/* Visual identity: Conteúdo automático —
   off-white editorial, near-black heavy sans, single green accent for action. */

:root {
  --font-family: Inter, Helvetica, Arial, sans-serif;
  --font-family-mono: "JetBrains Mono", SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;

  --color-background: #F7F5EF;
  --color-surface: #FFFFFF;
  --color-text: #101113;
  --color-text-subtle: #68686D;
  --color-accent: #35C94A;
  --color-accent-hover: #2DB640;
  --color-accent-soft: #E4F8E6;
  --color-border: #E7E5DF;

  --radius-sm: 14px;
  --radius-md: 22px;
  --radius-pill: 999px;
  --shadow-card: 0 12px 32px rgba(16, 17, 19, 0.06);

  --content-width: 41rem;
  --header-width: 52rem;

  --space-small: 0.5rem;
  --space-medium: 1rem;
  --space-neutral: 1.5rem;
  --space-large: 2rem;
  --space-x-large: 3rem;
  --space-xx-large: 4.5rem;

  --transition: 0.15s cubic-bezier(0.33, 1, 0.68, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #101113;
    --color-surface: #191A1E;
    --color-text: #F4F1EA;
    --color-text-subtle: #9BA0A3;
    --color-accent: #3DD85A;
    --color-accent-hover: #2DB640;
    --color-accent-soft: #123A1B;
    --color-border: #26282D;
    --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.45);
  }
}

html {
  color-scheme: light dark;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: var(--space-xx-large) var(--space-large);

  background-color: var(--color-background);
  color: var(--color-text);

  font-family: var(--font-family);
  font-size: 18px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--color-accent); color: #101113; }


/* Top bar */

.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  background: color-mix(in srgb, var(--color-background) 86%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}
@supports not (background: color-mix(in srgb, #fff 50%, transparent)) {
  .topbar { background: var(--color-background); }
}

.topbar-inner {
  max-width: 62rem;
  margin-inline: auto;
  padding: 0 var(--space-neutral);
  min-height: 60px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--color-text);
  text-decoration: none;
}
.brand:hover { color: var(--color-text); }
.brand-mark {
  position: relative;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: var(--color-accent);
  flex: none;
}
.brand-mark::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--color-accent-ink);
  clip-path: polygon(50% 18%, 68% 40%, 86% 34%, 66% 60%, 78% 82%, 50% 66%, 22% 82%, 34% 60%, 14% 34%, 32% 40%);
}

.topbar-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 4px;
}
.lang-switch a {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .02em;
  padding: 5px 10px;
  border-radius: var(--radius-pill);
  color: var(--color-text-subtle);
  text-decoration: none;
}
.lang-switch a:hover { background: var(--color-accent-soft); color: var(--color-text); }
.lang-switch a.is-active { background: var(--color-text); color: var(--color-background); }

.topbar-icon {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-surface);
  color: var(--color-text);
  transition: background-color var(--transition), transform var(--transition), color var(--transition);
}
.topbar-icon:hover { background: var(--color-accent); color: var(--color-accent-ink); transform: translateY(-1px); border-color: transparent; }

.topbar-cta {
  font-size: 13.5px;
  font-weight: 800;
  letter-spacing: -0.005em;
  padding: 10px 17px;
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
}
.topbar-cta:hover { background: var(--color-accent); color: var(--color-text); transform: translateY(-1px); }

.topbar-btn {
  font-size: 13.5px;
  font-weight: 800;
  letter-spacing: -0.005em;
  padding: 10px 17px;
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition), transform var(--transition);
}
.topbar-btn:hover { border-color: var(--color-accent); color: var(--color-accent); transform: translateY(-1px); }

header,
article,
footer {
  max-width: var(--content-width);
  margin-inline: auto;
}

header {
  margin-top: 15px;
  margin-bottom: var(--space-x-large);
  text-align: center;
}

body.home header {
  max-width: var(--header-width);
}

header p {
  color: var(--color-text-subtle);
  font-size: 19px;
  text-wrap: balance;
}

header a,
header a:visited {
  color: var(--color-text);
  text-decoration-color: var(--color-border);
}

header a:hover {
  color: var(--color-accent);
  text-decoration-color: var(--color-accent);
}

.photo-circle {
  position: relative;
  display: block;
  width: clamp(150px, 30vw, 208px);
  aspect-ratio: 1;
  margin: 0 auto var(--space-neutral);
  border-radius: 50%;
  border: 2px solid var(--color-accent);
  box-shadow: 0 0 0 6px var(--color-background), var(--shadow-card);
  overflow: hidden;
}

.photo-circle img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity .55s ease, transform .55s ease;
  will-change: opacity, transform;
}

.photo-circle .photo-a { opacity: 1; }
.photo-circle .photo-b { opacity: 0; }
.photo-circle:hover .photo-a { opacity: 0; }
.photo-circle:hover .photo-b { opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  .photo-circle img { transition: none; }
}

h1, h2, h3 {
  line-height: 1.1;
  text-wrap: balance;
}

h1 {
  margin: 0 0 var(--space-medium);
  font-size: clamp(2.4rem, 6vw, 3.4rem);
  font-weight: 900;
  letter-spacing: -0.045em;
}

body.home h1 {
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  letter-spacing: -0.03em;
}

h1 .initial {
  color: var(--color-accent);
}

h2 {
  margin: var(--space-x-large) 0 var(--space-small);
  font-size: clamp(1.5rem, 3.4vw, 1.85rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

h2::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  vertical-align: 0.22em;
  margin-right: 12px;
}

h3 {
  margin: var(--space-large) 0 var(--space-small);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

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

strong {
  font-weight: 800;
  color: var(--color-text);
}

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

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

blockquote {
  margin: var(--space-large) 0;
  padding: var(--space-neutral) var(--space-large);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
  color: var(--color-text);
  font-size: 19px;
  font-weight: 600;
}

small {
  font-size: 0.85rem;
  color: var(--color-text-subtle);
}

a {
  color: var(--color-text);
  font-weight: 600;
  text-decoration-thickness: 0.08em;
  text-decoration-color: var(--color-border);
  text-underline-offset: 0.15em;
  transition: color var(--transition), text-decoration-color var(--transition);
}

a:hover {
  color: var(--color-accent);
  text-decoration-color: var(--color-accent);
}

pre, code {
  font-family: var(--font-family-mono);
  font-size: 0.85rem;
}

code {
  padding: 0.1em 0.3em;
  border-radius: 6px;
  background-color: var(--color-accent-soft);
  color: var(--color-text);
}

pre {
  margin: var(--space-medium) 0;
  padding: var(--space-medium);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);

  line-height: 1.5;
  white-space: pre;
  word-wrap: normal;
  overflow: auto;
}

pre code {
  padding: 0;
  background: none;
}

article img {
  display: block;
  width: 100%;
  height: auto;
  margin-block: var(--space-small);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  filter: grayscale(1) contrast(1.05);
}

footer {
  margin-top: var(--space-xx-large);
  padding-top: var(--space-large);
  border-top: 1px solid var(--color-border);
  font-size: 0.85rem;
  color: var(--color-text-subtle);
}

@media screen and (max-width: 40rem) {
  body {
    padding: var(--space-large) var(--space-neutral);
    font-size: 17px;
    word-wrap: break-word;
  }

  .brand-name { display: none; }
  .topbar-inner { padding: 0 var(--space-medium); gap: 10px; }
  .topbar-nav { gap: 10px; }
  .topbar-cta { padding: 9px 13px; font-size: 12.5px; }

  .photo-circle {
    width: clamp(140px, 44vw, 190px);
  }

  header {
    text-align: left;
  }

  header p {
    text-align: left;
  }

  h2 {
    margin-top: var(--space-large);
  }
}

/* Post cards (Substack + Medium) */

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-medium);
  margin: var(--space-medium) 0 var(--space-small);
}

.post-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: none;
  margin: 0;
  padding: var(--space-neutral);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: none;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.post-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card);
}

.post-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-subtle);
}
.post-meta time { font-weight: 600; }

.post-source {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.post-source::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
}
.post-card[data-source="Medium"] .post-source::before { background: #7A7A7A; }
.post-card[data-source="Substack"] .post-source::before { background: var(--color-accent); }

.post-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.35;
}
.post-title a { text-decoration: none; }

.post-excerpt {
  margin: 0;
  font-size: 0.87rem;
  color: var(--color-text-subtle);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-foot {
  margin-top: auto;
  padding-top: 4px;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--color-accent);
}

@media screen and (max-width: 40rem) {
  .post-grid { grid-template-columns: 1fr; }
}