/* BIHO - Beautiful Walk / 美歩 - Common Styles */

:root {
  --primary: #C4958A;
  --primary-light: #D4B8A8;
  --background: #FAF8F6;
  --card-bg: #FFFFFF;
  --text-primary: #2D2629;
  --text-secondary: #6B6367;
  --border: #E8D5CE;
  --success: #5A9A73;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  background: var(--background);
  color: var(--text-primary);
  line-height: 1.8;
  -webkit-text-size-adjust: 100%;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

/* Header */
header {
  text-align: center;
  padding: 32px 0 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}

header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.05em;
}

header h1 span {
  font-weight: 400;
  color: var(--text-secondary);
  font-size: 0.9rem;
  display: block;
  margin-top: 4px;
}

header .page-title {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-top: 12px;
  font-weight: 600;
}

header .updated {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 8px;
}

/* Language Toggle */
.lang-toggle {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 28px;
}

.lang-toggle button {
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--card-bg);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

.lang-toggle button.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* Content Sections */
.content section {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.content h2 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.content h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 16px 0 8px;
}

.content p {
  font-size: 0.9rem;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.content ul, .content ol {
  font-size: 0.9rem;
  padding-left: 1.5em;
  margin-bottom: 12px;
}

.content li {
  margin-bottom: 6px;
}

.content a {
  color: var(--primary);
  text-decoration: none;
}

.content a:hover {
  text-decoration: underline;
}

/* Highlight Box */
.highlight {
  background: #FDF6F3;
  border-left: 3px solid var(--primary);
  padding: 12px 16px;
  border-radius: 0 8px 8px 0;
  margin: 12px 0;
  font-size: 0.88rem;
}

/* FAQ */
.faq-item {
  margin-bottom: 16px;
}

.faq-item dt {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.faq-item dt::before {
  content: "Q. ";
  color: var(--primary);
  font-weight: 700;
}

.faq-item dd {
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding-left: 1.2em;
}

/* Footer */
footer {
  text-align: center;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  margin-top: 32px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

footer nav {
  margin-bottom: 12px;
}

footer nav a {
  color: var(--text-secondary);
  text-decoration: none;
  margin: 0 12px;
}

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

/* Language visibility — controlled by html[lang] */
html[lang="ja"] .lang-en { display: none !important; }
html[lang="en"] .lang-ja { display: none !important; }

/* Index page */
.hero {
  text-align: center;
  padding: 48px 0 32px;
}

.hero h1 {
  font-size: 2rem;
  color: var(--primary);
  letter-spacing: 0.1em;
}

.hero .subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-top: 8px;
}

.hero .tagline {
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-top: 20px;
  line-height: 1.8;
}

.link-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 32px;
}

.link-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--card-bg);
  border-radius: 12px;
  padding: 16px 20px;
  text-decoration: none;
  color: var(--text-primary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  transition: box-shadow 0.2s;
}

.link-card:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  text-decoration: none;
}

.link-card .icon {
  font-size: 1.4rem;
  width: 40px;
  text-align: center;
}

.link-card .label {
  font-weight: 600;
  font-size: 0.95rem;
}

.link-card .desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

@media (max-width: 480px) {
  .container { padding: 16px 16px 40px; }
  header { padding: 24px 0 16px; }
  .content section { padding: 16px; }
  .hero h1 { font-size: 1.6rem; }
}