:root {
    --background-colour: #2e3146;
    --text-colour: #fff;
    --primary-colour: #02ee5dee;
    --primary-hover-colour: #108d40ee;
    --accent-colour: #3e436b;
    --secondary-colour: #2b2e3f;
    --border-colour: #242635;
    --secondary-text-colour: #555;
}

* {
    padding: 0;
    margin: 0;
}


::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--secondary-colour);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-colour);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-colour);
}

html {
    font-size: 16px;
    font-family: "JetBrains Mono", monospace;
    color: var(--text-colour);
}

body {
    padding: 10px;
    min-height: 100%;
    background-color: var(--background-colour);
    display: flex;
    flex-direction: column;
    align-items: center;
}

h1 {
    margin-top: 100px;
    margin-bottom: 30px;
    font-size: 5rem;
    color: var(--primary-colour);
}

form {
    width: clamp(10vw, 50vw, 500px);
    position: relative;
    margin-bottom: 30px;
}

#todo-input {
    box-sizing: border-box;
    background-color: var(--secondary-colour);
    border: 2px solid var(--border-colour);
    border-radius: 1000px;
    padding: 0.5rem;
    width: 100%;
    color: var(--text-colour);
    caret-color: var(--primary-colour);
    font-size: inherit;
    font-family: "JetBrains Mono", monospace;
}

#todo-input:focus {
    outline: none;
}

input[type="submit"] {
    background-color: var(--primary-colour);
    border-radius: 1000px;
    padding: 0.5rem 1rem;
    border: none;
    color: var(--background-colour);
    position: absolute;
    top: 0;
    right: 0;
    height: 100%;
    cursor: pointer;
    font-weight: 700;
    transition: 200ms ease;
}

input[type="submit"]:hover {
    background-color: var(--primary-hover-colour);
    color: var(--text-colour);
}

#todo-list {
    list-style: none;
    width: clamp(10vw, 50vw, 500px);
}

#todo-list li:last-child {
    margin-bottom: 0;
}

.todo {
    display: flex;
    flex-direction: row;
    justify-content: center;
    background-color: var(--secondary-colour);
    border: 2px solid var(--border-colour);
    border-radius: 1000px;
    width: 100%;
    margin-bottom: 10px;
}

.todo-text {
    font-size: inherit;
    padding: .5rem;
    flex-grow: 1;
    transition: 200ms ease;
    cursor: pointer;
    overflow: scroll;
    text-wrap: nowrap;
}

.todo-text::before {
  content: "";
  position: absolute;
  display: block;
  width: 100%;
  height: 2px;
  bottom: 0;
  left: 0;
  background-color: #000;
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.todo-text:hover::before {
  transform: scaleX(1);
}

.todo-text::-webkit-scrollbar {
    display: none;
}

div.custom-checkbox {
    min-height: 100%;
    aspect-ratio: 1 / 1;
    margin-right: 1rem;
}

label.custom-checkbox {
    background-color: var(--secondary-colour);
    border-radius: 50%;
    border: 2px solid var(--primary-colour);
    min-height: 100%;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: 100ms ease;
    cursor: pointer;
}

input[type="checkbox"] {
    display: none;
}

input[type="checkbox"]:checked~div.custom-checkbox label.custom-checkbox {
    background-color: var(--primary-colour);
}

input[type="checkbox"]:checked~.todo-text {
    text-decoration: line-through;
    color: var(--secondary-text-colour);
}

.delete-button {
    background-color: transparent;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    margin-right: .5rem;
}

.delete-button svg {
    transition: 200ms ease;
}

.delete-button:hover svg {
    fill: #f00;
}

.import-export {
    margin: 15px;
    display: flex;
    flex-direction: row;
}

#export,
#import-label {
    transition: 200ms ease;
    background-color: var(--primary-colour);
    color: var(--background-colour);
    display: block;
    text-decoration: none;
    border-radius: 1000px;
    padding: .5rem 1rem;
    font-weight: 500;
    margin: 15px;
    cursor: pointer;
}

#export:hover,
#import-label:hover {
    background-color: var(--primary-hover-colour);
    color: var(--text-colour);
}

#import {
    display: none;
}