:root {
  --ink: #182030;
  --navy: #22314a;
  --teal: #0f8b8d;
  --blue: #3e73b9;
  --red: #c84c3f;
  --amber: #d9912b;
  --green: #4e936a;
  --gray: #687386;
  --line: #d5dee8;
  --pale: #f4f7fa;
  --mint: #e8f6f4;
  --cream: #fff5e4;
  --white: #ffffff;
  --shadow: 0 16px 38px rgb(24 32 48 / 12%);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Yu Gothic", "YuGothic", "Hiragino Kaku Gothic ProN", Meiryo, system-ui, sans-serif;
  line-height: 1.75;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: fixed;
  z-index: 20;
  inset: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 74px;
  padding: 12px 28px;
  color: var(--white);
  transition: background 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

.site-header.is-scrolled {
  color: var(--ink);
  background: rgb(255 255 255 / 94%);
  box-shadow: 0 8px 24px rgb(24 32 48 / 10%);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  min-width: 260px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 2px solid currentColor;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.25;
}

.brand strong {
  font-size: 15px;
}

.brand small {
  margin-top: 2px;
  font-size: 11px;
  opacity: .8;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 13px;
  font-weight: 700;
}

.site-nav a {
  text-decoration: none;
  text-underline-offset: 5px;
}

.site-nav a:hover {
  text-decoration: underline;
}

.hero {
  position: relative;
  min-height: 82vh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: var(--white);
  background: var(--navy);
}

.hero-bg,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-bg {
  background-image: url("assets/hero-yukiguni-fracture-center.png");
  background-size: cover;
  background-position: center;
  transform: scale(1.02);
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgb(12 20 34 / 88%) 0%, rgb(12 20 34 / 62%) 42%, rgb(12 20 34 / 18%) 76%),
    linear-gradient(0deg, rgb(12 20 34 / 58%) 0%, rgb(12 20 34 / 0%) 40%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 150px 0 82px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #bde9e4;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(38px, 6vw, 68px);
  line-height: 1.12;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.2;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  font-size: 20px;
  line-height: 1.35;
}

.hero-copy {
  max-width: 650px;
  margin: 22px 0 0;
  font-size: 19px;
  color: rgb(255 255 255 / 88%);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid rgb(255 255 255 / 70%);
  font-weight: 800;
  text-decoration: none;
}

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

.button.secondary {
  color: var(--white);
  background: rgb(255 255 255 / 12%);
}

.band {
  padding: 76px 0;
}

.intro {
  background: var(--white);
}

.intro-grid,
.split-grid,
.partners-grid,
.winter-grid,
.contact-inner {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  gap: 56px;
  align-items: start;
}

.lead-text p,
.copy-block p,
.partners p,
.winter-band p,
.contact p {
  margin: 0 0 16px;
  color: #3f4b5f;
  font-size: 16px;
}

.visual-flow {
  padding: 18px 0 70px;
  background: linear-gradient(180deg, var(--white), var(--pale));
}

.editorial-visual {
  position: relative;
  margin: 0;
}

.editorial-visual img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.editorial-visual::after {
  content: "";
  pointer-events: none;
  position: absolute;
  inset: 0;
  border: 1px solid rgb(255 255 255 / 62%);
}

.editorial-visual figcaption {
  margin-top: 12px;
  color: var(--gray);
  font-size: 13px;
  line-height: 1.6;
}

.editorial-visual.compact img {
  min-height: 280px;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 30px;
}

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

.feature-card,
.check-panel {
  border: 1px solid var(--line);
  background: var(--white);
  box-shadow: 0 8px 28px rgb(24 32 48 / 7%);
}

.feature-card {
  min-height: 226px;
  padding: 26px;
}

.feature-card p {
  margin: 12px 0 0;
  color: var(--gray);
  font-size: 15px;
}

.feature-icon {
  width: 54px;
  height: 54px;
  margin-bottom: 22px;
}

.split-section {
  padding: 86px 0;
  background: var(--white);
}

.check-panel {
  padding: 28px 30px;
  background: var(--pale);
}

.check-list {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 22px 0 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 30px;
  color: #3f4b5f;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .45em;
  width: 14px;
  height: 8px;
  border-left: 3px solid var(--teal);
  border-bottom: 3px solid var(--teal);
  transform: rotate(-45deg);
}

.winter-band {
  padding: 78px 0;
  background: var(--mint);
}

.partners {
  padding: 86px 0;
  background: var(--white);
}

.info-table {
  border: 1px solid var(--line);
}

.info-table div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 18px;
  min-height: 72px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.info-table div:last-child {
  border-bottom: 0;
}

.info-table strong {
  color: var(--teal);
}

.info-table span {
  color: #3f4b5f;
}

.contact {
  padding: 82px 0;
  color: var(--white);
  background: var(--navy);
}

.contact .section-kicker,
.contact p {
  color: rgb(255 255 255 / 78%);
}

.contact address {
  padding: 28px;
  border: 1px solid rgb(255 255 255 / 22%);
  background: rgb(255 255 255 / 8%);
  font-style: normal;
  line-height: 1.9;
}

.site-footer {
  padding: 24px 0;
  color: var(--white);
  background: #141c2b;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  font-size: 13px;
}

.footer-inner p {
  margin: 0;
}

.footer-inner a {
  text-decoration: none;
  font-weight: 700;
}

@media (max-width: 900px) {
  .site-header {
    position: absolute;
    align-items: flex-start;
    padding: 14px 20px;
  }

  .site-nav {
    display: none;
  }

  .brand {
    min-width: 0;
  }

  .hero {
    min-height: 76vh;
  }

  .hero-content {
    padding: 130px 0 60px;
  }

  .intro-grid,
  .split-grid,
  .partners-grid,
  .winter-grid,
  .contact-inner {
    grid-template-columns: 1fr;
    gap: 30px;
  }

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

@media (max-width: 620px) {
  .container,
  .hero-content {
    width: min(100% - 28px, 1120px);
  }

  .hero-bg {
    background-position: 58% center;
  }

  .hero-overlay {
    background:
      linear-gradient(90deg, rgb(12 20 34 / 92%) 0%, rgb(12 20 34 / 72%) 72%, rgb(12 20 34 / 45%) 100%),
      linear-gradient(0deg, rgb(12 20 34 / 58%) 0%, rgb(12 20 34 / 0%) 40%);
  }

  h1 {
    font-size: 36px;
  }

  .hero-copy {
    font-size: 16px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .band,
  .split-section,
  .winter-band,
  .partners,
  .contact {
    padding: 58px 0;
  }

  .info-table div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .footer-inner {
    flex-direction: column;
  }
}