/* Screen optimized styles for the ATI Whitepaper */

/* =========================================================================
   1. VARIABLES & FONTS
   ========================================================================= */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;1,400;1,500&family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@300;400&display=swap');

:root {
    /* Brand Colors (FoundLab Premium Editorial) */
    --azul-deep: #0F141E;   /* Carvão profundo — title, body strong, accent estrutural */
    --acento:    #5E6A78;   /* Slate grey — table headers, eyebrows, metadata labels */
    --destaque:  #A88965;   /* Bronze/champagne — ÚNICA cor de assinatura */
    --ink:       #2C3338;   /* Body text default */
    --ink-soft:  #606B75;   /* Body text secundário, leads, captions */
    --rule:      #E8EBEF;   /* Hairline rules, table borders, dividers */
    --paper:     #FFFFFF;   /* Background paper */
    --tint:      #F8F9FA;   /* Code background, callout info background */
    --tint-warn: #FDFBF7;   /* Callout draft background (warm cream, sutil) */
    
    /* Typography */
    --serif: 'Cormorant Garamond', Georgia, "Times New Roman", serif;
    --sans: 'Inter', system-ui, -apple-system, sans-serif;
    --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, monospace;
}

/* =========================================================================
   2. GLOBAL RESET & BASE
   ========================================================================= */
body {
    font-family: var(--sans);
    color: var(--ink);
    background-color: var(--azul-deep);
    line-height: 1.65;
    margin: 0;
    padding: 0;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

* {
    box-sizing: border-box;
}

/* =========================================================================
   3. LAYOUT & CONTAINERS
   ========================================================================= */
body > section {
    max-width: 850px;
    margin: 4rem auto;
    background-color: var(--paper);
    padding: 5rem 6rem;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    border-radius: 2px;
}

@media (max-width: 768px) {
    body > section {
        margin: 1rem;
        padding: 2.5rem 2rem;
    }
}

/* =========================================================================
   4. TYPOGRAPHY (Headers, Paragraphs)
   ========================================================================= */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--serif);
    color: var(--azul-deep);
    font-weight: 400;
    line-height: 1.1;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

h2.h-sec, h2 {
    font-size: 1.8rem;
    font-weight: 500;
    border-bottom: 1px solid var(--rule);
    padding-bottom: 0.5rem;
    margin-top: 3rem;
}

h3 { 
    font-family: var(--sans); 
    font-size: 0.85rem; 
    font-weight: 500; 
    text-transform: uppercase; 
    letter-spacing: 0.15em; 
    color: var(--azul-deep); 
    margin-top: 2rem;
}

p {
    margin-bottom: 1.2rem;
    text-align: justify;
}

.lead, .big-claim, .standfirst {
    font-family: var(--sans);
    font-size: 1.25rem;
    color: var(--azul-deep);
    line-height: 1.5;
    font-weight: 300;
    margin: 2rem 0;
    text-align: left;
}

a {
    color: var(--destaque);
    text-decoration: none;
    border-bottom: 1px dotted var(--destaque);
    transition: all 0.2s ease;
}

a:hover {
    color: var(--azul-deep);
    border-bottom-color: var(--azul-deep);
}

strong, b {
    font-weight: 600;
    color: var(--azul-deep);
}

em, i {
    color: var(--ink-soft);
}

/* =========================================================================
   5. COVER PAGE (.cover)
   ========================================================================= */
.cover {
    text-align: center;
    border-top: 4px solid var(--azul-deep);
    padding-top: 6rem;
    padding-bottom: 6rem;
    position: relative;
}

.cv-kick {
    font-family: var(--sans);
    color: var(--acento);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 2rem;
}

.cv-title {
    font-size: 3rem;
    font-family: var(--serif);
    color: var(--azul-deep);
    font-weight: 400;
    margin: 1rem 0;
    line-height: 1.05;
    border: none;
}

.cv-title .lo {
    color: var(--destaque);
}

.cv-sub {
    font-size: 1.3rem;
    font-family: var(--sans);
    color: var(--ink-soft);
    margin-bottom: 3rem;
    font-weight: 300;
}

.cv-brand {
    font-family: var(--sans);
    color: var(--azul-deep);
    font-size: 1rem;
    margin-top: 3rem;
}

.cv-loc {
    font-family: var(--sans);
    color: var(--ink-soft);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* Abstract Box */
.cv-abstract {
    background: var(--tint);
    padding: 2.5rem;
    border: 1px solid var(--rule);
    border-left: 2px solid var(--destaque);
    margin-top: 4rem;
    text-align: left;
    border-radius: 2px;
}

.cv-abstract .lab {
    display: block;
    font-family: var(--sans);
    font-weight: 500;
    color: var(--destaque);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.cv-abstract p {
    margin: 0;
    font-size: 1.1rem;
    line-height: 1.6;
}

/* Badges */
.cv-badges {
    margin-top: 3rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
}

.cv-badges span {
    font-family: var(--sans);
    font-size: 0.75rem;
    background: var(--tint);
    color: var(--acento);
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--rule);
    border-radius: 100px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-weight: 500;
}

/* Cover Footer */
.cv-foot {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-top: 4rem;
    font-family: var(--sans);
    font-size: 0.9rem;
    text-align: left;
    border-top: 1px solid var(--rule);
    padding-top: 2rem;
}

.cv-foot .blk .lab {
    display: block;
    color: var(--acento);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.cv-foot .blk .val {
    display: block;
    font-weight: 500;
    color: var(--azul-deep);
    line-height: 1.4;
}

/* =========================================================================
   6. INNER CONTENT COMPONENTS
   ========================================================================= */

/* Kicker and Runtag */
.runtag, .kicker, .eyebrow {
    display: block;
    font-family: var(--sans);
    color: var(--acento);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

/* Cards */
.card {
    border: 1px solid var(--rule);
    padding: 1.5rem 2rem;
    margin: 1.5rem 0;
    border-radius: 2px;
    background: var(--paper);
}

.card .who {
    display: block;
    font-family: var(--sans);
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--acento);
    letter-spacing: 0.05em;
}

.card .ti {
    display: block;
    font-family: var(--serif);
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--azul-deep);
    margin: 0.5rem 0 1rem 0;
}

.card p {
    margin: 0;
    font-size: 0.95rem;
    text-align: left;
}

/* Grids */
.cols2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin: 2rem 0;
}

.triad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin: 2.5rem 0;
}

.triad .t {
    background: var(--tint);
    border-top: 2px solid var(--destaque);
    padding: 1.5rem;
}

.triad .n {
    display: block;
    font-family: var(--sans);
    color: var(--destaque);
    font-weight: 500;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.triad .h {
    display: block;
    font-family: var(--serif);
    font-weight: 500;
    color: var(--azul-deep);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.triad p {
    font-size: 0.9rem;
    margin: 0;
    text-align: left;
}

@media (max-width: 768px) {
    .cols2, .triad, .cv-foot {
        grid-template-columns: 1fr;
        flex-direction: column;
        gap: 1.5rem;
    }
}

/* Callouts / Notes */
.vnote {
    background: var(--tint-warn);
    border-left: 2px solid var(--destaque);
    padding: 1.5rem;
    margin: 2rem 0;
    font-family: var(--sans);
    font-size: 0.95rem;
    text-align: left;
}

.vnote b {
    color: var(--destaque);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    display: block;
    margin-bottom: 0.5rem;
}

/* Rules */
hr.rule-bronze {
    border: 0;
    height: 1px;
    background: var(--destaque);
    margin: 2rem 0;
}

/* Chips */
.chip {
    font-family: var(--sans);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
    padding: 0.2rem 0.5rem;
    border-radius: 2px;
    border: 1px solid;
    display: inline-block;
    margin: 0.2rem;
}
.chip.shipped { color: var(--azul-deep); border-color: var(--azul-deep); }
.chip.poc { color: var(--destaque); border-color: var(--destaque); }
.chip.beta { color: var(--acento); border-color: var(--acento); }
.chip.spec { color: var(--ink-soft); border-color: var(--ink-soft); }

/* =========================================================================
   7. CODE & PREFORMATTED
   ========================================================================= */
code {
    font-family: var(--mono);
    background-color: var(--tint);
    color: var(--acento);
    padding: 0.1em 0.3em;
    border-radius: 2px;
    font-size: 0.85em;
    border: 1px solid var(--rule);
}

pre {
    background-color: var(--tint);
    color: var(--ink);
    padding: 1.5rem;
    border-radius: 2px;
    border: 1px solid var(--rule);
    overflow-x: auto;
    font-family: var(--mono);
    font-size: 0.85em;
    line-height: 1.5;
}

pre code {
    background-color: transparent;
    border: none;
    color: inherit;
    padding: 0;
}

.k { color: var(--destaque); } 
.s { color: var(--ink-soft); } 
.v { color: var(--azul-deep); } 

/* =========================================================================
   8. TABLES
   ========================================================================= */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 2em 0;
    font-family: var(--sans);
    font-size: 0.85rem;
}

th, td {
    border: 1px solid var(--rule);
    padding: 1rem;
    text-align: left;
}

th {
    background-color: var(--paper);
    font-weight: 500;
    color: var(--acento);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.75rem;
    border-bottom: 1px solid var(--azul-deep);
}

tr:last-child td {
    border-bottom: none;
}

/* =========================================================================
   9. PRINT HIDING
   ========================================================================= */
.print-only,
.page-break,
@page {
    display: none !important;
}

/* Fix missing opener classes */
.op-num { font-family: var(--serif); font-size: 1.5rem; color: var(--acento); margin-bottom: 0.5rem; }
.op-kick { font-family: var(--sans); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--acento); margin-bottom: 1rem; }
.op-title { font-family: var(--serif); font-size: 2.5rem; color: var(--azul-deep); margin-bottom: 0.5rem; line-height: 1.1; }
.op-sub { font-family: var(--sans); font-size: 1.25rem; font-weight: 300; color: var(--ink-soft); margin-bottom: 2.5rem; }
.op-abs { background: var(--tint); padding: 2rem; border-left: 2px solid var(--destaque); margin-bottom: 2.5rem; }
.op-abs .lab { display: block; font-family: var(--sans); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--acento); margin-bottom: 1rem; font-weight: 500; }
.op-toc { display: flex; flex-wrap: wrap; gap: 1.5rem; font-family: var(--sans); font-size: 0.9rem; padding-top: 2rem; border-top: 1px solid var(--rule); }
.op-toc span b { color: var(--azul-deep); font-weight: 600; }


/* TOC specific styles */
.grp { margin-bottom: 1.5rem; }
.lvl1 { display: flex; align-items: baseline; font-family: var(--serif); font-size: 1.35rem; color: var(--azul-deep); font-weight: 500; margin-bottom: 0.5rem; }
.rn { font-family: var(--sans); font-size: 0.85rem; color: var(--destaque); width: 30px; flex-shrink: 0; font-weight: 500; }
.lvl2 { display: flex; align-items: baseline; font-family: var(--sans); font-size: 0.95rem; color: var(--ink-soft); margin-bottom: 0.4rem; padding-left: 30px; }
.tt { margin-right: 0.5rem; }
.dots { flex-grow: 1; border-bottom: 1px dotted var(--rule); margin: 0 0.5rem; position: relative; top: -4px; }
.pg::after { content: attr(data-toc); font-family: var(--mono); font-size: 0.75rem; color: var(--acento); }
.tk { font-family: var(--sans); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--acento); margin-bottom: 0.5rem; }


/* Definitions and Equations */
.defbox { background: var(--paper); border: 1px solid var(--rule); border-left: 3px solid var(--azul-deep); padding: 2rem; margin: 2.5rem 0; border-radius: 2px; }
.defbox .lab { display: block; font-family: var(--sans); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--acento); margin-bottom: 1rem; font-weight: 500; }
.defbox .def { font-family: var(--serif); font-size: 1.35rem; color: var(--azul-deep); line-height: 1.5; font-style: italic; display: block; }
.eq { text-align: center; margin: 3rem 0; font-family: var(--mono); font-size: 1.1rem; color: var(--azul-deep); position: relative; padding: 2rem 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.eqno { position: absolute; right: 0; color: var(--acento); font-family: var(--sans); font-size: 0.9rem; }
.tight { padding: 1.5rem 0; margin: 2rem 0; }
.regrow { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.5rem; margin: 2.5rem 0; border-top: 1px solid var(--rule); padding-top: 2rem; }
.regrow .r { padding-right: 1.5rem; border-right: 1px solid var(--rule); }
.regrow .r:last-child { border-right: none; }
.regrow .st { display: block; font-family: var(--sans); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--destaque); margin-bottom: 0.5rem; font-weight: 500; }
.regrow .n { font-family: var(--serif); font-size: 1.25rem; font-weight: 500; color: var(--azul-deep); margin-bottom: 0.75rem; display: block; }
.regrow p { font-size: 0.9rem; margin: 0; }
.invariant { background: var(--tint); border: 1px solid var(--rule); padding: 2rem; margin: 2.5rem 0; border-radius: 2px; }
.invariant .lab { display: block; font-family: var(--sans); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--destaque); margin-bottom: 1rem; font-weight: 600; }
.invariant p { margin: 0; font-family: var(--serif); font-size: 1.2rem; color: var(--azul-deep); }



/* Additional unstyled elements */
.cv-abstract p { margin-top: 1rem; }
.runtag { font-family: var(--sans); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.15em; color: var(--acento); margin-bottom: 0.5rem; display: block; }
.kicker { font-family: var(--sans); font-size: 0.85rem; color: var(--ink-soft); margin-bottom: 2rem; }
.pull { font-family: var(--serif); font-size: 1.5rem; font-style: italic; color: var(--azul-deep); text-align: center; margin: 3rem auto; max-width: 80%; padding: 2rem 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }