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:root[data-theme=light]{color-scheme:light;--bg:#faf9f7;--surface:#fff;--surface2:#f4f0eb;--text:#1c2028;--muted:#646a73;--line:#e8e1d9;--accent:#b84b00;--accentText:#fff;--accentSoft:#e57b27;--accentGradientEnd:#d5650d;--brand:#b84b00;--blue:#b46a32;--pink:#c87537;--cardShadow:0 12px 35px rgba(38,22,10,.07)}
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@media(max-width:790px){.container{width:min(100% - 34px,660px)}.header-inner{min-height:64px}.nav{display:none}.header-clock{display:none}.hero{grid-template-columns:1fr;padding-block:65px 42px}.hero-panel{max-width:440px}.hero h1{font-size:clamp(37px,8vw,55px)}.hero-copy>p{font-size:15px}.quick-item{padding:17px 10px;gap:9px}.quick-item strong{font-size:12px}.quick-item small{font-size:10px}.quick-arrow,.soon-tag{display:none}.feed-section{padding-top:75px}.section-heading h2{font-size:42px}.section-helper{display:none}.content-layout{grid-template-columns:1fr}.feed-aside{display:grid;grid-template-columns:1fr 1fr;gap:20px}.aside-note{grid-column:1/-1;margin:0}.filters{display:block}.filter-tabs{justify-content:space-between}.tab{padding:11px 8px}.filter-actions{margin-top:13px}.search-field{flex:1}.search-field input{width:100%}.closing{display:block}.closing p{margin-top:20px}.footer-inner{flex-wrap:wrap;padding-block:20px}}
@media(max-width:500px){.announcement{font-size:9px;letter-spacing:.06em;gap:7px}.brand{font-size:22px}.hero h1{font-size:37px}.eyebrow{font-size:9px}.hero-panel{padding:20px}.quick-nav{grid-template-columns:1fr 1fr}.quick-item{gap:7px}.quick-symbol{font-size:19px}.quick-item strong{font-size:11px}.quick-item small{white-space:normal}.filter-actions{flex-wrap:wrap}.search-field{flex-basis:100%}.feed-aside{display:block}.aside-card{min-height:260px}.item-title{font-size:17px}.item-bottom .external{margin-left:0}.footer-inner>span:nth-child(2){display:none}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
/* Impede que mensagens longas da API ampliem as colunas em telas pequenas. */
.feed-main,.feed-aside,.feedback{min-width:0;overflow-wrap:anywhere}
@media(max-width:790px){.content-layout{grid-template-columns:minmax(0,1fr)}}

/* Marco 2: pesquisas, comunicados oficiais e modo demonstracao. */
.mark-research{background:#ffc18a}
.source-arxiv:before,.source-hf_papers:before{background:#ffc18a}
.source-openai:before{background:#bd7650}
.quick-item:nth-child(4) .quick-symbol{color:var(--accentSoft)}
.demo-banner{background:#ffe4a2;color:#47320b;padding:10px 15px;text-align:center;font-size:12px;font-weight:800}
.demo-tag{color:#855800;border:1px solid #b18d38;background:#fff0b8;padding:3px 6px;border-radius:4px;font-size:9px}

.demo-banner[hidden]{display:none}

@media(max-width:360px){.filter-tabs{flex-wrap:wrap;justify-content:flex-start;gap:2px}.tab{padding:9px 6px;font-size:11px}}


/* Identidade Atualize.me / Ivanzatech — v0.3.
 * “.me” é uma unidade visual: ponto e letras juntos em laranja.
 * Tokens de cor variam por tema para preservar contraste. */
.brand-suffix{white-space:nowrap;transition:color .2s ease}
.brand-icon{box-shadow:0 0 0 1px rgba(245,124,0,.15),0 6px 19px rgba(245,124,0,.14)}
.header{backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.announcement{border-bottom:1px solid rgba(245,124,0,.18)}
:root[data-theme=light] .announcement{background:#fff0e3;color:#813701}
:root[data-theme=light] .aside-card{background:linear-gradient(155deg,#ffb46a,#f78418);color:#241508}
.hero-panel{position:relative;overflow:hidden}
.hero-panel::before{content:"";position:absolute;top:0;right:0;width:48%;height:3px;background:linear-gradient(90deg,transparent,var(--accent));opacity:.85}
.cta-primary:hover,.brand-icon:hover{filter:brightness(1.1)}
.cta-secondary:hover,.theme-toggle:hover{border-color:var(--accent)}
.item-card:hover .item-title{color:var(--accent)}
.tab:hover{color:var(--text)}
.footer-brand .brand-suffix{color:var(--brand)}
@media(prefers-reduced-motion:reduce){.brand-suffix{transition:none}}