:root {
  /* Primary */

  --bright-blue: hsl(220, 98%, 61%);
  --check-background: linear-gradient(hsl(192, 100%, 67%), hsl(280, 87%, 65%));

  /* Neutral */

  /* Light Theme */

  --very-light-gray: hsl(0, 0%, 98%);
  --very-light-grayish-blue: hsl(236, 33%, 92%);
  --light-grayish-blue: hsl(233, 11%, 84%);
  --dark-grayish-blue: hsl(236, 9%, 61%);
  --very-dark-grayish-blue: hsl(235, 19%, 35%);

  /* Dark Theme */

  --very-dark-blue: hsl(235, 21%, 11%);
  --very-dark-desaturated-blue: hsl(235, 24%, 19%);
  --light-grayish-blue-dark: hsl(234, 39%, 85%);
  --light-grayish-blue-hover: hsl(236, 33%, 92%);
  --dark-grayish-blue-dark: hsl(234, 11%, 52%);
  --very-dark-grayish-blue-dark: hsl(233, 14%, 35%);
  --very-dark-grayish-blue-hover: hsl(237, 14%, 26%);

  /* variables for elements */
  --bg-color: var(--very-dark-blue);
  --task-bg-color: var(--very-dark-desaturated-blue);
  --task-input-color: var(--very-light-grayish-blue);
}
*,
*::after,
*::after {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

body {
  font-size: 18px;
  min-height: 100svh;
  font-family: "Josefin Sans", sans-serif;
  background-color: var(--bg-color);
  position: relative;
}
img {
  max-width: 100%;
}
input[type="checkbox"],
input[type="radio"] {
  display: none;
}
/* background */
.background {
  width: 100%;
  height: 200px;
  position: absolute;
  left: 0;
  top: 0;
  z-index: -1;
  background-image: url("../../images/bg-mobile-dark.jpg");
}
.container {
  margin: 0 auto;
  position: relative;
  width: 100%;
  height: 85svh;
  padding: 2.5rem 1.1rem 0;
  header {
    display: flex;
    justify-content: space-between;
    font-weight: lighter;
    color: white;
    .theme {
      width: 20px;
    }
  }
  .container-content {
    width: 95%;
    height: 90%;
    margin: 1rem auto 0;
    .input {
      margin-bottom: 1rem;
      & .task {
        border-radius: 0.5rem;
        input {
          color: white;
        }
        .check {
          button {
            position: absolute;
            width: 100%;
            height: 100%;
            left: 0;
            top: 0;
            opacity: 0;
          }
        }
      }
    }
    .tasks {
      background-color: var(--task-bg-color);
      border-radius: 0.5rem;
      padding: 0.2rem 0.1rem;
      .tasks_container {
        max-height: 60svh;
        overflow: scroll;
      }
      .tasks_info {
        display: flex;
        justify-content: space-between;
        align-items: center;
        color: var(--very-dark-grayish-blue-dark);
        padding: 1rem;
        font-size: 0.9rem;
        .clearCompleted {
          cursor: pointer;
        }
      }
    }
    .task {
      display: flex;
      align-items: center;
      background-color: var(--task-bg-color);
      padding: 0.7rem;
      position: relative;

      .check {
        padding: 10px;
        width: 25px;
        height: 25px;
        border-radius: 50%;
        border: 1px solid var(--very-dark-grayish-blue);
        position: relative;

        svg {
          position: absolute;
          left: 7px;
          top: 8px;
          opacity: 0;
        }
      }
      hr {
        position: absolute;
        border: 0;
        bottom: 0;
        left: 0;
        height: 1px;
        width: 100%;
        background-color: var(--very-dark-grayish-blue);
      }
      &.completed {
        input {
          color: var(very-light-grayish-blue);
        }
      }
      .task_text {
        border: none;
        background-color: transparent;
        padding: 0.5rem;
        color: var(--task-input-color);
        flex: 1;
        &:focus {
          outline: none;
        }
      }
    }
    .task.completed {
      .check {
        background: var(--check-background);
        svg {
          opacity: 1;
        }
      }
      .task_text {
        color: var(--very-dark-grayish-blue-dark);
        text-decoration: line-through;
      }
    }
    .filters {
      margin-top: 1rem;
      border-radius: 0.5rem;
      color: var(--very-dark-grayish-blue-dark);
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 1rem;
      background-color: var(--task-bg-color);
      padding: 1rem;
      label:has(input[type="radio"]:checked) span {
        color: var(--bright-blue);
      }
    }
  }
}
footer {
  position: absolute;
  width: 100%;
  bottom: 5px;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--very-dark-grayish-blue-dark);
}
@media (min-width: 768px) {
  .container {
    max-width: 40%;
  }
  .background {
    background-image: url("../../images/bg-desktop-dark.jpg");
    height: 300px;
  }
}