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

body {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: "Segoe UI", sans-serif;
    background: radial-gradient(circle at top left, #7f00ff, #0d4ab5, #00c6ff);
    background-size: 300% 300%;
    animation: radialGradientAnimation 15s ease infinite;
    padding: 1.5rem;
}

@keyframes radialGradientAnimation {
    0% {
        background-position: 0% 0%;
    }

    50% {
        background-position: 100% 100%;
    }

    100% {
        background-position: 0% 0%;
    }
}

@media (max-width : 500px) {
    body {
        overflow-y: hidden;
    }
}

/* =====================
   Main Todo Card
===================== */
.todo-container {
    width: 500px;
    max-width: 100%;
    padding: 1.5rem;
    border-radius: 20px;
    background-image: radial-gradient(#ffffff0f);
    backdrop-filter: blur(14px);
    border: 2px solid #fff;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.5);
    color: white;
    transition: 0.3s ease;
}

.todo-container:hover {
    transform: translateY(-3px);
}

/* Title */
.todo-container h2 {
    text-align: center;
    margin-bottom: 1.2rem;
    font-size: 2rem;
    letter-spacing: 2px;
}

/* =====================
   Input Section
===================== */
.input-container {
    display: flex;
    gap: 0.6rem;
    margin-bottom: 1.2rem;
}

.input-container input {
    flex: 1;
    padding: 0.8rem 1rem;
    border-radius: 8px;
    text-align: center;
    border: none;
    outline: none;
    font-size: 1.5rem;
    background: rgba(255, 255, 255, 0.15);
    color: white;
    transition: 0.34s;
}

.input-container input::placeholder {
    color: #ddd;
    font-size: 1.2rem;
}

.input-container input:focus {
    background: rgba(255, 255, 255, 0.25);
    border: 2px solid rgb(6, 107, 161);
}

.input-container button {
    padding: 0.8rem 1.2rem;
    font-size: 1.2rem;
    border-radius: 8px;
    border: none;
    background: linear-gradient(#057ae1, #00f2fe);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: 0.25s;
}

.input-container button:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.input-container button:active {
    transform: scale(0.95);
}

/* =====================
   List Items
===================== */
.list-container {
    list-style-position: inside;
    max-height: 300px;
    overflow-y: auto;
    padding-right: 5px;
}

.list-container li {
    margin-bottom: 0.8rem;
    padding: 1rem;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.114);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.3rem;
    transition: 0.25s;
    cursor: pointer;
}

.list-container li:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Icons */
.list-container li i {
    cursor: pointer;
    font-size: 1.3rem;
    transition: 0.2s;
}

.list-container li i:hover {
    transform: scale(1.2);
    color: #ff6b6b;
}

/* Completed Task */
.list-check {
    background: #00c853 !important;
}

/* =====================
   Edit Mode
===================== */
.input-edit {
    display: none;
    text-align: center;
}

.input-edit-show {
    display: block;
}

.input-edit input {
    padding: 0.4rem;
    text-align: center;
    font-size: 1.2rem;
    border-radius: 6px;
    border: none;
    outline: none;
    width: 60%;
}

.input-edit i {
    color: #00e676;
    font-size: 1rem;
    margin-left: 6px;
}


/* =====================
   Responsive Design
===================== */
@media (max-width: 600px) {
    .todo-container {
        padding: 1.2rem;
        border-radius: 14px;
    }

    .todo-container h2 {
        font-size: 1.6rem;
    }

    .input-container {
        flex-direction: column;
    }

    .input-container button {
        width: 100%;
    }

    .list-container li {
        font-size: 1rem;
    }
}