:root {
  /* 
   # Front-end Style Guide

## Layout

The designs were created to the following widths:

- Mobile: 375px
- Desktop: 1440px


  /*  Colors */
  /* # Primary */

  --color-Bright-Blue: hsl(220, 98%, 61%);
  /* - Check Background: linear-gradient hsl(192, 100%, 67%) to hsl(280, 87%, 65%) */
  --color-check-grad-1: hsl(192, 100%, 67%);
  --color-check-grad-2: hsl(280, 87%, 65%);

  /* # Neutral */
  /* ## Light Theme */

  --light-theme--Very-Light-Gray: hsl(0, 0%, 98%);
  --light-theme--Very-Light-Grayish-Blue: hsl(236, 33%, 92%);
  --light-theme--Light-Grayish-Blue: hsl(233, 11%, 84%);
  --light-theme--Dark-Grayish-Blue: hsl(236, 9%, 61%);
  --light-theme--Very-Dark-Grayish-Blue: hsl(235, 19%, 35%);

  /* ## Dark Theme */

  --dark-theme--Very-Dark-Blue: hsl(235, 21%, 11%);
  --dark-theme--Very-Dark-Desaturated-Blue: hsl(235, 24%, 19%);
  --dark-theme--Light-Grayish-Blue: hsl(234, 39%, 85%);
  --dark-theme--Light-Grayish-Blue-hover: hsl(236, 33%, 92%);
  --dark-theme--Dark-Grayish-Blue: hsl(234, 11%, 52%);
  --dark-theme--Very-Dark-Grayish-Blue-1: hsl(233, 14%, 35%);
  --dark-theme--Very-Dark-Grayish-Blue-2: hsl(237, 14%, 26%);

  /*  */
  --font-wt-light: 400;
  --fotn-wt-regular: 700;
}

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

html {
  font-size: 62.5%;
}

body {
  font-family: "Josefin Sans", sans-serif;
  font-optical-sizing: auto;
  font-style: normal;
  font-size: 1.8rem;

  height: 100vh;

  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-direction: column;

  /* dark */
  background: var(--dark-theme--Very-Dark-Blue);

  /* light   */
  /* background: var(--light-theme--Very-Light-Gray); */
}

/* ---------- HERO ---------- */
.hero__image {
  width: 100%;
  display: block;
}

/* ---------- LAYOUT ---------- */
.container {
  max-width: 540px;
  margin: -12rem auto 0;
  padding: 0 2rem;
}

/* ---------- TODO ---------- */
.todo__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.todo__title {
  letter-spacing: 0.4rem;
}

.todo__theme-btn {
  background: none;
  border: none;
  font-size: 2rem;
  cursor: pointer;
}

.todo__input-wrapper {
  margin-bottom: 2rem;
}

.todo__input {
  width: 100%;
  padding: 1.5rem;
  border-radius: 0.5rem;
  border: none;
  outline: none;
  background: var(--dark-card);
  color: inherit;
}

/* ---------- LIST ---------- */
.todo__list-wrapper {
  background: var(--dark-card);
  border-radius: 0.5rem;
  overflow: hidden;
}

.todo__list {
  list-style: none;
}

.todo__item {
  display: flex;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid hsl(235, 14%, 26%);
}

.todo__item.completed span {
  text-decoration: line-through;
  color: var(--dark-theme--Very-Dark-Grayish-Blue-1);
}

.todo__item input {
  margin-right: 1.5rem;
}

/* ---------- FOOTER ---------- */
.todo__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  font-size: 1.3rem;
  color: var(--dark-theme--Very-Dark-Grayish-Blue-1);
}

.todo__filters button,
.todo__clear {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
}

.todo__filters button:hover,
.todo__clear:hover {
  color: var(--dark-text);
}

.todo__hint {
  text-align: center;
  margin-top: 4rem;
  color: var(--dark-theme--Very-Dark-Grayish-Blue-1);
}

/* footer */
.attribution {
  font-size: 11px;
  text-align: center;
}
.attribution a {
  color: hsl(228, 45%, 44%);
}