:root {
  --bg: #15181c;
  --bg-card: #23272f;
  --accent: #00ffd0;
  --text: #ececec;
  --secondary: #9ca3af;
  --border: #2e3240;
  --code-bg: #181c22;
  --code-color: #fcd34d;
  --highlight: #009688;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', Arial, sans-serif;
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  text-align: center;
  padding: 48px 16px 32px;
  background: linear-gradient(135deg, #23272f 70%, #2c3642 100%);
  border-bottom: 1px solid var(--border);
  position: relative;
}
.svg-center {
  display: block;
  margin: 1.5em auto;
  /*max-width: 600px;     /* deixa eles bem grandes 
  /*width: 100%;*/
  height: auto;
}

.main-illustration {
  width: 120px;
  height: 120px;
  margin-bottom: 18px;
  display: inline-block;
  animation: float 2.5s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0);}
  50% { transform: translateY(-12px);}
}

h1 {
  margin: 0 0 8px 0;
  font-size: 2.7rem;
  font-weight: 700;
  letter-spacing: -1px;
  background: linear-gradient(90deg, var(--accent) 20%, #2af598 70%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: var(--secondary);
  font-size: 1.15rem;
  margin-bottom: 12px;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 16px 56px;
  flex: 1 0 auto;
}

.checklist {
  display: flex;
  flex-direction: column;
  gap: 28px;
  margin-top: 20px;
}
.card {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 20px;
  padding: 32px 24px 24px;
  position: relative;
  box-shadow: 0 4px 18px #0003;
  transition: transform 0.18s;
}
.card:hover {
  transform: translateY(-4px) scale(1.015);
  border-color: var(--accent);
}
.step-num {
  position: absolute;
  top: -22px;
  left: 24px;
  background: var(--accent);
  color: #15181c;
  font-weight: bold;
  font-size: 1.2rem;
  border-radius: 50%;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 12px #00ffd044;
  border: 2.5px solid #161920;
}
.card h2 {
  margin-top: 0;
  color: var(--accent);
  font-size: 1.32rem;
  letter-spacing: 0.01em;
  margin-bottom: 8px;
}
.card ul, .card ol {
  margin: 0 0 0 16px;
  padding: 0;
}
.card ul li {
  margin-bottom: 6px;
}
.card code, pre {
  background: var(--code-bg);
  color: var(--code-color);
  border-radius: 7px;
  padding: 2px 7px;
  font-size: 1.06em;
  font-family: 'Fira Mono', 'Consolas', 'Menlo', monospace;
}
pre {
  display: block;
  padding: 20px;
  margin: 18px 0;
  overflow-x: auto;
  font-size: 1.03em;
  color: #ffd479;
  border: 1.5px solid #272f37;
}
.tips {
  margin: 30px 0;
  background: linear-gradient(90deg, #282d35 60%, #23272f 100%);
  border-left: 6px solid var(--accent);
  border-radius: 11px;
  padding: 20px 30px 20px 22px;
  color: #b8fff2;
  font-size: 1.09rem;
  box-shadow: 0 2px 18px #00ffd014;
}
.summary-visual {
  margin-top: 36px;
  background: linear-gradient(90deg, #23272f 80%, #313844 100%);
  border: 1.5px solid var(--border);
  border-radius: 15px;
  padding: 24px 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  align-items: center;
  justify-content: space-around;
  color: #d1d5db;
}
.summary-visual strong {
  color: var(--accent);
  font-weight: bold;
}
.folder-structure {
  background: #181c22;
  border: 1.5px solid #272f37;
  border-radius: 11px;
  padding: 17px 22px;
  margin: 16px 0;
  font-size: 0.98em;
  color: #83ffe0;
  font-family: 'Fira Mono', 'Consolas', monospace;
  white-space: pre;
}
footer {
  width: 100%;
  background: #181c22;
  color: #94ffed;
  font-size: 1rem;
  text-align: center;
  padding: 18px 10px 13px;
  border-top: 1.5px solid #23272f;
  margin-top: auto;
  letter-spacing: 0.02em;
}
footer a {
  color: var(--accent);
  text-decoration: none;
  font-weight: bold;
  transition: color 0.15s;
}
footer a:hover { color: #0aeec9; }
.btn-voltar {
  position: fixed;
  top: 22px;
  left: 22px;
  z-index: 100;
  background: #181c22cc;
  border-radius: 50%;
  border: 1.5px solid #23272f;
  box-shadow: 0 2px 12px #00ffd044;
  padding: 7px;
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.18s;
  width: 45px;
  height: 45px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.btn-voltar:hover {
  background: #181c22;
  box-shadow: 0 4px 22px #00ffd060;
}
@media (max-width: 640px) {
  header { padding: 36px 8px 18px;}
  main { padding: 16px 6px 32px; }
  .summary-visual { flex-direction: column; gap: 18px;}
  .card { padding: 22px 10px 18px; }
  .step-num { left: 10px; }
  .btn-voltar { top: 12px; left: 12px; width: 38px; height: 38px;}
}


.footer-brand {
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-left: 6px;
  display: inline-flex;
  align-items: center;
  gap: 3px;
}
.copyright-symbol {
  color: #00ffd0;
  font-size: 1.04em;
  margin-right: 2px;
  vertical-align: middle;
}
.brand-link {
  color: #00ffd0;
  font-weight: bold;
  text-decoration: none;
  margin-left: 2px;
  transition: color 0.2s;
}
.brand-link:hover {
  color: #0aeec9;
  text-decoration: underline;
}
.footer-sep {
  margin: 0 5px;
  color: #44fff5;
  opacity: 0.7;
  font-size: 1.1em;
}