/* ===== FONTES & CORES ===== */
:root {
  --bg1: #0a0a0a;
  --bg2: #101820;
  --bg3: #182830;
  --accent: #00b3ff;
  --accent-light: #72d8ff;
  --text-light: #ffffff;
  --text-soft: #9bb4c8;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(135deg, var(--bg1), var(--bg2), var(--bg3));
  color: var(--text-light);
}

/* ===== HEADER ===== */
header {
  text-align: center;
  padding: 30px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
h1 { font-size: 2.8rem; margin-bottom: 5px; }
.subtitle { color: var(--accent-light); font-size: 1.2rem; }

/* ===== HERO ===== */
.hero {
  text-align: center;
  padding: 30px 20px;
}
.intro { font-size: 1.1rem; max-width: 700px; margin: 0 auto 20px; }
button {
  background: var(--accent);
  color: #000;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: .2s;
}
button:hover { background: var(--accent-light); }
#ctaMessage { margin-top: 15px; color: var(--accent-light); }

/* ===== FEATURES ===== */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px,1fr));
  gap: 20px;
  padding: 30px 20px;
  max-width: 1000px;
  margin: auto;
}
.card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 20px;
  text-align: center;
  border-radius: 12px;
  backdrop-filter: blur(6px);
  transition: .25s;
}
.card:hover { transform: translateY(-6px); }

/* ===== FOOTER ===== */
footer {
  text-align: center;
  padding: 20px;
  color: var(--text-soft);
  margin-top: 50px;
  font-size: 0.95rem;
}