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@media(max-width:760px){html{scroll-padding-top:85px}.wrap{width:calc(100% - 40px)}.header{height:70px}.logo{font-size:27px}.logo i{font-size:18px}.nav nav{gap:16px}.nav nav>a:not(.nav-cta){display:none}.nav-cta{font-size:12px;padding:11px 14px}.hero-inner{grid-template-columns:1fr;gap:0}.hero-copy{text-align:center;padding:48px 0 0}.eyebrow{font-size:13px;margin-bottom:18px}h1{font-size:40px;letter-spacing:-1.7px}.lead{font-size:16px;margin-top:21px}.button{margin-top:25px;font-size:15px;padding:17px 22px}.hero-caption{font-size:11px}.hero-art{width:min(100%,400px);margin:0 auto;height:615px}.phone{width:270px}.hero-art:before{width:320px;height:320px;left:50%;transform:translateX(-50%);top:140px}.hero-art>.push{width:min(100%,350px);left:0;bottom:110px;padding:15px;gap:10px}.hero-art>.push strong{font-size:11px}.hero-art>.push p{font-size:9px}.tag-one{top:38px;right:0;padding:10px 13px}.spark{top:93px;left:0;font-size:30px}.tag-two{bottom:43px;right:0;font-size:10px}.mock-note{bottom:12px;font-size:9px}.problem{padding-block:65px}h2{font-size:28px;letter-spacing:-1px}.section-lead{font-size:15px;margin-top:17px}.thoughts{gap:10px;margin-top:26px}.thoughts span{font-size:12px;padding:13px 18px}.problem h3{font-size:23px;line-height:1.5}.feature-section{padding-block:65px}.feature-grid{grid-template-columns:1fr;gap:32px}.feature-copy{text-align:center}.feature-copy h2{font-size:29px}.saved-demo{width:100%;max-width:440px;margin:auto;padding:23px}.reverse .feature-copy{grid-row:1}.notification-demo{width:100%;max-width:440px;margin:auto;padding-inline:20px}.notification-demo .push{gap:9px;padding:14px}.notification-demo .push strong{font-size:11px}.notification-demo .push p{font-size:9px}.how{padding-block:65px}.steps{grid-template-columns:1fr;gap:14px;margin-top:30px}.steps li{padding:26px}.step-art{margin:5px auto 18px}.steps h3{font-size:19px}.steps p{font-size:14px}.faq{padding-block:65px;grid-template-columns:1fr;gap:20px}.faq h2{font-size:28px}.faq-list summary{font-size:14px}.download{padding-block:60px}.download h2{font-size:31px}.download p{font-size:14px}.footer{align-items:flex-start;flex-direction:column;padding-block:30px}.footer-right{text-align:left;gap:12px}.availability{font-size:13px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Header: ai.zum.com masthead */
.header{height:74px;background:#fff;border-bottom:1px solid #00000012;backdrop-filter:none}
.header .nav{gap:16px}
.header-brand{display:flex;align-items:center;gap:12px;min-width:0}
.zum-home{display:flex;flex-shrink:0}
.zum-home img{display:block;width:65px;height:27px;object-fit:contain}
.service-name{font-size:24px;font-weight:700;line-height:34px;letter-spacing:-.01em;white-space:nowrap;color:#202632}
.download-trigger{flex-shrink:0;border:0;border-radius:8px;background:var(--blue);color:#fff;padding:12px 20px;font:650 14px/20px "Pretendard Variable",sans-serif;cursor:pointer;min-height:44px}
.download-trigger:hover{background:var(--blue-dark)}
button:focus-visible{outline:3px solid color-mix(in srgb,var(--blue) 60%,white);outline-offset:3px}
html.modal-open{overflow:hidden}
.download-dialog{box-sizing:border-box;width:384px;max-width:calc(100vw - 32px);max-height:calc(100dvh - 32px);margin:auto;border:0;border-radius:18px;padding:32px 28px 26px;background:#fff;color:#171d2c;text-align:center;box-shadow:0 24px 90px #0003;overflow-y:auto;overscroll-behavior:contain}
.download-dialog::backdrop{background:rgba(12,21,29,.65)}
.dialog-close{position:absolute;right:12px;top:12px;display:grid;place-items:center;width:32px;height:32px;border:0;padding:4px;border-radius:6px;background:transparent;color:#98a2b4;cursor:pointer}
.dialog-close svg{width:24px;height:24px}.dialog-close:hover{background:#f3f5f8;color:#394354}
.download-dialog h2{font-size:20px;line-height:1.35;letter-spacing:-.6px;font-weight:750;margin:0}
.download-dialog #download-dialog-description{font-size:13px;line-height:1.5;color:#7e899b;margin-top:12px}
.qr-frame{width:226px;max-width:100%;aspect-ratio:1;margin:24px auto 18px;padding:16px;border:1px solid #f0f1f4;border-radius:14px;background:#f8f9fb;display:grid;place-items:center}
.qr-frame img{width:100%;height:auto;aspect-ratio:1;object-fit:contain}
.qr-pending{display:flex;flex-direction:column;align-items:center;gap:12px;color:#7e899b}
.qr-pending svg{width:45px;height:45px;color:#9aadc9;margin-bottom:4px}.qr-pending strong{font-size:14px;font-weight:650}.qr-pending span{font-size:12px}
.dialog-help{font-size:12px;line-height:1.7;color:#929db0;margin-top:14px}
.copy-link{font:inherit;color:inherit;text-decoration:underline;text-underline-offset:2px;border:0;padding:0;background:none;cursor:pointer}
.copy-status{font-size:12px;line-height:1.6;color:var(--blue);overflow-wrap:anywhere;word-break:normal}.copy-status:not(:empty){margin-top:10px}
.mobile-download{display:block;font-size:13px;font-weight:650;border-radius:8px;background:var(--blue);color:white;padding:12px;margin-top:14px}
.download-dialog [hidden]{display:none!important}
@media(max-width:760px){.header{height:64px}.header .wrap{width:calc(100% - 32px)}.header-brand{gap:9px}.zum-home img{width:57px;height:auto}.service-name{font-size:21px;line-height:30px}.download-trigger{padding:10px 13px;font-size:13px}.download-dialog{padding:32px 22px 24px}.download-dialog h2{font-size:19px}.dialog-help{font-size:11px}}
@media(max-width:360px){.header-brand{gap:7px}.zum-home img{width:51px}.service-name{font-size:19px}.download-trigger{padding-inline:11px;font-size:12px}.download-dialog{padding-inline:18px}}

/* Preserve a white scanning margin around the vector QR. */
#download-qr{background:#fff;padding:12px;box-sizing:border-box}

/* Desktop QR rail; reserve space so it never overlaps the page. */
.download-rail{display:none}
@media(min-width:1280px) and (min-height:480px){
  .download-rail{display:block;position:fixed;left:0;top:0;bottom:0;width:272px;background:#f6f7f9;z-index:11}
  .download-rail-card{position:absolute;left:28px;top:50%;transform:translateY(-50%);width:216px;padding:28px 28px 32px;border-radius:24px;background:var(--blue);display:flex;flex-direction:column;align-items:center;gap:24px}
  .download-rail-icon{display:block;width:48px;height:48px;object-fit:contain}
  .download-rail-qr{display:block;background:#fff;border-radius:12px;padding:12px;width:160px;height:160px}
  .download-rail-qr img{display:block;width:100%;height:100%}
  .download-rail-qr:focus-visible{outline:3px solid #fff;outline-offset:5px}
  .download-rail-caption{margin-top:-12px;color:#fff;text-align:center;font-size:14px;font-weight:700;line-height:1.5;letter-spacing:-.3px}
}

/* The page canvas is 728px wide, independent of the desktop QR rail. */
body{background:#f6f7f9}
body>.header,body>main,body>.footer{width:100%;max-width:728px;margin-inline:auto;background-color:#fff}
.wrap{width:calc(100% - 48px);max-width:none}
body>.footer{padding-inline:24px}
.hero-inner{grid-template-columns:1fr;gap:0;min-height:0}
.hero-copy{text-align:center;padding:56px 0 0}
h1{font-size:48px;letter-spacing:-2px}
.hero-art{width:min(100%,440px);height:650px;margin-inline:auto}
.hero-art:before{width:400px;height:400px;left:50%;transform:translateX(-50%);top:130px}
.hero-art>.push{left:0;width:min(100%,380px)}
.feature-grid{grid-template-columns:1fr;gap:36px}
.feature-copy{text-align:center}
.feature-copy h2{font-size:34px}
.saved-demo,.notification-demo{width:100%;max-width:440px;margin-inline:auto}
.reverse .feature-copy{grid-row:1}
.problem,.feature-section,.how{padding-block:72px}
h2{font-size:32px}
.section-lead{font-size:16px}
.steps{gap:12px}
.steps li{padding:28px 14px}
.steps h3{font-size:16px}
.steps p{font-size:13px}
.faq{grid-template-columns:1fr;gap:24px;padding-block:72px}
@media(min-width:1280px) and (min-height:480px){
  .download-rail{left:calc(50% + 364px)}
}
@media(max-width:760px){
  .wrap{width:calc(100% - 40px)}
  .hero-copy{padding-top:48px}
  h1{font-size:40px;letter-spacing:-1.7px}
  h2{font-size:28px}
  .feature-copy h2{font-size:29px}
  .hero-art{width:min(100%,400px);height:615px}
  .hero-art:before{width:320px;height:320px;top:140px}
  .hero-art>.push{width:min(100%,350px)}
  .problem,.feature-section,.how,.faq{padding-block:65px}
  .section-lead{font-size:15px}
  .steps li{padding:26px}
  .steps h3{font-size:19px}
  .steps p{font-size:14px}
  body>.footer{padding-inline:20px}
}

/* Supplied device mockup fades into the hero background. */
.hero-device{width:min(100%,280px);margin:32px auto 0;line-height:0;mask-image:linear-gradient(to bottom,#000 0%,#000 65%,transparent 100%);-webkit-mask-image:linear-gradient(to bottom,#000 0%,#000 65%,transparent 100%)}
.hero-device img{display:block;width:100%;height:auto}
@media(max-width:760px){.hero-device{width:min(100%,260px);margin-top:28px}}

/* Section 1: white background with the device fading into it. */
.hero{background:#fff}

/* Keep the notification above the device, outside its fade mask. */
.hero-device-scene{position:relative;isolation:isolate;width:min(100%,380px);margin:32px auto 0}
.hero-device-scene .hero-device{position:relative;z-index:0;margin:0 auto}
@media(max-width:760px){.hero-device-scene{margin-top:28px}}

/* New notifications arrive at the top and push earlier ones down. */
.hero-push-stack{position:absolute;z-index:2;top:72px;left:50%;width:min(100%,340px);transform:translateX(-50%)}
.hero-push-overlay{position:absolute;top:0;left:0;display:block;width:100%;height:auto;background:#fff;border-radius:16px;box-shadow:0 8px 22px rgba(35,48,75,.16);animation-duration:7s;animation-timing-function:cubic-bezier(.22,1,.36,1);animation-fill-mode:both;animation-iteration-count:infinite}
.hero-push-first{z-index:1;animation-name:push-first}
.hero-push-second{z-index:2;animation-name:push-second}
.hero-push-third{z-index:3;animation-name:push-third}
@keyframes push-first{
  0%,5%{opacity:0;transform:translateY(-26px) scale(.96)}
  13%,22%{opacity:1;transform:translateY(0) scale(1)}
  30%,39%{opacity:1;transform:translateY(64px) scale(1)}
  47%,72%{opacity:1;transform:translateY(128px) scale(1)}
  86%,100%{opacity:0;transform:translateY(128px) scale(1)}
}
@keyframes push-second{
  0%,22%{opacity:0;transform:translateY(-26px) scale(.96)}
  30%,39%{opacity:1;transform:translateY(0) scale(1)}
  47%,72%{opacity:1;transform:translateY(64px) scale(1)}
  86%,100%{opacity:0;transform:translateY(64px) scale(1)}
}
@keyframes push-third{
  0%,39%{opacity:0;transform:translateY(-26px) scale(.96)}
  47%,72%{opacity:1;transform:translateY(0) scale(1)}
  86%,100%{opacity:0;transform:translateY(0) scale(1)}
}
@media(max-width:760px){.hero-push-stack{top:64px}}
@media(prefers-reduced-motion:reduce){
  .hero-push-overlay{animation:none;opacity:1}
  .hero-push-first{transform:translateY(128px)}
  .hero-push-second{transform:translateY(64px)}
  .hero-push-third{transform:none}
}

/* Inline brand mark scales with the headline on desktop and mobile. */
.hero-brand-line{white-space:nowrap}
.hero-zum-logo{display:inline-block;width:1.85em;height:auto;vertical-align:-.02em;margin-right:.08em}
@media(max-width:380px){.hero-copy h1{font-size:34px;letter-spacing:-1.5px}}

/* Section 2: collected price history, with no fixed-period claim. */
.price-history{padding:120px 0 96px;text-align:center}
.price-history h2{font-size:36px;line-height:1.4;letter-spacing:-1.4px}
.price-history h2 span{display:inline-block;color:var(--blue)}
.price-history-device{width:min(100%,280px);margin:36px auto 0;line-height:0}
.price-history-device img{display:block;width:100%;height:auto}
@media(max-width:760px){
  .price-history{padding:88px 0 72px}
  .price-history h2{font-size:28px;letter-spacing:-1px}
  .price-history-device{width:min(100%,260px);margin-top:28px}
}

.price-history-device{mask-image:linear-gradient(to bottom,#000 0%,#000 82%,transparent 100%);-webkit-mask-image:linear-gradient(to bottom,#000 0%,#000 82%,transparent 100%)}

.price-history .price-history-description{font-size:16px;line-height:1.85}
.price-high,.price-low{display:inline;white-space:nowrap;font-weight:700}
.price-high{color:#f5222d}
.price-low{color:var(--blue)}
.price-triangle{display:inline-block;vertical-align:-.125em;width:1em;height:1em;margin-right:2px;background:currentColor;mask:url("assets/price-triangle.svg") center/contain no-repeat;-webkit-mask:url("assets/price-triangle.svg") center/contain no-repeat}
.price-low .price-triangle{transform:rotate(180deg)}


.price-history-description .price-high,.price-history-description .price-low{font-size:inherit}

.price-history-cta{display:flex;align-items:center;justify-content:center;gap:10px;width:min(100%,400px);min-height:56px;margin:56px auto 0;padding:14px 20px;border-radius:12px;font-size:16px;line-height:24px}
.price-history-cta img{display:block;flex:none;width:28px;height:28px;object-fit:contain}

.download-rail-copy{color:#fff;text-align:center;font-size:17px;font-weight:700;line-height:1.5;letter-spacing:-.3px}

.dialog-close{color:#626c7a}

.dialog-zum-logo{display:inline-block;width:1.85em;height:auto;vertical-align:-.02em;margin-right:.08em}

/* Footer: ZUM logo, policy links and copyright, following zum.com. */
body>.zum-footer{display:flex;flex-direction:column;align-items:flex-start;gap:14px;padding:28px 24px calc(40px + env(safe-area-inset-bottom,0px));border-top:1px solid #e5e5e5;background:#fff}
.footer-zum-logo{flex-shrink:0}
.footer-zum-logo img{display:block;width:65px;height:27px}
.footer-links ul{display:flex;flex-wrap:wrap;gap:6px 0;margin:0;padding:0;list-style:none}
.footer-links li{display:flex;align-items:center;font-size:12px;line-height:20px;color:#626c7a}
.footer-links li+li:before{content:"";width:1px;height:10px;margin-inline:10px;background:#d5d8de}
.footer-links a:hover,.footer-copyright:hover{color:var(--ink);text-decoration:underline;text-underline-offset:2px}
.footer-links strong{font-weight:700;color:var(--ink)}
.footer-copyright{font-size:12px;line-height:20px;color:#8b929e}
@media(max-width:600px){body>.zum-footer{padding-inline:20px}}

/* Registration draft: replace the placeholders with actual app screenshots. */
.registration{padding:80px 0 88px;background:#f6f7f9;text-align:center}
.registration h2{font-size:32px;line-height:1.4}
.registration-intro{margin-top:16px;font-size:16px;line-height:1.7;color:var(--muted)}
.registration-steps{display:grid;gap:56px;list-style:none;margin:40px 0 0;padding:0}
.registration-steps>li{min-width:0}
.registration-number{display:grid;place-items:center;width:28px;height:28px;margin:0 auto 16px;border-radius:50%;background:var(--blue);color:#fff;font-size:14px;font-weight:700}
.registration-steps h3{font-size:18px;line-height:1.5;letter-spacing:-.5px}
.registration-steps p{margin-top:10px;font-size:14px;line-height:1.7;color:var(--muted)}
.registration-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;aspect-ratio:3/4;margin-top:16px;background:#fff;border:1px dashed #d5d7dd;border-radius:18px;color:var(--blue)}
.registration-placeholder>span{font-size:36px;line-height:1}
.registration-placeholder img{display:block;width:65px;height:27px}
.registration-placeholder small{font-size:11px;color:var(--muted)}
.registration-common{width:min(100%,280px);margin:22px auto 0}
.registration-platforms{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;width:min(100%,584px);margin:28px auto 0}
.registration-platforms h4{font-size:15px;line-height:1.5;font-weight:600;color:var(--muted)}
@media(max-width:600px){
  .registration{padding:64px 0}
  .registration h2{font-size:28px}
  .registration-intro{font-size:14px}
  .registration-steps{gap:44px;margin-top:32px}
  .registration-common{max-width:240px}
  .registration-platforms{gap:12px}
  .registration-placeholder{border-radius:14px}
}

.registration-screenshot{display:block;width:100%;height:auto;margin-top:16px}
.registration-screenshot.registration-common{width:min(100%,280px);margin:22px auto 0}
@media(max-width:600px){.registration-screenshot.registration-common{max-width:240px}}

/* Larger guide images; keep both platform screenshots readable. */
.registration-share{display:grid;grid-template-columns:minmax(0,320px) minmax(0,1fr);align-items:center;gap:32px;text-align:left}
.registration-share .registration-number{margin-left:0}
.registration-screenshot.registration-common{width:100%;max-width:320px;margin:0 auto}
.registration-platforms{width:100%;max-width:664px}
.registration-platforms .registration-placeholder{aspect-ratio:2568/3374}
@media(max-width:600px){
  .registration-share{grid-template-columns:1fr;gap:24px;text-align:center}
  .registration-share .registration-number{margin-left:auto}
  .registration-screenshot.registration-common{width:min(100%,300px);max-width:300px}
  .registration-platforms{grid-template-columns:1fr;max-width:300px;gap:32px}
}

.registration-tips{margin:18px 0 0;padding-left:18px;text-align:left;color:var(--muted);font-size:14px;line-height:1.7;word-break:keep-all}
.registration-tips li+li{margin-top:8px}

.registration-platforms{grid-template-columns:1fr;max-width:none;margin-top:0;gap:40px}
.registration-platform-row{display:grid;grid-template-columns:minmax(0,320px) minmax(0,1fr);align-items:center;gap:32px;text-align:left}
.registration-platform-row .registration-number{margin-left:0}
.registration-platform-row .registration-screenshot,.registration-platform-row .registration-placeholder{margin-top:0}
.registration-platform-row h4{margin-top:12px;color:var(--blue)}
@media(max-width:600px){
  .registration-platform-row{grid-template-columns:1fr;gap:24px;text-align:center}
  .registration-platform-row .registration-number{margin-left:auto}
  .registration-platform-row>.registration-screenshot,.registration-platform-row>.registration-placeholder{width:min(100%,300px);margin-inline:auto}
  .registration-platform-row .registration-copy{width:min(100%,300px);margin-inline:auto}
}

.registration-step-heading{display:flex;align-items:center;gap:10px}
.registration-step-heading .registration-number{flex:none;margin:0}
.registration-step-heading h3{margin:0}
@media(max-width:600px){
  .registration-step-heading{justify-content:center}
  .registration-step-heading .registration-number{margin:0}
}

.registration-platform-row+.registration-platform-row{border-top:1px solid #dedfe5;padding-top:40px}
.android-share-animation{display:grid;min-width:0}
.android-share-frame{grid-area:1/1;margin:0;animation:android-share-fade 8s ease-in-out infinite}
.android-share-frame:nth-child(2){animation-delay:-4s}
.android-share-frame figcaption{margin-top:12px;text-align:center;font-size:13px;line-height:1.5;color:var(--blue)}
@keyframes android-share-fade{0%,43%,100%{opacity:1}50%,93%{opacity:0}}
@media(max-width:600px){.android-share-animation{width:min(100%,300px);margin-inline:auto}}
@media(prefers-reduced-motion:reduce){
 .android-share-animation{gap:24px}
 .android-share-frame{grid-area:auto;animation:none}
}

/* Readable registration instructions on desktop and mobile. */
.registration h2{font-size:36px}
.registration-steps h3{font-size:24px;line-height:1.5;letter-spacing:-.5px}
.registration-steps p{font-size:18px;line-height:1.8;color:#484f5c;word-break:keep-all}
.registration-platforms h4{font-size:18px}
.registration-tips{font-size:17px;line-height:1.8;color:#484f5c}
.registration-number{width:34px;height:34px;font-size:18px}
@media(max-width:600px){
 .registration h2{font-size:32px}
 .registration-steps h3{font-size:24px}
}

/* Keep the animated highlight anchored to the screenshot's share button. */
.registration-share-visual{position:relative;width:100%;max-width:320px;margin-inline:auto}
.registration-share-highlight{position:absolute;z-index:1;left:93.1%;top:65.1%;width:12%;height:auto;pointer-events:none;transform:translate(-50%,-50%);animation:registration-share-pulse 1.8s ease-in-out infinite}
@keyframes registration-share-pulse{
  0%,100%{transform:translate(-50%,-50%) scale(1)}
  50%{transform:translate(-50%,-50%) scale(1.14)}
}
@media(max-width:600px){.registration-share-visual{max-width:300px}}
@media(prefers-reduced-motion:reduce){.registration-share-highlight{animation:none}}

/* Privacy policy page */
.policy{padding-block:48px 72px}
.policy h1{font-size:30px;line-height:1.4;letter-spacing:-1px;margin-bottom:20px}
.policy h2{font-size:20px;line-height:1.5;letter-spacing:-.4px;margin:40px 0 12px}
.policy p,.policy li{font-size:15px;line-height:1.8;color:#4a515e}
.policy p+p,.policy .policy-table+p{margin-top:12px}
.policy ul{margin:0;padding-left:20px}
.policy-table{overflow-x:auto;margin-top:12px}
.policy table{width:100%;min-width:480px;border-collapse:collapse;font-size:14px;line-height:1.6}
.policy th,.policy td{padding:10px 12px;border:1px solid var(--line);text-align:left;vertical-align:top}
.policy th{background:var(--pale);font-weight:650}
.policy a{color:var(--blue);text-decoration:underline;text-underline-offset:2px}
@media(max-width:760px){.policy{padding-block:32px 56px}.policy h1{font-size:24px}.policy h2{font-size:18px;margin-top:32px}.policy p,.policy li{font-size:14px}}

/* Header: Chrome extension link beside the app download button. Extensions install on desktop only. */
.header-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}
.extension-link{display:inline-flex;align-items:center;min-height:44px;border:1px solid color-mix(in srgb,var(--blue) 35%,white);border-radius:8px;background:#fff;color:var(--blue);padding:11px 18px;font:650 14px/20px "Pretendard Variable",sans-serif;white-space:nowrap}
.extension-link:hover{background:var(--blue-soft)}
@media(max-width:760px){.extension-link{display:none}}
/* PC mode: the extension link becomes the primary blue button and the app download steps back. */
body[data-mode="pc"] .extension-link{border-color:var(--blue);background:var(--blue);color:#fff;box-shadow:0 6px 16px #1b52ed33}
body[data-mode="pc"] .extension-link:hover{background:var(--blue-dark)}
body[data-mode="pc"] .header-actions .download-trigger{box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--blue) 35%,white);background:#fff;color:var(--blue)}
body[data-mode="pc"] .header-actions .download-trigger:hover{background:var(--blue-soft)}

/* Chrome extension section: three steps with the Web Store screenshots. */
.extension{padding:80px 0 88px;text-align:center}
.extension h2{font-size:36px;line-height:1.4}
.extension-lead{margin-top:16px;font-size:18px;line-height:1.8;color:#484f5c}
.extension-steps{display:grid;gap:48px;list-style:none;margin:40px 0 0;padding:0;text-align:left}
.extension-steps img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:16px;box-shadow:0 12px 32px #283d6514}
/* Step 1: real Coupang page with a red box around the extension's floating button (CSS px of the 1280x800 capture). */
.extension-shot{position:relative}
.extension-shot-mark{position:absolute;left:87.18%;top:91.75%;width:12.19%;height:7.25%;border:3px solid #ff2d2d;border-radius:10px;box-shadow:0 0 0 4px #ff2d2d2e}
.extension-shot-mark span{position:absolute;right:-3px;bottom:calc(100% + 8px);padding:5px 10px;border-radius:6px;background:#ff2d2d;color:#fff;font-size:13px;font-weight:700;line-height:18px;white-space:nowrap}
.extension-step-heading{display:flex;align-items:center;gap:10px;margin-top:20px}
.extension-number{flex:none;display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--blue);color:#fff;font-size:18px;font-weight:700}
.extension-steps h3{font-size:24px;line-height:1.5;letter-spacing:-.5px}
.extension-steps p{margin-top:10px;font-size:18px;line-height:1.8;color:#484f5c}
.extension-cta{display:inline-flex;align-items:center;justify-content:center;min-height:52px;margin-top:48px;padding:14px 32px;border-radius:12px;background:var(--blue);color:#fff;font-size:17px;font-weight:700;box-shadow:0 7px 18px #1b52ed24}
.extension-cta:hover{background:var(--blue-dark)}
.extension-mobile-note{display:none}
@media(max-width:760px){
  .extension{padding:64px 0}
  .extension-shot-mark{border-width:2px;border-radius:6px;box-shadow:none}
  .extension-shot-mark span{right:-2px;bottom:calc(100% + 5px);padding:3px 7px;font-size:11px;line-height:15px}
  .extension h2{font-size:30px}
  .extension-lead,.extension-steps p{font-size:16px}
  .extension-steps{gap:40px;margin-top:32px}
  .extension-steps img{border-radius:12px}
  .extension-steps h3{font-size:21px}
  .extension-cta{display:none}
  .extension-mobile-note{display:block;margin-top:40px;padding:16px;border-radius:12px;background:var(--pale);font-size:15px;line-height:1.6;color:#484f5c}
}

/* App / PC Chrome switch. Without JS (no data-mode) both stay visible and the switch is hidden. */
.mode-switch{display:none}
body[data-mode] .mode-switch{position:relative;display:inline-grid;grid-template-columns:1fr 1fr;margin:0 auto 28px;padding:4px;border-radius:999px;background:var(--pale);box-shadow:inset 0 0 0 1px var(--line)}
.mode-switch:before{content:"";position:absolute;top:4px;bottom:4px;left:4px;width:calc(50% - 4px);border-radius:999px;background:#fff;box-shadow:0 2px 8px #23304b1f;transition:transform .35s cubic-bezier(.22,1,.36,1)}
body[data-mode="app"] .mode-switch:before{transform:translateX(100%)}
.mode-tab{position:relative;z-index:1;min-width:112px;min-height:44px;padding:10px 20px;border:0;border-radius:999px;background:none;color:var(--muted);font:650 15px/20px "Pretendard Variable",sans-serif;cursor:pointer;transition:color .35s}
.mode-tab[aria-selected="true"]{color:var(--blue)}
body[data-mode="app"] .only-pc,body[data-mode="pc"] .only-app{display:none}
body[data-mode] .only-app,body[data-mode] .only-pc{animation:mode-in .45s cubic-bezier(.22,1,.36,1) both}
@keyframes mode-in{from{opacity:0;transform:translateY(12px)}}
.hero-pc{width:min(100%,600px);margin:36px auto 48px}
.hero-pc img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:16px;box-shadow:0 16px 40px #283d651a}
@media(max-width:760px){.mode-switch{margin-bottom:22px}.mode-tab{min-width:96px;font-size:14px}.hero-pc{margin:28px auto 36px}.hero-pc img{border-radius:12px}}
@media(prefers-reduced-motion:reduce){.mode-switch:before,.mode-tab{transition:none}body[data-mode] .only-app,body[data-mode] .only-pc{animation:none}}