:root {
  --ink: #2b1d12;
  --body: #3a2a1c;
  --muted: #6a5540;
  --muted-2: #8a7658;
  --gold: #b8955a;
  --gold-soft: #c9a562;
  --cream: #f6efe1;
  --panel: #fffaf0;
  --serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--body);
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(214, 178, 110, 0.28), transparent 70%),
    radial-gradient(ellipse 60% 40% at 100% 40%, rgba(214, 178, 110, 0.12), transparent 70%),
    radial-gradient(ellipse 60% 40% at 0% 80%, rgba(214, 178, 110, 0.12), transparent 70%),
    var(--cream);
  font-family: var(--serif);
  line-height: 1.7;
  overflow-x: hidden;
  padding-bottom: 5.5rem;
}

@media (min-width: 768px) {
  body {
    padding-bottom: 0;
  }
}

img,
video {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
}

.wrap {
  width: min(72rem, calc(100% - 2rem));
  margin-inline: auto;
}

.wrap-sm {
  width: min(32rem, calc(100% - 2rem));
  margin-inline: auto;
}

.wrap-md {
  width: min(40rem, calc(100% - 2rem));
  margin-inline: auto;
}

.eyebrow {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.35em;
  color: #9a7b45;
}

.gold-rule {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin: 1.25rem 0;
}

.gold-rule span:first-child,
.gold-rule span:last-child {
  height: 1px;
  width: 3rem;
  background: linear-gradient(to right, transparent, var(--gold));
}

.gold-rule span:last-child {
  background: linear-gradient(to left, transparent, var(--gold));
}

.gold-rule span:nth-child(2) {
  width: 0.375rem;
  height: 0.375rem;
  background: var(--gold);
  transform: rotate(45deg);
}

.section-title {
  text-align: center;
  margin: 0 0 2rem;
}

.section-title h2 {
  margin: 0.5rem 0 0;
  color: var(--ink);
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  font-weight: 600;
  line-height: 1.5;
}

.hero {
  padding: 1.5rem 0 0;
}

.hero-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 768px) {
  .hero {
    padding-top: 3.5rem;
  }

  .hero-grid {
    grid-template-columns: 1.15fr 1fr;
    gap: 3rem;
  }

  .hero-copy {
    text-align: left;
  }

  .hero-copy .gold-rule {
    justify-content: flex-start;
  }

  .hero-cta {
    margin-inline: 0;
  }
}

.hero-visual {
  position: relative;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: -0.75rem;
  border-radius: 0.75rem;
  background: linear-gradient(135deg, rgba(233, 212, 164, 0.5), transparent 55%, rgba(233, 212, 164, 0.4));
  filter: blur(18px);
  z-index: 0;
}

.hero-frame {
  position: relative;
  z-index: 1;
  border: 1px solid rgba(201, 165, 98, 0.6);
  border-radius: 0.5rem;
  background: #efe4cc;
  padding: 0.375rem;
  box-shadow: 0 20px 50px -20px rgba(58, 34, 18, 0.45);
}

.hero-frame img {
  width: 100%;
  border-radius: 0.25rem;
}

.hero-copy {
  text-align: center;
}

.hero-copy h1 {
  margin: 0.75rem 0 0;
  color: var(--ink);
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1.25;
}

.hero-copy h1 span {
  background: linear-gradient(to bottom, #8a6429, #5e4119);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  margin: 1rem 0 0;
  color: #4a3826;
  font-size: clamp(1rem, 2.2vw, 1.125rem);
  line-height: 2;
}

.hero-note {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.75;
}

.hero-note small {
  display: block;
  margin-top: 0.35rem;
  color: var(--muted-2);
  font-size: 0.75rem;
}

.hero-cta {
  margin: 0 auto;
  max-width: 24rem;
}

.cta {
  display: block;
  width: 100%;
  border: 1px solid rgba(201, 165, 98, 0.7);
  border-radius: 0.375rem;
  padding: 1rem 1.5rem;
  text-align: center;
  text-decoration: none;
  color: #fbf3df;
  background: linear-gradient(to bottom, #5a2a1c, #3a170f);
  box-shadow: 0 6px 20px -8px rgba(58, 23, 15, 0.6);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.cta:hover {
  background: linear-gradient(to bottom, #66311f, #431b12);
}

.cta small {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.75rem;
  font-weight: 400;
  color: #e6d3a8;
  letter-spacing: 0.04em;
}

.cta-line {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: center;
  border-radius: 0.375rem;
  padding: 1rem 1.5rem;
  text-decoration: none;
  background: #06c755;
  color: #fff;
  font-size: 1.125rem;
  font-weight: 700;
  box-shadow: 0 6px 20px -8px rgba(6, 199, 85, 0.6);
}

.cta-line:hover {
  background: #05b34c;
}

.band {
  margin-top: 3rem;
  border-block: 1px solid rgba(201, 165, 98, 0.4);
  background: linear-gradient(to right, #2b1a10, #3d2416, #2b1a10);
  padding: 1.75rem 1rem;
  text-align: center;
}

.band p {
  margin: 0;
  color: #f1e2bd;
  letter-spacing: 0.15em;
}

.band p + p {
  margin-top: 0.5rem;
  color: #cbb27c;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
}

.section {
  padding: 3.5rem 0;
}

.preview-grid {
  display: grid;
  gap: 2.5rem;
  max-width: 15rem;
  margin: 0 auto;
}

@media (min-width: 640px) {
  .preview-grid {
    max-width: 20rem;
  }
}

.preview figure {
  margin: 0;
}

.preview-frame {
  border: 1px solid rgba(201, 165, 98, 0.5);
  border-radius: 0.5rem;
  background: #1b120c;
  padding: 0.25rem;
  box-shadow: 0 10px 30px -12px rgba(43, 29, 18, 0.55);
}

.preview-frame video {
  aspect-ratio: 9 / 16;
  width: 100%;
  border-radius: 0.375rem;
  object-fit: cover;
  background: #1b120c;
}

.preview figcaption {
  margin-top: 1rem;
  text-align: center;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink);
}

.text-cta {
  display: inline-flex;
  margin-top: 0.75rem;
  color: #7a3b23;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(201, 165, 98, 0.6);
  font-size: 0.875rem;
}

.benefits {
  display: grid;
  gap: 1rem;
}

@media (min-width: 640px) {
  .benefits {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
}

.benefit {
  border-radius: 0.5rem;
  padding: 1px;
  background: linear-gradient(135deg, #d9bb78, #b8955a, #e3cc92);
  box-shadow: 0 8px 24px -14px rgba(58, 34, 18, 0.5);
}

.benefit-inner {
  height: 100%;
  border-radius: 0.45rem;
  background: var(--panel);
  padding: 1.5rem;
}

.benefit-num {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--gold);
}

.benefit h3 {
  margin: 0.5rem 0 0;
  color: var(--ink);
  font-size: 1.125rem;
}

.benefit p {
  margin: 0.5rem 0 0;
  color: #5a4632;
  font-size: 0.875rem;
  line-height: 1.75;
}

.register {
  background: rgba(239, 228, 204, 0.6);
  scroll-margin-top: 1.5rem;
}

.register-shell {
  border-radius: 0.75rem;
  padding: 1px;
  background: linear-gradient(135deg, #d9bb78, #b8955a, #e3cc92);
  box-shadow: 0 20px 50px -24px rgba(58, 34, 18, 0.55);
}

.register-inner {
  border-radius: 0.7rem;
  background: var(--panel);
  padding: 1.5rem;
}

@media (min-width: 768px) {
  .register-inner {
    padding: 2rem;
  }
}

.register-inner > p {
  margin: 0 0 1rem;
  text-align: center;
  color: #5a4632;
  font-size: 0.875rem;
  line-height: 1.75;
}

.register-inner ol {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  color: #5a4632;
  font-size: 0.875rem;
  line-height: 1.75;
}

.register-note {
  margin: 0 0 1rem;
  text-align: center;
  color: var(--muted-2);
  font-size: 0.75rem;
  line-height: 1.6;
}

.lecturer-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 768px) {
  .lecturer-grid {
    grid-template-columns: 260px 1fr;
    gap: 3rem;
  }
}

.lecturer-photo {
  width: min(13rem, 100%);
  margin: 0 auto;
  border-radius: 0.5rem;
  padding: 1px;
  background: linear-gradient(135deg, #d9bb78, #b8955a, #e3cc92);
}

.lecturer-photo img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: top;
  border-radius: 0.45rem;
}

.lecturer-copy p {
  margin: 0;
  color: #4a3826;
  font-size: 0.95rem;
  line-height: 2;
}

.lecturer-copy ul {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
}

.lecturer-copy li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  margin-top: 0.75rem;
  color: var(--ink);
  font-size: 0.95rem;
}

.lecturer-copy li::before {
  content: "";
  width: 0.375rem;
  height: 0.375rem;
  margin-top: 0.7rem;
  flex-shrink: 0;
  background: var(--gold);
  transform: rotate(45deg);
}

.curriculum {
  background: linear-gradient(to bottom, transparent, rgba(239, 228, 204, 0.5), transparent);
}

.curriculum ol {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid #d8c49a;
  border-radius: 0.5rem;
  background: rgba(255, 250, 240, 0.8);
}

.curriculum li {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.25rem;
  border-top: 1px solid rgba(216, 196, 154, 0.7);
  color: var(--ink);
}

.curriculum li:first-child {
  border-top: 0;
}

.curriculum li span {
  width: 1.5rem;
  color: var(--gold);
  text-align: center;
  font-size: 0.875rem;
}

.closing {
  border-top: 1px solid rgba(201, 165, 98, 0.4);
  background: linear-gradient(to bottom, #2b1a10, #1d110a);
  padding: 4rem 1rem;
  text-align: center;
}

.closing .eyebrow {
  color: #cbb27c;
}

.closing h2 {
  margin: 1rem 0 0;
  color: #f6e8c6;
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  font-weight: 600;
  line-height: 1.5;
}

.closing .cta {
  max-width: 24rem;
  margin-inline: auto;
}

.closing-sign {
  margin: 2.5rem 0 0;
  color: #9c865c;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
}

.sticky-cta {
  position: fixed;
  inset-inline: 0;
  bottom: 0;
  z-index: 40;
  border-top: 1px solid rgba(201, 165, 98, 0.5);
  background: rgba(29, 17, 10, 0.95);
  padding: 0.75rem 1rem calc(0.75rem + env(safe-area-inset-bottom));
  backdrop-filter: blur(8px);
  transform: translateY(100%);
  transition: transform 0.3s ease;
}

.sticky-cta.is-visible {
  transform: translateY(0);
}

@media (min-width: 768px) {
  .sticky-cta {
    display: none;
  }
}