:root {
  --bg: #faf8f4;
  --bg-alt: #f0ede6;
  --fg: #1a1d24;
  --fg-muted: #6b6f78;
  --accent: #1d3557;
  --accent-dark: #132741;
  --accent-soft: #e4ebf4;
  --rule: rgba(26, 29, 36, 0.12);
  --font-sans: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  --font-serif: "Noto Serif JP", "Noto Serif", Georgia, serif;
  --font-mono: "SF Mono", ui-monospace, Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  line-height: 1.7;
}

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

a { color: inherit; }

/* =========================================================
   NAV
========================================================= */
.a-nav {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: rgba(250, 248, 244, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--rule);
}
.a-nav .logo { display: inline-flex; align-items: center; }
.a-nav .logo img { width: 110px; height: auto; }
.a-nav .menu {
  display: none;
  gap: 28px;
  font-size: 13px;
}
.a-nav .menu a {
  color: var(--fg);
  text-decoration: none;
  transition: color 0.15s;
}
.a-nav .menu a:hover { color: var(--accent); }
.a-nav .cta {
  padding: 10px 18px;
  background: var(--accent);
  color: #fff;
  font-size: 11px;
  letter-spacing: 0.1em;
  font-weight: 600;
  text-decoration: none;
  border-radius: 2px;
  transition: background 0.2s, transform 0.2s;
}
.a-nav .cta:hover { background: var(--accent-dark); transform: translateY(-1px); }

@media (min-width: 860px) {
  .a-nav { padding: 20px 48px; }
  .a-nav .menu { display: flex; }
  .a-nav .logo img { width: 130px; }
}

/* =========================================================
   HERO
========================================================= */
.a-hero {
  padding: 56px 20px 72px;
}
.a-hero .eyebrow {
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}
.a-hero .eyebrow::before {
  content: "";
  width: 28px;
  height: 1.5px;
  background: var(--accent);
}
.a-hero h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(36px, 5.5vw, 80px);
  line-height: 1.2;
  letter-spacing: 0.005em;
  margin: 0 0 26px;
  text-wrap: pretty;
}
.a-hero h1 em {
  font-style: normal;
  color: var(--accent);
}
.a-hero p {
  font-size: 15px;
  line-height: 2;
  color: var(--fg-muted);
  max-width: 460px;
  margin: 0 0 32px;
}
.a-hero .actions {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}
.a-hero .btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent);
  color: #fff;
  padding: 16px 24px;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: transform 0.2s, background 0.2s;
}
.a-hero .btn-primary::after { content: "→"; }
.a-hero .btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); }
.a-hero .btn-ghost {
  color: var(--fg);
  padding: 16px 6px;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-decoration: none;
  border-bottom: 1px solid var(--fg);
}
.a-hero .visual {
  margin-top: 40px;
  position: relative;
}
.a-hero .visual-img {
  aspect-ratio: 3 / 4;
  background-size: cover;
  background-position: center;
  background-color: var(--accent-soft);
}
.a-hero .visual .cap {
  position: absolute;
  bottom: -22px;
  left: 0;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--fg-muted);
  text-transform: uppercase;
}

@media (min-width: 1120px) {
  .a-hero {
    padding: 88px 48px 140px;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 64px;
    align-items: end;
    max-width: 1320px;
    margin: 0 auto;
  }
  .a-hero .visual { margin-top: 0; }
  .a-hero p { font-size: 16px; }
}

/* =========================================================
   SECTION BASE
========================================================= */
.concept-a section {
  padding: 80px 20px;
}
.sec-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--fg-muted);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 18px;
}

/* =========================================================
   MESSAGE
========================================================= */
.a-message {
  background: var(--bg-alt);
}
.a-message .portrait {
  margin-bottom: 32px;
}
.a-message .portrait-img {
  aspect-ratio: 4 / 5;
  background-size: cover;
  background-position: center;
  background-color: var(--accent-soft);
}
.a-message h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.6;
  margin: 0 0 28px;
  text-wrap: pretty;
}
.a-message p {
  font-size: 14px;
  line-height: 2;
  color: var(--fg);
  margin: 0 0 18px;
}
.a-message .sig {
  margin-top: 32px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--fg-muted);
}
.a-message .sig strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--fg);
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-top: 4px;
}

@media (min-width: 1120px) {
  .a-message {
    padding: 140px 48px;
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
    align-items: center;
    max-width: 1320px;
    margin: 0 auto;
  }
  .a-message .portrait { margin-bottom: 0; max-width: 460px; }
  .a-message p { font-size: 15px; }
}

/* =========================================================
   FEATURES
========================================================= */
.a-features {
  max-width: 1320px;
  margin: 0 auto;
}
.a-features h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.3;
  margin: 0 0 48px;
  text-wrap: balance;
}
.a-features .grid {
  display: grid;
  gap: 36px;
}
.a-feature {
  border-top: 1px solid var(--fg);
  padding-top: 22px;
}
.a-feature .num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 16px;
}
.a-feature h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 22px;
  line-height: 1.5;
  margin: 0 0 14px;
}
.a-feature p {
  font-size: 14px;
  line-height: 1.95;
  color: var(--fg-muted);
  margin: 0;
}

@media (min-width: 860px) {
  .a-features { padding: 120px 48px; }
  .a-features .grid { grid-template-columns: repeat(3, 1fr); gap: 48px; }
  .a-feature h3 { font-size: 26px; }
}

/* =========================================================
   NOTE
========================================================= */
.a-note {
  background: var(--bg-alt);
}
.a-note h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.2;
  margin: 0 0 10px;
}
.a-note .sub {
  font-size: 13px;
  color: var(--fg-muted);
  margin: 0 0 40px;
}
.a-note .list {
  display: grid;
  gap: 20px;
}
.a-note-card {
  background: #fff;
  border: 1px solid var(--rule);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.25s, box-shadow 0.25s;
}
.a-note-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -20px rgba(0, 0, 0, 0.15);
}
.a-note-card .thumb {
  aspect-ratio: 16 / 9;
  background-size: cover;
  background-position: center;
  background-color: var(--accent-soft);
}
.a-note-card .meta {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--fg-muted);
  display: flex;
  gap: 10px;
}
.a-note-card h4 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 16px;
  line-height: 1.6;
  margin: 0;
}

@media (min-width: 860px) {
  .a-note {
    padding: 120px 48px;
    max-width: 1320px;
    margin: 0 auto;
  }
  .a-note .list { grid-template-columns: repeat(3, 1fr); gap: 28px; }
}

/* =========================================================
   APPLY FORM
========================================================= */
.a-apply {
  background: var(--accent);
  color: #fff;
}
.a-apply .sec-label { color: rgba(255, 255, 255, 0.7); }
.a-apply h2 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(32px, 4.5vw, 64px);
  line-height: 1.25;
  margin: 0 0 24px;
}
.a-apply .lead {
  font-size: 14px;
  line-height: 2;
  opacity: 0.88;
  margin: 0 0 14px;
}
.a-apply .lead small { font-size: 12px; opacity: 0.8; }
.a-apply .form {
  background: #fff;
  color: var(--fg);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  margin-top: 40px;
}
.a-apply .form label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--fg-muted);
  font-weight: 600;
  text-transform: uppercase;
}
.a-apply .form label em {
  color: #d94545;
  font-style: normal;
  margin-left: 4px;
}
.a-apply .form input[type="text"],
.a-apply .form input[type="email"],
.a-apply .form input[type="tel"],
.a-apply .form select,
.a-apply .form textarea {
  font-family: var(--font-sans);
  font-size: 15px;
  padding: 12px 0;
  border: none;
  border-bottom: 1px solid var(--rule);
  background: transparent;
  color: var(--fg);
  width: 100%;
  letter-spacing: 0;
  text-transform: none;
  font-weight: 400;
}
.a-apply .form input:focus,
.a-apply .form select:focus,
.a-apply .form textarea:focus {
  outline: none;
  border-bottom-color: var(--accent);
}
.a-apply .form textarea { resize: vertical; min-height: 90px; }
.age-input {
  display: flex;
  align-items: center;
  gap: 10px;
}
.age-input input { max-width: 120px; }
.age-input .unit {
  font-size: 13px;
  color: var(--fg-muted);
  letter-spacing: 0;
  text-transform: none;
  font-weight: 400;
}
.a-apply .form .checkbox {
  flex-direction: row;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--fg);
  font-weight: 400;
}
.a-apply .form .checkbox a {
  color: var(--accent);
  text-decoration: underline;
}
.a-apply .form .submit {
  margin-top: 12px;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 17px;
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}
.a-apply .form .submit:hover { background: var(--accent-dark); transform: translateY(-2px); }

@media (min-width: 1120px) {
  .a-apply {
    padding: 140px 48px;
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 96px;
    align-items: start;
    max-width: 1320px;
    margin: 0 auto;
  }
  .a-apply .form { margin-top: 0; padding: 52px; }
}

/* =========================================================
   FAQ
========================================================= */
.a-faq {
  max-width: 1320px;
  margin: 0 auto;
}
.a-faq .faq-head h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.3;
  margin: 0 0 32px;
}
.a-faq .faq-list {
  display: flex;
  flex-direction: column;
}
.a-faq details {
  border-top: 1px solid var(--rule);
  padding: 22px 0;
}
.a-faq details:last-child { border-bottom: 1px solid var(--rule); }
.a-faq summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--accent);
}
.a-faq summary::-webkit-details-marker { display: none; }
.a-faq summary::after {
  content: "+";
  color: var(--accent);
  font-size: 22px;
  line-height: 1;
  font-weight: 400;
  transition: transform 0.3s;
  flex-shrink: 0;
}
.a-faq details[open] summary::after { transform: rotate(45deg); }
.a-faq details p {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.95;
  color: var(--fg-muted);
}

@media (min-width: 1120px) {
  .a-faq {
    padding: 140px 48px;
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 80px;
    align-items: start;
  }
  .a-faq .faq-head h2 { margin: 0; }
  .a-faq summary { font-size: 18px; }
}

/* =========================================================
   FOOTER
========================================================= */
.a-footer {
  background: #0f1218;
  color: #aab0bb;
  padding: 64px 20px 28px;
  font-size: 11px;
  line-height: 1.9;
}
.footer-inner { max-width: 1320px; margin: 0 auto; }
.a-footer .brand-lg {
  font-family: var(--font-serif);
  font-size: 28px;
  color: #fff;
  font-weight: 500;
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}
.a-footer .address {
  font-size: 11px;
  line-height: 1.9;
  opacity: 0.85;
}
.a-footer .top {
  display: grid;
  gap: 40px;
  margin-bottom: 40px;
}
.a-footer h5 {
  color: #fff;
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin: 0 0 14px;
  font-weight: 600;
}
.a-footer ul { list-style: none; padding: 0; margin: 0; }
.a-footer ul li { margin-bottom: 6px; }
.a-footer ul li a {
  color: #aab0bb;
  text-decoration: none;
  transition: color 0.15s;
}
.a-footer ul li a:hover { color: #fff; }
.a-footer .legal {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 20px;
  font-size: 10px;
  color: #6a7180;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
}

@media (min-width: 860px) {
  .a-footer { padding: 80px 48px 32px; }
  .a-footer .top { grid-template-columns: 1.5fr 1fr 1fr 1fr; }
}

/* =========================================================
   FADE-IN HELPER
========================================================= */
.fade-in-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.9s cubic-bezier(.2, .7, .2, 1), transform 0.9s cubic-bezier(.2, .7, .2, 1);
}
.fade-in-up.in {
  opacity: 1;
  transform: translateY(0);
}