:root {
  --paper: #f7f4ee;
  --ink: #1c2b39;
  --ink-soft: #4c5a68;
  --navy: #16324f;
  --navy-deep: #0f2438;
  --brass: #b08a3c;
  --brass-dark: #8f6d2c;
  --mist: #eee7d9;
  --line: #ddd3c0;
  --white: #ffffff;
  --serif: "Shippori Mincho B1", "Hiragino Mincho ProN", serif;
  --sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: inline-block;
  vertical-align: middle;
}

a {
  color: var(--navy);
}

h1,
h2,
h3 {
  font-family: var(--serif);
  line-height: 1.5;
  color: var(--navy-deep);
}

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 244, 238, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--navy-deep);
  font-weight: 700;
  font-size: 18px;
  font-family: var(--serif);
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--navy);
  color: #f3e9d2;
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 700;
  border-radius: 4px;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  gap: 22px;
  margin-left: auto;
}

.nav-links a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--brass-dark);
}

.header-cta {
  flex-shrink: 0;
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  color: var(--white);
  background: var(--navy);
  padding: 10px 20px;
  border-radius: 4px;
  transition: background 0.2s;
}

.header-cta:hover {
  background: var(--navy-deep);
}

/* ============ Hero ============ */
.hero {
  background:
    radial-gradient(1100px 480px at 82% -10%, rgba(176, 138, 60, 0.16), transparent 60%),
    linear-gradient(180deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: #f4efe4;
  padding: 96px 24px 88px;
  position: relative;
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--brass), rgba(176, 138, 60, 0.25));
}

.hero-inner {
  max-width: 1080px;
  margin: 0 auto;
  position: relative;
}

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--brass);
  text-transform: uppercase;
  margin-bottom: 18px;
}

.hero h1 {
  color: #fbf7ec;
  font-size: clamp(34px, 5.6vw, 56px);
  font-weight: 800;
  letter-spacing: 0.03em;
  margin-bottom: 22px;
}

.hero-lead {
  max-width: 660px;
  font-size: 17px;
  color: #d8d2c2;
  margin-bottom: 34px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  font-size: 15px;
  padding: 14px 26px;
  border-radius: 4px;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--brass);
  color: var(--navy-deep);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.22);
}

.btn-primary:hover {
  background: #c39a48;
}

.btn-secondary {
  background: transparent;
  color: #f4efe4;
  border: 1px solid rgba(244, 239, 228, 0.5);
}

.btn-secondary:hover {
  border-color: var(--brass);
  color: var(--brass);
}

.hero-note {
  font-size: 13px;
  color: #a9a290;
}

/* ============ Notice band ============ */
.notice-band {
  background: var(--mist);
  border-bottom: 1px solid var(--line);
}

.notice-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  font-size: 14px;
  color: var(--ink-soft);
}

.notice-icon {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--brass);
  color: var(--navy-deep);
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
}

/* ============ Sections ============ */
.section {
  padding: 84px 24px;
}

.section-mist {
  background: var(--mist);
}

.section-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.section-kicker {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--brass-dark);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 800;
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--brass);
  display: inline-block;
}

.section-copy {
  color: var(--ink-soft);
  max-width: 680px;
  margin-bottom: 44px;
  display: block;
}

/* ============ Series cards ============ */
.series-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.series-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--navy);
  border-radius: 6px;
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-decoration: none;
  color: var(--ink);
  transition: transform 0.2s, box-shadow 0.2s, border-top-color 0.2s;
}

.series-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(22, 50, 79, 0.12);
  border-top-color: var(--brass);
}

.series-icon {
  width: 48px;
  height: 48px;
  border-radius: 6px;
  background: rgba(22, 50, 79, 0.08);
  color: var(--navy);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.series-label {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 18px;
  color: var(--navy-deep);
}

.series-desc {
  font-size: 14px;
  color: var(--ink-soft);
  flex: 1;
}

.series-more {
  font-size: 13px;
  font-weight: 700;
  color: var(--brass-dark);
}

.series-more::after {
  content: " →";
}

/* ============ Column list ============ */
.column-list {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.column-item {
  display: flex;
  gap: 26px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 32px 34px;
}

.section-mist .column-item {
  border-color: var(--line);
}

.column-num {
  flex-shrink: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 14px;
  color: var(--brass-dark);
  border: 1px solid var(--brass);
  border-radius: 4px;
  height: 34px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  letter-spacing: 0.06em;
}

.column-body h3 {
  font-size: 21px;
  font-weight: 700;
  margin-bottom: 12px;
}

.column-body p {
  color: var(--ink-soft);
  font-size: 15px;
  margin-bottom: 12px;
}

.column-body p:last-child {
  margin-bottom: 0;
}

/* ============ Guide band ============ */
.guide-band {
  background: var(--navy-deep);
  color: #e9e2d2;
  padding: 76px 24px;
}

.guide-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.guide-inner h2 {
  color: #fbf7ec;
  font-size: clamp(22px, 3vw, 30px);
  margin-bottom: 36px;
}

.guide-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.guide-list li {
  border-top: 2px solid var(--brass);
  padding-top: 18px;
}

.guide-num {
  display: block;
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--brass);
  margin-bottom: 10px;
}

.guide-list p {
  font-size: 14px;
  color: #cfc7b4;
}

.guide-list strong {
  color: #f4efe4;
  display: block;
  margin-bottom: 6px;
}

/* ============ CTA ============ */
.cta-section {
  padding: 84px 24px;
  background: var(--paper);
}

.cta-inner {
  max-width: 1080px;
  margin: 0 auto;
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 5px solid var(--brass);
  border-radius: 6px;
  padding: 44px 46px;
  display: flex;
  align-items: center;
  gap: 36px;
}

.cta-inner h2 {
  font-size: 24px;
  margin-bottom: 10px;
}

.cta-inner p {
  color: var(--ink-soft);
  font-size: 15px;
  max-width: 620px;
}

.cta-inner .btn {
  flex-shrink: 0;
  background: var(--navy);
  color: var(--white);
  box-shadow: none;
}

.cta-inner .btn:hover {
  background: var(--navy-deep);
}

/* ============ Footer ============ */
.site-footer {
  background: var(--navy-deep);
  color: #b9b09c;
  padding: 52px 24px 40px;
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  padding-bottom: 26px;
  border-bottom: 1px solid rgba(244, 239, 228, 0.16);
  margin-bottom: 22px;
}

.site-footer .brand {
  color: #fbf7ec;
}

.footer-links {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.footer-links a {
  color: #cfc7b4;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--brass);
}

.footer-meta {
  font-size: 13px;
  line-height: 2;
  margin-bottom: 10px;
}

.footer-meta a {
  color: #e9e2d2;
}

/* ============ Sub pages ============ */
.page-hero {
  background: linear-gradient(180deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: #f4efe4;
  padding: 64px 24px 56px;
  border-bottom: 6px solid var(--brass);
}

.page-hero-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.page-hero h1 {
  color: #fbf7ec;
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 12px;
}

.page-hero p {
  color: #d8d2c2;
  max-width: 640px;
  font-size: 15px;
}

.contact-main,
.legal-main {
  max-width: 820px;
  margin: 0 auto;
  padding: 48px 24px 84px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 30px;
  transition: color 0.2s;
}

.back-link:hover {
  color: var(--brass-dark);
}

.contact-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 36px 38px;
  margin-bottom: 28px;
}

.info-list {
  display: flex;
  flex-direction: column;
  margin-bottom: 30px;
}

.info-row {
  display: flex;
  gap: 22px;
  padding: 15px 0;
  border-bottom: 1px solid var(--mist);
}

.info-row:last-child {
  border-bottom: none;
}

.info-label {
  flex-shrink: 0;
  width: 118px;
  font-weight: 700;
  font-size: 14px;
  color: var(--navy);
}

.info-value {
  font-size: 15px;
  color: var(--ink);
}

.email-button {
  width: 100%;
  justify-content: center;
}

.legal-main section {
  margin-bottom: 34px;
}

.legal-main h2 {
  font-size: 20px;
  margin-bottom: 12px;
  padding-left: 14px;
  border-left: 4px solid var(--brass);
}

.legal-main p {
  color: var(--ink-soft);
  font-size: 15px;
}

.legal-main ul {
  margin: 10px 0 0 22px;
  color: var(--ink-soft);
  font-size: 15px;
}

.legal-main li {
  margin-bottom: 6px;
}

.legal-main a {
  color: var(--navy);
}

.legal-box {
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 28px 30px;
}

.legal-box h2 {
  border-left: none;
  padding-left: 0;
}

.legal-box p {
  font-size: 14px;
}

.legal-box a {
  color: var(--navy);
}

/* ============ Responsive ============ */
@media (max-width: 960px) {
  .nav-links {
    display: none;
  }

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

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

  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .header-inner {
    padding: 12px 18px;
    gap: 14px;
  }

  .header-cta {
    margin-left: auto;
    padding: 9px 16px;
  }

  .hero {
    padding: 68px 20px 60px;
  }

  .section {
    padding: 60px 20px;
  }

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

  .column-item {
    flex-direction: column;
    gap: 14px;
    padding: 26px 24px;
  }

  .column-num {
    align-self: flex-start;
  }

  .cta-inner {
    padding: 32px 26px;
  }

  .contact-card {
    padding: 26px 24px;
  }

  .info-row {
    flex-direction: column;
    gap: 4px;
  }

  .info-label {
    width: auto;
  }

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