/* Manuscript-inspired surfaces + modern “science site” layout.
   Optional texture: drop a file at /images/textures/parchment.jpg and uncomment the background rule in .science-home. */

:root {
  /* Widen PaperMod’s default ~720px main column (see themes/PaperMod theme-vars + main.css) */
  --main-width: min(1180px, 92vw);
  --nav-width: min(1380px, 96vw);
  --content-max-width: 1400px;
  --card-radius: 14px;
  --ink: #1c140c;
  --ink-muted: #4a3f33;
  --paper: #f6f0e6;
  --paper-2: #efe6d8;
  --edge: rgba(28, 20, 12, 0.14);
  --accent: #5c3d1e;
  --accent-2: #2f6b4f;
  --shadow: 0 14px 40px rgba(18, 12, 8, 0.08);
  --shadow-soft: 0 8px 24px rgba(18, 12, 8, 0.06);
  /* Full-width section bands (light brown / grey — DeepMind-style separation) */
  --band-tan: #efe8dc;
  --band-grey: #e5e5e3;
  --band-cream: #f4f1eb;
  --band-warm: #ebe3d7;
}

/* Map PaperMod surface tokens to warmer paper tones (light) */
:root:not([data-theme="dark"]) {
  --theme: var(--paper);
  --entry: #fffdf8;
  --primary: var(--ink);
  --secondary: var(--ink-muted);
  --tertiary: #e8dfd2;
  --content: var(--ink);
  --code-bg: #f0e8dc;
  --border: var(--edge);
}

/* Dark: “night desk” — still structured, not pure OLED black */
:root[data-theme="dark"] {
  --ink: #efe6d8;
  --ink-muted: #cbbfaf;
  --paper: #14110e;
  --paper-2: #1b1713;
  --edge: rgba(255, 245, 230, 0.12);
  --accent: #e0c29a;
  --accent-2: #7bd4a7;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.35);
  --band-tan: #1c1915;
  --band-grey: #1a1a18;
  --band-cream: #181816;
  --band-warm: #1e1b17;
}

body {
  color: var(--content);
  background: radial-gradient(1200px 800px at 20% -10%, rgba(92, 61, 30, 0.08), transparent 55%),
    radial-gradient(900px 600px at 90% 0%, rgba(47, 107, 79, 0.07), transparent 50%),
    var(--theme);
}

.science-home {
  /* Uncomment to use a real parchment scan (place file in static/images/textures/)
  background-image: linear-gradient(to bottom, rgba(246, 240, 230, 0.92), rgba(246, 240, 230, 0.92)),
    url("/images/textures/parchment.jpg");
  background-size: cover;
  background-attachment: fixed;
  */
  padding-bottom: 0;
}

/* Homepage: two columns (main + sticky sidebar), full-width bands in main column */
.science-home--split {
  width: 100%;
  max-width: var(--content-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-bottom: 2.5rem;
}
.dm-home-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) min(300px, 28vw);
  gap: clamp(1.25rem, 2.5vw, 2rem);
  align-items: start;
}
.dm-home-main {
  min-width: 0;
  border-radius: 0;
}
.dm-home-aside {
  min-width: 0;
}
.dm-aside-sticky {
  position: sticky;
  top: 5.75rem;
  z-index: 2;
}
.dm-aside-sticky .box {
  background: var(--entry);
}
@media (max-width: 960px) {
  .dm-home-split {
    grid-template-columns: 1fr;
  }
  .dm-aside-sticky {
    position: relative;
    top: auto;
  }
  .dm-home-aside {
    padding-top: 0.5rem;
  }
}

/* Full-bleed (within main) alternating bands */
.dm-band {
  padding: 2rem 0;
  border-bottom: 1px solid rgba(60, 48, 36, 0.08);
}
:root[data-theme="dark"] .dm-band {
  border-bottom-color: rgba(255, 245, 230, 0.06);
}
.dm-band--tan {
  background: var(--band-tan);
}
.dm-band--grey {
  background: var(--band-grey);
}
.dm-band--cream {
  background: var(--band-cream);
}
.dm-band--warm {
  background: var(--band-warm);
}
.dm-home-main > .dm-band:first-child {
  border-top-left-radius: 18px;
  border-top-right-radius: 18px;
}
.dm-home-main > .dm-band:last-child {
  border-bottom-left-radius: 18px;
  border-bottom-right-radius: 18px;
}
.dm-home-main .dm-band--grey,
.dm-home-main .dm-band--warm {
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}
.dm-home-main .dm-band--grey {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0)),
    var(--band-grey);
}
.dm-home-main .dm-band--warm {
  background:
    linear-gradient(180deg, rgba(92, 61, 30, 0.03), rgba(92, 61, 30, 0)),
    var(--band-warm);
}
.dm-home-main .dm-band--tan {
  background:
    linear-gradient(180deg, rgba(92, 61, 30, 0.03), rgba(92, 61, 30, 0)),
    var(--band-tan);
}
.dm-band--cream {
  box-shadow: inset 0 -1px 0 rgba(92, 61, 30, 0.06);
}
.dm-band--subnav {
  padding: 1rem 0 1.25rem;
}
.dm-band-inner {
  padding-left: clamp(0.75rem, 2vw, 1.5rem);
  padding-right: clamp(0.75rem, 2vw, 1.5rem);
  max-width: 100%;
}
.dm-home-split {
  padding-top: 1.25rem;
}
.dm-home-aside {
  padding-top: 2rem;
}
.dm-band-inner .dm-section {
  margin-top: 0;
}
.dm-band-inner .dm-spotlights {
  padding-top: 0;
}
.sidebar-social {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--border);
}
.sidebar-social .social-icons {
  justify-content: flex-start;
  margin-top: 0;
}

.container,
.site-main {
  max-width: var(--content-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

/* Header: full bar, aligned with wide content */
.header {
  border-bottom: 1px solid var(--border);
  backdrop-filter: saturate(140%) blur(8px);
  background: color-mix(in oklab, var(--theme) 92%, var(--band-grey));
}
:root[data-theme="dark"] .header {
  background: color-mix(in oklab, var(--theme) 94%, #000);
}

/* Shared “cards” */
.box {
  background: var(--entry);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow-soft);
}
.dm-hero,
.dm-section,
.sidebar-profile,
.sidebar-section {
  outline: 1px solid rgba(92, 61, 30, 0.05);
  outline-offset: -1px;
}

/* Hero */
.dm-hero {
  padding: 2rem 2rem 1.75rem;
  position: relative;
  overflow: hidden;
}
.dm-hero::after {
  content: "";
  position: absolute;
  inset: -40% -20% auto auto;
  width: 55%;
  height: 140%;
  background: radial-gradient(circle at 30% 30%, rgba(92, 61, 30, 0.12), transparent 60%);
  pointer-events: none;
}
.dm-kicker {
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--secondary);
  margin: 0 0 0.5rem;
}
.dm-hero-title {
  font-size: clamp(2.1rem, 3.6vw, 3rem);
  line-height: 1.05;
  margin: 0 0 0.75rem;
  color: var(--primary);
}
.dm-hero-lead {
  font-size: 1.12rem;
  line-height: 1.55;
  color: var(--secondary);
  max-width: 62ch;
  margin: 0 0 1.25rem;
}
.dm-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1rem;
}
.dm-hero-math {
  margin-top: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--border);
  color: var(--secondary);
  font-size: 1.05rem;
}
.dm-hero-math .katex {
  font-size: 1.1em;
}

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  border-radius: 999px;
  padding: 0.55rem 1rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.button-primary {
  background: var(--accent);
  color: #fffdf8;
  box-shadow: 0 10px 22px rgba(92, 61, 30, 0.22);
}
.button-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(92, 61, 30, 0.28);
}
.button-ghost {
  background: transparent;
  color: var(--primary);
  border-color: var(--border);
}
.button-ghost:hover {
  border-color: rgba(92, 61, 30, 0.35);
  transform: translateY(-1px);
}

:root[data-theme="dark"] .button-primary {
  color: #14110e;
  background: var(--accent);
  box-shadow: var(--shadow-soft);
}

/* Section headers */
.dm-section {
  padding: 1.5rem 1.5rem 1.25rem;
  margin-top: 1.25rem;
}
.dm-section-head {
  margin-bottom: 1.15rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid rgba(92, 61, 30, 0.14);
}
.dm-section-title {
  font-size: 1.65rem;
  margin: 0 0 0.35rem;
  color: var(--primary);
  line-height: 1.1;
}
.dm-section-sub {
  margin: 0;
  color: var(--secondary);
  line-height: 1.55;
  max-width: 70ch;
}
.dm-section-foot {
  margin-top: 1rem;
  display: flex;
  justify-content: flex-end;
}

/* Pillars grid (DeepMind-like discovery cards, but warm paper) */
.dm-pillar-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
@media (max-width: 900px) {
  .dm-pillar-grid {
    grid-template-columns: 1fr;
  }
}
.dm-pillar-card {
  display: block;
  text-decoration: none;
  color: inherit;
  border-radius: calc(var(--card-radius) - 2px);
  border: 1px solid var(--border);
  padding: 1.1rem 1.1rem 1rem;
  background: linear-gradient(180deg, rgba(255, 253, 248, 0.75), rgba(255, 253, 248, 0.35));
  box-shadow: var(--shadow-soft);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  min-height: 170px;
  position: relative;
}
:root[data-theme="dark"] .dm-pillar-card {
  background: linear-gradient(180deg, rgba(46, 46, 51, 0.65), rgba(46, 46, 51, 0.25));
}
.dm-pillar-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: rgba(92, 61, 30, 0.28);
}
.dm-pillar-label {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--accent-2);
  margin-bottom: 0.35rem;
}
.dm-pillar-title {
  font-size: 1.35rem;
  margin: 0 0 0.4rem;
  color: var(--primary);
}
.dm-pillar-desc {
  margin: 0;
  color: var(--secondary);
  line-height: 1.45;
  font-size: 1rem;
}
.dm-pillar-cta {
  display: inline-block;
  margin-top: 0.85rem;
  font-weight: 700;
  color: var(--accent);
}

/* Home profile */
.home-info--profile {
  margin-top: 1.25rem;
  padding: 1.25rem 1.5rem;
}
.home-profile-title {
  font-size: 2rem;
  margin: 0 0 0.5rem;
}

/* Post lists */
.dm-post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}
.dm-post-card {
  border-radius: var(--card-radius);
}
.dm-excerpt {
  margin: 0.35rem 0 0;
  color: var(--secondary);
  line-height: 1.45;
  font-size: 0.98rem;
}
.dm-archive-empty,
.recent-list-note {
  grid-column: 1 / -1;
  margin: 0;
  padding: 1rem 1.25rem;
  border-radius: var(--card-radius);
  border: 1px dashed var(--border);
  background: color-mix(in oklab, var(--entry) 88%, var(--band-grey));
  color: var(--secondary);
  line-height: 1.5;
  font-size: 0.98rem;
}
.recent-list-note {
  list-style: none;
}
.recent-list-note a {
  font-weight: 600;
}
.post-card {
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  background: linear-gradient(180deg, rgba(255, 253, 248, 0.95), rgba(255, 253, 248, 0.8));
}
.small-card {
  padding: 0.95rem;
}
.meta {
  color: var(--secondary);
  font-size: 0.92rem;
}

/* Sidebar */
.sidebar-profile,
.sidebar-section {
  margin-bottom: 1rem;
  padding: 1rem;
  background: linear-gradient(180deg, rgba(255, 253, 248, 0.96), rgba(255, 253, 248, 0.82));
}
.profile-card {
  text-align: left;
}
.profile-name {
  margin: 0 0 0.35rem;
  font-size: 1.35rem;
}
.profile-bio {
  margin: 0;
  color: var(--secondary);
}
.sidebar-section .section-title,
.sidebar-profile .profile-name {
  padding-bottom: 0.45rem;
  border-bottom: 1px solid rgba(92, 61, 30, 0.14);
}

/* Article typography + math */
.post-content p {
  line-height: 1.65;
}
.post-content h2,
.post-content h3 {
  margin-top: 1.6rem;
}
.post-content .katex-display {
  margin: 1.15rem 0;
  padding: 0.85rem 0.75rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(92, 61, 30, 0.04);
  overflow-x: auto;
}
:root[data-theme="dark"] .post-content .katex-display {
  background: rgba(224, 194, 154, 0.06);
}
.post-content .katex {
  font-size: 1.05em;
}

/* Code */
code {
  background: var(--code-bg);
  padding: 0.15rem 0.35rem;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.92em;
}
pre code {
  display: block;
  padding: 1rem;
  overflow: auto;
  border-radius: 12px;
}

/* Figures & video */
.pm-figure {
  margin: 1.25rem 0;
}
.pm-figure img {
  border-radius: 12px;
  box-shadow: var(--shadow-soft);
}
.pm-figure--frame img {
  outline: 1px solid var(--border);
  outline-offset: 3px;
}
.figure-caption,
.video-caption {
  font-size: 0.98rem;
  color: var(--secondary);
  margin-top: 0.55rem;
  text-align: center;
}

.pm-video {
  margin: 1.25rem 0;
}
.pm-video-frame {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  background: #000;
}
.responsive-video {
  width: 100%;
  height: auto;
  display: block;
}
.pm-video--wide .pm-video-frame {
  max-width: 100%;
}

/* Responsive embeds */
.pm-embed {
  margin: 1.25rem 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  background: #000;
  aspect-ratio: 16 / 9;
}
.pm-embed iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

/* Callouts (shortcode) */
.callout {
  margin: 1.15rem 0;
  padding: 1rem 1.05rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(47, 107, 79, 0.06);
}
.callout-title {
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--primary);
}
.callout-body > :first-child {
  margin-top: 0;
}
.callout-body > :last-child {
  margin-bottom: 0;
}
.callout-tip {
  background: rgba(47, 107, 79, 0.08);
}
.callout-warning {
  background: rgba(176, 96, 27, 0.10);
}
.callout-note {
  background: rgba(92, 61, 30, 0.06);
}

/* Article meta boxes */
.article-meta {
  border-radius: 12px;
}

/* Category tree partial: align with theme vars */
.nav-tree {
  border-radius: 12px;
}

/* Links */
a {
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

/* Anchor offset for sticky header + subnav */
#home-hero,
#spotlights,
#pillars,
#site-profile,
#latest {
  scroll-margin-top: 6.5rem;
}

/* Sticky in-page navigation */
.dm-subnav-wrap {
  position: sticky;
  top: 0.5rem;
  z-index: 40;
  margin: 0 0 1.15rem;
}
.dm-subnav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
  padding: 0.45rem 0.55rem;
  border-radius: 999px;
  box-shadow: var(--shadow-soft);
  background: color-mix(in oklab, var(--entry) 88%, var(--band-cream));
  backdrop-filter: blur(10px) saturate(140%);
  border: 1px solid rgba(92, 61, 30, 0.1);
}
.dm-subnav-link {
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--secondary);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}
.dm-subnav-link:hover {
  color: var(--primary);
  background: rgba(92, 61, 30, 0.06);
  border-color: var(--border);
}
.dm-subnav-link.is-active {
  color: var(--primary);
  background: rgba(47, 107, 79, 0.12);
  border-color: rgba(47, 107, 79, 0.25);
}
:root[data-theme="dark"] .dm-subnav-link.is-active {
  background: rgba(123, 212, 167, 0.12);
  border-color: rgba(123, 212, 167, 0.22);
}

/* Spotlight / “breakthroughs” carousel */
.dm-spotlights-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.dm-carousel-tools {
  display: flex;
  gap: 0.35rem;
}
.dm-carousel-btn {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--entry);
  color: var(--primary);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
}
.dm-carousel-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-soft);
  border-color: rgba(92, 61, 30, 0.28);
}
.dm-carousel {
  outline: none;
}
.dm-carousel:focus-visible {
  box-shadow: 0 0 0 3px rgba(47, 107, 79, 0.35);
  border-radius: 16px;
}
.dm-carousel-track {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: stretch;
  gap: 1rem;
  overflow-x: auto;
  padding: 0.25rem 0.15rem 0.65rem;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}
.dm-carousel-slide {
  flex: 0 0 min(420px, 86vw);
  scroll-snap-align: start;
}
.dm-carousel-card {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 0;
  min-height: 132px;
  text-decoration: none;
  color: inherit;
  border-radius: calc(var(--card-radius) - 2px);
  border: 1px solid var(--border);
  overflow: hidden;
  background: linear-gradient(180deg, rgba(255, 253, 248, 0.9), rgba(255, 253, 248, 0.45));
  box-shadow: var(--shadow-soft);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
:root[data-theme="dark"] .dm-carousel-card {
  background: linear-gradient(180deg, rgba(46, 46, 51, 0.85), rgba(46, 46, 51, 0.35));
}
.dm-carousel-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: rgba(92, 61, 30, 0.28);
}
.dm-carousel-media {
  background: rgba(92, 61, 30, 0.08);
  min-height: 100%;
}
.dm-carousel-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.dm-carousel-media--placeholder {
  background: linear-gradient(145deg, rgba(92, 61, 30, 0.12), rgba(47, 107, 79, 0.12));
  min-height: 132px;
}
.dm-carousel-body {
  padding: 0.85rem 1rem 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.dm-carousel-kicker {
  font-size: 0.68rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--accent-2);
}
.dm-carousel-title {
  font-size: 1.2rem;
  margin: 0;
  line-height: 1.2;
  color: var(--primary);
}
.dm-carousel-desc {
  margin: 0.15rem 0 0;
  font-size: 0.95rem;
  color: var(--secondary);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.dm-carousel-cta {
  margin-top: auto;
  padding-top: 0.45rem;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--accent);
}
.dm-carousel-hint {
  margin: 0.15rem 0 0;
  font-size: 0.8rem;
  color: var(--secondary);
  text-align: right;
}
.dm-carousel-hint-inner {
  opacity: 0.85;
}
@media (max-width: 520px) {
  .dm-carousel-card {
    grid-template-columns: 1fr;
  }
  .dm-carousel-media,
  .dm-carousel-media--placeholder {
    min-height: 120px;
  }
}


/* Pillar cards: subtle moving sheen (honors prefers-reduced-motion) */
@media (prefers-reduced-motion: no-preference) {
  .dm-pillar-card {
    position: relative;
    overflow: hidden;
  }
  .dm-pillar-card::before {
    content: "";
    position: absolute;
    inset: -45%;
    background: radial-gradient(circle at 30% 30%, rgba(92, 61, 30, 0.14), transparent 42%),
      radial-gradient(circle at 72% 64%, rgba(47, 107, 79, 0.12), transparent 40%);
    opacity: 0.9;
    animation: dm-pillar-sheen 14s ease-in-out infinite alternate;
    pointer-events: none;
  }
  .dm-pillar-card > * {
    position: relative;
    z-index: 1;
  }
  @keyframes dm-pillar-sheen {
    from {
      transform: translate(-1.5%, -1%) rotate(0deg);
    }
    to {
      transform: translate(1.5%, 1%) rotate(1.5deg);
    }
  }
}