:root{
  --bg:#0b0e13;--panel:#12161e;--panel-2:#171c25;--panel-3:#1c222d;--text:#f5f6f8;--muted:#969ca8;
  --line:rgba(255,255,255,.095);--line-strong:rgba(255,255,255,.16);--lime:#b8ff63;--lime-2:#88d73c;
  --cyan:#73d8ff;--red:#ff777b;--amber:#ffcc70;--green:#80ec9b;--shadow:0 28px 80px rgba(0,0,0,.38);
  --radius:24px;--radius-sm:15px;--max:1220px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.5;min-height:100vh;overflow-x:hidden}button,input,textarea,select{font:inherit}button,a{color:inherit}button{cursor:pointer}a{text-decoration:none}.hidden{display:none!important}
.ambient{position:fixed;pointer-events:none;z-index:-1;filter:blur(30px);opacity:.48}.ambient-one{width:560px;height:560px;top:-240px;right:-100px;background:radial-gradient(circle,rgba(184,255,99,.18),transparent 67%)}.ambient-two{width:500px;height:500px;left:-240px;top:45%;background:radial-gradient(circle,rgba(115,216,255,.1),transparent 68%)}
.topbar{position:sticky;top:0;z-index:50;height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100vw - var(--max))/2));background:rgba(11,14,19,.82);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:11px;font-weight:900;letter-spacing:-.04em}.brand-button{background:none;border:0;padding:0}.brand-mark{display:grid;place-items:center;width:39px;height:39px;border-radius:12px;background:var(--lime);color:#0b0e13;font-size:23px;box-shadow:0 0 0 1px rgba(255,255,255,.15) inset}.brand-word{font-size:20px}.brand-word span{color:var(--lime)}
.nav-links{display:flex;gap:4px;padding:4px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.025)}.nav-link{border:0;background:transparent;color:var(--muted);padding:9px 14px;border-radius:10px;font-size:13px;font-weight:800}.nav-link:hover,.nav-link.active{color:var(--text);background:rgba(255,255,255,.075)}
.account-area,.admin-top-actions{position:relative;display:flex;align-items:center;gap:8px}.ghost-button,.secondary-button,.primary-button,.user-pill{border-radius:13px;padding:12px 17px;font-weight:850;border:1px solid var(--line);transition:.2s ease}.ghost-button{background:transparent;color:#d5d8df}.ghost-button:hover,.secondary-button:hover{background:rgba(255,255,255,.07);border-color:var(--line-strong)}.primary-button{display:inline-flex;align-items:center;justify-content:center;gap:10px;border-color:transparent;background:var(--lime);color:#0c1014;box-shadow:0 10px 30px rgba(184,255,99,.15)}.primary-button:hover{transform:translateY(-1px);background:#c6ff80}.primary-button:disabled{opacity:.5;cursor:not-allowed;transform:none}.secondary-button{background:rgba(255,255,255,.035);color:var(--text)}.small{padding:11px 15px}.tiny{padding:8px 11px;font-size:12px}.user-pill{display:flex;align-items:center;gap:9px;background:rgba(255,255,255,.04);color:var(--text)}.user-avatar{display:grid;place-items:center;width:27px;height:27px;border-radius:9px;background:var(--lime);color:#111;font-weight:900}.account-menu{position:absolute;right:0;top:52px;min-width:140px;padding:7px;border:1px solid var(--line);border-radius:13px;background:#171b23;box-shadow:var(--shadow)}.account-menu button{width:100%;border:0;background:transparent;text-align:left;padding:10px;border-radius:9px}.account-menu button:hover{background:rgba(255,255,255,.07)}
.hero{max-width:var(--max);min-height:680px;margin:0 auto;padding:80px 0 72px;display:grid;grid-template-columns:1.02fr .98fr;align-items:center;gap:70px}.eyebrow,.section-kicker{color:var(--lime);font-size:12px;text-transform:uppercase;letter-spacing:.16em;font-weight:900}.eyebrow{display:flex;align-items:center;gap:9px}.eyebrow span{width:26px;height:1px;background:var(--lime)}.hero h1{font-size:clamp(48px,5.4vw,79px);line-height:.99;letter-spacing:-.065em;margin:23px 0}.hero h1 em{font-style:normal;color:#9da3ad}.hero-copy>p{max-width:620px;color:#b1b6c0;font-size:18px;line-height:1.7}.hero-actions{display:flex;gap:12px;margin-top:31px}.hero-meta{display:flex;gap:35px;margin-top:44px}.hero-meta div{display:grid;gap:2px}.hero-meta strong{font-size:26px;letter-spacing:-.04em}.hero-meta span{color:var(--muted);font-size:12px}
.hero-visual{position:relative}.preview-window{position:relative;border:1px solid var(--line-strong);border-radius:26px;background:linear-gradient(145deg,#171b23,#10131a);box-shadow:var(--shadow);overflow:hidden;transform:perspective(1200px) rotateY(-4deg) rotateX(2deg)}.preview-top{height:58px;display:flex;align-items:center;gap:17px;padding:0 20px;border-bottom:1px solid var(--line);color:var(--muted);font-size:12px}.preview-top span{flex:1}.preview-dots{display:flex;gap:6px}.preview-dots i{width:7px;height:7px;border-radius:50%;background:#4e5562}.preview-progress{height:3px;background:rgba(255,255,255,.05)}.preview-progress span{display:block;width:70%;height:100%;background:var(--lime)}.preview-card{padding:33px}.mini-label{font-size:11px;color:var(--lime);text-transform:uppercase;font-weight:900;letter-spacing:.12em}.preview-card h3{font-size:27px;line-height:1.2;letter-spacing:-.04em;margin:13px 0 24px}.preview-options{display:grid;gap:9px}.preview-options span{display:flex;justify-content:space-between;padding:13px 14px;border:1px solid var(--line);border-radius:12px;color:#bcc1ca;font-size:13px}.preview-options .selected{color:#111;background:var(--lime);border-color:var(--lime);font-weight:850}.preview-result{display:flex;gap:12px;align-items:center;margin-top:20px;padding:13px;border-radius:13px;background:rgba(128,236,155,.08);border:1px solid rgba(128,236,155,.2)}.preview-result>span{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--green);color:#111;font-weight:950}.preview-result div{display:grid}.preview-result small{color:var(--muted)}.floating-tag{position:absolute;z-index:3;padding:10px 13px;border-radius:12px;background:#202631;border:1px solid var(--line-strong);box-shadow:var(--shadow);font-size:12px;font-weight:850}.tag-one{left:-34px;top:62px}.tag-two{right:-23px;bottom:52px;color:var(--lime)}
.catalog-section,.how-section,.grading-section{max-width:var(--max);margin:0 auto;padding:86px 0}.section-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:31px}.section-head h2,.grading-copy h2{font-size:44px;line-height:1.05;letter-spacing:-.055em;margin:8px 0 0}.section-head p{color:var(--muted);margin:10px 0 0}.compact{margin-bottom:24px}.subject-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.subject-card{position:relative;min-height:295px;padding:25px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(145deg,rgba(255,255,255,.055),rgba(255,255,255,.018));overflow:hidden;text-align:left}.subject-card:before{content:"";position:absolute;width:180px;height:180px;border-radius:50%;right:-70px;top:-70px;background:radial-gradient(circle,var(--accent),transparent 70%);opacity:.18}.subject-card:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--accent) 45%,transparent);box-shadow:0 20px 55px rgba(0,0,0,.24)}.subject-icon,.subject-hero-icon{display:grid;place-items:center;width:54px;height:54px;border-radius:17px;background:color-mix(in srgb,var(--accent) 16%,#12161e);border:1px solid color-mix(in srgb,var(--accent) 30%,transparent);color:var(--accent);font-size:25px}.subject-card h3{font-size:26px;letter-spacing:-.04em;margin:42px 0 10px}.subject-card p{color:var(--muted);min-height:48px}.subject-card-meta{display:flex;justify-content:space-between;align-items:center;margin-top:27px;padding-top:18px;border-top:1px solid var(--line);font-size:12px;color:#c5c9d1}.subject-card-meta span:last-child{color:var(--accent);font-weight:900}.skeleton-card{height:295px;border-radius:22px;background:linear-gradient(90deg,#141922,#1d232e,#141922);background-size:200% 100%;animation:shimmer 1.3s infinite}@keyframes shimmer{to{background-position:-200% 0}}
.how-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.how-grid article{position:relative;padding:27px;border:1px solid var(--line);border-radius:20px;background:rgba(255,255,255,.025)}.step-number{position:absolute;right:19px;top:17px;color:#535a67;font-weight:900}.step-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:15px;background:rgba(184,255,99,.1);color:var(--lime);font-size:23px}.how-grid h3{font-size:21px;margin:28px 0 8px}.how-grid p{color:var(--muted);margin:0;line-height:1.65}.grading-section{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center;padding-bottom:120px}.grading-copy p{color:var(--muted);max-width:580px}.grade-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.grade-cards div{display:grid;gap:7px;padding:23px 15px;border:1px solid var(--line);border-radius:18px;text-align:center;background:rgba(255,255,255,.025)}.grade-cards strong{font-size:29px;color:var(--lime)}.grade-cards span{color:var(--muted);font-size:12px}
.topics-view{min-height:calc(100vh - 76px)}.topics-shell{max-width:var(--max);margin:0 auto;padding:55px 0 100px}.back-button{border:0;background:transparent;color:var(--muted);font-weight:800;padding:8px 0}.back-button:hover{color:var(--text)}.subject-hero{--accent:var(--lime);display:flex;align-items:center;gap:24px;margin:38px 0 65px;padding:34px;border:1px solid var(--line);border-radius:24px;background:linear-gradient(130deg,color-mix(in srgb,var(--accent) 9%,transparent),rgba(255,255,255,.025))}.subject-hero h1{font-size:48px;letter-spacing:-.055em;margin:6px 0}.subject-hero p{color:var(--muted);margin:0}.subject-hero-icon{width:76px;height:76px;border-radius:22px;font-size:34px;flex:0 0 auto}.topic-list{display:grid;gap:12px}.topic-card{display:grid;grid-template-columns:1fr auto;align-items:center;gap:20px;padding:24px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.025);text-align:left}.topic-card:hover{background:rgba(255,255,255,.05);border-color:var(--line-strong)}.topic-card h3{font-size:22px;letter-spacing:-.035em;margin:0 0 7px}.topic-card p{color:var(--muted);margin:0}.topic-card-meta{display:flex;gap:8px;margin-top:15px}.topic-card-meta span{padding:6px 9px;border-radius:8px;background:rgba(255,255,255,.05);font-size:11px;color:#b7bcc6}.topic-card-arrow{display:grid;place-items:center;width:43px;height:43px;border-radius:13px;background:var(--lime);color:#111;font-size:19px;font-weight:900}.empty-state{padding:44px 20px;color:var(--muted);text-align:center;border:1px dashed var(--line);border-radius:16px}
.workspace{min-height:calc(100vh - 76px);display:grid;grid-template-columns:330px 1fr}.workspace-sidebar{position:sticky;top:76px;height:calc(100vh - 76px);padding:31px 25px;border-right:1px solid var(--line);background:#0e1117;overflow:auto}.module-summary{display:flex;align-items:center;gap:14px;margin:31px 0}.module-icon{display:grid;place-items:center;width:49px;height:49px;border-radius:15px;background:rgba(184,255,99,.12);color:var(--lime);font-size:22px}.module-summary small{color:var(--muted)}.module-summary h2{font-size:19px;margin:2px 0;line-height:1.2}.side-progress>div:first-child{display:flex;justify-content:space-between;font-size:12px}.progress-track{height:7px!important;margin-top:9px;border-radius:20px;background:#252a34;overflow:hidden}.progress-track span{display:block;width:0;height:100%;background:var(--lime);transition:.3s}.question-nav{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin:28px 0}.question-nav button{aspect-ratio:1;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--muted);font-size:11px;font-weight:850}.question-nav button.active{border-color:var(--lime);color:var(--lime);background:rgba(184,255,99,.08)}.question-nav button.done{background:var(--lime);border-color:var(--lime);color:#111}.question-nav button.written-done{background:rgba(115,216,255,.16);border-color:rgba(115,216,255,.4);color:var(--cyan)}.sync-note{display:flex;gap:10px;margin-top:auto;padding:13px;border:1px solid var(--line);border-radius:13px}.sync-note>span{color:var(--amber);font-size:11px}.sync-note div{display:grid}.sync-note strong{font-size:12px}.sync-note small{color:var(--muted)}.sync-note.synced>span{color:var(--green)}
.workspace-main{min-width:0}.workspace-top{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 38px;border-bottom:1px solid var(--line);background:rgba(11,14,19,.72);backdrop-filter:blur(12px);position:sticky;top:76px;z-index:15}.question-counter{font-size:13px;color:var(--muted);font-weight:800}.mobile-module-title{display:none}.question-card{max-width:900px;margin:55px auto;padding:41px;border:1px solid var(--line);border-radius:26px;background:linear-gradient(145deg,#151922,#10141b);box-shadow:0 18px 55px rgba(0,0,0,.18)}.question-tag{display:inline-flex;padding:7px 10px;border-radius:9px;background:rgba(184,255,99,.1);color:var(--lime);font-size:11px;text-transform:uppercase;letter-spacing:.09em;font-weight:900}.question-card h1{font-size:32px;line-height:1.28;letter-spacing:-.035em;margin:19px 0 27px;white-space:pre-line}.question-images img{display:block;max-width:100%;max-height:540px;margin:0 auto 25px;border-radius:17px;background:#fff}.answers{display:grid;gap:10px}.answer-option{position:relative;display:flex;align-items:flex-start;gap:13px;padding:16px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.018);cursor:pointer}.answer-option:hover{border-color:var(--line-strong);background:rgba(255,255,255,.04)}.answer-option input{position:absolute;opacity:0}.answer-box{display:grid;place-items:center;width:24px;height:24px;flex:0 0 auto;border:1px solid #4f5663;border-radius:8px;color:transparent;font-size:13px}.answer-option:has(input:checked){border-color:var(--lime);background:rgba(184,255,99,.065)}.answer-option:has(input:checked) .answer-box{background:var(--lime);border-color:var(--lime);color:#111}.answer-option.single .answer-box{border-radius:50%}.answer-option.correct{border-color:rgba(128,236,155,.5);background:rgba(128,236,155,.08)}.answer-option.wrong{border-color:rgba(255,119,123,.5);background:rgba(255,119,123,.07)}.answer-key{color:var(--muted);font-weight:900}.text-input-wrap,.written-input-wrap{display:grid;gap:8px}.text-input-wrap label,.written-input-wrap label{font-size:12px;font-weight:850;color:#cbd0d7}.text-input-wrap input,.written-input-wrap textarea{width:100%;border:1px solid var(--line);border-radius:14px;background:#0f131a;color:var(--text);padding:16px;outline:none}.written-input-wrap textarea{min-height:230px;resize:vertical}.text-input-wrap input:focus,.written-input-wrap textarea:focus{border-color:var(--lime)}.written-input-wrap small{color:var(--muted)}.feedback{margin-top:20px;padding:17px;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.03)}.feedback.success{border-color:rgba(128,236,155,.3);background:rgba(128,236,155,.07)}.feedback.error{border-color:rgba(255,119,123,.3);background:rgba(255,119,123,.07)}.feedback.model{border-color:rgba(115,216,255,.3);background:rgba(115,216,255,.06)}.feedback strong{display:block;margin-bottom:6px}.feedback p{margin:7px 0;color:#c4c9d2;white-space:pre-line}.feedback small{color:var(--muted)}.question-actions{display:flex;justify-content:space-between;gap:12px;margin-top:26px}.question-actions .primary-button{margin-left:auto}
.completion-card{max-width:850px;margin:70px auto;padding:48px;border:1px solid var(--line);border-radius:27px;background:linear-gradient(145deg,#151a22,#10131a);text-align:center}.completion-orbit{display:grid;place-items:center;width:92px;height:92px;margin:0 auto 23px;border-radius:50%;background:radial-gradient(circle,var(--lime),var(--lime-2));color:#111;box-shadow:0 0 0 12px rgba(184,255,99,.05),0 0 0 24px rgba(184,255,99,.025)}.completion-orbit span{font-size:42px;font-weight:950}.completion-card h2{font-size:40px;letter-spacing:-.05em;margin:9px 0}.completion-card>p{color:var(--muted)}.score-row{display:flex;justify-content:center;align-items:center;gap:27px;margin:34px 0}.score-ring{display:grid;place-items:center;width:145px;height:145px;border-radius:50%;border:9px solid rgba(184,255,99,.14);box-shadow:inset 0 0 0 2px var(--lime)}.score-ring strong{font-size:27px}.score-ring span{font-size:11px;color:var(--muted)}.score-detail{display:grid;gap:8px;text-align:left}.score-detail div{padding:9px 12px;border-radius:10px;background:rgba(255,255,255,.04);font-size:13px}.completion-actions{display:flex;justify-content:center;gap:10px}
.modal{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:20px}.modal-backdrop{position:absolute;inset:0;background:rgba(3,5,8,.72);backdrop-filter:blur(8px)}.modal-panel{position:relative;z-index:2;width:min(100%,460px);max-height:calc(100vh - 40px);overflow:auto;padding:31px;border:1px solid var(--line-strong);border-radius:24px;background:#151922;box-shadow:var(--shadow)}.wide-modal{width:min(100%,660px)}.question-editor-modal{width:min(100%,1020px)}.modal-close{position:absolute;right:17px;top:14px;width:34px;height:34px;border:0;border-radius:10px;background:rgba(255,255,255,.05);color:var(--muted);font-size:21px}.auth-logo span{display:grid;place-items:center;width:48px;height:48px;border-radius:15px;background:var(--lime);color:#111;font-size:27px;font-weight:950}.modal-panel h2{font-size:31px;letter-spacing:-.045em;margin:20px 0 8px}.modal-panel>p{color:var(--muted);margin:0 0 22px}.auth-tabs{display:grid;grid-template-columns:1fr 1fr;padding:4px;border:1px solid var(--line);border-radius:13px;margin-bottom:20px}.auth-tabs button{border:0;background:transparent;color:var(--muted);padding:10px;border-radius:9px;font-weight:900}.auth-tabs button.active{background:rgba(255,255,255,.08);color:var(--text)}.auth-form,.admin-form{display:grid;gap:15px}.auth-form label,.admin-form label,.filter-bar label,.import-form label{display:grid;gap:7px;font-size:12px;font-weight:850;color:#cdd1d8}.auth-form input,.admin-form input,.admin-form textarea,.admin-form select,.filter-bar select,.import-form select{width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:12px;background:#0f131a;color:var(--text);outline:none}.auth-form input:focus,.admin-form input:focus,.admin-form textarea:focus,.admin-form select:focus,.filter-bar select:focus,.import-form select:focus{border-color:var(--lime)}select option{background:#151922}.form-message{padding:11px;margin-top:13px;border-radius:11px;background:rgba(255,119,123,.1);color:#ffb1b4;font-size:13px}.progress-modal-panel{width:min(100%,720px)}.progress-history{display:grid;gap:10px;margin-top:22px}.history-item{display:grid;grid-template-columns:1fr auto;gap:12px;padding:15px;border:1px solid var(--line);border-radius:13px}.history-item strong{display:block}.history-item small{color:var(--muted)}.history-grade{display:grid;place-items:center;width:44px;height:44px;border-radius:13px;background:var(--lime);color:#111;font-size:20px;font-weight:950}.toast-stack{position:fixed;right:20px;bottom:20px;z-index:180;display:grid;gap:8px}.toast{padding:13px 16px;border-radius:13px;background:#252b35;border:1px solid var(--line);box-shadow:var(--shadow);font-size:13px;animation:toastIn .25s ease}.toast.success{border-color:rgba(128,236,155,.35)}.toast.error{border-color:rgba(255,119,123,.35)}@keyframes toastIn{from{opacity:0;transform:translateY(10px)}}
/* Admin */
.admin-body{background:#0b0e13}.admin-topbar{position:fixed;left:0;right:0}.admin-app{padding-top:76px}.admin-gate{min-height:calc(100vh - 76px);display:grid;place-items:center;padding:30px}.gate-card{width:min(100%,520px);padding:40px;border:1px solid var(--line);border-radius:25px;background:var(--panel);box-shadow:var(--shadow)}.gate-card h1{font-size:38px;letter-spacing:-.05em;margin:13px 0}.gate-card p{color:var(--muted)}.gate-card form{display:grid;gap:12px;margin-top:24px}.gate-card input{padding:14px;border:1px solid var(--line);border-radius:13px;background:#0e1218;color:white}.admin-shell{display:grid;grid-template-columns:245px 1fr;min-height:calc(100vh - 76px)}.admin-sidebar{position:fixed;top:76px;bottom:0;width:245px;padding:26px 18px;border-right:1px solid var(--line);background:#0e1117;display:flex;flex-direction:column;gap:7px}.admin-label{padding:0 10px 12px;color:#686f7b;font-size:10px;text-transform:uppercase;letter-spacing:.15em;font-weight:900}.admin-nav{display:flex;align-items:center;gap:11px;width:100%;padding:12px;border:0;border-radius:12px;background:transparent;color:var(--muted);font-weight:800;text-align:left}.admin-nav span{display:grid;place-items:center;width:26px;height:26px;border-radius:8px;background:rgba(255,255,255,.04)}.admin-nav:hover,.admin-nav.active{background:rgba(255,255,255,.06);color:var(--text)}.admin-nav.active span{background:var(--lime);color:#111}.admin-sidebar-note{margin-top:auto;display:grid;gap:4px;padding:14px;border:1px solid var(--line);border-radius:13px}.admin-sidebar-note strong{font-size:12px;margin-bottom:3px}.admin-sidebar-note span{font-size:11px;color:var(--muted)}.admin-main{grid-column:2;padding:42px;min-width:0}.admin-page-head{display:flex;justify-content:space-between;align-items:center;gap:25px;margin-bottom:28px}.admin-page-head h1{font-size:43px;letter-spacing:-.055em;margin:5px 0}.admin-page-head p{color:var(--muted);margin:0}.stats-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-bottom:22px}.stat-card{padding:20px;border:1px solid var(--line);border-radius:17px;background:var(--panel)}.stat-card span{display:block;color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.1em}.stat-card strong{display:block;font-size:32px;margin-top:12px}.admin-card{padding:22px;border:1px solid var(--line);border-radius:19px;background:var(--panel)}.admin-card-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:18px}.admin-card-head h2{font-size:22px;letter-spacing:-.035em;margin:5px 0}.data-list{display:grid;gap:8px}.data-row{display:grid;grid-template-columns:1fr auto;align-items:center;gap:13px;padding:13px;border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.018)}.data-row:hover{background:rgba(255,255,255,.04)}.data-row-title{font-weight:850}.data-row-meta{display:flex;flex-wrap:wrap;gap:7px;margin-top:4px;color:var(--muted);font-size:11px}.data-row-actions{display:flex;gap:6px}.icon-button{display:grid;place-items:center;width:35px;height:35px;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--muted)}.icon-button:hover{color:var(--text);background:rgba(255,255,255,.06)}.icon-button.danger:hover{color:#ffaaaD;border-color:rgba(255,119,123,.3)}.status-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--green)}.status-dot.off{background:#59606c}.structure-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:16px}.filter-bar{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:16px;padding:16px;border:1px solid var(--line);border-radius:15px;background:var(--panel)}.question-admin-list .data-row{grid-template-columns:auto 1fr auto}.type-badge{padding:6px 8px;border-radius:8px;background:rgba(184,255,99,.1);color:var(--lime);font-size:10px;text-transform:uppercase;font-weight:900}.form-two{display:grid;grid-template-columns:1fr 1fr;gap:12px}.form-three{display:grid;grid-template-columns:130px 1fr auto;align-items:end;gap:12px}.check-label{display:flex!important;align-items:center;gap:10px;padding:13px;border:1px solid var(--line);border-radius:12px}.check-label input{width:auto}.question-editor-head{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:22px}.question-type-tabs{display:flex;flex-wrap:wrap;gap:6px}.question-type-tabs button{padding:8px 10px;border:1px solid var(--line);border-radius:9px;background:transparent;color:var(--muted);font-size:11px;font-weight:850}.question-type-tabs button.active{background:var(--lime);border-color:var(--lime);color:#111}.field-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:7px}.option-editor,.text-answer-editor{display:grid;gap:8px}.option-editor-row,.text-answer-row{display:grid;grid-template-columns:44px 1fr auto;gap:8px;align-items:center}.option-editor-row input[type=text],.text-answer-row input[type=text]{padding:12px}.option-editor-row .correct-toggle{display:grid;place-items:center;width:40px;height:40px;border:1px solid var(--line);border-radius:10px}.option-editor-row .correct-toggle:has(input:checked){background:var(--lime);color:#111;border-color:var(--lime)}.option-editor-row .correct-toggle input{width:auto}.image-url-preview{padding:12px;border:1px solid var(--line);border-radius:14px}.image-url-preview img{display:block;max-width:100%;max-height:260px;margin:auto;border-radius:10px}.import-grid{display:grid;grid-template-columns:390px 1fr;gap:16px;align-items:start}.import-form{display:grid;gap:15px}.file-drop{display:grid!important;place-items:center;text-align:center;gap:5px;padding:35px 20px;border:1px dashed var(--line-strong);border-radius:16px;background:rgba(255,255,255,.018);cursor:pointer}.file-drop:hover{border-color:var(--lime);background:rgba(184,255,99,.035)}.file-drop input{display:none}.file-drop-icon{font-size:33px;color:var(--lime)}.file-drop small{color:var(--muted)}.import-note{padding:13px;border-radius:12px;background:rgba(255,204,112,.065);border:1px solid rgba(255,204,112,.15)}.import-note p{color:#bfc3cb;font-size:12px}.import-note a{display:inline-block;margin-right:12px;color:var(--lime);font-size:12px;font-weight:850}.import-preview{display:grid;gap:10px;max-height:650px;overflow:auto}.import-question{padding:15px;border:1px solid var(--line);border-radius:13px;background:rgba(255,255,255,.02)}.import-question-head{display:flex;justify-content:space-between;gap:10px;margin-bottom:8px}.import-question h4{margin:0;font-size:15px}.import-question p{margin:5px 0;color:var(--muted);font-size:12px}.import-warning{padding:10px 12px;margin-bottom:9px;border-radius:10px;background:rgba(255,204,112,.08);border:1px solid rgba(255,204,112,.18);color:#f1d298;font-size:12px}
@media(max-width:1100px){.hero,.catalog-section,.how-section,.grading-section,.topics-shell{padding-left:24px;padding-right:24px}.topbar{padding:0 24px}.hero{grid-template-columns:1fr;gap:45px}.hero-visual{max-width:720px}.subject-grid{grid-template-columns:repeat(2,1fr)}.stats-grid{grid-template-columns:repeat(3,1fr)}.import-grid{grid-template-columns:1fr}.admin-main{padding:30px}.workspace{grid-template-columns:280px 1fr}}
@media(max-width:800px){.topbar{height:68px;padding:0 15px}.nav-links{display:none}.brand-word{font-size:17px}.admin-link{display:none!important}.hero{padding-top:55px;min-height:auto}.hero h1{font-size:49px}.hero-copy>p{font-size:16px}.hero-actions{flex-direction:column;align-items:stretch}.hero-meta{gap:22px}.preview-window{transform:none}.floating-tag{display:none}.subject-grid,.how-grid,.grading-section,.grade-cards{grid-template-columns:1fr}.grading-section{gap:30px}.section-head h2,.grading-copy h2{font-size:36px}.topics-shell{padding-top:35px}.subject-hero{align-items:flex-start}.subject-hero h1{font-size:36px}.workspace{display:block}.workspace-sidebar{position:fixed;z-index:40;left:0;top:68px;bottom:0;width:300px;height:auto;transform:translateX(-102%);transition:.25s;box-shadow:var(--shadow)}.workspace-sidebar.open{transform:none}.workspace-top{top:68px;padding:0 16px}.mobile-module-title{display:flex;align-items:center;gap:9px}.mobile-module-title button{border:0;background:transparent;color:var(--text);font-size:20px}.question-counter{font-size:11px}.question-card,.completion-card{margin:25px 14px;padding:23px}.question-card h1{font-size:25px}.question-actions{flex-wrap:wrap}.question-actions .primary-button{width:100%;order:-1}.score-row{flex-direction:column}.modal-panel{padding:24px}.admin-shell{display:block}.admin-sidebar{position:static;width:auto;height:auto;display:flex;flex-direction:row;overflow:auto;padding:12px;border-right:0;border-bottom:1px solid var(--line)}.admin-sidebar-note,.admin-label{display:none}.admin-nav{width:auto;white-space:nowrap}.admin-main{grid-column:auto;padding:20px 14px}.admin-page-head{align-items:flex-start;flex-direction:column}.admin-page-head h1{font-size:35px}.stats-grid{grid-template-columns:repeat(2,1fr)}.structure-grid{grid-template-columns:1fr}.form-two,.form-three,.filter-bar{grid-template-columns:1fr}.question-editor-head{flex-direction:column}.question-editor-modal{padding-top:55px}.admin-topbar{height:68px}.admin-app{padding-top:68px}.admin-gate{min-height:calc(100vh - 68px)}}
@media(max-width:520px){.subject-grid{grid-template-columns:1fr}.subject-card{min-height:260px}.hero{padding-left:16px;padding-right:16px}.hero h1{font-size:41px}.catalog-section,.how-section,.grading-section,.topics-shell{padding-left:16px;padding-right:16px}.subject-hero{padding:22px;gap:15px}.subject-hero-icon{width:58px;height:58px}.topic-card{padding:18px}.topic-card p{font-size:13px}.account-area .ghost-button{padding:9px 11px}.admin-top-actions .ghost-button{display:none}.stats-grid{grid-template-columns:1fr 1fr}.stat-card strong{font-size:26px}.option-editor-row{grid-template-columns:36px 1fr auto}}