:root {
  color-scheme: light;
}

html {
  background: #e3eef5;
}

body {
  min-width: 320px;
  margin: 0;
}

.oa-registration {
  --navy-950: #0a2240;
  --navy-800: #0e4d7b;
  --ocean-700: #126a98;
  --ocean-500: #36a7c8;
  --ocean-300: #72cce4;
  --ink: #1e2d3d;
  --muted: #5d7183;
  --line: #b8cad6;
  --surface: rgba(255, 255, 255, 0.94);
  min-height: 100vh;
  background:
    radial-gradient(80% 58% at 50% 0%, rgba(168, 202, 224, 0.95) 0%, transparent 62%),
    linear-gradient(180deg, #c8deeb 0%, #dceaf3 35%, #edf4f8 100%);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

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

.oa-registration [hidden] {
  display: none !important;
}

.oa-registration__nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--navy-950);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 1px 0 rgba(10, 34, 64, 0.04), 0 4px 12px rgba(10, 34, 64, 0.08);
}

.oa-registration__nav-inner {
  display: flex;
  align-items: stretch;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  width: 100%;
  min-height: 42px;
  margin: 0 auto;
  padding: 0 56px;
}

.oa-registration__nav a,
.oa-registration__nav-inner > span {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.oa-registration__nav a:hover,
.oa-registration__nav a:focus-visible {
  color: #ffffff;
}

.oa-registration__nav-inner > [aria-current="page"] {
  color: #ffffff;
}

.oa-registration__nav-inner > [aria-current="page"]::after {
  position: absolute;
  right: 14px;
  bottom: 7px;
  left: 14px;
  height: 2px;
  background: var(--ocean-300);
  content: "";
}

.oa-registration__nav-disabled {
  opacity: 0.48;
}

.oa-registration__nav-disabled small {
  font: inherit;
}

.oa-registration__hero {
  position: relative;
  background:
    linear-gradient(90deg, rgba(6, 27, 52, 0.70) 0%, rgba(10, 34, 64, 0.54) 48%, rgba(10, 34, 64, 0.40) 100%),
    url("../../assets/images/jeju-campus-aerial.jpg") center 22% / cover no-repeat;
  border-bottom: 1px solid #153d64;
  color: #ffffff;
  text-align: left;
}

.oa-registration__hero-inner {
  width: min(992px, 100%);
  margin: 0 auto;
  padding: 44px 56px 46px;
}

.oa-registration__hero-eyebrow {
  display: inline-block;
  margin: 0 0 16px;
  padding: 0;
  border-bottom: 0;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.72rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
}

.oa-registration__hero h1 {
  margin: 0 0 9px;
  color: #ffffff;
  font-size: clamp(2rem, 4vw, 2.65rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.1;
}

.oa-registration__hero-meta {
  margin: 0;
  padding: 0;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

.oa-registration__hero-photo-credit {
  position: absolute;
  right: max(22px, calc((100vw - 880px) / 2));
  bottom: 10px;
  color: rgba(255, 255, 255, 0.56);
  font-size: 0.58rem;
  font-weight: 400;
  letter-spacing: 0.025em;
  line-height: 1.2;
  text-align: right;
}

.oa-registration__content {
  padding: 56px 56px 80px;
}

.oa-registration__shell {
  width: min(880px, 100%);
  margin: 0 auto;
}

.oa-registration__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 0 0 28px;
}

.oa-registration__header h2 {
  margin: 5px 0 0;
  color: var(--navy-950);
  font-size: 27px;
  font-weight: 750;
  letter-spacing: -0.015em;
  line-height: 1.2;
}

.oa-registration__introduction {
  max-width: 620px;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.oa-registration__process {
  display: grid;
  gap: 18px;
  margin: 0 0 32px;
  border-top: 1px solid #bdd0dc;
  border-bottom: 1px solid #bdd0dc;
  padding: 22px 0;
}

.oa-registration__process p {
  margin: 0;
  color: #334b5d;
  font-size: 13px;
  line-height: 1.6;
}

.oa-registration__fee-line {
  display: flex;
  flex-wrap: wrap;
  gap: 3px 14px;
  align-items: baseline;
}

.oa-registration__fee-label {
  color: var(--ocean-700);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.oa-registration__fee-line > strong {
  color: var(--navy-950);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.oa-registration__fee-line i {
  margin: 0 3px;
  color: #7f9bab;
  font-style: normal;
}

.oa-registration__payment-note {
  flex-basis: 100%;
  display: grid;
  gap: 1px;
  margin-top: 4px;
}

.oa-registration__payment-note > strong {
  color: #223c51;
  font-size: 13px;
  font-weight: 800;
  line-height: 1.5;
}

.oa-registration__payment-note > span {
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.55;
}

.oa-registration__guidance {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.oa-registration__guidance p {
  display: grid;
  gap: 3px;
}

.oa-registration__guidance strong {
  color: #223c51;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.025em;
}

.oa-registration__guidance b {
  color: #223c51;
  font-weight: 750;
}

.oa-registration__process strong {
  color: #223c51;
  font-weight: 750;
}

.oa-registration__eyebrow,
.oa-registration__version {
  margin: 0;
  color: var(--ocean-700);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.14em;
  line-height: 1.4;
  text-transform: uppercase;
}

.oa-registration__version {
  flex: 0 0 auto;
  padding: 4px 0;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.oa-registration__notice {
  margin: 0 0 26px;
  border: 1px solid #d6ad55;
  border-radius: 5px;
  background: #fff8e8;
  color: #604812;
  padding: 11px 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.oa-registration__form {
  padding: 0;
}

.oa-registration__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.oa-registration__field {
  display: grid;
  gap: 7px;
  min-width: 0;
}

.oa-registration__field--wide {
  grid-column: 1 / -1;
}

.oa-registration__field span,
.oa-registration__consent span {
  color: #263b4c;
  font-size: 14px;
  font-weight: 700;
}

.oa-registration__field .oa-registration__field-label {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  align-items: baseline;
  justify-content: space-between;
}

.oa-registration__field-label small {
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

.oa-registration__field small {
  color: var(--muted);
  font-size: 12px;
}

.oa-registration__field input,
.oa-registration__field select {
  width: 100%;
  min-height: 46px;
  border: 1px solid #aebfca;
  border-radius: 5px;
  background: #ffffff;
  color: var(--ink);
  font: inherit;
  padding: 9px 12px;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.oa-registration__field select,
.oa-registration__field input[data-country-input] {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5l5-5' fill='none' stroke='%23263b4c' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-position: right 14px center;
  background-repeat: no-repeat;
  background-size: 12px 8px;
  padding-right: 40px;
}

.oa-registration__field input[data-country-input]::-webkit-calendar-picker-indicator {
  opacity: 0;
}

.oa-registration__field input:hover,
.oa-registration__field select:hover {
  border-color: #799aad;
}

.oa-registration__field input:focus,
.oa-registration__field select:focus {
  border-color: var(--ocean-700);
  outline: none;
  box-shadow: 0 0 0 3px rgba(54, 167, 200, 0.2);
}

.oa-registration__consent {
  display: grid;
  grid-template-columns: 18px 1fr;
  align-items: start;
  gap: 11px;
  margin-top: 24px;
}

.oa-registration__consent input {
  width: 16px;
  height: 16px;
  margin: 4px 0 0;
  accent-color: var(--ocean-700);
}

.oa-registration__invitation-letter {
  border: 1px solid #cfdee7;
  border-radius: 5px;
  background: #f8fbfc;
  padding: 14px 16px;
}

.oa-registration__invitation-letter strong {
  display: block;
  margin-bottom: 2px;
  color: var(--navy-950);
}

.oa-registration__privacy-note {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.65;
}

.oa-registration__privacy-note a {
  color: var(--ocean-700);
  text-underline-offset: 2px;
}

.oa-registration__turnstile {
  min-height: 65px;
  margin-top: 22px;
}

.oa-registration__turnstile > div {
  max-width: 100%;
}

.oa-registration__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  margin-top: 27px;
}

.oa-registration__verification {
  margin-top: 28px;
  border-top: 1px solid #cfdee7;
  padding-top: 26px;
}

.oa-registration__verification p {
  max-width: 660px;
  margin: 0 0 20px;
  color: #334b5d;
  line-height: 1.65;
}

.oa-registration__verification .oa-registration__verification-note {
  margin-top: -8px;
  color: var(--muted);
  font-size: 13px;
}

.oa-registration__button {
  min-height: 46px;
  border: 1px solid var(--navy-800);
  border-radius: 5px;
  background: linear-gradient(135deg, var(--navy-800), var(--ocean-700));
  color: #ffffff;
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  font-weight: 750;
  letter-spacing: 0.025em;
  padding: 11px 18px;
  transition: box-shadow 150ms ease, transform 150ms ease;
}

.oa-registration__button:hover:not(:disabled) {
  box-shadow: 0 7px 18px rgba(14, 77, 123, 0.2);
  transform: translateY(-1px);
}

.oa-registration__button:focus-visible {
  outline: 3px solid rgba(114, 204, 228, 0.72);
  outline-offset: 2px;
}

.oa-registration__button--secondary {
  background: #ffffff;
  color: var(--navy-800);
}

.oa-registration__button:disabled {
  cursor: not-allowed;
  opacity: 0.62;
}

.oa-registration__status {
  margin-top: 40px;
  border-top: 1px solid #cfdee7;
  background: transparent;
  padding: 32px 0 0;
}

.oa-registration__status h2,
.oa-registration__email-preview h2 {
  margin: 0 0 10px;
  color: var(--navy-950);
  font-size: 19px;
  line-height: 1.3;
}

.oa-registration__status p {
  margin: 0;
  color: #334b5d;
  line-height: 1.6;
}

.oa-registration__status[data-tone="error"] {
  border: 1px solid #ead1cc;
  background: #fff3f1;
  padding: 24px 22px;
}

.oa-registration__status[data-tone="success"] {
  background: transparent;
}

.oa-registration__email-preview {
  margin-top: 34px;
  border-top: 1px solid #cfdee7;
  background: transparent;
  padding: 26px 0 0;
}

.oa-registration__email-preview header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.oa-registration__email-preview header span {
  color: #9b2c2c;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.oa-registration__email-subject {
  margin: 16px 0 8px;
  font-weight: 700;
}

.oa-registration__email-preview pre {
  max-height: 320px;
  margin: 0;
  overflow: auto;
  border: 1px solid #c8d8e2;
  border-radius: 5px;
  background: #f4f8fa;
  color: #2d4354;
  font: 14px/1.55 Consolas, "Courier New", monospace;
  overflow-wrap: anywhere;
  padding: 14px;
  white-space: pre-wrap;
}

.oa-registration__status-link {
  display: inline-block;
  margin-top: 14px;
  color: var(--ocean-700);
  font-weight: 700;
}

.oa-registration__status .oa-registration__support-note {
  margin: 30px 0 0;
  border-top: 1px solid #cfdee7;
  color: #334b5d;
  font-size: 15px;
  line-height: 1.65;
  padding: 18px 0 0;
}

.oa-registration__summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 40px;
  margin: 28px 0 0;
}

.oa-registration__summary div {
  border-top: 1px solid #cfdee7;
  padding: 14px 0 16px;
}

.oa-registration__summary dt {
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.oa-registration__summary dd {
  margin: 0;
  overflow-wrap: anywhere;
  font-weight: 700;
}

@media (max-width: 760px) {
  .oa-registration__nav-inner {
    align-items: stretch;
    justify-content: flex-start;
    flex-wrap: nowrap;
    gap: 0;
    min-height: 38px;
    overflow-x: auto;
    padding: 0 22px;
    scrollbar-width: none;
  }

  .oa-registration__nav a,
  .oa-registration__nav-inner > span {
    padding: 0 10px;
  }

  .oa-registration__nav-inner > [aria-current="page"]::after {
    right: 10px;
    bottom: 6px;
    left: 10px;
  }

  .oa-registration__nav-inner::-webkit-scrollbar {
    display: none;
  }

  .oa-registration__hero-inner {
    padding: 34px 22px 35px;
  }

  .oa-registration__hero-photo-credit {
    right: 22px;
    bottom: 8px;
    font-size: 0.54rem;
  }

  .oa-registration__hero-eyebrow {
    letter-spacing: 0.2em;
  }

  .oa-registration__hero-meta {
    font-size: 0.9rem;
  }

  .oa-registration__content {
    padding: 36px 22px 48px;
  }

  .oa-registration__header {
    display: grid;
  }

  .oa-registration__header h2 {
    font-size: 24px;
  }

  .oa-registration__notice {
    margin-right: 0;
    margin-left: 0;
  }

  .oa-registration__grid,
  .oa-registration__summary {
    grid-template-columns: 1fr;
  }

  .oa-registration__guidance {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .oa-registration__button {
    width: 100%;
  }

  .oa-registration__status[data-tone="error"] {
    padding: 20px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .oa-registration__button,
  .oa-registration__field input,
  .oa-registration__field select {
    transition: none;
  }
}