:root {
  --teal: #006599;
  --teal-dark: #004b73;
  --teal-soft: #e8f4f7;
  --text: #006599;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.55;
}

.site {
  display: flex;
  align-items: stretch;
  min-height: 100vh;
}

.sidebar {
  flex: 0 0 220px;
  width: 220px;
  min-height: 100vh;
  padding: 30px 14px 0;
  display: flex;
  flex-direction: column;
  background: var(--white);
  align-self: stretch;
}

.sidebar-logo {
  display: block;
  width: 155px;
  max-width: 100%;
  height: auto;
  margin: 0 auto 63px;
}

.nav-panel {
  flex: 1 1 auto;
  min-height: 0;
  padding: 22px 0 14px;
  display: flex;
  flex-direction: column;
  background-image:
    linear-gradient(rgba(0, 49, 73, 0.62), rgba(0, 49, 73, 0.74)),
    url("images/nav-bg.jpg");
  background-size: cover;
  background-position: center top;
}

.nav-panel a {
  display: block;
  padding: 8px 12px;
  color: var(--white);
  font-size: 1.35rem;
  line-height: 1.25;
  white-space: nowrap;
  text-decoration: none;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.80);
}


.nav-panel > a:hover,
.nav-panel > a:focus,
.nav-panel > a[aria-current="page"] {
  background: rgba(0, 101, 153, 0.70);
  outline: none;
}

.sidebar-footer {
  margin: auto 10px 0;
  padding-top: 24px;
  color: var(--white);
  font-size: 0.72rem;
  line-height: 1.35;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.85);
}

.legal-links,
.photo-credit {
  display: block;
}

.photo-credit {
  margin-top: 8px;
}

.sidebar-footer a {
  color: var(--white);
  font-size: inherit;
  padding: 0;
  display: inline;
  text-decoration: underline;
}

.content {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0 28px 36px;
}

.top-rule,
.bottom-rule {
  border: 0;
  height: 4px;
  margin: 30px 0 0;
  background: var(--teal);
}

.bottom-rule {
  margin-top: 34px;
}

.hero {
  min-height: 160px;
  display: flex;
  align-items: center;
  margin: 0;
  padding: 22px 28px;
  background-image:
    linear-gradient(90deg, rgba(0, 34, 51, 0.86), rgba(0, 34, 51, 0.56), rgba(0, 34, 51, 0.36)),
    url("images/warwick-maths-panorama.jpg");
  background-size: cover;
  background-position: center center;
}

.hero h1 {
  max-width: 1120px;
  margin: 0;
  color: var(--white);
  font-size: clamp(2rem, 4.2vw, 3.85rem);
  font-weight: 400;
  line-height: 1.04;
  text-shadow: 0 2px 5px rgba(0, 0, 0, 0.95);
}

.thin-rule {
  border: 0;
  height: 1px;
  margin: 22px 0;
  background: var(--teal);
}

main {
  max-width: 1180px;
}

.lead {
  margin: 18px 0 24px;
  font-size: 1.45rem;
  line-height: 1.35;
}

.paper {
  min-height: 410px;
  padding: 6px 0 10px;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.93), rgba(255, 255, 255, 0.96)),
    url("images/quartic.png");
  background-repeat: no-repeat;
  background-position: right 4% top 18px;
  background-size: min(44vw, 510px) auto;
}

.home-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 285px;
  gap: 22px;
  align-items: start;
}

section {
  max-width: 920px;
}

h2 {
  margin: 0.95em 0 0.35em;
  color: var(--teal-dark);
  font-size: 1.65rem;
  font-weight: 600;
}

h3 {
  margin: 1.1em 0 0.35em;
  color: var(--teal-dark);
  font-size: 1.22rem;
}

p {
  margin: 0.75em 0;
}

.organizers {
  font-size: 1.14rem;
  line-height: 1.45;
}

.organizers a {
  font-weight: 600;
}

.contact-button {
  display: inline-block;
  margin-top: 0.15rem;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--teal);
  border-radius: 0.25rem;
  background: rgba(207, 239, 242, 0.65);
  color: var(--teal-dark);
  font-weight: 700;
  text-decoration: none;
}

.contact-button:hover,
.contact-button:focus {
  background: rgba(207, 239, 242, 0.95);
  color: var(--teal-dark);
}

.button-link {
  display: inline-block;
  margin: 0.25rem 0 0.15rem;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--teal);
  border-radius: 0.25rem;
  background: rgba(255, 255, 255, 0.78);
  color: var(--teal-dark);
  font-weight: 700;
  text-decoration: none;
}

.button-link:hover,
.button-link:focus {
  background: rgba(255, 255, 255, 0.96);
  color: var(--teal-dark);
}

.registration-links {
  margin-bottom: 0;
}

.registration-links li {
  margin-bottom: 0.85rem;
}

.registration-links p {
  margin: 0.25rem 0 0;
}

ul,
ol {
  margin-top: 0.45em;
  padding-left: 1.55em;
}

li {
  margin: 0.28em 0;
}

a {
  color: var(--teal);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover,
a:focus {
  color: var(--teal-dark);
}

.notice {
  margin: 20px 0;
  padding: 14px 18px;
  border-left: 4px solid var(--teal);
  background: var(--teal-soft);
}

.accommodation-highlight {
  border-left-width: 6px;
}

.accommodation-page {
  max-width: 900px;
}

.accommodation-page .lead,
.accommodation-page section {
  max-width: 760px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(245px, 1fr));
  gap: 14px 22px;
  margin: 18px 0;
}

.info-card {
  padding: 14px 16px;
  border: 1px solid rgba(0, 101, 153, 0.22);
  background: rgba(255, 255, 255, 0.88);
}

.info-card h3 {
  margin-top: 0;
}

.logo-box {
  padding: 16px 16px 12px;
  text-align: center;
  background: rgba(255, 255, 255, 0.92);
}

.logo-box a {
  display: block;
  margin: 0 auto 22px;
}

.logo-box img {
  max-width: 100%;
  height: auto;
}

.logo-box .oscar-logo {
  width: 230px;
  background: rgba(255, 255, 255, 0.88);
  padding: 4px;
}

.logo-box .trr-logo {
  width: 260px;
}

.logo-box p {
  margin: 0.5em 0;
  font-size: 0.95rem;
}

.footer {
  margin-top: 30px;
  font-size: 0.82rem;
  color: var(--teal-dark);
}

.footer a {
  color: var(--teal-dark);
}


@media (max-width: 980px) {
  .home-layout {
    grid-template-columns: 1fr;
  }

  .logo-box {
    max-width: 360px;
  }
}

@media (max-width: 820px) {
  .site {
    display: block;
  }

  .sidebar {
    width: auto;
    min-height: 0;
    padding: 18px 18px 12px;
    display: block;
  }

  .sidebar-logo {
    width: 120px;
    margin-bottom: 18px;
  }

  .nav-panel {
    flex: none;
    min-height: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    padding: 12px;
  }

  .nav-panel a {
    font-size: 1rem;
    padding: 8px 10px;
    white-space: normal;
  }

  .sidebar-footer {
    width: 100%;
    margin: 8px 0 0;
    padding-top: 8px;
  }

  .content {
    padding: 0 18px 28px;
  }

  .top-rule {
    margin-top: 18px;
  }

  .hero {
    min-height: 150px;
    padding: 18px;
  }

  .lead {
    font-size: 1.18rem;
  }

  .paper {
    background-size: 420px auto;
    background-position: right -140px top 30px;
  }
}


.accommodation-content {
  max-width: 760px;
}