/* fonts */

@font-face {
  font-family: 'D2Coding';
  src: url('/assets/fonts/D2Coding-Ver1.3.2-20180524.ttf') format('truetype');
  font-weight: normal;
  font-display: swap;
}

@font-face {
  font-family: 'SuseongBatang';
  src: url('/assets/fonts/SuseongBatang.woff');
  font-weight: normal;
  font-display: swap;
}

/* color palette */

:root {
  color-scheme: light dark;
  --light-mode-background-color: #fafafa;
  --light-mode-font-color: #2d3748;
  --light-mode-font-color-secondary: #718096;
  --light-mode-box-shadow-color: rgba(0, 0, 0, 0.08);
  --light-mode-highlight-color: rgba(66, 153, 225, 0.1);
  --light-mode-accent-color: #4a6fa5;
  --light-mode-border-color: #e2e8f0;

  --dark-mode-background-color: #1a202c;
  --dark-mode-font-color: #e2e8f0;
  --dark-mode-font-color-secondary: #a0aec0;
  --dark-mode-box-shadow-color: rgba(0, 0, 0, 0.3);
  --dark-mode-highlight-color: rgba(66, 153, 225, 0.2);
  --dark-mode-accent-color: #90cdf4;
  --dark-mode-border-color: #4a5568;
}

/* defaults */

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

html {
  font-size: 16px;
}

body {
  font-family: 'SuseongBatang', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 1rem;
  line-height: 1.8;
  color: light-dark(var(--light-mode-font-color), var(--dark-mode-font-color));
  background-color: light-dark(var(--light-mode-background-color), var(--dark-mode-background-color));
}

a {
  color: light-dark(var(--light-mode-accent-color), var(--dark-mode-accent-color));
  text-decoration: none;
  transition: opacity 0.2s ease;
}

a:hover {
  opacity: 0.8;
}

code {
  font-family: 'D2Coding', monospace;
  font-size: 0.9em;
  background-color: light-dark(#edf2f7, #2d3748);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  color: light-dark(var(--light-mode-font-color), var(--dark-mode-font-color));
}

pre {
  background-color: light-dark(#edf2f7, #2d3748);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  color: light-dark(var(--light-mode-font-color), var(--dark-mode-font-color));
}

pre code {
  background: none;
  padding: 0;
}

/* typography */

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.4;
  margin: 1.5rem 0 1rem;
  color: light-dark(var(--light-mode-font-color), var(--dark-mode-font-color));
}

h1 {
  font-size: 1.875rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid light-dark(var(--light-mode-border-color), var(--dark-mode-border-color));
}

h2 {
  font-size: 1.5rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid light-dark(var(--light-mode-border-color), var(--dark-mode-border-color));
}

h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p {
  margin: 1rem 0;
}

blockquote {
  background-color: light-dark(rgba(66, 153, 225, 0.05), rgba(66, 153, 225, 0.1));
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  border-left: 4px solid light-dark(var(--light-mode-accent-color), var(--dark-mode-accent-color));
  border-radius: 0 8px 8px 0;
  color: light-dark(var(--light-mode-font-color), var(--dark-mode-font-color));
}

li {
  list-style-position: inside;
  margin: 0.5rem 0;
}

hr {
  margin: 3rem 0;
  border: 0;
  border-top: 1px solid light-dark(var(--light-mode-border-color), var(--dark-mode-border-color));
}

/* navigation */

nav {
  a {
    text-decoration: none;
    color: light-dark(var(--light-mode-font-color), var(--dark-mode-font-color));
    transition: color 0.2s ease;
  }

  a:hover {
    color: light-dark(var(--light-mode-accent-color), var(--dark-mode-accent-color));
    opacity: 1;
  }

  #nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
  }

  #nav-logo:hover {
    opacity: 1;
  }

  img#gh-avatar {
    border-radius: 50%;
    transition: transform 0.2s ease;
    border: 2px solid light-dark(var(--light-mode-border-color), var(--dark-mode-border-color));
  }

  #nav-logo:hover img#gh-avatar {
    transform: scale(1.05);
    border-color: light-dark(var(--light-mode-accent-color), var(--dark-mode-accent-color));
  }

  #site-title {
    font-weight: 600;
    font-size: 1.1rem;
  }

  ul#menus {
    list-style: none;
    display: flex;

    li {
      list-style: none;
      margin: 0;
      transition: background-color 0.2s ease;

      a {
        display: block;
        padding: 0.5rem 1rem;
      }
    }

    li:hover {
      background-color: light-dark(var(--light-mode-highlight-color), var(--dark-mode-highlight-color));
    }
  }
}

/* main content */

main {
  header {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.75rem;
    min-height: 12vh;
    text-align: center;
    padding: 1rem 0;

    h1 {
      border-bottom: none;
      margin: 0;
    }

    ul {
      display: flex;
      gap: 0.75rem;
      flex-wrap: wrap;
      justify-content: center;

      li {
        list-style: none;
        margin: 0;

        a {
          text-decoration: none;
          color: light-dark(var(--light-mode-accent-color), var(--dark-mode-accent-color));
          font-size: 0.9rem;
        }
      }

      li:hover {
        cursor: pointer;
        background: none;
      }
    }
  }

  article, section {
    max-width: 900px;
    margin: 0 auto;
  }

  figure#article-body-wrapper {
    * {
      margin-bottom: 1rem;
    }

    blockquote {
      margin: 1.5rem 0;
    }
  }

  /* tags page */
  div#tags-wrapper {
    ul {
      max-width: 100%;
      padding: 2rem;
      display: flex;
      gap: 0.75rem;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
      list-style: none;
    }

    li {
      list-style: none;
      margin: 0;

      a {
        display: block;
        transition: transform 0.2s ease;
      }

      a:hover {
        transform: translateY(-2px);
        opacity: 1;
      }

      code {
        display: block;
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
        border: 1px solid light-dark(var(--light-mode-border-color), var(--dark-mode-border-color));
        transition: all 0.2s ease;
      }

      a:hover code {
        background-color: light-dark(var(--light-mode-accent-color), var(--dark-mode-accent-color));
        color: white;
        border-color: light-dark(var(--light-mode-accent-color), var(--dark-mode-accent-color));
      }
    }

    a.disabled > code {
      background-color: light-dark(var(--light-mode-accent-color), var(--dark-mode-accent-color));
      color: white;
      border-color: light-dark(var(--light-mode-accent-color), var(--dark-mode-accent-color));
    }
  }
}

/* section for additional content */

section {
  display: flex;
  align-items: center;
  flex-direction: column;
  padding: 1rem 0;
}

/* tags posts wrapper */

section div#tags-posts-wrapper {
  width: 100%;
  margin-top: 1rem;
  padding: 0 1rem;

  ul {
    list-style: none;
  }

  li {
    list-style: none;
    padding: 0.75rem 0;
    border-bottom: 1px solid light-dark(var(--light-mode-border-color), var(--dark-mode-border-color));
    margin: 0;

    a {
      color: light-dark(var(--light-mode-font-color), var(--dark-mode-font-color));
      font-size: 1rem;
    }

    a:hover {
      color: light-dark(var(--light-mode-accent-color), var(--dark-mode-accent-color));
    }
  }

  li:last-child {
    border-bottom: none;
  }
}

/* load more button */

button#load-more {
  width: 200px;
  padding: 0.75rem 1.5rem;
  margin: 1.5rem auto;
  border: 1px solid light-dark(var(--light-mode-border-color), var(--dark-mode-border-color));
  border-radius: 8px;
  background-color: transparent;
  color: light-dark(var(--light-mode-font-color), var(--dark-mode-font-color));
  font-family: inherit;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

button#load-more:hover {
  background-color: light-dark(var(--light-mode-accent-color), var(--dark-mode-accent-color));
  color: white;
  border-color: light-dark(var(--light-mode-accent-color), var(--dark-mode-accent-color));
}

/* desktop layout */

@media all and (min-width: 901px) {
  body {
    width: 100vw;
    min-height: 100vh;
    display: flex;
    flex-direction: column;

    nav {
      width: 100%;
      height: 70px;
      padding: 0 2rem;
      border-bottom: 1px solid light-dark(var(--light-mode-border-color), var(--dark-mode-border-color));
      background-color: light-dark(#ffffff, #2d3748);
      position: sticky;
      top: 0;
      z-index: 100;

      .nav-inner {
        max-width: 900px;
        width: 100%;
        height: 100%;
        margin: 0 auto;
        display: flex;
        justify-content: space-between;
        align-items: center;
      }

      #nav-logo {
        gap: 0.75rem;
      }

      img#gh-avatar {
        width: 42px;
        height: 42px;
      }

      #site-title {
        font-size: 1.1rem;
      }

      ul#menus {
        display: flex;
        gap: 0.5rem;

        li {
          list-style: none;
          font-size: 1rem;
          border-radius: 6px;
          transition: all 0.2s ease;

          a {
            display: block;
            padding: 0.5rem 1rem;
          }
        }

        li:hover {
          cursor: pointer;
          background-color: light-dark(var(--light-mode-highlight-color), var(--dark-mode-highlight-color));
        }
      }
    }

    main {
      flex: 1;
      width: 100%;
      max-width: 900px;
      margin: 0 auto;
      padding: 2rem;

      article {
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;

        header, figure {
          width: 100%;
        }
      }

      section {
        width: 100%;
      }
    }
  }
}

/* mobile layout */

@media all and (max-width: 900px) {
  body {
    width: 100vw;
    min-height: 100vh;
    display: flex;
    flex-direction: column;

    nav {
      width: 100%;
      padding: 0 1rem;
      height: 60px;
      border-bottom: 1px solid light-dark(var(--light-mode-border-color), var(--dark-mode-border-color));
      background-color: light-dark(#ffffff, #2d3748);
      position: sticky;
      top: 0;
      z-index: 100;

      .nav-inner {
        max-width: 900px;
        width: 100%;
        height: 100%;
        margin: 0 auto;
        display: flex;
        justify-content: space-between;
        align-items: center;
      }

      #nav-logo {
        gap: 0.5rem;
      }

      img#gh-avatar {
        width: 36px;
        height: 36px;
      }

      #site-title {
        font-size: 1rem;
      }

      ul#menus {
        height: 100%;
        display: flex;
        justify-content: center;
        gap: 0;

        li {
          height: 100%;
          list-style: none;
          display: flex;
          align-items: center;
          font-size: 0.95rem;

          a {
            height: 100%;
            display: flex;
            align-items: center;
            padding: 0 0.875rem;
          }
        }

        li:hover {
          cursor: pointer;
        }
      }
    }

    main {
      flex: 1;
      width: 100%;
      padding: 1rem;
      overflow-y: auto;

      article {
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;

        header, figure {
          width: 100%;
        }
      }

      section {
        width: 100%;
      }
    }
  }
}

/* posts list */

div#article-body-content-wrapper > div#posts-wrapper {
  ul {
    list-style: none;
  }

  ul > li {
    list-style-type: none;
    margin-bottom: 1rem;
    background-color: light-dark(#ffffff, #2d3748);
    border: 1px solid light-dark(var(--light-mode-border-color), var(--dark-mode-border-color));
    border-radius: 8px;
    transition: all 0.2s ease;

    a {
      text-decoration: none;
      color: light-dark(var(--light-mode-font-color), var(--dark-mode-font-color));
      display: block;
      padding: 1.25rem;

      h3 {
        font-size: 1.1rem;
        margin: 0 0 0.5rem 0;
        font-weight: 600;
      }

      p {
        margin: 0;
        font-size: 0.9rem;
        color: light-dark(var(--light-mode-font-color-secondary), var(--dark-mode-font-color-secondary));
        line-height: 1.6;
      }
    }
  }

  ul > li:hover {
    border-color: light-dark(var(--light-mode-accent-color), var(--dark-mode-accent-color));
    box-shadow: 0 4px 12px light-dark(var(--light-mode-box-shadow-color), var(--dark-mode-box-shadow-color));
    transform: translateY(-2px);
  }
}