:root {
  --bg: #0a0b0f;
  --bg-gradient: radial-gradient(circle at top, #121524, var(--bg));

  --card: rgba(255, 255, 255, 0.04);
  --card-hover: rgba(255, 255, 255, 0.06);

  --text: #f2f3f5;
  --muted: rgba(255, 255, 255, 0.65);

  --border: rgba(255, 255, 255, 0.10);
  --border-hover: rgba(255, 255, 255, 0.18);

  --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial;
}

body {
  background: var(--bg-gradient);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* HEADER */
header {
  padding: 90px 20px 45px;
  text-align: center;
}

header h1 {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.6px;
}

header p {
  color: var(--muted);
  margin-top: 10px;
  font-size: 14px;
}

/* CONTAINER */
.container {
  max-width: 920px;
  margin: auto;
  padding: 20px 20px 120px;
}

/* SECTIONS (GLASS CARDS PRO) */
section {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 16px;

  -webkit-backdrop-filter: blur(14px);
backdrop-filter: blur(14px);

  box-shadow: var(--shadow);

  transition: transform 0.25s ease, border 0.25s ease, background 0.25s ease;
}

section:hover {
  transform: translateY(-3px);
  border: 1px solid var(--border-hover);
  background: var(--card-hover);
}

section h2 {
  font-size: 15px;
  margin-bottom: 10px;
  color: #ffffff;
  font-weight: 600;
  letter-spacing: -0.2px;
}

section p {
  font-size: 14px;
  color: var(--muted);
  text-align: justify;
  line-height: 1.75;
  hyphens: auto;
}

/* FOOTER */
footer {
  text-align: center;
  padding: 45px 10px;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--border);
}

/* BOTÓN TOP (MODERNO) */
.top-btn {
  position: fixed;
  bottom: 22px;
  right: 22px;

  background: rgba(255, 255, 255, 0.9);
  color: black;
  border: none;

  padding: 10px 14px;
  border-radius: 12px;

  cursor: pointer;
  font-weight: 600;

  display: none;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.35);

  transition: transform 0.2s ease, opacity 0.2s ease;
}

.top-btn:hover {
  transform: scale(1.08);
}