:root {
  --navy-950: #0b1f36;
  --navy-900: #142d4c;
  --navy-800: #1d3d62;

  --orange-600: #e87516;
  --orange-500: #f28c28;
  --orange-100: #fff0df;

  --cream: #fffaf3;
  --paper: #ffffff;
  --ink: #172231;
  --muted: #5f6d7d;
  --line: #dce2e8;

  --success: #1b6b48;
  --danger: #a53232;

  --shadow:
    0 16px 45px rgba(11, 31, 54, 0.09);

  --radius-sm: 0.65rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;

  --content: 72rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  color-scheme: light;
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);

  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;

  line-height: 1.6;
}

img {
  max-width: 100%;
}

a {
  color: var(--navy-800);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--orange-600);
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.container {
  width: min(
    calc(100% - 2rem),
    var(--content)
  );

  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;

  padding: 0.75rem 1rem;

  background: var(--navy-950);
  color: #fff;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;

  border-bottom:
    1px solid rgba(20, 45, 76, 0.08);

  background:
    rgba(255, 250, 243, 0.94);

  backdrop-filter: blur(14px);
}

.nav-shell {
  min-height: 4.75rem;

  display: flex;
  align-items: center;
  justify-content: space-between;

  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;

  color: var(--navy-950);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand img {
  width: 2.65rem;
  height: 2.65rem;
}

.brand span {
  max-width: 12rem;
  line-height: 1.05;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.3rem;
}

.site-nav a {
  color: var(--navy-900);
  font-weight: 650;
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  color: var(--orange-600);
}

.button,
button.button {
  display: inline-flex;
  min-height: 2.9rem;

  align-items: center;
  justify-content: center;

  gap: 0.5rem;

  padding: 0.72rem 1.1rem;

  border: 2px solid transparent;
  border-radius: 999px;

  background: var(--orange-500);
  color: var(--navy-950);

  font-weight: 800;
  text-decoration: none;

  box-shadow:
    0 7px 18px rgba(232, 117, 22, 0.18);

  transition:
    transform 150ms ease,
    box-shadow 150ms ease,
    background 150ms ease;
}

.button:hover {
  color: var(--navy-950);
  background: #f59b45;

  box-shadow:
    0 10px 24px rgba(232, 117, 22, 0.24);

  transform: translateY(-1px);
}

.button--secondary {
  background: transparent;
  color: var(--navy-900);
  border-color: var(--navy-900);
  box-shadow: none;
}

.button--secondary:hover {
  background: var(--navy-900);
  color: #fff;
}

.button--small {
  min-height: 2.45rem;
  padding: 0.48rem 0.9rem;
}

.button[disabled] {
  opacity: 0.6;
  cursor: wait;
  transform: none;
}

.hero {
  overflow: hidden;

  background:
    radial-gradient(
      circle at 85% 15%,
      rgba(242, 140, 40, 0.2),
      transparent 24rem
    ),
    linear-gradient(
      145deg,
      var(--cream),
      #fff 55%,
      #f8f1e8
    );
}

.hero__grid {
  display: grid;

  grid-template-columns:
    minmax(0, 1.25fr)
    minmax(18rem, 0.75fr);

  align-items: center;

  gap: 4rem;

  padding-block:
    clamp(4.5rem, 9vw, 8rem);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;

  margin: 0 0 0.9rem;

  color: var(--orange-600);

  font-size: 0.82rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";

  width: 1.6rem;
  height: 0.2rem;

  border-radius: 999px;
  background: currentColor;
}

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

  color: var(--navy-950);

  line-height: 1.12;
  letter-spacing: -0.035em;
}

h1 {
  margin-bottom: 1.25rem;

  font-size:
    clamp(2.65rem, 6vw, 5.3rem);
}

h2 {
  margin-bottom: 1rem;

  font-size:
    clamp(2rem, 4vw, 3.4rem);
}

h3 {
  margin-bottom: 0.55rem;

  font-size:
    clamp(1.2rem, 2vw, 1.55rem);
}

.lead {
  max-width: 43rem;
  margin: 0;

  color: var(--muted);

  font-size:
    clamp(1.05rem, 2vw, 1.25rem);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;

  margin-top: 2rem;
}

.hero-card {
  position: relative;
  min-height: 25rem;

  padding: 2rem;

  border:
    1px solid rgba(20, 45, 76, 0.12);

  border-radius: var(--radius-lg);

  background: var(--navy-900);
  color: #fff;

  box-shadow: var(--shadow);
}

.hero-card h2 {
  color: #fff;
  font-size: 1.85rem;
}

.hero-card p {
  color: #dce8f5;
}

.check-list {
  margin: 1.5rem 0 0;
  padding: 0;

  list-style: none;
}

.check-list li {
  display: grid;

  grid-template-columns:
    1.35rem 1fr;

  gap: 0.7rem;

  margin-top: 0.85rem;
}

.check-list li::before {
  content: "✓";

  color: var(--orange-500);
  font-weight: 900;
}

.section {
  padding-block:
    clamp(4rem, 8vw, 7rem);
}

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

.section--navy {
  background: var(--navy-900);
  color: #eaf1f8;
}

.section--navy h2,
.section--navy h3 {
  color: #fff;
}

.section--navy .lead {
  color: #c9d8e8;
}

.section-heading {
  max-width: 47rem;
  margin-bottom: 2.2rem;
}

.card-grid {
  display: grid;

  grid-template-columns:
    repeat(3, minmax(0, 1fr));

  gap: 1rem;
}

.card {
  padding: 1.5rem;

  border:
    1px solid var(--line);

  border-radius:
    var(--radius-md);

  background:
    var(--paper);

  box-shadow:
    0 10px 30px rgba(11, 31, 54, 0.05);
}

.card__number {
  display: inline-grid;

  width: 2.5rem;
  height: 2.5rem;

  place-items: center;

  margin-bottom: 1.2rem;

  border-radius: 50%;

  background:
    var(--orange-100);

  color:
    var(--orange-600);

  font-weight: 900;
}

.card p:last-child {
  margin-bottom: 0;
}

.split {
  display: grid;

  grid-template-columns:
    repeat(2, minmax(0, 1fr));

  gap:
    clamp(2rem, 6vw, 5rem);

  align-items: start;
}

.callout {
  padding:
    clamp(1.7rem, 4vw, 3rem);

  border-radius:
    var(--radius-lg);

  background:
    var(--orange-100);

  border-left:
    0.45rem solid var(--orange-500);
}

.page-hero {
  padding-block:
    clamp(4rem, 8vw, 7rem);

  background:
    linear-gradient(
      135deg,
      #fff 0%,
      var(--orange-100) 130%
    );
}

.page-hero h1 {
  max-width: 55rem;

  font-size:
    clamp(2.5rem, 6vw, 4.6rem);
}

.program-card {
  display: flex;
  min-height: 100%;
  flex-direction: column;
}

.program-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;

  margin-bottom: 1rem;
}

.tag {
  display: inline-flex;

  padding: 0.3rem 0.65rem;

  border-radius: 999px;

  background: #eef3f8;
  color: var(--navy-800);

  font-size: 0.78rem;
  font-weight: 800;
}

.program-card .button {
  margin-top: auto;
  align-self: flex-start;
}

.registration-layout {
  display: grid;

  grid-template-columns:
    minmax(0, 1fr)
    minmax(17rem, 0.35fr);

  gap: 2rem;

  align-items: start;
}

.form-shell {
  padding:
    clamp(1.2rem, 4vw, 2.2rem);

  border:
    1px solid var(--line);

  border-radius:
    var(--radius-lg);

  background: #fff;

  box-shadow:
    var(--shadow);
}

fieldset {
  min-width: 0;

  margin:
    0 0 2rem;

  padding: 0;
  border: 0;
}

legend {
  width: 100%;

  margin-bottom:
    1rem;

  color:
    var(--navy-950);

  font-size:
    1.35rem;

  font-weight:
    850;
}

.field-grid {
  display: grid;

  grid-template-columns:
    repeat(2, minmax(0, 1fr));

  gap: 1rem;
}

.field {
  display: grid;
  gap: 0.42rem;
}

.field--full {
  grid-column:
    1 / -1;
}

label,
.label-text {
  color:
    var(--navy-900);

  font-size:
    0.92rem;

  font-weight:
    750;
}

.hint {
  margin: 0;

  color:
    var(--muted);

  font-size:
    0.87rem;
}

input,
select,
textarea {
  width: 100%;
  min-height: 2.9rem;

  padding:
    0.72rem 0.78rem;

  border:
    1px solid #bfc9d4;

  border-radius:
    var(--radius-sm);

  background:
    #fff;

  color:
    var(--ink);
}

textarea {
  min-height:
    8rem;

  resize:
    vertical;
}

input:focus,
select:focus,
textarea:focus,
button:focus-visible,
a:focus-visible {
  outline:
    3px solid rgba(242, 140, 40, 0.38);

  outline-offset:
    2px;

  border-color:
    var(--orange-500);
}

.student-card {
  margin-bottom:
    1.25rem;

  padding:
    1.2rem;

  border:
    1px solid var(--line);

  border-radius:
    var(--radius-md);

  background:
    #fafcfe;
}

.student-card__header,
.availability-row__header {
  display: flex;
  align-items: center;
  justify-content: space-between;

  gap: 1rem;

  margin-bottom:
    1rem;
}

.student-card__header h3 {
  margin: 0;
}

.icon-button {
  min-height:
    2.35rem;

  padding:
    0.35rem 0.7rem;

  border:
    1px solid #c8d1db;

  border-radius:
    999px;

  background:
    #fff;

  color:
    var(--navy-800);

  font-weight:
    750;
}

.icon-button:hover {
  border-color:
    var(--orange-500);

  color:
    var(--orange-600);
}

.program-options {
  display: grid;

  grid-template-columns:
    repeat(2, minmax(0, 1fr));

  gap: 0.7rem;
}

.check-option {
  display: grid;

  grid-template-columns:
    auto 1fr;

  align-items: start;

  gap: 0.7rem;

  padding:
    0.8rem;

  border:
    1px solid var(--line);

  border-radius:
    var(--radius-sm);

  background:
    #fff;
}

.check-option input {
  width:
    1.1rem;

  min-height:
    1.1rem;

  margin-top:
    0.2rem;
}

.check-option strong {
  display:
    block;

  color:
    var(--navy-900);
}

.check-option small {
  display:
    block;

  margin-top:
    0.12rem;

  color:
    var(--muted);

  font-weight:
    500;
}

.availability-list {
  display: grid;
  gap: 0.75rem;
}

.availability-row {
  padding:
    0.9rem;

  border-radius:
    var(--radius-sm);

  background:
    #fff;

  border:
    1px dashed #bdc8d3;
}

.availability-fields {
  display: grid;

  grid-template-columns:
    1.1fr 1fr 1fr 1.35fr;

  gap: 0.7rem;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;

  gap: 1rem;
}

.form-status {
  margin:
    1rem 0;

  padding:
    0.8rem 1rem;

  border-radius:
    var(--radius-sm);

  background:
    #eef3f8;
}

.form-status[hidden] {
  display: none;
}

.form-status--error {
  background:
    #fbe7e7;

  color:
    var(--danger);
}

.form-status--success {
  background:
    #e5f4ec;

  color:
    var(--success);
}

.side-note {
  position:
    sticky;

  top:
    6rem;

  padding:
    1.4rem;

  border-radius:
    var(--radius-md);

  background:
    var(--navy-900);

  color:
    #eaf1f8;
}

.side-note h2 {
  color:
    #fff;

  font-size:
    1.35rem;
}

.side-note a {
  color:
    #ffd7ab;
}

.hp-field {
  position:
    absolute !important;

  left:
    -9999px !important;

  width:
    1px !important;

  height:
    1px !important;

  overflow:
    hidden !important;
}

.site-footer {
  padding-block:
    3rem;

  background:
    var(--navy-950);

  color:
    #c8d7e6;
}

.footer-grid {
  display: grid;

  grid-template-columns:
    1.2fr 0.8fr;

  gap: 2rem;
}

.site-footer h2 {
  color:
    #fff;

  font-size:
    1.3rem;
}

.site-footer a {
  color:
    #fff;
}

.footer-links {
  display:
    flex;

  flex-wrap:
    wrap;

  gap:
    1rem;

  align-content:
    start;
}

.copyright {
  margin-top:
    2rem;

  color:
    #9eb1c4;

  font-size:
    0.85rem;
}

@media (max-width: 860px) {
  .hero__grid,
  .registration-layout,
  .split,
  .footer-grid {
    grid-template-columns:
      1fr;
  }

  .card-grid {
    grid-template-columns:
      1fr 1fr;
  }

  .hero-card {
    min-height:
      20rem;
  }

  .side-note {
    position:
      static;
  }

  .availability-fields {
    grid-template-columns:
      1fr 1fr;
  }
}

@media (max-width: 680px) {
  .nav-shell {
    align-items:
      flex-start;

    padding-block:
      0.8rem;
  }

  .site-nav {
    justify-content:
      flex-end;

    flex-wrap:
      wrap;

    gap:
      0.5rem 0.9rem;
  }

  .site-nav a:not(.button) {
    font-size:
      0.9rem;
  }

  .brand span {
    display:
      none;
  }

  .card-grid,
  .field-grid,
  .program-options,
  .availability-fields {
    grid-template-columns:
      1fr;
  }

  .hero__grid {
    gap:
      2rem;
  }

  .section {
    padding-block:
      3.5rem;
  }

  h1 {
    font-size:
      clamp(2.55rem, 13vw, 4rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior:
      auto !important;

    transition-duration:
      0.01ms !important;

    animation-duration:
      0.01ms !important;
  }
}

/*
 * Program selection states.
 */

.check-option {
  transition:
    opacity 150ms ease,
    background 150ms ease,
    border-color 150ms ease;
}


/*
 * Program is unavailable for the selected grade,
 * or no grade has been selected yet.
 */
.check-option--disabled {
  opacity: 0.35;
  background: #f1f3f5;
  border-color: #d9dee3;
  cursor: not-allowed;
}


.check-option--disabled strong,
.check-option--disabled small {
  color: var(--muted);
}


.check-option--disabled input {
  cursor: not-allowed;
}


/*
 * Available program.
 */
.check-option:not(.check-option--disabled) {
  cursor: pointer;
}


/*
 * Selected program.
 */
.check-option:has(input:checked) {
  opacity: 1;
  background: var(--orange-100);
  border-color: var(--orange-500);
}