:root{--bg:#10141d;--bg-alt:#161c28;--panel:#1b2130;--panel-alt:#232b3d;--line:#2c3446;--text:#e8ecf4;--dim:#8b95a8;--gold:#f2c94c;--blue:#5b9dff;--green:#4ec9a0;--red:#ff6b6b;--purple:#b48cff;--mono:ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Inter,system-ui,sans-serif;font-size:15px;line-height:1.6}.app{grid-template-columns:300px 1fr;height:100%;display:grid}.topbar,.scrim{display:none}.sidebar{background:var(--bg-alt);border-right:1px solid var(--line);flex-direction:column;gap:18px;padding:20px 16px;display:flex;overflow-y:auto}.brand{color:inherit;align-items:center;gap:11px;text-decoration:none;display:flex}.brand-mark{background:linear-gradient(140deg, var(--gold), #e0a020);color:#201a05;border-radius:9px;flex:0 0 36px;place-items:center;width:36px;height:36px;font-size:14px;font-weight:800;display:grid}.brand-text{flex-direction:column;line-height:1.3;display:flex}.brand-text strong{font-size:14px}.brand-text em{color:var(--dim);font-size:11px;font-style:normal}.progress-card{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:11px 12px}.progress-top{color:var(--dim);justify-content:space-between;margin-bottom:8px;font-size:11.5px;display:flex}.progress-track{background:var(--line);border-radius:3px;height:6px;overflow:hidden}.progress-fill{background:linear-gradient(90deg, var(--gold), var(--green));height:100%}.nav{flex-direction:column;flex:1;gap:16px;display:flex}.nav-group h3{text-transform:uppercase;letter-spacing:.07em;color:var(--dim);margin:0 0 6px 8px;font-size:10.5px;font-weight:700}.nav-item{color:var(--text);border-radius:7px;align-items:center;gap:9px;padding:7px 9px;font-size:13px;text-decoration:none;transition:background .15s;display:flex}.nav-item:hover{background:var(--panel)}.nav-item.active{background:var(--panel-alt);color:var(--gold)}.dot{border:1.5px solid var(--line);border-radius:50%;flex:0 0 7px;width:7px;height:7px}.dot.done{background:var(--green);border-color:var(--green)}.reset{padding:6px;font-size:11.5px}.main{padding:44px 52px 96px;overflow-y:auto}.home,.module{max-width:780px;margin:0 auto}.eyebrow{letter-spacing:.1em;text-transform:uppercase;color:var(--gold);font-size:11.5px;font-weight:700}.home h1{letter-spacing:-.02em;margin:12px 0 14px;font-size:40px;line-height:1.14}.home-lead{color:var(--dim);margin:0 0 26px;font-size:17px}.stats{grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:26px;display:grid}.stats>div{background:var(--panel);border:1px solid var(--line);text-align:center;border-radius:10px;padding:14px}.stats strong{color:var(--gold);font-size:24px;display:block}.stats span{color:var(--dim);font-size:11.5px}.home-parts{gap:24px;margin-top:44px;display:grid}.home-part h3{text-transform:uppercase;letter-spacing:.07em;color:var(--gold);margin:0 0 10px;font-size:12px}.home-part ul{gap:7px;margin:0;padding:0;list-style:none;display:grid}.home-part li{background:var(--panel);border:1px solid var(--line);border-radius:8px;grid-template-columns:260px 1fr;gap:14px;padding:8px 12px;font-size:13px;display:grid}.home-part li a{color:var(--text);font-weight:600;text-decoration:none}.home-part li a:hover{color:var(--gold)}.home-part li span{color:var(--dim)}.home-foot{border-top:1px solid var(--line);color:var(--dim);margin-top:40px;padding-top:20px;font-size:12.5px}.module-head{border-bottom:1px solid var(--line);margin-bottom:30px;padding-bottom:22px}.module-meta{flex-wrap:wrap;align-items:center;gap:9px;margin-bottom:12px;display:flex}.pill{text-transform:uppercase;letter-spacing:.06em;background:var(--panel-alt);border:1px solid var(--line);color:var(--dim);border-radius:20px;padding:3px 9px;font-size:10.5px;font-weight:700}.pill-done{color:var(--green);background:#4ec9a01f;border-color:#4ec9a066}.module-time{color:var(--dim);font-size:11.5px}.module h1{letter-spacing:-.015em;margin:0 0 8px;font-size:31px}.module-summary{color:var(--dim);margin:0;font-size:15.5px}.module-body{flex-direction:column;gap:18px;display:flex}.lead{color:var(--text);margin:0;font-size:18px;line-height:1.55}.prose{color:#ccd4e2;margin:0}code{font-family:var(--mono);background:var(--panel-alt);border:1px solid var(--line);color:var(--gold);border-radius:4px;padding:1px 5px;font-size:.88em}.callout{border:1px solid var(--line);background:var(--panel);border-left-width:3px;border-radius:10px;padding:13px 16px}.callout-title{margin-bottom:4px;font-size:13px;font-weight:700}.callout-text{color:#ccd4e2;font-size:14px}.callout-info{border-left-color:var(--blue)}.callout-info .callout-title{color:var(--blue)}.callout-warn{border-left-color:var(--red)}.callout-warn .callout-title{color:var(--red)}.callout-key{border-left-color:var(--gold);background:#f2c94c0f}.callout-key .callout-title{color:var(--gold)}.bullets h4{color:var(--gold);margin:0 0 8px;font-size:13.5px}.bullets ul{gap:6px;margin:0;padding-left:20px;display:grid}.bullets li{color:#ccd4e2}.bullets li::marker{color:var(--dim)}.terms{gap:8px;margin:0;display:grid}.term-row{background:var(--panel);border:1px solid var(--line);border-radius:9px;padding:10px 13px}.term-row dt{font-family:var(--mono);color:var(--gold);margin-bottom:3px;font-size:13px;font-weight:600}.term-row dd{color:#ccd4e2;margin:0;font-size:13.5px}.code-block{border:1px solid var(--line);background:#0d1119;border-radius:10px;margin:0;overflow:hidden}.code-block figcaption{color:var(--dim);background:var(--panel);border-bottom:1px solid var(--line);font-size:11.5px;font-family:var(--mono);padding:7px 13px}.code-block pre{margin:0;padding:13px;overflow-x:auto}.code-block code{color:#cfe0ff;background:0 0;border:none;padding:0;font-size:12.5px;line-height:1.65}.table-wrap{border:1px solid var(--line);border-radius:10px;overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:13.5px}th{text-align:left;background:var(--panel-alt);color:var(--gold);text-transform:uppercase;letter-spacing:.05em;white-space:nowrap;padding:9px 13px;font-size:11.5px}td{border-top:1px solid var(--line);color:#ccd4e2;vertical-align:top;padding:9px 13px}tbody tr:nth-child(odd){background:#ffffff04}.visual{margin:4px 0}.visual-inner{background:var(--bg-alt);border:1px solid var(--line);border-radius:12px;padding:10px}.visual-svg{width:100%;height:auto;display:block}.visual figcaption{color:var(--dim);text-align:center;margin-top:8px;font-size:12px}.quiz{background:var(--panel);border:1px solid var(--line);border-radius:13px;margin-top:38px;padding:22px}.quiz-head{justify-content:space-between;align-items:center;margin-bottom:14px;display:flex}.quiz-label{text-transform:uppercase;letter-spacing:.09em;color:var(--gold);font-size:11px;font-weight:700}.quiz-count{color:var(--dim);font-size:11.5px}.quiz-prompt{margin:0 0 15px;font-size:16.5px;font-weight:600}.quiz-options{gap:8px;display:grid}.quiz-option{text-align:left;border:1px solid var(--line);background:var(--bg-alt);width:100%;color:var(--text);cursor:pointer;border-radius:9px;align-items:center;gap:11px;padding:11px 13px;font-family:inherit;font-size:14px;transition:border-color .15s,background .15s;display:flex}.quiz-option:hover:not(:disabled){border-color:var(--blue)}.quiz-option:disabled{cursor:default}.quiz-key{background:var(--panel-alt);width:22px;height:22px;color:var(--dim);border-radius:6px;flex:0 0 22px;place-items:center;font-size:11.5px;font-weight:700;display:grid}.quiz-mark{margin-left:auto;font-weight:700}.quiz-option.correct{border-color:var(--green);background:#4ec9a01a}.quiz-option.correct .quiz-mark{color:var(--green)}.quiz-option.wrong{border-color:var(--red);background:#ff6b6b1a}.quiz-option.wrong .quiz-mark{color:var(--red)}.quiz-option.muted{opacity:.42}.quiz-why{background:var(--bg-alt);border-left:3px solid var(--gold);color:#ccd4e2;border-radius:0 8px 8px 0;margin-top:13px;padding:12px 14px;font-size:13.5px;overflow:hidden}.quiz-next{margin-top:15px}.quiz-result{text-align:center;padding:26px 0 8px}.quiz-score{color:var(--gold);font-size:40px;font-weight:800}.quiz-result.perfect .quiz-score{color:var(--green)}.quiz-result p{color:var(--dim);margin:6px 0 16px}.btn{border:1px solid var(--line);background:var(--panel-alt);color:var(--text);cursor:pointer;border-radius:9px;padding:9px 17px;font-family:inherit;font-size:13.5px;font-weight:600;text-decoration:none;transition:transform .12s,filter .15s;display:inline-block}.btn:hover{filter:brightness(1.14)}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--gold);border-color:var(--gold);color:#201a05}.btn-ghost{color:var(--dim);background:0 0}.btn-lg{padding:13px 26px;font-size:15px}.module-nav{border-top:1px solid var(--line);justify-content:space-between;gap:12px;margin-top:32px;padding-top:22px;display:flex}@media (width<=1000px){.app{grid-template-columns:1fr}.sidebar{border-right:none;border-bottom:1px solid var(--line);max-height:260px;position:static}.main{padding:26px 20px 70px}.home h1{font-size:30px}.stats{grid-template-columns:repeat(2,1fr)}.home-part li{grid-template-columns:1fr;gap:3px}}@media (width<=760px),(height<=560px) and (pointer:coarse){html,body,#root{height:auto}.app{height:auto;display:block}.topbar{z-index:30;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);padding:8px 10px;padding-left:max(10px, env(safe-area-inset-left));padding-right:max(10px, env(safe-area-inset-right));background:#10141deb;align-items:center;gap:10px;display:flex;position:sticky;top:0}.topbar-btn{border:1px solid var(--line);background:var(--panel);width:44px;height:44px;color:var(--text);cursor:pointer;border-radius:9px;flex:0 0 44px;font-size:17px;line-height:1}.topbar-title{min-width:0;color:var(--text);white-space:nowrap;text-overflow:ellipsis;flex:1;font-size:14px;font-weight:700;text-decoration:none;overflow:hidden}.topbar-pct{color:var(--gold);font-variant-numeric:tabular-nums;font-size:12px;font-weight:700}.scrim{z-index:40;opacity:0;pointer-events:none;background:#0000008c;transition:opacity .2s;display:block;position:fixed;inset:0}.app.nav-open .scrim{opacity:1;pointer-events:auto}body:has(.app.nav-open){overflow:hidden}.sidebar{z-index:50;border-right:1px solid var(--line);width:min(86vw,330px);height:100%;max-height:none;padding-top:max(20px, env(safe-area-inset-top));overscroll-behavior:contain;-webkit-overflow-scrolling:touch;border-bottom:none;transition:transform .22s;position:fixed;top:0;left:0;transform:translate(-100%)}.app.nav-open .sidebar{transform:translate(0)}.app:not(.nav-open) .sidebar{visibility:hidden}.app.nav-open .sidebar{visibility:visible}.main{padding:20px 16px 64px;padding-left:max(16px, env(safe-area-inset-left));padding-right:max(16px, env(safe-area-inset-right));overflow-y:visible}.nav-item{padding:11px 10px;font-size:14px}.reset{padding:12px;font-size:13px}.home h1{font-size:26px}.home-lead{font-size:15.5px}.module h1{font-size:23px}.module-summary,.lead{font-size:15.5px}.stats{gap:8px}.stats>div{padding:11px 8px}.stats strong{font-size:20px}.module-nav{flex-direction:column-reverse}.module-nav .btn{text-align:center;width:100%}.btn-lg{text-align:center;width:100%;display:block}.btn{min-height:44px;padding:12px 18px}.brand{min-height:44px}.code-block pre{padding:11px}.code-block code{font-size:12px}}