:root{--bg:#f5f7fb;--paper:#fff;--ink:#182438;--muted:#68768b;--line:#e0e6ef;--blue:#4169e1;--blue-dark:#294ab5;--cyan:#13a7a0;--green:#138a66;--soft-blue:#edf2ff;--shadow:0 18px 50px rgba(27,44,75,.08);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);line-height:1.55}.topbar{height:76px;background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(5vw,24px);gap:24px;position:sticky;top:0;z-index:10;backdrop-filter:blur(12px)}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:18px;white-space:nowrap}.brand-mark{width:34px;height:34px;display:grid;place-items:center;border-radius:10px;background:var(--blue);color:white;font-weight:900;font-size:19px;box-shadow:0 5px 14px #4169e144}.brand-mark span{color:#83f0d8}.topnav{display:flex;gap:4px;align-items:center}.nav-link{border:0;background:transparent;color:var(--muted);padding:10px 12px;border-radius:9px;font-weight:650;cursor:pointer;font-size:13px}.nav-link:hover,.nav-link.active{background:var(--soft-blue);color:var(--blue-dark)}.top-link{font-size:13px;font-weight:700;text-decoration:none;color:var(--blue);white-space:nowrap}.hero{padding:78px max(7vw,24px) 58px;display:grid;grid-template-columns:1.04fr .96fr;align-items:center;gap:7vw;background:linear-gradient(130deg,#fff 0%,#f7f9ff 70%,#eff6ff 100%);border-bottom:1px solid var(--line)}.eyebrow{font-size:10px;letter-spacing:1.7px;font-weight:850;color:var(--blue);margin-bottom:13px}.pulse{display:inline-block;width:7px;height:7px;border-radius:50%;background:#19b98e;margin-right:7px;box-shadow:0 0 0 4px #19b98e20}h1{font-size:clamp(36px,4.3vw,58px);line-height:1.07;letter-spacing:-2.6px;margin:0 0 20px;font-weight:850}h1 span,.bottom-cta h2 span{color:var(--blue)}.hero-copy>p{max-width:580px;color:var(--muted);font-size:16px}.hero-actions{display:flex;gap:12px;margin-top:28px}.btn{border:0;border-radius:10px;padding:13px 18px;font-weight:750;font-size:13px;cursor:pointer;display:inline-flex;align-items:center;gap:17px;justify-content:center;transition:transform .15s,box-shadow .15s}.btn:hover{transform:translateY(-1px)}.btn.primary{background:var(--blue);color:white;box-shadow:0 8px 18px #4169e12c}.btn.primary:hover{background:var(--blue-dark)}.btn.secondary{background:white;border:1px solid var(--line);color:var(--ink)}.microcopy{font-size:11px!important;margin-top:24px}.hero-visual{background:#111b2e;border-radius:16px;box-shadow:var(--shadow);overflow:hidden;color:#dbe5f5;transform:rotate(.4deg)}.window-bar{height:42px;background:#1a2740;border-bottom:1px solid #30405a;display:flex;align-items:center;gap:6px;padding:0 15px}.window-bar i{width:7px;height:7px;border-radius:50%;background:#64738a}.window-bar span{font-size:10px;color:#a6b5ce;margin-left:9px}.code-preview{padding:24px 18px 27px;font:12px/2.05 ui-monospace,SFMono-Regular,Menlo,monospace;white-space:nowrap;overflow:hidden}.ln{color:#61728d;display:inline-block;width:29px;user-select:none}.kw{color:#7bc7ff}.fn{color:#e3b9ff}.asm-op{color:#7ce0c2}.comment{color:#7889a5}.preview-divider{height:1px;background:#344158;margin:15px 0}.visual-footer{background:#18253b;padding:12px 17px;color:#9cacc4;font-size:10px}.status-dot{display:inline-block;width:7px;height:7px;background:#22bb8b;border-radius:50%;margin-right:7px}.status-dot.muted{background:#9aa7b9}.feature-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;padding:23px max(7vw,24px);background:#fff;border-bottom:1px solid var(--line)}.feature-strip>div{display:flex;gap:12px;align-items:center;padding:5px 10px}.feature-icon{width:38px;height:38px;border-radius:11px;background:var(--soft-blue);color:var(--blue);display:grid;place-items:center;font-size:21px;font-weight:800}.feature-strip strong,.feature-strip small{display:block}.feature-strip strong{font-size:12px}.feature-strip small{font-size:11px;color:var(--muted);margin-top:3px}main{max-width:1440px;margin:auto}.view{display:none;padding:54px max(5vw,24px) 70px}.view.active{display:block}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:25px;margin-bottom:26px}.section-heading h2{font-size:clamp(25px,3vw,34px);letter-spacing:-1.2px;line-height:1.2;margin:0 0 8px}.section-heading p{margin:0;color:var(--muted);font-size:13px;max-width:720px}.api-status{font-size:11px;color:var(--muted);white-space:nowrap;margin-bottom:6px}.toolbar{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:14px}.toolbar label{font-size:10px;letter-spacing:.3px;font-weight:800;color:var(--muted);display:flex;flex-direction:column;gap:6px}.toolbar select,.pattern-toolbar select,.pattern-toolbar input{background:#fff;border:1px solid var(--line);border-radius:8px;padding:10px 12px;color:var(--ink);font:inherit;font-size:12px;min-width:130px;outline-color:var(--blue)}.toolbar .compiler-field{flex:1;min-width:210px}.toolbar .compiler-field select{width:100%}.workspace{display:grid;grid-template-columns:1fr 1fr;gap:14px}.editor-panel,.analysis-results,.lesson-detail{background:var(--paper);border:1px solid var(--line);border-radius:12px;overflow:hidden;min-width:0}.panel-head{height:47px;display:flex;align-items:center;justify-content:space-between;padding:0 15px;border-bottom:1px solid var(--line);font-size:10px;letter-spacing:.9px;font-weight:850;color:#526178;gap:8px}.panel-dot{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:7px}.panel-dot.blue{background:var(--blue)}.panel-dot.green{background:#19a879}.text-button{border:0;background:transparent;color:var(--blue);font-weight:750;font-size:11px;cursor:pointer;padding:5px}.text-button:hover{text-decoration:underline}textarea{resize:vertical;border:0;outline:0;width:100%;display:block;background:#fbfcff;color:#26354d;font:12px/1.8 ui-monospace,SFMono-Regular,Menlo,monospace;padding:18px;min-height:340px;tab-size:4}.editor-footer{display:flex;justify-content:space-between;gap:12px;padding:9px 14px;background:#fff;border-top:1px solid var(--line);color:#8793a5;font-size:10px}.assembly-output{margin:0;padding:18px;min-height:340px;max-height:510px;overflow:auto;white-space:pre-wrap;overflow-wrap:anywhere;background:#101a2b;color:#c9d8ef;font:12px/1.85 ui-monospace,SFMono-Regular,Menlo,monospace}.placeholder{color:#7889a5}.compile-message{padding:10px 14px;font-size:11px;color:var(--muted);border-top:1px solid #28344a;background:#152136;min-height:36px}.panel-actions{display:flex;gap:5px}.compile-row{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:14px}.privacy-note{font-size:11px;color:var(--muted)}.callout{margin-top:18px;border:1px solid #d9e4ff;background:#f0f4ff;padding:14px 16px;border-radius:10px;color:#536582;font-size:12px}.callout strong{color:#263f83}.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:18px}.lesson-card,.pattern-card{border:1px solid var(--line);background:white;border-radius:12px;padding:18px;text-align:left;cursor:pointer;transition:.15s;display:flex;flex-direction:column;gap:8px}.lesson-card:hover,.lesson-card.selected,.pattern-card:hover{border-color:#a8baff;box-shadow:0 8px 25px #243f8010;transform:translateY(-1px)}.lesson-number{font-size:10px;color:var(--blue);font-weight:850;letter-spacing:1px}.lesson-card strong,.pattern-card strong{font-size:14px}.lesson-card p,.pattern-card p{font-size:12px;color:var(--muted);margin:0}.lesson-card .level{font-size:10px;color:#68768b;background:#f0f3f8;padding:4px 7px;border-radius:5px;align-self:flex-start;margin-top:4px}.lesson-detail{padding:25px;min-height:200px}.lesson-detail h3{margin:0 0 8px;font-size:22px}.lesson-detail p,.lesson-detail li{font-size:13px;color:#58677d}.lesson-detail pre{background:#101a2b;color:#c9d8ef;border-radius:8px;padding:15px;overflow:auto;font:12px/1.8 ui-monospace,monospace}.lesson-empty{padding:28px;color:var(--muted);font-size:13px;text-align:center}.quiz{border-top:1px solid var(--line);padding-top:17px;margin-top:18px}.quiz button{border:1px solid var(--line);background:white;padding:8px 12px;border-radius:7px;margin:5px 6px 0 0;cursor:pointer;font-size:12px}.quiz button.correct{border-color:#8bd5b7;background:#e8faf1}.quiz button.incorrect{border-color:#f0b3b3;background:#fff0f0}.quiz-feedback{font-size:12px;font-weight:700;margin-top:8px}.pattern-toolbar{display:flex;gap:10px;margin-bottom:16px}.pattern-toolbar input{flex:1;min-width:160px}.pattern-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.pattern-card{cursor:pointer;min-height:172px}.pattern-card .tag{align-self:flex-start;border-radius:5px;background:#eef2ff;color:#445ac0;font-size:10px;font-weight:800;padding:4px 7px}.pattern-card .pattern-arrow{margin-top:auto;font-size:11px;color:var(--blue);font-weight:800}.pattern-detail{margin-top:16px;padding:22px;background:white;border:1px solid var(--line);border-radius:12px}.pattern-detail h3{margin:0 0 8px}.pattern-detail pre{background:#101a2b;color:#c9d8ef;padding:15px;border-radius:8px;overflow:auto;font:12px/1.8 ui-monospace,monospace}.pattern-detail p,.pattern-detail li{font-size:13px;color:#5a687c}.safety-note{margin-top:20px;background:#fff8e9;border:1px solid #f3dfb4;color:#776039;border-radius:10px;padding:15px;font-size:12px}.analyzer-layout{display:grid;grid-template-columns:1fr 1fr;gap:14px}.analyzer-actions{padding:12px;display:flex;gap:8px;border-top:1px solid var(--line)}.analysis-results{padding:0;min-height:280px}.instruction-row{padding:14px 16px;border-bottom:1px solid var(--line)}.instruction-row:last-child{border-bottom:0}.instruction-row code{font:12px ui-monospace,monospace;background:#101a2b;color:#8de2c6;padding:5px 8px;border-radius:5px;display:inline-block;margin-bottom:8px}.instruction-row strong{display:block;font-size:12px;margin-bottom:4px}.instruction-row p{margin:0;color:var(--muted);font-size:12px}.risk-chip{display:inline-block;background:#fff3dc;color:#94611b;border-radius:5px;padding:3px 6px;font-size:9px;font-weight:850;margin-left:7px}.bottom-cta{margin:0 max(5vw,24px) 48px;background:#eaf0ff;border:1px solid #dbe5ff;border-radius:16px;padding:35px 38px;display:flex;justify-content:space-between;align-items:center;gap:25px}.bottom-cta h2{font-size:clamp(25px,3vw,35px);line-height:1.15;letter-spacing:-1px;margin:0 0 10px}.bottom-cta p{margin:0;color:var(--muted);font-size:13px}.btn.light{background:white;color:var(--blue);border:1px solid #d4dfff;white-space:nowrap}footer{border-top:1px solid var(--line);background:white;padding:25px max(5vw,24px);display:flex;align-items:center;justify-content:space-between;gap:20px;color:var(--muted);font-size:11px}footer a{color:var(--blue);text-decoration:none}.brand.small{font-size:13px}.brand.small .brand-mark{width:26px;height:26px;font-size:15px}@media(max-width:1000px){.topbar{padding:0 22px}.topnav{overflow:auto}.top-link{display:none}.hero{padding:55px 28px;gap:30px}.feature-strip{padding:20px 24px}.view{padding:42px 24px 55px}.pattern-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:740px){.topbar{height:auto;min-height:68px;align-items:flex-start;flex-wrap:wrap;padding:14px 18px;gap:10px}.topnav{order:3;width:100%;overflow:auto}.nav-link{white-space:nowrap;padding:8px 10px}.hero{grid-template-columns:1fr;padding:45px 22px 35px}.hero-visual{transform:none}.feature-strip{grid-template-columns:1fr;padding:12px 18px}.feature-strip>div{padding:6px}.workspace,.analyzer-layout{grid-template-columns:1fr}.section-heading{align-items:flex-start;flex-direction:column}.toolbar{display:grid;grid-template-columns:1fr 1fr}.toolbar .compiler-field{min-width:0}.toolbar select{min-width:0;width:100%}.lesson-grid,.pattern-grid{grid-template-columns:1fr 1fr}.compile-row{align-items:flex-start;flex-direction:column}.compile-row .btn{width:100%}.bottom-cta{margin:0 18px 30px;padding:26px;align-items:flex-start;flex-direction:column}footer{flex-wrap:wrap;padding:22px 18px}textarea,.assembly-output{min-height:270px}.pattern-toolbar{flex-direction:column}}@media(max-width:450px){.lesson-grid,.pattern-grid{grid-template-columns:1fr}.hero-actions{flex-wrap:wrap}h1{letter-spacing:-1.5px}.toolbar{grid-template-columns:1fr}.editor-footer{font-size:9px}}

.instruction-ref{display:inline-block;margin:3px 4px 3px 0;padding:4px 7px;border:1px solid #dbe4f4;border-radius:6px;background:#f7f9fd;color:#3453a4;font:11px ui-monospace,monospace}
.annotated-code{display:grid;gap:0;background:#101a2b;border-radius:9px;overflow:auto;margin:12px 0}
.annotated-line{display:grid;grid-template-columns:minmax(210px,.8fr) 1.2fr;gap:14px;padding:10px 13px;border-bottom:1px solid #26344b;align-items:start}
.annotated-line:last-child{border-bottom:0}.annotated-line code{color:#8de2c6;font:12px/1.7 ui-monospace,monospace;white-space:pre-wrap;overflow-wrap:anywhere}.annotated-line span{color:#b9c8df;font-size:11px;line-height:1.6}
.lesson-progress{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:11px;margin-bottom:18px}.progress-track{height:6px;background:#e4eaf5;border-radius:99px;flex:1;overflow:hidden}.progress-fill{height:100%;width:0;background:var(--blue);border-radius:99px}
.module-banner{background:#fff;border:1px solid var(--line);border-radius:12px;padding:17px 20px;margin-bottom:20px;display:flex;align-items:center;justify-content:space-between;gap:18px}.module-banner strong{font-size:13px}.module-banner p{font-size:11px;color:var(--muted);margin:4px 0 0}
.pattern-detail .section-label{font-size:10px;letter-spacing:1px;font-weight:850;color:var(--blue);margin-top:20px}.pattern-detail .ref-list{display:flex;flex-wrap:wrap;gap:5px}
@media(max-width:740px){.annotated-line{grid-template-columns:1fr;gap:4px}.module-banner{align-items:flex-start;flex-direction:column}}

/* AssemblyLab Game Hub */
.game-status-pill{display:inline-flex;align-items:center;gap:7px;background:#eaf9f2;border:1px solid #ccefe0;color:#237858;border-radius:999px;padding:8px 12px;font-size:11px;font-weight:750;white-space:nowrap}.player-card{display:grid;grid-template-columns:1fr minmax(240px,.8fr);gap:28px;align-items:center;padding:24px;background:linear-gradient(120deg,#fff 0%,#f0f4ff 100%);border:1px solid #dce5fb;border-radius:16px;box-shadow:var(--shadow);margin-bottom:15px}.player-identity{display:flex;align-items:center;gap:15px}.player-avatar{width:58px;height:58px;display:grid;place-items:center;border-radius:17px;background:var(--blue);color:#fff;font-size:27px;font-weight:900;box-shadow:0 8px 20px #4169e133}.player-avatar span{color:#83f0d8}.player-identity .eyebrow{margin:0 0 3px}.player-identity h3{font-size:21px;margin:0;letter-spacing:-.5px}.player-identity p{font-size:12px;color:var(--muted);margin:4px 0 0}.xp-line{display:flex;justify-content:space-between;align-items:baseline;gap:10px;margin-bottom:9px}.xp-line strong{font-size:21px}.xp-line span{font-size:10px;color:var(--muted)}.xp-track{height:9px;background:#dfe7fa;border-radius:999px;overflow:hidden}.xp-fill{height:100%;width:0;background:linear-gradient(90deg,var(--blue),#13a7a0);border-radius:999px;transition:width .25s}.game-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:22px}.game-stat{display:flex;flex-direction:column;gap:4px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:17px}.game-stat span{font-size:11px;color:var(--muted)}.game-stat strong{font-size:26px;letter-spacing:-.8px}.game-stat small{font-size:10px;color:#8995a7}.game-layout{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(250px,.8fr);gap:14px;align-items:start}.challenge-panel,.daily-panel{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;min-width:0}.challenge-topline{display:flex;align-items:flex-start;justify-content:space-between;gap:15px}.challenge-topline .eyebrow{margin-bottom:5px}.challenge-topline h3,.daily-panel h3{font-size:21px;letter-spacing:-.6px;margin:0}.difficulty-pill{display:inline-block;background:#edf2ff;color:#3c57b8;border-radius:6px;padding:5px 8px;font-size:9px;letter-spacing:.6px;font-weight:900;white-space:nowrap}.challenge-prompt{font-size:14px;font-weight:700;margin:20px 0 12px}.challenge-code{white-space:pre-wrap;overflow:auto;background:#111b2e;color:#bfe8da;border:1px solid #263650;border-radius:10px;padding:17px;font:13px/1.9 ui-monospace,SFMono-Regular,Menlo,monospace;min-height:82px}.challenge-options{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:15px}.challenge-option{padding:12px;text-align:left;border:1px solid var(--line);background:#fff;border-radius:9px;color:var(--ink);font:600 12px/1.5 ui-monospace,SFMono-Regular,Menlo,monospace;cursor:pointer;overflow-wrap:anywhere;transition:border-color .15s,background .15s}.challenge-option:hover:not(:disabled){border-color:#a9baff;background:#f6f8ff}.challenge-option:disabled{cursor:default}.challenge-option.correct{background:#e9f9f1;border-color:#8bd5b7;color:#176e4f}.challenge-option.incorrect{background:#fff0f0;border-color:#efb0b0;color:#9a3b3b}.challenge-feedback{min-height:58px;padding:13px 14px;background:#f7f9fd;border:1px solid #e9eef7;border-radius:9px;margin-top:13px;color:#5b6980;font-size:12px;line-height:1.7}.feedback-good{color:#147a55}.feedback-warn{color:#a24b4b}.hint-note{display:inline-block;color:#71809a;font-size:10px;margin-top:3px}.challenge-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:13px}.challenge-actions .btn{padding:10px 12px;font-size:11px;text-decoration:none}.btn:disabled{opacity:.48;cursor:not-allowed;transform:none}.game-disclaimer{font-size:10px;color:#8a96a8;line-height:1.6;margin:14px 0 0}.daily-panel{background:linear-gradient(160deg,#fff 0%,#f8faff 100%)}.daily-panel>.eyebrow{margin-bottom:8px}.daily-panel>p{font-size:12px;color:var(--muted);margin:8px 0 15px}.daily-reward{display:flex;justify-content:space-between;align-items:center;padding:13px;background:#fff7e6;border:1px solid #f2e1b9;border-radius:9px;margin:14px 0 10px}.daily-reward span{font-size:9px;font-weight:900;letter-spacing:.8px;color:#8c6a23}.daily-reward strong{font-size:18px;color:#966d13}.daily-status{font-size:11px;color:var(--muted);margin-bottom:10px}.daily-panel .btn{width:100%;font-size:11px;padding:11px}.daily-separator{height:1px;background:var(--line);margin:22px 0}.badge-list{display:grid;gap:9px}.badge-empty{font-size:11px;color:var(--muted);padding:12px;background:#fff;border:1px dashed var(--line);border-radius:8px}.earned-badge{display:flex;gap:10px;align-items:center}.badge-medal{display:grid;place-items:center;flex:0 0 31px;height:31px;border-radius:10px;background:#fff3d6;color:#b47d12;font-size:17px}.earned-badge strong,.earned-badge small{display:block}.earned-badge strong{font-size:11px}.earned-badge small{font-size:10px;color:var(--muted);margin-top:2px}.worlds-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin:42px 0 18px}.worlds-heading h2{font-size:clamp(24px,2.8vw,31px);margin:0 0 5px;letter-spacing:-.8px}.worlds-heading p{margin:0;color:var(--muted);font-size:12px}.worlds-heading .btn{font-size:11px;white-space:nowrap}.world-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:11px}.world-card{display:flex;flex-direction:column;align-items:flex-start;min-height:155px;text-align:left;padding:16px;border:1px solid var(--line);background:#fff;border-radius:12px;cursor:pointer;transition:transform .15s,border-color .15s,box-shadow .15s}.world-card:hover{transform:translateY(-2px);border-color:#a9baff;box-shadow:0 9px 24px #243f8010}.world-card.world-discovery{background:#fafbfd}.world-number{font-size:9px;letter-spacing:1px;font-weight:900;color:var(--blue);margin-bottom:10px}.world-card strong{font-size:13px}.world-card p{font-size:11px;color:var(--muted);line-height:1.5;margin:6px 0 13px}.world-footer{display:flex;justify-content:space-between;align-items:center;gap:8px;width:100%;margin-top:auto;font-size:9px;color:#728098}.world-footer span:last-child{color:var(--blue);font-weight:800}.game-callout{margin-top:18px;background:#eef8f6;border:1px solid #d1ebe5;border-radius:10px;padding:15px 17px;color:#4c6f6a;font-size:12px}.game-callout strong{color:#225e55}
@media(max-width:1000px){.world-grid{grid-template-columns:repeat(3,1fr)}.game-stats{grid-template-columns:repeat(2,1fr)}}
@media(max-width:740px){.player-card,.game-layout{grid-template-columns:1fr}.player-card{gap:18px;padding:19px}.worlds-heading{align-items:flex-start;flex-direction:column}.world-grid{grid-template-columns:repeat(2,1fr)}.game-status-pill{white-space:normal}.challenge-panel,.daily-panel{padding:17px}}
@media(max-width:450px){.game-stats{gap:8px}.game-stat{padding:12px}.game-stat strong{font-size:22px}.world-grid,.challenge-options{grid-template-columns:1fr}.challenge-topline{flex-direction:column}.challenge-actions .btn{flex:1}.xp-line{align-items:flex-start;flex-direction:column;gap:2px}}
.world-card.world-locked{background:#f5f6f9;border-style:dashed;color:#778398}.world-card.world-locked .world-number{color:#8994a5}.world-card.world-locked .world-footer span:last-child{color:#8994a5}.world-card.world-locked:hover{transform:none;box-shadow:none;border-color:#cbd3e0}

/* Decimal/hex teaching aid */
.number-system-tip{margin-top:12px;padding:13px 14px;background:#fffaf0;border:1px solid #f0dfb8;border-radius:10px;color:#67552d;font-size:11px;line-height:1.6}
.number-system-tip>strong{display:block;color:#755514;font-size:12px;margin-bottom:8px}
.number-system-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px 12px}
.number-system-grid span{display:flex;justify-content:space-between;gap:8px;padding:4px 7px;background:#fff;border-radius:5px}
.number-system-grid b{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:#253b70}
.number-system-tip p{margin:9px 0 0}
.challenge-feedback{white-space:pre-line}

/* Malware pattern detail panel: revealed after selecting a pattern card */
.pattern-detail[hidden]{display:none!important}
.pattern-detail:not([hidden]){display:block;scroll-margin-top:96px}
.pattern-detail .annotated-code{display:grid;gap:8px;margin:12px 0}
.pattern-detail .annotated-line{display:grid;grid-template-columns:minmax(220px,.8fr) minmax(0,1.2fr);gap:12px;align-items:start;padding:10px;background:#f7f9fd;border:1px solid var(--line);border-radius:8px}
.pattern-detail .annotated-line code{display:block;white-space:pre-wrap;overflow-wrap:anywhere;background:#101a2b;color:#8de2c6;padding:10px;border-radius:6px;font:12px/1.7 ui-monospace,SFMono-Regular,Menlo,monospace}
.pattern-detail .annotated-line span{font-size:12px;color:#58677d}
@media(max-width:700px){.pattern-detail .annotated-line{grid-template-columns:1fr}}

/* Lesson cards should take learners directly to the lesson content */
#lesson-detail{scroll-margin-top:24px}
.lesson-card.selected{outline:2px solid var(--accent,#3867d6);outline-offset:2px}

/* Player identity and local completion certificate */
.player-tools{display:flex;align-items:end;justify-content:space-between;gap:16px;margin:0 0 18px;padding:16px}
.player-name-field{display:grid;gap:6px;flex:1;max-width:480px}
.player-name-field label{font-weight:700;font-size:13px}
.player-name-field input{width:100%;border:1px solid var(--line,#dce3ed);border-radius:10px;padding:11px 12px;background:#fff;color:#17233b;font:inherit}
.player-name-field small,.certificate-note{font-size:11px;color:var(--muted,#6b778c)}
.certificate-panel{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:14px;margin:0 0 20px;padding:18px}
.certificate-panel h3{margin:4px 0 6px}
.certificate-panel p{margin:0;color:var(--muted,#6b778c);font-size:13px}
.certificate-progress{display:grid;gap:6px;font-size:12px;font-weight:700;color:var(--muted,#6b778c)}
.certificate-note{grid-column:1/-1}
#download-certificate:disabled{opacity:.55;cursor:not-allowed}
#lesson-detail{scroll-margin-top:24px}
.lesson-card.selected{outline:2px solid var(--accent,#3867d6);outline-offset:2px}
@media(max-width:700px){.player-tools{align-items:stretch;flex-direction:column}.player-name-field{max-width:none}.certificate-panel{grid-template-columns:1fr}.certificate-note{grid-column:auto}}