:root {
  --bg: #f7faff;
  --surface: #ffffff;
  --surface-soft: #eef5ff;
  --surface-cool: #f4f8fb;
  --ink: #0b1736;
  --navy: #0b1f4d;
  --muted: #52627a;
  --line: #d9e4f2;
  --line-strong: #c2d2e8;
  --blue: #2458ff;
  --cyan: #009bc7;
  --violet: #6a4ff6;
  --green: #0f8a70;
  --coral: #cf4c45;
  --shadow: 0 18px 45px rgba(11, 31, 77, 0.09);
  --shadow-soft: 0 10px 26px rgba(11, 31, 77, 0.06);
  --radius: 8px;
  --max-width: 1160px;

  /* Typography quick controls: adjust these values to tune major text sizes. */
  --font-hero-eyebrow: 1.28rem;
  --font-hero-title: 4.55rem;
  --font-hero-subtitle: 1.42rem;
  --font-hero-summary: 1.28rem;
  --font-section-kicker: 1.08rem;
  --font-section-title: 2.35rem;
  --font-panel-kicker: 1.28rem;
  --font-panel-label: 0.96rem;
  --font-panel-value: 1.09rem;
  --font-body: 1rem;
  --font-card-title: 1.14rem;
  --font-presenter-name: 1.28rem;
  --font-presenter-bio: 1rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  font-size: var(--font-body);
  overflow-x: hidden;
  letter-spacing: 0;
}

body::selection {
  color: #ffffff;
  background: var(--blue);
}

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

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

button {
  font: inherit;
}

code,
pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.container {
  width: min(var(--max-width), calc(100% - 40px));
  margin: 0 auto;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 100;
  transform: translateY(-150%);
  padding: 10px 14px;
  color: #ffffff;
  background: var(--navy);
  border-radius: var(--radius);
  transition: transform 160ms ease;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(217, 228, 242, 0.9);
  backdrop-filter: blur(16px);
}

.nav-shell {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: max-content;
  color: var(--navy);
  font-weight: 800;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  color: #ffffff;
  background: linear-gradient(135deg, var(--navy), var(--blue) 52%, var(--cyan));
  border-radius: var(--radius);
  font-size: 0.82rem;
}

.brand-text {
  font-size: 0.98rem;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 2px;
  color: var(--muted);
  font-size: 0.94rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.nav-links::-webkit-scrollbar {
  display: none;
}

.nav-links a {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  padding: 0 10px;
  border-radius: var(--radius);
  white-space: nowrap;
  transition: color 160ms ease, background 160ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--blue);
  background: #eef4ff;
  outline: none;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 86px 0 76px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(238, 245, 255, 0.96) 52%, rgba(246, 243, 255, 0.96) 100%),
    linear-gradient(90deg, rgba(36, 88, 255, 0.08), rgba(0, 155, 199, 0.08));
  border-bottom: 1px solid var(--line);
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  align-items: center;
  gap: 56px;
}

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

.eyebrow,
.section-kicker,
.panel-kicker {
  margin: 0 0 12px;
  color: var(--coral);
  font-weight: 800;
  text-transform: uppercase;
}

.eyebrow {
  font-size: var(--font-hero-eyebrow);
}

.section-kicker {
  font-size: var(--font-section-kicker);
}

.panel-kicker {
  font-size: var(--font-panel-kicker);
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  color: var(--navy);
  font-size: var(--font-hero-title);
  line-height: 0.98;
  font-weight: 850;
}

h2 {
  margin: 0;
  color: var(--navy);
  font-size: var(--font-section-title);
  line-height: 1.15;
}

h3 {
  margin: 0;
  color: var(--navy);
  font-size: var(--font-card-title);
  line-height: 1.3;
}

p {
  margin: 0;
  color: var(--muted);
}

.hero-subtitle {
  margin-top: 22px;
  color: #263a65;
  font-size: var(--font-hero-subtitle);
  line-height: 1.35;
  font-weight: 650;
}

.hero-summary {
  max-width: 640px;
  margin-top: 14px;
  color: var(--muted);
  font-size: var(--font-hero-summary);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-weight: 750;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease, background 160ms ease, color 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  outline: none;
}

.button-primary {
  color: #ffffff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  box-shadow: 0 12px 28px rgba(36, 88, 255, 0.22);
}

.button-primary:hover,
.button-primary:focus-visible {
  box-shadow: 0 16px 34px rgba(36, 88, 255, 0.3);
}

.button-secondary {
  color: var(--navy);
  background: #ffffff;
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: var(--blue);
  color: var(--blue);
}

.button-ghost {
  color: var(--navy);
  background: rgba(255, 255, 255, 0.48);
}

.button-ghost:hover,
.button-ghost:focus-visible {
  border-color: var(--cyan);
  color: #007999;
}

.keyword-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-width: 700px;
  margin-top: 24px;
}

.keyword-row span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 9px;
  color: #263a65;
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 0.8rem;
  font-weight: 700;
}

.hero-panel {
  padding: 26px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(194, 210, 232, 0.9);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.snapshot-list {
  display: grid;
  gap: 16px;
  margin: 0;
}

.snapshot-list div {
  padding-bottom: 15px;
  border-bottom: 1px solid var(--line);
}

.snapshot-list div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.snapshot-list dt {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: var(--font-panel-label);
  font-weight: 700;
}

.snapshot-list dd {
  margin: 0;
  color: var(--navy);
  font-size: var(--font-panel-value);
  font-weight: 800;
}

.section {
  padding: 82px 0;
}

.section-tint {
  background: linear-gradient(180deg, #f4f8fb 0%, #f7faff 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 32px;
}

.section-heading.compact {
  margin-bottom: 22px;
}

.section-heading p:not(.section-kicker) {
  margin-top: 12px;
  font-size: 1rem;
}

.feature-card,
.material-card,
.contact-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.text-layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 52px;
}

.sticky-heading {
  position: sticky;
  top: 110px;
  align-self: start;
  margin-bottom: 0;
}

.text-block {
  display: grid;
  gap: 18px;
  padding: 30px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.text-block p {
  color: #40516c;
  font-size: 1.05rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.feature-card {
  min-height: 230px;
  padding: 24px;
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.feature-card:hover {
  transform: translateY(-3px);
  border-color: #b9ccff;
  box-shadow: 0 18px 40px rgba(36, 88, 255, 0.1);
}

.feature-card h3 {
  margin-bottom: 10px;
}

.feature-card p,
.material-card span {
  color: var(--muted);
}

.schedule-table-wrap {
  overflow-x: auto;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.schedule-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
}

.schedule-table th,
.schedule-table td {
  padding: 17px 20px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.schedule-table th {
  color: var(--navy);
  background: #eef5ff;
  font-size: 0.9rem;
}

.schedule-table td:first-child {
  width: 210px;
  color: var(--navy);
  font-weight: 800;
  white-space: nowrap;
}

.schedule-table tr:last-child td {
  border-bottom: 0;
}

.presenter-list {
  overflow: hidden;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.presenter-row {
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  padding: 26px 28px;
  border-bottom: 1px solid var(--line);
}

.presenter-row:nth-child(even) {
  background: rgba(238, 245, 255, 0.44);
}

.presenter-row:last-child {
  border-bottom: 0;
}

.presenter-photo {
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: center;
  width: 112px;
  height: 132px;
  color: #ffffff;
  border-radius: var(--radius);
  font-size: 1.28rem;
  font-weight: 850;
  box-shadow: 0 14px 30px rgba(11, 31, 77, 0.14);
}

.presenter-photo::before {
  content: attr(data-initials);
}

.presenter-photo.has-image::before {
  display: none;
}

.presenter-photo img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #ffffff;
}

.presenter-photo.is-missing img {
  display: none;
}

.presenter-info h3 {
  margin-bottom: 6px;
  font-size: var(--font-presenter-name);
}

.bio {
  max-width: 860px;
  color: var(--muted);
  font-size: var(--font-presenter-bio);
}

.avatar-blue {
  background: linear-gradient(135deg, #1746d6, #2e7cf6);
}

.avatar-cyan {
  background: linear-gradient(135deg, #007b9e, #10bcd7);
}

.avatar-violet {
  background: linear-gradient(135deg, #5142d9, #8b6bff);
}

.avatar-green {
  background: linear-gradient(135deg, #0f7568, #26b490);
}

.avatar-orange {
  background: linear-gradient(135deg, #a24a0d, #e48737);
}

.avatar-navy {
  background: linear-gradient(135deg, #0b1f4d, #274783);
}

.avatar-indigo {
  background: linear-gradient(135deg, #2433a6, #5d71f3);
}

.affiliation {
  margin-bottom: 8px;
  color: #263a65;
  font-weight: 750;
}

.homepage-placeholder {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  margin-top: 16px;
  padding: 0 10px;
  color: #66758d;
  background: #f5f8fc;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 0.86rem;
  font-weight: 800;
}

.homepage-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  margin-top: 16px;
  padding: 0 10px;
  color: var(--blue);
  background: #eef4ff;
  border: 1px solid #cbdcff;
  border-radius: var(--radius);
  font-size: 0.86rem;
  font-weight: 800;
}

.homepage-link:hover,
.homepage-link:focus-visible {
  color: #ffffff;
  background: var(--blue);
  outline: none;
}

.materials-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.material-card {
  display: grid;
  align-content: start;
  gap: 8px;
  min-height: 160px;
  padding: 22px;
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.material-card strong {
  color: var(--navy);
  font-size: 1.08rem;
}

.material-type {
  display: inline-flex;
  width: fit-content;
  min-height: 28px;
  align-items: center;
  padding: 0 9px;
  color: #ffffff;
  background: var(--navy);
  border-radius: var(--radius);
  font-size: 0.78rem;
  font-weight: 800;
}

.material-card-active:hover,
.material-card-active:focus-visible {
  transform: translateY(-3px);
  border-color: var(--blue);
  box-shadow: 0 18px 38px rgba(36, 88, 255, 0.12);
  outline: none;
}

.material-card-disabled {
  background: #f8fafc;
  opacity: 0.78;
}

.material-card-disabled .material-type {
  background: #7d8aa0;
}

.citation-heading {
  display: flex;
  max-width: none;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}

.copy-button {
  flex: 0 0 auto;
  margin-bottom: 4px;
}

.bibtex-block {
  overflow-x: auto;
  margin: 0;
  padding: 24px;
  color: #e8eefc;
  background: #101827;
  border: 1px solid #24314d;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.bibtex-block code {
  display: block;
  min-width: 720px;
  font-size: 0.92rem;
  line-height: 1.55;
}

.copy-status {
  min-height: 24px;
  margin-top: 12px;
  color: var(--green);
  font-weight: 750;
}

.copy-status.is-error {
  color: var(--coral);
}

.contact-section {
  background: #ffffff;
}

.contact-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 30px;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.contact-links a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 14px;
  color: var(--blue);
  background: #eef4ff;
  border: 1px solid #cbdcff;
  border-radius: var(--radius);
  font-weight: 800;
  word-break: break-word;
}

.contact-links a:hover,
.contact-links a:focus-visible {
  color: #ffffff;
  background: var(--blue);
  outline: none;
}

.site-footer {
  padding: 26px 0;
  color: #63728b;
  background: #f7faff;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-inner p {
  margin: 0;
}

.footer-inner a {
  color: var(--blue);
  font-weight: 800;
}

@media (max-width: 1040px) {
  h1 {
    font-size: 3.8rem;
  }

  .hero-layout,
  .text-layout {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    max-width: 560px;
  }

  .sticky-heading {
    position: static;
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .materials-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 780px) {
  html {
    scroll-padding-top: 118px;
  }

  .container {
    width: min(100% - 28px, var(--max-width));
  }

  .nav-shell {
    min-height: auto;
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding: 12px 0;
  }

  .nav-links {
    width: 100%;
    justify-content: flex-start;
    padding-bottom: 2px;
  }

  .nav-links a {
    min-height: 34px;
    padding: 0 9px;
  }

  .hero {
    padding: 56px 0 50px;
  }

  h1 {
    font-size: 3rem;
    line-height: 1.04;
  }

  h2 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.2rem;
  }

  .section {
    padding: 62px 0;
  }

  .feature-grid,
  .materials-grid {
    grid-template-columns: 1fr;
  }

  .feature-card,
  .material-card {
    min-height: auto;
  }

  .citation-heading,
  .contact-panel,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .copy-button {
    margin-bottom: 0;
  }
}

@media (max-width: 520px) {
  .brand-text {
    font-size: 0.92rem;
  }

  h1 {
    font-size: 2.45rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  .hero-actions,
  .contact-links {
    flex-direction: column;
    align-items: stretch;
  }

  .button,
  .contact-links a {
    width: 100%;
  }

  .hero-panel,
  .text-block,
  .presenter-row,
  .contact-panel {
    padding: 20px;
  }

  .presenter-row {
    grid-template-columns: 1fr;
    gap: 16px;
    align-items: start;
  }

  .presenter-photo {
    width: 96px;
    height: 112px;
  }

  .schedule-table {
    min-width: 560px;
  }

  .bibtex-block {
    padding: 18px;
  }
}