/* ===== Reset default styles ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ===== Page Background ===== */
body {
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(-45deg, #ff9a9e, #fad0c4, #a1c4fd, #c2e9fb);
  background-size: 400% 400%;
  animation: gradientBG 12s ease infinite;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding-top: 50px;
  position: relative;
  overflow: hidden; /* keep shapes inside */
}

/* Gradient animation */
@keyframes gradientBG {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Floating glowing shapes */
body::before,
body::after {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  animation: floatShape 20s linear infinite, glowColor 8s ease-in-out infinite;
  z-index: 0; /* behind container */
  box-shadow: 0 0 40px rgba(255, 255, 255, 0.2);
}

body::before {
  top: -100px;
  left: -100px;
}

body::after {
  bottom: -100px;
  right: -100px;
  animation-delay: 10s, 4s; /* offset both animations */
}

/* Floating movement */
@keyframes floatShape {
  0% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(40px) rotate(180deg); }
  100% { transform: translateY(0) rotate(360deg); }
}

/* Glowing & color change */
@keyframes glowColor {
  0% {
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 40px rgba(255, 200, 200, 0.4);
  }
  25% {
    background: rgba(255, 192, 203, 0.12);
    box-shadow: 0 0 50px rgba(255, 150, 200, 0.5);
  }
  50% {
    background: rgba(173, 216, 230, 0.12);
    box-shadow: 0 0 60px rgba(150, 200, 255, 0.5);
  }
  75% {
    background: rgba(255, 255, 224, 0.12);
    box-shadow: 0 0 50px rgba(255, 255, 150, 0.5);
  }
  100% {
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 40px rgba(255, 200, 200, 0.4);
  }
}


/* Floating animation */
@keyframes floatShape {
  0% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(40px) rotate(180deg); }
  100% { transform: translateY(0) rotate(360deg); }
}

/* Keep the container above shapes */
.container {
  position: relative;
  z-index: 1;
}



/* ===== Main Container ===== */
.container {
  background: rgba(255, 255, 255, 0.15);
  padding: 20px 30px;
  border-radius: 15px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
  width: 350px;
  text-align: center;
}

/* ===== Heading ===== */
h1 {
  color: #fff;
  margin-bottom: 20px;
  font-weight: 600;
}

/* ===== Input Section ===== */
input {
  padding: 12px;
  width: 70%;
  border: none;
  outline: none;
  border-radius: 8px;
  font-size: 14px;
  background: rgba(255, 255, 255, 0.8);
}

button {
  padding: 12px 15px;
  border: none;
  outline: none;
  border-radius: 8px;
  background: #ff7f50;
  color: white;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
}

button:hover {
  background: #e5673d;
  transform: translateY(-2px);
}

/* ===== Task List ===== */
ul {
  list-style: none;
  margin-top: 20px;
  max-height: 300px;
  overflow-y: auto;
}

li {
  background: rgba(255, 255, 255, 0.9);
  padding: 10px 12px;
  margin-bottom: 10px;
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 500;
  animation: slideIn 0.3s ease;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

li .delete {
  background: #ff4d4d;
  border: none;
  padding: 6px 10px;
  border-radius: 5px;
  color: white;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
}

li .delete:hover {
  background: #d93636;
  transform: scale(1.05);
}

/* ===== Scrollbar Styling ===== */
ul::-webkit-scrollbar {
  width: 6px;
}
ul::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.5);
  border-radius: 10px;
}

/* ===== Animations ===== */
@keyframes slideIn {
  from {
    transform: translateY(-5px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* ===== Responsive Design ===== */

/* For tablets (screen ≤ 768px) */
@media screen and (max-width: 768px) {
  .container {
    width: 80%;
    padding: 15px 20px;
  }

  input {
    width: 65%;
    font-size: 13px;
  }

  button {
    padding: 10px 12px;
    font-size: 13px;
  }
}

/* For small phones (screen ≤ 480px) */
@media screen and (max-width: 480px) {
  body {
    padding-top: 20px;
  }

  .container {
    width: 90%;
    padding: 15px;
  }

  input {
    width: 100%;
    margin-bottom: 10px;
  }

  button {
    width: 100%;
  }

  li {
    font-size: 14px;
  }

  li .delete {
    font-size: 11px;
    padding: 5px 8px;
  }
}