/* Shared light palette. Artwork keeps its original colours. */
:root{color-scheme:light;--bg:#ffffff;--surface:#f5f7fa;--subtle:#edf1f6;--border:#dbe1e9;--text:#19212e;--muted:#505d6d;--dim:#626f80;--blue:#2459b8}
body{background:var(--bg);color:var(--text)}
::selection{background:#dce8ff;color:#142d59}
.header{background:#fffffff0;border-bottom-color:var(--border)}
.hero-grid{background-image:radial-gradient(50% 40% at 50% 20%,#dfeafe80,transparent),linear-gradient(#172d4c06 1px,transparent 1px),linear-gradient(90deg,#172d4c06 1px,transparent 1px)}
.surface{border-color:#e9edf3}
.topic-intro h1 em{color:var(--dim)}
.button-primary{background:#215bd0;color:#fff;box-shadow:0 4px 12px #215bd019}
.button-primary:hover{background:#174bb5;color:#fff;box-shadow:0 7px 20px #215bd027}
.text-link,.back-to-carousel,.more-link{color:var(--blue)}
.text-link:hover,.back-to-carousel:hover{color:#143b83}
.expanded-footer nav a,.breadcrumbs,.breadcrumbs>span:last-child{color:var(--muted)}
.expanded-footer nav a:hover,.expanded-footer nav a[aria-current],.breadcrumbs a:hover{color:var(--blue)}
.hero-showcase,.topic-hero-art{background:#fff;border-color:var(--border);box-shadow:0 16px 48px #203c6010}
.showcase-top{border-bottom-color:var(--border)}
.showcase-top>span:first-child{color:#344154}
.showcase-bottom{background:#f7f9fc}
.hero-film{background:#e9eff6}
.showcase-meta,.showcase-bottom,.story-label,.demo-label,.sample-note,.art-note,.media-credit,.cta-note,.topic-hero-art figcaption,.topic-hero-art figcaption>span:last-child,.prompt-top>span:last-child,.motion-caption>span:last-child,.chat-result>div>span,.compare-hint{color:var(--dim)}
.topic-hero-art .art-zoom>img{background:#f0f3f7}
.topic-facts{color:var(--muted)}
.section-nav{background:#f8fafe;border-color:var(--border)}
.section-nav a{color:var(--muted)}
.section-nav a:hover{color:var(--blue)}
.topic-case,.topic-prompt,.checklist,.conversation{background:#fff;border-color:var(--border)}
.topic-case:hover,.case-card:hover{border-color:#9baecb;box-shadow:0 10px 28px #203c600d}
.topic-steps article,.guide-articles article,.prompt-top,.prompt-bottom,.story-list li,.conversation-top,.step,.checklist label,.faq-list details,.faq-list details:first-child{border-color:var(--border)}
.sample{background:#edf1f6}
.editorial-art,.related-card>div,.story-visual{border-color:var(--border)}
.portrait-art{background:linear-gradient(130deg,#e5edf8,#eff3f7)}
.topic-prompt>#prompt-text,.prompt-example p{color:#354357}
.prompt-bottom>p{color:var(--muted)}
.copy-button{color:#33465f;border-color:#cbd6e5;background:#f4f7fc}
.copy-button:hover{background:#e8eff9;border-color:#a9bddb}
.copy-status,.prompt-status{color:#2c684c}
.gallery-stage{background:linear-gradient(#f1f6fe,#fff)}
.slide-card,.slide-card:hover{box-shadow:0 6px 20px #203c601f}
.format-preview{background-color:#eaf0f7;background-image:radial-gradient(#60789735 1px,transparent 1px)}
.mini-sheet{box-shadow:7px 9px 0 #6b83a22b}
.format-primary{border-color:#b7cae8;background:linear-gradient(#f3f7fe,#fff)}
.prompt-example{border-color:#cbdcf3;background:#f2f7ff}
.story-visual{background:linear-gradient(135deg,#e8f0fa,#f0f5f8)}
.floating-caption{color:#344154;background:#fffffff0;border-color:var(--border);box-shadow:0 6px 20px #203c601a}
.conversation{box-shadow:0 12px 30px #203c600c}
.conversation-top{color:#41556b}
.user-message{background:#eaf1fc;color:#2b4164}
.chat-result{background:#eff3f8}
.editing-list>div>span{background:#f1f5fb;border-color:var(--border);color:#496484}
.editing-list b{color:var(--text)}
.compare-wrap{background:#fff;scrollbar-color:#9babc0 #edf2f8}
thead th,tbody th{background:#f4f7fb}
thead th:last-child{background:#e7effd;color:#284774}
tbody td:last-child{background:#f3f7ff}
tbody th,tbody td{border-color:var(--border)}
.checklist input{background:white;border-color:#78899e}
.checklist input:checked{background:var(--blue);border-color:var(--blue)}
.checklist input:checked::after{color:white}
.checklist label:has(input:checked) span{color:#506579}
.checklist input:focus-visible{outline-color:var(--blue)}
.final-cta{background:radial-gradient(ellipse at 50% 100%,#e5efff,transparent 75%),#fafcff}
.slide-dialog,.art-dialog{background:white;color:var(--text);border-color:#cbd5e1;box-shadow:0 25px 90px #172f5338}
.slide-dialog::backdrop,.art-dialog::backdrop{background:#293c5766;backdrop-filter:blur(10px)}
.dialog-toolbar,.dialog-footer{border-color:var(--border)}
.dialog-toolbar>span{color:#344154}
.dialog-footer{color:var(--muted)}
.dialog-footer a{color:var(--blue)}
.dialog-art{background:#f0f3f7}
.icon-button{background:#edf2f8;color:#344154}
.icon-button:hover{background:#dfe8f4}
.motion-card{background:#edf1f6;border-color:var(--border)}
.motion-caption{background:#fff;color:var(--muted)}
.still-frame{color:#fff}
.film-control{background:#fffffff2;color:#263a53;border-color:#cbd5e1;box-shadow:0 3px 14px #172f531a}
.film-control:hover{background:#fff}
.footer{background:#fff}