:root {
  --grey: #e8e8e8;
  --black: #111;
  --white: #fdfcfc;
  --red: #ff3b00;
  --green: #3f9b74;
  --yellow: #f9a03e;
  --blue: rgb(0, 82, 138);
  --text-shadow-color: #5d1600;
  --text-shadow: 1px 1px var(--text-shadow-color),
    -1px -1px var(--text-shadow-color), 0 1px var(--text-shadow-color),
    1px 0 var(--text-shadow-color), 0 -1px var(--text-shadow-color),
    -1px 0 var(--text-shadow-color);
}

html {
  font-family: "Roboto", "Hiragino Kaku Gothic ProN", "ヒラギノ角ゴ ProN W3",
    Arial, "nc3Jp", sans-serif;
  font-size: 15px;
  background: var(--white);
  color: var(--black);
  position: relative;
  z-index: 1;
  &::before {
    content: "";
    background: url(/assets/bg.webp) repeat center / 4rem 4rem;
    width: 100vw;
    height: 100svh;
    position: fixed;
    inset: 0;
    opacity: 0.1;
    z-index: -1;
  }
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100svh;
  &:before,
  &::after {
    content: "";
    width: 100%;
    position: absolute;
    left: 0;
    z-index: 20;
  }
  &:before {
    height: 11vw;
    background: linear-gradient(
        90deg,
        var(--black) 0%,
        var(--black) calc(100% / 3),
        var(--green) calc(100% / 3),
        var(--green) calc(100% * 2 / 3),
        var(--red) calc(100% * 2 / 3),
        var(--red) 100%
      )
      repeat center / calc(100% / 6);
    top: -1vw;
    border-bottom: 2px solid var(--black);
    box-shadow: 0 0.2rem 0.4rem rgb(0 0 0 / 0.4);
  }
  &:after {
    height: 8vw;
    background: url(/assets/icon/lamp.svg) repeat center / contain;
    top: -1vw;
    filter: drop-shadow(0 0.1rem 0.2rem rgb(0 0 0 / 0.8));
  }
}

main {
  flex: 1;
  position: relative;
  display: flex;
  flex-direction: column;

  > article {
    padding-bottom: 4rem;
    flex: 1;
  }
}

h1,
h2,
h3,
p,
li,
a,
span,
button,
pre,
dt,
dd {
  word-wrap: break-word;
  word-break: break-all;
}

h1,
h2,
h3 {
  font-weight: bold;
  margin-bottom: 2rem;
  scroll-margin-top: 4rem;
}

h1 {
  font-size: 1.5rem;
}

h2 {
  position: relative;
  z-index: 1;
  font-size: 1.25rem;
  padding: 0.25rem 2.5rem 0.25rem 6vw;
  background: url(/assets/icon/maki-r.webp) no-repeat right / contain;
  filter: drop-shadow(0.1rem 0.1rem rgb(0 0 0 / 0.4));

  &::before,
  &::after {
    content: "";
    position: absolute;
    top: 50%;
    translate: 0 -50%;
  }
  &::before {
    left: 0;
    background: url(/assets/icon/maki-c.webp) no-repeat 0.25rem / 100% 100%;
    width: 95%;
    height: 100%;
    z-index: -1;
  }
  &::after {
    left: 0;
    width: 1rem;
    height: 125%;
    background: url(/assets/icon/maki-l.webp) no-repeat left / contain;
    filter: drop-shadow(0.2rem 0 0.1rem rgb(0 0 0 / 0.4));
  }
}

h3 {
  font-size: 1.125rem;
}

a,
button {
  cursor: pointer;
}

a {
  transition: opacity 0.2s;
  &:hover {
    opacity: 0.8;
  }
}

button {
  transition: filter 0.2s;
  &:hover {
    filter: brightness(1.25);
  }
}

img {
  height: auto;
}

pre {
  margin: 0;
}

.container {
  max-width: 744px;
  margin-inline: auto;
  width: 100%;
}

.link {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 1.25rem;
  border: 1px solid var(--black);
  border-radius: 50vh;
  text-decoration: underline;
}

.button {
  position: relative;
  display: table;
  padding: 0.75rem 3.5rem 0.75rem 2rem;
  background: linear-gradient(
    0deg,
    rgba(255, 119, 65, 1) 0%,
    var(--red) 50%,
    rgba(255, 95, 63, 1) 50%,
    rgb(255, 132, 91) 100%
  );
  color: var(--white);
  font-size: 1.25rem;
  font-weight: bold;
  margin-inline: auto;
  border: 1px solid var(--black);
  border-top: none;
  border-radius: 50vh;
  box-shadow:
    0 0.1rem 0.1rem rgb(0 0 0 / 0.4),
    0 0.4rem 1rem -0.5rem var(--black),
    0px -1px 0px rgba(0, 0, 0, 0.3);
  text-shadow: var(--text-shadow);
  &::before {
    content: "";
    width: 80%;
    height: 0.2rem;
    position: absolute;
    top: 0;
    border-radius: 50vh;
    left: 50%;
    background: white;
    translate: -50% 0;
    filter: blur(2px);
  }
  &::after {
    content: "";
    background: url(/assets/icon/arrow.svg) no-repeat center / contain;
    width: 2rem;
    height: 1lh;
    position: absolute;
    top: 50%;
    right: 1rem;
    translate: 0 -50%;
    filter: drop-shadow(1px 1px 0 rgb(0 0 0 / 0.8));
  }

  transition-property: translate, filter, box-shadow, opacity;
  transition-duration: 0.2s;
  &:hover {
    translate: 0 -0.125rem;
    filter: brightness(1.25);
  }
  &:active {
    translate: 0 0.125rem;
    box-shadow: none;
  }
  &.disabled {
    pointer-events: none;
    opacity: 0.6;
    cursor: default;
    box-shadow: none;
  }
}

.input_text {
  background: var(--white);
  border: 1px solid #999;
  padding: 0.5rem;
  width: 100%;
  border-radius: 0.25rem;
}

.turbolinks-progress-bar {
  background-color: var(--red);
}

@media (min-width: 744px) {
  html {
    background: #eee;
    &::before {
      opacity: 0.2;
    }
  }

  body {
    &::before,
    &::after {
      position: absolute;
      top: 0;
    }

    &::before {
      height: 3rem;
    }
    &::after {
      height: 3rem;
      top: -0.5rem;
    }
  }

  main {
    background: var(--white);
    border: 1px solid var(--black);
    box-shadow: 0 0 0.2rem rgb(0 0 0 / 0.4);
  }

  h2 {
    padding-left: 1.75rem;
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: 1024px;
  }
}