/* Image-led presentation for the selected ChatTalk AI brand design. */
.concept-a .wrap{width:min(1380px,calc(100% - 80px))}
.concept-a .topnav{display:flex;align-items:center;justify-content:space-between;flex-wrap:nowrap;gap:28px;padding:26px 0 25px;border-bottom:1px solid #263847}
.brand-lockup{display:flex;flex-direction:column;align-items:flex-start;gap:4px;flex:0 0 auto;min-width:0}
.concept-a .topnav .brand-lockup .brand{width:310px;min-width:280px;height:60px;border-radius:0;background:transparent}
.concept-a .topnav .brand-lockup .brand img{width:148%;left:-27.8%;max-width:none}
.concept-a .brand-lockup .association-link,.concept-a .footer .association-link{display:inline-flex;justify-content:flex-start;align-items:center;gap:4px;min-width:0;min-height:22px;padding:0;margin:0 0 0 3px;border:0;border-radius:0;background:none;box-shadow:none;color:#8496a5;font-size:11px;font-weight:450;line-height:1.5;letter-spacing:.025em;text-decoration:none}
.concept-a .brand-lockup .association-link:hover,.concept-a .footer .association-link:hover{color:#c9dce9;background:none;border:0;box-shadow:none}
.concept-a .brand-lockup .association-link>span,.concept-a .footer .association-link>span{display:inline;font:inherit;color:inherit;max-width:none}
.concept-a .brand-lockup .association-link img,.concept-a .footer .association-link img{display:none}
.concept-a .topnav .navlinks{flex-wrap:nowrap;gap:23px;align-items:center;font-size:13px;line-height:1.5}
.concept-a .navlinks>.language-switch{flex-direction:row;gap:10px;margin-left:4px;padding-left:22px;border-left:1px solid #354552;font-size:12px;line-height:1.5}
.concept-a .navlinks .language-switch a{padding:6px 0;min-height:34px}
.concept-a .footer .association-link.association-footer{grid-column:1/-1;font-size:11px;margin-top:3px}
.concept-a .a-hero{width:min(1380px,calc(100% - 80px));grid-template-columns:minmax(0,.82fr) minmax(0,1.3fr);gap:45px;align-items:center;padding:66px 0 75px}
.concept-a .a-hero h1{font-size:clamp(43px,4.2vw,60px);line-height:1.1;max-width:15ch;letter-spacing:-.052em}
html[lang="ko"] .concept-a .a-hero h1{font-size:clamp(42px,4.2vw,61px);line-height:1.25;letter-spacing:-.04em;max-width:11ch}
.concept-a .a-hero .lead{font-size:16px;max-width:29em;line-height:1.85}
.concept-a .a-hero .hero-art{margin:0;min-width:0;max-width:none;width:100%}
.concept-a .a-hero .hero-art::before{inset:20% 0;background:#248fc321;filter:blur(85px)}
.visual-hero-preview{margin:0;position:relative;min-width:0}
.visual-preview-link{display:block;position:relative;border:1px solid #37566a;border-radius:17px;overflow:hidden;background:#152431;box-shadow:0 30px 70px #02090f45}
.visual-preview-link img{display:block;width:100%;height:auto;aspect-ratio:3/2;object-fit:contain;transform:none}
.visual-preview-zoom{position:absolute;right:15px;bottom:14px;display:grid;place-items:center;width:32px;height:32px;border:1px solid #83c3e94d;border-radius:8px;background:#122738db;color:#d3efff;font-size:19px;transition:background .2s}
.visual-preview-link:hover .visual-preview-zoom{background:#285877}
.visual-hero-preview figcaption{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:14px;color:#8ea9bb;font-size:11px;line-height:1.6;letter-spacing:.01em}
.visual-hero-preview figcaption>span{display:flex;align-items:center;gap:7px}
.visual-hero-preview figcaption i{display:block;flex:0 0 5px;width:5px;height:5px;border-radius:50%;background:#68afd7}
.visual-hero-preview figcaption>a{flex:0 0 auto;color:#bad8ec;text-underline-offset:4px}
.visual-hero-preview figcaption>a:hover{text-decoration:underline}

.visual-feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;align-items:stretch}
.visual-feature-card{border:1px solid #2c4355;border-radius:20px;overflow:hidden;background:#152330;min-width:0;display:flex;flex-direction:column}
.visual-feature-art{display:flex;align-items:center;justify-content:center;height:203px;position:relative;background:radial-gradient(ellipse at 50% 65%,#274c653b 0%,#1c30422b 50%,#1b2b3b00 76%);border-bottom:1px solid #2a4051}
.visual-feature-illustration{display:block;width:242px;max-width:82%;height:auto;overflow:visible}
.visual-art-human{color:#eee9df}.visual-art-ai{color:#81caff}
.visual-feature-copy{display:flex;flex-direction:column;align-items:flex-start;padding:28px 27px 25px;flex:1;min-width:0}
.visual-feature-label{display:block;font-size:11px;font-weight:650;letter-spacing:.13em;text-transform:uppercase;color:#8ccbf1;margin-bottom:13px}
.visual-feature-copy h3{font-size:23px;line-height:1.32;letter-spacing:-.03em;margin-bottom:13px;max-width:17ch}
.visual-feature-copy p{font-size:14px;line-height:1.8;color:#a6b9c8;margin-bottom:23px}
.visual-feature-status{display:inline-block;margin-top:auto;font-size:10px;font-weight:500;line-height:1.6;color:#8dabc0;border-top:1px solid #304958;padding-top:12px;width:100%;letter-spacing:.005em}

.visual-story.wrap{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:65px;align-items:center;padding-top:78px;padding-bottom:80px;border-top:1px solid #293c4b}
.visual-story-art{min-width:0;position:relative;isolation:isolate}
.visual-story-art::before{content:"";position:absolute;inset:19% 13%;z-index:-1;pointer-events:none;background:#287a9c13;filter:blur(55px);border-radius:50%}
.visual-story-art img{display:block;width:100%;height:auto;aspect-ratio:3/2;object-fit:contain}
.visual-story-copy{min-width:0}
.visual-story-copy .eyebrow{margin-bottom:16px}
.visual-story-copy h2{font-size:clamp(31px,3.3vw,45px);line-height:1.2;letter-spacing:-.04em;margin-bottom:22px}
html[lang="ko"] .visual-story-copy h2{line-height:1.35;letter-spacing:-.035em}
.visual-story-lead{font-size:16px;line-height:1.85;max-width:29em}
.visual-story-roles{display:grid;gap:22px;margin:28px 0 25px}
.visual-story-role{display:flex;align-items:center;gap:17px}
.visual-role-symbol{display:grid;place-items:center;flex:0 0 45px;width:45px;height:51px;color:#ece7de}
.visual-story-role.ai .visual-role-symbol{color:#8ad1ff}
.visual-role-symbol svg{display:block;width:35px;height:41px}
.visual-story-role h3{font-size:16px;font-weight:600;line-height:1.4;margin-bottom:4px;letter-spacing:-.015em}
.visual-story-role p{font-size:13px;line-height:1.6;color:#8fa6b7}
.visual-story-note{font-size:11px;line-height:1.75;color:#8099ab;max-width:41em}

.visual-connections.wrap{padding-top:65px;padding-bottom:65px;border-top:1px solid #293c4b}
.visual-connection-heading{display:grid;grid-template-columns:1.05fr 1fr;gap:60px;align-items:end;margin-bottom:18px}
.visual-connection-heading h2{font-size:clamp(31px,3.4vw,44px);line-height:1.25;letter-spacing:-.04em}
.visual-connection-heading p{font-size:16px;line-height:1.85;color:#a3b8c7;max-width:36em;padding-bottom:4px}
.visual-connection-heading .eyebrow{margin-bottom:14px}
.visual-connection-canvas{border-bottom:1px solid #293c4b;background:radial-gradient(ellipse at 50% 45%,#1e3c4e26 0%,#10171f00 66%);position:relative}
.visual-connection-map{display:block;width:100%;height:auto;overflow:visible;font-family:Inter,Pretendard,sans-serif}
html[lang="ko"] .visual-connection-map{font-family:Pretendard,Inter,sans-serif}
.visual-connection-map.mobile{display:none}
.visual-connection-paths{fill:none;stroke:#47728c;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.visual-connection-label rect{fill:#142632;stroke:#2e4c60;stroke-width:1}
.visual-connection-label text{fill:#a9d5ee;font-size:13px;font-weight:550;letter-spacing:.02em}
.visual-connection-node>circle{fill:#263440;stroke:#51616a;stroke-width:1.1}
.visual-connection-node.human{color:#f1ece1}
.visual-connection-node.ai{color:#83ceff}
.visual-connection-node.ai>circle{fill:#1b3447;stroke:#3d6b88}
.visual-connection-node .node-name{fill:#e4eef5;font-size:21px;font-weight:600;letter-spacing:-.025em}
.visual-connection-node .node-detail{fill:#8faabb;font-size:14px;font-weight:400}
.visual-connection-note{font-size:11px;line-height:1.75;color:#879faf;margin-top:18px;max-width:80em}

/* Lower sections use distinct visual arrangements rather than repeated image crops. */
.visual-lower-art{position:relative;min-width:0}
.visual-lower-art svg{display:block;width:100%;height:auto;overflow:visible}
.visual-download-art{width:330px;max-width:90%;margin:0 0 29px -18px}
.concept-a #download.a-docs{align-items:center}
.concept-a #guides{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(230px,.7fr);column-gap:48px;row-gap:27px;align-items:center}
.visual-guides-art{grid-column:2;grid-row:1;width:340px;max-width:100%;justify-self:end;margin:0}
.concept-a #guides>.section-head{grid-column:1;grid-row:1;display:block;margin:0}
.concept-a #guides>.section-head p{margin-top:20px;max-width:40em}
.concept-a #guides>.guide-grid{grid-column:1/-1}
.concept-a #updates{display:grid;grid-template-columns:minmax(240px,.72fr) minmax(0,1.28fr);column-gap:48px;row-gap:29px;align-items:center}
.visual-updates-art{grid-column:1;grid-row:1;width:355px;max-width:100%;margin:0}
.concept-a #updates>.section-head{grid-column:2;grid-row:1;display:block;margin:0}
.concept-a #updates>.section-head .textlink{display:inline-block;margin-top:20px}
.concept-a #updates>[data-updates]{grid-column:1/-1}
.visual-roadmap-showcase{display:grid;grid-template-columns:minmax(0,1.04fr) minmax(0,1fr);gap:65px;align-items:center;margin:0 0 54px;padding:0 0 40px;border-bottom:1px solid #314b5e}
.visual-everyday-art{margin:0;min-width:0;max-width:600px}
.visual-everyday-art img{display:block;width:100%;height:auto;aspect-ratio:3/2;object-fit:contain}
.visual-everyday-copy{max-width:430px}
.visual-everyday-status{display:block;margin-bottom:15px;font-size:11px;color:#96bdd4;font-weight:550;letter-spacing:.04em}
.visual-everyday-copy h3{font-size:clamp(28px,3.1vw,40px);line-height:1.24;letter-spacing:-.035em;margin:0 0 18px}
.visual-everyday-copy p{font-size:16px;line-height:1.85;color:#a2bbcd}
.concept-a .footer{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:20px 28px}
.concept-a .footer .association-link.association-footer{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;gap:25px;width:100%;margin:13px 0 0;padding:28px 0 7px;border-top:1px solid #2d4456;border-radius:0;background:none;color:#d5e1e9;font-size:clamp(32px,3.5vw,44px);font-weight:650;line-height:1.3;letter-spacing:-.045em;box-shadow:none}
.concept-a .footer .association-link.association-footer::after{content:"Korea AI Education Promotion Association";max-width:28em;color:#90a7b8;font-size:12px;font-weight:450;line-height:1.7;letter-spacing:.01em;text-align:right}
html[lang="ko"] .concept-a .footer .association-link.association-footer::after{content:"한국AI교육진흥협회";font-size:14px}

@media(min-width:1440px){.concept-a .a-hero{grid-template-columns:minmax(0,.8fr) minmax(0,1.4fr);gap:65px}.concept-a .a-hero h1{font-size:60px}.concept-a .a-hero .lead{font-size:17px}}
@media(max-width:1120px){
  .concept-a .wrap{width:calc(100% - 48px)}
  .concept-a .topnav .brand-lockup .brand{width:280px;min-width:260px;height:56px}
  .concept-a .topnav{gap:22px}
  .concept-a .topnav .navlinks{gap:17px;font-size:12px}
  .concept-a .navlinks>.language-switch{padding-left:16px;font-size:11px;gap:8px}
  .concept-a .a-hero{width:calc(100% - 48px);gap:32px;grid-template-columns:minmax(0,.85fr) minmax(0,1.2fr)}
  .concept-a .a-hero h1{font-size:clamp(41px,4.6vw,55px)}
  .concept-a .a-hero .lead{font-size:15px}
  .visual-feature-grid{gap:17px}
  .visual-feature-art{height:185px}
  .visual-feature-copy{padding:24px 22px}
  .visual-feature-copy h3{font-size:21px}
  .visual-story.wrap{gap:40px}
}
@media(max-width:920px){
  .concept-a .topnav{align-items:center;gap:20px;flex-wrap:wrap}
  .concept-a .topnav .navlinks{margin-left:auto;gap:19px}
  .concept-a .topnav .navlinks>.button{display:none}
  .concept-a .a-hero{grid-template-columns:1fr;gap:35px;padding-top:48px;padding-bottom:59px}
  .concept-a .a-hero>div:first-child{max-width:700px}
  .concept-a .a-hero h1{font-size:clamp(47px,6.5vw,62px);max-width:18ch}
  html[lang="ko"] .concept-a .a-hero h1{max-width:none;font-size:clamp(43px,6vw,57px)}
  .concept-a .a-hero .lead{font-size:17px;max-width:37em}
  .visual-hero-preview{max-width:850px;margin:0}
  .visual-feature-art{height:170px}
  .visual-feature-copy{padding:23px 20px}
  .visual-feature-copy h3{font-size:20px}
  .visual-feature-copy p{font-size:13px}
  .visual-story.wrap{grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:30px;padding-top:60px;padding-bottom:65px}
  .visual-story-copy h2{font-size:33px}
  .visual-story-lead{font-size:15px}
  .visual-connection-heading{gap:35px}
  .visual-connection-heading p{font-size:15px}
  .visual-connection-node .node-name{font-size:23px}
  .visual-connection-node .node-detail{font-size:16px}
  .visual-download-art{width:290px;margin-left:-12px}
  .concept-a #guides,.concept-a #updates{column-gap:30px}
  .visual-roadmap-showcase{gap:35px}
}
@media(max-width:780px){.concept-a .wrap,.concept-a .a-hero{width:calc(100% - 36px)}}
@media(max-width:680px){
  .concept-a .topnav{gap:20px;padding-top:21px;padding-bottom:21px}
  .concept-a .topnav .brand-lockup .brand{width:290px;min-width:260px;height:58px}
  .concept-a .topnav .navlinks{width:100%;margin:0;gap:19px;justify-content:flex-start;flex-wrap:wrap;font-size:13px}
  .concept-a .navlinks>.language-switch{margin-left:auto;gap:9px;padding-left:0;border-left:0;font-size:12px}
  .concept-a .a-hero{width:calc(100% - 36px);padding-top:36px;padding-bottom:47px;gap:29px}
  .concept-a .a-hero h1{font-size:clamp(42px,8.8vw,55px);max-width:16ch;line-height:1.13;margin:20px 0}
  html[lang="ko"] .concept-a .a-hero h1{font-size:clamp(39px,8.2vw,50px);line-height:1.26}
  .concept-a .a-hero .lead{font-size:16px;line-height:1.85}
  .visual-preview-link{border-radius:12px;box-shadow:0 20px 45px #02090f40}
  .visual-preview-zoom{right:10px;bottom:10px;width:29px;height:29px;font-size:17px}
  .visual-hero-preview figcaption{font-size:10px;margin-top:11px;gap:10px}
  .visual-feature-grid{grid-template-columns:1fr;gap:19px}
  .visual-feature-card{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);border-radius:17px}
  .visual-feature-art{height:auto;min-height:195px;border-bottom:0;border-right:1px solid #2a4051}
  .visual-feature-illustration{max-width:98%;width:225px}
  .visual-feature-copy{padding:24px 21px}
  .visual-feature-copy h3{font-size:21px;margin-bottom:11px;max-width:none}
  .visual-feature-copy p{font-size:13px;margin-bottom:20px}
  .visual-feature-label{font-size:10px;margin-bottom:11px}
  .visual-feature-status{font-size:9px;padding-top:10px}
  .visual-story.wrap{grid-template-columns:1fr;gap:22px;padding-top:45px;padding-bottom:55px}
  .visual-story-art{max-width:520px;width:100%;margin:0 auto}
  .visual-story-copy{max-width:540px}
  .visual-story-copy h2{font-size:34px;margin-bottom:18px}
  .visual-story-lead{font-size:16px;max-width:34em}
  .visual-story-roles{gap:22px;margin:27px 0 23px}
  .visual-story-note{font-size:11px;max-width:43em}
  .visual-connections.wrap{padding-top:43px;padding-bottom:49px}
  .visual-connection-heading{grid-template-columns:1fr;gap:19px;margin-bottom:16px}
  .visual-connection-heading h2{font-size:33px}
  .visual-connection-heading p{font-size:15px;padding-bottom:0}
  .visual-connection-map.desktop{display:none}
  .visual-connection-map.mobile{display:block;max-width:500px;margin:auto}
  .visual-connection-node .node-name{font-size:19px}
  .visual-connection-node .node-detail{font-size:12px}
  .visual-connection-label text{font-size:12px}
  .visual-connection-note{font-size:11px;margin-top:15px}
  .visual-download-art{width:290px;max-width:95%;margin:0 auto 25px}
  .concept-a #guides,.concept-a #updates{grid-template-columns:1fr;row-gap:24px}
  .visual-guides-art,.visual-updates-art{grid-column:1;grid-row:1;width:260px;justify-self:center;margin:0 auto}
  .visual-updates-art{width:280px}
  .concept-a #guides>.section-head,.concept-a #updates>.section-head{grid-column:1;grid-row:2}
  .concept-a #guides>.section-head p{margin-top:17px}
  .concept-a #guides>.guide-grid,.concept-a #updates>[data-updates]{grid-column:1;grid-row:3}
  .visual-roadmap-showcase{grid-template-columns:1fr;gap:15px;margin-bottom:37px;padding-bottom:32px}
  .visual-everyday-art{width:100%;max-width:450px;margin:0 auto}
  .visual-everyday-copy{max-width:480px}
  .visual-everyday-status{font-size:10px;margin-bottom:12px}
  .visual-everyday-copy h3{font-size:32px;margin-bottom:15px}
  .visual-everyday-copy p{font-size:15px}
  .concept-a .footer{grid-template-columns:1fr;gap:16px}
  .concept-a .footer .footer-links{margin-top:0}
  .concept-a .footer .association-link.association-footer{align-items:flex-start;gap:15px;font-size:36px;padding-top:23px;margin-top:6px}
  .concept-a .footer .association-link.association-footer::after{max-width:15em;font-size:10px;padding-top:6px}
  html[lang="ko"] .concept-a .footer .association-link.association-footer::after{font-size:12px;padding-top:10px}
}
@media(max-width:420px){
  .concept-a .topnav .brand-lockup .brand{width:280px;min-width:260px;height:56px}
  .concept-a .topnav .navlinks{gap:16px;font-size:12px}
  .concept-a .navlinks>.language-switch{gap:8px;font-size:11px}
  .visual-feature-card{grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr)}
  .visual-feature-art{min-height:205px}
  .visual-feature-copy{padding:22px 17px}
  .visual-feature-copy h3{font-size:20px}
  .visual-feature-copy p{font-size:12px}
  .visual-preview-zoom{width:25px;height:25px;font-size:16px}
  .visual-connection-node .node-name{font-size:18px}
}
@media(prefers-reduced-motion:reduce){.visual-preview-zoom{transition:none}.visual-preview-link,.visual-feature-card{animation:none;transition:none}}