/* ==========================================================
   SimpleAIHub — Lesson 26
   What Are Embeddings?
========================================================== */

.lesson26-page,
.lesson26-page * {
    box-sizing: border-box;
}

.lesson26-page {
    min-width: 0;
    overflow-x: clip;
}

.lesson26-content {
    width: 100%;
    min-width: 0;
    padding: 0 0 60px;
    color: #172033;
}

.lesson26-breadcrumb {
    margin-bottom: 18px;
    color: #667085;
    font-size: 14px;
}

.lesson26-breadcrumb a {
    color: #5b21b6;
    text-decoration: none;
}

.lesson26-breadcrumb span {
    padding: 0 7px;
}

.lesson26-hero {
    padding-bottom: 28px;
    border-bottom: 1px solid #e7eaf0;
}

.lesson26-label,
.lesson26-practice-label,
.lesson26-quiz-label,
.lesson26-recap-label {
    color: #5b21b6;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: .07em;
}

.lesson26-hero h1 {
    margin: 7px 0 12px;
    color: #172033;
    font-size: 46px;
    line-height: 1.08;
}

.lesson26-hero p {
    max-width: 800px;
    margin: 0;
    color: #475467;
    font-size: 18px;
    line-height: 1.7;
}

.lesson26-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 16px;
    color: #667085;
    font-size: 14px;
}

.lesson26-objectives {
    margin: 24px 0;
    padding: 20px;
    border: 1px solid #e4e7ec;
    border-radius: 12px;
    background: #f8fafc;
}

.lesson26-objectives h2 {
    margin: 0 0 10px;
    font-size: 21px;
}

.lesson26-objectives ul {
    margin: 0;
    padding-left: 20px;
}

.lesson26-objectives li {
    margin: 7px 0;
    color: #475467;
    font-size: 15px;
    line-height: 1.6;
}

.lesson26-section {
    display: grid;
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 14px;
    width: 100%;
    margin: 38px 0;
}

.lesson26-number {
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #eee8ff;
    color: #5b21b6;
    font-size: 14px;
    font-weight: 800;
}

.lesson26-body {
    min-width: 0;
}

.lesson26-body h2 {
    margin: 0 0 10px;
    font-size: 28px;
    line-height: 1.25;
}

.lesson26-body p {
    margin: 9px 0;
    color: #475467;
    font-size: 16px;
    line-height: 1.75;
}

.lesson26-core {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 14px;
    margin: 20px 0;
    padding: 20px;
    border: 1px solid #d8ccef;
    border-left: 4px solid #7c3aed;
    border-radius: 10px;
    background: #faf8ff;
}

.lesson26-core-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 11px;
    background: #eee8ff;
    color: #7c3aed;
    font-size: 22px;
}

.lesson26-core span,
.lesson26-core strong,
.lesson26-core p {
    display: block;
}

.lesson26-core span {
    color: #5b21b6;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .08em;
}

.lesson26-core strong {
    margin-top: 5px;
    color: #24163e;
    font-size: 20px;
    line-height: 1.35;
}

.lesson26-core p {
    margin-bottom: 0;
}

.lesson26-vector-flow {
    display: grid;
    grid-template-columns: 1.3fr auto 1.1fr auto 1.3fr;
    align-items: center;
    gap: 10px;
    margin: 20px 0;
}

.lesson26-text-card,
.lesson26-model-card,
.lesson26-vector-card {
    min-width: 0;
    min-height: 118px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 17px;
    border: 1px solid #e4e7ec;
    border-radius: 11px;
    background: #fff;
}

.lesson26-text-card span,
.lesson26-model-card span,
.lesson26-vector-card span {
    color: #667085;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .07em;
}

.lesson26-text-card b,
.lesson26-model-card b,
.lesson26-vector-card b {
    margin-top: 8px;
    color: #172033;
    font-size: 16px;
    line-height: 1.45;
}

.lesson26-model-card {
    border-color: #d8c7f7;
    background: #faf8ff;
}

.lesson26-model-card span {
    color: #5b21b6;
}

.lesson26-vector-card {
    border-color: #bfe2dc;
    background: #f5fbf8;
}

.lesson26-vector-card span {
    color: #147a55;
}

.lesson26-vector-card small {
    margin-top: 4px;
    color: #667085;
    font-size: 12px;
}

.lesson26-arrow {
    color: #7c3aed;
    font-size: 23px;
    font-weight: 700;
}

.lesson26-similarity {
    display: grid;
    grid-template-columns: 1fr .65fr 1fr;
    gap: 12px;
    align-items: center;
    margin: 12px 0;
}

.lesson26-similarity > div {
    min-width: 0;
    padding: 16px;
    border: 1px solid #cce8db;
    border-radius: 10px;
    background: #f5fbf8;
}

.lesson26-similarity span {
    color: #147a55;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .06em;
}

.lesson26-similarity p {
    margin: 7px 0 0;
    color: #344054;
    font-size: 15px;
    line-height: 1.5;
}

.lesson26-similarity-line {
    text-align: center;
    border: 0 !important;
    background: transparent !important;
}

.lesson26-similarity-line b,
.lesson26-similarity-line i {
    display: block;
}

.lesson26-similarity-line b {
    color: #147a55;
    font-size: 15px;
}

.lesson26-similarity-line i {
    margin-top: 3px;
    color: #667085;
    font-size: 12px;
    font-style: normal;
}

.lesson26-similarity--low > div {
    border-color: #e4e7ec;
    background: #fff;
}

.lesson26-similarity--low span,
.lesson26-similarity--low .lesson26-similarity-line b {
    color: #667085;
}

.lesson26-callout {
    display: grid;
    grid-template-columns: max-content minmax(0, 1fr);
    gap: 10px;
    align-items: start;
    min-width: 0;
    margin: 17px 0;
    padding: 15px 16px;
    border-left: 3px solid #7c3aed;
    border-radius: 0 9px 9px 0;
    background: #faf8ff;
}

.lesson26-callout strong {
    color: #5b21b6;
    font-size: 15px;
    line-height: 1.6;
}

.lesson26-callout span {
    min-width: 0;
    color: #475467;
    font-size: 15px;
    line-height: 1.6;
    overflow-wrap: anywhere;
}

.lesson26-callout--green {
    border-left-color: #147a55;
    background: #f5fbf8;
}

.lesson26-callout--green strong {
    color: #147a55;
}

.lesson26-vector-large {
    margin: 20px auto;
    padding: 23px;
    text-align: center;
    border: 1px solid #d8ccef;
    border-radius: 11px;
    background: #faf8ff;
}

.lesson26-vector-large span,
.lesson26-vector-large strong,
.lesson26-vector-large small {
    display: block;
}

.lesson26-vector-large span {
    color: #667085;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .07em;
}

.lesson26-vector-large strong {
    margin: 12px 0 6px;
    color: #24163e;
    font: 700 25px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
}

.lesson26-vector-large small {
    color: #667085;
    font-size: 12px;
}

.lesson26-map {
    margin: 20px 0;
    padding: 16px;
    border: 1px solid #e4e7ec;
    border-radius: 12px;
    background: #fff;
}

.lesson26-map-title {
    color: #344054;
    font-size: 14px;
    font-weight: 800;
}

.lesson26-map-area {
    position: relative;
    height: 300px;
    margin-top: 12px;
    overflow: hidden;
    border-radius: 9px;
    background:
        linear-gradient(#edf0f5 1px, transparent 1px),
        linear-gradient(90deg, #edf0f5 1px, transparent 1px);
    background-size: 38px 38px;
}

.lesson26-point {
    position: absolute;
    padding: 8px 11px;
    border: 1px solid #d8c7f7;
    border-radius: 99px;
    background: #faf8ff;
    color: #5b21b6;
    font-size: 13px;
    font-weight: 700;
}

.lesson26-point.p1 { left: 17%; top: 26%; }
.lesson26-point.p2 { left: 28%; top: 39%; }
.lesson26-point.p3 { left: 22%; top: 56%; }
.lesson26-point.p4 { left: 58%; top: 31%; }
.lesson26-point.p5 { left: 69%; top: 45%; }
.lesson26-point.p6 { left: 79%; top: 72%; }
.lesson26-point.p7 { left: 67%; top: 82%; }

.lesson26-map > small {
    display: block;
    margin-top: 9px;
    color: #667085;
    font-size: 12px;
}

.lesson26-formula {
    margin: 20px 0;
    padding: 22px;
    text-align: center;
    border: 1px solid #d8ccef;
    border-radius: 11px;
    background: #faf8ff;
}

.lesson26-formula span,
.lesson26-formula strong,
.lesson26-formula small {
    display: block;
}

.lesson26-formula span {
    color: #667085;
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .07em;
}

.lesson26-formula strong {
    margin: 11px 0 8px;
    color: #24163e;
    font: 700 24px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
}

.lesson26-formula small {
    color: #667085;
    font-size: 13px;
}

.lesson26-comparison-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.lesson26-comparison-cards > div {
    padding: 16px;
    border: 1px solid #e4e7ec;
    border-radius: 10px;
    background: #fff;
}

.lesson26-comparison-cards b,
.lesson26-comparison-cards strong,
.lesson26-comparison-cards span {
    display: block;
}

.lesson26-comparison-cards b {
    color: #667085;
    font-size: 13px;
}

.lesson26-comparison-cards strong {
    margin-top: 7px;
    color: #5b21b6;
    font-size: 24px;
}

.lesson26-comparison-cards span {
    margin-top: 3px;
    color: #98a2b3;
    font-size: 12px;
}

.lesson26-note {
    color: #667085 !important;
    font-size: 14px !important;
}

.lesson26-code {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    margin: 18px 0;
    overflow: hidden;
    border: 1px solid #dfe3e8;
    border-radius: 10px;
    background: #f8fafc;
}

.lesson26-codebar {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 12px;
    border-bottom: 1px solid #dfe3e8;
    background: #f1f3f5;
    color: #344054;
    font-size: 14px;
    font-weight: 700;
}

.lesson26-code pre {
    max-width: 100%;
    margin: 0;
    padding: 17px;
    overflow-x: auto;
    background: #f8fafc;
    color: #344054;
    font: 14px/1.7 ui-monospace, SFMono-Regular, Menlo, monospace;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.lesson26-search-demo {
    margin: 20px 0;
    padding: 19px;
    border: 1px solid #e4e7ec;
    border-radius: 11px;
    background: #fff;
}

.lesson26-search-query span,
.lesson26-search-results > span {
    color: #667085;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .07em;
}

.lesson26-search-query strong {
    display: block;
    margin-top: 8px;
    font-size: 18px;
}

.lesson26-search-arrow {
    margin: 13px 0;
    color: #7c3aed;
    text-align: center;
    font-size: 21px;
}

.lesson26-search-results > div {
    display: grid;
    grid-template-columns: 28px minmax(0, 1fr) 48px;
    gap: 10px;
    align-items: center;
    margin-top: 8px;
    padding: 11px;
    border: 1px solid #e4e7ec;
    border-radius: 8px;
}

.lesson26-search-results > div > b {
    color: #5b21b6;
}

.lesson26-search-results p {
    margin: 0;
    font-size: 14px;
    line-height: 1.45;
}

.lesson26-search-results strong {
    color: #147a55;
    font-size: 14px;
    text-align: right;
}

.lesson26-rag-flow {
    display: grid;
    grid-template-columns: repeat(11, auto);
    gap: 7px;
    align-items: center;
    margin: 20px 0;
}

.lesson26-rag-flow > div {
    min-width: 0;
    padding: 13px 10px;
    border: 1px solid #e4e7ec;
    border-radius: 9px;
    background: #fff;
}

.lesson26-rag-flow span,
.lesson26-rag-flow b,
.lesson26-rag-flow small {
    display: block;
}

.lesson26-rag-flow span {
    color: #667085;
    font-size: 10px;
    font-weight: 800;
}

.lesson26-rag-flow b {
    margin-top: 4px;
    font-size: 13px;
}

.lesson26-rag-flow small {
    margin-top: 4px;
    color: #667085;
    font-size: 11px;
}

.lesson26-rag-flow i {
    color: #7c3aed;
    font-size: 17px;
    font-style: normal;
}

.lesson26-rag-focus {
    border-color: #b9dfcf !important;
    background: #f5fbf8 !important;
}

.lesson26-rag-focus span {
    color: #147a55;
}

.lesson26-usecases,
.lesson26-decisions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 18px;
}

.lesson26-usecases > div,
.lesson26-decisions > div {
    padding: 16px;
    border: 1px solid #e4e7ec;
    border-radius: 10px;
    background: #fff;
}

.lesson26-usecases b,
.lesson26-decisions b {
    font-size: 16px;
}

.lesson26-usecases p,
.lesson26-decisions span {
    margin-top: 6px;
    color: #667085;
    font-size: 14px;
    line-height: 1.55;
}

.lesson26-misconceptions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 18px;
}

.lesson26-misconceptions > div {
    padding: 16px;
    border: 1px solid #e4e7ec;
    border-radius: 10px;
    background: #fff;
}

.lesson26-misconceptions span {
    color: #b42318;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .07em;
}

.lesson26-misconceptions b {
    display: block;
    margin-top: 7px;
    font-size: 16px;
    line-height: 1.4;
}

.lesson26-misconceptions p {
    margin-bottom: 0;
    color: #667085;
    font-size: 14px;
}

.lesson26-practice {
    margin: 46px 0 24px;
    padding: 28px;
    border-radius: 12px;
    background: #17112f;
    color: #fff;
}

.lesson26-practice-label {
    color: #c7b4ff;
}

.lesson26-practice h2 {
    margin: 8px 0 10px;
    color: #fff;
    font-size: 31px;
}

.lesson26-practice > p,
.lesson26-practice li {
    color: #d5d0e1;
    font-size: 16px;
    line-height: 1.7;
}

.lesson26-practice ol {
    margin: 18px 0;
    padding-left: 22px;
}

.lesson26-practice-box {
    margin-top: 20px;
    padding: 15px 17px;
    border: 1px solid rgba(255,255,255,.13);
    border-radius: 9px;
    background: rgba(255,255,255,.05);
    color: #ddd8e7;
    font-size: 15px;
    line-height: 1.6;
}

.lesson26-quiz {
    margin: 38px 0;
    padding: 22px 20px;
    border: 1px solid #e4e7ec;
    border-radius: 12px;
    background: #fff;
}

.lesson26-quiz h2 {
    margin: 7px 0 16px;
    font-size: 28px;
}

.lesson26-question {
    padding: 16px 0;
    border-top: 1px solid #e4e7ec;
}

.lesson26-question strong {
    font-size: 16px;
    line-height: 1.5;
}

.lesson26-question p {
    margin: 7px 0 0;
    color: #667085;
    font-size: 15px;
    line-height: 1.6;
}

.lesson26-recap {
    margin: 38px 0;
    padding: 24px 25px;
    border: 1px solid #d9cff0;
    border-radius: 12px;
    background: #faf8ff;
}

.lesson26-recap h2 {
    margin: 7px 0 20px;
    color: #24163e;
    font-size: 27px;
    line-height: 1.25;
}

.lesson26-recap-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 9px;
}

.lesson26-recap-grid div {
    padding: 14px;
    border: 1px solid #e4def0;
    border-radius: 9px;
    background: #fff;
}

.lesson26-recap-grid b,
.lesson26-recap-grid span {
    display: block;
}

.lesson26-recap-grid b {
    color: #5b21b6;
    font-size: 14px;
}

.lesson26-recap-grid span {
    margin-top: 5px;
    color: #667085;
    font-size: 13px;
}

.lesson26-takeaways {
    margin: 38px 0;
    padding: 24px 25px;
    border: 1px solid #cce8db;
    border-radius: 12px;
    background: #f5fbf8;
}

.lesson26-takeaways h2 {
    margin: 0 0 13px;
    color: #147a55;
    font-size: 27px;
}

.lesson26-takeaways ul {
    margin: 0;
    padding-left: 21px;
}

.lesson26-takeaways li {
    margin: 7px 0;
    color: #3e5c51;
    font-size: 15px;
    line-height: 1.6;
}

.lesson26-bottom-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 35px;
    padding-top: 24px;
    border-top: 1px solid #e4e7ec;
}

.lesson26-bottom-nav a {
    min-width: 0;
    padding: 17px;
    border: 1px solid #e4e7ec;
    border-radius: 10px;
    background: #fff;
    color: #5b21b6;
    text-decoration: none;
    font-size: 15px;
    font-weight: 700;
    line-height: 1.5;
    overflow-wrap: anywhere;
}

.lesson26-bottom-nav a:last-child {
    text-align: right;
}

.lesson26-bottom-nav a:hover {
    border-color: #7c3aed;
    background: #faf8ff;
}

@media (max-width: 1050px) {
    .lesson26-rag-flow {
        grid-template-columns: repeat(3, 1fr);
    }

    .lesson26-rag-flow i {
        display: none;
    }

    .lesson26-usecases,
    .lesson26-decisions,
    .lesson26-misconceptions {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 760px) {
    .lesson26-hero h1 {
        font-size: 36px;
    }

    .lesson26-hero p,
    .lesson26-body p {
        font-size: 16px;
    }

    .lesson26-section {
        grid-template-columns: 34px minmax(0, 1fr);
        gap: 11px;
        margin: 32px 0;
    }

    .lesson26-body h2 {
        font-size: 25px;
    }

    .lesson26-callout {
        grid-template-columns: 1fr;
        gap: 3px;
    }

    .lesson26-vector-flow,
    .lesson26-similarity,
    .lesson26-comparison-cards,
    .lesson26-usecases,
    .lesson26-decisions,
    .lesson26-misconceptions,
    .lesson26-bottom-nav {
        grid-template-columns: 1fr;
    }

    .lesson26-vector-flow {
        gap: 7px;
    }

    .lesson26-arrow {
        text-align: center;
        transform: rotate(90deg);
    }

    .lesson26-similarity-line {
        padding: 5px !important;
    }

    .lesson26-map-area {
        height: 260px;
    }

    .lesson26-point {
        font-size: 11px;
        padding: 6px 8px;
    }

    .lesson26-rag-flow {
        grid-template-columns: repeat(2, 1fr);
    }

    .lesson26-recap-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .lesson26-search-results > div {
        grid-template-columns: 25px minmax(0, 1fr);
    }

    .lesson26-search-results strong {
        grid-column: 2;
        text-align: left;
    }

    .lesson26-practice {
        padding: 22px 18px;
    }

    .lesson26-bottom-nav a:last-child {
        text-align: left;
    }
}

@media (max-width: 480px) {
    .lesson26-hero h1 {
        font-size: 32px;
    }

    .lesson26-objectives {
        padding: 16px;
    }

    .lesson26-recap-grid,
    .lesson26-rag-flow {
        grid-template-columns: 1fr;
    }

    .lesson26-vector-large strong,
    .lesson26-formula strong {
        font-size: 19px;
        overflow-wrap: anywhere;
    }

    .lesson26-code pre {
        font-size: 13px;
    }

    .lesson26-map-area {
        height: 230px;
    }
}


/* Shared code-block toolbar fix — Lessons 24–29 */
.lesson26-code.sah-code { overflow: hidden; }
.lesson26-code .sah-codebar { display:flex; align-items:center; justify-content:space-between; gap:12px; min-height:58px; padding:10px 12px; box-sizing:border-box; background:#f1f3f5; border-bottom:1px solid #dfe3e8; color:#344054; }
.lesson26-code .sah-codebar__language { display:flex; align-items:center; gap:7px; font-size:15px; font-weight:800; line-height:1; white-space:nowrap; flex-shrink:0; }
.lesson26-code .sah-codebar__icon { font-size:13px; font-weight:900; letter-spacing:-.05em; }
.lesson26-code .sah-codebar__title { display:none; }
.lesson26-code .sah-codebar__actions { display:flex; align-items:center; gap:8px; margin-left:auto; flex-shrink:0; }
.lesson26-code .sah-codebar__button { appearance:none; border:1px solid #cbd3dc; border-radius:8px; background:#fff; color:#344054; min-height:36px; padding:0 12px; font:700 13px/1 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; cursor:pointer; box-shadow:0 1px 1px rgba(16,24,40,.03); transition:background .15s,border-color .15s,transform .05s; white-space:nowrap; text-decoration:none; }
.lesson26-code .sah-codebar__button:hover { background:#f8fafc; border-color:#98a2b3; }
.lesson26-code .sah-codebar__button:active { transform:translateY(1px); }
.lesson26-code .sah-codebar__button.is-copied { background:#f0fdf4; border-color:#86efac; color:#166534; }
.lesson26-code pre { margin:0; background:#f8fafc; color:#344054; border:0; border-radius:0; overflow:auto; -webkit-overflow-scrolling:touch; white-space:pre; tab-size:4; font:14px/1.65 ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace; }
@media (max-width:600px) { .lesson26-code .sah-codebar { min-height:54px; padding:8px 9px; gap:8px; } .lesson26-code .sah-codebar__language { font-size:14px; } .lesson26-code .sah-codebar__button { min-height:34px; padding:0 9px; font-size:12px; } .lesson26-code .sah-codebar__actions { gap:6px; } .lesson26-code pre { padding:14px; font-size:13px; line-height:1.6; } }
@media (max-width:400px) { .lesson26-code .sah-codebar__button { padding:0 8px; font-size:11px; } }