/* =============================================
   DESIGN TOKENS — paper diary (single palette)
   ============================================= */

:root {
  /* Colors — aged paper / ink */
  --color-bg:           #e4e1d6;
  --color-bg-subtle:    #d7d4c8;
  --color-text:         #1c1b19;
  --color-text-2:       #3b3a36;
  --color-text-3:       #6b6a63;
  --color-border:       #cfccc0;
  --color-border-2:     #1c1b19;
  --color-accent:       #8a3a1f;
  --color-accent-hover: #6e2e18;
  --color-accent-bg:    #e9dcd2;

  /* Typography */
  --font-display: 'Bitter', serif;
  --font-body:    'Noto Serif', serif;
  --font-label:   'Oswald', sans-serif;
  --font-mono:    'Fira Code', 'Cascadia Code', 'Courier New', monospace;

  /* Spacing */
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-5:  1.25rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-14: 3.5rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;

  /* Layout */
  --container-width: 1280px;
  --content-width:   740px;
  --container-pad:   clamp(1rem, 5vw, 2.5rem);

  /* Shape — paper diary has no rounded corners */
  --radius: 0px;

  /* Nav */
  --nav-height: 64px;

  /* Motion */
  --ease:       cubic-bezier(0.16, 1, 0.3, 1);
  --duration:   200ms;
  --transition: var(--duration) var(--ease);
}

/* =============================================
   RESET & BASE
   ============================================= */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image: url("../images/paper-texture.jpg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100dvh;
  position: relative;
}

/* darken/blend the paper photo so ink stays legible, matching the
   reference template's .page::before treatment */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: rgb(from var(--color-bg) r g b / 0.45);
  mix-blend-mode: multiply;
  pointer-events: none;
  z-index: 0;
}

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

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font: inherit;
}

ul, ol {
  list-style: none;
}

/* =============================================
   LAYOUT
   ============================================= */

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.container-narrow {
  width: 100%;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  position: relative;
  z-index: 1;
}

#site-main {
  flex: 1;
}

/* =============================================
   TYPOGRAPHY BASE
   ============================================= */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text);
}

/* =============================================
   BUTTONS
   ============================================= */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.5625rem 1.125rem;
  font-family: var(--font-label);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  line-height: 1;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  transition:
    background-color var(--transition),
    border-color var(--transition),
    color var(--transition);
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--color-border-2);
  color: var(--color-text);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-ghost {
  background-color: transparent;
  border-color: transparent;
  color: var(--color-text-2);
}

.btn-ghost:hover {
  color: var(--color-text);
}

/* =============================================
   TAGS
   ============================================= */

.post-tag {
  display: inline-block;
  font-family: var(--font-label);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-accent);
  transition: opacity var(--transition);
}

.post-tag:hover {
  opacity: 0.75;
}

.post-tag-pill {
  padding: var(--sp-1) var(--sp-3);
  border: 1px solid var(--color-border-2);
  border-radius: var(--radius);
  color: var(--color-text-2);
  font-family: var(--font-label);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  transition: border-color var(--transition), color var(--transition);
}

.post-tag-pill:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  opacity: 1;
}

/* =============================================
   READING PROGRESS BAR
   ============================================= */

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
  transform-origin: left center;
  transform: scaleX(0);
  z-index: 200;
  transition: transform 80ms linear;
}

/* =============================================
   SITE HEADER
   ============================================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: 3px solid var(--color-text);
}

.site-nav {
  display: flex;
  align-items: center;
  height: var(--nav-height);
  gap: var(--sp-6);
}

.site-nav-logo {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 900;
  text-transform: uppercase;
  color: var(--color-text);
  flex-shrink: 0;
  letter-spacing: 0.02em;
  transition: opacity var(--transition);
}

.site-nav-logo:hover {
  opacity: 0.7;
}

.site-nav-logo img {
  height: 28px;
  width: auto;
  display: block;
}

.site-nav-links {
  flex: 1;
  display: flex;
  justify-content: center;
}

.site-nav-links .nav {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}

.site-nav-links .nav a {
  font-family: var(--font-label);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-2);
  transition: color var(--transition);
}

.site-nav-links .nav a:hover,
.site-nav-links .nav .nav-current > a {
  color: var(--color-text);
}

.site-nav-right {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

/* Hamburger */
.site-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 4px;
}

.site-nav-toggle span {
  display: block;
  height: 1.5px;
  background-color: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.site-nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.site-nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.site-nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* =============================================
   SITE FOOTER
   ============================================= */

.site-footer {
  border-top: 1px solid var(--color-text);
  padding: var(--sp-10) 0;
  margin-top: var(--sp-20);
}

.site-footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
  flex-wrap: wrap;
}

.site-footer-logo {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 900;
  text-transform: uppercase;
  color: var(--color-text);
  letter-spacing: 0.02em;
  transition: opacity var(--transition);
}

.site-footer-logo:hover {
  opacity: 0.7;
}

.site-footer-logo img {
  height: 22px;
  width: auto;
  display: block;
}

.site-footer-nav .nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-5);
}

.site-footer-nav .nav a {
  font-family: var(--font-label);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-text-2);
  transition: color var(--transition);
}

.site-footer-nav .nav a:hover {
  color: var(--color-text);
}

.site-footer-copy {
  font-family: var(--font-label);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-text-3);
}

.site-footer-copy a {
  color: var(--color-text-3);
  transition: color var(--transition);
}

.site-footer-copy a:hover {
  color: var(--color-accent);
}

/* =============================================
   POST ENTRY — shared list item (home, tag/author archives)
   ============================================= */

.entry-list {
  display: flex;
  flex-direction: column;
  padding: var(--sp-12) 0 var(--sp-20);
}

.post-entry {
  padding: var(--sp-8) 0;
  border-bottom: 1px solid var(--color-border);
}

.post-entry:first-child {
  padding-top: 0;
}

.post-entry:last-child {
  border-bottom: none;
}

.post-entry-title {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 1.5rem;
  line-height: 1.15;
  margin-top: var(--sp-2);
  color: var(--color-text);
}

.post-entry-title a {
  color: inherit;
  transition: color var(--transition);
}

.post-entry-title a:hover {
  color: var(--color-accent);
}

.post-entry-excerpt {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text-2);
  line-height: 1.65;
  margin-top: var(--sp-2);
  max-width: 62ch;
}

.post-entry-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-label);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-3);
  margin-top: var(--sp-3);
}

/* =============================================
   PAGINATION
   ============================================= */

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--sp-4);
  margin-top: var(--sp-12);
  padding-top: var(--sp-10);
  border-top: 1px solid var(--color-border);
}

.pagination .older-posts,
.pagination .newer-posts {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-2);
  border: 1.5px solid var(--color-border-2);
  border-radius: var(--radius);
  transition: border-color var(--transition), color var(--transition);
}

.pagination .older-posts:hover,
.pagination .newer-posts:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.pagination .page-number {
  font-size: 0.875rem;
  color: var(--color-text-3);
}

/* =============================================
   ARTICLE (single post)
   ============================================= */

.article {
  padding-bottom: var(--sp-24);
}

.article-header {
  padding: var(--sp-16) 0 var(--sp-10);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-label);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-3);
  margin-bottom: var(--sp-6);
}

.reading-time {
  color: var(--color-text-3);
}

.article-title {
  font-size: clamp(2rem, 5vw, 3.375rem);
  font-weight: 900;
  font-style: italic;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-bottom: var(--sp-5);
}

.article-excerpt {
  font-size: 1.125rem;
  color: var(--color-text-2);
  line-height: 1.7;
  max-width: 54ch;
  margin-bottom: var(--sp-6);
}

.article-byline {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-label);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-2);
}

.article-byline .author-name {
  font-weight: 500;
  color: var(--color-text-2);
  transition: color var(--transition);
}

.article-byline .author-name:hover {
  color: var(--color-accent);
}

/* =============================================
   FEATURE IMAGE
   ============================================= */

.article-feature-image {
  margin: 0;
  width: 100%;
  overflow: hidden;
  max-height: 60vh;
}

.article-feature-image img {
  width: 100%;
  height: 100%;
  max-height: 60vh;
  object-fit: cover;
  display: block;
}

.article-feature-image figcaption {
  max-width: var(--content-width);
  margin: var(--sp-3) auto 0;
  padding: 0 var(--container-pad);
  font-size: 0.8125rem;
  color: var(--color-text-3);
  text-align: center;
}

/* =============================================
   ARTICLE BODY (prose)
   ============================================= */

.article-body {
  padding-top: var(--sp-12);
  padding-bottom: var(--sp-12);
}

.article-body > * + * {
  margin-top: 1.5em;
}

.article-body p {
  font-size: 1.125rem;
  line-height: 1.85;
  color: var(--color-text);
}

.article-body > p:first-of-type::first-letter {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 3.2rem;
  line-height: 0.8;
  float: left;
  padding: 4px 6px 0 0;
  color: var(--color-text);
}

.article-body h2 {
  font-size: 1.625rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-top: 2.5em;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
  margin-top: 2em;
}

.article-body h4 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-top: 1.75em;
}

.article-body a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: opacity var(--transition);
}

.article-body a:hover {
  opacity: 0.8;
}

.article-body ul,
.article-body ol {
  padding-left: 1.5em;
  font-size: 1.125rem;
  line-height: 1.75;
}

.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li + li { margin-top: 0.4em; }

.article-body blockquote {
  border: none;
  border-top: 1px solid var(--color-text);
  border-bottom: 1px solid var(--color-text);
  padding: var(--sp-4) 0;
  margin: var(--sp-8) 0;
  background: none;
}

.article-body blockquote p {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  font-style: italic;
  color: var(--color-text);
  margin: 0;
  line-height: 1.4;
}

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--color-bg-subtle);
  padding: 0.15em 0.4em;
  border-radius: var(--radius);
  border: 1px solid var(--color-border-2);
  color: var(--color-accent);
}

.article-body pre {
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border-2);
  border-radius: var(--radius);
  padding: var(--sp-6);
  overflow-x: auto;
}

.article-body pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--color-text);
}

.article-body figure {
  margin: var(--sp-8) 0;
}

.article-body figure img {
  border-radius: var(--radius);
  width: 100%;
}

.article-body figcaption {
  font-size: 0.8125rem;
  color: var(--color-text-3);
  text-align: center;
  margin-top: var(--sp-2);
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--sp-12) 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.article-body th,
.article-body td {
  text-align: left;
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--color-border);
}

.article-body th {
  font-weight: 600;
  color: var(--color-text);
}

.article-body td {
  color: var(--color-text-2);
}

/* =============================================
   ARTICLE FOOTER
   ============================================= */

.article-footer {
  padding-top: var(--sp-10);
  border-top: 1px solid var(--color-border);
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-bottom: var(--sp-8);
}

/* =============================================
   AUTHOR CARD
   ============================================= */

.author-card {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-4);
  padding: var(--sp-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-top: var(--sp-6);
  background-color: var(--color-bg-subtle);
}

.author-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  display: block;
}

.author-info {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  min-width: 0;
}

.author-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-3);
}

.author-info .author-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  transition: color var(--transition);
}

.author-info .author-name:hover {
  color: var(--color-accent);
}

.author-bio {
  font-size: 0.9375rem;
  color: var(--color-text-2);
  line-height: 1.65;
  margin-top: var(--sp-2);
}

/* =============================================
   TAG / AUTHOR ARCHIVE
   ============================================= */

.archive-page {
  padding-bottom: var(--sp-24);
}

.archive-header {
  padding: var(--sp-16) 0 var(--sp-12);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--sp-12);
}

.archive-title {
  font-family: var(--font-display);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  font-size: clamp(1.75rem, 4vw, 2.625rem);
  border-bottom: 2px solid var(--color-text);
  padding-bottom: var(--sp-3);
  margin-bottom: var(--sp-3);
}

.archive-description {
  font-size: 1rem;
  color: var(--color-text-2);
  max-width: 50ch;
  line-height: 1.65;
}

.archive-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin-top: var(--sp-5);
  flex-wrap: wrap;
}

.archive-count {
  font-size: 0.875rem;
  color: var(--color-text-3);
}

.author-location,
.author-website {
  font-size: 0.875rem;
  color: var(--color-text-3);
}

.author-website {
  color: var(--color-accent);
  transition: opacity var(--transition);
}

.author-website:hover {
  opacity: 0.8;
}

.author-page-header .author-page-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  margin-bottom: var(--sp-5);
}

/* =============================================
   ERROR PAGE
   ============================================= */

.error-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60dvh;
  padding: var(--sp-16) 0;
}

.error-content {
  text-align: center;
  max-width: 420px;
}

.error-code {
  font-family: var(--font-display);
  font-size: 5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-border-2);
  margin-bottom: var(--sp-5);
}

.error-title {
  font-size: 1.375rem;
  font-weight: 600;
  margin-bottom: var(--sp-3);
}

.error-description {
  font-size: 1rem;
  color: var(--color-text-2);
  max-width: 38ch;
  margin: 0 auto var(--sp-8);
  line-height: 1.65;
}

/* =============================================
   GHOST CARD OVERRIDES
   ============================================= */

.article-body .kg-card {
  margin: var(--sp-8) 0;
}

.article-body .kg-image-card img {
  border-radius: var(--radius);
}

.article-body .kg-gallery-card .kg-gallery-container {
  border-radius: var(--radius);
  overflow: hidden;
}

.article-body .kg-width-wide {
  margin-left: calc(-1 * (var(--content-width) * 0.1));
  margin-right: calc(-1 * (var(--content-width) * 0.1));
}

.article-body .kg-width-full {
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  width: 100vw;
}

.article-body .kg-callout-card {
  border-radius: var(--radius);
  background-color: var(--color-bg-subtle);
  border-color: var(--color-border-2);
  color: var(--color-text);
}

.article-body .kg-callout-text {
  color: var(--color-text);
}

.article-body .kg-bookmark-card {
  border-radius: var(--radius);
  border-color: var(--color-border-2);
  background-color: var(--color-bg-subtle);
}

.article-body .kg-bookmark-card:hover {
  border-color: var(--color-accent);
}

.article-body .kg-bookmark-title {
  color: var(--color-text);
}

.article-body .kg-bookmark-description {
  color: var(--color-text-2);
}

.article-body .kg-toggle-card {
  border-color: var(--color-border-2);
  border-radius: var(--radius);
  background-color: var(--color-bg-subtle);
}

.article-body .kg-toggle-heading-text {
  color: var(--color-text);
}

/* =============================================
   RESPONSIVE
   ============================================= */

@media (max-width: 768px) {
  :root {
    --nav-height: 56px;
  }

  /* Mobile nav */
  .site-nav-links {
    display: none;
    position: absolute;
    top: calc(var(--nav-height) + 3px);
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--sp-4) var(--container-pad);
    z-index: 99;
  }

  .site-nav-links.is-open {
    display: block;
  }

  .site-nav-links .nav {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-4);
  }

  .site-nav-links .nav a {
    font-size: 1rem;
  }

  .site-nav-toggle {
    display: flex;
  }

  .site-footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-5);
  }

  .article-header {
    padding: var(--sp-10) 0 var(--sp-8);
  }

  /* Post entry */
  .post-entry-title {
    font-size: 1.3rem;
  }

  body {
    background-attachment: scroll;
  }
}

@media (max-width: 480px) {
  .article-feature-image {
    max-height: 45vh;
  }

  .author-card {
    flex-direction: column;
  }
}

/* =============================================
   REDUCED MOTION
   ============================================= */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reading-progress {
    transition: none;
  }
}