.ai-hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(420px, .88fr); align-items: center; gap: 72px; min-height: min(760px, calc(100svh - 104px)); padding-block: 88px; }
.ai-hero-copy { max-width: 760px; }
.ai-hero h1 { margin: 0; font-size: clamp(3.7rem, 6.5vw, 6rem); font-weight: 600; line-height: .98; letter-spacing: -.067em; }
.ai-hero h1 span { color: var(--hero-accent-ink); }
.ai-standfirst { max-width: 700px; margin-top: 30px; color: var(--text-secondary); font-size: clamp(1.125rem, 1.8vw, 1.35rem); line-height: 1.7; letter-spacing: -.018em; }

.ai-choice { justify-self: end; width: min(100%, 460px); padding: 28px; border: 1px solid var(--border); border-radius: 32px; background: var(--bg-secondary); box-shadow: 0 28px 64px -44px rgba(26, 34, 51, .48); }
.ai-choice-card { display: grid; grid-template-columns: 48px minmax(0, 1fr); align-items: center; gap: 16px; padding: 18px; border: 1px solid var(--border-light); border-radius: 18px; background: var(--bg-primary); }
.ai-choice-card strong, .ai-choice-card span { display: block; }
.ai-choice-card strong { font-size: 1.0625rem; font-weight: 650; letter-spacing: -.02em; }
.ai-choice-card div > span { margin-top: 3px; color: var(--text-secondary); font-size: .875rem; line-height: 1.45; }
.ai-choice-icon, .ai-choice-mark { display: grid; place-items: center; width: 48px; aspect-ratio: 1; border-radius: 14px; color: var(--hero-accent-ink); background: var(--hero-accent-soft); }
.ai-choice-icon svg { width: 25px; height: 25px; }
.ai-choice-mark { background: var(--hero-accent); -webkit-mask: url('../images/LSlogo.svg') center / 31px auto no-repeat; mask: url('../images/LSlogo.svg') center / 31px auto no-repeat; }
.ai-choice-or { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 10px; padding: 11px 18px; color: var(--text-tertiary); }
.ai-choice-or span { height: 1px; background: var(--border); }
.ai-choice-or em { font-size: .75rem; font-style: normal; text-transform: uppercase; letter-spacing: .1em; }
.ai-choice-arrow { display: grid; place-items: center; height: 34px; color: var(--hero-accent-ink); font-size: 1.25rem; }
.ai-choice-result { border-color: color-mix(in srgb, var(--hero-accent) 42%, var(--border)); }

.ai-principles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-block: 1px solid var(--border); }
.ai-principle { padding: 48px 40px 52px; }
.ai-principle + .ai-principle { border-left: 1px solid var(--border); }
.ai-principle-number { color: var(--hero-accent-ink); font-size: .75rem; font-weight: 700; letter-spacing: .1em; }
.ai-principle h2 { margin: 18px 0 12px; font-size: 1.35rem; font-weight: 600; letter-spacing: -.035em; }
.ai-principle p { color: var(--text-secondary); line-height: 1.75; }

.ai-making { display: grid; grid-template-columns: minmax(0, .9fr) minmax(440px, 1.1fr); align-items: center; gap: 84px; padding-block: 112px; }
.ai-making-copy { max-width: 620px; }
.ai-making-copy .eyebrow, .models-heading .eyebrow, .data-heading .eyebrow, .ethics-copy .eyebrow { margin-bottom: 18px; }
.ai-making h2, .models-heading h2, .data-heading h2, .ethics-copy h2, .reuse-copy h2 { margin: 0; font-size: clamp(2.4rem, 4vw, 3.5rem); font-weight: 600; line-height: 1.1; letter-spacing: -.055em; }
.ai-making-copy > p:not(.eyebrow), .models-heading > p:last-child, .data-heading > p:last-child, .ethics-copy > p:last-child, .reuse-copy > p:last-child { margin-top: 22px; color: var(--text-secondary); font-size: 1.0625rem; line-height: 1.8; }
.making-flow { padding: 28px; border: 1px solid var(--border); border-radius: 28px; background: var(--bg-secondary); box-shadow: 0 26px 58px -42px rgba(26, 34, 51, .48); }
.making-step { padding: 22px; border: 1px solid var(--border-light); border-radius: 18px; background: var(--bg-primary); }
.making-step > span { color: var(--hero-accent-ink); font-size: .7rem; font-weight: 750; letter-spacing: .11em; }
.making-step p { margin: 12px 0 0; font-size: 1.05rem; font-weight: 560; line-height: 1.55; letter-spacing: -.015em; }
.making-arrow { display: grid; place-items: center; height: 42px; color: var(--hero-accent-ink); font-size: 1.25rem; }
.live-sketch { overflow: hidden; margin: 0; border: 1px solid var(--border-light); border-radius: 18px; background: #fff; }
.live-sketch figcaption { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; padding: 15px 18px; border-bottom: 1px solid var(--border-light); background: var(--bg-primary); }
.live-sketch figcaption span { color: var(--hero-accent-ink); font-size: .7rem; font-weight: 750; letter-spacing: .11em; }
.live-sketch figcaption small { color: var(--text-secondary); font-size: .75rem; line-height: 1.4; text-align: right; }
.live-sketch iframe { display: block; width: 100%; height: 260px; border: 0; background: #fff; }
.lesson-delivery { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr); align-items: center; gap: 10px; margin-top: 14px; padding: 14px; border: 1px solid var(--border-light); border-radius: 16px; background: var(--bg-primary); }
.lesson-delivery > div { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: baseline; column-gap: 8px; }
.lesson-delivery > div > span { color: var(--hero-accent-ink); font-size: .65rem; font-weight: 750; letter-spacing: .08em; }
.lesson-delivery strong { font-size: .85rem; font-weight: 650; }
.lesson-delivery small { grid-column: 1 / -1; margin-top: 4px; color: var(--text-secondary); font-size: .7rem; line-height: 1.35; }
.lesson-delivery-arrow { color: var(--hero-accent-ink); font-size: .9rem; }

.reuse-section { padding-block: 0 112px; }
.reuse-panel { display: grid; grid-template-columns: minmax(0, 1fr) minmax(340px, .7fr); align-items: center; gap: 64px; padding: clamp(40px, 6vw, 72px); border-radius: 32px; color: #f8faff; background: #17213b; box-shadow: 0 24px 56px -32px #17213b99; }
.reuse-copy { max-width: 700px; }
.reuse-copy .eyebrow { margin-bottom: 18px; color: #b7c2dd; }
.reuse-copy h2 { color: #f8faff; }
.reuse-copy > p:last-child { color: #cad2e5; }
.reuse-library { padding: 22px; border: 1px solid #ffffff24; border-radius: 22px; background: #ffffff0c; }
.reuse-item { padding: 18px; border: 1px solid #ffffff28; border-radius: 14px; background: #ffffff0d; }
.reuse-item span { display: block; color: #aebeff; font-size: .68rem; font-weight: 750; letter-spacing: .11em; }
.reuse-item strong { display: block; margin-top: 8px; font-size: 1rem; }
.reuse-lines { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; height: 40px; padding-inline: 30px; }
.reuse-lines i { border-left: 1px solid #8da6ff; }
.reuse-lessons { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.reuse-lessons span { padding: 10px 6px; border-radius: 10px; color: #dce3f7; background: #ffffff0c; font-size: .72rem; text-align: center; }

.models-section { padding-block: 112px; border-block: 1px solid var(--border); }
.models-heading, .data-heading { max-width: 760px; }
.model-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 52px; }
.model-card { padding: 32px; border: 1px solid var(--border); border-radius: 22px; background: var(--bg-secondary); }
.model-card-open { border-color: color-mix(in srgb, var(--hero-accent) 42%, var(--border)); }
.model-icon { display: grid; place-items: center; width: 48px; aspect-ratio: 1; border-radius: 14px; color: var(--hero-accent-ink); background: var(--hero-accent-soft); }
.model-icon svg { width: 25px; height: 25px; }
.model-kicker { margin-top: 24px; color: var(--hero-accent-ink); font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.model-card h3 { margin: 10px 0 0; font-size: 1.35rem; font-weight: 650; letter-spacing: -.035em; }
.model-card > p:last-child { margin-top: 16px; color: var(--text-secondary); line-height: 1.75; }
.model-note { max-width: 880px; margin: 26px 0 0; padding-left: 18px; border-left: 3px solid var(--hero-accent); color: var(--text-secondary); line-height: 1.7; }
.model-note strong { color: var(--text-primary); }

.data-section { padding-block: 112px; }
.data-paths { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 52px; }
.data-path { padding: 30px; border: 1px solid var(--border); border-radius: 22px; }
.data-path h3 { margin: 0 0 26px; font-size: 1.25rem; font-weight: 650; letter-spacing: -.03em; }
.data-path ol { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
.data-path li { position: relative; display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 12px; min-height: 56px; }
.data-step-number { z-index: 1; display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; color: var(--hero-accent-ink); background: var(--hero-accent-soft); font-size: .75rem; font-weight: 700; }
.data-path li:not(:last-child)::after { content: ''; position: absolute; left: 14px; top: 29px; bottom: 0; width: 1px; background: var(--border); }
.data-path li > span:last-child { padding-top: 5px; color: var(--text-secondary); line-height: 1.45; }
.data-detail { max-width: 940px; margin: 30px 0 0; color: var(--text-secondary); font-size: .95rem; line-height: 1.75; }
.data-detail a { color: var(--hero-accent-ink); font-weight: 650; text-decoration: underline; text-underline-offset: 3px; }

.ethics-section { display: grid; grid-template-columns: minmax(0, .7fr) minmax(480px, 1fr); gap: 84px; padding-block: 96px; border-top: 1px solid var(--border); }
.ethics-copy { max-width: 520px; }
.ethics-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.ethics-list article { display: grid; grid-template-columns: 34px minmax(0, 1fr); align-content: start; gap: 13px; padding: 24px; border: 1px solid var(--border); border-radius: 18px; background: var(--bg-secondary); }
.ethics-list article > span { display: grid; place-items: center; width: 30px; aspect-ratio: 1; border-radius: 50%; color: var(--hero-accent-ink); background: var(--hero-accent-soft); font-weight: 750; }
.ethics-list h3 { margin: 4px 0 8px; font-size: 1rem; font-weight: 650; letter-spacing: -.02em; }
.ethics-list p { color: var(--text-secondary); font-size: .9rem; line-height: 1.65; }

.ai-final-section { padding-block: 0 48px; }
.ai-final-panel { position: relative; isolation: isolate; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 48px; overflow: hidden; padding: clamp(44px, 6vw, 72px); border-radius: 32px; color: #f8faff; background: #17213b; box-shadow: 0 24px 56px -32px #17213b99; }
.ai-final-copy { position: relative; z-index: 1; max-width: 740px; }
.ai-final-copy .eyebrow { margin-bottom: 18px; color: #b7c2dd; }
.ai-final-copy h2 { margin: 0; font-size: clamp(2.25rem, 4vw, 3.5rem); font-weight: 550; line-height: 1.12; letter-spacing: -.052em; }
.ai-final-copy h2 span { color: #9bb0ff; }
.ai-final-copy > p:last-child { max-width: 650px; margin-top: 22px; color: #cad2e5; font-size: 1.0625rem; line-height: 1.75; }
.ai-final-button { position: relative; z-index: 1; min-width: 176px; border-color: #91a9ff; background: #91a9ff; }
.ai-final-button:hover { border-color: #a9baff; background: #a9baff; }
.ai-final-mark { position: absolute; right: -40px; bottom: -116px; z-index: 0; width: 280px; aspect-ratio: 160.44432 / 181.39127; background: #b8c5ff; opacity: .07; -webkit-mask: url('../images/LSlogo.svg') center / contain no-repeat; mask: url('../images/LSlogo.svg') center / contain no-repeat; transform: rotate(8deg); }

@media (max-width: 1000px) {
  .ai-hero { grid-template-columns: minmax(0, 1fr); gap: 48px; min-height: auto; padding-block: 80px; }
  .ai-choice { justify-self: stretch; width: auto; }
  .ai-making, .ethics-section { grid-template-columns: minmax(0, 1fr); gap: 52px; }
  .ai-making-copy, .ethics-copy { max-width: 760px; }
}

@media (max-width: 760px) {
  .ai-principles, .model-grid, .data-paths { grid-template-columns: minmax(0, 1fr); }
  .ai-principle { padding: 34px 8px 38px; }
  .ai-principle + .ai-principle { border-top: 1px solid var(--border); border-left: 0; }
  .ethics-list { grid-template-columns: minmax(0, 1fr); }
  .reuse-panel { grid-template-columns: minmax(0, 1fr); gap: 42px; }
}

@media (max-width: 700px) {
  .ai-hero { gap: 40px; padding-block: 56px 64px; }
  .ai-hero h1 { font-size: clamp(2.75rem, 12vw, 4rem); }
  .ai-standfirst { margin-top: 24px; font-size: 1.0625rem; }
  .ai-choice, .making-flow { padding: 18px; border-radius: 24px; }
  .ai-choice-card { padding: 16px; }
  .ai-making, .models-section, .data-section, .ethics-section { padding-block: 72px; }
  .ai-making h2, .models-heading h2, .data-heading h2, .ethics-copy h2, .reuse-copy h2 { font-size: clamp(2rem, 9vw, 2.625rem); }
  .live-sketch figcaption { align-items: flex-start; flex-direction: column; gap: 5px; }
  .live-sketch figcaption small { text-align: left; }
  .live-sketch iframe { height: 240px; }
  .lesson-delivery { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .lesson-delivery > div { padding: 10px; border-radius: 10px; background: var(--bg-secondary); }
  .lesson-delivery-arrow { justify-self: center; transform: rotate(90deg); }
  .reuse-section { padding-bottom: 72px; }
  .reuse-panel { padding: 38px 24px 40px; border-radius: 24px; }
  .model-grid, .data-paths { margin-top: 36px; }
  .model-card, .data-path { padding: 24px; border-radius: 18px; }
  .ai-final-section { padding-block: 0 28px; }
  .ai-final-panel { grid-template-columns: minmax(0, 1fr); gap: 28px; padding: 38px 24px 40px; border-radius: 24px; }
  .ai-final-copy h2 { font-size: clamp(2rem, 9vw, 2.625rem); }
  .ai-final-copy > p:last-child { margin-top: 18px; font-size: 1rem; }
  .ai-final-button { width: 100%; box-sizing: border-box; }
  .ai-final-mark { right: -78px; bottom: -82px; width: 220px; }
}

@media (max-width: 430px) {
  .ai-choice-card { grid-template-columns: 42px minmax(0, 1fr); column-gap: 13px; }
  .ai-choice-icon, .ai-choice-mark { width: 42px; }
  .ai-choice-mark { -webkit-mask-size: 27px auto; mask-size: 27px auto; }
  .reuse-lines { padding-inline: 22px; }
  .reuse-lessons span { font-size: .65rem; }
}

@media (prefers-reduced-motion: reduce) {
  .live-sketch iframe { scroll-behavior: auto; }
}

@media (forced-colors: active) {
  .ai-choice-mark, .ai-final-mark { background: CanvasText; }
  .live-sketch { border-color: CanvasText; }
}

@media print {
  .site-header, .site-footer, .skip-link, .ai-final-button { display: none; }
  .ai-hero { min-height: auto; padding-block: 24px 48px; }
  .ai-choice, .making-flow, .reuse-panel, .model-card, .data-path, .ethics-list article { box-shadow: none; }
  .ai-making, .models-section, .data-section, .ethics-section { padding-block: 48px; }
  .reuse-section, .ai-final-section { padding-block: 0 48px; }
}