:root {
  color-scheme: light dark;
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #16181d;
  --muted: #4b5260;
  --border: #dde0e6;
  --link: #0a58b5;
  --button-bg: #16181d;
  --button-text: #ffffff;
  --focus: #0a58b5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0e11;
    --card: #17191e;
    --text: #eceef2;
    --muted: #b4bac6;
    --border: #2a2d35;
    --link: #8bbcff;
    --button-bg: #eceef2;
    --button-text: #16181d;
    --focus: #8bbcff;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 16px;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.55;
}

.card {
  width: 100%;
  max-width: 34rem;
  margin: 16px 0;
  padding: 24px 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.logo {
  display: block;
  width: 120px;
  max-width: 50%;
  height: auto;
  margin: 0 0 20px;
}

h1 {
  margin: 0 0 16px;
  font-size: 1.5rem;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

h1.plain {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0;
}

p {
  margin: 0 0 14px;
  overflow-wrap: anywhere;
}

a {
  color: var(--link);
}

a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.button {
  display: block;
  padding: 14px 18px;
  background: var(--button-bg);
  color: var(--button-text);
  border-radius: 8px;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
}

.button:hover {
  opacity: 0.9;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
}

/* ----- painel (Bloco 5b) ----- */

.card.wide {
  max-width: 46rem;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  margin: 0 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.topbar .who {
  flex: 1 1 auto;
  color: var(--muted);
  overflow-wrap: anywhere;
}

form.inline {
  display: inline;
  margin: 0;
}

.linklike {
  padding: 0;
  border: 0;
  background: none;
  color: var(--link);
  font: inherit;
  text-decoration: underline;
  cursor: pointer;
}

h2 {
  margin: 24px 0 12px;
  font-size: 1.2rem;
  line-height: 1.3;
  overflow-wrap: anywhere;
}

h3 {
  margin: 16px 0 8px;
  font-size: 1rem;
  overflow-wrap: anywhere;
}

label {
  display: block;
  margin: 14px 0 6px;
  font-weight: 600;
}

input[type="text"],
input[type="password"],
input[type="url"],
textarea {
  display: block;
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

textarea {
  resize: vertical;
}

input:focus-visible,
textarea:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

button.button {
  width: 100%;
  margin-top: 16px;
  border: 0;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.button.secondary {
  background: transparent;
  color: var(--text);
  border: 2px solid var(--button-bg);
}

.muted {
  color: var(--muted);
  font-size: 0.9rem;
}

.error {
  padding: 10px 12px;
  border-left: 4px solid #b3261e;
  background: var(--bg);
  font-weight: 600;
}

.ok {
  padding: 10px 12px;
  border-left: 4px solid #1b7f3a;
  background: var(--bg);
  font-weight: 600;
}

.warning {
  padding: 10px 12px;
  border-left: 4px solid #b26a00;
  background: var(--bg);
}

.item,
.third {
  margin: 0 0 14px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.item h2 {
  margin-top: 0;
}

.third {
  border-left: 4px solid var(--muted);
}

.third .tag {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.8rem;
}

.third .author {
  margin: 0 0 6px;
  font-weight: 600;
}

blockquote {
  margin: 0 0 10px;
  padding: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.caption {
  white-space: pre-wrap;
}

dl.stats {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 16px;
  margin: 0 0 14px;
}

dl.stats dt {
  color: var(--muted);
  overflow-wrap: anywhere;
}

dl.stats dd {
  margin: 0;
  font-weight: 600;
  text-align: right;
  overflow-wrap: anywhere;
}

dd.hash {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.8rem;
  grid-column: 1 / -1;
  text-align: left;
  word-break: break-all;
}

img.preview {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 0 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
}