@layer base, module, utilities;

@layer base {
  :root {
    --bg: oklch(0.24 0.00003 271);
    --bg-deep: oklch(from var(--bg) calc(l - 0.04) c h);
    --surface: oklch(0.27 0.00003 286);
    --surface-hover: oklch(0.3 0.00003 271);
    --surface-glass: oklch(0.24 0.00003 271 / 0.851);
    --border: oklch(0.36 0.00003 271);
    --border-light: oklch(1 0.00003 271 / 0.2);
    --text-primary: oklch(0.9 0.0001 271);
    --text-secondary: oklch(0.74 0.00008 271);
    --accent: oklch(0.66 0.17941 254);
    --accent-hover: oklch(0.72 0.14568 251);
    --badge-bg: oklch(0.32 0.00004 271);
    --shadow: oklch(0 0 0 / 0.3);

    --focus-ring-color: var(--accent);
    --focus-ring-width: 0.125rem;
    --focus-ring-offset: 0.125rem;

    --container-width: 1000px;
    --grid-gap: 1rem;
    --icon-size: 2rem;

    --status-bar-height: 3.5rem;

    --ease-snap: cubic-bezier(0.16, 1, 0.3, 1);
  }

  html {
    box-sizing: border-box;
    font-family: "Jersey 25", sans-serif;
    letter-spacing: 0.5px;
  }

  *,
  *::before,
  *::after {
    box-sizing: inherit;
  }

  body {
    background: var(--bg);
    color: var(--text-primary);
    margin: 0;
    padding-bottom: var(--status-bar-height);
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    margin: 0;
    font-size: inherit;
    font-weight: inherit;
  }

  button {
    font-family: inherit;
    font-size: 100%;
  }

  :focus-visible {
    outline: var(--focus-ring-width) solid var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
  }
}

@layer utilities {
}

@layer module {
  body {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
  }

  /* Header */
  header {
    text-align: center;
    padding: 5rem 1.25rem 3.75rem;
    max-width: 50rem;
  }

  h1 {
    margin-bottom: 2rem;
    font-size: 4rem;
    letter-spacing: 1px;
  }

  .subtitle {
    margin-bottom: 3rem;
    color: var(--text-secondary);
    font-size: 1.25rem;
    line-height: 1.6;
  }

  .actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 999px;
    text-decoration: none;
    transition:
      background-color 0.2s var(--ease-snap),
      color 0.2s var(--ease-snap),
      border-color 0.2s var(--ease-snap),
      box-shadow 0.2s var(--ease-snap),
      translate 0.2s var(--ease-snap);
  }

  .btn-primary {
    background-color: var(--accent);
    color: white;
    box-shadow: 0 0.25rem 0.875rem oklch(from var(--accent) l c h / 0.3);

    @media (hover: hover) {
      &:hover {
        background-color: var(--accent-hover);
        box-shadow: 0 0.375rem 1.25rem oklch(from var(--accent) l c h / 0.4);
        translate: 0 -0.125rem;
      }
    }
  }

  .btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);

    @media (hover: hover) {
      &:hover {
        border-color: var(--border-light);
        background-color: var(--surface);
        translate: 0 -0.125rem;
      }
    }
  }

  /* Main Content */
  main {
    width: 100%;
    max-width: var(--container-width);
    padding: 1.25rem 1.25rem 3.75rem;
  }

  section {
    &:not(:last-child) {
      margin-bottom: 3.5rem;
    }

    &:last-child {
      margin-bottom: 5rem;
    }
  }

  h2 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
  }

  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(7.5rem, 1fr)); /* 120px */
    gap: var(--grid-gap);
  }

  /* Component: Icon Card */
  .icon-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    background: var(--surface);
    user-select: none;
    transition:
      border-color 0.2s var(--ease-snap),
      background-color 0.2s var(--ease-snap),
      box-shadow 0.2s var(--ease-snap),
      translate 0.2s var(--ease-snap),
      scale 0.2s var(--ease-snap);
    cursor: default;
    outline: none;

    img {
      width: var(--icon-size);
      height: var(--icon-size);
      margin-bottom: 1rem;
      filter: drop-shadow(0 0.25rem 0.375rem var(--shadow));
      image-rendering: pixelated;
      transition: scale 0.2s var(--ease-snap);
    }

    span {
      color: var(--text-secondary);
      font-size: 1rem;
      text-align: center;
    }

    @media (hover: hover) {
      &:hover {
        border-color: var(--accent);
        background-color: var(--surface-hover);
        box-shadow: 0 0.5rem 1.5rem var(--shadow);
        translate: 0 -0.25rem;

        img {
          scale: 1.5;
        }
      }
    }

    &:focus-visible,
    &.is-active {
      border-color: var(--accent);
      outline: var(--focus-ring-width) solid var(--focus-ring-color);
      outline-offset: var(--focus-ring-offset);
      background-color: var(--surface-hover);
      translate: 0 -0.25rem;

      img {
        scale: 1.5;
      }
    }
  }

  .folder-pair {
    display: flex;
    gap: 0.75rem;
  }

  /* Component: Footer */
  footer {
    width: 100%;
    margin-top: auto;
    border-top: 1px solid var(--border);
    padding: 3.75rem 1.25rem;
    background: var(--bg-deep);
    color: var(--text-secondary);
    font-size: 0.95rem;
    text-align: center;
  }

  .footer-link {
    border-bottom: 1px dotted var(--border-light);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 2px; /* slight rounding for focus ring */

    &:hover {
      color: var(--accent);
      border-bottom-style: solid;
    }
  }

  /* Component: Status Bar */
  #status-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    display: flex;
    align-items: center;
    width: 100%;
    height: var(--status-bar-height);
    padding: 0 1.5rem;
    border-top: 2px solid var(--border-light);
    background: var(--bg-deep);
    color: white;
    font-size: 1.25rem;
    z-index: 100;
    box-shadow: 0 -0.25rem 0.75rem var(--shadow);
  }

  .status-content {
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 1rem;
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    white-space: nowrap;
  }

  .status-icon {
    width: 2rem;
    height: 2rem;
    image-rendering: pixelated;
    transition:
      visibility 0.4s var(--ease-snap),
      opacity 0.4s var(--ease-snap),
      scale 0.4s var(--ease-snap);

    &.is-hidden {
      visibility: hidden;
      opacity: 0;
      scale: 0.5;
    }
  }

  .status-text {
    overflow: hidden;
    flex: 1;
    letter-spacing: 1px;
    text-overflow: ellipsis;
  }

  /* Responsiveness */
  @media (max-width: 600px) {
    h1 {
      font-size: 2rem;
    }

    .grid {
      grid-template-columns: repeat(auto-fill, minmax(6.25rem, 1fr));
    }

    .actions {
      flex-direction: column;
      width: 100%;
    }

    .btn {
      justify-content: center;
      width: 100%;
    }
  }
}