/* =========================================================================
   Journal — minimal, typography-first single-page blog
   -------------------------------------------------------------------------
   1. Theme variables (light / dark)
   2. Base
   3. Layout
   4. Header / profile
   5. Post header (date + share)
   6. Post content
   7. Tags + footer
   8. Responsive
   ========================================================================= */

/* 1. Theme variables ----------------------------------------------------- */
:root {
  --bg: #ffffff;
  --text: #1c1c1c;
  --muted: #767676;
  --rule: #e7e7e7;
  --code-bg: #f4f4f4;
  --mark: #ededed;
  --row-bg: #fafafa;
  --row-border: #252323;
  --row-link: #1c1c1c;
  --toggle-track: #e2e2e2;
  --toggle-knob: #7d7d7d;
  --content-width: 43rem;

  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #141414;
  --text: #d8d8d8;
  --muted: #8b8b8b;
  --rule: #2b2b2b;
  --code-bg: #1d1d1d;
  --mark: #2a2a2a;
  --row-bg: #161f29;
  --row-border: #6a6a6a;
  --row-link: #bfbfbf;
  --toggle-track: #333333;
  --toggle-knob: #cfcfcf;

  color-scheme: dark;
}

/* 2. Base ---------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--text);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", sans-serif;
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  text-decoration-color: var(--muted);
}

a:hover {
  text-decoration-color: currentColor;
}

::selection {
  background: var(--mark);
}

/* 3. Layout -------------------------------------------------------------- */
.container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 64px 24px 0;
}

/* 4. Header / profile ---------------------------------------------------- */
.profile {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-bottom: 88px;
}

.profile-link {
  flex: 0 0 auto;
  text-decoration: none;
}

.profile-image {
  width: 104px;
  height: 104px;
  border-radius: 50%;
  object-fit: cover;
}

.profile-about {
  min-width: 0;
}

.site-title {
  margin: 0 0 8px;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.site-link {
  color: inherit;
  text-decoration: none;
}

.socials {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.socials a {
  color: var(--muted);
  text-decoration: none;
}

.socials a:hover {
  color: var(--text);
}

.social-icon {
  display: block;
  width: 17px;
  height: 17px;
}

.profile-bio {
  margin: 0 0 14px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--muted);
}

/* Theme switch */
.mode {
  position: relative;
  display: inline-block;
  width: 34px;
  height: 18px;
  padding: 0;
  border: 0;
  border-radius: 9px;
  background: var(--toggle-track);
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}

.mode span {
  position: absolute;
  top: 3px;
  left: 3px;
  display: block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--toggle-knob);
  transition: transform 0.18s ease;
}

.mode.active span {
  transform: translateX(16px);
}

.mode:focus-visible {
  outline: 2px solid var(--muted);
  outline-offset: 3px;
}

/* 5. Post header (post page) --------------------------------------------- */
.post-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 20px;
  margin-bottom: 1.6rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.post-date {
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.post-share {
  display: flex;
  align-items: center;
  gap: 9px;
}

.post-share a,
.post-share button {
  padding: 0;
  border: 0;
  background: none;
  color: var(--muted);
  cursor: pointer;
  text-decoration: none;
}

.post-share a:hover,
.post-share button:hover {
  color: var(--text);
}

.post-share .social-icon {
  width: 15px;
  height: 15px;
}

/* 6. Post content (post page) -------------------------------------------- */
.blog-post-content h1 {
  margin: 0 0 1.5rem;
  font-size: 1.95rem;
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -0.015em;
}

.blog-post-content p {
  margin: 0 0 1.4rem;
}

.blog-post-content p:last-child {
  margin-bottom: 0;
}

.blog-post-content h3 {
  margin: 2.6rem 0 0.9rem;
  font-size: 1.22rem;
  font-weight: 700;
  line-height: 1.35;
}

.blog-post-content h4 {
  margin: 2rem 0 0.7rem;
  font-size: 1.02rem;
  font-weight: 700;
}

.blog-post-content ul,
.blog-post-content ol {
  margin: 0 0 1.4rem;
  padding-left: 1.3rem;
}

.blog-post-content li {
  margin-bottom: 0.4rem;
}

.blog-post-content li:last-child {
  margin-bottom: 0;
}

.blog-post-content li::marker {
  color: var(--muted);
}

.blog-post-content blockquote {
  margin: 1.9rem 0;
  padding-left: 1.15rem;
  border-left: 2px solid var(--rule);
  color: var(--muted);
  font-style: italic;
}

.blog-post-content hr {
  margin: 2.8rem 0;
  border: 0;
  border-top: 1px solid var(--rule);
}

.blog-post-content img {
  border-radius: 4px;
}

.blog-post-content figure {
  margin: 2rem 0;
}

.blog-post-content figure img {
  width: 100%;
}

.blog-post-content figcaption {
  margin-top: 0.7rem;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--muted);
}

.blog-post-content code {
  font-family:
    ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.86em;
}

.blog-post-content p code,
.blog-post-content li code {
  padding: 0.15em 0.35em;
  border-radius: 3px;
  background: var(--code-bg);
}

.blog-post-content pre {
  margin: 1.8rem 0;
  padding: 1rem 1.15rem;
  border-radius: 4px;
  background: var(--code-bg);
  font-size: 0.82rem;
  line-height: 1.65;
  overflow-x: auto;
}

.blog-post-content pre code {
  padding: 0;
  background: none;
  font-size: 1em;
}

/* 7. Index: post list + pagination (index.html) -------------------------- */
/* One post per row: full width, title left (80%), date right (20%). */
.post-list {
  display: flex;
  flex-flow: row wrap;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 5px 10px;
  margin-bottom: 7px;
  background: var(--row-bg);
  border: 1px dashed var(--row-border);
}

.post-list .post-title {
  width: 80%;
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--row-link);
  text-decoration: none;
}

.post-list .post-title:hover {
  text-decoration: underline;
  text-decoration-color: currentColor;
}

.post-list .post-date {
  width: 20%;
  font-size: 0.78rem;
  text-align: right;
  color: var(--muted);
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 3.5rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.pagination .next {
  margin-left: auto;
  text-align: right;
}

.filter-note {
  margin: 0 0 2rem;
  font-size: 0.82rem;
  color: var(--muted);
}

.filter-note .post-tag {
  text-decoration: none;
}

.notice {
  margin: 0 0 1rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--muted);
}

.notice code {
  font-size: 0.86em;
}

/* 8. Tags, navigation + footer ------------------------------------------- */
.tags-container {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin-top: 2.2rem;
  font-size: 0.78rem;
  color: var(--muted);
}

.post-tag {
  text-decoration: none;
}

.post-tag::before {
  content: "#";
}

.navigation {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px 28px;
  margin-top: 3.5rem;
  font-size: 0.85rem;
}

.navigation .next {
  margin-left: auto;
  text-align: right;
}

.footer {
  padding: 3rem 0 4rem;
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
}

.footer .heart {
  color: #d64545;
}

/* 9. Responsive ---------------------------------------------------------- */
@media (max-width: 640px) {
  body {
    font-size: 16.5px;
    line-height: 1.72;
  }

  .container {
    padding: 40px 20px 0;
  }

  .profile {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    margin-bottom: 60px;
  }

  .profile-image {
    width: 84px;
    height: 84px;
  }

  /* Keep title and date on one line, date pinned to the right. */
  .post-list {
    flex-wrap: nowrap;
    align-items: baseline;
    padding: 6px 10px;
  }

  .post-list .post-title {
    flex: 1 1 auto;
    width: auto;
    font-size: 0.98rem;
  }

  .post-list .post-date {
    flex: 0 0 auto;
    width: auto;
  }

  .post-header {
    margin-bottom: 1.3rem;
  }

  .blog-post-content h1 {
    font-size: 1.55rem;
  }

  .navigation {
    flex-direction: column;
    gap: 8px;
  }

  .navigation .next {
    margin-left: 0;
    text-align: left;
  }

  .blog-post-content h3 {
    margin-top: 2.2rem;
    font-size: 1.12rem;
  }

  .blog-post-content pre {
    font-size: 0.78rem;
  }

  .footer {
    padding: 2.5rem 0 3rem;
  }
}