@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/2c55a0e60120577a-s.0-dom-5bn10r2.woff2)format("woff2");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/9c72aa0f40e4eef8-s.1y4-pdgsjb-pw.woff2)format("woff2");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/ad66f9afd8947f86-s.3lvt2whj97whp.woff2)format("woff2");unicode-range:U+1F??}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/5476f68d60460930-s.2uwcyprjm3xu3.woff2)format("woff2");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/2bbe8d2671613f1f-s.0k62hbripvv8p.woff2)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/1bffadaabf893a1e-s.3-6t-g6q0vh0a.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/83afe278b6a6bb3c-s.p.2bn3s6zvc0dyp.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Inter Fallback;src:local(Arial);ascent-override:90.44%;descent-override:22.52%;line-gap-override:0.0%;size-adjust:107.12%}.inter_2fe1ab3d-module__-T-KAq__className{font-family:Inter,Inter Fallback;font-style:normal}.inter_2fe1ab3d-module__-T-KAq__variable{--font-inter:"Inter", "Inter Fallback"}
@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial}}}@layer theme{:root,:host{--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring:where(:not(iframe)){outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.fixed{position:fixed}.relative{position:relative}.m-1{margin:var(--spacing)}.block{display:block}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}}:root{--efly-blue:#123c8c;--efly-blue-deep:#071e55;--efly-yellow:#ffd21f;--efly-white:#fff;--efly-gray:#4b5563;--efly-blue-soft:#123c8c0f;--efly-blue-faint:#123c8c08;--efly-blue-line:#123c8c2e;--efly-blue-muted:#123c8cb8;--efly-deep-soft:#071e5514;--efly-deep-overlay:#071e5547;--efly-deep-shadow:#071e552e;--efly-yellow-soft:#ffd21f29;--efly-yellow-muted:#ffd21f47;--efly-white-strong:#fffffff5;--efly-white-nav:#fffffff7;--efly-white-faint:#ffffff1f;--efly-white-subtle:#ffffff09;--efly-white-quiet:#ffffff06;--efly-success:#16a34a;--efly-success-soft:#16a34a14;--efly-success-line:#16a34a5c;--divider-strong:#071e551a;--divider-medium:#071e5513;--divider-soft:#071e550b;--divider-subtle:#071e5506;--surface-bg:#fff;--sidebar-bg:#ffffffe0;--app-bg:#123c8c05;--shadow-subtle:0 2px 8px #071e550a;--shadow-soft:0 6px 18px #071e550d;--shadow-medium:0 14px 40px #071e5512, 0 3px 12px #071e550b;--smartclass-footer-height:68px;--smartclass-footer-shadow:0 -6px 18px #071e550e;--blue:var(--efly-blue);--deep:var(--efly-blue-deep);--yellow:var(--efly-yellow);--ink:var(--efly-blue-deep);--gray:var(--efly-gray);--mist:var(--efly-white);--line:var(--divider-medium)}*{box-sizing:border-box}html{background:var(--app-bg)}body{color:var(--ink);background:var(--app-bg);font-family:var(--font-inter), Inter, sans-serif;margin:0}button,select{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--yellow);outline-offset:3px}.loading-screen{text-align:center;background:var(--deep);min-height:100vh;color:var(--efly-white);place-content:center;gap:14px;display:grid}.offline-screen{min-height:100vh;color:var(--efly-white);background:var(--deep);text-align:center;place-content:center;gap:14px;padding:30px;display:grid}.offline-screen h1{letter-spacing:-.05em;max-width:600px;margin:0;font-size:clamp(2rem,6vw,4rem)}.offline-screen p{max-width:420px;color:var(--efly-white);opacity:.82;margin:0;font-size:1.1rem;line-height:1.55}.embed-player{background:var(--app-bg);min-height:auto;padding-bottom:82px}.embed-player .player-header{position:sticky}.embed-header{box-shadow:none}.embed-player .header-sub{width:100%;max-width:none;min-height:calc(var(--smartclass-header-height) - 1px);padding-left:max(16px, env(safe-area-inset-left));padding-right:max(16px, env(safe-area-inset-right));margin:0}.embed-player .lesson-content{width:min(100% - 32px,900px);padding-top:clamp(48px,7vw,92px)}.embed-cover{background:var(--mist);min-height:auto;color:var(--ink)}.embed-cover:after{display:none}.embed-cover .cover-content{padding:54px 24px 95px}.embed-cover .eyebrow{color:var(--blue)}.embed-cover .cover-description,.embed-cover .duration{color:var(--gray)}.embed-cover .objectives{border-color:var(--yellow)}.embed-cover .objectives ul{color:var(--gray)}.embed-cover-tools{justify-content:flex-end;padding:14px 18px 0;display:flex}.logo-mark,.brand i{background:var(--yellow);width:30px;height:30px;color:var(--deep);border-radius:50%;place-items:center;font-style:normal;font-weight:900;display:inline-grid}.eyebrow,.activity-kicker{color:var(--blue);letter-spacing:.13em;margin:0 0 10px;font-size:.72rem;font-weight:800}.muted{color:var(--gray)}.brand{color:inherit;letter-spacing:.08em;white-space:nowrap;align-items:center;gap:9px;font-size:.9rem;font-weight:900;text-decoration:none;display:inline-flex}.product-lockup{color:inherit;letter-spacing:.07em;white-space:nowrap;align-items:center;gap:10px;font-size:.82rem;font-weight:900;display:inline-flex}.loading-screen .product-lockup,.offline-screen .product-lockup{color:var(--efly-white);justify-self:center}.efly-logo{width:116px;height:auto;display:block}.mastery{color:var(--deep)!important}.scenario-situation{border-left:3px solid var(--yellow);background:var(--efly-blue-faint);color:var(--gray);padding:14px;font-weight:700}.range-label{color:var(--blue);gap:10px;margin:22px 0;font-weight:800;display:grid}.range-label input{width:100%;accent-color:var(--yellow)}.simulation-state{color:var(--deep);background:var(--efly-blue-soft);letter-spacing:.08em;border-radius:4px;margin:15px 0 0;padding:5px 9px;font-size:.75rem;font-weight:900;display:inline-block}.simulation-state.warning{background:var(--efly-yellow-muted)}.simulation-state.danger{color:var(--efly-white);background:var(--deep)}.toggle-row{border:0;border-top:1px solid var(--line);flex-wrap:wrap;gap:7px;margin:18px 0;padding:12px 0;display:flex}.toggle-row legend{width:100%;color:var(--gray);margin-bottom:5px;font-size:.8rem;font-weight:800}.toggle-row button{border:1px solid var(--line);min-height:39px;color:var(--blue);background:var(--efly-white);border-radius:5px;padding:7px 13px;font-weight:800}.toggle-row button.active{color:var(--efly-white);border-color:var(--blue);background:var(--blue)}.challenge{color:var(--efly-white);background:var(--deep);border:0}.challenge .activity-kicker{color:var(--yellow)}.challenge .range-label{color:var(--efly-white)}.challenge .visual{border:1px solid var(--efly-blue-muted)}.challenge-actions{flex-wrap:wrap;gap:10px;margin-top:18px;display:flex}.cover{min-height:100dvh;color:var(--efly-white);background:linear-gradient(125deg, var(--deep) 0%, var(--blue) 100%);position:relative;overflow:hidden}.cover:not(.embed-cover){flex-direction:column;height:100dvh;display:flex}.cover:after{content:"";border:1px solid var(--efly-white-faint);width:72vw;height:72vw;box-shadow:0 0 0 70px var(--efly-white-subtle), 0 0 0 140px var(--efly-white-quiet);border-radius:50%;position:absolute;top:-22vw;right:-25vw}.cover-header{z-index:1;width:100%;max-width:1220px;color:var(--efly-white);opacity:.82;letter-spacing:.12em;flex:none;justify-content:space-between;gap:16px;margin:0 auto;padding:clamp(18px,2.5vh,26px) 34px;font-size:.76rem;display:flex;position:relative}.cover-header .product-lockup{color:var(--efly-white)}.cover-content{z-index:1;flex-direction:column;flex:auto;justify-content:center;width:min(100%,828px);min-height:0;margin:0 auto;padding:clamp(20px,4vh,46px) 34px clamp(54px,8vh,76px);display:flex;position:relative}.cover .eyebrow{color:var(--yellow)}.cover h1{letter-spacing:-.06em;max-width:700px;margin:0;font-size:clamp(2.7rem,5.8vw,5.4rem);line-height:.98}.cover-description{max-width:590px;color:var(--efly-white);opacity:.88;margin:clamp(16px,2.4vh,22px) 0 clamp(10px,1.8vh,16px);font-size:clamp(1.05rem,1.7vw,1.25rem);line-height:1.5}.duration{color:var(--efly-white);opacity:.78;margin:0;font-weight:700}.objectives{border-left:2px solid var(--yellow);margin:clamp(20px,3.4vh,30px) 0;padding-left:22px}.objectives p{margin:0 0 6px;font-weight:800}.objectives ul{color:var(--efly-white);opacity:.88;margin:0;padding-left:20px;line-height:1.6}.review-notice{z-index:1;max-width:550px;color:var(--efly-white);opacity:.78;font-size:.75rem;position:absolute;bottom:16px;left:34px;right:34px}.button{border:0;border-radius:8px;min-height:44px;padding:11px 18px;font-weight:800;transition:transform .18s,box-shadow .18s,background .18s}.button:hover{transform:translateY(-1px)}.button-primary{background:var(--yellow);color:var(--deep);box-shadow:0 8px 20px var(--efly-deep-soft)}.button-secondary{color:var(--efly-white);background:var(--blue)}.button.large{padding:16px 25px;font-size:1rem}.player{--smartclass-header-height:84px;--lesson-navigation-reserve:110px;background:var(--app-bg);min-height:100vh;padding-bottom:110px}.embed-player{--smartclass-header-height:62px}.player-header{z-index:10;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);box-shadow:var(--shadow-subtle);background:#ffffffeb;border-bottom:0;position:sticky;top:0}.header-top{max-width:1180px;min-height:calc(var(--smartclass-header-height) - 1px);align-items:center;gap:25px;margin:auto;padding:12px 28px;display:flex}.header-course{flex:1;gap:2px;min-width:0;display:grid}.header-course span{color:var(--blue);letter-spacing:.11em;font-size:.67rem;font-weight:800}.header-course strong{text-overflow:ellipsis;white-space:nowrap;font-size:.92rem;overflow:hidden}.header-actions{align-items:center;gap:9px;display:flex}.language-switch{border:1px solid var(--line);border-radius:6px;gap:2px;padding:3px;display:flex}.language-switch button{color:var(--gray);background:0 0;border:0;border-radius:4px;padding:5px 8px;font-size:.71rem;font-weight:900}.language-switch button[aria-pressed=true]{background:var(--deep);color:var(--efly-white)}.icon-button{width:35px;height:35px;color:var(--blue);background:var(--efly-blue-soft);border:0;border-radius:6px;place-items:center;font-size:1.3rem;display:grid}.progress-line{background:var(--efly-blue-faint);height:4px}.progress-line span{background:var(--yellow);height:100%;transition:width .35s;display:block}.header-sub{max-width:1180px;color:var(--gray);justify-content:flex-end;align-items:center;gap:12px;margin:auto;padding:8px 28px;font-size:.75rem;display:flex}.header-sub strong{color:var(--blue)}.lesson-section-navigation{z-index:9;padding:8px max(12px, env(safe-area-inset-left)) 9px;background:var(--sidebar-bg);box-shadow:var(--shadow-subtle);border-bottom:0;gap:8px;display:grid;position:sticky;top:0}.section-navigation-heading{display:none}.section-list{overscroll-behavior-x:contain;scrollbar-width:none;touch-action:pan-x;gap:7px;display:flex;overflow-x:auto}.section-list::-webkit-scrollbar{display:none}.section-item{width:36px;min-height:36px;color:var(--gray);background:0 0;border:0;border-radius:50%;flex:0 0 36px;place-items:center;padding:0;transition:background .18s,color .18s;display:grid;position:relative}.section-marker{place-items:center;display:grid}.section-number{border:1px solid var(--efly-blue-line);width:29px;height:29px;color:var(--gray);background:var(--efly-white);border-radius:50%;place-items:center;font-size:.65rem;font-weight:800;display:grid}.section-title{display:none}.section-complete{width:14px;height:14px;color:var(--efly-white);background:var(--efly-success);border-radius:50%;place-items:center;font-size:.58rem;font-weight:900;display:grid;position:absolute;bottom:-1px;right:-1px}.section-item.section-completed .section-number{border-color:var(--efly-success);color:var(--efly-success)}.section-item.section-current{background:var(--efly-blue-soft)}.section-item.section-current .section-number{border-color:var(--blue);color:var(--efly-white);background:var(--blue)}.mobile-current-section{min-width:0;color:var(--deep);align-items:center;gap:8px;font-size:.8rem;display:flex}.mobile-current-section span{color:var(--blue);font-weight:900}.mobile-current-section strong{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.section-progress{color:var(--gray);grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:5px 8px;display:grid}.section-progress p,.section-progress>strong{display:none}.section-progress-position{color:var(--blue);font-variant-numeric:tabular-nums;grid-area:1/1;font-size:.72rem;font-weight:900}.section-progress>strong{color:var(--blue);font-variant-numeric:tabular-nums;grid-area:1/3;font-size:.72rem;font-weight:900;display:block}.section-progress-track{background:var(--efly-blue-faint);border-radius:999px;grid-area:1/2;height:3px;overflow:hidden}.section-progress-track span{border-radius:inherit;background:var(--blue);height:100%;transition:width .2s,background .2s;display:block}.section-progress.complete .section-progress-track span{background:var(--efly-success)}.section-complete-note{color:var(--efly-success);grid-column:1/-1;font-size:.72rem;font-weight:800}.lesson-content{background:var(--surface-bg);width:min(900px,100% - 48px);box-shadow:var(--shadow-medium);border-radius:16px;margin:16px auto 22px;padding:clamp(48px,7vw,92px) clamp(22px,3.5vw,40px) 34px}.lesson-workspace{width:100%;min-width:0}.efly-mentor-panel{width:min(900px, calc(100% - (var(--page-gutter) * 2)));background:var(--sidebar-bg);min-height:235px;box-shadow:var(--shadow-subtle);border-top:0;border-radius:12px;flex-direction:column;margin:18px auto 26px;display:flex;overflow:hidden}.mentor-panel-header{border-bottom:1px solid var(--divider-subtle);padding:20px 20px 16px}.mentor-panel-header h2{color:var(--deep);letter-spacing:-.02em;margin:0;font-size:1rem}.mentor-panel-header p{color:var(--gray);margin:5px 0 0;font-size:.78rem}.mentor-panel-messages{min-height:0;color:var(--gray);flex:1;padding:30px 20px;overflow-y:auto}.mentor-panel-messages p{color:var(--gray);margin:0;font-size:.75rem}.mentor-empty-title{font-weight:700;color:var(--deep)!important;font-size:.82rem!important}.mentor-empty-copy{max-width:220px;line-height:1.55;margin-top:7px!important}.mentor-subscription-state{justify-items:start;gap:0;display:grid}.mentor-requires-subscription{font-weight:700;color:var(--blue)!important;margin-top:18px!important}.mentor-subscribe-button{min-height:44px;color:var(--deep);background:var(--yellow);border-radius:7px;justify-content:center;align-items:center;margin-top:14px;padding:10px 14px;font-size:.78rem;font-weight:800;text-decoration:none;transition:transform .18s,box-shadow .18s;display:inline-flex}.mentor-subscribe-button:hover{box-shadow:0 6px 16px var(--efly-deep-soft);transform:translateY(-1px)}.mentor-panel-input{padding:12px 14px max(14px, env(safe-area-inset-bottom));border:0;border-top:1px solid var(--divider-soft);color:var(--gray);background:var(--efly-white);border-radius:0;grid-template-columns:minmax(0,1fr) 35px;align-items:center;gap:7px;margin:0;font-size:.78rem;display:grid}.mentor-panel-input input{width:100%;min-width:0;color:var(--deep);font:inherit;background:0 0;border:0;outline:0}.mentor-panel-input input::placeholder{color:var(--gray);opacity:.78}.mentor-panel-input input:disabled{cursor:not-allowed;color:var(--gray);opacity:1}.mentor-panel-input.is-disabled{background:#ffffffb8}.mentor-panel-input button{width:35px;height:35px;color:var(--efly-white);background:var(--blue);opacity:.45;border:0;border-radius:6px;place-items:center;display:grid}.mentor-panel-input button:not(:disabled){opacity:1}.section-label{align-items:center;gap:12px;margin-bottom:30px;display:flex}.section-label span{color:var(--efly-white);background:var(--blue);border-radius:50%;place-items:center;width:31px;height:31px;font-size:.7rem;font-weight:900;display:grid}.section-label p{color:var(--gray);letter-spacing:.1em;text-transform:uppercase;margin:0;font-size:.8rem;font-weight:800}.narration-controls{border:1px solid var(--line);background:var(--efly-white);border-radius:6px;align-items:center;gap:3px;margin-left:auto;padding:2px;display:inline-flex}.narration-control{min-width:30px;min-height:30px;color:var(--blue);background:0 0;border:0;border-radius:4px;place-items:center;padding:0;font-size:.82rem;display:grid}.narration-control:hover:not(:disabled){background:var(--efly-blue-soft)}.narration-control:disabled{opacity:.4;cursor:not-allowed}.block,.activity{margin:0 0 38px}.block h1,.block h2,.activity h2{letter-spacing:-.035em;line-height:1.05}.block h2,.activity h2{margin:0 0 14px;font-size:clamp(1.6rem,3vw,2.35rem)}.block p,.activity p{line-height:1.7}.hero{grid-template-columns:1.05fr .95fr;align-items:center;gap:clamp(24px,5vw,70px);padding:15px 0 45px;display:grid}.hero h1{margin:0;font-size:clamp(2.65rem,6vw,4.7rem)}.hero>div>p:last-child{max-width:520px;color:var(--gray);margin:22px 0 0;font-size:1.13rem}.visual{background:var(--efly-blue-soft);min-height:245px;color:var(--blue);border-radius:15px;position:relative;overflow:hidden}.visual-airfoil{background:var(--efly-blue-faint)}.visual svg{width:100%;height:100%;position:absolute;inset:0}.wing{fill:var(--deep)}.stream{fill:none;stroke:var(--blue);stroke-width:4px;stroke-dasharray:9 7;opacity:.7}.angle{stroke:var(--yellow);stroke-width:5px}.visual-label{letter-spacing:.13em;font-size:.65rem;font-weight:900;position:absolute;bottom:17px;left:20px}.block figcaption{color:var(--gray);margin-top:9px;font-size:.8rem}.prose{max-width:700px}.highlight{border-left:4px solid var(--yellow);background:var(--efly-yellow-soft);padding:27px 30px}.highlight p:last-child{color:var(--deep);margin:0;font-size:1.3rem;font-weight:700;line-height:1.5}.definition{border-top:5px solid var(--blue);background:var(--efly-white);box-shadow:0 7px 25px var(--efly-deep-soft);padding:26px 28px}.definition p:last-child{max-width:690px;color:var(--gray);margin-bottom:0}.aviation-term{border:1px solid var(--line);background:var(--efly-white);padding:31px}.aviation-term>div{flex-wrap:wrap;align-items:baseline;gap:9px 16px;display:flex}.aviation-term h2{margin:0}.aviation-term strong{color:var(--blue);letter-spacing:.04em;font-size:1.05rem}.aviation-term span{color:var(--efly-white);background:var(--deep);border-radius:4px;padding:3px 8px;font-size:.75rem;font-weight:900}.aviation-term p{color:var(--gray);margin:18px 0 0}.two-column{grid-template-columns:1fr 1fr;align-items:center;gap:clamp(26px,5vw,70px);display:grid}.two-column p{color:var(--gray);font-size:1.05rem}.hotspots-block{background:var(--efly-white);border:1px solid var(--line);padding:28px}.hotspot-canvas{position:relative}.visual-instruments{background:var(--deep);justify-content:space-evenly;align-items:center;gap:9px;padding:22px;display:flex}.instrument{aspect-ratio:1;border:7px solid var(--efly-blue-muted);background:radial-gradient(circle, var(--blue) 0 2px, var(--efly-white) 3px 5px, var(--deep) 6px);width:min(20%,120px);color:var(--efly-white);border-radius:50%;place-items:end center;padding-bottom:20%;font-size:clamp(.6rem,1.5vw,.9rem);font-weight:900;display:grid;position:relative}.instrument i{background:var(--yellow);transform-origin:bottom;width:2px;height:35%;position:absolute;bottom:50%}.hotspot{border:2px solid var(--efly-white);background:var(--blue);width:35px;height:35px;color:var(--efly-white);box-shadow:0 3px 10px var(--efly-deep-soft);border-radius:50%;place-items:center;font-size:.62rem;font-weight:900;display:grid;position:absolute;transform:translate(-50%,-50%)}.hotspot.is-active{background:var(--yellow);color:var(--deep);transform:translate(-50%,-50%)scale(1.13)}.hotspot span{color:var(--deep);font-size:.65rem;position:absolute;top:calc(100% + 5px)}.hotspot-detail{min-height:104px;padding:16px 5px 0}.hotspot-detail h3{margin:0 0 7px}.hotspot-detail p{color:var(--gray);margin:0}.accordion details{border-top:1px solid var(--line)}.accordion details:last-child{border-bottom:1px solid var(--line)}.accordion summary{cursor:pointer;padding:17px 4px;font-weight:800}.accordion details p{color:var(--gray);margin:0;padding:0 4px 16px}.tabs [role=tablist]{border-bottom:1px solid var(--line);gap:7px;display:flex}.tabs [role=tab]{color:var(--gray);background:0 0;border:0;border-bottom:3px solid #0000;padding:11px 5px;font-weight:800}.tabs [role=tab][aria-selected=true]{border-color:var(--yellow);color:var(--blue)}.tabs article{padding:20px 0 5px}.tabs h3{margin:0}.tabs article p{color:var(--gray)}.timeline article,.steps article{grid-template-columns:55px 1fr;gap:20px;padding-bottom:22px;display:grid;position:relative}.timeline article:not(:last-child):before{content:"";border-left:2px solid var(--efly-blue-line);position:absolute;top:39px;bottom:0;left:14px}.timeline span,.steps span{z-index:1;width:30px;height:30px;color:var(--blue);background:var(--efly-blue-soft);border-radius:50%;place-items:center;font-size:.65rem;font-weight:900;display:grid;position:relative}.steps span{color:var(--deep);background:var(--yellow)}.timeline h3,.steps h3{margin:4px 0}.timeline p,.steps p{color:var(--gray);margin:0}.comparison>div{background:var(--line);grid-template-columns:1fr 1fr;gap:1px;display:grid}.comparison article{background:var(--efly-white);padding:26px}.comparison article:last-child{background:var(--efly-blue-soft)}.comparison h3{color:var(--blue);margin:0 0 10px}.comparison p{color:var(--gray);margin:0}.formula{background:var(--deep);color:var(--efly-white);padding:30px}.formula .eyebrow{color:var(--yellow)}.formula output{width:fit-content;color:var(--yellow);border:1px solid var(--efly-blue-muted);margin:23px 0;padding:16px 20px;font-family:inherit;font-size:clamp(1.2rem,3vw,1.8rem);display:block}.media{background:var(--efly-white);border:1px solid var(--line);padding:26px}.media video,.media audio{width:100%}.transcript{color:var(--gray);font-size:.85rem}.callout{padding:27px 29px}.callout.note{background:var(--efly-blue-soft);border-left:4px solid var(--blue)}.callout.warning{background:var(--efly-yellow-soft);border-left:4px solid var(--yellow)}.callout .eyebrow{margin-bottom:6px}.callout h2{margin-bottom:7px;font-size:1.5rem}.callout p:last-child{color:var(--gray);margin:0}.activity{background:var(--efly-white);border:1px solid var(--line);box-shadow:0 8px 25px var(--efly-deep-soft);padding:clamp(25px,5vw,42px)}.choice-grid{gap:9px;margin-top:24px;display:grid}.choice-grid.two{grid-template-columns:1fr 1fr}.choice{border:1px solid var(--line);background:var(--efly-white);min-height:52px;color:var(--ink);text-align:left;border-radius:7px;padding:12px 16px;font-weight:700}.choice:not(:disabled):hover{border-color:var(--blue);background:var(--efly-blue-soft)}.choice.correct{border-color:var(--efly-success);background:var(--efly-success-soft)}.choice.incorrect{border-color:var(--deep);background:var(--efly-blue-faint)}.feedback{color:var(--gray);border-left:3px solid var(--blue);background:var(--efly-blue-soft);margin-top:18px;padding:14px 16px;line-height:1.55}.feedback-symbol{width:1.25rem;height:1.25rem;color:var(--blue);border:1px solid;border-radius:50%;place-items:center;margin-right:8px;font-weight:900;display:inline-grid}.feedback.is-correct{border-color:var(--efly-success);background:var(--efly-success-soft)}.feedback.is-correct .feedback-symbol{color:var(--efly-success)}.feedback.is-incorrect{border-color:var(--deep);background:var(--efly-blue-faint)}.feedback.is-incorrect .feedback-symbol{color:var(--deep)}.match-row{grid-template-columns:1fr 1fr;align-items:center;gap:12px;margin:9px 0;display:grid}.match-row span{font-weight:800}.match-row select{border:1px solid var(--line);background:var(--efly-white);border-radius:6px;width:100%;min-height:43px;padding:0 9px}.order-list{padding:0;list-style:none}.order-list li{border:1px solid var(--line);border-radius:6px;justify-content:space-between;align-items:center;gap:14px;margin:7px 0;padding:11px 12px;font-weight:700;display:flex}.order-list button{width:31px;height:31px;color:var(--blue);background:var(--efly-blue-soft);border:0;border-radius:4px;margin-left:4px;font-weight:900}.summary{color:var(--efly-white);background:var(--deep);padding:clamp(28px,5vw,55px)}.summary .eyebrow{color:var(--yellow)}.summary h2{max-width:460px}.summary article{border-top:1px solid var(--efly-blue-muted);grid-template-columns:55px 1fr;align-items:start;gap:8px;display:grid}.summary article span{color:var(--yellow);padding-top:18px;font-weight:900}.summary article p{margin:15px 0;font-size:1.05rem}.mentor-button{width:100%;color:var(--blue);border:1px dashed var(--efly-blue-muted);text-align:center;background:0 0;border-radius:8px;margin:45px auto 10px;padding:16px;font-size:.84rem;display:block}.mentor-button strong{margin-left:5px}.lesson-navigation{z-index:15;background:var(--surface-bg);min-height:75px;box-shadow:var(--smartclass-footer-shadow);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-top:0;justify-content:space-between;align-items:center;gap:18px;padding:13px max(24px,50vw - 450px);display:flex;position:fixed;bottom:0;left:0;right:0}.nav-link{color:var(--blue);background:0 0;border:0;padding:10px 0;font-weight:800}.nav-link:disabled{opacity:.3;cursor:default}.dev-page{max-width:850px;margin:auto;padding:80px 30px}.dev-page h1{letter-spacing:-.05em;margin-top:0;font-size:clamp(2.3rem,5vw,4rem)}.lesson-list{margin-top:40px}.lesson-row{background:var(--efly-white);border:1px solid var(--line);justify-content:space-between;align-items:center;gap:30px;margin:12px 0;padding:23px;display:flex}.lesson-row h2{margin:0 0 6px}.lesson-row .eyebrow{margin-bottom:5px}.lesson-row .muted{margin:0;font-size:.85rem}.lesson-error{background:var(--efly-white);border-left:5px solid var(--deep);max-width:760px;box-shadow:0 8px 25px var(--efly-deep-soft);margin:15vh auto;padding:35px}.lesson-error h1{letter-spacing:-.04em;margin:0 0 14px}.lesson-error pre{color:var(--deep);background:var(--efly-blue-faint);white-space:pre-wrap;padding:14px;overflow-x:auto}@media (max-width:700px){.cover:not(.embed-cover){height:auto;min-height:100dvh}.cover-header{padding:20px 22px}.cover-header>span:last-child{display:none}.cover-content{flex:none;padding:80px 24px 115px}.cover h1{font-size:clamp(3rem,15vw,4.7rem)}.review-notice{left:24px;right:24px}.header-top{gap:10px;min-height:61px;padding:10px 18px}.header-course{display:none}.header-actions{margin-left:auto}.desktop-only{display:none}.header-sub{padding:8px 18px}.lesson-content{width:min(100% - 32px,900px);padding-top:34px}.hero,.two-column{grid-template-columns:1fr}.hero{padding-top:4px}.hero .visual{order:-1;min-height:190px}.visual{min-height:205px}.hotspots-block{padding:18px}.instrument{border-width:4px}.hotspot{width:31px;height:31px}.hotspot span{display:none}.comparison>div{grid-template-columns:1fr}.choice-grid.two{grid-template-columns:1fr 1fr}.match-row{grid-template-columns:1fr;gap:5px;margin:15px 0}.activity{padding:23px 18px}.lesson-navigation{min-height:69px;padding:11px 17px}.lesson-navigation .button{min-height:44px}.mentor-button{margin-top:31px}.lesson-row{flex-direction:column;align-items:flex-start;gap:15px}.lesson-row .button{text-align:center;width:100%}.efly-mentor-panel{width:min(900px,100% - 32px);min-height:205px}}@media (max-width:699px){.player:not(.embed-player){--mobile-navigation-offset:61px}.embed-player{--mobile-navigation-offset:54px}.lesson-section-navigation{top:var(--mobile-navigation-offset)}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}.section-state{min-height:220px;color:var(--gray);border:1px solid var(--line);text-align:center;background:#fff;place-items:center;padding:24px;display:grid}.section-state.error{color:var(--deep);background:var(--efly-blue-faint);gap:12px}.section-state p{margin:0}:root{--content-max-width:900px;--page-gutter:clamp(12px, 3vw, 48px);--tap-target:44px}html,body{max-width:100%;overflow-x:clip}button,select,input[type=range],summary{touch-action:manipulation}.button,.choice,.mentor-button,.nav-link,.section-item,.hotspot,.order-list button,.toggle-row button{min-height:var(--tap-target)}.icon-button{min-width:var(--tap-target);min-height:var(--tap-target);width:var(--tap-target);height:var(--tap-target)}.language-switch button{min-width:32px;min-height:36px}.lesson-content{width:min(var(--content-max-width), calc(100% - (var(--page-gutter) * 2)));touch-action:pan-y pinch-zoom}.lesson-navigation{padding-left:max(var(--page-gutter), env(safe-area-inset-left));padding-right:max(var(--page-gutter), env(safe-area-inset-right));padding-bottom:max(13px, env(safe-area-inset-bottom))}.embed-player .lesson-content{width:min(var(--content-max-width), calc(100% - (var(--page-gutter) * 2)))}@media (max-width:520px){.header-sub{padding-left:max(12px, env(safe-area-inset-left));padding-right:max(12px, env(safe-area-inset-right));flex-wrap:wrap;gap:8px}.header-sub>span,.header-sub>strong{white-space:nowrap;font-size:.68rem}.embed-player .header-sub .language-switch{margin-left:0}.embed-player .header-sub{min-height:0}.embed-player .lesson-content{padding-top:25px}.highlight,.definition,.aviation-term,.formula,.media,.callout{padding:21px 18px}.hotspots-block{padding:14px}.visual-instruments{padding:14px 8px}.lesson-navigation{gap:10px}.lesson-navigation .button,.lesson-navigation .nav-link{font-size:.88rem}}@media (max-width:380px){.language-switch{gap:0;padding:2px}.language-switch button{min-width:29px;padding-inline:5px}.header-sub{gap:5px 8px}.header-sub>span,.header-sub>strong{font-size:.64rem}.lesson-content{border-radius:14px;width:calc(100% - 24px);padding:34px 20px 28px}.choice-grid.two{grid-template-columns:1fr}.activity{padding:20px 14px}.block,.activity{margin-bottom:32px}.lesson-navigation{min-height:66px;padding-inline:12px}.lesson-navigation .button{padding-inline:12px}.mentor-subscribe-button{width:100%}.nav-link{padding-inline:2px}}@media (min-width:700px){:root{--sidebar-width:clamp(232px, 20vw, 250px)}.player{padding-left:var(--sidebar-width)}.lesson-section-navigation{z-index:20;width:var(--sidebar-width);padding:22px 12px max(18px, env(safe-area-inset-bottom));background:var(--sidebar-bg);border:0;flex-direction:column;gap:0;display:flex;position:fixed;top:0;bottom:0;left:0;overflow-y:auto;box-shadow:4px 0 16px #071e5506}.section-navigation-heading{padding:0 10px 16px;display:block}.section-navigation-heading p{color:var(--blue);letter-spacing:.11em;text-transform:uppercase;margin:0;font-size:.7rem;font-weight:800}.section-list{gap:6px;display:grid;overflow:visible}.section-item{width:100%;min-height:52px;color:var(--gray);cursor:pointer;text-align:left;border-radius:8px;flex:none;grid-template-columns:50px minmax(0,1fr) 22px;place-items:center start;padding:8px 9px 8px 5px;transition:background-color .18s,color .18s,transform .18s;display:grid}.section-marker{align-self:stretch;width:50px;position:relative}.section-marker:after{content:"";border-left:1px solid #4b556329;position:absolute;top:34px;bottom:-14px;left:14px}.section-item.is-last .section-marker:after{display:none}.section-number{z-index:1;width:29px;height:29px;font-size:.64rem;transition:color .18s,border-color .18s,background-color .18s,box-shadow .18s;position:relative}.section-title{min-width:0;color:var(--gray);overflow-wrap:anywhere;font-size:.82rem;font-weight:600;line-height:1.35;transition:color .18s;display:block}.section-complete{width:auto;height:auto;color:var(--efly-success);opacity:.82;background:0 0;justify-self:end;font-size:.9rem;transition:opacity .18s,transform .18s;position:static}.section-item.section-completed{color:var(--deep)}.section-item.section-completed .section-number{border-color:var(--efly-success);color:var(--efly-success)}.section-item.section-completed .section-title{color:var(--deep)}.section-item.section-completed .section-marker:after{border-color:#16a34a47}.section-item.section-current{color:var(--deep);background:var(--efly-blue-soft)}.section-item.section-current:before{content:"";background:var(--yellow);border-radius:3px;width:3px;position:absolute;top:10px;bottom:10px;left:0}.section-item.section-current .section-marker:after{border-color:var(--efly-blue-muted)}.section-item.section-current .section-title{color:var(--deep);font-weight:700}.section-item.section-pending .section-number{color:var(--gray);border-color:#4b556340}@media (hover:hover) and (pointer:fine){.section-item:hover{color:var(--deep);background:#123c8c0b;transform:translate(3px)}.section-item:hover .section-title{color:var(--deep)}.section-item.section-pending:hover .section-number{color:var(--blue);border-color:#123c8c61}.section-item:hover .section-marker:after{border-color:#123c8c3d}.section-item.section-completed:hover .section-number{border-color:var(--efly-success);box-shadow:0 0 0 2px var(--efly-success-soft)}.section-item.section-completed:hover .section-complete{opacity:1;transform:translate(1px)}.section-item.section-current:hover{background:var(--efly-blue-soft);transform:translate(2px)}}.section-item:focus-visible{outline-offset:2px;color:var(--deep);background:#123c8c0b;outline:2px solid #123c8c9e;transform:translate(3px)}.section-item:focus-visible .section-title{color:var(--deep)}.section-item.section-current:focus-visible{background:var(--efly-blue-soft);transform:translate(2px)}.mobile-current-section{display:none}.section-progress{border-top:0;grid-template-columns:minmax(0,1fr) auto;gap:8px;margin-top:auto;padding:20px 10px 0;box-shadow:0 -10px 18px -20px #071e5552}.section-progress p{color:var(--blue);letter-spacing:.1em;text-transform:uppercase;grid-column:1/-1;margin:0;font-size:.7rem;font-weight:800;display:block}.section-progress-position{color:var(--deep);grid-area:2/1;align-self:center;font-size:.8rem}.section-progress>strong{color:var(--blue);font-variant-numeric:tabular-nums;grid-area:2/2;align-self:center;margin:0;font-size:.76rem;font-weight:800;display:block}.section-progress-track{grid-area:3/1/auto/-1;height:5px}.section-progress.complete>strong{color:var(--efly-success)}.section-complete-note{font-size:.72rem}.lesson-navigation{left:var(--sidebar-width)}}@media (prefers-reduced-motion:reduce){.section-item,.section-number,.section-title,.section-complete{transition:none}.section-item:hover,.section-item:focus-visible,.section-item.section-current:hover,.section-item.section-current:focus-visible{transform:none}}@media (min-width:1180px){:root{--mentor-panel-width:clamp(280px, 21vw, 320px)}.player{padding-bottom:0}.player-header{margin-right:var(--mentor-panel-width)}.player-header .header-top{max-width:none}.lesson-workspace{grid-template-columns:minmax(0, 1fr) var(--mentor-panel-width);min-height:calc(100dvh - var(--smartclass-header-height) + var(--lesson-navigation-reserve));padding:0 0 0 var(--page-gutter);align-items:start;gap:0;display:grid}.lesson-workspace .lesson-content{width:min(var(--content-max-width), 100%);padding-bottom:calc(34px + var(--lesson-navigation-reserve));margin:22px auto 0}.efly-mentor-panel{width:100%;height:100dvh;min-height:0;margin:calc(-1 * var(--smartclass-header-height)) 0 0;background:var(--sidebar-bg);border:0;border-radius:0;align-self:start;position:sticky;top:0;box-shadow:-6px 0 18px #071e5506}.lesson-section-navigation{padding-bottom:0}.section-progress{width:calc(100% + 24px);height:var(--smartclass-footer-height);min-height:var(--smartclass-footer-height);background:var(--surface-bg);box-shadow:var(--smartclass-footer-shadow);grid-template-rows:auto 5px;grid-template-columns:minmax(0,1fr) auto;align-content:center;gap:6px 10px;margin:auto -12px 0;padding:10px 22px}.section-progress p{grid-area:1/1}.section-progress-position,.section-complete-note{display:none}.section-progress>strong{grid-area:1/2}.section-progress-track{grid-area:2/1/auto/-1}.lesson-navigation{right:var(--mentor-panel-width);height:var(--smartclass-footer-height);min-height:var(--smartclass-footer-height);background:var(--surface-bg);box-shadow:var(--smartclass-footer-shadow);padding-top:12px;padding-bottom:12px}.mentor-panel-input{height:var(--smartclass-footer-height);min-height:var(--smartclass-footer-height);background:var(--surface-bg);box-shadow:var(--smartclass-footer-shadow);border-top:0;grid-template-columns:minmax(0,1fr) 44px;padding:10px 14px}.mentor-panel-input button{width:44px;height:44px}}@media (min-width:700px) and (max-width:899px){:root{--sidebar-width:clamp(210px, 28vw, 230px)}.lesson-section-navigation{padding-inline:9px}.section-item{grid-template-columns:46px minmax(0,1fr) 18px;padding-right:5px}.section-marker{width:46px}.section-title{font-size:.76rem}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}