:root{--ink:#17324d;--muted:#66788a;--teal:#0f766e;--teal2:#18aa9d;--mint:#eaf8f5;--orange:#f59e0b;--red:#d94848;--paper:#fff;--line:#dce8e9;--wash:#f4f9f9;--shadow:0 18px 45px rgba(18,72,74,.09)}
*{box-sizing:border-box}html{background:#f3f8f8}body{margin:0;color:var(--ink);font-family:Inter,ui-sans-serif,"Segoe UI",Arial,sans-serif;background:#f3f8f8}button,input,select{font:inherit}button,a{transition:.18s ease}button{cursor:pointer}button:disabled{cursor:wait;opacity:.62}button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid rgba(20,184,166,.28);outline-offset:2px}.brand{display:flex;align-items:center;gap:11px}.brand-mark{display:grid;place-items:center;width:46px;height:46px;border-radius:14px;background:linear-gradient(145deg,#115e59,#18aa9d);color:#fff;font-weight:950;font-size:.85rem;letter-spacing:-.05em;box-shadow:0 9px 22px rgba(15,118,110,.22)}.brand small,.header-user small{display:block;color:var(--muted);font-size:.72rem;margin-top:2px}.eyebrow{margin:0 0 8px;color:var(--teal);font-size:.7rem;font-weight:900;letter-spacing:.14em;text-transform:uppercase}.primary-btn{border:0;border-radius:13px;background:linear-gradient(135deg,var(--teal),var(--teal2));color:#fff;padding:14px 18px;font-weight:850;box-shadow:0 9px 18px rgba(15,118,110,.17)}.primary-btn:hover{transform:translateY(-1px);box-shadow:0 12px 22px rgba(15,118,110,.22)}.primary-btn.compact{padding:12px 18px}.ghost-btn{border:1px solid var(--line);border-radius:11px;background:#fff;color:var(--ink);padding:9px 13px;font-weight:750}.form-error{border:1px solid #f4caca;background:#fff2f2;color:#a93232;border-radius:11px;padding:11px 13px;font-size:.83rem;font-weight:700}.spinner{width:28px;height:28px;border:3px solid #cce4e2;border-top-color:var(--teal);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}

/* Login */
.login-page{display:grid;grid-template-columns:1.08fr .92fr;min-height:100vh}.login-story{position:relative;overflow:hidden;display:flex;flex-direction:column;justify-content:space-between;padding:42px clamp(36px,6vw,88px);color:#fff;background:radial-gradient(circle at 80% 10%,rgba(65,222,202,.25),transparent 30%),linear-gradient(145deg,#0c554f,#0c7770 58%,#109689)}.login-story:after{content:"×  ÷  ½";position:absolute;right:-40px;bottom:100px;color:rgba(255,255,255,.055);font:900 clamp(7rem,16vw,14rem)/.8 Georgia,serif;transform:rotate(-8deg);white-space:nowrap}.login-story .brand-mark{background:#fff;color:var(--teal);box-shadow:none}.login-story .brand{font-weight:900}.story-copy{position:relative;z-index:1;max-width:650px}.story-copy .eyebrow{color:#8df0e4}.story-copy h1{font-size:clamp(3rem,6vw,5.4rem);line-height:.98;letter-spacing:-.055em;margin:0 0 24px}.story-copy h1 em{font-family:Georgia,serif;font-weight:500;color:#a5f3e9}.story-copy>p{max-width:570px;color:#d8f4f0;font-size:1.02rem;line-height:1.8}.feature-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:35px}.feature-row span{border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.08);padding:11px 13px;border-radius:12px;font-size:.78rem;font-weight:750}.feature-row b{color:#8df0e4;margin-right:5px}.login-foot{font-size:.76rem;color:#bce6e1}.login-panel{display:grid;place-items:center;padding:30px;background:radial-gradient(circle at 80% 20%,rgba(20,184,166,.08),transparent 22rem),#f7fbfb}.login-card{width:min(430px,100%);display:grid;gap:18px;background:#fff;border:1px solid var(--line);border-radius:26px;padding:clamp(24px,4vw,42px);box-shadow:var(--shadow)}.login-card h2{margin:0 0 8px;font-size:1.8rem;letter-spacing:-.035em}.login-card p{margin:0;color:var(--muted);line-height:1.6}.login-card label,.form-grid label{display:grid;gap:7px;color:#3d5366;font-size:.78rem;font-weight:800}.login-card input,.form-grid input,.form-grid select,.answer-form input{width:100%;border:1.5px solid var(--line);border-radius:12px;background:#fbfdfd;color:var(--ink);padding:13px 14px;outline:none}.login-card input:focus,.form-grid input:focus,.form-grid select:focus,.answer-form input:focus{border-color:var(--teal2);box-shadow:0 0 0 4px rgba(20,184,166,.09)}.login-card small{text-align:center;color:var(--muted)}.mobile-logo{display:none;color:var(--teal);font-weight:900}

/* Shared app shell */
.app-bg{min-height:100vh;background:radial-gradient(circle at 8% 6%,rgba(20,184,166,.08),transparent 24rem),#f3f8f8}.app-header,.test-top,.report-header{height:76px;padding:0 clamp(16px,4vw,54px);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:rgba(255,255,255,.91);backdrop-filter:blur(14px)}.header-user{display:flex;align-items:center;gap:14px;text-align:right}.dashboard-shell,.report-page{width:min(1240px,calc(100% - 30px));margin:0 auto;padding:34px 0 60px}.welcome-row{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:25px}.welcome-row h1,.report-hero h1{margin:0 0 8px;font-size:clamp(1.8rem,4vw,3.15rem);line-height:1.05;letter-spacing:-.05em}.welcome-row h1 span,.report-hero h1 span{font-family:Georgia,serif;color:var(--teal);font-weight:500;font-style:italic}.welcome-row p:not(.eyebrow),.report-hero>p:last-child{margin:0;color:var(--muted);line-height:1.6}.share-btn{border:1px solid #bcded9;border-radius:13px;background:#fff;color:var(--teal);padding:12px 15px;font-weight:800;white-space:nowrap}.share-btn:hover{background:var(--mint)}.stat-grid{display:grid;gap:12px;margin-bottom:15px}.stat-grid.four{grid-template-columns:repeat(4,1fr)}.stat-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px 20px;box-shadow:0 8px 25px rgba(17,75,77,.05)}.stat-card>span{display:block;color:var(--muted);font-size:.75rem;font-weight:750}.stat-card>b{display:block;margin:5px 0 1px;font-size:1.85rem;letter-spacing:-.04em}.stat-card small{color:#8a99a6;font-size:.7rem}.dashboard-grid,.report-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:15px}.panel{background:#fff;border:1px solid var(--line);border-radius:21px;box-shadow:var(--shadow);padding:22px}.panel-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:20px}.panel h2,.modal-card h2{margin:0;font-size:1.25rem;letter-spacing:-.025em}.spark{display:grid;place-items:center;width:36px;height:36px;border-radius:12px;background:var(--mint);color:var(--teal)}.field-title{display:block;margin-bottom:9px;color:#536879;font-size:.76rem;font-weight:850}.mode-picker{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:18px}.mode-picker button{min-width:0;display:flex;align-items:center;gap:9px;border:1.5px solid var(--line);border-radius:14px;background:#fff;color:var(--ink);padding:12px 10px;text-align:left}.mode-picker button.active{border-color:var(--teal);background:var(--mint);box-shadow:inset 0 0 0 1px var(--teal)}.mode-picker button>b{display:grid;place-items:center;flex:0 0 32px;height:32px;border-radius:10px;background:#edf5f5;color:var(--teal);font-size:1.1rem}.mode-picker span{min-width:0;font-size:.75rem;font-weight:850}.mode-picker small{display:block;overflow:hidden;text-overflow:ellipsis;color:var(--muted);font-size:.62rem;font-weight:600;white-space:nowrap;margin-top:2px}.form-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:11px}.target-preview{margin:18px 0;display:grid;grid-template-columns:1fr auto;align-items:center;gap:2px 10px;border:1px solid #bee3dc;background:linear-gradient(135deg,#f0fbf8,#f7fcfb);border-radius:14px;padding:13px 15px}.target-preview span{font-size:.7rem;color:var(--teal);font-weight:800;text-transform:uppercase;letter-spacing:.08em}.target-preview b{font-size:.9rem}.target-preview small{grid-column:1/-1;color:var(--muted)}.setup-panel>.primary-btn{width:100%}.count-pill,.read-only{border-radius:99px;background:var(--wash);color:var(--muted);padding:7px 10px;font-size:.7rem;font-weight:800}.attempt-list{display:grid;gap:7px;max-height:435px;overflow:auto;padding-right:3px}.attempt-item{display:grid;grid-template-columns:auto 1fr auto auto;gap:10px;align-items:center;border:1px solid #e5eeee;border-radius:14px;padding:10px}.attempt-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;font-weight:900}.attempt-icon.multiply{background:#e9f8f5;color:var(--teal)}.attempt-icon.divide{background:#fff3dc;color:#a96600}.attempt-icon.fraction{background:#f0ebff;color:#6d46b7}.attempt-item b{font-size:.78rem}.attempt-item small,.attempt-score small,table small{display:block;color:var(--muted);font-size:.65rem;margin-top:2px}.attempt-score{text-align:right}.status{display:inline-flex;border-radius:99px;padding:5px 8px;font-size:.64rem;font-weight:850}.status.pass{background:#e6f8ef;color:#16875b}.status.fail{background:#fff1e4;color:#b06d0b}.empty{display:grid;place-items:center;min-height:180px;text-align:center;color:var(--muted)}.empty span{font-size:1.6rem;color:#8ed7ce}.empty p{margin:6px 0;font-size:.82rem}.loading-page{min-height:100vh;display:grid;place-content:center;justify-items:center;gap:13px;background:#f3f8f8}.loading-page p{color:var(--muted)}

/* Test runner */
.test-shell{min-height:100vh;background:#eef6f6}.test-top{position:sticky;top:0;z-index:10}.test-metrics{display:flex;align-items:center;gap:10px}.test-metrics>span{min-width:78px;border:1px solid var(--line);border-radius:11px;background:#f9fcfc;padding:7px 10px;text-align:center}.test-metrics small{display:block;color:var(--muted);font-size:.62rem}.test-metrics b{font-size:.92rem}.test-metrics .danger{border-color:#f1bbbb;color:var(--red)}.timer-line{position:sticky;top:76px;z-index:10;height:4px;background:#dcebea}.timer-line span{display:block;height:100%;background:linear-gradient(90deg,var(--teal),#34d1be);transition:width 1s linear}.test-workspace{width:min(1180px,calc(100% - 28px));margin:0 auto;padding:22px 0 32px;display:grid;grid-template-columns:.92fr 1.08fr;gap:14px}.question-card,.scratch-card{position:relative;min-height:610px;border:1px solid var(--line);border-radius:21px;background:#fff;box-shadow:var(--shadow);overflow:hidden}.question-card{display:flex;flex-direction:column;padding:20px}.question-head{display:flex;justify-content:space-between;color:var(--muted);font-size:.72rem;font-weight:800}.question-area{flex:1;display:grid;place-content:center;justify-items:center}.question-area>p{margin:25px 0 0;color:var(--muted);font-size:.82rem;text-align:center}.vertical-math{width:190px;font-size:4.6rem;font-weight:900;line-height:1}.vertical-math>span{display:flex;justify-content:flex-end;gap:24px}.vertical-math i{color:var(--teal);font-style:normal}.vertical-math hr,.fraction-math hr{border:0;border-top:5px solid var(--ink);margin:8px 0 0}.inline-math{display:flex;align-items:center;gap:22px;font-size:4.2rem}.inline-math i{color:var(--teal);font-style:normal}.fraction-math{display:grid;min-width:130px;text-align:center;font-size:3.8rem;line-height:1}.fraction-math hr{width:100%;margin:8px 0 9px}.answer-form{display:flex;gap:9px}.answer-form input{font-size:1rem;font-weight:850;text-align:center}.answer-overlay{position:absolute;inset:0;z-index:5;display:grid;place-content:center;justify-items:center;padding:35px;text-align:center;animation:pop .18s ease}.answer-overlay.correct{background:linear-gradient(145deg,rgba(12,119,91,.97),rgba(20,168,144,.97));color:#fff}.answer-overlay.wrong{background:rgba(255,250,248,.98);color:var(--ink)}.answer-overlay h2{margin:8px 0;font-size:2.2rem}.answer-overlay p{max-width:540px;margin:8px 0;line-height:1.7}.answer-overlay small{color:var(--muted);margin-top:15px}.big-check,.wrong-mark{display:grid;place-items:center;width:78px;height:78px;border-radius:50%;font-size:3rem;font-weight:900}.big-check{background:rgba(255,255,255,.17)}.wrong-mark{background:#ffebe9;color:var(--red)}.overlay-count{position:absolute;right:20px;top:18px;display:grid;place-items:center;width:37px;height:37px;border-radius:50%;background:#fff0e8;color:var(--red);font-weight:900}.scratch-card{display:flex;flex-direction:column}.scratch-tools{height:66px;display:flex;align-items:center;justify-content:space-between;padding:0 15px;border-bottom:1px solid var(--line)}.scratch-tools small{display:block;color:var(--muted);font-size:.65rem}.scratch-tools span{display:flex;gap:5px}.scratch-tools button{height:35px;border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--ink);padding:0 10px;font-size:.74rem;font-weight:800}.scratch-tools button.active{background:var(--teal);color:#fff;border-color:var(--teal)}.canvas-box{position:relative;flex:1;background-image:linear-gradient(#e7f0f0 1px,transparent 1px),linear-gradient(90deg,#e7f0f0 1px,transparent 1px);background-size:25px 25px}.canvas-box canvas{position:absolute;inset:0;width:100%;height:100%;z-index:2;touch-action:none;cursor:crosshair}.canvas-watermark{position:absolute;inset:50% auto auto 50%;transform:translate(-50%,-50%);color:#afbec5;font-size:.78rem;font-weight:700;pointer-events:none}.result-page{min-height:100vh;display:grid;place-items:center;padding:25px;background:radial-gradient(circle at 50% 20%,rgba(20,184,166,.13),transparent 28rem),#eff7f7}.result-card{width:min(620px,100%);padding:45px;border:1px solid var(--line);border-radius:28px;background:#fff;text-align:center;box-shadow:var(--shadow)}.result-symbol{display:grid;place-items:center;width:82px;height:82px;border-radius:24px;margin:0 auto 22px;background:var(--mint);color:var(--teal);font-size:3rem;font-weight:900}.not-passed .result-symbol{background:#fff4e5;color:var(--orange)}.result-card h1{margin:5px 0 10px;font-size:2.4rem;letter-spacing:-.04em}.result-card>p:not(.eyebrow){color:var(--muted);line-height:1.7}.result-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:7px;margin:25px 0}.result-stats span{padding:13px 7px;border-radius:13px;background:var(--wash)}.result-stats b{display:block;font-size:1.3rem}.result-stats small{color:var(--muted);font-size:.66rem}

/* Admin, dialogs, tables */
.admin-table-panel{margin-top:15px}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;font-size:.76rem;white-space:nowrap}th{text-align:left;color:var(--muted);font-size:.64rem;text-transform:uppercase;letter-spacing:.07em;background:#f7fafa}th,td{padding:12px;border-bottom:1px solid #e7eeee}tbody tr:hover{background:#fbfdfd}tr.inactive{opacity:.5}.row-actions{display:flex;gap:5px}.row-actions button{border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--teal);padding:6px 8px;font-size:.66rem;font-weight:800}.modal-backdrop{position:fixed;inset:0;z-index:50;display:grid;place-items:center;padding:18px;background:rgba(13,38,49,.54);backdrop-filter:blur(5px)}.modal-card{position:relative;width:min(560px,100%);max-height:94vh;overflow:auto;border-radius:23px;background:#fff;padding:30px;box-shadow:0 25px 80px rgba(0,0,0,.2)}.modal-card>p:not(.eyebrow){color:var(--muted);line-height:1.6}.modal-close{position:absolute;right:14px;top:13px;border:0;border-radius:50%;width:34px;height:34px;background:#edf4f4;color:var(--ink);font-size:1.4rem}.student-form .form-grid{grid-template-columns:1fr 1fr;margin:20px 0}.student-form label:first-child,.student-form label:last-child{grid-column:1/-1}.student-form>.primary-btn{width:100%}.share-card{text-align:center}.share-symbol{display:grid;place-items:center;width:58px;height:58px;border-radius:17px;margin:0 auto 17px;background:var(--mint);color:var(--teal);font-size:1.8rem}.share-link{overflow:hidden;text-overflow:ellipsis;border:1px dashed #a9d5cf;border-radius:12px;background:#f4fbfa;padding:12px;color:#3e655f;font-size:.74rem;white-space:nowrap}.share-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:15px 0}.whatsapp-btn{display:grid;place-items:center;border-radius:13px;background:#daf6e6;color:#157948;text-decoration:none;font-weight:850}.share-card>small{color:var(--muted)}

/* Parent report */
.report-page{padding-top:0}.report-header{margin:0 calc((100vw - min(1240px,calc(100vw - 30px)))/-2);padding-left:max(16px,calc((100vw - 1240px)/2));padding-right:max(16px,calc((100vw - 1240px)/2))}.report-hero{padding:55px 0 30px}.report-hero h1{font-size:clamp(2.2rem,5vw,4rem)}.trend-chart{height:260px;display:flex;align-items:flex-end;justify-content:space-around;gap:10px;padding-top:25px;border-bottom:1px solid var(--line);background-image:linear-gradient(#edf3f3 1px,transparent 1px);background-size:100% 25%}.trend-chart>div{height:100%;flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:6px}.trend-chart span{display:block;width:min(28px,70%);border-radius:8px 8px 2px 2px;min-height:8px}.trend-chart span.pass{background:linear-gradient(var(--teal2),var(--teal))}.trend-chart span.fail{background:linear-gradient(#f8bb55,#e58b16)}.trend-chart small{font-size:.59rem;color:var(--muted)}.parent-note>p{color:var(--muted);line-height:1.7}.parent-note>div{display:flex;gap:10px;margin-top:13px;padding:12px;border-radius:13px;background:var(--wash)}.parent-note>div>span{display:grid;place-items:center;width:31px;height:31px;border-radius:50%;background:#fff;color:var(--teal);font-weight:900}.parent-note>div p{margin:0;font-size:.78rem}.parent-note>div small{display:block;color:var(--muted);line-height:1.5}.report-history{margin-top:15px}.report-footer{text-align:center;color:var(--muted);font-size:.68rem;padding:28px}

/* Hostinger installer and notices */
.installer-page{min-height:100vh;padding:35px 18px;background:radial-gradient(circle at 15% 10%,rgba(20,184,166,.12),transparent 28rem),#f3f8f8}.installer-card{width:min(760px,100%);margin:0 auto;border:1px solid var(--line);border-radius:26px;background:#fff;padding:clamp(24px,5vw,48px);box-shadow:var(--shadow)}.installer-card>.brand{margin-bottom:35px}.installer-card h1{margin:4px 0 8px;font-size:2.1rem;letter-spacing:-.04em}.installer-card>div>p:not(.eyebrow),.install-success p{color:var(--muted);line-height:1.7}.install-form{display:grid;gap:15px;margin-top:25px}.install-form h2{margin:12px 0 0;padding-top:15px;border-top:1px solid var(--line);font-size:1rem}.install-form label,.reset-form label{display:grid;gap:7px;color:#3d5366;font-size:.78rem;font-weight:800}.install-form input,.reset-form input{width:100%;border:1.5px solid var(--line);border-radius:12px;background:#fbfdfd;color:var(--ink);padding:13px 14px}.install-form .full,.student-form .full{grid-column:1/-1}.install-success{text-align:center;padding:25px 0}.install-success>span{display:grid;place-items:center;width:78px;height:78px;margin:0 auto 20px;border-radius:24px;background:var(--mint);color:var(--teal);font-size:2.7rem;font-weight:900}.install-success .primary-btn{display:inline-block;margin-top:14px;text-decoration:none}.toast{position:fixed;z-index:100;left:50%;bottom:24px;max-width:min(90vw,480px);transform:translate(-50%,30px);opacity:0;border-radius:12px;background:#17324d;color:#fff;padding:12px 17px;font-size:.8rem;font-weight:750;box-shadow:0 12px 35px rgba(0,0,0,.2);pointer-events:none}.toast.show{transform:translate(-50%,0);opacity:1}.reset-form{display:grid;gap:16px}.report-body{background:#f3f8f8}.answer-overlay:empty{display:none}

@keyframes pop{from{opacity:0;transform:scale(.98)}}
@media(max-width:920px){.login-page{grid-template-columns:1fr}.login-story{min-height:380px;padding:28px}.story-copy h1{font-size:3.3rem}.login-panel{padding:35px 20px}.dashboard-grid,.report-grid,.test-workspace{grid-template-columns:1fr}.question-card{min-height:520px}.scratch-card{min-height:500px}.stat-grid.four{grid-template-columns:1fr 1fr}.form-grid{grid-template-columns:1fr 1fr}.form-grid label:last-child{grid-column:1/-1}.report-header{margin:0 -15px;padding:0 18px}}
@media(max-width:620px){.login-story{display:none}.login-page{display:block;background:#f5fbfa;padding:18px;min-height:100vh}.login-panel{min-height:calc(100vh - 36px);padding:0}.login-card{box-shadow:none}.mobile-logo{display:block}.app-header,.test-top{height:66px;padding:0 12px}.header-user>span{display:none}.dashboard-shell,.report-page{width:min(100% - 18px,1240px);padding-top:22px}.welcome-row{align-items:flex-start;flex-direction:column}.share-btn,.welcome-row>.primary-btn{width:100%}.stat-grid.four{grid-template-columns:1fr 1fr}.stat-card{padding:14px}.stat-card>b{font-size:1.5rem}.mode-picker{grid-template-columns:1fr}.mode-picker small{white-space:normal}.form-grid,.student-form .form-grid{grid-template-columns:1fr}.student-form label{grid-column:1!important}.attempt-item{grid-template-columns:auto 1fr auto}.attempt-score{display:none}.test-metrics>span{min-width:58px;padding:5px}.test-metrics .ghost-btn{display:none}.test-top .brand small{display:none}.timer-line{top:66px}.test-workspace{width:min(100% - 14px,1180px);padding-top:10px}.question-card{min-height:470px;padding:14px}.scratch-card{min-height:430px}.vertical-math{font-size:3.8rem}.inline-math{font-size:3.2rem}.answer-form{flex-direction:column}.answer-form .primary-btn{padding:12px}.answer-overlay{padding:20px}.answer-overlay h2{font-size:1.6rem}.scratch-tools>div small{display:none}.result-card{padding:30px 18px}.result-stats{grid-template-columns:1fr 1fr}.share-actions{grid-template-columns:1fr}.whatsapp-btn{min-height:46px}.modal-card{padding:26px 18px}.report-hero{padding-top:35px}.report-header{margin:0 -9px}.report-header .brand small{display:none}}