/* Web7 Clock - Common Styles */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Fullscreen button */
.fullscreen-btn {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 100;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.6);
  width: 40px;
  height: 40px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  opacity: 0;
}

.fullscreen-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.9);
}

body:hover .fullscreen-btn {
  opacity: 1;
}

.fullscreen-btn svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* Back to top link */
.back-link {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 100;
  color: rgba(255, 255, 255, 0.4);
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 0.05em;
  transition: all 0.3s ease;
  opacity: 0;
}

.back-link:hover {
  color: rgba(255, 255, 255, 0.8);
}

body:hover .back-link {
  opacity: 1;
}

/* Clock container */
.clock-container {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  user-select: none;
  cursor: default;
}