@import"https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;600;700;800&display=swap";:root{--bg-0: #070809;--bg-1: #0b0d10;--bg-2: #0f1215;--bg-3: #131619;--bg-4: #181b1f;--b-0: rgba(255, 255, 255, .05);--b-1: rgba(255, 255, 255, .09);--b-2: rgba(255, 255, 255, .15);--b-3: rgba(255, 255, 255, .24);--t-0: #ffffff;--t-1: rgba(255, 255, 255, .82);--t-2: rgba(255, 255, 255, .45);--t-3: rgba(255, 255, 255, .28);--g-0: #c8ff3c;--g-1: #4ade80;--g-2: #34d399;--g-0-dim: rgba(200, 255, 60, .1);--g-0-glow: rgba(200, 255, 60, .22);--g-1-dim: rgba(74, 222, 128, .1);--g-1-glow: rgba(74, 222, 128, .2);--g-2-dim: rgba(52, 211, 153, .1);--r-0: #ff5f57;--r-0-dim: rgba(255, 95, 87, .1);--r-0-glow: rgba(255, 95, 87, .18);--y-0: #facc15;--y-0-dim: rgba(250, 204, 21, .1);--sp-1: 4px;--sp-2: 8px;--sp-3: 12px;--sp-4: 16px;--sp-5: 20px;--sp-6: 24px;--sp-7: 32px;--sp-8: 40px;--sp-9: 56px;--rad-s: 4px;--rad-m: 8px;--rad-l: 12px;--rad-xl: 18px;--rad-pill: 999px;--shadow-1: 0 4px 12px rgba(0, 0, 0, .25);--shadow-2: 0 12px 32px rgba(0, 0, 0, .35);--shadow-3: 0 24px 60px rgba(0, 0, 0, .45);--shadow-glow-lime: 0 0 0 1px var(--g-0-glow), 0 8px 28px rgba(200, 255, 60, .18);--shadow-glow-green: 0 0 0 1px var(--g-1-glow), 0 8px 28px rgba(74, 222, 128, .18);--z-topnav: 30;--z-drawer: 60;--z-modal: 80;--z-impersonation: 95;--ease-out: cubic-bezier(.2, .8, .2, 1);--dur-fast: .12s;--dur-base: .18s;--dur-slow: .24s;--mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;font-family:var(--mono);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;color-scheme:dark;color:var(--t-1);background:var(--bg-0)}@keyframes fadeUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes blink{0%,49%{opacity:1}50%,to{opacity:0}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes 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ease}a:hover{color:var(--g-0);border-bottom-color:var(--g-0)}button,input,textarea,select{font:inherit;font-family:var(--mono);color:var(--t-0)}button{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid var(--b-2);border-radius:8px;background:var(--g-0);color:#000;cursor:pointer;font-weight:700;letter-spacing:.02em;padding:.65rem 1.05rem;transition:background .14s ease,box-shadow .14s ease,transform .14s ease,border-color .14s ease}button:hover:not(:disabled){background:#d6ff5c;box-shadow:0 6px 22px #c8ff3c38;transform:translateY(-1px)}button:active:not(:disabled){transform:translateY(0)}button:focus-visible{outline:2px solid var(--g-0);outline-offset:3px}button:disabled,input:disabled,textarea:disabled,select:disabled{cursor:not-allowed;opacity:.5}button.secondary-button{background:transparent;color:var(--t-0);border:1px solid var(--b-2)}button.secondary-button:hover:not(:disabled){background:var(--bg-3);border-color:var(--b-3);box-shadow:none}button.danger-button{background:transparent;color:var(--r-0);border:1px solid var(--r-0-glow)}button.danger-button:hover:not(:disabled){background:var(--r-0-dim);box-shadow:none;border-color:var(--r-0)}button.ghost-button{background:transparent;color:var(--t-2);border:1px solid transparent}button.ghost-button:hover:not(:disabled){color:var(--t-0);background:var(--bg-3);box-shadow:none}input,textarea,select{width:100%;background:var(--bg-1);border:1px solid var(--b-1);border-radius:8px;padding:.6rem .75rem;font-size:13px;transition:border-color .14s ease,background .14s ease}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--g-1);background:var(--bg-2)}input::placeholder,textarea::placeholder{color:var(--t-3)}textarea{resize:vertical;min-height:8rem;line-height:1.5}h1,h2,h3,h4,h5,h6{color:var(--t-0);font-weight:700;letter-spacing:-.01em;line-height:1.2}h1{font-size:28px}h2{font-size:18px}h3{font-size:16px}h4{font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--t-2)}p{color:var(--t-1)}small{color:var(--t-3);font-size:11px;letter-spacing:.04em}pre{background:var(--bg-1);border:1px solid var(--b-1);border-radius:8px;padding:.8rem .95rem;font-family:var(--mono);font-size:12.5px;color:var(--t-0);overflow-x:auto;white-space:pre-wrap;word-break:break-word}.app-shell{min-height:100vh;padding:28px 24px 56px;max-width:1200px;margin:0 auto;display:flex;flex-direction:column;gap:22px}.hero-card{background:var(--bg-1);border:1px solid var(--b-1);border-radius:16px;padding:28px 32px;display:flex;flex-direction:column;gap:22px;box-shadow:0 24px 60px #00000073;animation:fadeUp .24s ease both}.hero-card.compact{background:transparent;border:none;padding:0;gap:16px;box-shadow:none}.hero-header{display:flex;align-items:flex-start;justify-content:space-between;gap:24px}.eyebrow{font-size:10px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--t-3);margin-bottom:6px}.lede{color:var(--t-2);font-size:13px;max-width:740px}.action-row{display:flex;flex-wrap:wrap;gap:10px}.action-row button{padding:.6rem .95rem;font-size:12px}.topnav{display:flex;align-items:center;justify-content:space-between;gap:16px;background:#0f1215a6;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid var(--b-1);border-radius:12px;padding:12px 18px;animation:fadeUp .24s ease both;position:sticky;top:14px;z-index:20}.topnav .brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:16px;color:var(--g-0)}.topnav .brand:after{content:"|";color:var(--g-1);animation:blink 1.1s steps(1) infinite}.topnav-tabs{display:flex;gap:4px}.topnav-tabs button{background:transparent;border:1px solid transparent;color:var(--t-2);padding:6px 12px;font-size:12px;font-weight:500;border-radius:6px;text-transform:none;letter-spacing:.02em}.topnav-tabs button:hover:not(:disabled){color:var(--t-0);background:var(--bg-3);box-shadow:none}.topnav-tabs button.active-tab,.topnav-tabs button[aria-current=page]{background:var(--g-0-dim);border-color:var(--g-0-glow);color:var(--g-0)}.topnav-meta{display:flex;align-items:center;gap:14px;font-size:11px;color:var(--t-2)}.topnav-meta .chip{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--b-1);border-radius:999px;padding:4px 10px;background:var(--bg-2)}.topnav-meta .chip.streak{color:var(--g-0);border-color:var(--g-0-glow)}.topnav-meta .chip.limit{color:var(--g-1);border-color:#4ade8040}.topnav-meta 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textarea{font-size:12.5px;line-height:1.45}input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;background:var(--bg-3);border:1px solid var(--b-1);border-radius:999px;height:8px;padding:0;width:100%}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:18px;height:18px;border-radius:50%;background:var(--g-0);border:1px solid #000;box-shadow:0 0 0 4px var(--g-0-dim);cursor:pointer}input[type=range]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--g-0);border:1px solid #000;cursor:pointer}.topic-chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:-6px}.topic-chips .topic-chip{background:transparent;color:var(--t-2);border:1px solid var(--b-1);border-radius:999px;padding:4px 12px;font-size:11px;font-weight:500;letter-spacing:.02em;text-transform:none}.topic-chips 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1.2rem;font-size:13px}.visually-hidden{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}.auth-panel{display:flex;flex-direction:column;gap:14px;max-width:460px;margin:0 auto;width:100%;background:var(--bg-2);border:1px solid var(--b-1);border-radius:14px;padding:22px 24px}.mode-switch{display:flex;gap:6px;border:1px solid var(--b-1);background:var(--bg-1);padding:4px;border-radius:10px;align-self:flex-start}.mode-switch button{flex:1;background:transparent;color:var(--t-2);border:1px solid transparent;padding:6px 14px;font-size:12px;letter-spacing:.02em}.mode-switch button.active{background:var(--g-0-dim);border-color:var(--g-0-glow);color:var(--g-0);box-shadow:none}.mode-switch button:hover:not(:disabled):not(.active){color:var(--t-0);background:var(--bg-3);box-shadow:none}.workspace-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(280px,.9fr);gap:18px;align-items:start}.workspace-grid>.profile-card{grid-column:1 / -1}.workspace-grid>.history-panel{grid-column:2 / 3;grid-row:2 / span 5;position:sticky;top:76px;max-height:calc(100vh - 100px);overflow-y:auto}.profile-card{background:linear-gradient(135deg,var(--bg-2) 0%,var(--bg-3) 100%);border:1px solid var(--b-1);border-radius:14px;padding:20px 22px;display:flex;flex-direction:column;gap:16px;position:relative;overflow:hidden}.profile-card:after{content:"";position:absolute;inset:-40% -40% auto auto;width:220px;height:220px;background:radial-gradient(closest-side,var(--g-0-dim),transparent);pointer-events:none}.profile-card h2{font-size:24px;font-weight:700;letter-spacing:-.01em}.current-task-panel{display:flex;flex-direction:column;gap:14px}.task-card{display:flex;flex-direction:column;gap:16px}.task-heading-row{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.task-heading-row h3{font-size:18px;color:var(--t-0);font-weight:700}.badge-row{display:inline-flex;flex-wrap:wrap;gap:6px}.badge{display:inline-flex;align-items:center;font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;font-weight:700;padding:4px 9px;border-radius:999px;background:var(--bg-3);border:1px solid var(--b-1);color:var(--t-3)}.badge.saved{background:var(--g-0-dim);border-color:var(--g-0-glow);color:var(--g-0)}.badge.solved{background:var(--g-1-dim);border-color:var(--g-1-glow);color:var(--g-1)}.text-block{display:flex;flex-direction:column;gap:8px;background:var(--bg-1);border:1px solid var(--b-1);border-radius:10px;padding:14px 16px}.text-block h4{color:var(--t-3)}.text-block p{white-space:pre-wrap;color:var(--t-1);font-size:13px}.metadata-list{display:grid;grid-template-columns:max-content 1fr;gap:4px 16px;font-size:12px;color:var(--t-1)}.metadata-list dt{color:var(--t-3);text-transform:uppercase;font-size:10px;letter-spacing:.12em}.metadata-list dd{color:var(--t-1)}.result-panel h4{margin-bottom:6px}.result-panel p{white-space:pre-wrap;font-size:12.5px;margin-top:8px}.history-list{list-style:none;display:flex;flex-direction:column;gap:8px}.history-item{width:100%;text-align:left;background:var(--bg-1);border:1px solid var(--b-1);border-radius:10px;padding:10px 12px;color:var(--t-1);display:flex;align-items:stretch;justify-content:space-between;gap:10px;cursor:pointer;font-weight:500;transition:border-color .14s ease,background .14s ease}.history-item:hover:not(:disabled){background:var(--bg-3);border-color:var(--b-2);box-shadow:none;transform:none}.history-item.active-history{background:var(--g-0-dim);border-color:var(--g-0-glow)}.history-item.active-history strong{color:var(--g-0)}.history-item>span:first-child{display:flex;flex-direction:column;gap:2px}.history-item strong{color:var(--t-0);font-size:12.5px;letter-spacing:-.005em}.history-item small{font-size:10.5px;color:var(--t-3)}.stats-dashboard{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px;align-items:start}.stats-dashboard>.profile-card{grid-column:1 / -1}.stats-dashboard>.stats-panel{grid-column:1 / -1}.stats-dashboard>.activity-panel{grid-column:1 / -1}.stats-metric-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px}.stats-metric-grid>div{background:var(--bg-1);border:1px solid var(--b-1);border-radius:10px;padding:12px 14px}.stats-metric-grid 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button:before{content:"?";width:18px;height:18px;border-radius:50%;background:#0000002e;color:#000;display:inline-flex;align-items:center;justify-content:center;font-weight:800;font-size:11px}.tutor-cta button:hover:not(:disabled){background:#d6ff5c;border-color:#d6ff5c;box-shadow:var(--shadow-glow-lime);transform:translateY(-1px)}.code-editor{border-radius:var(--rad-m)!important;border-color:var(--b-1)!important;background:var(--bg-1)!important;box-shadow:inset 0 0 0 1px var(--b-0)}.run-panel{border-radius:var(--rad-l);padding:var(--sp-4)}.run-panel-pre{background:#050607;border:1px solid var(--b-1);border-radius:var(--rad-m);padding:var(--sp-3);font-size:12.5px;color:var(--t-1);font-family:var(--mono);line-height:1.55}.run-panel-pre-error{color:var(--r-0)}.run-panel-chip{border-radius:var(--rad-pill);font-weight:600}.history-list{gap:var(--sp-2)}.history-item{border-radius:var(--rad-m);padding:var(--sp-3);transition:border-color var(--dur-fast) var(--ease-out),background var(--dur-fast) var(--ease-out),transform var(--dur-fast) var(--ease-out)}.history-item:hover:not(:disabled){transform:translate(2px)}.stats-dashboard{gap:var(--sp-5)}.stats-metric-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--sp-3)}.stats-metric-grid>div{padding:var(--sp-4);border-radius:var(--rad-l);transition:border-color var(--dur-base) var(--ease-out),transform var(--dur-base) var(--ease-out)}.stats-metric-grid>div:hover{border-color:var(--g-1-glow);transform:translateY(-1px)}.stats-metric-grid dd{font-size:24px;color:var(--t-0)}.heatmap-wrap{border-radius:var(--rad-l);padding:var(--sp-4)}.heatmap-cell{border-radius:var(--rad-s)}.heatmap-cell.l1{background:#4ade8038;border-color:#4ade8042}.heatmap-cell.l2{background:#4ade8070;border-color:#4ade807a}.heatmap-cell.l3{background:#4ade80b3;border-color:#4ade80bd}.heatmap-cell.l4{background:var(--g-1);border-color:var(--g-1);box-shadow:0 0 6px var(--g-1-glow)}.skill-map-grid{gap:var(--sp-4)}.skill-node{border:1px solid 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var(--sp-7);box-shadow:var(--shadow-2)}.catalog-header{gap:var(--sp-4);margin-bottom:var(--sp-5)}.catalog-header h1{font-size:32px;letter-spacing:-.015em}.catalog-filters{gap:var(--sp-3);flex-wrap:wrap}.catalog-filter select,.catalog-filter input{border-radius:var(--rad-m);padding:var(--sp-2) var(--sp-3);background:var(--bg-1);min-width:200px}.catalog-filter-chips{display:flex;gap:var(--sp-2);flex-wrap:wrap;align-items:center}.catalog-filter-chip{padding:var(--sp-1) var(--sp-3);border-radius:var(--rad-pill);border:1px solid var(--b-1);background:var(--bg-2);color:var(--t-2);font-size:11.5px;cursor:pointer;transition:all var(--dur-fast) var(--ease-out)}.catalog-filter-chip:hover{color:var(--t-0);border-color:var(--b-2)}.catalog-filter-chip.active{background:var(--g-0-dim);color:var(--g-0);border-color:var(--g-0-glow)}.catalog-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-4)}.catalog-card{background:linear-gradient(180deg,var(--bg-2) 0%,var(--bg-1) 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var(--ease-out)}.catalog-card:hover{border-color:var(--g-0-glow);transform:translateY(-3px);box-shadow:var(--shadow-2)}.catalog-card:hover:after{opacity:1}.catalog-card-header{flex-direction:column;align-items:flex-start;gap:var(--sp-2)}.catalog-card-title{font-size:18px;letter-spacing:-.005em;color:var(--t-0);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.catalog-card-language{background:var(--g-0-dim);color:var(--g-0);border-color:var(--g-0-glow);border-radius:var(--rad-pill);padding:2px var(--sp-2);font-size:10px;font-weight:700;letter-spacing:.12em}.catalog-card-description{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-size:13px;color:var(--t-2);line-height:1.5}.catalog-card-footer{margin-top:auto}.catalog-card-link{display:inline-flex;align-items:center;gap:var(--sp-1);padding:var(--sp-2) var(--sp-4);border:1px solid 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th{position:sticky;top:0;background:var(--bg-3);color:var(--g-0);font-size:10.5px;letter-spacing:.16em;font-weight:700;border-bottom:1px solid var(--b-2);padding:var(--sp-3) var(--sp-4)}.admin-table tbody tr:nth-child(odd),.skills-table tbody tr:nth-child(odd){background:#ffffff04}.admin-table tbody tr:hover,.skills-table tbody tr:hover{background:var(--g-0-dim)}.admin-table th,.admin-table td,.skills-table th,.skills-table td{padding:var(--sp-3) var(--sp-4)}.admin-pagination{gap:var(--sp-3);padding-top:var(--sp-3)}.admin-pagination button{border-radius:var(--rad-m);background:var(--bg-3)}.admin-form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--sp-4)}.admin-form-grid label,.admin-form-grid .admin-filter-label{font-family:var(--mono)}.admin-modal-backdrop{background:#070809a6;backdrop-filter:blur(8px) saturate(140%);-webkit-backdrop-filter:blur(8px) saturate(140%);animation:polishFadeIn var(--dur-base) var(--ease-out) both;z-index:var(--z-modal)}.admin-modal{background:var(--bg-1);color:var(--t-0);border:1px solid var(--b-2);border-radius:var(--rad-xl);padding:var(--sp-6);box-shadow:var(--shadow-3);animation:polishFadeIn var(--dur-slow) var(--ease-out) both}.admin-modal h2{color:var(--t-0);font-size:18px}.admin-modal p{color:var(--t-1)}.admin-modal .admin-button--danger{background:var(--r-0);color:#fff;border-color:var(--r-0);border-radius:var(--rad-m);padding:var(--sp-2) var(--sp-4)}.admin-modal .admin-button--danger:hover:not(:disabled){box-shadow:0 0 0 1px var(--r-0-glow),0 8px 24px #ff5f5747}.admin-drawer{background:var(--bg-1);color:var(--t-0);border-left:1px solid var(--b-2);box-shadow:var(--shadow-3);z-index:var(--z-drawer);animation:tutorDrawerSlideIn var(--dur-slow) var(--ease-out)}.admin-drawer-header{border-bottom:1px solid var(--b-1);padding:var(--sp-4) var(--sp-5)}.admin-drawer-body{padding:var(--sp-4) var(--sp-5)}.admin-drawer h3{color:var(--t-0);font-size:15px}.admin-drawer pre{background:var(--bg-3);border-radius:var(--rad-m);color:var(--t-1);border:1px solid var(--b-1)}.admin-audit-changes li[data-kind=added]{color:var(--g-0)}.admin-audit-changes li[data-kind=removed]{color:var(--r-0)}.admin-audit-changes li[data-kind=changed]{color:var(--y-0)}.admin-impersonation-banner{background:linear-gradient(90deg,var(--y-0),#fde68a);color:#4a2c00;font-weight:700;font-family:var(--mono);padding:var(--sp-2) var(--sp-5);z-index:var(--z-impersonation);border-bottom:1px solid #b45309;box-shadow:0 4px 12px #facc1552;letter-spacing:.01em;animation:polishFadeIn var(--dur-base) var(--ease-out) both}.admin-impersonation-banner:before{content:"⚠";margin-right:var(--sp-2);font-size:14px}.admin-impersonation-exit{background:#4a2c00;color:#fde68a;border-radius:var(--rad-m);padding:var(--sp-1) var(--sp-3);font-weight:700;border:1px solid #4a2c00}.tutor-drawer{z-index:var(--z-drawer);box-shadow:var(--shadow-3)}.tutor-drawer-header{padding:var(--sp-3) var(--sp-4);background:#0f1215d9;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}.tutor-drawer-title{font-size:11px;letter-spacing:.16em;color:var(--g-0);font-weight:700}.tutor-drawer-header-titles{display:flex;flex-direction:column;gap:2px;min-width:0}.tutor-drawer-task-title{font-size:12.5px;color:var(--t-1);font-weight:500;letter-spacing:0;text-transform:none;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:240px;display:inline-block}.tutor-drawer-end-button{border-radius:var(--rad-m);padding:var(--sp-1) var(--sp-3);font-size:10.5px;letter-spacing:.04em;font-weight:600;text-transform:uppercase}.tutor-drawer-end-button:hover{background:var(--r-0-dim);color:var(--r-0);border-color:var(--r-0)}.tutor-drawer-close-button{border-radius:var(--rad-m)}.tutor-message{border-radius:var(--rad-l);padding:var(--sp-3) var(--sp-4);animation:polishFadeIn var(--dur-base) var(--ease-out) both;box-shadow:var(--shadow-1)}.tutor-message-user{background:var(--g-1-dim);border-color:var(--g-1-glow)}.tutor-message-assistant{background:var(--bg-2)}.tutor-input-form{padding:var(--sp-3) var(--sp-4) var(--sp-4);border-top:1px solid var(--b-1);background:#0b0d10d9;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);position:sticky;bottom:0}.tutor-drawer-input{border-radius:var(--rad-m);padding:var(--sp-3)}.tutor-drawer-send-button{border-radius:var(--rad-m);padding:var(--sp-2) var(--sp-5);font-weight:700}.tutor-typing-indicator{display:inline-flex;align-items:center;gap:var(--sp-1);margin-left:var(--sp-1)}.tutor-typing-indicator span{display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--g-1);animation:typingDots 1.2s infinite var(--ease-out)}.tutor-typing-indicator span:nth-child(2){animation-delay:.18s}.tutor-typing-indicator span:nth-child(3){animation-delay:.36s}.chip{display:inline-flex;align-items:center;gap:var(--sp-1);padding:var(--sp-1) var(--sp-3);border:1px solid var(--b-1);border-radius:var(--rad-pill);background:var(--bg-2);color:var(--t-2);font-size:11px;letter-spacing:.04em}.card{border-radius:var(--rad-l);padding:var(--sp-5);border:1px solid var(--b-1);background:var(--bg-1);box-shadow:var(--shadow-1)}.btn-primary,.btn-secondary,.btn-danger{border-radius:var(--rad-m);padding:var(--sp-3) var(--sp-5);font-weight:700;letter-spacing:.02em;transition:background var(--dur-fast) var(--ease-out),color var(--dur-fast) var(--ease-out),border-color var(--dur-fast) var(--ease-out),box-shadow var(--dur-fast) var(--ease-out),transform var(--dur-fast) var(--ease-out)}.btn-primary:hover:not(:disabled){box-shadow:var(--shadow-glow-lime);transform:translateY(-1px)}.btn-secondary:hover:not(:disabled){background:var(--bg-3);border-color:var(--b-3)}.btn-danger:hover:not(:disabled){background:var(--r-0-dim);border-color:var(--r-0)}.mastery-bar{border-radius:var(--rad-pill);height:6px}.mastery-bar-fill{background:linear-gradient(90deg,var(--g-2),var(--g-0));box-shadow:0 0 8px var(--g-0-dim)}@media(max-width:720px){.app-shell{padding:var(--sp-4) var(--sp-3) var(--sp-7);gap:var(--sp-4)}.topnav,.public-nav{padding:var(--sp-3);border-radius:var(--rad-l);gap:var(--sp-2)}.topnav-mobile-toggle{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:var(--rad-m);border:1px solid var(--b-1);background:var(--bg-2);color:var(--t-0);padding:0}.topnav-mobile-toggle:hover{background:var(--bg-3);border-color:var(--g-0-glow)}.topnav-tabs button{font-size:11.5px;padding:var(--sp-2) var(--sp-2)}.landing-hero{padding:var(--sp-7) var(--sp-5)}.landing-hero h1{font-size:36px}.landing-hero .hero-sub{font-size:13.5px}.landing-hero .hero-ctas{flex-direction:column;align-items:stretch}.auth-card{padding:var(--sp-6) var(--sp-5);margin:var(--sp-3) auto 0}.generator-dual{grid-template-columns:1fr}.stats-metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.catalog-grid{grid-template-columns:1fr;gap:var(--sp-3)}.catalog-section{padding:var(--sp-5)}.lesson-player{grid-template-columns:1fr}.lesson-player-nav,.lesson-player-progress{position:static;max-height:none}.lesson-player-main{padding:var(--sp-5)}.landing-howitworks-steps{grid-template-columns:1fr}.landing-howitworks{padding:var(--sp-5)}.text-block-examples-grid{grid-template-columns:1fr}.tutor-drawer{width:100vw;max-width:100vw;border-left:0}.tutor-drawer-task-title{max-width:140px}.admin-main{padding:var(--sp-4)}.admin-form-grid{grid-template-columns:1fr}}