@layer reset, base, layout, components, prose, utilities;

@layer reset {
  *, *::before, *::after {
    box-sizing: border-box;
  }

  * {
    margin: 0;
  }

  img, svg {
    display: block;
    max-width: 100%;
    height: auto;
  }
}

@layer base {
  :root {
    color-scheme: light dark;

    /* Primitive Flexoki Palette (Light) */
    --fx-paper: #fffcf0;
    --fx-paper-2: #f2f0e5;
    --fx-ui: #e6e4d9;
    --fx-ui-1: #dad8ce;
    --fx-ui-2: #cecdc3;
    --fx-tx-3: #b7b5ac;
    --fx-tx-1: #6f6e69;
    --fx-tx: #100f0f;
    --fx-re: #d14d41;
    --fx-re-1: #af3029;

    /* Primitive Flexoki Palette (Dark) */
    --fx-dark-paper: #100f0f;
    --fx-dark-paper-2: #1c1b1a;
    --fx-dark-ui: #282726;
    --fx-dark-ui-1: #343331;
    --fx-dark-ui-2: #403e3c;
    --fx-dark-tx-3: #575653;
    --fx-dark-tx-1: #878580;
    --fx-dark-tx: #cecdc3;

    /* Semantic Tokens via light-dark() */
    --color-bg-canvas: light-dark(var(--fx-paper-2), var(--fx-dark-paper));
    --color-bg-surface: light-dark(var(--fx-paper), var(--fx-dark-paper-2));
    --color-bg-sidebar: light-dark(var(--fx-paper-2), var(--fx-dark-paper));
    --color-text-main: light-dark(var(--fx-tx-1), var(--fx-dark-tx));
    --color-text-strong: light-dark(var(--fx-tx), var(--fx-paper-2));
    --color-text-muted: light-dark(var(--fx-tx-3), var(--fx-dark-tx-3));
    --color-border: light-dark(var(--fx-ui), var(--fx-dark-ui));
    --color-accent: light-dark(var(--fx-re-1), var(--fx-re));
    --color-code-bg: light-dark(var(--fx-paper-2), var(--fx-dark-ui));
    --color-code-text: light-dark(var(--fx-tx), var(--fx-dark-tx));

    --color-error: var(--fx-re);
    --color-error-bg: light-dark(#fef2f2, #2c1514);
    --color-error-border: light-dark(#fecaca, #5c201e);

    /* Spacing & Sizes */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;

    /* Typography */
    --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;

    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
  }

  html {
    color-scheme: light dark;
    accent-color: var(--color-accent);
    font-family: var(--font-sans);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
  }

  body {
    background-color: var(--color-bg-canvas);
    color: var(--color-text-main);
    min-height: 100dvh;
  }

  a {
    color: var(--color-accent);
    text-decoration: none;

    &:hover {
      text-decoration: underline;
    }
  }

  h1, h2, h3, h4, h5, h6 {
    color: var(--color-text-strong);
    text-wrap: balance;
  }
}

@layer layout {
  .site-layout {
    max-width: 64rem;
    margin-inline: auto;
    min-height: 100dvh;

    @media (min-width: 768px) {
      display: flex;
      flex-direction: row-reverse;
    }
  }

  .site-sidebar {
    width: 100%;
    padding: var(--space-4);
    background-color: var(--color-bg-sidebar);
    border-bottom: 1px solid var(--color-border);

    @media (min-width: 768px) {
      width: 16rem;
      padding-block: var(--space-8);
      border-bottom: none;
      position: sticky;
      top: 0;
      align-self: flex-start;
      height: 100dvh;
      overflow-y: auto;
    }
  }

  .site-main {
    width: 100%;
    padding: var(--space-4);
    background-color: var(--color-bg-surface);

    @media (min-width: 768px) {
      width: 48rem;
      padding: var(--space-8);
      border-inline: 1px solid var(--color-border);
      min-height: 100dvh;
    }
  }
}

@layer components {
  /* Sidebar */
  .sidebar-title {
    font-weight: 700;
    font-size: var(--text-base);

    @media (min-width: 768px) {
      margin-top: var(--space-12);
      margin-bottom: var(--space-4);
    }
  }

  .sidebar-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  .short-posts-widget {
    margin-top: var(--space-8);
  }

  .short-post-item {
    margin-bottom: var(--space-4);
  }

  .short-post-body {
    font-size: var(--text-sm);
  }

  .short-post-date {
    font-size: var(--text-xs);
    opacity: 0.6;
  }

  .sidebar-footer {
    font-size: var(--text-sm);
    opacity: 0.6;

    @media (min-width: 768px) {
      margin-top: var(--space-4);
    }
  }

  /* Post Feed & Items */
  .post-feed {
    margin-block: var(--space-2);

    @media (min-width: 768px) {
      margin-block: var(--space-12);
    }
  }

  .post-item {
    margin-bottom: var(--space-12);
  }

  .post-title {
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--space-4);

    & a {
      color: inherit;
      text-decoration: none;

      &:hover {
        color: var(--color-accent);
        text-decoration: underline;
      }
    }
  }

  .post-link-item {
    margin-bottom: var(--space-8);
  }

  .post-link-title {
    font-size: var(--text-lg);
    font-weight: 700;
    margin-bottom: var(--space-2);

    & a:first-child {
      color: inherit;

      &:hover {
        color: var(--color-accent);
      }
    }
  }

  .post-link-date {
    font-size: var(--text-xs);
    font-weight: normal;
    opacity: 0.7;
    margin-inline-start: var(--space-2);
  }

  .post-divider {
    border: 0;
    border-top: 1px solid var(--color-border);
    width: 50%;
    margin-bottom: var(--space-8);
    margin-inline-start: calc(var(--space-4) * -1);

    @media (min-width: 768px) {
      margin-inline-start: calc(var(--space-8) * -1);
    }
  }

  .post-meta {
    width: 100%;
    font-size: var(--text-sm);
    display: flex;
    flex-direction: row-reverse;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-4);
  }

  .meta-badge {
    display: flex;
    align-items: center;
    gap: var(--space-1);
  }

  .icon {
    width: 1rem;
    height: 1rem;
    flex-shrink: 0;
  }

  /* Post Detail */
  .post-detail {
    margin-block: var(--space-2);

    @media (min-width: 768px) {
      margin-block: var(--space-12);
    }
  }

  .actor-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
  }

  .actor-avatar {
    border-radius: 9999px;
    width: 48px;
    height: 48px;
    flex-shrink: 0;
  }

  .actor-name {
    font-weight: 700;
    color: var(--color-text-strong);
  }

  .actor-handle {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
  }

  .in-reply-to {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-2);

    & a {
      color: var(--color-accent);
      display: inline-flex;
      align-items: center;
      gap: var(--space-2);
    }
  }

  .post-attachments {
    margin-block: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
  }

  .post-figure {
    margin: 0;
  }

  .post-image {
    border-radius: 0.25rem;
    border: 1px solid var(--color-border);
    max-width: 100%;
    height: auto;
  }

  .post-back-nav {
    margin-top: var(--space-8);
  }

  /* Responses */
  .responses-section {
    margin-block: var(--space-8);
  }

  .responses-title {
    font-weight: 700;
    margin-bottom: var(--space-4);
  }

  .response-item {
    margin-bottom: var(--space-6);
    font-size: var(--text-sm);
  }

  .response-header {
    margin-bottom: var(--space-1);
    color: var(--color-text-muted);
  }

  .response-author {
    font-weight: 700;
    color: var(--color-text-strong);
  }

  .response-body {
    margin-top: var(--space-1);
  }

  /* Archives */
  .post-archives {
    margin-block: var(--space-2);

    @media (min-width: 768px) {
      margin-block: var(--space-12);
    }
  }

  .archive-year-group {
    margin-bottom: var(--space-8);
  }

  .archive-year-heading {
    font-weight: 700;
    margin-bottom: var(--space-2);
  }

  .archive-list {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  .archive-item {
    margin-block: var(--space-1);
    display: flex;
    gap: var(--space-4);
  }

  .archive-date {
    font-variant-numeric: tabular-nums;
    min-width: 3.5rem;
  }

  /* Dev Login */
  .login-page {
    background-color: var(--color-bg-canvas);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    min-height: 100dvh;
    padding: var(--space-4);
  }

  .login-card {
    background-color: var(--color-bg-surface);
    padding: var(--space-8);
    border-radius: 0.5rem;
    border: 1px solid var(--color-border);
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.08), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    width: 100%;
    max-width: 24rem;
  }

  .login-title {
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--space-6);
    text-align: center;
  }

  .alert-error {
    color: var(--color-error);
    background-color: var(--color-error-bg);
    border: 1px solid var(--color-error-border);
    border-radius: 0.25rem;
    padding: var(--space-3);
    margin-bottom: var(--space-4);
    font-size: var(--text-sm);
  }

  .btn-primary {
    width: 100%;
    background-color: var(--color-accent);
    color: #fff;
    padding: var(--space-2) var(--space-4);
    border-radius: 0.25rem;
    border: 0;
    font-size: var(--text-base);
    font-weight: 600;
    cursor: pointer;
    transition: opacity 150ms ease;

    &:hover {
      opacity: 0.9;
    }
  }
}

@layer prose {
  .prose {
    line-height: 1.6;
    max-width: 75ch;
    color: var(--color-text-main);

    & p {
      margin-block: 1.25em;
      text-wrap: pretty;
      overflow-wrap: break-word;
    }

    & h1, & h2, & h3, & h4, & h5, & h6 {
      margin-top: 1.6em;
      margin-bottom: 0.6em;
      line-height: 1.25;
      font-weight: 700;
      color: var(--color-text-strong);
    }

    & h1 { font-size: 1.75em; }
    & h2 { font-size: 1.4em; }
    & h3 { font-size: 1.2em; }
    & h4 { font-size: 1.05em; }

    & a {
      color: var(--color-accent);
      text-decoration: underline;

      &:hover {
        text-decoration: underline;
      }
    }

    & strong {
      font-weight: 700;
      color: var(--color-text-strong);
    }

    & blockquote {
      margin-block: 1.5em;
      padding-inline-start: 1em;
      border-inline-start: 3px solid var(--color-border);
      font-style: italic;
    }

    & ul, & ol {
      margin-block: 1.25em;
      padding-inline-start: 1.5em;
    }

    & li {
      margin-block: 0.35em;
    }

    & pre {
      background-color: var(--color-code-bg);
      color: var(--color-code-text);
      padding: var(--space-4);
      border-radius: 0.375rem;
      overflow-x: auto;
      font-family: var(--font-mono);
      font-size: var(--text-sm);
      line-height: 1.5;
      margin-block: 1.5em;
    }

    & code:not(pre code) {
      background-color: var(--color-code-bg);
      color: var(--color-code-text);
      padding: 0.15em 0.35em;
      border-radius: 0.25rem;
      font-family: var(--font-mono);
      font-size: 0.875em;
    }

    & img {
      border-radius: 0.375rem;
      margin-block: 1.5em;
    }

    & hr {
      border: 0;
      border-top: 1px solid var(--color-border);
      margin-block: 2em;
    }

    & table {
      width: 100%;
      border-collapse: collapse;
      margin-block: 1.5em;
      font-size: 0.9em;
    }

    & th, & td {
      border: 1px solid var(--color-border);
      padding: var(--space-2) var(--space-3);
      text-align: start;
    }

    & th {
      background-color: var(--color-bg-canvas);
      font-weight: 700;
      color: var(--color-text-strong);
    }
  }

  .prose-sm {
    font-size: var(--text-sm);
  }

  .prose-lg {
    font-size: var(--text-lg);
  }
}