:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;color:#17201b;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;background:#f4f7f5;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{background:#f4f7f5;min-width:320px;margin:0}button,input,select{font:inherit}button{cursor:pointer}.app-shell{flex-direction:column;min-height:100dvh;padding-left:248px;display:flex}.app-shell.sidebar-compact{padding-left:88px}.mobile-download-panel,.mobile-appbar,.mobile-drawer-close,.mobile-drawer-backdrop{display:none}.topbar{z-index:10;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#fffffff5;border-right:1px solid #dde6e1;grid-template-rows:auto 1fr auto;width:248px;padding:24px 18px;display:grid;position:fixed;inset:0 auto 0 0}.topbar.compact{grid-template-rows:auto 1fr auto;justify-items:center;width:88px;padding:18px 12px}.mobile-download-copy,.mobile-download-actions,.mobile-download-actions a{align-items:center;display:flex}.mobile-download-copy{gap:10px;min-width:0}.mobile-download-icon{color:#fff;background:#0f8f5f;border-radius:8px;flex:none;place-items:center;width:36px;height:36px;display:grid}.mobile-download-copy div{gap:2px;min-width:0;display:grid}.mobile-download-copy strong{color:#17201b;text-overflow:ellipsis;white-space:nowrap;font-size:14px;font-weight:820;line-height:1.25;overflow:hidden}.mobile-download-copy span:last-child{color:#66736d;text-overflow:ellipsis;white-space:nowrap;font-size:12px;font-weight:650;line-height:1.35;overflow:hidden}.mobile-download-actions{flex:none;gap:8px}.mobile-download-actions a{color:#17201b;background:#fff;border:1px solid #cfdcd5;border-radius:8px;justify-content:center;gap:6px;min-height:36px;padding:0 10px;font-size:13px;font-weight:780;text-decoration:none}.mobile-download-actions a:hover{color:#0f6f4c;border-color:#0f8f5f}.brand{color:#17201b;align-items:flex-start;gap:10px;font-size:16px;font-weight:760;line-height:1.15;text-decoration:none;display:inline-flex}.brand-logo{object-fit:cover;border-radius:8px;width:34px;height:34px}.brand span{gap:2px;min-width:0;max-width:170px;display:grid}.brand small{color:#66736d;font-size:11px;font-weight:680;line-height:1.25}.sidebar-toggle{z-index:2;color:#45534d;background:#fffffffa;border:1px solid #dde6e1;border-radius:999px;place-items:center;width:32px;height:32px;display:grid;position:absolute;top:74px;right:-16px;box-shadow:0 8px 22px #233a2e1f}.sidebar-toggle:hover{color:#0f6f4c;background:#eef6f1;border-color:#cfe6da}.main-nav{align-content:start;gap:6px;margin-top:28px;display:grid}.main-nav a{color:#66736d;text-align:left;background:0 0;border:0;border-radius:8px;justify-content:flex-start;align-items:center;gap:8px;min-height:42px;padding:0 13px;font-size:14px;font-weight:650;text-decoration:none;display:flex}.nav-icon{flex:none;place-items:center;width:22px;height:22px;display:grid}.nav-label{min-width:0}.main-nav a.active,.main-nav a:hover{color:#0f6f4c;background:#eef6f1}.topbar.compact .brand{justify-content:center}.topbar.compact .brand span,.topbar.compact .nav-label{display:none}.topbar.compact .topbar-actions{align-self:end;justify-items:center;gap:12px;width:100%;display:grid}.topbar.compact .account-actions>.secondary-button,.topbar.compact .account-copy{display:none}.topbar.compact .learning-status-panel{background:0 0;border:0;justify-items:center;width:58px;padding:0;display:grid}.topbar.compact .learning-status-panel>:not(.compact-progress-ring){display:none}.topbar.compact .compact-progress-ring{display:grid}.topbar.compact .account-actions{justify-items:center;width:100%;display:grid}.topbar.compact .account-card{grid-template-columns:1fr;place-items:center;width:46px;height:46px;padding:5px;display:grid}.topbar.compact .topbar-actions>.secondary-button{justify-content:center;gap:0;width:46px;min-height:46px;padding:0;font-size:0}.topbar.compact .topbar-actions>.secondary-button svg{width:18px;height:18px}.topbar.compact .account-avatar{width:34px;height:34px}.topbar.compact .main-nav{width:100%;margin-top:18px}.topbar.compact .main-nav a{justify-content:center;min-height:46px;padding:0;position:relative}.topbar.compact .main-nav a>svg{width:12px;height:12px;position:absolute;top:7px;right:7px}.topbar-actions{align-items:stretch;gap:10px;display:grid}.learning-status-panel{background:#f8fbf9;border:1px solid #d6e4dd;border-radius:8px;gap:10px;padding:12px;display:grid}.status-license-select{color:#66736d;justify-content:space-between;align-items:center;gap:10px;font-size:12px;font-weight:760;display:flex}.status-select-wrap{background:#fff;border:1px solid #cfdcd5;border-radius:8px;justify-content:space-between;align-items:center;gap:6px;min-width:72px;height:32px;display:inline-flex;position:relative}.status-license-button{color:#17201b;cursor:pointer;padding:0 28px 0 10px;font-weight:820}.status-license-button:disabled{color:#8a9991;cursor:progress}.status-license-button:hover,.status-license-button:focus-visible{border-color:#0f8f5f;outline:0;box-shadow:0 0 0 3px #0f8f5f1f}.status-select-wrap svg{color:#66736d;pointer-events:none;position:absolute;right:8px}.status-meter{gap:2px;display:grid}.status-meter strong{color:#17201b;font-size:28px;line-height:1}.status-meter span{color:#66736d;font-size:12px;font-weight:680;line-height:1.35}.compact-progress-ring{border-radius:999px;place-items:center;width:58px;height:58px;display:none;position:relative;box-shadow:inset 0 0 0 1px #0f8f5f1f}.compact-progress-ring:before{content:"";border-radius:inherit;background:#fff;position:absolute;inset:6px;box-shadow:0 6px 18px #0f6f4c1a}.compact-progress-ring span{color:#0f6f4c;background:#eef6f1;border-radius:999px;place-items:center;width:34px;height:34px;font-size:13px;font-weight:900;line-height:1;display:grid;position:relative}.status-bar{background:#e3eee8;border-radius:999px;height:7px;overflow:hidden}.status-bar span{border-radius:inherit;background:#0f8f5f;height:100%;display:block}.status-meta,.status-review-line{flex-wrap:wrap;gap:6px;display:flex}.status-meta span,.status-review-line span,.status-review-line{color:#66736d;font-size:11px;font-weight:720;line-height:1.35}.status-meta span,.status-review-line span{background:#fff;border-radius:999px;padding:5px 7px}.account-actions{gap:8px;display:grid}.account-card{text-align:left;cursor:pointer;background:#fff;border:1px solid #dde6e1;border-radius:8px;grid-template-columns:34px minmax(0,1fr);align-items:center;gap:9px;width:100%;min-width:0;padding:8px;transition:border-color .16s,background .16s,transform .16s;display:grid}.account-card:hover,.account-card.active{background:#eef6f1;border-color:#cfe6da}.account-card:hover{transform:translateY(-1px)}.account-avatar{object-fit:cover;border-radius:8px;width:34px;height:34px}.account-avatar-fallback{color:#fff;background:#0f8f5f;justify-content:center;align-items:center;font-size:14px;font-weight:800;display:inline-flex}.account-copy{gap:2px;min-width:0;display:grid}.account-copy strong,.account-copy span,.account-copy small{text-overflow:ellipsis;white-space:nowrap;min-width:0;display:block;overflow:hidden}.account-copy strong{color:#17201b;font-size:13px;font-weight:760}.account-copy span{color:#66736d;font-size:12px;font-weight:620}.account-copy small{color:#0f6f4c;font-size:11px;font-weight:820}.secondary-button,.primary-button,.ghost-button,.wide-button,.danger-button{border-radius:8px;justify-content:center;align-items:center;gap:8px;font-size:14px;font-weight:720;line-height:1;transition:transform .16s,border-color .16s,background .16s;display:inline-flex}.secondary-button{color:#17201b;background:#fff;border:1px solid #cfdcd5;height:38px;padding:0 14px}.primary-button{color:#fff;background:#0f8f5f;border:1px solid #0f8f5f;height:42px;padding:0 18px}.primary-button.light{color:#0f6f4c;background:#fff;border-color:#ffffff59}.primary-button:disabled{cursor:not-allowed;opacity:.72;transform:none}.ghost-button{color:#45534d;background:#fff;border:1px solid #dde6e1;min-height:38px;padding:0 13px}.wide-button{color:#17201b;background:#fff;border:1px solid #dde6e1;width:100%;height:42px}.danger-button{color:#fff;background:#dc2626;border:1px solid #dc2626;min-height:42px;padding:0 14px}.secondary-button:hover,.primary-button:hover,.ghost-button:hover,.wide-button:hover,.danger-button:hover{transform:translateY(-1px)}main{flex-direction:column;flex:1 0 auto;width:min(1520px,100%);margin:0 auto;padding:36px 40px;display:flex}.workspace-header{grid-template-columns:minmax(0,720px);align-items:center;gap:24px;margin-bottom:20px;display:grid}.workspace-header h1{color:#17201b;letter-spacing:0;margin:0;font-size:clamp(34px,4vw,50px);line-height:1.05}.workspace-header p{color:#66736d;margin:10px 0 0;font-size:16px}.share-status{color:#0f6f4c;margin-top:10px;font-size:13px;font-weight:760;display:inline-flex}.config-note{color:#8a560d;background:#fff8eb;border:1px solid #fde7bd;border-radius:8px;margin:0 0 18px;padding:12px 14px;font-size:14px;font-weight:620}.auth-reminder{color:#45534d;background:#f3faf6;border:1px solid #cfe6da;border-radius:8px;justify-content:space-between;align-items:center;gap:14px;margin:0 0 18px;padding:12px 14px;font-size:14px;line-height:1.45;display:flex}.auth-reminder strong{color:#0f6f4c}.stat-strip{grid-template-columns:repeat(4,1fr);gap:14px;margin:18px 0 20px;display:grid}.metric{color:#66736d;background:#fff;border:1px solid #dde6e1;border-radius:8px;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;min-height:60px;padding:0 16px;display:grid}.metric svg{color:#0f8f5f}.metric span{font-size:13px;font-weight:680}.metric strong{color:#17201b;font-size:20px}.learning-grid{grid-template-columns:300px minmax(0,1fr) 300px;align-items:start;gap:18px;display:grid}.chapter-rail,.question-panel,.progress-panel,.study-control-panel,.module{background:#fff;border:1px solid #dde6e1;border-radius:8px;box-shadow:0 14px 38px #233a2e0e;container-type:inline-size}.chapter-rail{padding:12px}.rail-title,.section-label{color:#66736d;letter-spacing:.02em;text-transform:uppercase;font-size:12px;font-weight:800}.rail-title{padding:6px 8px 10px}.chapter{color:#45534d;text-align:left;background:0 0;border:0;border-radius:8px;grid-template-columns:30px minmax(0,1fr) auto;align-items:center;gap:9px;width:100%;min-height:42px;padding:0 9px;display:grid}.chapter-icon{color:#0f8f5f;background:#eef6f1;border-radius:8px;place-items:center;width:28px;height:28px;display:grid}.chapter-name{text-overflow:ellipsis;white-space:nowrap;font-size:14px;font-weight:690;overflow:hidden}.chapter small{color:#8a9991;font-size:12px;font-weight:760}.chapter.active{color:#0f6f4c;background:#eef6f1}.chapter.active .chapter-icon{color:#fff;background:#0f8f5f}.question-panel{min-height:520px;padding:26px}.panel-heading{justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:18px;display:flex}.panel-heading.compact{align-items:center}.panel-heading h2,.module-heading h2{color:#17201b;margin:4px 0 0;font-size:22px;line-height:1.2}.soft-badge,.danger-badge{border-radius:999px;align-items:center;min-height:28px;padding:0 10px;font-size:12px;font-weight:820;display:inline-flex}.soft-badge{color:#0f6f4c;background:#eef6f1}.danger-badge{color:#dc2626;background:#fef2f2}.question-text{color:#17201b;margin:0 0 18px;font-size:22px;font-weight:760;line-height:1.38}.question-image{object-fit:contain;background:#f8faf9;border:1px solid #dde6e1;border-radius:8px;width:min(100%,440px);max-height:220px;margin:0 auto 18px;display:block}.question-image.compact{max-height:150px;margin:8px 0 0}.keyword-highlight{color:#17201b;background:#fff3bf;border-radius:5px;padding:0 3px}.answer-list{gap:10px;display:grid}.answer-option{color:#2a3731;text-align:left;background:#fff;border:1px solid #dde6e1;border-radius:8px;grid-template-columns:28px 1fr;align-items:center;gap:12px;min-height:52px;padding:10px 14px;font-size:15px;line-height:1.35;display:grid}.answer-option em{min-width:0;color:inherit;font-style:normal}.answer-option span{color:#0f6f4c;background:#eef6f1;border-radius:999px;place-items:center;width:28px;height:28px;font-size:13px;font-weight:820;display:grid}.answer-option.selected{background:#f3faf6;border-color:#0f8f5f}.answer-option.correct{border-color:#0f8f5f}.answer-option.wrong{background:#fff7f7;border-color:#ef4444}.answer-feedback{color:#45534d;background:#f3faf6;border:1px solid #cfe6da;border-radius:8px;gap:4px;margin-top:14px;padding:12px 14px;font-size:14px;line-height:1.45;display:grid}.answer-feedback strong{color:#0f6f4c}.panel-actions{align-items:center;gap:10px;margin-top:20px;display:flex}.progress-panel{padding:18px}.progress-ring{background:radial-gradient(circle at center, #fff 0 61%, transparent 62%), conic-gradient(#0f8f5f calc(var(--progress-percent,0) * 1%), #e5efe9 0);border-radius:50%;align-content:center;place-items:center;width:156px;height:156px;margin:16px auto;display:grid}.progress-ring strong{color:#17201b;font-size:34px;line-height:1}.progress-ring span{color:#66736d;font-size:13px;font-weight:720}.progress-list{gap:10px;margin:18px 0;display:grid}.progress-row{color:#66736d;border-bottom:1px solid #edf2ef;justify-content:space-between;gap:12px;padding-bottom:10px;font-size:14px;display:flex}.progress-row strong{color:#17201b}.module-grid{grid-template-columns:.95fr 1.3fr 1fr;gap:18px;margin-top:18px;display:grid}.module{min-height:280px;padding:18px;position:relative}.module.locked{overflow:hidden}.module-wide{grid-column:1/-1;min-height:auto}.module.locked>:not(.module-heading):not(.locked-note){opacity:.46}.module-heading{justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;display:flex}.module-heading>div{align-items:center;gap:10px;display:flex}.module-heading svg{color:#0f8f5f}.module-heading .ghost-button svg{color:currentColor}.module p{color:#45534d;margin:0 0 18px;font-size:15px;line-height:1.55}.exam-meta{gap:10px;display:grid}.exam-meta span{color:#66736d;align-items:center;gap:8px;font-size:14px;font-weight:690;display:inline-flex}.locked-note{color:#8a560d;background:#fff8eb;border:1px solid #fde7bd;border-radius:8px;align-items:center;gap:8px;margin-top:18px;padding:10px 12px;font-size:13px;font-weight:740;display:inline-flex}.media-row{grid-template-columns:1fr;gap:12px;display:grid}.sign-filter{flex-wrap:wrap;gap:8px;margin-bottom:12px;display:flex}.sign-filter span{color:#45534d;background:#f2f5f3;border-radius:999px;align-items:center;height:28px;padding:0 10px;font-size:12px;font-weight:740;display:inline-flex}.sign-grid{grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:10px;display:grid}.sign-card{min-width:0}.sign-image{color:#0f8f5f;background:#f8faf9;border:1px solid #dde6e1;border-radius:8px;place-items:center;height:74px;display:grid}.sign-image img{object-fit:contain;max-width:68px;max-height:68px}.sign-card span{color:#45534d;text-overflow:ellipsis;white-space:nowrap;margin-top:6px;font-size:12px;font-weight:690;line-height:1.25;display:block;overflow:hidden}.home-grid{grid-template-columns:minmax(0,1fr) 320px;align-items:stretch;gap:18px;display:grid}.home-primary,.home-progress,.study-side{background:#fff;border:1px solid #dde6e1;border-radius:8px;box-shadow:0 14px 38px #233a2e0e}.home-primary{align-content:space-between;gap:22px;min-height:360px;padding:26px;display:grid}.home-primary h2{color:#17201b;max-width:720px;margin:4px 0 10px;font-size:34px;line-height:1.15}.home-primary p{color:#45534d;max-width:740px;margin:0;font-size:16px;line-height:1.55}.home-actions{flex-wrap:wrap;gap:10px;display:flex}.home-guide-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.home-guide-card{background:#f8fbf9;border:1px solid #dde6e1;border-radius:8px;grid-template-columns:auto minmax(0,1fr);align-items:start;gap:10px;min-height:92px;padding:12px;display:grid}.guide-icon{color:#0f8f5f;background:#e6f3ec;border-radius:8px;place-items:center;width:34px;height:34px;display:grid}.home-guide-card strong{color:#17201b;margin-bottom:4px;font-size:14px;line-height:1.25;display:block}.home-guide-card span:last-child{color:#66736d;font-size:13px;line-height:1.38;display:block}.home-progress,.study-side{padding:18px}.ad-slot{width:100%;min-width:0;max-width:100%;box-shadow:none;color:#66736d;text-align:center;cursor:default;background:#fbfdfb;border:1px dashed #c9d6cf;border-radius:8px;gap:6px;padding:14px;display:grid;overflow:hidden}.ad-slot span{color:#8a9690;letter-spacing:.04em;text-transform:uppercase;font-size:11px;font-weight:800;line-height:1.2}.ad-slot strong{color:#45534d;overflow-wrap:anywhere;font-size:15px;line-height:1.3}.ad-slot small{color:#8a9690;overflow-wrap:anywhere;font-size:12px;line-height:1.35}.ad-slot-banner{place-content:center;min-height:92px;margin:18px 0}.ad-slot-adsense{text-align:center;min-width:min(100%,250px);display:block}.ad-slot-adsense .adsbygoogle{width:100%;min-width:min(100%,250px);min-height:90px;display:block!important}.ad-slot-unfilled{display:none}.ad-slot-sidebar,.ad-slot-native{place-content:center;min-height:160px}.home-modules{margin-top:18px}.study-screen{grid-template-columns:minmax(180px,.55fr) minmax(420px,1.35fr) minmax(280px,.85fr);align-items:start;gap:18px;display:grid}.study-rail,.study-question,.study-aside-stack{min-height:620px}.study-aside-stack{align-content:start;gap:14px;display:grid}.study-control-panel{padding:18px}.study-question{flex-direction:column;padding:28px;display:flex}.study-topline{justify-content:space-between;align-items:center;gap:16px;margin-bottom:20px;display:flex}.study-modes{background:#f8faf9;border:1px solid #dde6e1;border-radius:8px;gap:4px;padding:3px;display:inline-flex}.study-modes button{color:#66736d;white-space:nowrap;background:0 0;border:0;border-radius:6px;min-height:32px;padding:0 10px;font-size:12px;font-weight:780}.study-modes button.active{color:#0f6f4c;background:#fff;box-shadow:0 1px 4px #233a2e14}.study-counter{color:#66736d;margin-top:4px;font-size:13px;font-weight:720;display:block}.study-question-body{gap:0;display:grid}.study-actions{gap:10px;margin-top:0;display:grid}.study-nav-actions,.study-step-actions,.study-tool-actions{gap:10px;display:grid}.study-nav-actions{grid-template-columns:1fr}.study-step-actions,.study-tool-actions{grid-template-columns:repeat(2,minmax(0,1fr))}.study-nav-button,.study-tool-button{width:100%;min-width:0}.study-nav-button{min-height:44px;padding-inline:8px;font-weight:820}.study-tool-button{color:#45534d;white-space:normal;min-height:42px;padding:6px 8px;line-height:1.15}.study-tool-button svg,.study-nav-button svg{flex:none}.study-tool-button span,.study-nav-button span{min-width:0}.study-table-button,.study-home-button{width:100%}.question-sheet-backdrop{z-index:42;background:#17201b61;place-items:center;padding:22px;display:grid;position:fixed;inset:0}.question-sheet{background:#fff;border:1px solid #dde6e1;border-radius:12px;width:min(100%,620px);max-height:min(760px,100vh - 44px);display:grid;position:relative;overflow:hidden;box-shadow:0 24px 80px #17201b3d}.question-sheet-grabber{display:none}.question-sheet-header{border-bottom:1px solid #edf2ef;justify-content:space-between;align-items:flex-start;gap:16px;padding:18px 18px 14px;display:flex}.question-sheet-header .modal-close{flex:none;position:static}.question-sheet-header h2{color:#17201b;margin:4px 0 0;font-size:22px;line-height:1.2}.question-sheet-filters{border-bottom:1px solid #edf2ef;gap:8px;padding:12px 18px;display:flex;overflow-x:auto}.question-sheet-filters button{color:#45534d;white-space:nowrap;background:#fff;border:1px solid #dde6e1;border-radius:999px;min-height:34px;padding:0 12px;font-size:13px;font-weight:780}.question-sheet-filters button.active{color:#0f6f4c;background:#eef6f1;border-color:#cfe6da}.question-sheet-grid{grid-template-columns:repeat(auto-fill,minmax(44px,1fr));gap:10px;padding:18px;display:grid;overflow-y:auto}.question-number{aspect-ratio:1;color:#45534d;background:#fff;border:1px solid #dde6e1;border-radius:10px;place-items:center;min-height:44px;font-size:14px;font-weight:840;display:grid}.question-number.answered{color:#0f6f4c;background:#eef6f1;border-color:#cfe6da}.question-number.critical{color:#8a560d;background:#fff8eb;border-color:#fde7bd}.question-number.wrong{color:#dc2626;background:#fff7f7;border-color:#fecaca}.question-number.bookmarked{box-shadow:inset 0 -4px #0f8f5f}.question-number.active{color:#fff;background:#0f8f5f;border-color:#0f8f5f}.question-sheet-legend{color:#66736d;border-top:1px solid #edf2ef;flex-wrap:wrap;gap:10px 14px;padding:12px 18px 16px;font-size:12px;font-weight:720;display:flex}.question-sheet-legend span{align-items:center;gap:6px;display:inline-flex}.legend-dot{background:#dde6e1;border-radius:999px;width:10px;height:10px}.legend-dot.answered{background:#fff;border:2px solid #0f8f5f;box-shadow:0 0 0 2px #d7f0e5}.legend-dot.wrong{background:#dc2626}.legend-dot.critical{background:#f59e0b}.legend-dot.bookmarked{background:#17201b}.question-table-screen,.exam-lobby-screen{background:#fff;border:1px solid #dde6e1;border-radius:8px;padding:18px;box-shadow:0 14px 38px #233a2e0e}.question-table{gap:8px;display:grid}.question-table-head,.question-row{grid-template-columns:70px minmax(0,1.5fr) minmax(160px,.7fr) 100px;align-items:center;gap:12px;display:grid}.question-table-head{color:#66736d;text-transform:uppercase;padding:0 12px 6px;font-size:12px;font-weight:800}.question-row{color:#45534d;text-align:left;background:#fff;border:1px solid #edf2ef;border-radius:8px;min-height:56px;padding:10px 12px}.question-row:hover{background:#f8fbf9;border-color:#cfe6da}.question-row strong{color:#0f6f4c}.question-row span,.question-row small{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.question-row em{color:#0f6f4c;text-align:center;background:#eef6f1;border-radius:999px;padding:5px 8px;font-size:12px;font-style:normal;font-weight:780}.exam-lobby-grid{grid-template-columns:minmax(0,1fr) 320px;align-items:start;gap:18px;display:grid}.exam-set-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;display:grid}.exam-set-card{color:#45534d;text-align:left;background:#fff;border:1px solid #dde6e1;border-radius:8px;gap:6px;min-height:116px;padding:16px;display:grid}.exam-set-card strong{color:#17201b;font-size:20px}.exam-set-card span,.exam-set-card small,.empty-note{color:#66736d;font-size:13px;line-height:1.45}.exam-set-card.active,.exam-set-card:hover{background:#f3faf6;border-color:#0f8f5f}.exam-set-card.random{background:#f7fbf8;border-color:#9fcfbb}.exam-screen{gap:14px;display:grid}.exam-command-bar,.exam-question-card,.exam-palette-panel{background:#fff;border:1px solid #dde6e1;border-radius:8px;box-shadow:0 14px 38px #233a2e0e}.exam-command-bar{--exam-control-height:54px;grid-template-columns:minmax(180px,.75fr) minmax(340px,1.15fr) minmax(250px,auto);align-items:center;gap:16px;padding:14px 16px;display:grid}.exam-command-bar h2{color:#17201b;margin:4px 0 0;font-size:24px;line-height:1.15}.exam-command-center{gap:10px;display:grid}.exam-stat-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;display:grid}.exam-stat{height:var(--exam-control-height);min-height:var(--exam-control-height);background:#f8fbf9;border:1px solid #edf2ef;border-radius:8px;gap:3px;padding:9px 10px;display:grid}.exam-stat span{color:#66736d;font-size:12px;font-weight:760}.exam-stat strong{color:#17201b;font-size:16px;line-height:1.15}.exam-command-actions,.exam-step-actions{flex-wrap:wrap;justify-content:flex-end;gap:8px;display:flex}.exam-command-actions{align-content:center;align-items:center}.exam-command-actions .primary-button{height:var(--exam-control-height);min-height:var(--exam-control-height)}.exam-step-actions{border-bottom:1px solid #edf2ef;grid-template-columns:repeat(2,minmax(0,1fr));padding-bottom:12px;display:grid}.exam-timer{min-width:128px;height:var(--exam-control-height);min-height:var(--exam-control-height);color:#0f6f4c;background:#f3faf6;border:1px solid #cfe6da;border-radius:8px;align-content:center;gap:4px;padding:8px 12px;display:grid}.exam-timer div{align-items:center;gap:7px;display:inline-flex}.exam-timer svg{color:currentColor;flex:none}.exam-timer strong{color:#17201b;font-size:24px;line-height:1}.exam-timer span{color:#66736d;font-size:12px;font-weight:760;line-height:1.1}.exam-timer.steady{color:#0f8f5f;background:#f3faf6;border-color:#cfe6da}.exam-timer.warning{color:#d97706;background:#fff8eb;border-color:#fde68a}.exam-timer.critical{color:#dc2626;background:#fff7f7;border-color:#fecaca}.exam-timer svg{animation:1.15s ease-in-out infinite exam-clock-pulse}@keyframes exam-clock-pulse{0%,to{opacity:.42;transform:scale(.94)}50%{opacity:1;transform:scale(1)}}.exam-workspace{grid-template-columns:minmax(0,1fr) 292px;align-items:start;gap:14px;display:grid}.exam-question-card,.exam-palette-panel{padding:18px}.exam-progress-bar{background:#edf2ef;border-radius:999px;height:8px;margin-bottom:18px;overflow:hidden}.exam-progress-bar span{border-radius:inherit;background:#0f8f5f;height:100%;transition:width .18s;display:block}.exam-palette-panel{gap:14px;display:grid;position:sticky;top:16px}.exam-palette{grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;display:grid}.exam-palette button{color:#45534d;background:#fff;border:1px solid #dde6e1;border-radius:8px;place-items:center;min-height:42px;font-size:14px;font-weight:820;display:grid}.exam-palette button.answered{color:#0f6f4c;background:#eef6f1;border-color:#b9ddcd}.exam-palette button.active{color:#fff;background:#0f8f5f;border-color:#0f8f5f}.exam-palette-legend{color:#66736d;flex-wrap:wrap;gap:8px 12px;font-size:12px;font-weight:720;display:flex}.exam-palette-legend span{align-items:center;gap:6px;display:inline-flex}.legend-dot.active{background:#0f8f5f}.history-panel{background:#fff;border:1px solid #dde6e1;border-radius:8px;padding:18px}.history-list{gap:10px;margin-top:14px;display:grid}.history-row{border-bottom:1px solid #edf2ef;gap:4px;padding-bottom:10px;display:grid}.history-row strong{color:#17201b}.history-row span{color:#66736d;font-size:13px}.screen-tabs{background:#f8faf9;border:1px solid #dde6e1;border-radius:8px;gap:4px;margin-bottom:14px;padding:3px;display:inline-flex}.screen-tabs button{color:#66736d;background:0 0;border:0;border-radius:6px;min-height:36px;padding:0 14px;font-size:13px;font-weight:780}.screen-tabs button.active{color:#0f6f4c;background:#fff;box-shadow:0 1px 4px #233a2e14}.signs-screen{padding:18px}.screen-toolbar{justify-content:space-between;align-items:flex-start;gap:18px;margin-bottom:18px;display:flex}.toolbar-actions,.filter-row{flex-wrap:wrap;justify-content:flex-end;gap:8px;display:flex}.filter-row button{color:#45534d;background:#fff;border:1px solid #dde6e1;border-radius:8px;min-height:34px;padding:0 12px;font-size:13px;font-weight:760}.filter-row button.active,.filter-row button:hover{color:#0f6f4c;background:#eef6f1;border-color:#cfe6da}.sign-catalog{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;display:grid}.sign-result{border:1px solid #edf2ef;border-radius:8px;grid-template-columns:74px 1fr;align-items:center;gap:12px;min-width:0;padding:10px;display:grid}.penalties-screen{padding:18px}.penalty-preview-list{gap:8px;display:grid}.penalty-preview-list span{color:#66736d;border-top:1px solid #edf2ef;gap:2px;padding-top:8px;font-size:13px;line-height:1.35;display:grid}.penalty-preview-list strong{color:#17201b}.penalty-catalog{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;display:grid}.penalty-card{background:#fff;border:1px solid #dde6e1;border-radius:8px;align-content:start;gap:10px;padding:16px;display:grid}.penalty-card h3{color:#17201b;margin:0;font-size:18px;line-height:1.25}.penalty-card>strong{color:#0f6f4c;font-size:16px;line-height:1.35}.penalty-card p{color:#66736d;margin:0;font-size:14px;line-height:1.45}.legal-note{color:#8a560d;margin:14px 0 0;font-size:13px;font-weight:700;line-height:1.45}.sign-image.large{height:74px}.sign-result strong,.sign-result span{text-overflow:ellipsis;display:block;overflow:hidden}.sign-result strong{color:#17201b;font-size:14px;line-height:1.3}.sign-result span{color:#66736d;white-space:nowrap;margin-top:4px;font-size:12px;font-weight:720}.profile-screen{display:grid}.profile-grid{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);align-items:start;gap:18px;display:grid}.profile-card{background:#fff;border:1px solid #dde6e1;border-radius:8px;padding:18px;box-shadow:0 14px 38px #233a2e0e}.profile-account-card,.profile-danger-card{min-height:280px}.profile-identity{background:#f8fbf9;border:1px solid #edf2ef;border-radius:8px;grid-template-columns:58px minmax(0,1fr);align-items:center;gap:12px;padding:12px;display:grid}.profile-avatar{object-fit:cover;border-radius:8px;width:58px;height:58px}.profile-avatar-fallback{color:#fff;background:#0f8f5f;place-items:center;font-size:22px;font-weight:840;display:grid}.profile-identity div{gap:3px;min-width:0;display:grid}.profile-identity strong,.profile-identity span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.profile-identity strong{color:#17201b;font-size:18px}.profile-identity span{color:#66736d;font-size:13px;font-weight:650}.profile-stat-grid,.profile-license-grid{gap:10px;display:grid}.profile-stat-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.profile-stat-grid div{background:#f8fbf9;border:1px solid #edf2ef;border-radius:8px;gap:5px;min-height:86px;padding:12px;display:grid}.profile-stat-grid span{color:#66736d;font-size:12px;font-weight:740}.profile-stat-grid strong{color:#17201b;font-size:22px;line-height:1.1}.profile-license-grid{grid-template-columns:repeat(5,minmax(0,1fr))}.profile-license-grid button{color:#45534d;text-align:left;background:#fff;border:1px solid #dde6e1;border-radius:8px;gap:5px;min-height:76px;padding:10px;display:grid}.profile-license-grid button.active,.profile-license-grid button:hover{background:#f3faf6;border-color:#0f8f5f}.profile-license-grid strong{color:#17201b;font-size:18px}.profile-license-grid span{color:#66736d;font-size:12px;line-height:1.35}.profile-danger-card p{color:#66736d;margin:0 0 14px;font-size:14px;line-height:1.5}.profile-status{color:#0f6f4c;background:#f3faf6;border:1px solid #cfe6da;border-radius:8px;margin-bottom:12px;padding:10px 12px;font-size:13px;font-weight:720}.profile-actions{flex-wrap:wrap;gap:10px;display:flex}.site-footer{color:#66736d;border-top:1px solid #dde6e1;gap:20px;margin-top:auto;padding:24px 0 4px;font-size:13px;display:grid}.footer-brand-block{justify-items:start;gap:10px;display:grid}.footer-brand-heading{align-items:flex-start;gap:12px;display:flex}.site-footer img{object-fit:cover;border-radius:8px;width:38px;height:38px}.site-footer p{gap:3px;max-width:760px;margin:0;display:grid}.site-footer strong{color:#17201b}.site-footer em{color:#0f6f4c;font-style:normal;font-weight:760}.site-footer span{color:#66736d}.footer-brand-description{max-width:100%}.footer-columns{grid-template-columns:minmax(260px,1.4fr) minmax(210px,.9fr) minmax(160px,.75fr) minmax(210px,.9fr);align-items:start;gap:22px;display:grid}.site-footer nav{align-content:start;gap:8px;display:grid}.site-footer nav strong{color:#17201b;font-size:13px}.footer-store-links{gap:10px}.site-footer .store-badge{color:#fff;background:#050505;border:1px solid #ffffffb8;border-radius:9px;grid-template-columns:42px 1fr;align-items:center;gap:10px;width:198px;height:58px;padding:7px 14px 7px 12px;display:grid;box-shadow:inset 0 0 0 1px #ffffff29}.site-footer .store-badge:hover{color:#fff;background:#121212}.store-badge-icon{stroke-width:2.2px;width:32px;height:32px}.store-badge span:last-child{gap:1px;line-height:1;display:grid}.site-footer .store-badge small{color:#fff;letter-spacing:0;font-size:10px;font-weight:650}.site-footer .store-badge strong{color:#fff;letter-spacing:0;white-space:nowrap;font-size:22px;font-weight:860}.google-play-icon{clip-path:polygon(0 0,100% 50%,0 100%,0 0);filter:drop-shadow(0 0 #ffffff03);background:linear-gradient(135deg,#2ec6ff 0 28%,#22d071 28% 51%,#ffd24d 51% 72%,#ff5f52 72% 100%);width:30px;height:32px;display:block}.site-footer a{color:#0f6f4c;text-align:left;background:0 0;border:0;width:fit-content;padding:0;font-weight:720;text-decoration:none}.site-footer a:hover{text-decoration:underline}.footer-social-block{border-top:1px solid #e7efeb;gap:8px;margin-top:8px;padding-top:10px;display:grid}.footer-social-block>span{color:#66736d;font-size:12px;font-weight:760}.footer-social-links{flex-wrap:wrap;gap:8px;display:flex}.footer-social-links a{color:#0f6f4c;background:#fff;border:1px solid #d6e4dd;border-radius:999px;place-items:center;width:34px;height:34px;transition:background .16s,border-color .16s,color .16s,transform .16s;display:inline-grid}.footer-social-links a:hover{color:#fff;background:#0f8f5f;border-color:#0f8f5f;text-decoration:none;transform:translateY(-1px)}.modal-backdrop{z-index:40;background:#17201b6b;place-items:center;padding:20px;display:grid;position:fixed;inset:0}.auth-modal{background:#fff;border:1px solid #dde6e1;border-radius:8px;width:min(100%,440px);padding:26px;position:relative;box-shadow:0 24px 80px #17201b38}.modal-close{color:#45534d;background:#fff;border:1px solid #dde6e1;border-radius:8px;place-items:center;width:34px;height:34px;display:grid;position:absolute;top:12px;right:12px}.modal-icon{color:#0f6f4c;background:#eef6f1;border-radius:8px;place-items:center;width:44px;height:44px;display:grid}.auth-modal h2{color:#17201b;margin:16px 0 8px;font-size:24px;line-height:1.2}.auth-modal p{color:#66736d;margin:0;font-size:15px;line-height:1.5}.social-auth{gap:10px;margin-top:20px;display:grid}.social-button{color:#17201b;background:#fff;border:1px solid #cfdcd5;border-radius:8px;justify-content:center;align-items:center;gap:10px;min-height:44px;font-size:14px;font-weight:760;display:flex}.social-button:disabled{cursor:not-allowed;opacity:.72}.social-mark{color:#fff;border-radius:999px;place-items:center;width:24px;height:24px;font-size:15px;font-weight:860;display:grid}.social-mark.google{background:#4285f4}.social-mark.facebook{background:#1877f2;font-family:Arial,sans-serif;font-size:18px}.auth-divider{color:#8a9991;text-transform:uppercase;grid-template-columns:1fr auto 1fr;align-items:center;gap:10px;margin:16px 0;font-size:12px;font-weight:740;display:grid}.auth-divider:before,.auth-divider:after{content:"";background:#dde6e1;height:1px}.auth-tabs{background:#f8faf9;border:1px solid #dde6e1;border-radius:8px;grid-template-columns:1fr 1fr;padding:3px;display:grid}.auth-tabs button{color:#66736d;background:0 0;border:0;border-radius:6px;min-height:36px;font-size:13px;font-weight:780}.auth-tabs button.active{color:#0f6f4c;background:#fff;box-shadow:0 1px 4px #233a2e14}.auth-form{gap:14px;margin-top:16px;display:grid}.auth-form label{color:#45534d;gap:8px;font-size:13px;font-weight:760;display:grid}.email-field{color:#66736d;border:1px solid #cfdcd5;border-radius:8px;align-items:center;gap:10px;height:46px;padding:0 12px;display:flex}.email-field input{color:#17201b;border:0;outline:0;width:100%}.auth-status{color:#0f6f4c;background:#f3faf6;border-radius:8px;margin-top:14px;padding:10px 12px;font-size:13px;font-weight:720;line-height:1.45}.study-tip-card{color:#7a4b08;background:#fffaf0;border:1px solid #fde7bd;border-radius:8px;gap:4px;margin-top:12px;padding:12px 14px;font-size:14px;line-height:1.45;display:grid}.study-tip-card strong{color:#8a560d}.license-modal{width:min(100%,560px)}.license-switch-modal{width:min(100%,680px)}.license-switch-grid{margin-top:18px}.license-picker-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:18px 0 14px;display:grid}.license-picker-grid button{color:#45534d;text-align:left;background:#fff;border:1px solid #dde6e1;border-radius:8px;gap:4px;min-height:76px;padding:12px;display:grid}.license-picker-grid button:hover{background:#f3faf6;border-color:#0f8f5f}.license-picker-grid strong{color:#17201b;font-size:18px}.license-picker-grid span{color:#66736d;font-size:12px;line-height:1.35}@media (width<=1180px) and (width>=901px){.mobile-download-panel{z-index:30;background:#f3faf6;border-bottom:1px solid #cfe6da;justify-content:space-between;align-items:center;gap:14px;padding:10px 28px;display:flex;position:sticky;top:0}main{padding:32px 28px}.workspace-header,.learning-grid,.module-grid,.home-grid,.study-screen{grid-template-columns:1fr}.chapter-rail{grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.rail-title{grid-column:1/-1}.question-panel,.progress-panel,.module,.study-rail,.study-question,.study-side{min-height:auto}.exam-screen,.exam-lobby-grid,.profile-grid,.penalty-catalog{grid-template-columns:1fr}.exam-set-grid,.sign-catalog{grid-template-columns:repeat(2,minmax(0,1fr))}.review-answer-grid{grid-template-columns:1fr}.profile-license-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (width<=900px){.app-shell,.app-shell.sidebar-compact{padding-left:0}.mobile-appbar{z-index:35;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#fffffff5;border-bottom:1px solid #dde6e1;justify-content:space-between;align-items:center;gap:12px;padding:12px 20px;display:flex;position:sticky;top:0}.mobile-appbar .brand small{display:block}.mobile-menu-button{color:#17201b;background:#fff;border:1px solid #dde6e1;border-radius:8px;justify-content:center;align-items:center;gap:7px;min-height:38px;padding:0 12px;font-size:13px;font-weight:820;display:inline-flex}.mobile-drawer-backdrop{z-index:45;background:#17201b5c;border:0;padding:0;display:block;position:fixed;inset:0}.mobile-download-panel{z-index:30;background:#f3faf6;border-bottom:1px solid #cfe6da;justify-content:space-between;align-items:center;gap:12px;padding:10px 20px;display:flex;position:sticky;top:0}.topbar{z-index:50;border-bottom:0;border-right:1px solid #dde6e1;grid-template-rows:auto auto minmax(0,1fr);gap:10px;width:min(86vw,320px);padding:18px;transition:transform .18s;position:fixed;inset:0 auto 0 0;overflow-y:auto;transform:translate(-105%)}.topbar.compact{justify-items:stretch;width:min(86vw,320px);padding:18px}.topbar.compact .brand span,.topbar.compact .topbar-actions,.topbar.compact .nav-label,.topbar.compact .learning-status-panel,.topbar.compact .account-actions>.secondary-button,.topbar.compact .account-copy{display:grid}.topbar.compact .learning-status-panel{background:#f8fbf9;border:1px solid #d6e4dd;justify-items:stretch;width:100%;padding:12px}.topbar.compact .learning-status-panel>:not(.compact-progress-ring){display:revert}.topbar.compact .status-license-select,.topbar.compact .status-meta,.topbar.compact .status-review-line{display:flex}.topbar.compact .status-meter{display:grid}.topbar.compact .status-bar{display:block}.topbar.compact .compact-progress-ring{display:none}.topbar.compact .account-actions{justify-items:stretch}.topbar.compact .topbar-actions>.secondary-button{gap:8px;width:100%;min-height:44px;padding:0 14px;font-size:14px}.topbar.compact .account-card{grid-template-columns:34px minmax(0,1fr);place-items:center start;width:100%;height:auto;padding:8px}.topbar.compact .sidebar-toggle,.sidebar-toggle{display:none}.topbar.open{transform:translate(0)}.mobile-drawer-close{color:#45534d;background:#fff;border:1px solid #dde6e1;border-radius:8px;place-items:center;width:34px;height:34px;display:grid;position:absolute;top:14px;right:14px}.main-nav{margin-top:18px;display:grid;overflow:visible}.main-nav a{white-space:nowrap;justify-content:flex-start;min-height:42px}.topbar.compact .main-nav a{justify-content:flex-start;padding:0 13px}.topbar.compact .main-nav a>svg{width:13px;height:13px;position:static}.topbar-actions{align-items:stretch;display:grid}.learning-status-panel{width:100%}.topbar>.brand small{display:none}main{padding:24px 20px}.workspace-header,.learning-grid,.module-grid,.home-grid,.study-screen,.exam-workspace,.exam-lobby-grid,.profile-grid{grid-template-columns:1fr}.exam-command-bar{grid-template-columns:1fr;align-items:stretch}.exam-command-actions,.exam-step-actions{justify-content:flex-start}.footer-columns{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-store-links{min-width:0}.site-footer .store-badge{grid-template-columns:30px minmax(0,1fr);gap:8px;width:100%;min-width:0;padding:7px 10px}.store-badge-icon{width:28px;height:28px}.site-footer .store-badge strong{font-size:clamp(16px,4vw,20px)}.chapter-rail{grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.rail-title{grid-column:1/-1}.sign-catalog,.penalty-catalog,.profile-stat-grid,.profile-license-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=720px){.mobile-download-panel{flex-direction:column;align-items:stretch}.mobile-download-copy strong,.mobile-download-copy span:last-child{white-space:normal}.mobile-download-actions{grid-template-columns:repeat(2,minmax(0,1fr));width:100%;display:grid}.topbar-actions{flex-wrap:wrap;justify-content:flex-start}.learning-status-panel,.account-actions{width:100%}.auth-reminder{flex-direction:column;align-items:stretch}.secondary-button{width:100%}.workspace-header h1{font-size:34px}.stat-strip,.chapter-rail,.home-guide-grid,.media-row,.sign-grid{grid-template-columns:1fr}.metric{min-height:54px}.profile-stat-grid,.profile-license-grid{grid-template-columns:1fr}.question-panel,.progress-panel,.module,.home-primary,.home-progress,.study-question,.study-side,.exam-command-bar,.exam-question-card,.exam-palette-panel,.question-table-screen,.exam-lobby-screen,.history-panel,.signs-screen{padding:16px}.question-panel,.module{min-height:auto}.ad-slot{padding:12px}.ad-slot-banner,.ad-slot-sidebar,.ad-slot-native{min-height:88px}.question-text{font-size:18px}.panel-actions,.module-heading,.study-topline,.home-actions{flex-direction:column;align-items:stretch}.panel-actions>*,.exam-command-actions>*,.exam-step-actions>*,.module-heading>button,.home-actions>*{width:100%}.study-nav-actions{grid-template-columns:1fr}.study-step-actions{grid-template-columns:repeat(2,minmax(0,1fr))}.study-actions{margin-top:20px;padding-top:0}.study-tool-actions{grid-template-columns:repeat(2,minmax(0,1fr))}.question-sheet-backdrop{align-items:end;padding:0}.question-sheet{border-bottom:0;border-left:0;border-right:0;border-radius:18px 18px 0 0;width:100%;max-height:min(82vh,720px)}.question-sheet-grabber{background:#cbd8d2;border-radius:999px;justify-self:center;width:42px;height:4px;margin-top:10px;display:block}.question-sheet-header{padding:12px 16px 14px}.question-sheet-header h2{font-size:20px}.question-sheet-filters{padding:10px 16px}.question-sheet-grid{grid-template-columns:repeat(auto-fill,minmax(42px,1fr));gap:8px;padding:16px}.question-number{border-radius:9px;min-height:42px}.question-sheet-legend{padding:10px 16px 14px}.home-primary h2{font-size:26px}.study-modes{width:100%;overflow-x:auto}.exam-stat-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.exam-stat{height:var(--exam-control-height);min-height:var(--exam-control-height);padding:8px}.exam-stat strong{font-size:14px}.exam-command-actions{justify-content:flex-end;display:flex}.exam-step-actions{grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.exam-command-actions .primary-button,.exam-command-actions .ghost-button,.exam-step-actions .primary-button,.exam-step-actions .ghost-button{white-space:nowrap;gap:4px;padding:0 6px;font-size:12px}.exam-command-actions svg,.exam-step-actions svg{width:14px;height:14px}.exam-command-actions>*{width:auto}.exam-command-actions .primary-button{flex:1}.exam-command-actions .exam-timer{flex:none;min-width:126px}.exam-palette-panel{position:static}.exam-palette{grid-template-columns:repeat(5,minmax(0,1fr))}.result-hero,.review-answer-grid{grid-template-columns:1fr}.video-stage{min-height:320px}.screen-toolbar{flex-direction:column;align-items:stretch}.filter-row{justify-content:flex-start}.sign-catalog,.penalty-catalog{grid-template-columns:1fr}.result-score{width:92px;height:92px}.question-table-head{display:none}.question-row{grid-template-columns:52px 1fr}.question-row small,.question-row em{grid-column:2}.exam-set-grid,.license-picker-grid{grid-template-columns:1fr}.screen-tabs{grid-template-columns:1fr;width:100%;display:grid}}@media (width<=900px){.study-rail{grid-template-columns:none;min-height:0;padding:12px 12px 10px;display:grid;overflow:hidden}.study-rail .rail-title{padding:0 2px 10px}.study-rail .chapter{background:#fff;border:1px solid #dde6e1;grid-template-columns:28px minmax(0,auto) auto;width:auto;min-width:178px;min-height:40px;padding:0 10px;display:inline-grid}.study-rail .chapter.active{background:#eef6f1;border-color:#b9ddca}.study-rail{overscroll-behavior-x:contain;scrollbar-width:none;grid-auto-columns:max-content;grid-auto-flow:column;gap:8px;overflow-x:auto}.study-rail::-webkit-scrollbar{display:none}.study-rail .rail-title{z-index:1;background:#fff;align-self:center;min-width:max-content;padding-right:8px;position:sticky;left:0}.study-rail .chapter-name{max-width:132px}.study-screen>.study-side{align-self:start;height:auto;min-height:0}}
