/* Vishnu Papers — companion theme to vishnuprasanna.com.
   Mirrors the main site's V4 (Editorial × Chess Heritage) design tokens. */

:root {
  --color-ivory: #f4ede0;
  --color-cream: #ebe1cd;
  --color-ink: #1d1812;
  --color-walnut: #6b4a2b;
  --color-walnut-soft: #b8a07e;
  --color-green: #2d4a35;
  --color-gold: #d4b577;

  --font-display: "Fraunces", "Source Serif 4", Georgia, serif;
  --font-serif: "Newsreader", "Source Serif 4", Georgia, serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;
  --font-sans: "Inter Tight", ui-sans-serif, system-ui, sans-serif;

  --measure: 68ch;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-ivory);
  color: var(--color-ink);
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.65;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--color-walnut); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--color-ink); }

:focus-visible {
  outline: 2px solid var(--color-walnut);
  outline-offset: 3px;
  border-radius: 2px;
}

.container {
  width: min(1180px, 100% - 48px);
  margin-inline: auto;
}

.container-narrow {
  width: min(720px, 100% - 48px);
  margin-inline: auto;
}

/* ─── Masthead + nav ─────────────────────────────────────────────────────── */

.masthead {
  background: var(--color-ink);
  color: var(--color-ivory);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}
.masthead-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  justify-content: space-between;
  padding: 8px 0;
}
.masthead-notation { color: var(--color-walnut-soft); }
@media (max-width: 720px) {
  .masthead-notation { display: none; }
}

.site-nav {
  background: var(--color-ivory);
  border-bottom: 1px solid color-mix(in srgb, var(--color-walnut) 25%, transparent);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
}
.site-nav-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: var(--color-ink);
}
.site-nav-brand:hover { color: var(--color-ink); }
.site-nav-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1;
  letter-spacing: -0.005em;
}
.site-nav-sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-walnut);
  margin-top: 4px;
}
.site-nav-links {
  display: flex;
  gap: 30px;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 14px;
}
.site-nav-links a {
  color: var(--color-ink);
  text-decoration: none;
}
.site-nav-links a:hover { color: var(--color-walnut); }
.site-nav-cta {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 14px;
  background: var(--color-ink);
  color: var(--color-ivory);
  padding: 10px 18px;
  border: 0;
  cursor: pointer;
  text-decoration: none;
}
.site-nav-cta:hover { color: var(--color-ivory); background: var(--color-green); }

@media (max-width: 720px) {
  .site-nav-links { display: none; }
}

/* ─── Mini chess-board glyph (logo) ──────────────────────────────────────── */

.glyph {
  width: 36px;
  height: 36px;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
  position: relative;
}
.glyph > i { display: block; }
.glyph .light { background: var(--color-cream); }
.glyph .dark  { background: var(--color-walnut); }
.glyph .piece {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--color-ink);
  pointer-events: none;
  line-height: 1;
}

/* ─── Page hero (publication header) ─────────────────────────────────────── */

.publication-hero {
  background: var(--color-ink);
  color: var(--color-ivory);
  padding: 80px 0 96px;
  text-align: center;
}
.publication-hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--color-walnut-soft);
  margin-bottom: 14px;
}
.publication-hero h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(44px, 7vw, 80px);
  line-height: 1;
  letter-spacing: -0.025em;
  margin: 0 0 18px;
}
.publication-hero h1 em { color: var(--color-gold); font-style: italic; }
.publication-hero .tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(15px, 1.6vw, 18px);
  color: rgba(244, 237, 224, 0.75);
  max-width: 540px;
  margin: 0 auto 28px;
}

.subscribe-button {
  display: inline-block;
  padding: 14px 26px;
  background: var(--color-gold);
  color: var(--color-green);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  border: 0;
  cursor: pointer;
}
.subscribe-button:hover { background: var(--color-ivory); color: var(--color-green); }

/* ─── Post grid (homepage / archives) ────────────────────────────────────── */

.post-feed {
  padding: 64px 0 96px;
}

.lead-post {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 40px;
  align-items: center;
  padding-bottom: 56px;
  margin-bottom: 56px;
  border-bottom: 1px solid color-mix(in srgb, var(--color-walnut) 25%, transparent);
}
.lead-post .post-image {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--color-cream);
}
.lead-post .post-image img { width: 100%; height: 100%; object-fit: cover; }
.lead-post .meta { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; color: var(--color-walnut); margin-bottom: 14px; }
.lead-post h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0 0 18px;
}
.lead-post h2 a { color: inherit; text-decoration: none; }
.lead-post h2 a:hover { text-decoration: underline; text-underline-offset: 4px; }
.lead-post p { margin: 0 0 18px; max-width: 56ch; color: #2a2218; }
.lead-post .read-on { font-family: var(--font-serif); font-style: italic; font-size: 15px; }

@media (max-width: 760px) {
  .lead-post { grid-template-columns: 1fr; gap: 24px; }
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
}
@media (max-width: 1000px) { .post-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px)  { .post-grid { grid-template-columns: 1fr; } }

.post-card {
  display: block;
  text-decoration: none;
  color: inherit;
}
.post-card .post-image {
  aspect-ratio: 4/3;
  overflow: hidden;
  margin-bottom: 16px;
  background: var(--color-cream);
}
.post-card .post-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 240ms ease; }
.post-card:hover .post-image img { transform: scale(1.02); }
.post-card .meta {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--color-walnut);
  margin-bottom: 8px;
  text-transform: uppercase;
}
.post-card h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 22px;
  line-height: 1.2;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
.post-card:hover h3 { text-decoration: underline; text-underline-offset: 4px; }
.post-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.55;
  color: #3b2f22;
}

/* ─── Pagination ─────────────────────────────────────────────────────────── */

.pagination {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 56px;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 15px;
}
.pagination a, .pagination span {
  color: var(--color-walnut);
  text-decoration: none;
}
.pagination a:hover { color: var(--color-ink); text-decoration: underline; text-underline-offset: 3px; }
.pagination .page-number { font-family: var(--font-mono); font-style: normal; font-size: 11px; letter-spacing: 0.1em; color: var(--color-walnut); }

/* ─── Single post (article) ──────────────────────────────────────────────── */

.post-header {
  padding: 64px 0 32px;
  text-align: center;
}
.post-header .eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--color-walnut);
  margin-bottom: 18px;
}
.post-header h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(36px, 5.4vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  max-width: 26ch;
  margin-inline: auto;
}
.post-header .post-excerpt {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.55;
  color: #3b2f22;
  margin: 0 auto 24px;
  max-width: 56ch;
}
.post-header .byline {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--color-walnut);
  text-transform: uppercase;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}
.post-header .byline a { color: inherit; text-decoration: none; }
.post-header .byline a:hover { text-decoration: underline; }

.post-feature-image {
  width: min(1180px, 100% - 48px);
  margin-inline: auto;
  margin-bottom: 56px;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--color-cream);
}
.post-feature-image img { width: 100%; height: 100%; object-fit: cover; }

.post-content {
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.75;
  color: #1d1812;
  padding-bottom: 80px;
}
.post-content > p:first-of-type::first-letter {
  font-family: var(--font-display);
  font-size: 4em;
  float: left;
  line-height: 0.85;
  margin: 0.05em 0.08em 0 -0.05em;
  color: var(--color-walnut);
  font-weight: 400;
}
.post-content p { margin: 0 0 1.4em; }
.post-content h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(24px, 2.6vw, 32px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 2em 0 0.5em;
}
.post-content h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(20px, 2vw, 26px);
  margin: 1.6em 0 0.4em;
}
.post-content blockquote {
  margin: 1.6em 0;
  padding: 18px 24px;
  border-left: 3px solid var(--color-green);
  background: var(--color-cream);
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.4;
}
.post-content blockquote p { margin: 0; }
.post-content figure { margin: 2em 0; }
.post-content figcaption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--color-walnut);
  text-transform: uppercase;
  margin-top: 10px;
  text-align: center;
}
.post-content code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--color-cream);
  padding: 2px 6px;
  border-radius: 2px;
}
.post-content pre {
  font-family: var(--font-mono);
  background: var(--color-ink);
  color: var(--color-ivory);
  padding: 20px 24px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.6;
  margin: 1.6em 0;
}
.post-content pre code { background: transparent; padding: 0; color: inherit; }
.post-content hr {
  border: 0;
  border-top: 1px solid color-mix(in srgb, var(--color-walnut) 35%, transparent);
  margin: 2.4em auto;
  width: 60%;
}
.post-content a { color: var(--color-walnut); }
.post-content a:hover { color: var(--color-green); }

/* ─── Post-footer subscribe CTA ──────────────────────────────────────────── */

.post-cta {
  background: var(--color-green);
  color: var(--color-ivory);
  padding: 56px 0;
  text-align: center;
  margin-top: 32px;
}
.post-cta .eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: #c9b48e;
  margin-bottom: 14px;
}
.post-cta h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(28px, 4vw, 44px);
  margin: 0 0 16px;
  letter-spacing: -0.015em;
}
.post-cta h2 em { font-style: italic; color: var(--color-gold); }
.post-cta p {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(15px, 1.6vw, 18px);
  color: rgba(244, 237, 224, 0.85);
  max-width: 540px;
  margin: 0 auto 28px;
}

/* ─── Inline signup form ─────────────────────────────────────────────────── */

.signup-form {
  display: block;
  max-width: 520px;
  margin-inline: auto;
}
.signup-form .contact-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--color-walnut);
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}
.signup-row {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--color-walnut);
  align-items: stretch;
}
.signup-input {
  flex: 1;
  background: transparent;
  border: 0;
  color: var(--color-ink);
  font-family: var(--font-serif);
  font-size: 17px;
  padding: 10px 4px;
  outline: none;
  min-width: 0;
}
.signup-input::placeholder { color: rgba(29,24,18,0.4); }
.signup-input:focus-visible { outline: none; }

.signup-submit {
  background: transparent;
  border: 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 15px;
  color: var(--color-ink);
  padding: 10px 0 10px 14px;
  cursor: pointer;
  white-space: nowrap;
}
.signup-submit:hover { color: var(--color-walnut); }
.signup-submit:disabled { opacity: 0.6; cursor: not-allowed; }

.signup-status {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 14px;
  margin: 12px 0 0;
  min-height: 1.5em;
  color: var(--color-walnut);
}
.signup-status[data-state="error"] { color: #a83232; }
.signup-status[data-state="success"] { color: var(--color-green); }

/* Compact variant — sits alongside nav. Single-line, no label. */
.signup-form--compact { max-width: 320px; margin: 0; }
.signup-form--compact .signup-row { border-bottom-color: var(--color-walnut-soft); }
.signup-form--compact .signup-input { font-size: 15px; padding: 8px 4px; }
.signup-form--compact .signup-submit { font-size: 14px; padding: 8px 0 8px 12px; }
.signup-form--compact .signup-status { font-size: 12px; margin-top: 6px; }

/* Dark variant — used inside the post-footer CTA on the green surface. */
.signup-form--dark .contact-label { color: #c9b48e; }
.signup-form--dark .signup-row { border-bottom-color: rgba(244,237,224,0.4); }
.signup-form--dark .signup-input { color: var(--color-ivory); }
.signup-form--dark .signup-input::placeholder { color: rgba(244,237,224,0.45); }
.signup-form--dark .signup-submit { color: var(--color-gold); }
.signup-form--dark .signup-submit:hover { color: var(--color-ivory); }
.signup-form--dark .signup-status { color: rgba(244,237,224,0.75); }
.signup-form--dark .signup-status[data-state="success"] { color: var(--color-gold); }
.signup-form--dark .signup-status[data-state="error"] { color: #f7c5b8; }

/* ─── Site footer ────────────────────────────────────────────────────────── */

.site-footer {
  background: var(--color-ink);
  color: rgba(244, 237, 224, 0.5);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 32px 0;
}
.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
}
.site-footer a { color: var(--color-walnut-soft); text-decoration: underline; }
.site-footer a:hover { color: var(--color-gold); }

/* ─── Tag / author header ────────────────────────────────────────────────── */

.archive-header {
  padding: 64px 0 48px;
  text-align: center;
  border-bottom: 1px solid color-mix(in srgb, var(--color-walnut) 25%, transparent);
}
.archive-header .eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--color-walnut);
  margin-bottom: 14px;
}
.archive-header h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(36px, 5.4vw, 56px);
  margin: 0;
  letter-spacing: -0.02em;
}
.archive-header p {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 17px;
  color: var(--color-walnut);
  max-width: 56ch;
  margin: 14px auto 0;
}

/* ─── Koenig editor cards (Ghost) ────────────────────────────────────────── */
/* These classes wrap content from Ghost's Koenig editor — required by GScan
   for bookmark cards, wide/full-bleed images, galleries, etc. */

.kg-width-wide {
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
  max-width: 1180px;
  margin-inline: auto;
}
.kg-width-full {
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
}
.kg-width-full img,
.kg-width-wide img { width: 100%; }

.kg-bookmark-card,
.kg-bookmark-publisher {
  margin: 1.6em 0;
}
.kg-bookmark-container {
  display: flex;
  background: var(--color-cream);
  border: 1px solid color-mix(in srgb, var(--color-walnut) 25%, transparent);
  text-decoration: none;
  color: inherit;
  min-height: 148px;
  overflow: hidden;
}
.kg-bookmark-container:hover { border-color: var(--color-walnut); }
.kg-bookmark-content {
  flex: 1;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.kg-bookmark-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  line-height: 1.3;
  color: var(--color-ink);
  margin-bottom: 6px;
}
.kg-bookmark-description {
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.5;
  color: #3b2f22;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.kg-bookmark-metadata {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--color-walnut);
  margin-top: 12px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.kg-bookmark-metadata .kg-bookmark-icon {
  width: 18px;
  height: 18px;
}
.kg-bookmark-author,
.kg-bookmark-publisher {
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}
.kg-bookmark-thumbnail {
  flex: 0 1 240px;
  position: relative;
  min-height: 148px;
}
.kg-bookmark-thumbnail img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
@media (max-width: 640px) {
  .kg-bookmark-container { flex-direction: column-reverse; }
  .kg-bookmark-thumbnail { aspect-ratio: 16/9; }
}

/* Galleries, callouts, video, audio, file cards inherit reasonable defaults
   from the surrounding .post-content tokens. Add per-card refinements as
   they show up in real posts. */

/* ─── Error page ─────────────────────────────────────────────────────────── */

.error-page {
  padding: 96px 0 120px;
  text-align: center;
}
.error-page .code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--color-walnut);
}
.error-page h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(40px, 6vw, 72px);
  margin: 18px 0;
  letter-spacing: -0.02em;
}
.error-page a {
  font-family: var(--font-serif);
  font-style: italic;
}