/* Additive preview chrome only. The app's styles.css is unchanged. */
:root { --showcase-bar-height: 82px; }
.showcase-bar { position: sticky; top: 0; z-index: 30; background: #fff; border-bottom: 1px solid #dce9e4; box-shadow: 0 2px 10px #153c3b08; }
.showcase-banner { max-width: 1600px; min-height: 37px; margin: 0 auto; padding: 8px 22px; display: flex; align-items: center; justify-content: space-between; gap: 12px; color: #466e62; font-size: 11px; line-height: 1.5; }
.showcase-banner strong { font-size: inherit; font-weight: 600; }
.showcase-banner details { flex: 0 0 auto; }
.showcase-banner summary { cursor: pointer; color: #007e6f; }
.showcase-banner details p { position: absolute; right: 18px; top: 33px; width: min(350px, calc(100vw - 36px)); padding: 16px; border: 1px solid #d8e8e1; border-radius: 12px; background: #fff; box-shadow: 0 10px 30px #163c3720; font-size: 12px; z-index: 2; }
.showcase-nav { max-width: 1600px; margin: 0 auto; display: flex; gap: 6px; padding: 0 18px 8px; overflow-x: auto; scrollbar-width: none; }
.showcase-nav::-webkit-scrollbar { display: none; }
.showcase-nav a { flex: 0 0 auto; padding: 7px 13px; border-radius: 8px; color: #70877f; font-size: 11px; white-space: nowrap; line-height: 1.4; }
.showcase-nav a[aria-current='page'] { background: #e8f6f0; color: #008574; font-weight: 700; }
.sidebar { top: var(--showcase-bar-height); height: calc(100dvh - var(--showcase-bar-height)); }
.app-shell { min-height: calc(100dvh - var(--showcase-bar-height)); }
.showcase-note { background: #f3f8f5; border: 1px solid #e0eae4; border-radius: 9px; padding: 11px 13px; color: #647c70; font-size: 11px; line-height: 1.7; margin-bottom: 18px; }
.showcase-nojs { padding: 15px; text-align: center; font-size: 12px; }
input:disabled, select:disabled, textarea:disabled { opacity: 1; -webkit-text-fill-color: #526e60; color: #526e60; cursor: default; }
button:disabled { cursor: default; }
.dialog-open .showcase-banner details[open] p { display: none; }
dialog { position: fixed; inset: 100px 0 auto; margin: 0 auto; max-height: calc(100dvh - 145px); }
dialog .modal-body { max-height: calc(100dvh - 235px); }
#main { scroll-margin-top: 95px; }
@media (max-width: 780px) {
 .showcase-banner { padding: 8px 18px; font-size: 10px; }
 .showcase-nav { padding-left: 12px; padding-right: 12px; gap: 1px; }
 .showcase-nav a { padding: 7px 10px; }
 dialog { inset: 96px 0 auto; max-height: calc(100dvh - 185px); }
 dialog .modal-body { max-height: calc(100dvh - 265px); }
 .showcase-note { font-size: 10px; }
 main { min-height: calc(100dvh - 280px); }
}
@media (max-width: 380px) {
 .showcase-banner { padding-left: 12px; padding-right: 12px; }
 .showcase-nav a { padding-left: 8px; padding-right: 8px; font-size: 10px; }
}
/* Read-only design-specification entry; original app layouts remain unchanged. */
.showcase-plan-intro { margin-top: 18px; }
.showcase-plan-intro h2 { font-size: 16px; margin: 0 0 8px; }
.showcase-plan-intro h2:not(:first-child) { margin-top: 20px; }
.showcase-plan-intro p, .showcase-plan-list p { font-size: 12px; line-height: 1.85; }
.showcase-plan-list { display: grid; gap: 10px; }
.showcase-plan-detail { padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.showcase-plan-detail summary { cursor: pointer; font-size: 13px; font-weight: 600; color: var(--ink); line-height: 1.9; }
.showcase-plan-detail summary .badge { margin-left: 10px; font-weight: 400; }
.showcase-plan-detail .showcase-spec-text { white-space: pre-wrap; margin-top: 14px; font-size: 12px; line-height: 1.85; color: var(--muted); }
.showcase-result-nav { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 18px; }
.upload-control[aria-disabled='true'] { cursor: default; opacity: .6; }
@media (max-width: 480px) {
 .showcase-plan-detail { padding: 13px; }
 .showcase-plan-detail summary .badge { display: table; margin: 7px 0 0; }
}
/* Original fifteen-category artwork; isolated from the historical read-only views. */
.home-intro { padding: 38px 36px; border: 1px solid #cde8df; border-radius: 24px; background: radial-gradient(ellipse at 94% 4%,#c5eee0 0,transparent 52%),#f2faf6; }
.home-intro .eyebrow { color: #228a78; letter-spacing: 2px; }
.home-intro h1 { margin: 14px 0; font-size: clamp(25px,3vw,38px); line-height: 1.3; color: #123f35; }
.home-intro p { color: #56726a; font-size: 14px; line-height: 1.8; }
.home-intro .button-row { margin-top: 24px; }
.home-scope { margin-top: 20px; color: #526f66; font-size: 12px; line-height: 1.8; max-width: 660px; }
.home-scenes,.original-extra { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; }
.original-extra { margin-top: 16px; }
.original-extra[hidden] { display: none; }
.original-scene { min-width: 0; overflow: hidden; background: #fff; border: 1px solid #e0ece7; border-radius: 18px; text-decoration: none; transition: border-color .15s,transform .15s,box-shadow .15s; }
.original-scene:hover { border-color: #71baa4; transform: translateY(-2px); box-shadow: 0 8px 22px #184e3410; }
.original-scene .scene-art { height: 155px; display: flex; align-items: center; justify-content: center; background: radial-gradient(ellipse at center,#e9f6ef 0,#f8fbf9 72%); overflow: hidden; }
.original-scene .scene-art img { width: 154px; height: 154px; max-width: 100%; object-fit: contain; display: block; }
.original-scene .scene-description { padding: 13px 16px 16px; align-items: center; gap: 6px; }
.original-scene h3 { font-size: 14px; line-height: 1.5; }
.original-scene .scene-description p { font-size: 11px; line-height: 1.6; margin-top: 5px; }
.scene-status { display: inline-block; margin-top: 10px; padding: 3px 8px; border-radius: 6px; background: #f0f3f1; color: #66776f; font-size: 10px; }
.scene-status.available { background: #e2f5eb; color: #127156; }
.home-tools { margin-top: 30px; }
.home-tools-note { color: #66796f; font-size: 12px; margin: -6px 0 14px; line-height: 1.7; }
.home-tools .tools-grid { grid-template-columns: repeat(4,minmax(0,1fr)); gap: 12px; }
.home-tools .tool-card { color: #234c3f; text-decoration: none; border-radius: 14px; min-height: 148px; gap: 8px; }
.tool-number { color: #659987; font-size: 12px!important; letter-spacing: 2px; }
.tool-enter { color: #168369; font-size: 10px!important; margin-top: 5px; }
.home-preview-note { display: flex; justify-content: space-between; align-items: center; gap: 18px; border-top: 1px solid #dce9e2; margin-top: 34px; padding-top: 24px; }
.home-preview-note h2 { font-size: 16px; margin: 0 0 9px; }.home-preview-note p { font-size: 12px; color: #697a71; line-height: 1.7; }.home-preview-note a { flex-shrink: 0; color: #16836c; font-size: 12px; }
.original-scene:focus-visible,.home-tools a:focus-visible { outline: 3px solid #09856c; outline-offset: 3px; }
@media (max-width: 700px) {
 .home-intro { padding: 26px 20px; border-radius: 18px; }
 .home-scenes,.original-extra { grid-template-columns: repeat(3,minmax(0,1fr)); gap: 10px; }
 .original-scene .scene-art { height: 112px; }.original-scene .scene-art img { width: 112px; height: 112px; }
 .original-scene .scene-description { padding: 10px; }.original-scene h3 { font-size: 12px; }.original-scene .scene-description>span { display: none; }
 .home-tools .tools-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
 .home-preview-note { display: block; }.home-preview-note a { display: inline-block; margin-top: 12px; }
}
@media (max-width: 480px) {
 .home-scenes,.original-extra { grid-template-columns: repeat(2,minmax(0,1fr)); }
 .original-scene .scene-art { height: 126px; }.original-scene .scene-art img { width: 126px; height: 126px; }
 .home-intro .button-row { align-items: stretch; }.home-intro .btn { font-size: 12px; }
 .home-scenes .scene-description { display: flex; }.home-tools .tool-card { min-height: 138px; }
}
@media (prefers-reduced-motion: reduce) { .original-scene { transition: none; }.original-scene:hover { transform: none; } }

.original-scene .scene-art::after { display: none; }
.home-scenes .original-scene .scene-description { text-align: left; justify-content: space-between; padding: 13px 12px; }
.home-scenes .original-scene .scene-description h3 { white-space: normal; font-size: 14px; }
.home-scenes .original-scene .scene-description p { display: block; }
@media(max-width:480px) { .home-scenes .original-scene .scene-description h3 { font-size: 12px; } }