/* ==========================================================================
   Tokens
   ========================================================================== */

:root {
  --ff-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, sans-serif;
  --ff-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --page: 50rem;
  --gap: clamp(1.25rem, 5vw, 2rem);
  --band: clamp(3.5rem, 9vw, 6rem);
  --radius: 14px;
}

[data-theme="dark"] {
  --bg: #0a0a0b;
  --bg-soft: #121214;
  --fg: #eceae7;
  --fg-2: #aaa7a0;
  --fg-3: #8b867d;
  --line: #232326;
  --line-2: #35363c;
  --accent: #f2a65a;
  --accent-wash: rgba(242, 166, 90, 0.13);
  --shadow: 0 20px 50px -24px rgba(0, 0, 0, 0.9);
  --grain: 0.04;
  --photo-tone: grayscale(0.2) contrast(1.02);
  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #fbfaf8;
  --bg-soft: #ffffff;
  --fg: #17171a;
  --fg-2: #55544d;
  --fg-3: #6e6b64;
  --line: #e7e4dd;
  --line-2: #d6d2c9;
  --accent: #b0621a;
  --accent-wash: rgba(176, 98, 26, 0.09);
  --shadow: 0 20px 44px -28px rgba(24, 18, 8, 0.3);
  --grain: 0;
  --photo-tone: none;
  color-scheme: light;
}

/* ==========================================================================
   Base
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--ff-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  font-feature-settings: "cv05" 1, "ss01" 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Film grain, dark theme only. */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 99;
  pointer-events: none;
  opacity: var(--grain);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

p {
  margin: 0 0 1rem;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

::selection {
  background: var(--accent-wash);
  color: var(--fg);
}

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

/* Prose links: hairline underline that warms up on hover. */
a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--line-2);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

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

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 0.7rem 1rem;
  background: var(--bg-soft);
  border: 1px solid var(--line-2);
  border-radius: 8px;
  text-decoration: none;
  font-family: var(--ff-mono);
  font-size: 0.8rem;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 100;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.wrap {
  width: min(100% - (var(--gap) * 2), var(--page));
  margin-inline: auto;
}

.band {
  padding-block: var(--band);
}

.eyebrow,
.label,
.card-kind,
.card-period,
.paper-meta,
.update-date,
.chips,
.hero-links,
.card-links,
.paper-links,
.more summary,
.foot-links {
  font-family: var(--ff-mono);
  font-size: 0.78rem;
  letter-spacing: 0.01em;
}

.label {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin-bottom: 2.25rem;
  color: var(--fg-3);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.label::before {
  content: "";
  width: 1.1rem;
  height: 1px;
  background: var(--accent);
}

.label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.note {
  margin: -1.25rem 0 2rem;
  max-width: 40rem;
  color: var(--fg-2);
  font-size: 0.95rem;
}

.quiet {
  color: var(--fg-2);
  font-size: 0.95rem;
}

/* ==========================================================================
   Top bar
   ========================================================================== */

.bar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid transparent;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.3) blur(12px);
  transition: border-color 0.25s ease;
}

.bar.is-scrolled {
  border-bottom-color: var(--line);
}

.bar-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  width: min(100% - (var(--gap) * 2), var(--page));
  height: 3.5rem;
  margin-inline: auto;
}

.bar-name {
  margin-right: auto;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.bar-nav {
  display: flex;
  gap: 1.4rem;
  font-family: var(--ff-mono);
  font-size: 0.78rem;
}

.bar-nav a {
  color: var(--fg-2);
  text-decoration: none;
}

.bar-nav a:hover {
  color: var(--accent);
}

.theme {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--fg-2);
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.theme:hover {
  color: var(--accent);
  border-color: var(--line-2);
}

.theme svg {
  width: 1rem;
  height: 1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
}

[data-theme="dark"] .theme-moon,
[data-theme="light"] .theme-sun {
  display: none;
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  padding-block: clamp(2.5rem, 9vw, 5rem) 0;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -30% 0 auto -10%;
  height: 34rem;
  background: radial-gradient(45% 50% at 30% 45%, var(--accent-wash), transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 13rem;
  gap: clamp(1.5rem, 5vw, 3.5rem);
  align-items: start;
}

.eyebrow {
  margin-bottom: 1.1rem;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
}

.hero h1 {
  margin-bottom: 1.25rem;
  font-size: clamp(2.75rem, 8vw, 4rem);
  letter-spacing: -0.035em;
  line-height: 1;
}

.lede {
  margin-bottom: 1.5rem;
  max-width: 30ch;
  color: var(--fg);
  font-size: clamp(1.25rem, 3.2vw, 1.6rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.3;
  text-wrap: balance;
}

.hero-text p {
  max-width: 40rem;
  color: var(--fg-2);
}

.hero-text .lede {
  color: var(--fg);
}

.hero-text a {
  color: var(--fg);
}

.hero-text .quiet a,
.hero-text .quiet {
  color: var(--fg-2);
}

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

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.75rem;
}

.hero-links a {
  display: block;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  color: var(--fg-2);
  text-decoration: none;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease, transform 0.15s ease;
}

.hero-links a:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  background: var(--accent-wash);
  color: var(--accent);
}

.hero-links li:first-child a {
  border-color: var(--accent);
  color: var(--accent);
}

.hero-photo {
  margin: 0;
}

.hero-photo img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: 50% 40%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  filter: var(--photo-tone);
  transition: filter 0.4s ease, transform 0.4s ease;
}

.hero-photo img:hover {
  filter: none;
  transform: translateY(-2px);
}

/* ==========================================================================
   Work cards
   ========================================================================== */

.cards {
  display: grid;
  gap: 1rem;
}

.card {
  position: relative;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--bg-soft), transparent 70%);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--line-2);
  box-shadow: var(--shadow);
}

.card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 0.75rem;
  margin-bottom: 0.9rem;
}

.card-head h3 {
  font-size: 1.2rem;
}

.card-kind {
  margin: 0;
  color: var(--fg-3);
}

.card-period {
  margin: 0 0 0 auto;
  color: var(--fg-3);
  white-space: nowrap;
}

.card-body {
  max-width: 44rem;
  margin-bottom: 1.1rem;
  color: var(--fg-2);
  font-size: 0.97rem;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.1rem;
}

.chips li {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.28rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--fg-2);
  font-size: 0.72rem;
}

.chips li::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
}

.card-links,
.paper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.1rem;
}

.card-links a,
.paper-links a {
  color: var(--fg-2);
  text-decoration: none;
  border-bottom: 1px solid var(--line-2);
  padding-bottom: 1px;
}

.card-links a::after,
.paper-links a::after {
  content: " ↗";
  color: var(--fg-3);
}

.card-links a:hover,
.paper-links a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.card-links a:hover::after,
.paper-links a:hover::after {
  color: var(--accent);
}

/* ==========================================================================
   Papers
   ========================================================================== */

.paper {
  padding-block: 1.5rem;
  border-top: 1px solid var(--line);
}

.papers > .paper:first-child {
  border-top: none;
  padding-top: 0;
}

.paper-title {
  margin-bottom: 0.5rem;
  max-width: 46rem;
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.4;
}

.paper-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.5rem;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.7rem;
}

.tag {
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  background: var(--accent-wash);
  color: var(--accent);
  letter-spacing: 0.08em;
}

.paper-authors {
  margin: 0 0 0.5rem;
  max-width: 46rem;
  color: var(--fg-3);
  font-size: 0.87rem;
  line-height: 1.55;
}

.paper-authors strong {
  color: var(--fg-2);
  font-weight: 500;
}

.paper-summary {
  max-width: 42rem;
  margin: 0 0 0.7rem;
  color: var(--fg-2);
  font-size: 0.95rem;
}

.papers-compact .paper-title {
  font-size: 0.98rem;
}

.more {
  margin-top: 2rem;
}

.more summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--fg-2);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  cursor: pointer;
  list-style: none;
  transition: color 0.15s ease;
}

.more summary::-webkit-details-marker {
  display: none;
}

.more summary::after {
  content: "+";
  font-size: 1rem;
  color: var(--fg-3);
}

.more[open] summary::after {
  content: "–";
}

.more summary:hover {
  color: var(--accent);
}

.more[open] summary {
  border-bottom-color: transparent;
}

/* ==========================================================================
   Updates
   ========================================================================== */

.update {
  display: grid;
  grid-template-columns: 6rem minmax(0, 1fr);
  gap: 0.25rem 1.5rem;
  padding-block: 1.1rem;
  border-top: 1px solid var(--line);
}

.updates > .update:first-child {
  border-top: none;
  padding-top: 0;
}

.update-date {
  margin: 0;
  padding-top: 0.15rem;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.72rem;
  white-space: nowrap;
}

.update-text {
  margin: 0;
  max-width: 40rem;
  color: var(--fg-2);
  font-size: 0.95rem;
}

.update-text a {
  color: var(--fg);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.foot {
  margin-top: var(--band);
  border-top: 1px solid var(--line);
  padding-block: 2rem 3rem;
}

.foot-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.foot-name {
  margin: 0;
  color: var(--fg-3);
  font-size: 0.9rem;
}

.foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.2rem;
}

.foot-links a {
  color: var(--fg-3);
  text-decoration: none;
}

.foot-links a:hover {
  color: var(--accent);
}

/* ==========================================================================
   Motion
   ========================================================================== */

@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) and (min-width: 48rem) {
    .reveal {
      animation: rise linear both;
      animation-timeline: view();
      animation-range: entry 5% cover 22%;
    }
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation: none !important;
  }
}

/* ==========================================================================
   Narrow screens
   ========================================================================== */

@media (max-width: 46rem) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-photo {
    order: -1;
    width: 5.5rem;
  }

  .hero-photo img {
    aspect-ratio: 1;
    border-radius: 50%;
  }

  .bar-nav {
    display: none;
  }

  /* Two clean rows instead of one wrapping line: name | period, then kind. */
  .card-head {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.15rem 0.75rem;
  }

  .card-head h3 {
    grid-area: 1 / 1;
  }

  .card-period {
    grid-area: 1 / 2;
    margin: 0;
    align-self: baseline;
  }

  .card-kind {
    grid-area: 2 / 1 / 2 / -1;
  }

  .update {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
}