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.certification-path{margin:1.8rem 0 2rem;border:1px solid #9ebbc6;border-top:5px solid var(--orange);border-radius:8px;background:linear-gradient(145deg,#f9fcfd,#edf5f7);overflow:hidden}.certification-head{display:flex;justify-content:space-between;gap:1rem;align-items:flex-start;padding:1.3rem 1.35rem .6rem}.certification-head h3{font-family:Georgia,serif;color:var(--navy);font-size:1.7rem;margin:.1rem 0 .25rem}.certification-head>div>p:last-child{margin:0;color:var(--slate);font-size:.82rem;font-weight:750}.path-badge{background:var(--navy);color:#fff;border-radius:4px;padding:.45rem .6rem;font-size:.72rem;font-weight:850;white-space:nowrap}.path-intro{margin:.2rem 1.35rem 1.2rem;color:#455c69;line-height:1.55}.path-groups{display:grid;gap:.8rem;padding:0 1.1rem 1.1rem}.path-group{display:grid;grid-template-columns:180px 1fr;background:#fff;border:1px solid var(--line);border-radius:7px;overflow:hidden}.path-stage{padding:1rem;background:var(--navy);color:#fff}.path-stage span{color:#6dc0d2;font-size:.7rem;font-weight:900;letter-spacing:.12em}.path-stage h4{margin:.4rem 0 0;font-size:1rem}.path-items{display:grid;padding:.5rem 1rem}.path-items label{display:grid;grid-template-columns:22px 1fr;gap:.65rem;align-items:start;padding:.65rem 0;border-bottom:1px solid #e8edf0;line-height:1.5;cursor:pointer}.path-items label:last-child{border-bottom:0}.path-items input{width:18px;height:18px;margin:.15rem 0 0;accent-color:var(--teal)}.path-items label:has(input:checked) span{text-decoration:line-through;color:var(--slate)}.path-source{border-top:1px solid #bed1d8;background:#e4f0f3;padding:1rem 1.35rem;font-size:.79rem;line-height:1.55;color:#435966}.path-source a{color:var(--teal);font-weight:850;text-decoration:none}
@media(max-width:760px){.certification-head{flex-direction:column}.path-group{grid-template-columns:1fr}.path-stage{padding:.8rem 1rem}.path-stage h4{display:inline;margin-left:.5rem}.path-items{padding:.35rem .8rem}}
.path-callout{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin:1.5rem 0;padding:1.15rem 1.25rem;border:1px solid #afc8d1;border-left:5px solid var(--orange);border-radius:7px;background:#edf6f8}.path-callout h3{color:var(--navy);margin:.1rem 0 .3rem}.path-callout p:last-child{margin:0;color:#4d626e}.flow-shell{padding:1.4rem;border-radius:10px;background:var(--navy);box-shadow:var(--shadow)}.flow-chart{display:flex;align-items:stretch;gap:.55rem}.flow-node{flex:1;min-width:0;display:flex;gap:.7rem;align-items:flex-start;padding:1rem .85rem;border:1px solid rgba(255,255,255,.18);border-radius:7px;background:linear-gradient(145deg,rgba(255,255,255,.1),rgba(255,255,255,.04));color:#fff}.flow-number{width:30px;height:30px;flex:0 0 auto;border-radius:50%;display:grid;place-content:center;background:var(--orange);font-weight:900;font-size:.75rem}.flow-node p{margin:.05rem 0 .3rem;color:#75c7d7;font-size:.58rem;letter-spacing:.12em;font-weight:900}.flow-node h2{margin:0;color:#fff;font-size:.95rem;line-height:1.25}.flow-node small{display:block;margin-top:.45rem;color:#bfd3db;font-size:.7rem}.flow-arrow{align-self:center;color:#65b9cc;font-size:1.2rem;font-weight:900}.flow-caption{margin:1rem 0 0;text-align:center;color:#bdd2da;font-size:.8rem;font-weight:750}.path-checklist-head{display:flex;justify-content:space-between;align-items:end;gap:1rem;margin:2rem 0 1rem}.path-checklist-head h2{font-family:Georgia,serif;color:var(--navy);font-size:2rem;margin:.1rem 0}.path-checklist-head>span{color:var(--slate);font-size:.8rem}.path-groups.standalone{padding:0}.path-groups.standalone+.path-source{border:1px solid #bed1d8;border-radius:7px;margin-top:1rem}.path-groups.standalone .path-group{box-shadow:0 6px 18px rgba(11,33,53,.04)}
@media(max-width:1200px) and (min-width:761px){.topbar nav a{font-size:.8rem;padding:.55rem .45rem}}
@media(max-width:900px){.flow-chart{flex-direction:column}.flow-arrow{transform:rotate(90deg);align-self:center}.flow-node{width:100%}}
@media(max-width:760px){.path-callout,.path-checklist-head{align-items:flex-start;flex-direction:column}.path-callout .secondary{width:100%}.flow-shell{padding:1rem}.path-checklist-head>span{margin-top:-.5rem}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

.scenario-qa{margin:.2rem 0 1.2rem;padding-left:1.5rem}.scenario-qa li{padding:.7rem 0 .8rem .25rem;border-bottom:1px solid var(--line);line-height:1.5}.scenario-qa li::marker{color:var(--teal);font-weight:800}.scenario-qa strong{display:block;color:var(--navy)}.scenario-qa p{margin:.4rem 0 0;color:#3c5260;line-height:1.6}.scenario-takeaway{background:#edf5f6;border-left:3px solid var(--teal);padding:.85rem 1rem;border-radius:4px;margin:1.2rem 0}.scenario-takeaway p:last-child{margin:.2rem 0 0;line-height:1.6}.source-pills a{background:#e3eff2;color:var(--teal);border-radius:4px;padding:.3rem .5rem;font-size:.75rem;font-weight:750;text-decoration:none}.source-pills a:hover,.source-pills a:focus-visible{text-decoration:underline;background:#cce5ed}
.path-item-copy{display:flex;flex-wrap:wrap;align-items:baseline;gap:.25rem .55rem}.path-citation{display:inline-block;color:var(--teal);font-size:.76rem;font-weight:850;text-decoration:none;white-space:nowrap}.path-citation:hover,.path-citation:focus-visible{text-decoration:underline}

/* v15: simpler navigation and consistent ACS answer cards */
.acs-toolbar{position:sticky;top:76px;z-index:12;background:rgba(246,248,250,.96);backdrop-filter:blur(10px);padding:.8rem 0 .25rem;margin-bottom:.75rem}.acs-toolbar .filter-row{margin-bottom:.35rem}.acs-toolbar>p{margin:.35rem 0;color:var(--slate);font-size:.82rem}.acs-review-note{margin:0 0 1rem;padding:.8rem 1rem;border:1px solid #bed2da;border-left:4px solid var(--blue);border-radius:6px;background:#eef6f8;color:#405764;font-size:.82rem;line-height:1.55}.detail-actions{display:flex;align-items:center;justify-content:space-between;margin-bottom:.75rem}.back-to-areas{border:0;background:transparent;color:var(--teal);font-weight:800;padding:.45rem 0;cursor:pointer}.detail-actions .close-detail{position:static;flex:0 0 auto}.element{padding:0;background:#fff;overflow:hidden}.element-head{padding:1rem 1rem 0}.element-prompt{padding:0 1rem;margin:.75rem 0 1rem;font-size:1.02rem;color:#263b49}.element details{border-top:1px solid var(--line)}.element details summary{display:flex;justify-content:space-between;align-items:center;padding:.85rem 1rem;list-style:none;background:#f0f6f7;color:var(--teal);font-weight:850}.element details summary::-webkit-details-marker{display:none}.element details[open] summary{background:#e4f1f4}.element details summary span:last-child{font-size:1.25rem;line-height:1}.element details[open] summary span:last-child{transform:rotate(45deg)}.element-answer{padding:1rem 1.15rem 1.15rem}.element-answer ul{margin:.15rem 0 1rem;padding-left:1.25rem}.element-answer li{line-height:1.65;margin:.45rem 0}.element-answer>p{font-size:.82rem;color:#596c78;margin:.55rem 0}.aircraft-note{background:#fff6ee;border-left:3px solid var(--orange);padding:.75rem .85rem;color:#5a493f!important}.practice-switch{display:flex;gap:.35rem;width:max-content;background:#e3eaed;padding:.25rem;border-radius:7px;margin:0 0 1.25rem}.practice-switch a{padding:.65rem .9rem;border-radius:5px;color:#536570;text-decoration:none;font-weight:800;font-size:.86rem}.practice-switch a.active{background:#fff;color:var(--navy);box-shadow:0 2px 8px rgba(11,33,53,.1)}
.audit-chip{margin-left:auto;border-radius:999px;padding:.25rem .5rem;background:#e1f1e8;color:#246447;font-size:.6rem;font-weight:900;letter-spacing:.08em}.archived-chip{background:#eceff1;color:#64727a}.element.archived{border-style:dashed;background:#fafbfb}.audit-line{color:#26704d!important;font-weight:800}.element-head{display:flex;align-items:center;gap:.55rem}
@media(max-width:760px){.topbar{height:auto;min-height:68px;flex-wrap:wrap;gap:.55rem;padding:.7rem 1rem .45rem}.menu{display:none}.brand{order:1}.search-button{order:2;margin-left:auto}.topbar nav,.topbar nav.open{position:static;display:flex;order:3;width:100%;margin:0;overflow-x:auto;flex-direction:row;align-items:center;background:transparent;padding:0 0 .15rem;border:0;gap:.15rem;scrollbar-width:none}.topbar nav::-webkit-scrollbar{display:none}.topbar nav a{white-space:nowrap;padding:.58rem .7rem;font-size:.79rem}.acs-toolbar{top:113px;margin-left:-.75rem;margin-right:-.75rem;padding:.75rem}.intro{padding-top:1.5rem;gap:1rem}.intro h1{font-size:2.55rem}.source-stamp{display:none}.lede{font-size:1rem;line-height:1.55}.authority-strip{display:none}.mode-grid{grid-template-columns:repeat(2,1fr);gap:.65rem;margin-top:1rem}.mode{min-height:118px;padding:1rem}.home-grid{grid-template-columns:1fr}.integrity-card{display:none}.page-head{padding-top:1.2rem}.detail-panel{scroll-margin-top:125px}.practice-switch{width:100%}.practice-switch a{flex:1;text-align:center}.element-prompt{font-size:.98rem}.section-title small{display:none}}
@media(max-width:420px){.mode-grid{grid-template-columns:1fr 1fr}.mode{min-height:105px}.mode small{font-size:.72rem}.mode b{font-size:.92rem}}

/* v17: compact, answer-first ACS task view */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
.element-section{margin-top:1.5rem}
.task-context{margin-top:1.35rem;border:1px solid #bed1d8;border-radius:7px;background:#f7fafb;overflow:hidden}
.task-context>summary{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1rem 1.1rem;cursor:pointer;list-style:none;color:var(--navy);font-weight:850}
.task-context>summary::-webkit-details-marker{display:none}
.task-context>summary span:last-child{color:var(--teal);font-size:1.2rem;line-height:1;transition:transform .18s ease}
.task-context[open]>summary{background:#eaf3f5;border-bottom:1px solid #bed1d8}
.task-context[open]>summary span:last-child{transform:rotate(45deg)}
.task-context-body{padding:0 1rem 1rem}

@media(max-width:760px){
  main{padding:1rem .8rem 4rem}
  .acs-toolbar{position:relative;top:auto;z-index:1;margin:0 0 .8rem;padding:.65rem;background:#eef4f6;border:1px solid #d2dfe4;border-radius:8px;backdrop-filter:none}
  .acs-toolbar .filter-row{gap:.55rem;margin:0}
  .acs-toolbar>p{display:none}
  .filter-row input,.filter-row select,#global-search{font-size:1rem}
  .acs-toolbar input{width:100%;padding:.7rem .75rem;min-height:44px}
  .segmented{width:100%;overflow:visible}
  .segmented button{flex:1;min-height:44px;padding:.55rem .45rem;font-size:.88rem}
  .detail-panel{margin-top:1rem;padding:1rem;border-radius:7px;scroll-margin-top:122px}
  .detail-panel h2{font-size:clamp(1.75rem,8vw,2.2rem);line-height:1.08;letter-spacing:-.025em;margin:.15rem 0 .7rem}
  .task-objective{display:none}
  .element-section{margin-top:1rem}
  .section-title{margin-bottom:.65rem}
  .section-title h3{font-size:1.12rem}
  .element-head{flex-direction:row!important;align-items:center!important;flex-wrap:wrap;padding:.8rem .85rem 0}
  .element code{font-size:.88rem}
  .audit-chip{margin-left:auto}
  .element-prompt{padding:0 .85rem;margin:.6rem 0 .8rem;font-size:.96rem;line-height:1.45}
  .element details summary{padding:.72rem .85rem;min-height:44px}
  .element-answer{padding:.85rem .95rem 1rem}
  .element-answer li{line-height:1.5;margin:.4rem 0}
  .task-context>summary{min-height:48px;padding:.8rem .9rem}
  .task-context-body{padding:0 .75rem .75rem}
  .task-context .source-grid{gap:.6rem;margin:.75rem 0}
  .task-context .source-grid>div{padding:.75rem}
  .task-context .source-grid p{font-size:.9rem;line-height:1.45;margin:.65rem 0}
}

/* v19: searchable Private Pilot word bank */
.word-bank-callout{width:100%;display:flex;align-items:center;justify-content:space-between;gap:1rem;margin:0 0 1rem;padding:1rem 1.1rem;text-align:left;border:1px solid #b8cdd5;border-left:5px solid var(--orange);border-radius:7px;background:#fff;cursor:pointer;color:var(--teal);font-weight:850}
.word-bank-callout:hover{border-color:var(--teal);box-shadow:0 7px 18px rgba(11,33,53,.07)}
.word-bank-callout span:first-child{display:grid;gap:.2rem;color:var(--navy)}
.word-bank-callout small{color:var(--slate);font-weight:500;line-height:1.45}
.word-toolbar{display:grid;gap:.8rem;margin-bottom:.8rem}
.word-toolbar>input{width:100%;min-height:48px;padding:.8rem .9rem;border:1px solid #bfcdd3;border-radius:7px;background:#fff;font-size:1rem}
.word-toolbar>input:focus{outline:3px solid rgba(22,127,168,.18);border-color:var(--blue)}
.word-bank-note{margin:0 0 1rem;padding:.8rem 1rem;border-left:4px solid var(--blue);background:#eef6f8;color:#405764;line-height:1.55}
.word-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;align-items:start}
.word-card{border:1px solid var(--line);border-radius:8px;background:#fff;overflow:hidden;box-shadow:0 6px 16px rgba(11,33,53,.035);scroll-margin-top:95px}
.word-card.focused{border-color:var(--orange);box-shadow:0 0 0 3px rgba(229,107,47,.13)}
.word-card-head{padding:1rem 1.1rem .4rem}
.word-card-head>span{display:inline-block;color:var(--teal);font-size:.7rem;font-weight:900;letter-spacing:.09em;text-transform:uppercase}
.word-card h2{margin:.35rem 0 0;color:var(--navy);font-family:Georgia,serif;font-size:1.4rem}
.word-simple{margin:.35rem 1.1rem 1rem;color:#314a57;line-height:1.6}
.word-card details{border-top:1px solid var(--line)}
.word-card summary{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.8rem 1.1rem;list-style:none;cursor:pointer;background:#f0f6f7;color:var(--teal);font-size:.86rem;font-weight:850}
.word-card summary::-webkit-details-marker{display:none}
.word-card summary span:last-child{font-size:1.15rem;transition:transform .18s ease}
.word-card details[open] summary span:last-child{transform:rotate(45deg)}
.word-more{padding:.95rem 1.1rem 1.1rem}
.word-more p{margin:.2rem 0 .8rem;color:#425965;line-height:1.55}
.word-trap{padding:.7rem .8rem;border-left:3px solid var(--orange);background:#fff5ef}
.word-sources{display:flex;flex-wrap:wrap;gap:.45rem;margin-top:.8rem}
.word-sources a{padding:.38rem .55rem;border-radius:4px;background:#e3eff2;color:var(--teal);font-size:.76rem;font-weight:800;text-decoration:none}
.word-sources a:hover{text-decoration:underline}

@media(max-width:760px){
  .word-bank-callout{align-items:flex-start;flex-direction:column}
  .word-list{grid-template-columns:1fr}
  .word-card-head{padding:.9rem .9rem .35rem}
  .word-simple{margin:.3rem .9rem .9rem}
  .word-card summary{padding:.75rem .9rem}
  .word-more{padding:.85rem .9rem .95rem}
}

@media(max-width:420px){
  .detail-actions{margin-bottom:.55rem}
  .detail-panel>.eyebrow{margin-bottom:.45rem}
  .audit-chip{font-size:.56rem}
}

/* v18: ACS-ordered study guide */
.study-page-head{padding-bottom:1.25rem;border-bottom:1px solid var(--line)}
.study-page-head h2{margin-right:0}
.study-page-head>p:not(.eyebrow){max-width:760px;margin:.65rem 0;color:#49606d;line-height:1.55}
.study-counts{display:flex;flex-wrap:wrap;gap:.55rem;margin-top:1rem}
.study-counts span{display:inline-flex;align-items:baseline;gap:.35rem;padding:.45rem .65rem;border-radius:5px;background:#e9f2f4;color:#38515e;font-size:.82rem;font-weight:750}
.study-counts b{color:var(--teal);font-size:1rem}
.study-scope-note{margin:1rem 0 1.5rem;padding:.8rem 1rem;border-left:4px solid var(--orange);background:#fff5ef;color:#4f5f68;font-size:.88rem;line-height:1.55}
.study-guide-body{display:grid;gap:2rem}
.study-block{min-width:0}
.study-block-head{display:flex;align-items:flex-end;justify-content:space-between;gap:1rem;margin-bottom:.85rem;padding-bottom:.75rem;border-bottom:2px solid #bdd3da}
.study-block-head h3{margin:.1rem 0 .3rem;color:var(--navy);font-family:Georgia,serif;font-size:1.65rem}
.study-block-head p:last-child{max-width:760px;margin:0;color:#536873;line-height:1.5;font-size:.9rem}
.study-block-head>strong{font-family:Georgia,serif;font-size:2rem;color:var(--teal)}
.risk-block .study-block-head{border-color:#dec3cc}
.risk-block .study-block-head>strong{color:var(--risk)}
.study-group{margin:1rem 0 1.25rem;border:1px solid #c8d7dc;border-radius:8px;overflow:hidden;background:#fff}
.study-group-head{padding:1rem 1.1rem;background:#eef5f6;border-bottom:1px solid #c8d7dc}
.study-group-head code,.study-topic-meta code{color:var(--teal);font-weight:850;font-size:.78rem}
.study-group-head h4{margin:.35rem 0;color:var(--navy);font-size:1.05rem}
.study-group-head p{margin:.3rem 0 0;color:#536873;line-height:1.5;font-size:.88rem}
.study-topic-list{display:grid}
.standalone-topic{margin:.6rem 0;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#fff}
.study-topic{position:relative;display:grid;grid-template-columns:42px minmax(0,1fr);gap:.8rem;padding:1rem 1.1rem;border-bottom:1px solid #e4eaed;scroll-margin-top:110px}
.study-topic:last-child{border-bottom:0}
.study-topic.focused{background:#fff8f3;box-shadow:inset 4px 0 var(--orange)}
.study-topic-number{width:32px;height:32px;border-radius:50%;display:grid;place-content:center;background:var(--navy);color:#fff;font-size:.72rem;font-weight:900}
.risk-block .study-topic-number{background:var(--risk)}
.study-topic-meta{display:flex;align-items:center;flex-wrap:wrap;gap:.5rem}
.study-topic h4{margin:.45rem 0 .55rem;color:var(--navy);font-size:1rem;line-height:1.35}
.study-topic ul{margin:.2rem 0 .75rem;padding-left:1.25rem}
.study-topic li{margin:.35rem 0;line-height:1.55;color:#314a57}
.study-source{margin:.7rem 0 0;padding-top:.65rem;border-top:1px dashed #d6e0e4;color:#60727c;font-size:.75rem;line-height:1.45}

@media(max-width:760px){
  .study-page-head{padding-bottom:.85rem}
  .study-page-head>p:not(.eyebrow){font-size:.92rem}
  .study-counts{margin-top:.75rem}
  .study-counts span{font-size:.76rem}
  .study-scope-note{margin:.8rem 0 1.2rem;padding:.7rem .8rem;font-size:.82rem}
  .study-guide-body{gap:1.5rem}
  .study-block-head{align-items:flex-start}
  .study-block-head h3{font-size:1.35rem}
  .study-block-head p:last-child{font-size:.84rem}
  .study-block-head>strong{font-size:1.55rem}
  .study-group{margin:.75rem 0 1rem}
  .study-group-head{padding:.8rem .85rem}
  .study-topic{grid-template-columns:32px minmax(0,1fr);gap:.6rem;padding:.85rem .8rem}
  .study-topic-number{width:28px;height:28px;font-size:.65rem}
  .study-topic h4{font-size:.96rem}
  .study-topic ul{padding-left:1.05rem}
  .study-topic li{font-size:.93rem;line-height:1.5}
  .study-source{font-size:.72rem}
}