:root {
  --nu-primary: #238acb;
  --nu-deep: #3a3f6f;
  --nu-navy: #14264a;
  --nu-sky: #8ec8ea;
  --nu-ice: #f4f8fc;
  --nu-fog: #e9ecf1;
  --nu-accent: #4fb5e7;
  --ink: #14264a;
  --navy: var(--nu-navy);
  --cyan: var(--nu-primary);
  --teal: var(--nu-primary);
  --orange: var(--nu-accent);
  --lime: var(--nu-sky);
  --paper: #ffffff;
  --soft: var(--nu-ice);
  --line: rgba(58, 63, 111, 0.16);
  --muted: #62758d;
  --max: 1180px;
  --radius: 18px;
  --shadow: 0 24px 70px rgba(20, 38, 74, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 0%, rgba(35, 138, 203, 0.14), transparent 26rem),
    radial-gradient(circle at 90% 18%, rgba(142, 200, 234, 0.16), transparent 22rem),
    var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

a {
  color: inherit;
}

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

.sr-only,
.skip-link:not(:focus) {
  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:focus {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 10px 14px;
  color: var(--paper);
  background: var(--ink);
  border-radius: 10px;
}

#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.nav-shell {
  width: min(var(--max), calc(100% - 32px));
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  font-weight: 900;
}

.brand img {
  width: 155px;
  height: auto;
  object-fit: contain;
}

.brand span {
  max-width: 190px;
  line-height: 1.1;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 7px;
}

.main-nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 800;
  padding: 10px 12px;
  border-radius: 999px;
  transition: 160ms ease;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--navy);
  background: rgba(35, 138, 203, 0.13);
}

.apply-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 15px;
  border-radius: 999px;
  color: var(--paper);
  background: linear-gradient(135deg, var(--nu-primary), var(--nu-deep));
  text-decoration: none;
  font-weight: 950;
  box-shadow: 0 12px 28px rgba(35, 138, 203, .22);
  white-space: nowrap;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.apply-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 34px rgba(35, 138, 203, .28);
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span:not(.sr-only) {
  width: 22px;
  height: 2px;
  background: var(--ink);
}

.hero {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(20, 38, 74, 0.98), rgba(35, 138, 203, 0.92) 62%, rgba(142, 200, 234, 0.88)),
    var(--navy);
  color: var(--paper);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(90deg, #000, transparent 78%);
}

.hero-inner {
  position: relative;
  width: min(var(--max), calc(100% - 32px));
  min-height: 620px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(340px, .98fr);
  align-items: center;
  gap: 44px;
  padding: 80px 0;
}

.hero h1,
.page-hero h1 {
  margin: 0;
  font-size: 4.3rem;
  line-height: 0.98;
  letter-spacing: 0;
}

.hero p,
.page-hero p {
  max-width: 710px;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: 1.16rem;
}

.hero-visual {
  position: relative;
}

.hero-visual img {
  width: 100%;
  filter: drop-shadow(0 28px 35px rgba(0, 0, 0, .24));
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  text-decoration: none;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 900;
}

.button.primary {
  background: var(--paper);
  color: var(--navy);
}

.button.secondary {
  color: var(--paper);
  border-color: rgba(255,255,255,.55);
}

.button.accent {
  background: linear-gradient(135deg, var(--nu-primary), var(--nu-deep));
  color: var(--paper);
  border-color: rgba(255,255,255,.24);
}

.page-hero {
  color: var(--paper);
  background:
    radial-gradient(circle at 80% 20%, rgba(142, 200, 234, .28), transparent 24rem),
    linear-gradient(135deg, var(--nu-navy), var(--nu-deep) 50%, var(--nu-primary));
}

.page-hero .page-hero-inner {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  padding: 92px 0 72px;
}

.eyebrow {
  display: block;
  margin: 0 0 8px;
  color: var(--orange);
  text-transform: uppercase;
  font-size: .78rem;
  font-weight: 950;
  letter-spacing: 0;
}

.section {
  padding: 78px 0;
}

.section.soft {
  background: var(--soft);
}

.section-inner,
.section-title,
.pillar-grid,
.track-tabs,
.track-summary,
.semester-grid,
.elective-panel,
.visual-grid,
.timeline-panel {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.section-title {
  margin-bottom: 30px;
}

.section-title h2 {
  margin: 0;
  max-width: 840px;
  font-size: 2.45rem;
  line-height: 1.1;
  letter-spacing: 0;
}

.section-title p {
  max-width: 780px;
  color: var(--muted);
  margin: 12px 0 0;
}

.pillar-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.pillar-card {
  position: relative;
  min-height: 290px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 12px;
  text-decoration: none;
  color: var(--paper);
  border-radius: var(--radius);
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(20, 38, 74, .98), rgba(35, 138, 203, .92)),
    var(--navy);
  box-shadow: var(--shadow);
  isolation: isolate;
  transform: translateY(0);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.pillar-card:nth-child(2) { background: linear-gradient(135deg, var(--nu-deep), var(--nu-primary)); }
.pillar-card:nth-child(3) { background: linear-gradient(135deg, #23366a, #4f9ed1); }
.pillar-card:nth-child(4) { background: linear-gradient(135deg, #1b315d, #6fbce4); }

.pillar-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255,255,255,.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.1) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: .45;
  z-index: -1;
}

.pillar-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 30px 80px rgba(16, 44, 71, 0.22);
}

.card-icon {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  color: var(--paper);
  background: rgba(255, 255, 255, .15);
}

.card-icon svg {
  width: 30px;
  height: 30px;
}

.pillar-card strong {
  font-size: 1.45rem;
  line-height: 1.08;
}

.pillar-card span:last-child {
  color: rgba(255,255,255,.82);
}

.track-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.track-tabs button {
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--muted);
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 900;
  cursor: pointer;
}

.track-tabs button.is-active {
  color: var(--paper);
  background: linear-gradient(135deg, var(--nu-deep), var(--nu-primary));
}

.track-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 26px;
}

.track-summary article,
.semester,
.elective-panel,
.visual-card,
.timeline-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.92);
  box-shadow: 0 12px 38px rgba(16,44,71,.08);
}

.track-summary article {
  padding: 20px;
}

.track-summary span {
  color: var(--muted);
  font-weight: 750;
}

.track-summary strong {
  display: block;
  margin-top: 6px;
  font-size: 1.65rem;
  line-height: 1.08;
}

.track-summary small {
  display: block;
  margin-top: 8px;
  color: var(--muted);
}

.semester-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.semester {
  overflow: hidden;
}

.semester header {
  min-height: 100px;
  padding: 20px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  background:
    linear-gradient(135deg, rgba(35,138,203,.12), rgba(142,200,234,.18)),
    var(--paper);
  border-bottom: 1px solid var(--line);
}

.semester h3 {
  margin: 0;
  font-size: 1.5rem;
}

.semester header strong {
  color: var(--teal);
  white-space: nowrap;
}

.course-list {
  display: grid;
}

.course-line {
  min-height: 58px;
  display: grid;
  grid-template-columns: minmax(82px, .7fr) minmax(0, 2.1fr) minmax(70px, .55fr);
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
}

.course-line:last-child {
  border-bottom: 0;
}

.code {
  color: var(--navy);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-weight: 950;
}

.course-link {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-weight: 850;
  text-align: left;
  cursor: pointer;
  text-decoration: underline;
  text-decoration-color: rgba(35,138,203,.45);
  text-underline-offset: 4px;
}

.course-link:hover,
.course-link:focus-visible {
  color: var(--teal);
}

.credits {
  text-align: right;
  font-weight: 950;
  color: var(--nu-deep);
}

.elective-panel {
  margin-top: 22px;
  padding: 24px;
}

.elective-panel h3 {
  margin: 0 0 18px;
}

.elective-columns {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, .8fr);
  gap: 24px;
}

.elective-columns h4 {
  margin: 0 0 10px;
}

.visual-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.visual-card {
  overflow: hidden;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.visual-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.media-frame {
  position: relative;
  margin: 0;
  width: 100%;
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(35, 138, 203, .14), rgba(233, 236, 241, .86)),
    var(--nu-fog);
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: -18px;
  background-image: var(--media-src);
  background-size: cover;
  background-position: center;
  filter: blur(24px) saturate(.85);
  opacity: .18;
  transform: scale(1.05);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255,255,255,.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.18) 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: .34;
  pointer-events: none;
}

.media-image {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  padding: 14px;
  filter: drop-shadow(0 12px 22px rgba(20, 38, 74, .16));
}

.visual-card div {
  padding: 20px;
}

.visual-card h3 {
  margin: 0 0 8px;
  font-size: 1.26rem;
}

.visual-card p,
.visual-card li {
  color: var(--muted);
}

.visual-card p {
  margin: 0;
}

.visual-card h4 {
  margin: 16px 0 6px;
}

.visual-card ul {
  margin: 0;
  padding-left: 19px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.tag-row span {
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(35,138,203,.12);
  color: var(--teal);
  font-size: .82rem;
  font-weight: 850;
}

.timeline-panel {
  margin-top: 26px;
  padding: 26px;
}

.timeline-panel ol {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.timeline-panel li {
  padding-left: 18px;
  border-left: 3px solid var(--orange);
}

.timeline-panel span {
  display: block;
  color: var(--muted);
  font-size: .86rem;
}

.timeline-panel strong {
  display: block;
  margin-top: 3px;
}

dialog {
  width: min(860px, calc(100% - 28px));
  max-height: min(780px, calc(100% - 28px));
  padding: 0;
  border: 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

dialog::backdrop {
  background: rgba(10, 27, 35, .62);
}

.modal-panel {
  position: relative;
  padding: 30px;
}

.modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  min-height: 42px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper);
  font-weight: 900;
  cursor: pointer;
}

#course-modal-body h2 {
  margin: 6px 90px 12px 0;
  font-size: 2rem;
  line-height: 1.1;
}

#course-modal-body p,
.source-line {
  color: var(--muted);
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.detail-grid section {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
}

.detail-grid h3 {
  margin: 0 0 8px;
}

.detail-grid ul {
  margin: 0;
  padding-left: 19px;
  color: var(--muted);
}

#site-footer {
  background: var(--nu-navy);
  color: var(--paper);
}

.footer-grid {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  padding: 38px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}

.footer-grid img {
  width: 190px;
  height: auto;
  object-fit: contain;
  background: rgba(255,255,255,.95);
  padding: 10px 12px;
  border-radius: 14px;
}

.footer-grid p {
  color: rgba(255,255,255,.72);
}

.footer-grid nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px 18px;
}

.footer-grid a {
  color: rgba(255,255,255,.86);
  font-weight: 800;
}

.footer-apply {
  color: var(--paper) !important;
}

.apply-section {
  padding-top: 0;
}

.apply-panel {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  padding: 34px;
  border-radius: var(--radius);
  color: var(--paper);
  background:
    radial-gradient(circle at 88% 22%, rgba(142, 200, 234, .32), transparent 17rem),
    linear-gradient(135deg, var(--nu-deep), var(--nu-primary));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  box-shadow: var(--shadow);
}

.apply-panel h2 {
  margin: 0;
  font-size: 2rem;
  line-height: 1.1;
}

.apply-panel p {
  margin: 8px 0 0;
  color: rgba(255,255,255,.82);
}

@media (max-width: 1040px) {
  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 76px;
    padding: 16px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .main-nav.is-open {
    display: grid;
  }

  .hero-inner,
  .pillar-grid,
  .track-summary,
  .visual-grid,
  .timeline-panel ol {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero h1,
  .page-hero h1 {
    font-size: 3.35rem;
  }
}

@media (max-width: 720px) {
  .nav-shell,
  .hero-inner,
  .page-hero .page-hero-inner,
  .section-inner,
  .section-title,
  .pillar-grid,
  .track-tabs,
  .track-summary,
  .semester-grid,
  .elective-panel,
  .visual-grid,
  .timeline-panel {
    width: min(var(--max), calc(100% - 24px));
  }

  .brand img {
    width: 108px;
  }

  .brand span {
    display: none;
  }

  .nav-shell {
    gap: 10px;
  }

  .header-apply {
    min-height: 38px;
    padding: 8px 11px;
    font-size: .9rem;
  }

  .hero-inner,
  .pillar-grid,
  .track-summary,
  .semester-grid,
  .elective-columns,
  .visual-grid,
  .timeline-panel ol,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    min-height: 0;
    padding: 54px 0 64px;
  }

  .hero h1,
  .page-hero h1 {
    font-size: 2.55rem;
  }

  .hero p,
  .page-hero p {
    font-size: 1rem;
  }

  .hero-visual {
    order: -1;
  }

  .page-hero .page-hero-inner {
    padding: 68px 0 56px;
  }

  .section {
    padding: 56px 0;
  }

  .section-title h2 {
    font-size: 1.9rem;
  }

  .main-nav.is-open {
    grid-template-columns: 1fr;
  }

  .course-line {
    grid-template-columns: minmax(74px, .7fr) minmax(0, 1.8fr);
    align-items: start;
  }

  .credits {
    grid-column: 2;
    text-align: left;
  }

  .footer-grid {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-grid nav {
    justify-content: flex-start;
  }
}