/* Spring intentionally inherits the original VINYL design without overrides. */
:root[data-theme="summer"]{--paper:#F2E8D5;--paper-deep:#EEE2B5;--vinyl:#E3CDA5;--sage:#C9D49F;--light-sage:#DDE3BB;--wood:#A58E78;--pink:#F0D3CB;--line:#E3CDA5;--season-accent:#AFBC84;--season-soft:#DDE3BB;--season-wash:#EEE2B5}
:root[data-theme="autumn"]{--paper:#F2E8D5;--paper-deep:#E4D7BC;--vinyl:#D5C49A;--sage:#AFBC84;--light-sage:#DDE3BB;--wood:#A58E78;--pink:#D3A29A;--line:#C6A47E;--season-accent:#CD9E75;--season-soft:#F0D4B8;--season-wash:#E8BD91}
:root[data-theme="winter"]{--paper:#F2E8D5;--paper-deep:#D0DEE4;--vinyl:#D2C5B4;--sage:#ADC8BF;--light-sage:#CDDDD5;--wood:#AA9B87;--pink:#E1D4DF;--line:#B6CED8;--season-accent:#99B9C7;--season-soft:#D0DEE4;--season-wash:#BBCBDD}
:root[data-theme]:not([data-theme="spring"]) .site-header{border-color:color-mix(in srgb,var(--line) 35%,transparent)}
:root[data-theme]:not([data-theme="spring"]) .button-primary{background:var(--vinyl);border-color:color-mix(in srgb,var(--wood) 30%,transparent)}
:root[data-theme]:not([data-theme="spring"]) .button-primary:hover{background:var(--season-soft)}
:root[data-theme]:not([data-theme="spring"]) .featured-note{background:color-mix(in srgb,var(--season-soft) 42%,transparent)}
:root[data-theme]:not([data-theme="spring"]) .note-pin{background:color-mix(in srgb,var(--season-accent) 42%,transparent)}
:root[data-theme]:not([data-theme="spring"]) .server-address{background:color-mix(in srgb,var(--paper-deep) 65%,transparent);border-color:color-mix(in srgb,var(--line) 65%,transparent)}
:root[data-theme]:not([data-theme="spring"]) .featured-section,:root[data-theme]:not([data-theme="spring"]) .join-section{border-color:color-mix(in srgb,var(--line) 38%,transparent)}
:root[data-theme]:not([data-theme="spring"]) .hero-visual:before{content:"";position:absolute;inset:15% 5% 12%;background:radial-gradient(ellipse,var(--season-wash),transparent 68%);opacity:.09;pointer-events:none;z-index:-1}
.theme-preview-toolbar{display:none;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;padding:12px 20px;border-bottom:1px solid var(--line);background:var(--paper);font-size:10px;line-height:1.9}
html[data-theme-preview="true"] .theme-preview-toolbar{display:flex}
.theme-preview-toolbar>span{color:var(--muted);margin-right:7px}.theme-preview-toolbar button{border:1px solid transparent;border-radius:4px;padding:7px 11px;background:none;font-size:10px}.theme-preview-toolbar button[aria-pressed="true"]{background:var(--vinyl);border-color:var(--line)}.theme-preview-toolbar>a{font-size:9px;color:var(--muted);text-decoration:underline;text-underline-offset:4px;margin-left:9px}
@media(max-width:620px){.theme-preview-toolbar{gap:5px;padding:10px 15px}.theme-preview-toolbar>span{width:100%;text-align:center}.theme-preview-toolbar button{min-height:44px}.theme-preview-toolbar>a{width:100%;text-align:center;margin:3px 0 0}}