* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  background: radial-gradient(1200px 800px at top, #1c2333, #0b0f1a);
  color: #e6e9f0;
  min-height: 100vh;
  padding: 40px 20px;
}

.container {
  max-width: 800px;
  margin: auto;
  background: rgba(18, 23, 38, 0.85);
  border-radius: 16px;
  padding: 40px 32px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
}

h1, h2 {
  margin-top: 0;
}

p {
  color: #b8c0e0;
  line-height: 1.6;
}

button, .btn {
  background: linear-gradient(135deg, #3b82f6, #06b6d4);
  border: none;
  border-radius: 999px;
  padding: 14px 28px;
  margin: 10px;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

button:hover,
.btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.1);
  box-shadow: 0 12px 30px rgba(6, 182, 212, 0.5);
}


.progress {
  width: 100%;
  height: 10px;
  background: rgba(255,255,255,0.1);
  border-radius: 999px;
  overflow: hidden;
  margin: 20px 0;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #22c55e, #06b6d4);
  transition: width 0.4s ease;
}

footer {
  margin-top: 140px;
  font-size: 0.9rem;
  color: #7f88a9;
}

footer .notice {
  margin-bottom: 0;
}

footer .author {
  margin-top: 16px;
  font-size: 0.9rem;
  color: #b8c0e0;
}

footer .author a {
  color: #9ab8ff;
  text-decoration: none;
}

footer .author a:hover {
  text-decoration: underline;
}

footer a {
  color: #9ab8ff;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}