:root {
  --bg: #ffffff;
  --fg: #222222;
  --accent: #0f0f0f;
  --accent-dark: #e1e9e3;
  --tweet: #1da1f2;
  --tweet-dark: #0d95e8;
  --radius: 8px;
  --font: 'Segoe UI', sans-serif;
}

/* Reset y box-sizing */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Altura completa + espacio para footer */
html, body {
  height: 100%;
}
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center; /* US #11 */
  padding: 1rem;
  padding-bottom: 160px; /* deja espacio para el footer */
  transition: background-color 1s ease;
}

/* Quote Box */
#quote-box {
  background: #fff;
  border-radius: var(--radius);
  padding: 2rem;
  max-width: 480px;
  width: 100%;
  text-align: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Texto y autor */
#text {
  font-size: 1.4rem;
  margin-bottom: 1rem;
}
#author {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  font-style: italic;
  color: #555;
}

/* Botones y enlace Tweet */
.actions {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
}
.actions button,
.actions a {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  color: #fff;
  transition: background 0.3s, transform 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.actions button {
  background: var(--accent);
}
.actions button:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
}
.actions a {
  background: var(--tweet);
}
.actions a:hover {
  background: var(--tweet-dark);
  transform: translateY(-2px);
}

/* Footer fijo */
.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(0, 0, 0, 0.03);
  padding: 1rem 0;
  z-index: 1000;
}
.footer-container {
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}
.footer-brand p {
  margin: 0;
  color: #444;
  font-size: 0.9rem;
}
.footer-links {
  list-style: none;
  display: flex;
  gap: 1.25rem;
  padding: 0;
  margin: 0;
}
.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--accent);        
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s, transform 0.2s;
}
.footer-links a:hover {
  color: var(--accent-dark);
  transform: translateY(-2px);
}
.footer-links i {
  font-size: 1rem;
}

/* Responsive móvil */
@media (max-width: 480px) {
  body {
    padding-bottom: 240px;
  }
  .actions {
    flex-direction: column;
  }
  .actions button,
  .actions a {
    width: 100%;
  }
  .footer-links {
    flex-direction: column;
    gap: 0.4rem;
  }
}