/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}

/* Grey Theme */
:root {
  --bg: #1f1f1f;
  --surface: #2c2c2c;
  --light-grey: #aaa;
  --white: #fff;
  --accent: #888;
}

body {
  background-color: var(--bg);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  text-align: center;
}

/* Welcome Container */
.welcome-container {
  background: var(--surface);
  padding: 3rem 2rem;
  border-radius: 16px;
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.4);
  animation: fadeIn 1s ease;
}

/* Title */
.welcome-container h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.welcome-container h1 span {
  color: var(--light-grey);
}

/* Subtitle */
.welcome-container p {
  font-size: 1.1rem;
  color: var(--accent);
  margin-bottom: 2rem;
}

/* Button */
.start-btn {
  display: inline-block;
  padding: 10px 24px;
  background: var(--light-grey);
  color: var(--bg);
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.start-btn:hover {
  background: var(--white);
  color: var(--bg);
}

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

.fade-in {
  opacity: 0;
  animation: fadeIn 0.8s forwards;
}

.delay {
  animation-delay: 0.3s;
}

.delay-2 {
  animation-delay: 0.6s;
}