@import url('https://fonts.googleapis.com/css2?family=Poppins:200,300,400,500,600,700,800,900&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

/* 🌈 Background – subtle gradient with glow */
body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    animation: gradientShift 8s ease infinite;
    background-size: 400% 400%;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 🟦 Main box – glassmorphism + neon glow */
.box {
    position: relative;
    width: 450px;
    height: 550px;
    border-radius: 30px;
    background: rgba(40, 44, 52, 0.8);
    padding: 30px 50px;
    backdrop-filter: blur(10px);
    box-shadow: 
        0 0 25px rgba(0, 255, 255, 0.2),
        inset 0 0 15px rgba(255, 255, 255, 0.05),
        inset 0 0 30px rgba(0, 0, 0, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

h2 {
    color: #00fff5;
    width: 100%;
    font-size: 1.8em;
    font-weight: 700;
    text-align: center;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.6);
}

/* ✨ Input box – glowing inner shadow */
#inputBx {
    position: relative;
    width: 100%;
    border: none;
    outline: none;
    padding: 15px 20px;
    border-radius: 30px;
    font-size: 1em;
    color: #fff;
    background: rgba(0, 0, 0, 0.4);
    box-shadow:
        inset 2px 2px 10px rgba(0, 255, 255, 0.2),
        inset -2px -2px 10px rgba(0, 255, 255, 0.2),
        0 0 10px rgba(0, 255, 255, 0.2);
    transition: 0.3s;
}

#inputBx:focus {
    background: rgba(0, 255, 255, 0.1);
    box-shadow: 0 0 15px #00fff5;
}

/* 📝 To-do list container */
#list {
    position: relative;
    margin-top: 20px;
    max-height: 350px;
    overflow-y: hidden;
}

/* hide scrollbar */
#list::-webkit-scrollbar { display: none; }
#list { scrollbar-width: none; }

/* ✅ Each task item – neon gradient with smooth depth */
.box li {
    position: relative;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, #0077ff, #00e0ff);
    margin: 15px 0;
    padding: 10px 15px 10px 45px;
    min-height: 45px;
    cursor: pointer;
    border-radius: 22.5px;
    color: #fff;
    box-shadow:
        0 0 10px rgba(0, 255, 255, 0.4),
        inset 0 0 5px rgba(255, 255, 255, 0.2);
    overflow: hidden;
    transition: 0.2s ease;
}

.box li:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.6);
}

/* ❌ Delete button – glowing pink neon */
.box li i {
    position: absolute;
    right: 10px;
    width: 30px;
    height: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #ff006e;
    border-radius: 50%;
    box-shadow:
        0 0 8px rgba(255, 0, 110, 0.6),
        inset 0 0 5px rgba(255, 255, 255, 0.3);
    transition: 0.3s;
}

.box li i::before,
.box li i::after {
    content: '';
    position: absolute;
    width: 15px;
    height: 2px;
    background: #fff;
}

.box li i::before { transform: rotate(45deg); }
.box li i::after { transform: rotate(-45deg); }

.box li i:hover {
    transform: scale(1.15);
    background: #ff4f8a;
    box-shadow: 0 0 15px rgba(255, 0, 110, 0.9);
}

/* ⭕ Left check circle */
.box li::before {
    content: '';
    position: absolute;
    left: 8px;
    width: 30px;
    height: 30px;
    background: rgba(0, 0, 0, 0.4);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
}

/* ✅ Completed task style */
.box li.done {
    background: linear-gradient(135deg, #00c853, #00e676);
    box-shadow: 0 0 10px rgba(0, 255, 100, 0.6);
}

.box li.done::after {
    content: '';
    position: absolute;
    left: 16px;
    width: 12px;
    height: 6px;
    border-left: 2px solid #fff;
    border-bottom: 2px solid #fff;
    transform: rotate(315deg);
}