:root {
  --void: oklch(17% 0.03 198);
  --void-2: oklch(22% 0.035 198);
  --ink: oklch(18% 0.025 205);
  --body: oklch(31% 0.027 203);
  --soft: oklch(55% 0.03 205);
  --paper: oklch(98% 0.004 210);
  --sheet: oklch(94% 0.011 205);
  --line: oklch(82% 0.018 205);
  --teal: oklch(54% 0.12 190);
  --teal-dark: oklch(34% 0.07 190);
  --rust: oklch(58% 0.14 38);
  --blue: oklch(67% 0.12 230);
  --gold: oklch(78% 0.12 86);
  --white: #fff;
  --max: 1180px;
  --radius: 8px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-padding-top: 84px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--void);
  color: var(--ink);
  font-family: "Source Sans 3", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.58;
}

a {
  color: inherit;
}

[id] {
  scroll-margin-top: 84px;
}

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

button,
input,
textarea {
  font: inherit;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 60;
  transform: translateY(-140%);
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--gold);
  color: var(--ink);
  font-weight: 800;
  transition: transform 180ms var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: color-mix(in oklch, var(--void) 86%, transparent);
  border-bottom: 1px solid color-mix(in oklch, var(--white) 16%, transparent);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid color-mix(in oklch, var(--teal) 48%, var(--white));
  border-radius: 50%;
  color: var(--gold);
  font-family: Literata, Georgia, serif;
  font-weight: 650;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.1;
}

.brand strong {
  font-weight: 800;
}

.brand small {
  color: oklch(81% 0.03 200);
  font-size: 0.78rem;
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  padding: 10px 12px;
  border-radius: 999px;
  color: oklch(84% 0.025 205);
  font-size: 0.94rem;
  font-weight: 700;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: color-mix(in oklch, var(--white) 10%, transparent);
  color: var(--white);
  outline: none;
}

.site-nav .nav-cta {
  background: var(--gold);
  color: var(--ink);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid color-mix(in oklch, var(--white) 24%, transparent);
  border-radius: 50%;
  background: transparent;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--white);
}

.hero {
  position: relative;
  min-height: 810px;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 76% 30%, color-mix(in oklch, var(--teal) 22%, transparent), transparent 34%),
    linear-gradient(115deg, var(--void) 0%, var(--void) 45%, oklch(23% 0.037 206) 100%);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 32%;
  background: linear-gradient(0deg, var(--sheet), transparent);
  z-index: -1;
}

.hero-portrait {
  position: absolute;
  inset: 0 0 0 auto;
  width: min(48vw, 680px);
  background:
    linear-gradient(90deg, var(--void), color-mix(in oklch, var(--void) 48%, transparent) 26%, transparent 54%),
    linear-gradient(0deg, color-mix(in oklch, var(--void) 52%, transparent), transparent 44%),
    url("assets/stal-official-portrait.jpg") center top / cover no-repeat;
  z-index: -2;
}

.hero-content {
  width: min(var(--max), calc(100% - 40px));
  min-height: 720px;
  margin: 0 auto;
  padding: clamp(88px, 12vw, 152px) 0 160px;
  color: var(--white);
}

.hero-kicker,
.section-note,
.board-label,
.paper-meta,
.photo-panel figcaption {
  margin: 0;
  font-weight: 800;
}

.hero-kicker {
  max-width: max-content;
  margin-bottom: 28px;
  padding: 8px 12px;
  border: 1px solid color-mix(in oklch, var(--teal) 54%, var(--white));
  border-radius: 999px;
  color: oklch(90% 0.045 190);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

h1,
h2 {
  font-family: Literata, Georgia, serif;
  font-weight: 650;
  letter-spacing: -0.025em;
}

h1 {
  max-width: 830px;
  margin-bottom: 26px;
  font-size: clamp(3rem, 8vw, 5.65rem);
  line-height: 0.96;
}

h2 {
  margin-bottom: 22px;
  font-size: clamp(2.15rem, 5vw, 4.6rem);
  line-height: 1;
}

h3 {
  margin-bottom: 10px;
  font-size: clamp(1.22rem, 1.5vw, 1.48rem);
  line-height: 1.15;
}

.hero-lede {
  max-width: 690px;
  color: oklch(88% 0.025 205);
  font-size: clamp(1.18rem, 2vw, 1.45rem);
}

.hero-actions,
.paper-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  margin-top: 34px;
}

.button,
.filter-button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
  transition: transform 180ms var(--ease), background 180ms var(--ease), color 180ms var(--ease);
}

.button:hover,
.filter-button:hover {
  transform: translateY(-1px);
}

.button.primary {
  background: var(--gold);
  color: var(--ink);
}

.button.secondary {
  border-color: color-mix(in oklch, var(--white) 28%, transparent);
  color: var(--white);
}

.proof-rail {
  position: absolute;
  left: 50%;
  bottom: 44px;
  display: flex;
  width: min(var(--max), calc(100% - 40px));
  flex-wrap: wrap;
  gap: 10px;
  transform: translateX(-50%);
}

.proof-rail span {
  padding: 9px 12px;
  border-radius: 999px;
  background: color-mix(in oklch, var(--paper) 94%, transparent);
  color: var(--teal-dark);
  font-weight: 800;
}

.opening-statement {
  padding: clamp(42px, 8vw, 90px) max(20px, calc((100vw - var(--max)) / 2));
  background: var(--sheet);
}

.opening-statement p {
  max-width: 980px;
  margin: 0;
  color: var(--ink);
  font-family: Literata, Georgia, serif;
  font-size: clamp(1.45rem, 3vw, 2.55rem);
  font-weight: 500;
  line-height: 1.14;
}

.section {
  padding: clamp(76px, 10vw, 128px) max(20px, calc((100vw - var(--max)) / 2));
  background: var(--paper);
}

.section-copy {
  max-width: 820px;
}

.section-note {
  margin-bottom: 16px;
  color: var(--rust);
  font-size: 1rem;
}

.stance-section {
  background: var(--paper);
}

.stance-board {
  display: grid;
  grid-template-columns: 0.9fr 1.15fr 0.95fr;
  margin-top: 44px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.stance-board article {
  min-height: 310px;
  padding: clamp(24px, 4vw, 38px);
  border-right: 1px solid var(--line);
}

.stance-board article:last-child {
  border-right: 0;
}

.stance-board article:nth-child(2) {
  background: var(--void);
  color: var(--white);
}

.stance-board article:nth-child(2) p:not(.board-label) {
  color: oklch(86% 0.024 205);
}

.board-label {
  margin-bottom: 58px;
  color: var(--rust);
}

.stance-board p:not(.board-label),
.practice-copy p,
.bridge-list p,
.education-copy p,
.paper-card p,
.timeline p,
.contact-section p,
.site-footer p {
  color: var(--body);
}

.practice-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1fr);
  gap: clamp(34px, 6vw, 84px);
  align-items: center;
  background: var(--sheet);
}

.practice-image {
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--void);
}

.practice-image img {
  width: 100%;
  height: min(780px, 72vw);
  object-fit: cover;
  object-position: 43% 40%;
}

.practice-copy {
  max-width: 720px;
}

.practice-copy p,
.education-copy p {
  font-size: clamp(1.08rem, 1.7vw, 1.28rem);
}

.bridge-section {
  background: var(--void);
  color: var(--white);
}

.bridge-copy {
  max-width: 780px;
}

.bridge-copy .section-note {
  color: var(--gold);
}

.bridge-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 44px;
  background: color-mix(in oklch, var(--white) 16%, transparent);
}

.bridge-list div {
  padding: clamp(24px, 4vw, 38px);
  background: var(--void);
}

.bridge-list strong {
  display: block;
  margin-bottom: 14px;
  color: var(--gold);
  font-size: 1.2rem;
}

.bridge-list p {
  margin-bottom: 0;
  color: oklch(86% 0.024 205);
}

.photo-band {
  display: grid;
  grid-template-columns: minmax(260px, 0.82fr) minmax(260px, 1.18fr);
  gap: 16px;
  padding: 16px;
  background: var(--void);
}

.photo-panel {
  position: relative;
  min-height: 520px;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--void-2);
}

.photo-panel.wide {
  min-height: 520px;
}

.photo-panel img {
  width: 100%;
  height: 100%;
  min-height: inherit;
  object-fit: cover;
  filter: saturate(0.95) contrast(1.03);
}

.photo-panel:first-child img {
  object-position: 54% 38%;
}

.photo-panel.wide img {
  object-position: 50% 18%;
}

.photo-panel::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 45%;
  background: linear-gradient(0deg, color-mix(in oklch, var(--void) 82%, transparent), transparent);
}

.photo-panel figcaption {
  position: absolute;
  right: 20px;
  bottom: 18px;
  left: 20px;
  z-index: 1;
  color: var(--white);
  font-size: clamp(1.15rem, 2.2vw, 1.55rem);
}

.education-section {
  display: grid;
  grid-template-columns: 0.84fr 1.16fr;
  gap: clamp(34px, 6vw, 84px);
  background: var(--paper);
}

.education-copy {
  max-width: 760px;
}

.articles-section {
  background: var(--sheet);
}

.articles-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 330px);
  gap: 36px;
  align-items: end;
}

.articles-head p {
  max-width: 760px;
  color: var(--body);
}

.profile-links {
  display: grid;
  gap: 8px;
}

.profile-links a {
  display: flex;
  justify-content: space-between;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  color: var(--teal-dark);
  font-weight: 800;
  text-decoration: none;
}

.profile-links a::after {
  content: "->";
}

.paper-controls {
  margin-top: 42px;
}

.filter-button {
  background: transparent;
  border-color: var(--line);
  color: var(--teal-dark);
}

.filter-button.active {
  background: var(--void);
  border-color: var(--void);
  color: var(--white);
}

.papers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.paper-card {
  display: flex;
  min-height: 385px;
  flex-direction: column;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.paper-card.is-hidden {
  display: none;
}

.priority-paper {
  background: oklch(94% 0.026 195);
  border-color: color-mix(in oklch, var(--teal) 46%, var(--line));
}

.paper-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
  color: var(--teal-dark);
  font-size: 0.88rem;
}

.paper-meta span {
  padding: 5px 9px;
  border-radius: 999px;
  background: oklch(90% 0.026 196);
}

.paper-card h3 {
  font-family: Literata, Georgia, serif;
  font-size: 1.35rem;
}

.paper-card p {
  margin-bottom: 14px;
  font-size: 0.98rem;
}

.research-note {
  margin: 6px 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in oklch, var(--sheet) 72%, var(--paper));
}

.research-note summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  color: var(--teal-dark);
  font-weight: 900;
  cursor: pointer;
  list-style: none;
}

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

.research-note summary::after {
  content: "+";
  display: inline-grid;
  width: 24px;
  height: 24px;
  flex: 0 0 24px;
  place-items: center;
  border-radius: 999px;
  background: oklch(90% 0.026 196);
  color: var(--teal-dark);
}

.research-note[open] summary::after {
  content: "-";
}

.research-note p {
  margin: 0;
  padding: 0 12px 12px;
  color: var(--body);
  font-size: 0.94rem;
}

.paper-card a {
  margin-top: auto;
  color: var(--teal-dark);
  font-weight: 900;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.training-section {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: clamp(34px, 6vw, 84px);
  background: var(--paper);
}

.timeline {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.timeline li {
  display: grid;
  grid-template-columns: 120px 230px minmax(0, 1fr);
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.timeline span {
  color: var(--rust);
  font-weight: 900;
}

.timeline strong {
  line-height: 1.2;
}

.timeline p {
  margin-bottom: 0;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.75fr);
  gap: clamp(34px, 6vw, 76px);
  padding: clamp(58px, 9vw, 116px) max(20px, calc((100vw - var(--max)) / 2));
  background: oklch(12% 0.03 205);
  color: var(--white);
}

.contact-section h2 {
  max-width: 760px;
}

.contact-section .section-note {
  color: var(--gold);
}

.contact-section p {
  max-width: 690px;
  color: oklch(82% 0.024 205);
}

.contact-form {
  display: grid;
  gap: 14px;
}

.contact-form label {
  display: grid;
  gap: 7px;
  color: oklch(88% 0.024 205);
  font-weight: 800;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid color-mix(in oklch, var(--white) 24%, transparent);
  border-radius: var(--radius);
  padding: 13px 14px;
  background: color-mix(in oklch, var(--white) 8%, transparent);
  color: var(--white);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: oklch(77% 0.02 205);
  opacity: 1;
}

.contact-form .button {
  justify-self: start;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  padding: 26px clamp(20px, 4vw, 56px);
  background: oklch(10% 0.025 205);
  color: oklch(80% 0.022 205);
}

.site-footer p {
  max-width: 680px;
  margin: 0;
  font-size: 0.92rem;
}

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

@media (max-width: 980px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    right: 18px;
    left: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    border: 1px solid color-mix(in oklch, var(--white) 20%, transparent);
    border-radius: var(--radius);
    background: var(--void);
  }

  .site-nav.is-open {
    display: flex;
  }

  .hero {
    min-height: auto;
  }

  .hero-portrait {
    width: 100%;
    opacity: 0.32;
    background-position: 72% top;
  }

  .hero-content {
    min-height: auto;
    padding-bottom: 190px;
  }

  .proof-rail {
    bottom: 34px;
  }

  .stance-board,
  .practice-section,
  .bridge-list,
  .photo-band,
  .education-section,
  .articles-head,
  .training-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .stance-board article {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .stance-board article:last-child {
    border-bottom: 0;
  }

  .practice-image img,
  .photo-panel,
  .photo-panel.wide {
    height: auto;
    min-height: 460px;
  }

  .timeline li {
    grid-template-columns: 100px minmax(0, 1fr);
  }

  .timeline li p {
    grid-column: 2;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .site-header {
    padding: 12px 14px;
  }

  .hero-content,
  .proof-rail {
    width: min(100% - 28px, var(--max));
  }

  .hero-content {
    padding-top: 76px;
  }

  h1 {
    font-size: clamp(2.65rem, 13.5vw, 4.3rem);
  }

  h2 {
    font-size: clamp(2rem, 11vw, 3.2rem);
  }

  .opening-statement {
    padding-right: 14px;
    padding-left: 14px;
  }

  .section,
  .contact-section {
    padding-right: 14px;
    padding-left: 14px;
  }

  .proof-rail span {
    font-size: 0.9rem;
  }

  .stance-board article,
  .bridge-list div,
  .paper-card {
    padding: 20px;
  }

  .photo-band {
    padding: 10px;
  }

  .photo-panel,
  .photo-panel.wide {
    min-height: 390px;
  }

  .timeline li {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .timeline li p {
    grid-column: auto;
  }
}