/* ==========================================================
   SimpleAIHub — Lesson 25
   Prompt Optimization
   Same visual system as Lesson 22 / Lesson 24
========================================================== */

.lesson25-page,
.lesson25-page * {
    box-sizing: border-box;
}

.lesson25-page {
    min-width: 0;
    overflow-x: clip;
}

.lesson25-content {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    padding: 0 0 60px;
    color: #172033;
}

.lesson25-content a {
    color: #5b21b6;
}

.lesson25-breadcrumb {
    margin-bottom: 18px;
    color: #667085;
    font-size: 14px;
}

.lesson25-breadcrumb a {
    text-decoration: none;
}

.lesson25-breadcrumb span {
    padding: 0 7px;
}

.lesson25-hero {
    padding-bottom: 28px;
    border-bottom: 1px solid #e7eaf0;
}

.lesson25-label,
.lesson25-practice-label,
.lesson25-quiz-label {
    color: #5b21b6;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: .07em;
}

.lesson25-hero h1 {
    margin: 7px 0 12px;
    color: #172033;
    font-size: 46px;
    line-height: 1.08;
}

.lesson25-hero p {
    max-width: 790px;
    margin: 0;
    color: #475467;
    font-size: 18px;
    line-height: 1.7;
}

.lesson25-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 16px;
    color: #667085;
    font-size: 14px;
}

.lesson25-objectives {
    margin: 24px 0;
    padding: 20px;
    border: 1px solid #e4e7ec;
    border-radius: 12px;
    background: #f8fafc;
}

.lesson25-objectives h2 {
    margin: 0 0 10px;
    font-size: 21px;
}

.lesson25-objectives ul {
    margin: 0;
    padding-left: 20px;
}

.lesson25-objectives li {
    margin: 7px 0;
    color: #475467;
    font-size: 15px;
    line-height: 1.6;
}

.lesson25-section {
    display: grid;
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 14px;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    margin: 38px 0;
}

.lesson25-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;
}

.lesson25-body {
    min-width: 0;
    max-width: 100%;
}

.lesson25-body h2 {
    margin: 0 0 10px;
    font-size: 28px;
    line-height: 1.25;
}

.lesson25-body h3 {
    margin: 7px 0 5px;
    font-size: 18px;
}

.lesson25-body p {
    margin: 9px 0;
    color: #475467;
    font-size: 16px;
    line-height: 1.75;
}

.lesson25-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;
}

.lesson25-callout strong {
    color: #5b21b6;
    font-size: 15px;
    line-height: 1.6;
}

.lesson25-callout span {
    min-width: 0;
    color: #475467;
    font-size: 15px;
    line-height: 1.6;
    overflow-wrap: anywhere;
}

.lesson25-callout--green {
    border-left-color: #147a55;
    background: #f5fbf8;
}

.lesson25-callout--green strong {
    color: #147a55;
}

.lesson25-tag {
    display: inline-block;
    color: #5b21b6;
    font-size: 14px;
    font-weight: 800;
}

.lesson25-compare {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 18px 0;
}

.lesson25-compare > div {
    min-width: 0;
    padding: 17px;
    border: 1px solid #e4e7ec;
    border-radius: 10px;
    background: #fff;
}

.lesson25-compare h3 {
    font-size: 19px;
}

.lesson25-compare pre,
.lesson25-practice pre {
    max-width: 100%;
    min-width: 0;
    margin: 13px 0;
    padding: 15px;
    overflow-x: auto;
    border-radius: 8px;
    background: #f8fafc;
    color: #344054;
    font: 14px/1.65 ui-monospace, SFMono-Regular, Menlo, monospace;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.lesson25-compare p {
    font-size: 15px;
}

.lesson25-goals {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin: 18px 0;
}

.lesson25-goals > div,
.lesson25-metrics > div,
.lesson25-layers > div,
.lesson25-tradeoffs > div,
.lesson25-production > div,
.lesson25-example-sets > div {
    min-width: 0;
    padding: 15px;
    border: 1px solid #e4e7ec;
    border-radius: 10px;
    background: #fff;
}

.lesson25-goals b,
.lesson25-goals span,
.lesson25-metrics b,
.lesson25-metrics strong,
.lesson25-metrics span,
.lesson25-layers span,
.lesson25-layers b,
.lesson25-layers small,
.lesson25-tradeoffs b,
.lesson25-tradeoffs span,
.lesson25-production b,
.lesson25-production span,
.lesson25-example-sets span,
.lesson25-example-sets h3,
.lesson25-example-sets p {
    display: block;
}

.lesson25-goals b {
    font-size: 16px;
}

.lesson25-goals span {
    margin-top: 5px;
    color: #667085;
    font-size: 14px;
    line-height: 1.55;
}

.lesson25-code {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    margin: 18px 0;
    overflow: hidden;
    border: 1px solid #dfe3e8;
    border-radius: 10px;
    background: #f8fafc;
}

.lesson25-codebar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 12px;
    border-bottom: 1px solid #dfe3e8;
    background: #f1f3f5;
    color: #344054;
    font-size: 14px;
    font-weight: 700;
}

.lesson25-code pre {
    max-width: 100%;
    min-width: 0;
    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;
}

.lesson25-table {
    margin: 18px 0;
    overflow-x: auto;
    border: 1px solid #e4e7ec;
    border-radius: 10px;
    background: #fff;
}

.lesson25-table-row {
    min-width: 680px;
    display: grid;
    grid-template-columns: 1.5fr .7fr 1.2fr;
    gap: 15px;
    padding: 13px 15px;
    border-bottom: 1px solid #edf0f2;
    color: #475467;
    font-size: 14px;
    line-height: 1.5;
}

.lesson25-table-row:last-child {
    border-bottom: 0;
}

.lesson25-table-head {
    color: #344054;
    background: #f8fafc;
    font-weight: 800;
}

.lesson25-metrics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin: 18px 0;
}

.lesson25-metrics b {
    font-size: 14px;
    color: #667085;
}

.lesson25-metrics strong {
    margin-top: 8px;
    color: #147a55;
    font-size: 22px;
}

.lesson25-metrics span {
    margin-top: 5px;
    color: #667085;
    font-size: 13px;
    line-height: 1.45;
}

.lesson25-score {
    display: grid;
    grid-template-columns: 130px minmax(0, 1fr) 55px;
    gap: 12px;
    align-items: center;
    margin-top: 22px;
    color: #344054;
    font-size: 14px;
    font-weight: 700;
}

.lesson25-score > div {
    height: 10px;
    overflow: hidden;
    border-radius: 99px;
    background: #e5e7eb;
}

.lesson25-score i {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: #7c3aed;
}

.lesson25-experiment {
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr;
    align-items: center;
    gap: 10px;
    margin: 20px 0;
}

.lesson25-experiment > div {
    min-width: 0;
    padding: 17px;
    border: 1px solid #e4e7ec;
    border-radius: 10px;
    background: #fff;
}

.lesson25-experiment span,
.lesson25-experiment b,
.lesson25-experiment small {
    display: block;
}

.lesson25-experiment span {
    color: #5b21b6;
    font-size: 12px;
    font-weight: 800;
}

.lesson25-experiment b {
    margin-top: 6px;
    font-size: 16px;
}

.lesson25-experiment small {
    margin-top: 4px;
    color: #667085;
    font-size: 13px;
    line-height: 1.5;
}

.lesson25-experiment i {
    color: #7c3aed;
    font-style: normal;
    font-size: 20px;
}

.lesson25-experiment-focus {
    border-color: #cbb9ea !important;
    background: #faf8ff !important;
}

.lesson25-layers {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 9px;
    margin: 20px 0;
}

.lesson25-layers span {
    color: #5b21b6;
    font-size: 12px;
    font-weight: 800;
}

.lesson25-layers b {
    margin-top: 8px;
    font-size: 15px;
}

.lesson25-layers small {
    margin-top: 5px;
    color: #667085;
    font-size: 13px;
    line-height: 1.5;
}

.lesson25-example-sets {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin: 20px 0;
}

.lesson25-example-sets span {
    color: #667085;
    font-size: 12px;
    font-weight: 800;
}

.lesson25-example-sets h3 {
    margin: 7px 0 12px;
    font-size: 18px;
}

.lesson25-example-sets p {
    margin: 5px 0;
    color: #667085;
    font-size: 14px;
}

.lesson25-example-best {
    border-color: #b9dfcf !important;
    background: #f5fbf8 !important;
}

.lesson25-regression {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 12px;
    margin: 20px 0;
}

.lesson25-regression > div {
    min-width: 0;
    padding: 18px;
    border: 1px solid #e4e7ec;
    border-radius: 10px;
    background: #fff;
}

.lesson25-regression span,
.lesson25-regression b,
.lesson25-regression small {
    display: block;
}

.lesson25-regression span {
    color: #667085;
    font-size: 12px;
    font-weight: 800;
}

.lesson25-regression b {
    margin-top: 7px;
    font-size: 20px;
}

.lesson25-regression small {
    margin-top: 5px;
    color: #b42318;
    font-size: 14px;
}

.lesson25-regression-arrow {
    color: #7c3aed;
    font-size: 21px;
}

.lesson25-tradeoffs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin: 20px 0;
}

.lesson25-tradeoffs b {
    font-size: 16px;
    color: #5b21b6;
}

.lesson25-tradeoffs span {
    margin-top: 6px;
    color: #667085;
    font-size: 14px;
    line-height: 1.5;
}

.lesson25-balance {
    padding: 20px;
    border: 1px solid #d8cff0;
    border-radius: 10px;
    background: #faf8ff;
}

.lesson25-balance span,
.lesson25-balance strong {
    display: block;
}

.lesson25-balance span {
    color: #667085;
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .07em;
}

.lesson25-balance strong {
    margin-top: 7px;
    color: #5b21b6;
    font-size: 19px;
}

.lesson25-production {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin: 20px 0;
}

.lesson25-production b {
    font-size: 16px;
}

.lesson25-production span {
    margin-top: 6px;
    color: #667085;
    font-size: 14px;
    line-height: 1.55;
}

.lesson25-practice {
    margin: 46px 0 24px;
    padding: 28px;
    border-radius: 12px;
    background: #17112f;
    color: #fff;
}

.lesson25-practice-label {
    color: #c7b4ff;
}

.lesson25-practice h2 {
    margin: 8px 0 10px;
    color: #fff;
    font-size: 31px;
}

.lesson25-practice > p {
    color: #d5d0e1;
    font-size: 16px;
}

.lesson25-practice .lesson25-practice-box {
    color: #ddd8e7;
}

.lesson25-checklist {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 9px;
    margin-top: 20px;
}

.lesson25-checklist span {
    padding: 12px;
    border: 1px solid rgba(255,255,255,.13);
    border-radius: 8px;
    background: rgba(255,255,255,.05);
    color: #d8d2e4;
    font-size: 14px;
}

.lesson25-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);
    font-size: 15px;
    line-height: 1.6;
}

.lesson25-quiz {
    margin: 38px 0;
    padding: 22px 20px;
    border: 1px solid #e4e7ec;
    border-radius: 12px;
    background: #fff;
}

.lesson25-quiz h2 {
    margin: 7px 0 16px;
    font-size: 28px;
}

.lesson25-question {
    padding: 16px 0;
    border-top: 1px solid #e4e7ec;
}

.lesson25-question strong {
    font-size: 16px;
    line-height: 1.5;
}

.lesson25-question p {
    margin: 7px 0 0;
    color: #667085;
    font-size: 15px;
    line-height: 1.6;
}

.lesson25-recap {
    margin: 38px 0;
    padding: 24px 25px;
    border: 1px solid #d9cff0;
    border-radius: 12px;
    background: #faf8ff;
}

.lesson25-recap h2,
.lesson25-takeaways h2 {
    margin: 0 0 13px;
    font-size: 27px;
}

.lesson25-recap ul,
.lesson25-takeaways ul {
    margin: 0;
    padding-left: 21px;
}

.lesson25-recap li,
.lesson25-takeaways li {
    margin: 7px 0;
    color: #475467;
    font-size: 15px;
    line-height: 1.6;
}

.lesson25-takeaways {
    margin: 38px 0;
    padding: 24px 25px;
    border: 1px solid #cce8db;
    border-radius: 12px;
    background: #f5fbf8;
}

.lesson25-takeaways h2 {
    color: #147a55;
}

.lesson25-bottom-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 35px;
    padding-top: 24px;
    border-top: 1px solid #e4e7ec;
}

.lesson25-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;
}

.lesson25-bottom-nav a:last-child {
    text-align: right;
}

.lesson25-bottom-nav a:hover {
    border-color: #7c3aed;
    background: #faf8ff;
}

@media (max-width: 1050px) {
    .lesson25-goals,
    .lesson25-metrics,
    .lesson25-layers,
    .lesson25-tradeoffs {
        grid-template-columns: repeat(2, 1fr);
    }

    .lesson25-experiment {
        grid-template-columns: 1fr 1fr 1fr;
    }

    .lesson25-experiment i {
        display: none;
    }
}

@media (max-width: 760px) {
    .lesson25-hero h1 {
        font-size: 36px;
    }

    .lesson25-hero p,
    .lesson25-body p {
        font-size: 16px;
    }

    .lesson25-compare,
    .lesson25-example-sets,
    .lesson25-regression,
    .lesson25-production,
    .lesson25-bottom-nav {
        grid-template-columns: 1fr;
    }

    .lesson25-section {
        grid-template-columns: 34px minmax(0, 1fr);
        gap: 11px;
        margin: 32px 0;
    }

    .lesson25-body h2 {
        font-size: 25px;
    }

    .lesson25-callout {
        grid-template-columns: 1fr;
        gap: 3px;
    }

    .lesson25-goals,
    .lesson25-metrics,
    .lesson25-layers,
    .lesson25-tradeoffs,
    .lesson25-checklist {
        grid-template-columns: 1fr;
    }

    .lesson25-experiment {
        grid-template-columns: 1fr;
    }

    .lesson25-score {
        grid-template-columns: 1fr;
    }

    .lesson25-score > div {
        width: 100%;
    }

    .lesson25-practice {
        padding: 22px 18px;
    }

    .lesson25-bottom-nav a:last-child {
        text-align: left;
    }

    .lesson25-table {
        max-width: 100%;
    }

    .lesson25-page pre {
        max-width: 100%;
        overflow-x: auto;
        white-space: pre-wrap;
        overflow-wrap: anywhere;
        word-break: break-word;
    }
}

@media (max-width: 480px) {
    .lesson25-page {
        max-width: 100%;
    }

    .lesson25-hero h1 {
        font-size: 32px;
    }

    .lesson25-meta {
        gap: 7px;
        font-size: 13px;
    }

    .lesson25-objectives {
        padding: 16px;
    }

    .lesson25-body h2 {
        font-size: 24px;
    }

    .lesson25-code pre,
    .lesson25-compare pre {
        font-size: 13px;
    }
}


/* Shared code-block toolbar fix — Lessons 24–29 */
.lesson25-code.sah-code { overflow: hidden; }
.lesson25-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; }
.lesson25-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; }
.lesson25-code .sah-codebar__icon { font-size:13px; font-weight:900; letter-spacing:-.05em; }
.lesson25-code .sah-codebar__title { display:none; }
.lesson25-code .sah-codebar__actions { display:flex; align-items:center; gap:8px; margin-left:auto; flex-shrink:0; }
.lesson25-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; }
.lesson25-code .sah-codebar__button:hover { background:#f8fafc; border-color:#98a2b3; }
.lesson25-code .sah-codebar__button:active { transform:translateY(1px); }
.lesson25-code .sah-codebar__button.is-copied { background:#f0fdf4; border-color:#86efac; color:#166534; }
.lesson25-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) { .lesson25-code .sah-codebar { min-height:54px; padding:8px 9px; gap:8px; } .lesson25-code .sah-codebar__language { font-size:14px; } .lesson25-code .sah-codebar__button { min-height:34px; padding:0 9px; font-size:12px; } .lesson25-code .sah-codebar__actions { gap:6px; } .lesson25-code pre { padding:14px; font-size:13px; line-height:1.6; } }
@media (max-width:400px) { .lesson25-code .sah-codebar__button { padding:0 8px; font-size:11px; } }