/* Google Font */
@import url("https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap");

/* Color Palette */
:root {
  --lapis-lazuli: #22577a;
  --verdigris: #38a3a5;
  --emerald: #57cc99;
  --light-green: #80ed99;
  --tea-green: #c7f9cc;
}

/* Global reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  user-select: none; /* Prevent text selection */
}

body {
  font-family: "Roboto", sans-serif; /* Modern font */
  background: linear-gradient(to right, var(--lapis-lazuli), var(--light-green));
  color: var(--tea-green);
  text-align: center;
  padding: 20px;
  overflow-x: hidden; /* Prevent horizontal scroll */
}

button {
  -webkit-user-select: none; /* Prevent text selection on buttons */
  -moz-user-select: none; /* Prevent text selection on buttons */
  -ms-user-select: none; /* Prevent text selection on buttons */
  user-select: none; /* Prevent text selection on buttons */
}

button:active {
  outline: none; /* Remove the outline when the button is active */
}

/* Container for the birthday card */
.birthday-card {
  background: var(--tea-green);
  border: 5px solid var(--lapis-lazuli);
  border-radius: 20px;
  padding: 30px;
  max-width: 1100px;
  margin: 50px auto;
  text-align: center;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  position: relative;
  overflow: hidden;
}

/* Adding a festive header with sparkle effects */
.birthday-card h1 {
  font-size: 2.5rem;
  color: var(--light-green);
  text-shadow: 3px 3px var(--lapis-lazuli);
  margin-bottom: 10px;
  animation: shimmer 2s infinite;
}

.birthday-card h2 {
  font-size: 1.8rem;
  color: var(--emerald);
  text-shadow: 2px 2px var(--lapis-lazuli);
  margin-bottom: 20px;
}

.birthday-card p {
  font-size: 1.2rem;
  color: var(--verdigris);
  line-height: 1.6;
  margin-bottom: 30px;
}

/* Confetti background animation */
.birthday-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 200%;
  height: 200%;
  background-image: url("https://cdn-icons-png.flaticon.com/512/3567/3567070.png");
  background-repeat: repeat;
  background-size: 50px;
  opacity: 0.2;
  z-index: -1;
  animation: confetti-fall 5s infinite linear;
}

/* Buttons */
.birthday-card button {
  font-size: 1.2rem;
  padding: 10px 20px;
  margin: 10px;
  border: none;
  border-radius: 25px;
  cursor: pointer;
  transition: all 0.3s ease;
  color: #ffffff;
  background: var(--lapis-lazuli);
  box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.2);
}

.birthday-card button:hover {
  transform: scale(1.1);
  background: var(--verdigris);
}

/* Animations */
@keyframes shimmer {
  0% {
    text-shadow: 3px 3px var(--lapis-lazuli), -3px -3px var(--tea-green);
  }
  50% {
    text-shadow: 5px 5px var(--light-green), -5px -5px var(--lapis-lazuli);
  }
  100% {
    text-shadow: 3px 3px var(--lapis-lazuli), -3px -3px var(--tea-green);
  }
}

@keyframes confetti-fall {
  0% {
    transform: translateY(-100%) rotate(0deg);
  }
  100% {
    transform: translateY(100%) rotate(360deg);
  }
}

button {
  font-size: 1.2rem;
  padding: 10px 20px;
  margin: 10px;
  border: none;
  border-radius: 25px;
  cursor: pointer;
  transition: all 0.3s ease;
  color: #ffffff;
  background: var(--emerald);
  box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.2);
}

button:hover {
  transform: scale(1.1);
  background: var(--light-green);
}

#start {
  background: var(--verdigris);
}

#start:hover {
  background: var(--emerald);
}

canvas {
  margin: 20px auto;
  border: 5px solid var(--lapis-lazuli);
  border-radius: 15px;
  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.3);
  max-width: 100%; /* Prevent overflow */
  height: auto;
  display: block;
  background-color: white;
}

.hidden {
  display: none;
}

.footer {
  margin-top: 20px;
  margin: auto;
  border-top: 1px solid white;
  width: 80%;
  padding: 20px;
}

.footer a {
  text-decoration: none;
  color: white;
}

/* Mobile control buttons */
#mobile-controls {
  gap: 10px;
  z-index: 10;
}

#mobile-controls button {
  background-color: #57cc99;
  color: white;
  font-size: 16px;
  padding: 10px 20px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.2);
}

#mobile-controls button:hover {
  background-color: #38a3a5;
}

/* Show controls only on small screens */
@media (max-width: 768px) {
  #mobile-controls {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}