/* Protocolo — apibr.click | research-publication | academic-stone */

:root {
  --stone-50: #f7f5f2;
  --stone-100: #ebe8e3;
  --stone-200: #d4cfc6;
  --stone-300: #b0a99c;
  --stone-400: #8a8276;
  --stone-500: #6b645a;
  --stone-600: #524c44;
  --stone-700: #3d3832;
  --stone-800: #2a2622;
  --stone-900: #1a1816;

  --accent: #5c4d3c;
  --accent-muted: #7a6b58;
  --ink: var(--stone-800);
  --ink-muted: var(--stone-500);
  --bg: var(--stone-50);
  --bg-alt: var(--stone-100);
  --border: var(--stone-200);
  --border-strong: var(--stone-300);

  --font-serif: "Source Serif 4", "Georgia", "Times New Roman", serif;
  --font-sans: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "Menlo", "Consolas", monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;

  --container: 960px;
  --reading: 640px;
  --radius: 0;

  --grid-cols: 8;
  --grid-gap: var(--space-4);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 17px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--stone-900);
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 var(--space-3);
  color: var(--stone-900);
}

h1 { font-size: 2rem; letter-spacing: -0.02em; }
h2 { font-size: 1.45rem; }
h3 { font-size: 1.15rem; }

p {
  margin: 0 0 var(--space-4);
}

ul, ol {
  margin: 0 0 var(--space-4);
  padding-left: var(--space-5);
}

li {
  margin-bottom: var(--space-2);
}

.mono-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.bracket-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-muted);
}

.bracket-tag::before { content: "["; }
.bracket-tag::after { content: "]"; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.grid-8 {
  display: grid;
  grid-template-columns: repeat(var(--grid-cols), 1fr);
  gap: var(--grid-gap);
}

.col-span-8 { grid-column: span 8; }
.col-span-6 { grid-column: span 6; }
.col-span-5 { grid-column: span 5; }
.col-span-4 { grid-column: span 4; }
.col-span-3 { grid-column: span 3; }
.col-span-2 { grid-column: span 2; }
.col-start-2 { grid-column-start: 2; }
.col-start-3 { grid-column-start: 3; }

/* Cookie strip */
.cookie-strip {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--stone-800);
  color: var(--stone-100);
  font-size: 0.82rem;
  line-height: 1.45;
  padding: var(--space-2) var(--space-4);
  transform: translateY(-100%);
  transition: transform 0.3s ease;
  border-bottom: 1px solid var(--stone-700);
}

.cookie-strip.is-visible {
  transform: translateY(0);
}

.cookie-strip__inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-4);
}

.cookie-strip p {
  margin: 0;
  flex: 1;
  min-width: 200px;
}

.cookie-strip a {
  color: var(--stone-100);
}

.cookie-strip__actions {
  display: flex;
  gap: var(--space-3);
  align-items: center;
}

.cookie-strip__link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--stone-200);
  text-decoration: none;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

.cookie-strip__link:hover {
  color: #fff;
  text-decoration: underline;
}

body.cookie-visible {
  padding-top: 48px;
}

/* Header — centered-logo */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  padding: var(--space-5) 0 var(--space-4);
}

.site-header__inner {
  text-align: center;
}

.site-logo {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--stone-900);
}

.site-logo:hover {
  color: var(--accent);
}

.site-logo__mark {
  width: 40px;
  height: 40px;
}

.site-logo__name {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.site-logo__tagline {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-top: calc(var(--space-1) * -1);
}

.site-nav {
  margin-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2) var(--space-5);
}

.site-nav a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  color: var(--ink-muted);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--stone-900);
  text-decoration: underline;
}

/* Main */
.site-main {
  flex: 1;
  padding: var(--space-5) 0 var(--space-5);
}

/* Hero — stacked-headlines-no-image */
.hero-stacked {
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--space-5);
}

.hero-stacked__label {
  margin-bottom: var(--space-3);
}

.hero-stacked h1 {
  font-size: 2.35rem;
  max-width: 18ch;
  margin-bottom: var(--space-3);
}

.hero-stacked__deck {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--stone-600);
  max-width: 42ch;
  line-height: 1.5;
  margin: 0;
}

.hero-stacked__meta {
  margin-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

.hero-stacked__svg {
  margin-top: var(--space-5);
  opacity: 0.55;
  max-width: 280px;
}

/* Feed cards — stacked-text-below */
.feed {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.feed-card {
  border-top: 1px solid var(--border);
  padding-top: var(--space-4);
}

.feed-card:first-child {
  border-top: none;
  padding-top: 0;
}

.feed-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
  align-items: center;
  margin-bottom: var(--space-2);
}

.feed-card__title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin: 0 0 var(--space-2);
}

.feed-card__title a {
  color: var(--stone-900);
  text-decoration: none;
}

.feed-card__title a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.feed-card__excerpt {
  color: var(--stone-600);
  font-size: 0.95rem;
  margin: 0 0 var(--space-3);
  max-width: 58ch;
}

.feed-card__footer {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
}

.feed-card__read {
  text-decoration: none;
  color: var(--accent);
}

.feed-card__read:hover {
  text-decoration: underline;
}

/* Article layout — narrow-reading + sticky-toc */
.article-layout {
  display: grid;
  grid-template-columns: 1fr minmax(200px, 220px);
  gap: var(--space-5);
  align-items: start;
}

.article-toc {
  position: sticky;
  top: var(--space-5);
  font-size: 0.82rem;
  border-left: 1px solid var(--border);
  padding-left: var(--space-3);
}

.article-toc__title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  margin: 0 0 var(--space-3);
}

.article-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: toc;
}

.article-toc li {
  margin-bottom: var(--space-2);
  counter-increment: toc;
}

.article-toc a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
  text-decoration: none;
  line-height: 1.4;
  display: block;
}

.article-toc a:hover,
.article-toc a.is-active {
  color: var(--stone-900);
  text-decoration: underline;
}

.article-body {
  max-width: var(--reading);
}

.article-header {
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border);
}

.article-header h1 {
  font-size: 1.85rem;
  margin-bottom: var(--space-3);
}

.article-header__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
}

.article-header__author a {
  color: var(--accent);
}

.article-prose {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.7;
}

.article-prose h2 {
  font-size: 1.3rem;
  margin-top: var(--space-5);
  padding-top: var(--space-2);
}

.article-prose h3 {
  font-size: 1.1rem;
  margin-top: var(--space-4);
}

.article-prose blockquote {
  margin: var(--space-4) 0;
  padding: var(--space-3) var(--space-4);
  border-left: 2px solid var(--border-strong);
  background: var(--bg-alt);
  font-style: italic;
  color: var(--stone-600);
}

.article-prose code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--bg-alt);
  padding: 1px 4px;
  border: 1px solid var(--border);
}

.article-prose pre {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: var(--stone-900);
  color: var(--stone-100);
  padding: var(--space-4);
  overflow-x: auto;
  margin: var(--space-4) 0;
  line-height: 1.5;
}

.article-prose pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
}

.article-note {
  margin-top: var(--space-5);
  padding: var(--space-4);
  border: 1px solid var(--border);
  background: var(--bg-alt);
  font-size: 0.88rem;
}

.article-related {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}

.article-related h2 {
  font-size: 1rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.article-related ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.article-related li {
  margin-bottom: var(--space-2);
}

/* Page sections */
.page-header {
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  font-size: 1.75rem;
}

.page-prose {
  max-width: var(--reading);
}

.page-prose--wide {
  max-width: none;
}

/* Authors */
.author-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: var(--grid-gap);
}

.author-card {
  grid-column: span 8;
  padding: var(--space-4) 0;
  border-top: 1px solid var(--border);
}

.author-card:first-child {
  border-top: none;
}

@media (min-width: 640px) {
  .author-card {
    grid-column: span 4;
    border-top: none;
    padding: var(--space-4);
    border: 1px solid var(--border);
    background: var(--bg);
  }

  .author-card:nth-child(n+3) {
    margin-top: 0;
  }
}

.author-card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-3);
  opacity: 0.7;
}

.author-card h2 {
  font-size: 1.15rem;
  margin-bottom: var(--space-1);
}

.author-card__role {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
  margin-bottom: var(--space-3);
}

.author-card p {
  font-size: 0.92rem;
  color: var(--stone-600);
  margin: 0;
}

/* Contact */
.contact-block {
  max-width: var(--reading);
}

.contact-block dl {
  margin: var(--space-4) 0;
}

.contact-block dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
  margin-bottom: var(--space-1);
}

.contact-block dd {
  margin: 0 0 var(--space-4);
}

/* Legal */
.legal-prose {
  max-width: var(--reading);
  font-size: 0.92rem;
}

.legal-prose h2 {
  font-size: 1.1rem;
  margin-top: var(--space-5);
}

/* Footer — minimal-single */
.site-footer {
  border-top: 1px solid var(--border);
  padding: var(--space-5) 0;
  margin-top: auto;
  font-size: 0.82rem;
  color: var(--ink-muted);
}

.site-footer__inner {
  text-align: center;
}

.site-footer__brand {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--stone-700);
  margin-bottom: var(--space-2);
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2) var(--space-4);
  margin-bottom: var(--space-3);
}

.site-footer__links a {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--ink-muted);
}

.site-footer__links a:hover {
  color: var(--stone-900);
  text-decoration: underline;
}

.site-footer__copy {
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

/* Articles index */
.articles-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.articles-list__item {
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border);
}

.articles-list__item:last-child {
  border-bottom: none;
}

/* Decorative abstract SVG placement */
.editorial-ornament {
  margin: var(--space-5) 0;
  opacity: 0.4;
  max-width: 120px;
}

/* Responsive */
@media (max-width: 768px) {
  .grid-8 {
    grid-template-columns: 1fr;
  }

  .col-span-8,
  .col-span-6,
  .col-span-5,
  .col-span-4,
  .col-span-3,
  .col-span-2,
  .col-start-2,
  .col-start-3 {
    grid-column: 1 / -1;
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-toc {
    position: relative;
    top: 0;
    order: -1;
    border-left: none;
    border-bottom: 1px solid var(--border);
    padding: 0 0 var(--space-4);
    margin-bottom: var(--space-4);
  }

  h1 { font-size: 1.65rem; }
  .hero-stacked h1 { font-size: 1.85rem; }

  .author-card {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cookie-strip { transition: none; }
}