:root {
  --bg: #f4f4f4;
  --text: #333;
  --accent: #3498db;
  --card-bg: #ffffff;
  --shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  --radius: 10px;
  --font: Arial, sans-serif;
  --button-bg: var(--accent);
  --button-text: #ffffff;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
}

.container {
  text-align: center;
  background: var(--card-bg);
  padding: 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  max-width: 560px;
  width: 92%;
}

.button-container { display: none; margin-top: 22px; }
.button {
  padding: 12px 22px;
  font-size: 16px;
  background-color: var(--button-bg);
  color: var(--button-text);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.08s ease, filter 0.2s ease;
}
.button:hover { filter: brightness(1.05); }
.button:active { transform: translateY(1px); }
.message { margin-top: 12px; font-size: 14px; color: var(--text); }
.container h1 { margin: 0 0 8px; font-size: 24px; }
.container p { margin: 0 0 16px; font-size: 15px; }
.loaders { display: flex; justify-content: center; align-items: center; min-height: 64px; }
.loaders > * { display: none; }
.loader-spinner {
  width: 56px; height: 56px;
  border: 6px solid rgba(0,0,0,0.08);
  border-top: 6px solid var(--accent);
  border-radius: 50%;
  animation: spin 1s ease-in-out infinite;
}
.loader-bar { width: 68%; max-width: 360px; height: 10px; background: rgba(0,0,0,0.1); border-radius: 999px; overflow: hidden; box-shadow: inset 0 0 4px rgba(0,0,0,0.12); }
.loader-bar .bar { display: block; width: 30%; height: 100%; background: linear-gradient(90deg, transparent, var(--accent), transparent); animation: slide 1.2s ease-in-out infinite; border-radius: 999px; }
.loader-dots { gap: 8px; }
.loader-dots span { width: 10px; height: 10px; background: var(--accent); border-radius: 50%; display: inline-block; animation: bounce 0.9s ease-in-out infinite; }
.loader-dots span:nth-child(2) { animation-delay: 0.15s; }
.loader-dots span:nth-child(3) { animation-delay: 0.3s; }
.loader-pulse {
  width: 14px; height: 14px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(0,0,0,0.25);
  animation: pulse 1.2s ease-in-out infinite;
}

@keyframes pulse {
  0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(0,0,0,0.25); }
  70% { transform: scale(1.15); box-shadow: 0 0 0 16px rgba(0,0,0,0); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(0,0,0,0); }
}

@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
@keyframes slide { 0% { transform: translateX(-100%); } 100% { transform: translateX(200%); } }
@keyframes bounce { 0%, 80%, 100% { transform: translateY(0); opacity: 0.6; } 40% { transform: translateY(-8px); opacity: 1; } }