/* Smooth background & color transitions */
body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background: #f4f6f9;
  color: #000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  transition: background 0.5s ease, color 0.5s ease;
}

h1 {
  margin-bottom: 40px;
  color: #333;
  font-size: 36px;
  text-align: center;
}

/* Centered Google login button */
#login-btn {
  padding: 18px 36px;
  font-size: 20px;
  background: #4285f4;
  color: white;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: 0.2s;
  display: block;
  margin: 0 auto;
}
#login-btn:hover {
  background: #357ae8;
}

#task-controls {
  display: none;
  text-align: center;
  padding: 20px;
  width: 100%;
  max-width: 600px;
}

/* Dark mode toggle top-right */
#theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  background: #444;
  color: white;
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  font-size: 22px;
  cursor: pointer;
  transition: background 0.5s ease, transform 0.3s ease;
}
#theme-toggle:hover {
  transform: rotate(25deg);
}

/* Timer display */
#timer-display {
  font-weight: bold;
  font-size: 80px;
  margin-bottom: 40px;
  background: #fff;
  color: #000;
  padding: 30px 60px;
  border-radius: 16px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  display: inline-block;
  min-width: 260px;
  text-align: center;
  transition: background 0.5s ease, color 0.5s ease;
}

/* Task Buttons */
button {
  width: 100%;
  max-width: 300px;
  padding: 18px;
  margin: 12px auto;
  font-size: 22px;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: 0.3s;
  display: block;
}

#start-task {
  background: #4caf50;
  color: white;
}
#start-task:hover {
  background: #45a049;
}

#stop-task {
  background: #f44336;
  color: white;
}
#stop-task:hover {
  background: #e53935;
}

/* Feedback Box */
#status-message {
  margin-top: 20px;
  padding: 15px;
  border-radius: 10px;
  font-size: 18px;
  display: none;
  transition: background 0.5s ease, color 0.5s ease;
}
#status-message.success { background: #e8f5e9; color: #2e7d32; border: 1px solid #81c784; }
#status-message.error { background: #ffebee; color: #c62828; border: 1px solid #ef9a9a; }
#status-message.info { background: #e3f2fd; color: #1565c0; border: 1px solid #90caf9; }

/* Modal */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0; top: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.6);
  justify-content: center;
  align-items: center;
}
.modal-content {
  background: white;
  padding: 30px;
  border-radius: 12px;
  text-align: center;
  width: 400px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.3);
  transition: background 0.5s ease, color 0.5s ease;
}
.modal-content h2 { margin-bottom: 20px; font-size: 22px; }
.modal-content input {
  width: 95%;
  padding: 12px;
  font-size: 16px;
  margin-bottom: 20px;
  border-radius: 8px;
  border: 1px solid #ccc;
}
.modal-buttons { display: flex; justify-content: space-around; }

/* Dark Mode Styles */
body.dark-mode {
  background: #121212;
  color: #f4f4f4;
}
body.dark-mode #timer-display {
  background: #000;
  color: #fff;
}
body.dark-mode .modal-content {
  background: #222;
  color: #fff;
}
body.dark-mode #theme-toggle {
  background: #666;
  color: #fff;
}

body.dark.mode h1{
  background: #222;
  color: #fff;
}

/* Footer Styles */
#app-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  text-align: center;
  padding: 12px 0;
  font-size: 14px;
  letter-spacing: 0.5px;
  border-top: 2px solid;
  transition: background 0.5s ease, color 0.5s ease, border 0.5s ease;
}

/* Light mode footer */
body:not(.dark-mode) #app-footer {
  background: #fff;
  color: #333;
  border-color: #ddd;
}

/* Dark mode footer */
body.dark-mode #app-footer {
  background: #000;
  color: #ccc;
  border-color: #666;
}