:root {
  --color-primary: #e8a0bf;
  --color-primary-light: #f5d5e0;
  --color-primary-dark: #c77da2;
  --color-accent: #f9e4ec;
  --color-bg: #fffaf8;
  --color-bg-alt: #fff5f0;
  --color-text: #4a3a42;
  --color-text-light: #8a7a82;
  --color-white: #ffffff;
  --font-main: "Noto Sans JP", "Helvetica Neue", Arial, sans-serif;
  --max-width: 1000px;
  --radius: 12px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  font-size: 16px;
}

a {
  color: var(--color-primary-dark);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--color-primary);
}

/* ── Header ── */
.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-accent);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  letter-spacing: 0.04em;
}

.logo span {
  color: var(--color-primary);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
}

nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  position: relative;
  padding-bottom: 2px;
}

nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.25s;
}

nav a:hover::after,
nav a.active::after {
  width: 100%;
}

/* ── Hamburger ── */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: 0.3s;
}

/* ── Hero ── */
.hero {
  text-align: center;
  padding: 80px 24px 60px;
  background: linear-gradient(160deg, var(--color-accent) 0%, var(--color-bg) 100%);
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
  letter-spacing: 0.06em;
}

.hero h1 span {
  color: var(--color-primary);
}

/* ── Hero logo interactive ── */
.hero-logo {
  font-size: 4rem;
  cursor: default;
}

.hero-logo .char {
  display: inline-block;
  transition: color 0.3s, transform 0.3s, text-shadow 0.3s;
}

.hero-logo .char.mull {
  color: var(--color-primary-dark);
}

.hero-logo .char.mel {
  color: var(--color-primary);
}

.hero-logo .char:hover {
  transform: translateY(-6px) scale(1.15);
  text-shadow: 0 6px 16px rgba(200, 125, 162, 0.35);
}

.hero-logo .char.mull:hover {
  color: var(--color-primary);
}

.hero-logo .char.mel:hover {
  color: var(--color-primary-dark);
}

.hero .tagline-sub {
  font-size: 0.95rem;
  color: var(--color-text-light);
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}

.hero .tagline {
  font-size: 1.1rem;
  color: var(--color-text-light);
  margin-bottom: 32px;
}

.hero .cta-btn {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 14px 36px;
  border-radius: 40px;
  font-weight: 600;
  font-size: 1rem;
  transition: background 0.2s, transform 0.2s;
}

.hero .cta-btn:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* ── Section ── */
.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 64px 24px;
}

.section-title {
  text-align: center;
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 40px;
  color: var(--color-primary-dark);
}

.section-title::after {
  content: "";
  display: block;
  width: 40px;
  height: 3px;
  background: var(--color-primary);
  margin: 12px auto 0;
  border-radius: 2px;
}

/* ── Cards ── */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

.card {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  box-shadow: 0 2px 12px rgba(200, 125, 162, 0.08);
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 20px rgba(200, 125, 162, 0.15);
}

.card-icon {
  font-size: 2.4rem;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: var(--color-primary-dark);
}

.card p {
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ── About page ── */
.philosophy {
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  padding: 48px 36px;
  text-align: center;
  margin-bottom: 48px;
}

.philosophy blockquote {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 16px;
  font-style: normal;
}

.philosophy p {
  color: var(--color-text-light);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.9;
}

.profile {
  display: flex;
  gap: 40px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.profile-photo {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  flex-shrink: 0;
}

.profile-info {
  flex: 1;
  min-width: 240px;
}

.profile-info h3 {
  font-size: 1.2rem;
  margin-bottom: 4px;
  color: var(--color-primary-dark);
}

.profile-info .role {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.profile-info p {
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ── Contact page ── */
.contact-info {
  max-width: 560px;
  margin: 0 auto;
}

.contact-card {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 40px 36px;
  box-shadow: 0 2px 12px rgba(200, 125, 162, 0.08);
  margin-bottom: 32px;
}

.contact-card h3 {
  font-size: 1.1rem;
  color: var(--color-primary-dark);
  margin-bottom: 20px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-accent);
  font-size: 0.95rem;
}

.contact-item:last-child {
  border-bottom: none;
}

.contact-item .label {
  font-weight: 600;
  min-width: 100px;
  color: var(--color-text);
}

.contact-note {
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  padding: 28px 32px;
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* ── Page hero (sub pages) ── */
.page-hero {
  text-align: center;
  padding: 56px 24px 40px;
  background: linear-gradient(160deg, var(--color-accent) 0%, var(--color-bg) 100%);
}

.page-hero h1 {
  font-size: 2rem;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}

.page-hero p {
  color: var(--color-text-light);
  font-size: 1rem;
}

/* ── Footer ── */
.site-footer {
  text-align: center;
  padding: 32px 24px;
  background: var(--color-white);
  border-top: 1px solid var(--color-accent);
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .hamburger {
    display: block;
  }

  nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-accent);
    padding: 16px 24px;
    transform: translateY(-120%);
    transition: transform 0.3s;
    z-index: 99;
  }

  nav.open {
    transform: translateY(0);
  }

  nav ul {
    flex-direction: column;
    gap: 16px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .profile {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}