:root {
  --navy: #063f78;
  --navy-dark: #073565;
  --pink: #f23868;
  --teal: #0d9ba8;
  --orange: #ff7a17;
  --yellow: #ffc20e;
  --cream: #fff2d6;
  --paper: #fff8eb;
  --ink: #073565;
  --muted: #55708a;
  --line: rgba(7, 53, 101, 0.16);
  --shadow: 0 18px 48px rgba(7, 53, 101, 0.18);
  --radius: 8px;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 88% 8%, rgba(255, 122, 23, 0.22) 0 88px, transparent 90px),
    radial-gradient(circle at 8% 32%, rgba(242, 56, 104, 0.12) 0 96px, transparent 98px),
    linear-gradient(180deg, var(--cream), var(--paper) 42%, #eef8f9 100%);
  color: var(--ink);
  font-family: "Apple SD Gothic Neo", "Pretendard", "Noto Sans KR", system-ui, sans-serif;
  letter-spacing: 0;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px clamp(18px, 4vw, 56px);
  background: rgba(255, 248, 235, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--navy-dark);
  font-size: 16px;
  font-weight: 900;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  background: var(--yellow);
  border: 3px solid var(--navy);
  border-radius: var(--radius);
  color: var(--navy);
  font-size: 18px;
  font-weight: 1000;
}

.nav-links {
  display: flex;
  gap: 18px;
  color: var(--navy);
  font-size: 14px;
  font-weight: 800;
}

.hero,
.intro-section,
.schedule-section,
.participation-section,
.donation-section {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
}

.hero {
  min-height: min(780px, calc(100svh - 68px));
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.72fr);
  align-items: center;
  gap: clamp(28px, 5vw, 72px);
  padding: clamp(42px, 8vw, 94px) 0 64px;
}

.course-label {
  margin: 0 0 18px;
  color: var(--navy);
  font-size: clamp(16px, 1.7vw, 22px);
  font-weight: 1000;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 22px;
  line-height: 0.9;
}

.wave-word {
  display: block;
  color: var(--pink);
  font-size: clamp(86px, 15vw, 188px);
  font-weight: 1000;
  letter-spacing: 0;
  text-shadow: 10px 12px 0 rgba(7, 53, 101, 0.12);
}

.title-line {
  display: flex;
  flex-wrap: wrap;
  gap: 0.22em;
  margin-top: 20px;
  font-size: clamp(38px, 5vw, 72px);
  font-weight: 1000;
  line-height: 1.05;
}

.title-line span:nth-child(1) {
  color: var(--navy);
}

.title-line span:nth-child(2) {
  color: var(--pink);
}

.title-line span:nth-child(3) {
  color: var(--teal);
}

.title-line span:nth-child(4) {
  color: var(--orange);
}

.subtitle {
  display: inline-block;
  margin: 0 0 22px;
  padding: 13px 18px;
  background: var(--yellow);
  color: var(--navy-dark);
  box-shadow: 8px 9px 0 rgba(7, 53, 101, 0.14);
  font-size: clamp(18px, 2.2vw, 28px);
  font-weight: 1000;
}

.hero-message {
  margin-bottom: 16px;
  color: var(--navy-dark);
  font-size: clamp(27px, 4vw, 48px);
  font-weight: 1000;
  line-height: 1.18;
}

.hero-body,
.wide-text,
.donation-copy > p {
  color: var(--navy);
  font-size: clamp(17px, 2vw, 24px);
  font-weight: 800;
  line-height: 1.55;
}

.hero-actions,
.copy-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button,
.copy-button {
  min-height: 52px;
  border: 3px solid var(--navy);
  border-radius: var(--radius);
  padding: 14px 20px;
  font-family: inherit;
  font-size: 16px;
  font-weight: 1000;
  line-height: 1.1;
  cursor: pointer;
  box-shadow: 6px 6px 0 rgba(7, 53, 101, 0.18);
}

.button.primary,
.copy-button {
  background: var(--navy);
  color: white;
}

.button.secondary,
.copy-button.secondary {
  background: white;
  color: var(--navy);
}

.hero-panel,
.account-card,
.guide-card,
.topic-card {
  background: rgba(255, 255, 255, 0.72);
  border: 4px solid var(--navy);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-panel {
  padding: 28px;
}

.panel-row {
  display: grid;
  gap: 8px;
  padding: 18px 0;
  border-bottom: 2px dashed rgba(7, 53, 101, 0.28);
}

.panel-row:first-child {
  padding-top: 0;
}

.panel-row span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 900;
}

.panel-row strong {
  color: var(--navy-dark);
  font-size: clamp(21px, 2.6vw, 31px);
  font-weight: 1000;
  line-height: 1.2;
}

.mini-card {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 14px;
  align-items: center;
  margin-top: 24px;
  padding: 18px;
  background: var(--teal);
  color: white;
  border-radius: var(--radius);
}

.mini-card p {
  margin: 0;
  font-size: 17px;
  font-weight: 900;
  line-height: 1.35;
}

.mini-icon,
.topic-card span,
.guide-card span {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  background: var(--yellow);
  border: 4px solid var(--navy);
  border-radius: var(--radius);
  color: var(--navy);
  font-size: 20px;
  font-weight: 1000;
}

.intro-section,
.schedule-section,
.participation-section,
.donation-section {
  padding: clamp(52px, 8vw, 92px) 0;
}

.section-heading {
  margin-bottom: 28px;
}

.section-heading p {
  display: inline-block;
  margin-bottom: 12px;
  padding: 10px 16px;
  background: var(--pink);
  color: white;
  border-radius: var(--radius);
  box-shadow: 6px 7px 0 rgba(7, 53, 101, 0.14);
  font-size: 15px;
  font-weight: 1000;
  text-transform: uppercase;
}

.section-heading h2 {
  margin: 0;
  color: var(--navy-dark);
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 1000;
  line-height: 1.02;
}

.topic-grid,
.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.topic-card,
.guide-card {
  min-height: 160px;
  padding: 22px;
}

.topic-card strong,
.guide-card h3 {
  display: block;
  margin: 14px 0 8px;
  color: var(--navy-dark);
  font-size: 24px;
  font-weight: 1000;
}

.topic-card p,
.guide-card p {
  color: var(--navy);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.45;
}

.review-link {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  margin-top: 16px;
  border: 3px solid var(--navy);
  border-radius: var(--radius);
  padding: 10px 14px;
  background: var(--yellow);
  color: var(--navy-dark);
  font-size: 15px;
  font-weight: 1000;
}

.review-link.is-disabled {
  border-style: dashed;
  background: rgba(255, 194, 14, 0.26);
  color: var(--muted);
  cursor: default;
}

.guide-card small {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.4;
}

.schedule-list {
  display: grid;
  gap: 18px;
}

.schedule-note {
  margin: -8px 0 24px;
  padding: 18px 20px;
  background: rgba(255, 194, 14, 0.28);
  border: 3px solid var(--navy);
  border-radius: var(--radius);
  color: var(--navy-dark);
  font-size: clamp(17px, 2vw, 22px);
  font-weight: 900;
  line-height: 1.5;
}

.lecture-card {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 22px;
  align-items: center;
  padding: 24px;
  background: rgba(255, 255, 255, 0.68);
  border: 4px solid var(--navy);
  border-radius: var(--radius);
  box-shadow: 8px 8px 0 rgba(7, 53, 101, 0.12);
}

.lecture-card time {
  display: grid;
  width: 106px;
  height: 106px;
  place-items: center;
  border-radius: 999px;
  color: white;
  font-size: 24px;
  font-weight: 1000;
  text-align: center;
  line-height: 1.1;
  box-shadow: 9px 9px 0 rgba(7, 53, 101, 0.16);
}

.lecture-card.pink time {
  background: var(--pink);
}

.lecture-card.orange time {
  background: var(--orange);
}

.lecture-card.green time {
  background: #168d61;
}

.lecture-card.blue time {
  background: #105990;
}

.lecture-card.purple time {
  background: #7a62c9;
}

.lecture-card h3 {
  margin-bottom: 8px;
  color: var(--navy-dark);
  font-size: clamp(24px, 3.4vw, 40px);
  font-weight: 1000;
  line-height: 1.15;
}

.lecture-card .speaker {
  display: inline-block;
  margin-bottom: 14px;
  padding: 8px 14px;
  background: var(--navy);
  color: white;
  border-radius: 999px;
  font-size: 17px;
  font-weight: 1000;
}

.lecture-card p:last-child {
  margin-bottom: 0;
  color: var(--navy);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.5;
}

.participation-section {
  position: relative;
}

.participation-section::after {
  content: "";
  display: block;
  height: 72px;
  margin-top: 42px;
  background: var(--teal);
  border-radius: 60% 40% 0 0 / 100% 100% 0 0;
}

.donation-section {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(330px, 0.7fr);
  gap: clamp(24px, 5vw, 56px);
  align-items: center;
}

.donation-safe {
  padding: 18px;
  background: rgba(255, 194, 14, 0.28);
  border-left: 6px solid var(--yellow);
}

.copy-status {
  min-height: 28px;
  margin-top: 14px;
  color: var(--teal);
  font-size: 17px;
  font-weight: 1000;
}

.account-card {
  padding: 26px;
}

.account-badge {
  display: inline-block;
  margin-bottom: 20px;
  padding: 12px 18px;
  background: var(--teal);
  color: white;
  border-radius: var(--radius);
  font-size: 22px;
  font-weight: 1000;
}

dl {
  margin: 0;
}

.account-card dl div {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 2px dashed rgba(7, 53, 101, 0.28);
}

dt {
  color: var(--muted);
  font-size: 16px;
  font-weight: 900;
}

dd {
  margin: 0;
  color: var(--navy-dark);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 1000;
  text-align: right;
}

.qr-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.qr-figure {
  display: grid;
  gap: 10px;
  justify-items: center;
  margin: 0;
  text-align: center;
}

.qr-label {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 6px 12px;
  border-radius: 8px;
  background: var(--yellow);
  color: var(--navy-dark);
  font-size: 14px;
  font-weight: 1000;
  line-height: 1.1;
}

.qr-figure img {
  display: block;
  width: min(210px, 100%);
  margin: 0 auto;
  background: white;
  border: 1px solid var(--line);
}

.qr-figure figcaption {
  max-width: 220px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.45;
}

.site-footer {
  padding: 38px 20px;
  background: var(--navy-dark);
  color: white;
}

.footer-inner {
  display: grid;
  width: min(1120px, 100%);
  margin: 0 auto;
  gap: 22px;
}

.site-footer strong {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
  font-weight: 1000;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-brand span,
.footer-info,
.footer-privacy {
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.6;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-nav a {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  border: 2px solid rgba(255, 255, 255, 0.72);
  border-radius: var(--radius);
  padding: 10px 14px;
  color: white;
  font-size: 14px;
  font-weight: 1000;
}

.footer-info {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  font-style: normal;
}

.footer-info a {
  color: white;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-privacy {
  margin: 0;
}

.sticky-donation {
  display: none;
}

@media (max-width: 860px) {
  body {
    padding-bottom: 84px;
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .donation-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 42px;
  }

  .topic-grid,
  .guide-grid {
    grid-template-columns: 1fr;
  }

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

  .lecture-card time {
    width: 88px;
    height: 88px;
    font-size: 21px;
  }

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

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

  dd {
    text-align: left;
  }

  .sticky-donation {
    position: fixed;
    right: 18px;
    bottom: 16px;
    left: 18px;
    z-index: 20;
    display: inline-flex;
    min-height: 56px;
    align-items: center;
    justify-content: center;
    border: 3px solid var(--navy);
    border-radius: var(--radius);
    background: var(--yellow);
    color: var(--navy-dark);
    box-shadow: 7px 7px 0 rgba(7, 53, 101, 0.22);
    font-size: 18px;
    font-weight: 1000;
  }
}

@media (max-width: 480px) {
  .hero,
  .intro-section,
  .schedule-section,
  .participation-section,
  .donation-section {
    width: min(100% - 24px, 1120px);
  }

  .wave-word {
    font-size: clamp(64px, 23vw, 92px);
  }

  .button,
  .copy-button {
    width: 100%;
  }

  .hero-panel,
  .account-card,
  .topic-card,
  .guide-card,
  .lecture-card {
    padding: 18px;
  }

  .qr-figure img {
    width: min(240px, 100%);
  }
}