:root {
  --bg: #f6f3ee;
  --paper: #fffdf8;
  --ink: #1b1b1f;
  --muted: #645f57;
  --accent: #d86947;
  --accent-light: #f1c9a8;
  --line: #e3ddd2;
  --shadow: 0 20px 45px rgba(77, 61, 38, 0.15);
  --radius-lg: 28px;
  --radius-md: 20px;
}

*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  font-family: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', Meiryo, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container {
  width: min(960px, 100%);
  margin: 0 auto;
  padding: 0 24px;
}

body.nav-open { overflow: hidden; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(227, 221, 210, 0.8);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
}
.logo {
  display: flex;
  flex-direction: column;
  gap: 4px;
  letter-spacing: 0.08em;
}
.logo-title { font-weight: 700; text-transform: uppercase; }
.logo-tagline { font-size: 0.8rem; color: var(--muted); }
.nav {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.9rem;
  font-weight: 500;
}
.nav a { color: var(--muted); transition: color 0.2s ease; }
.nav a:hover { color: var(--ink); }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: #fff;
  justify-content: center;
  align-items: center;
  position: relative;
  cursor: pointer;
}
.nav-toggle span {
  position: absolute;
  width: 18px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle span:nth-child(1) { transform: translateY(-6px); }
.nav-toggle span:nth-child(2) { }
.nav-toggle span:nth-child(3) { transform: translateY(6px); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: rotate(-45deg); }

/* Hero */
.hero {
  background: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.65), transparent 50%), linear-gradient(135deg, #fbe8d4 0%, #f7d6c2 45%, #f2c3b1 100%);
  color: var(--ink);
  padding: 120px 0 80px;
}
.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  letter-spacing: 0.08em;
}
.hero-subtitle {
  margin: 0;
  font-size: 1.2rem;
  color: var(--muted);
}

.section-separator {
  margin: 32px auto 0;
  text-align: center;
  letter-spacing: 0.3em;
  color: var(--muted);
}

/* Sections */
.content-section { padding: 72px 0; }
.content-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 6vw, 48px);
  box-shadow: var(--shadow);
}
.content-section h2 {
  margin: 0 0 24px;
  font-size: clamp(1.4rem, 3vw, 2.2rem);
}
.section-copy {
  display: flex;
  flex-direction: column;
  gap: 18px;
  color: var(--muted);
  font-size: 1.02rem;
}
.section-copy strong {
  color: var(--ink);
  background: linear-gradient(transparent 60%, rgba(216, 105, 71, 0.25) 60%);
}

.plain-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.plain-list li {
  font-size: 1rem;
}

.reason-block {
  padding: 20px 0;
  border-top: 1px dashed rgba(100, 95, 87, 0.3);
}
.reason-block:first-of-type { border-top: 0; padding-top: 0; }
.reason-block h3 {
  margin: 0 0 12px;
  font-size: 1.1rem;
  color: var(--ink);
}
.reason-block p { margin: 4px 0; }

.message-section .content-card {
  background: #1c1c1d;
  color: #fff;
  border-color: transparent;
}
.message-section .section-copy { color: rgba(255, 255, 255, 0.9); }
.message-section .section-copy strong { color: inherit; }
.message-section .section-separator { color: rgba(255, 255, 255, 0.7); }

/* Responsive */
@media (max-width: 960px) {
  .nav {
    position: absolute;
    top: 70px;
    left: 24px;
    right: 24px;
    flex-direction: column;
    background: #fff;
    padding: 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    gap: 12px;
  }
  .nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
  .nav-toggle { display: flex; }
}

@media (max-width: 600px) {
  .content-card { padding: 24px; }
  .section-copy { font-size: 1rem; }
  .section-separator { margin-top: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}