:root {
  --fundo: #0d1117;
  --superficie: #161b22;
  --borda: #30363d;
  --texto: #e6edf3;
  --texto-suave: #8b949e;
  --destaque: #58a6ff;
  --erro: #ff7b72;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--fundo);
  color: var(--texto);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 16px;
}

h1 {
  margin: 0 0 8px;
  font-family: Georgia, serif;
  font-weight: normal;
  font-size: 2.4rem;
}

header p {
  margin: 0 0 32px;
  color: var(--texto-suave);
}

form {
  display: grid;
  grid-template-columns: 1fr 2fr auto;
  grid-template-rows: auto auto;
  grid-auto-flow: column;
  gap: 6px 12px;
  align-items: end;
  padding: 20px;
  background: var(--superficie);
  border: 1px solid var(--borda);
  border-radius: 10px;
}

label {
  font-size: 0.85rem;
  color: var(--texto-suave);
}

input {
  width: 100%;
  padding: 10px 12px;
  font: inherit;
  color: var(--texto);
  background: var(--fundo);
  border: 1px solid var(--borda);
  border-radius: 6px;
}

input:focus {
  outline: 2px solid var(--destaque);
  outline-offset: 1px;
}

button {
  padding: 10px 20px;
  font: inherit;
  font-weight: 600;
  color: var(--fundo);
  background: var(--destaque);
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

form button {
  grid-row: 2;
}

button:hover {
  filter: brightness(1.1);
}

#mensagem {
  min-height: 1.5em;
  margin: 12px 0;
  color: var(--erro);
}

figure {
  margin: 0;
}

figure svg {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--borda);
  border-radius: 10px;
}

#baixar {
  margin-top: 16px;
  color: var(--texto);
  background: transparent;
  border: 1px solid var(--borda);
}

@media (max-width: 560px) {
  form {
    grid-template-columns: 1fr;
    grid-template-rows: none;
    grid-auto-flow: row;
  }

  form button {
    grid-row: auto;
  }
}