a4a22);border-radius:18px;padding:14px 12px;display:flex;gap:4px;box-shadow:inset 0 0 0 6px #5e3816,0 10px 22px rgba(0,0,0,.2);touch-action:none;user-select:none;-webkit-user-select:none;max-width:100%;overflow-x:auto}
.rod{position:relative;width:var(--rw,46px);flex:none;display:flex;flex-direction:column;align-items:center}
.rod::before{content:"";position:absolute;top:0;bottom:0;left:50%;width:4px;margin-left:-2px;background:#e3d1b5;border-radius:2px}
.rod .heaven,.rod .earth{position:relative;display:flex;flex-direction:column;align-items:center;width:100%}
.rod .heaven{height:calc(var(--bh,26px)*2 + 6px);justify-content:flex-start}
.rod .earth{height:calc(var(--bh,26px)*5 + 8px);justify-content:flex-end}
.beam{position:relative;height:10px;width:100%;background:#2b1a0c;margin:2px 0;z-index:1}
.rod:nth-child(3n+1) .beam::after{content:"";position:absolute;left:50%;top:2px;width:6px;height:6px;margin-left:-3px;border-radius:50%;background:#fff}
.bead{position:relative;z-index:2;width:var(--bw,42px);height:var(--bh,26px);cursor:pointer;transition:transform .12s ease;background:radial-gradient(ellipse at 35% 30%,#ffd28a 0,#f59e0b 45%,#b45309 100%);box-shadow:0 2px 2px rgba(0,0,0,.35);clip-path:polygon(0 50%,22% 0,78% 0,100% 50%,78% 100%,22% 100%)}
.rod .heaven .bead{background:radial-gradient(ellipse at 35% 30%,#ff9db5 0,#e11d48 50%,#881337 100%)}
.bead.on.h{transform:translateY(calc(var(--bh,26px) + 6px))}
.earth .bead.on{transform:translateY(calc(-1 * var(--bh,26px) - 8px))}
.abacus.readonly .bead{cursor:default}
.rod-val{color:#fde68a;font-weight:700;font-size:.8rem;margin-top:4px;height:1em}
.abacus.small{--rw:34px;--bw:30px;--bh:20px}
.abacus.big{--rw:58px;--bw:54px;--bh:32px}
.abacus-tools{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}

/* Games */
.game-stage{position:relative;min-height:380px;border-radius:26px;background:#fff;overflow:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;text-align:center;box-shadow:0 6px 20px rgba(60,40,180,.07)}
.flash-num{font-family:var(--kid);font-size:min(30vw,9rem);font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums;min-height:1.2em;line-height:1.1}
.big-q{font-family:var(--kid);font-size:2.6rem;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:.04em}
.answer-input{font-family:var(--kid);font-size:2rem;text-align:center;max-width:240px;padding:12px;border-radius:18px;border:3px solid var(--brand)}
.feedback{font-family:var(--kid);font-size:1.4rem;font-weight:800;min-height:1.6em}
.feedback.good{color:var(--ok)}.feedback.bad{color:var(--err)}
.balloons{position:relative;width:100%;height:360px}
.balloon{position:absolute;bottom:-130px;width:92px;height:112px;border-radius:50% 50% 48% 48%;display:grid;place-items:center;color:#fff;font-weight:900;font-size:1.5rem;cursor:pointer;border:0;box-shadow:inset -8px -10px 0 rgba(0,0,0,.12);font-family:var(--kid)}
.balloon::after{content:"";position:absolute;bottom:-28px;left:50%;width:2px;height:28px;background:#999}
.balloon.pop{animation:pop .25s forwards}
@keyframes pop{to{transform:scale(1.6);opacity:0}}
.hud{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:10px}
.hud span{background:#fff;border-radius:99px;padding:6px 14px;font-weight:800;box-shadow:0 2px 8px rgba(0,0,0,.06)}
.stars{font-size:2.6rem;letter-spacing:.1em}
.choice-row{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.choice-row .btn{font-size:1.4rem;padding:14px 24px;border-radius:16px;font-family:var(--kid);min-width:90px}
.numpad{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;width:100%;max-width:300px;margin-top:10px}
.numpad button{font-family:var(--kid);font-size:1.5rem;font-weight:800;padding:10px 0;border-radius:16px;border:0;background:#f1efff;color:var(--ink);cursor:pointer;box-shadow:0 3px 0 #dcd6ff}
.numpad button:active{transform:translateY(2px);box-shadow:none}
.numpad .ok{background:var(--ok);color:#fff;box-shadow:0 3px 0 #0f7a35}
.numpad .del{background:#ffe4e6;box-shadow:0 3px 0 #fecdd3}
.confetti{position:fixed;inset:0;pointer-events:none;z-index:99;overflow:hidden}
.confetti i{position:absolute;top:-20px;width:10px;height:14px;border-radius:2px;animation:fall 2.4s linear forwards}
@keyframes fall{to{transform:translateY(110vh) rotate(720deg)}}

/* Test runner */
.test-top{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.timer{font-family:var(--kid);font-weight:800;font-size:1.3rem;background:#fff;border-radius:14px;padding:6px 14px;box-shadow:0 3px 10px rgba(0,0,0,.06);font-variant-numeric:tabular-nums}
.timer.low{background:#fee2e2;color:#b91c1c;animation:pulse 1s infinite}
.qcard{background:#fff;border-radius:26px;padding:22px 18px;box-shadow:0 6px 20px rgba(60,40,180,.08);text-align:center}
.qno{font-weight:800;color:var(--muted);font-size:.85rem}
.opts{display:grid;gap:10px;margin-top:14px}
.opt{display:flex;gap:10px;align-items:center;text-align:left;padding:14px;border-radius:16px;border:2px solid var(--line);background:#fff;font:inherit;font-weight:700;font-size:1.05rem;cursor:pointer}
.opt.sel{border-color:var(--brand);background:#f1efff}
.opt i{font-style:normal;width:30px;height:30px;border-radius:10px;background:#f1f2fa;display:grid;place-items:center;font-weight:800;flex:none}
.opt.sel i{background:var(--brand);color:#fff}
.palette{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;margin:14px 0}
.palette button{width:36px;height:36px;border-radius:10px;border:2px solid var(--line);background:#fff;font-weight:800;cursor:pointer;font-family:inherit}
.palette button.ans{background:#dcfce7;border-color:#86efac}
.palette button.cur{border-color:var(--brand);box-shadow:0 0 0 2px var(--brand)}
.result-hero{text-align:center;background:linear-gradient(135deg,var(--brand),#6d5cff);color:#fff;border-radius:26px;padding:24px 16px}
.result-hero .score{font-family:var(--kid);font-size:3.2rem;font-weight:800;line-height:1}
.test-card{display:flex;gap:12px;align-items:center;background:#fff;border-radius:20px;padding:14px;margin-bottom:10px;box-shadow:0 4px 14px rgba(0,0,0,.05);text-decoration:none;color:var(--ink)}
.test-card .tc-ic{width:50px;height:50px;border-radius:16px;display:grid;place-items:center;font-size:24px;background:#f1efff;flex:none}
.test-card .grow{flex:1;min-width:0}
.test-card b{display:block;font-family:var(--kid);font-size:1.05rem;line-height:1.2}
.countdown{font-variant-numeric:tabular-nums}

/* install sheet */
.install-sheet{position:fixed;left:12px;right:12px;bottom:calc(84px + var(--safe-b));z-index:60;background:#14162b;color:#fff;border-radius:20px;padding:14px;display:flex;gap:12px;align-items:center;box-shadow:0 14px 40px rgba(0,0,0,.35);max-width:520px;margin:0 auto}
.install-sheet img{width:46px;height:46px;border-radius:12px}
.install-sheet b{display:block}
.install-sheet .x{background:none;border:0;color:#aaa;font-size:20px;cursor:pointer}
body:not(.kid) .install-sheet{bottom:16px}

/* Certificate print */
.cert{width:1000px;max-width:100%;margin:20px auto;background:#fff;border:14px solid var(--brand);outline:3px solid #d4af37;outline-offset:-26px;padding:56px 60px;text-align:center;position:relative;aspect-ratio:1.414/1}
.cert .c-logo{max-height:80px}
.cert h1{font-size:2.6rem;letter-spacing:.08em;margin:.2em 0;color:var(--brand);font-family:Georgia,serif}
.cert .c-name{font-size:2.2rem;font-family:Georgia,serif;font-style:italic;border-bottom:2px solid #d4af37;display:inline-block;padding:0 30px;margin:.3em 0}
.cert .c-foot{display:flex;justify-content:space-between;align-items:flex-end;position:absolute;left:70px;right:70px;bottom:60px;font-size:.9rem}
.cert .c-sign img{max-height:50px}
.receipt{max-width:600px;margin:20px auto;background:#fff;border:1px solid var(--line);border-radius:12px;padding:26px}
@media print{.topbar,.side,.staff-top,.app-top,.tabbar,.install-sheet,.no-print,.alert{display:none!important}body,body.staff,body.kid{background:#fff;padding:0}.wrap{padding:0;max-width:none}.cert{margin:0;box-shadow:none}@page{size:A4 landscape;margin:8mm}}
.rank-row .grow b,.rank-row .grow>span{display:block}
/* ---- Game mode: full-screen, fits every phone (v2.2) ---- */
body.kid.game{padding-bottom:calc(62px + var(--safe-b))}
body.game .wrap{padding:8px 10px calc(10px + var(--safe-b))}
body.game .app-top{padding-top:calc(6px + var(--safe-t));padding-bottom:6px}
body.game .app-back,body.game .app-icon{width:36px;height:36px}
body.game .app-title{font-size:1.1rem}
body.game .hud{margin-bottom:6px}
body.game .hud span{padding:3px 12px;font-size:.92rem}
body.game .game-stage{min-height:0;justify-content:flex-start;padding:12px 10px;gap:2px;border-radius:22px}
body.game .game-stage #intro{margin:auto 0}
body.game .big-q{font-size:clamp(1.6rem,5.2vh,2.6rem)}
body.game .flash-num{font-size:clamp(3.2rem,13vh,8rem)}
body.game .answer-input{font-size:clamp(1.4rem,4vh,2rem);padding:clamp(4px,1vh,12px);max-width:220px;border-radius:14px}
body.game .feedback{font-size:clamp(1rem,2.6vh,1.4rem);min-height:1.3em}
body.game .numpad{gap:clamp(5px,.9vh,8px);max-width:min(300px,92vw);margin-top:4px}
body.game .numpad button{font-size:clamp(1.15rem,3vh,1.5rem);padding:clamp(5px,1.35vh,11px) 0;border-radius:14px}
body.game .stars{font-size:2rem}
body.game .balloons{height:clamp(220px,45vh,360px)}
body.game .choice-row .btn{font-size:1.2rem;padding:10px 18px;min-width:76px}
body.game .game-stage .ic-big{font-size:clamp(2.4rem,8vh,4.5rem);line-height:1}
body.game .qcard{padding:12px 10px}
body.game .test-top{margin-bottom:6px}
body.game .palette{margin:8px 0}
body.game .palette button{width:32px;height:32px}
@media (max-height:760px){
 body.game .abacus{--rw:30px;--bw:27px;--bh:17px;padding:8px 8px}
 body.game .abacus .rod-val{display:none}
 body.game .big-q{line-height:1.08!important}
}
@media (max-height:640px){
 body.game .numpad button{padding:4px 0}
 body.game .abacus{--rw:26px;--bw:23px;--bh:14px}
}
.q-row{display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap;margin:4px 0;width:100%}
.q-row .q-sum{flex:0 1 auto}
.q-row .q-ab{flex:0 0 auto;max-width:100%}
.q-row .q-ab[hidden]{display:none}
.ab-toggle{flex-basis:100%;max-width:200px}
body.game .q-row .abacus{--rw:28px;--bw:25px;--bh:16px;padding:8px 6px;border-radius:12px}
.ans-row{display:flex;gap:8px;align-items:center;justify-content:center;width:100%}
.ans-row .answer-input{flex:1;min-width:0}
.ans-row .hint{flex:none;padding:8px 10px}
body.game .game-stage{min-height:calc(100dvh - 200px)}
body.game .game-stage>div:first-child.muted{font-size:.85rem}

@media (max-height:700px){
 body.game .qcard{padding:8px 8px}
 body.game .qcard .numpad button{padding:3px 0}
 body.game .qcard .big-q{font-size:1.6rem}
 body.game .qcard .answer-input{padding:4px}
 body.game #prevBtn,body.game #nextBtn{padding:7px 14px}
 body.game #prevBtn{margin-top:-4px}
 body.game .qcard + .row{margin-top:6px!important}
}

/* game mode keeps bottom menu, but slimmer */
body.game .tabbar{padding:3px 4px calc(3px + var(--safe-b))}
body.game .tabbar a{font-size:.66rem;padding:2px 0}
body.game .tabbar a span{font-size:19px}
/* auto-fit levels (added by JS when content is taller than the screen) */
body.fit1 .hud{display:none}
body.fit1 .game-stage,body.fit1 .qcard{padding:8px 8px}
body.fit1 .game-stage .muted{font-size:.8rem}
body.fit1 .big-q{font-size:1.5rem!important;line-height:1.08!important}
body.fit1 .flash-num{font-size:3.4rem}
body.fit1 .game-stage .ic-big{font-size:2.4rem}
body.fit1 .answer-input{font-size:1.3rem;padding:3px 6px}
body.fit1 .feedback{font-size:1rem;min-height:1.1em}
body.fit1 .numpad{gap:5px}
body.fit1 .numpad button{padding:5px 0;font-size:1.2rem}
body.fit1 .abacus{--rw:26px;--bw:23px;--bh:14px;padding:6px}
body.fit1 .abacus .rod-val{display:none}
body.fit1 .opts{gap:6px;margin-top:6px}body.fit1 .opt{padding:8px 10px;font-size:.95rem}
body.fit1 .choice-row .btn{padding:8px 14px;font-size:1.1rem}
body.fit2 .app-top{padding-top:calc(4px + var(--safe-t));padding-bottom:4px}
body.fit2 .app-back,body.fit2 .app-icon,body.fit2 .app-av{width:32px;height:32px}
body.fit2 .chip-coin{padding:2px 9px;font-size:.85rem}
body.fit2 .big-q{font-size:1.25rem!important}
body.fit2 .flash-num{font-size:2.8rem}
body.fit2 .numpad button{padding:2px 0;font-size:1.1rem;border-radius:10px}
body.fit2 .answer-input{font-size:1.15rem;padding:1px 6px}
body.fit2 .game-stage .ic-big{font-size:1.8rem}
body.fit2 .test-top{margin-bottom:4px}body.fit2 .timer{padding:2px 10px;font-size:1.05rem}
body.fit2 #prevBtn,body.fit2 #nextBtn{padding:5px 12px}