:root {
  --color-navy: #07152f;
  --color-blue: #1d4ed8;
  --color-sky: #38bdf8;
  --color-orange: #ff6b00;
  --color-yellow: #fee500;
  --color-ink: #111827;
  --color-muted: #64748b;
  --color-line: #e5e7eb;
  --color-bg: #f8fafc;
  --color-white: #ffffff;
  --shadow-soft: 0 20px 60px rgba(15, 23, 42, 0.12);
  --shadow-card: 0 12px 32px rgba(15, 23, 42, 0.08);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--color-ink);
  background: var(--color-white);
  line-height: 1.65;
  word-break: keep-all;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.skip-link {
  position: absolute;
  top: -48px;
  left: 16px;
  z-index: 999;
  padding: 10px 14px;
  border-radius: 10px;
  color: var(--color-white);
  background: var(--color-blue);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

.container {
  width: min(100% - 40px, var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.75);
}

.nav {
  width: min(100% - 32px, 1180px);
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  letter-spacing: -0.03em;
}

.brand-logo {
  display: block;
  width: 54px;
  height: 42px;
  object-fit: contain;
  border-radius: 10px;
  background: #ffffff;
}

.brand-text {
  font-size: 1.02rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-menu a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 14px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 700;
  color: #334155;
  transition: color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
  color: var(--color-blue);
  background: #eff6ff;
}

.nav-menu .nav-cta {
  color: var(--color-white);
  background: var(--color-blue);
}

.nav-menu .nav-cta:hover,
.nav-menu .nav-cta:focus-visible {
  color: var(--color-white);
  background: #1745bf;
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 12px;
  background: #eff6ff;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  border-radius: 99px;
  background: var(--color-blue);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 78px;
  color: var(--color-white);
  background: radial-gradient(circle at 15% 20%, rgba(56, 189, 248, 0.35), transparent 28%), linear-gradient(135deg, #07152f 0%, #0f2f6f 54%, #1d4ed8 100%);
}

.hero-bg::before,
.hero-bg::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(2px);
  opacity: 0.36;
}

.hero-bg::before {
  width: 360px;
  height: 360px;
  right: -120px;
  top: 80px;
  background: #38bdf8;
}

.hero-bg::after {
  width: 260px;
  height: 260px;
  left: -100px;
  bottom: 10px;
  background: #ff6b00;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 54px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  color: var(--color-blue);
  font-size: 0.88rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #bae6fd;
}

.hero h1,
.section-heading h2 {
  margin: 0;
  font-weight: 900;
  letter-spacing: -0.055em;
  line-height: 1.08;
}

.hero h1 {
  max-width: 760px;
  font-size: clamp(2.7rem, 6vw, 5.4rem);
}

.hero h1 span {
  color: #fbbf24;
}

.hero-description {
  max-width: 690px;
  margin: 24px 0 0;
  color: #dbeafe;
  font-size: clamp(1.08rem, 2vw, 1.3rem);
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  padding: 0 22px;
  border: 0;
  border-radius: 999px;
  font-weight: 900;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-orange), #f97316);
  box-shadow: 0 14px 30px rgba(255, 107, 0, 0.26);
}

.button-secondary {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.section .button-secondary,
.contact .button-secondary {
  color: var(--color-blue);
  background: #eff6ff;
  border-color: #bfdbfe;
}

.button-kakao {
  color: #1f2937;
  background: var(--color-yellow);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 690px;
  margin: 42px 0 0;
}

.hero-stats div {
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.1);
}

.hero-stats dt {
  font-size: 1.6rem;
  font-weight: 900;
}

.hero-stats dd {
  margin: 4px 0 0;
  color: #cbd5e1;
  font-size: 0.92rem;
}

.hero-card {
  position: relative;
  padding: 36px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-soft);
  text-align: center;
}

.profile-orbit {
  position: absolute;
  inset: 24px;
  pointer-events: none;
}

.profile-orbit span {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #fbbf24;
  animation: float 3s ease-in-out infinite;
}

.profile-orbit span:nth-child(1) { top: 8px; left: 20%; }
.profile-orbit span:nth-child(2) { right: 10%; top: 38%; animation-delay: 0.5s; }
.profile-orbit span:nth-child(3) { left: 14%; bottom: 16%; animation-delay: 1s; }

.profile-avatar {
  display: block;
  width: min(100%, 260px);
  height: 320px;
  margin: 0 auto 24px;
  border: 4px solid rgba(255, 255, 255, 0.22);
  border-radius: 34px;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 22px 44px rgba(0, 0, 0, 0.24);
  object-fit: cover;
  object-position: center top;
}

.hero-card h2 {
  margin: 0;
  font-size: 1.8rem;
}

.hero-card p {
  color: #e0f2fe;
}

.affiliation-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 8px;
  padding: 7px 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  color: #fbbf24;
  background: rgba(255, 255, 255, 0.1);
  font-size: 0.9rem;
  font-weight: 900;
}

.affiliation-link:hover,
.affiliation-link:focus-visible {
  background: rgba(255, 255, 255, 0.18);
}

.profile-tags {
  display: grid;
  gap: 8px;
  padding: 0;
  margin: 24px 0;
  list-style: none;
}

.profile-tags li {
  padding: 10px 12px;
  border-radius: 999px;
  color: #eff6ff;
  background: rgba(255, 255, 255, 0.12);
  font-size: 0.9rem;
  font-weight: 700;
}

.profile-email {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #fbbf24;
  font-weight: 800;
}

.section {
  padding: 96px 0;
}

.section:nth-of-type(even) {
  background: var(--color-bg);
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 44px;
  text-align: center;
}

.section-heading.align-left {
  margin-inline: 0;
  text-align: left;
}

.section-heading h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.section-heading p:not(.eyebrow) {
  margin: 18px 0 0;
  color: var(--color-muted);
  font-size: 1.08rem;
}

.card-grid,
.metric-grid,
.resource-grid {
  display: grid;
  gap: 22px;
}

.three-columns {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.info-card,
.metric-card,
.resource-card,
.credential-panel,
.contact-form,
.contact-note {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  box-shadow: var(--shadow-card);
}

.info-card {
  padding: 30px;
}

.info-card i {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 16px;
  color: var(--color-blue);
  background: #eff6ff;
  font-size: 1.3rem;
}

.info-card h3 {
  margin: 22px 0 10px;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}

.info-card p,
.tab-panel p,
.timeline-item p,
.resource-card span {
  color: var(--color-muted);
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 52px;
  align-items: center;
}

.split-layout.reverse {
  grid-template-columns: minmax(320px, 0.95fr) minmax(0, 1.05fr);
}

.check-list {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 28px 0 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 30px;
  font-weight: 700;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-blue);
  font-weight: 900;
}

.credential-panel {
  padding: 34px;
}

.credential-panel h3 {
  margin: 0 0 22px;
  font-size: 1.35rem;
}

.credential-item {
  padding: 20px 0;
  border-top: 1px solid var(--color-line);
}

.credential-item span {
  display: inline-flex;
  margin-bottom: 6px;
  color: var(--color-blue);
  font-size: 0.85rem;
  font-weight: 900;
}

.credential-item strong {
  display: block;
  font-size: 1.08rem;
}

.credential-item p {
  margin: 4px 0 0;
  color: var(--color-muted);
}

.program-tabs {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 20px;
}

.tab-button {
  min-height: 48px;
  padding: 0 18px;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  color: #475569;
  background: var(--color-white);
  font-weight: 900;
  cursor: pointer;
}

.tab-button.active {
  color: var(--color-white);
  background: var(--color-blue);
  border-color: var(--color-blue);
}

.tab-panels {
  max-width: 860px;
  margin: 0 auto;
}

.tab-panel {
  padding: 34px;
  border-radius: var(--radius-lg);
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-navy), #123b89);
  box-shadow: var(--shadow-soft);
}

.tab-panel h3 {
  margin: 0 0 10px;
  font-size: 1.5rem;
}

.tab-panel p {
  color: #dbeafe;
}

.tab-panel ul {
  margin: 22px 0 0;
}

.metric-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.metric-card {
  padding: 28px;
  text-align: center;
}

.metric-card strong {
  display: block;
  color: var(--color-blue);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 900;
  letter-spacing: -0.05em;
}

.metric-card span {
  color: var(--color-muted);
  font-weight: 700;
}

.timeline {
  position: relative;
  display: grid;
  gap: 18px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: #bfdbfe;
}

.timeline-item {
  position: relative;
  padding: 24px 24px 24px 58px;
  border-radius: var(--radius-md);
  background: var(--color-white);
  box-shadow: var(--shadow-card);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 30px;
  width: 18px;
  height: 18px;
  border: 4px solid #dbeafe;
  border-radius: 50%;
  background: var(--color-blue);
}

.timeline-item time {
  color: var(--color-blue);
  font-weight: 900;
}

.timeline-item h3 {
  margin: 6px 0 6px;
  font-size: 1.08rem;
}

.resource-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.resource-card {
  display: grid;
  gap: 10px;
  min-height: 210px;
  padding: 30px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.resource-card:hover,
.resource-card:focus-visible {
  transform: translateY(-5px);
  border-color: #93c5fd;
}

.resource-card i {
  color: var(--color-blue);
  font-size: 2rem;
}

.resource-card .fa-youtube {
  color: #ff0033;
}

.resource-card strong {
  font-size: 1.25rem;
}

.contact {
  background: linear-gradient(180deg, #f8fafc, #ffffff);
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 42px;
  align-items: start;
}

.contact-copy {
  position: sticky;
  top: 100px;
}

.contact-note {
  margin-top: 28px;
  padding: 20px;
  background: #fff7ed;
  border-color: #fed7aa;
}

.contact-note p {
  margin: 6px 0 0;
  color: #9a3412;
}

.contact-form {
  display: grid;
  gap: 18px;
  padding: 34px;
}

.form-row.two-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

label {
  display: grid;
  gap: 8px;
  font-weight: 800;
}

label span[aria-hidden="true"] {
  color: #dc2626;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid #cbd5e1;
  border-radius: 14px;
  padding: 13px 14px;
  color: var(--color-ink);
  background: var(--color-white);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--color-blue);
  box-shadow: 0 0 0 4px rgba(29, 78, 216, 0.12);
}

/* 개인정보 동의 라벨 - label 전역 grid 스타일을 명시적으로 덮어씀 */
.consent-check {
  display: flex !important;
  flex-direction: row;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid #cbd5e1;
  border-radius: 12px;
  background: #f8fafc;
  color: #334155;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.consent-check:hover {
  border-color: var(--color-blue);
  background: #eff6ff;
}

/* 체크박스 자체를 확실하게 보이도록 */
.consent-check input[type="checkbox"] {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin: 0;
  padding: 0;
  border: 2px solid #1d4ed8;
  border-radius: 5px;
  background: #ffffff;
  cursor: pointer;
  accent-color: #1d4ed8;
  -webkit-appearance: checkbox;
  -moz-appearance: checkbox;
  appearance: checkbox;
  opacity: 1;
  visibility: visible;
  position: static;
  outline: none;
  flex-shrink: 0;
}

.consent-check input[type="checkbox"]:focus-visible {
  box-shadow: 0 0 0 4px rgba(29, 78, 216, 0.18);
}

.consent-check input[type="checkbox"]:checked {
  background: #1d4ed8;
}

.consent-check span {
  flex: 1 1 auto;
  line-height: 1.5;
}

/* 필수 표시 추가 */
.consent-check span::after {
  content: " *";
  color: #dc2626;
  font-weight: 900;
}

.submit-button {
  width: 100%;
  min-height: 58px;
  border-radius: 16px;
}

.submit-button:disabled {
  cursor: not-allowed;
  opacity: 0.68;
  transform: none;
}

.form-status {
  min-height: 24px;
  margin: 0;
  font-weight: 800;
}

.form-status.success {
  color: #047857;
}

.form-status.error,
.form-status.info {
  color: #b45309;
}

.site-footer {
  padding: 38px 0;
  color: #cbd5e1;
  background: var(--color-navy);
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: #fbbf24;
}

.copyright {
  font-size: 0.9rem;
}

.floating-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 0;
  border-radius: 50%;
  color: var(--color-white);
  background: var(--color-blue);
  box-shadow: 0 12px 26px rgba(29, 78, 216, 0.28);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 90;
}

.floating-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.floating-kakao {
  position: fixed;
  right: 22px;
  bottom: 82px;
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  color: #1f2937;
  background: var(--color-yellow);
  font-size: 1.4rem;
  box-shadow: 0 14px 30px rgba(254, 229, 0, 0.45);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  z-index: 91;
}

.floating-kakao:hover,
.floating-kakao:focus-visible {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 18px 38px rgba(254, 229, 0, 0.55);
}

.brand:hover .brand-text,
.brand:focus-visible .brand-text {
  color: var(--color-blue);
}

.brand-logo {
  transition: transform 0.2s ease;
}

.brand:hover .brand-logo {
  transform: scale(1.04);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@media (max-width: 980px) {
  .hero-grid,
  .split-layout,
  .split-layout.reverse,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .contact-copy {
    position: static;
  }

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

@media (max-width: 760px) {
  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: absolute;
    inset: 72px 16px auto 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 14px;
    border: 1px solid var(--color-line);
    border-radius: 18px;
    background: var(--color-white);
    box-shadow: var(--shadow-card);
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-menu a {
    justify-content: center;
  }

  .hero {
    padding: 72px 0 56px;
  }

  .hero-stats,
  .three-columns,
  .metric-grid,
  .resource-grid,
  .form-row.two-fields {
    grid-template-columns: 1fr;
  }

  .program-tabs {
    flex-direction: column;
  }

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

  .contact-form,
  .hero-card,
  .credential-panel,
  .tab-panel {
    padding: 24px;
  }
}

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

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