:root {
  --navy: #0a2e68;
  --ink: #12315f;
  --blue: #126ddd;
  --cyan: #35a8ed;
  --sky: #e6f6ff;
  --pale: #f7fbff;
  --line: #c9e4f5;
  --white: #ffffff;
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --sans: "Avenir Next", "Helvetica Neue", "Segoe UI", Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--pale);
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--pale);
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.55;
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--white);
  background: var(--navy);
  border-radius: 0.35rem;
  transform: translateY(-180%);
  transition: transform 0.2s ease;
}

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

.page-progress {
  position: fixed;
  z-index: 50;
  top: 0;
  right: 0;
  left: 0;
  height: 3px;
  pointer-events: none;
}

.page-progress span {
  display: block;
  width: var(--progress, 0%);
  height: 100%;
  background: var(--blue);
  transition: width 0.08s linear;
}

.site-header {
  position: sticky;
  z-index: 30;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 76px;
  padding: 0 5.5vw;
  color: var(--navy);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(10, 46, 104, 0.08);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.72rem;
  color: inherit;
  text-decoration: none;
}

.brand-seal {
  display: block;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  object-fit: contain;
  background: var(--white);
  border-radius: 50%;
}

.brand-name {
  font-family: var(--serif);
  font-size: 1rem;
  letter-spacing: 0.11em;
  line-height: 0.9;
  text-transform: uppercase;
}

.brand-name b {
  display: block;
  margin-top: 0.27rem;
  font-family: var(--sans);
  font-size: 0.53em;
  font-weight: 700;
  letter-spacing: 0.29em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.3vw, 2.2rem);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.site-nav > a {
  text-decoration: none;
}

.site-nav > a:not(.header-cta) {
  color: rgba(10, 46, 104, 0.78);
  transition: color 0.2s ease;
}

.site-nav > a:not(.header-cta):hover,
.site-nav > a:not(.header-cta):focus-visible {
  color: var(--blue);
}

.header-cta {
  display: inline-flex;
  gap: 0.6rem;
  align-items: center;
  padding: 0.72rem 1rem;
  color: var(--navy);
  background: var(--sky);
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: transform 0.2s ease, background 0.2s ease;
}

.header-cta:hover,
.header-cta:focus-visible {
  background: var(--white);
  transform: translateY(-2px);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  color: inherit;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.menu-toggle > span:not(.sr-only) {
  display: block;
  width: 27px;
  height: 2px;
  margin: 6px auto;
  background: currentColor;
  transition: transform 0.2s ease;
}

.hero {
  position: relative;
  min-height: min(740px, calc(100svh - 76px));
  overflow: hidden;
  background:
    radial-gradient(circle at 85% 22%, rgba(53, 168, 237, 0.13), transparent 22rem),
    linear-gradient(135deg, #ffffff 0%, #f0faff 62%, #d8efff 100%);
  border-bottom: 1px solid var(--line);
}

.hero-shell,
.section-shell {
  width: min(1180px, calc(100% - 64px));
  margin: auto;
}

.hero-shell {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.65fr);
  gap: clamp(3rem, 9vw, 10rem);
  align-items: center;
  min-height: 560px;
  padding: clamp(3.5rem, 6vw, 5.4rem) 0 clamp(4.5rem, 7vw, 6rem);
}

.hero-orbit {
  position: absolute;
  border: 1px solid rgba(18, 109, 221, 0.17);
  border-radius: 50%;
}

.orbit-one {
  top: -32rem;
  right: -23rem;
  width: 70rem;
  height: 70rem;
  box-shadow: 0 0 0 4.5rem rgba(53, 168, 237, 0.06), 0 0 0 9rem rgba(53, 168, 237, 0.035);
}

.orbit-two {
  bottom: -28rem;
  left: 32%;
  width: 55rem;
  height: 55rem;
  border-color: rgba(18, 109, 221, 0.12);
}

.hero-grid {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(38vw, 580px);
  opacity: 0.48;
  background-image: linear-gradient(rgba(18, 109, 221, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 109, 221, 0.1) 1px, transparent 1px);
  background-size: 33px 33px;
  mask-image: linear-gradient(90deg, transparent, #000 28%);
}

.section-label,
.new-label {
  margin: 0;
  font-size: 0.7rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 750px;
  margin: 0 0 1.2rem;
  color: var(--navy);
  font-family: var(--sans);
  font-size: clamp(3.5rem, 6.4vw, 6.7rem);
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 0.9;
  text-wrap: balance;
}

.hero h1 span {
  color: var(--blue);
}

.hero-intro {
  max-width: 550px;
  margin: 0;
  color: rgba(18, 49, 95, 0.82);
  font-size: clamp(1rem, 1.35vw, 1.16rem);
  line-height: 1.65;
}

.event-card {
  position: relative;
  z-index: 1;
  align-self: center;
  padding: clamp(1.4rem, 2.4vw, 2rem);
  color: var(--navy);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 1rem;
  box-shadow: 12px 13px 0 rgba(18, 109, 221, 0.1);
}

.event-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.event-label,
.event-time > span,
.submission-deadline > span {
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.event-mark {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  color: var(--white);
  background: var(--blue);
  border-radius: 50%;
  font-size: 1.05rem;
}

.event-card strong {
  display: block;
  margin-top: clamp(2rem, 4vw, 3.6rem);
  font-family: var(--serif);
  font-size: clamp(2.15rem, 4vw, 3.7rem);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 0.92;
}

.event-year {
  display: block;
  margin-top: 0.4rem;
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.04em;
}

.event-line {
  height: 1px;
  margin: 1.65rem 0 1.25rem;
  background: rgba(10, 46, 104, 0.2);
}

.event-time b {
  display: block;
  margin-top: 0.28rem;
  font-family: var(--serif);
  font-size: 1.1rem;
  font-style: italic;
  font-weight: 500;
}

.hero-wave {
  position: absolute;
  z-index: 1;
  right: 0;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 102px;
  overflow: visible;
  pointer-events: none;
}

.hero-wave path {
  stroke: rgba(18, 109, 221, 0.45);
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

.hero-wave path:last-child {
  stroke: rgba(53, 168, 237, 0.65);
}

.section-label {
  color: var(--blue);
}

h2,
h3 {
  text-wrap: balance;
}

.call-section {
  display: grid;
  grid-template-columns: 0.79fr 1.21fr;
  gap: clamp(3rem, 8vw, 8rem);
  padding-top: clamp(5rem, 10vw, 9rem);
  padding-bottom: clamp(5rem, 10vw, 9rem);
}

.call-heading h2,
.themes-heading h2 {
  margin: 0.85rem 0 1.35rem;
  color: var(--navy);
  font-size: clamp(2.55rem, 5vw, 5.1rem);
  font-weight: 700;
  letter-spacing: -0.055em;
  line-height: 0.94;
}

.call-heading > p:last-child {
  max-width: 430px;
  margin: 0;
  color: rgba(18, 49, 95, 0.76);
  font-size: 1.02rem;
}

.proposal-guidance {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.guidance-card {
  display: flex;
  flex-direction: column;
  min-height: 365px;
  padding: 1.45rem;
  color: var(--navy);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 0.85rem;
}

.student-guidance {
  background: #ecf8ff;
}

.card-index {
  color: var(--blue);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.12em;
}

.new-label {
  margin: 1.15rem 0 -0.5rem;
  color: #9b6200;
  font-size: 0.6rem;
}

.guidance-card h3 {
  margin: auto 0 0.75rem;
  font-size: clamp(1.45rem, 2.1vw, 2rem);
  font-weight: 650;
  letter-spacing: -0.04em;
  line-height: 1;
}

.student-guidance h3 {
  margin-top: auto;
}

.guidance-card p {
  margin: 0;
  color: rgba(18, 49, 95, 0.77);
  font-size: 0.94rem;
  line-height: 1.58;
}

.guidance-card .guidance-detail {
  margin-top: 1rem;
  color: var(--blue);
  font-family: var(--serif);
  font-size: 1rem;
  font-style: italic;
  line-height: 1.45;
}

.submission-panel {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: minmax(210px, 0.6fr) minmax(0, 1fr);
  gap: clamp(1.3rem, 4vw, 4rem);
  align-items: center;
  padding: clamp(1.25rem, 2.5vw, 1.8rem);
  margin-top: clamp(0.5rem, 2vw, 1.5rem);
  background: linear-gradient(135deg, #ffffff, #eaf8ff);
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  box-shadow: 8px 9px 0 rgba(10, 46, 104, 0.1);
}

.submission-deadline > span {
  display: block;
}

.submission-deadline strong {
  display: block;
  margin-top: 0.42rem;
  color: var(--navy);
  font-family: var(--serif);
  font-size: clamp(1.25rem, 2.3vw, 2rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.proposal-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.proposal-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  padding: 1rem 1.1rem 1rem 1.2rem;
  font-size: clamp(0.88rem, 1.25vw, 1.02rem);
  font-weight: 650;
  line-height: 1.25;
  text-decoration: none;
  border: 1px solid currentColor;
  border-radius: 0.75rem;
  transition: box-shadow 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.proposal-button small {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.63rem;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.proposal-button b {
  display: grid;
  flex: 0 0 auto;
  width: 2rem;
  height: 2rem;
  place-items: center;
  font-size: 1rem;
  border: 1px solid currentColor;
  border-radius: 50%;
  transition: transform 0.2s ease;
}

.proposal-button:hover,
.proposal-button:focus-visible {
  box-shadow: 5px 6px 0 rgba(10, 46, 104, 0.14);
  transform: translate(-2px, -2px);
}

.proposal-button:hover b,
.proposal-button:focus-visible b {
  transform: rotate(45deg);
}

.faculty-button {
  color: var(--white);
  background: var(--navy);
}

.student-button {
  color: var(--navy);
  background: var(--white);
}

.student-button:hover,
.student-button:focus-visible {
  background: #e6f6ff;
}

.themes-section {
  padding: clamp(5rem, 9vw, 8.5rem) 0;
  background: var(--white);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.themes-heading {
  display: grid;
  grid-template-columns: 1fr minmax(230px, 0.45fr);
  gap: 2.5rem;
  align-items: end;
}

.themes-heading h2 {
  margin-bottom: 0;
}

.themes-heading > p {
  max-width: 370px;
  margin: 0 0 0.45rem auto;
  color: rgba(18, 49, 95, 0.75);
  font-size: 1rem;
}

.theme-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin-top: clamp(3rem, 7vw, 5.5rem);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.theme-card {
  position: relative;
  min-height: 260px;
  padding: 1.35rem;
  color: var(--navy);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background 0.2s ease;
}

.theme-card:hover {
  background: var(--sky);
}

.theme-number {
  color: var(--blue);
  font-size: 0.69rem;
  font-weight: 750;
  letter-spacing: 0.12em;
}

.theme-icon {
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
  display: grid;
  width: 2.2rem;
  height: 2.2rem;
  place-items: center;
  color: var(--blue);
  border: 1px solid var(--line);
  border-radius: 50%;
  font-size: 1.1rem;
}

.theme-card h3 {
  margin: 4rem 0 0.7rem;
  font-size: clamp(1.15rem, 1.8vw, 1.55rem);
  font-weight: 650;
  letter-spacing: -0.035em;
  line-height: 1.06;
}

.theme-card p {
  margin: 0;
  color: rgba(18, 49, 95, 0.74);
  font-size: 0.9rem;
  line-height: 1.52;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1.5rem;
  align-items: center;
  min-height: 126px;
  padding: 2rem 5.5vw;
  color: var(--white);
  background: var(--navy);
}

.footer-brand .brand-seal {
  width: 38px;
  height: 38px;
}

.footer-brand .brand-name {
  font-size: 0.92rem;
}

.site-footer p,
.site-footer > span {
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.68rem;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.site-footer p {
  text-align: center;
}

.site-footer > span {
  justify-self: end;
  text-align: right;
}

body.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

body.js-ready [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.hero [data-reveal]:nth-child(1) { transition-delay: 0.05s; }
.hero [data-reveal]:nth-child(2) { transition-delay: 0.1s; }
.hero [data-reveal]:nth-child(3) { transition-delay: 0.15s; }

@media (max-width: 900px) {
  .hero-shell {
    grid-template-columns: minmax(0, 1fr) minmax(250px, 0.5fr);
    gap: 2rem;
  }

  .hero h1 {
    font-size: clamp(3.35rem, 7.5vw, 5.5rem);
  }

  .call-section {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .call-heading > p:last-child {
    max-width: 620px;
  }

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

  .theme-card {
    min-height: 220px;
  }
}

@media (max-width: 680px) {
  .site-header {
    min-height: 68px;
    padding: 0 20px;
  }

  .brand-seal {
    width: 37px;
    height: 37px;
  }

  .brand-name {
    font-size: 0.9rem;
  }

  .menu-toggle {
    position: relative;
    z-index: 2;
    display: block;
  }

  .menu-toggle[aria-expanded="true"] > span:not(.sr-only):first-of-type {
    transform: translateY(4px) rotate(45deg);
  }

  .menu-toggle[aria-expanded="true"] > span:not(.sr-only):last-of-type {
    transform: translateY(-4px) rotate(-45deg);
  }

  .site-nav {
    position: absolute;
    top: 0.65rem;
    right: 0.75rem;
    display: flex;
    visibility: hidden;
    flex-direction: column;
    align-items: stretch;
    gap: 1.15rem;
    width: min(272px, calc(100vw - 30px));
    padding: 4.4rem 1.25rem 1.25rem;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 0.75rem;
    box-shadow: 0 18px 35px rgba(10, 46, 104, 0.12);
    opacity: 0;
    transform: translateY(-8px) scale(0.97);
    transform-origin: top right;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  }

  .site-nav.is-open {
    visibility: visible;
    opacity: 1;
    transform: translateY(0) scale(1);
  }

  .header-cta {
    justify-content: space-between;
  }

  .hero-shell,
  .section-shell {
    width: calc(100% - 40px);
  }

  .hero {
    min-height: auto;
  }

  .hero-shell {
    display: block;
    min-height: 0;
    padding: 4.25rem 0 5.6rem;
  }

  .hero-grid {
    width: 64vw;
    opacity: 0.36;
  }

  .hero h1 {
    margin-top: 1.25rem;
    font-size: clamp(3.15rem, 15.7vw, 4.6rem);
    line-height: 0.9;
  }

  .hero-intro {
    margin-top: 1rem;
    font-size: 0.99rem;
  }

  .event-card {
    max-width: 470px;
    margin-top: 2.25rem;
    box-shadow: 7px 8px 0 rgba(18, 109, 221, 0.1);
  }

  .event-card strong {
    margin-top: 1.8rem;
  }

  .hero-wave {
    height: 60px;
  }

  .call-section {
    padding-top: 4.7rem;
    padding-bottom: 4.7rem;
  }

  .call-heading h2,
  .themes-heading h2 {
    font-size: clamp(2.65rem, 13vw, 4rem);
  }

  .proposal-guidance {
    grid-template-columns: 1fr;
  }

  .guidance-card {
    min-height: 265px;
  }

  .submission-panel {
    display: block;
    padding: 1.2rem;
    box-shadow: 5px 6px 0 rgba(10, 46, 104, 0.1);
  }

  .proposal-actions {
    grid-template-columns: 1fr;
    margin-top: 1.15rem;
  }

  .proposal-button {
    min-height: 72px;
  }

  .themes-section {
    padding: 4.7rem 0;
  }

  .themes-heading {
    display: block;
  }

  .themes-heading > p {
    margin: 1.35rem 0 0;
  }

  .theme-grid {
    grid-template-columns: 1fr;
    margin-top: 3rem;
  }

  .theme-card {
    min-height: 205px;
  }

  .theme-card h3 {
    margin-top: 3.5rem;
  }

  .site-footer {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    min-height: 0;
    padding: 2rem 20px;
  }

  .site-footer p,
  .site-footer > span {
    text-align: left;
  }

  .site-footer > span {
    justify-self: auto;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}