/* ============================================
   コアラ先生の高配当株ブログ — スタイルシート
   カラーパレット: コアラグレー × フォレストグリーン
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&family=Noto+Serif+JP:wght@400;700&display=swap');

:root {
  --color-koala-dark:    #4A5568;
  --color-koala-mid:     #8B9EAE;
  --color-koala-light:   #C4CDD5;
  --color-koala-pale:    #EDF0F3;
  --color-green-dark:    #3D6B3C;
  --color-green-mid:     #5B8B5A;
  --color-green-light:   #7BAF7A;
  --color-green-pale:    #D4E8D3;
  --color-white:         #FFFFFF;
  --color-text-primary:  #2D3748;
  --color-text-secondary:#718096;
  --color-text-light:    #A0AEC0;
  --color-bg-body:       #F7F9FA;
  --color-border:        #E2E8F0;

  --font-sans: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
  --font-serif: 'Noto Serif JP', 'Hiragino Mincho ProN', serif;

  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   20px;
  --radius-full: 9999px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:  0 4px 12px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg:  0 10px 30px rgba(0,0,0,.10), 0 4px 8px rgba(0,0,0,.05);

  --transition: .2s ease;
}

/* ── Reset ─────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-primary);
  background: var(--color-bg-body);
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ── Container ──────────────────────────────── */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ── Header / Nav ───────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  border-bottom: 2px solid var(--color-green-pale);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-green-dark);
  line-height: 1.3;
}
.logo-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-koala-light), var(--color-koala-mid));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}
.site-logo span { display: block; }
.logo-sub {
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  font-family: var(--font-sans);
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-link {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-primary);
  transition: background var(--transition), color var(--transition);
}
.nav-link:hover,
.nav-link.active {
  background: var(--color-green-pale);
  color: var(--color-green-dark);
}
.nav-cta {
  padding: 7px 18px;
  background: var(--color-green-mid);
  color: var(--color-white) !important;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  transition: background var(--transition), transform var(--transition);
}
.nav-cta:hover {
  background: var(--color-green-dark);
  transform: translateY(-1px);
}
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-koala-dark);
  border-radius: 2px;
  transition: var(--transition);
}

/* ── Hero ───────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--color-koala-pale) 0%, var(--color-green-pale) 100%);
  padding: 70px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(91,139,90,.07);
  top: -100px;
  right: -80px;
}
.hero::after {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(139,158,174,.07);
  bottom: -80px;
  left: -60px;
}
.hero-avatar {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-koala-light), var(--color-koala-mid));
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  box-shadow: 0 8px 24px rgba(139,158,174,.4);
  border: 4px solid var(--color-white);
  position: relative;
  z-index: 1;
}
.hero-label {
  display: inline-block;
  padding: 4px 14px;
  background: var(--color-green-mid);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: .05em;
  margin-bottom: 14px;
  position: relative;
  z-index: 1;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 700;
  color: var(--color-green-dark);
  line-height: 1.4;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}
.hero-catch {
  font-size: clamp(0.85rem, 2.5vw, 1rem);
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto 28px;
  position: relative;
  z-index: 1;
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  position: relative;
  z-index: 1;
}
.badge {
  padding: 6px 16px;
  background: var(--color-white);
  border: 1.5px solid var(--color-green-light);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--color-green-dark);
  font-weight: 500;
}

/* ── Section headings ───────────────────────── */
.section-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-title::before {
  content: '';
  width: 5px;
  height: 1.5em;
  background: linear-gradient(to bottom, var(--color-green-mid), var(--color-koala-mid));
  border-radius: 3px;
  flex-shrink: 0;
}

/* ── About Strip ────────────────────────────── */
.about-strip {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  margin: 48px 0;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: flex-start;
  gap: 28px;
}
.about-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-koala-light), var(--color-koala-mid));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.4rem;
  flex-shrink: 0;
  border: 3px solid var(--color-green-pale);
}
.about-body h2 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--color-green-dark);
  margin-bottom: 8px;
}
.about-body p {
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  line-height: 1.85;
}

/* ── Post Grid ──────────────────────────────── */
.posts-section {
  padding: 0 0 60px;
}
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.post-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.post-card-thumb {
  height: 170px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  position: relative;
  overflow: hidden;
}
.post-card-thumb.green  { background: linear-gradient(135deg, #c8dfc7, #a8c9a7); }
.post-card-thumb.gray   { background: linear-gradient(135deg, #d8e2ea, #c4cdd5); }
.post-card-thumb.mint   { background: linear-gradient(135deg, #c0dfd9, #9fcec6); }
.post-card-thumb.warm   { background: linear-gradient(135deg, #dde4c8, #c9d9a0); }
.post-card-body {
  padding: 20px;
}
.post-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.post-category {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: .04em;
}
.cat-beginner { background: var(--color-green-pale); color: var(--color-green-dark); }
.cat-nisa     { background: #FFF3D6; color: #875900; }
.cat-strategy { background: #E8EEF8; color: #2C4A8A; }
.cat-experience { background: #FCE8E8; color: #8A2C2C; }

.post-date {
  font-size: 0.75rem;
  color: var(--color-text-light);
}
.post-card-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--color-text-primary);
  margin-bottom: 10px;
  transition: color var(--transition);
}
.post-card:hover .post-card-title { color: var(--color-green-dark); }
.post-excerpt {
  font-size: 0.83rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.read-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 14px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-green-mid);
  transition: gap var(--transition), color var(--transition);
}
.read-more:hover { gap: 8px; color: var(--color-green-dark); }
.read-more-arrow { font-size: 0.9em; }

/* ── Point boxes (used in posts) ────────────── */
.point-box {
  background: var(--color-green-pale);
  border-left: 4px solid var(--color-green-mid);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 16px 20px;
  margin: 24px 0;
}
.point-box-title {
  font-weight: 700;
  color: var(--color-green-dark);
  margin-bottom: 8px;
  font-size: 0.95rem;
}

/* ── Sidebar ────────────────────────────────── */
.two-col-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  padding-bottom: 60px;
}
.sidebar-widget {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  margin-bottom: 24px;
}
.widget-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-green-dark);
  border-bottom: 2px solid var(--color-green-pale);
  padding-bottom: 10px;
  margin-bottom: 16px;
}
.widget-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.85rem;
}
.widget-list li:last-child { border-bottom: none; }
.widget-list a:hover { color: var(--color-green-mid); }
.widget-cat-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 9px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.85rem;
}
.widget-cat-item:last-child { border-bottom: none; }
.widget-cat-count {
  background: var(--color-green-pale);
  color: var(--color-green-dark);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
}
.profile-widget-inner {
  text-align: center;
}
.profile-widget-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-koala-light), var(--color-koala-mid));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 12px;
}
.profile-widget-name {
  font-family: var(--font-serif);
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-green-dark);
}
.profile-widget-bio {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  text-align: left;
}

/* ── Article / Post layout ──────────────────── */
.article-header {
  background: linear-gradient(135deg, var(--color-koala-pale) 0%, var(--color-green-pale) 100%);
  padding: 48px 0 40px;
}
.article-category {
  margin-bottom: 12px;
}
.article-title {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text-primary);
  margin-bottom: 16px;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--color-text-secondary);
}
.article-content {
  font-size: 1rem;
  line-height: 2;
  color: var(--color-text-primary);
}
.article-content h2 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-green-dark);
  margin: 48px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-green-pale);
}
.article-content h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 32px 0 12px;
  padding-left: 14px;
  border-left: 3px solid var(--color-green-mid);
}
.article-content p { margin-bottom: 20px; }
.article-content ul,
.article-content ol {
  list-style: initial;
  padding-left: 24px;
  margin-bottom: 20px;
}
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: 6px; }
.article-content strong { color: var(--color-green-dark); font-weight: 700; }
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.9rem;
}
.article-content th {
  background: var(--color-green-mid);
  color: var(--color-white);
  padding: 10px 14px;
  text-align: left;
  font-weight: 700;
}
.article-content td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--color-border);
}
.article-content tr:nth-child(even) td { background: var(--color-koala-pale); }

/* ── Breadcrumb ─────────────────────────────── */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  padding: 14px 0;
}
.breadcrumb a:hover { color: var(--color-green-mid); }
.breadcrumb-sep { color: var(--color-text-light); }

/* ── Footer ─────────────────────────────────── */
.site-footer {
  background: var(--color-koala-dark);
  color: var(--color-koala-light);
  padding: 48px 0 28px;
  margin-top: 60px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}
.footer-brand .site-logo { color: var(--color-white); }
.footer-brand .logo-sub { color: var(--color-koala-light); }
.footer-tagline {
  font-size: 0.8rem;
  color: var(--color-koala-light);
  margin-top: 12px;
  line-height: 1.75;
}
.footer-col-title {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-white);
  margin-bottom: 14px;
  letter-spacing: .04em;
}
.footer-links li { margin-bottom: 8px; }
.footer-links a {
  font-size: 0.82rem;
  color: var(--color-koala-light);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--color-green-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.copyright {
  font-size: 0.78rem;
  color: var(--color-koala-light);
}
.footer-disclaimer {
  font-size: 0.72rem;
  color: var(--color-koala-light);
  opacity: .7;
  max-width: 500px;
  text-align: right;
  line-height: 1.6;
}

/* ── Scroll-to-top ──────────────────────────── */
.scroll-top {
  position: fixed;
  bottom: 28px;
  right: 24px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--color-green-mid);
  color: var(--color-white);
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  box-shadow: var(--shadow-md);
  transition: background var(--transition), transform var(--transition);
  opacity: 0;
  pointer-events: none;
  z-index: 200;
}
.scroll-top.visible { opacity: 1; pointer-events: auto; }
.scroll-top:hover { background: var(--color-green-dark); transform: translateY(-2px); }

/* ── Pagination ─────────────────────────────── */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 48px;
}
.page-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1.5px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-text-secondary);
  transition: all var(--transition);
}
.page-btn:hover,
.page-btn.current {
  background: var(--color-green-mid);
  border-color: var(--color-green-mid);
  color: var(--color-white);
}

/* ── Responsive ─────────────────────────────── */
@media (max-width: 768px) {
  .site-nav { display: none; }
  .site-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-top: 1px solid var(--color-border);
    padding: 16px;
    gap: 4px;
    box-shadow: var(--shadow-md);
    z-index: 99;
  }
  .menu-toggle { display: flex; }

  .hero { padding: 48px 0 40px; }
  .about-strip {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 24px 20px;
    gap: 16px;
  }
  .posts-grid { grid-template-columns: 1fr; }
  .two-col-layout {
    grid-template-columns: 1fr;
  }
  .sidebar { order: -1; }
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .footer-disclaimer { text-align: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-title { font-size: 1.35rem; }
  .posts-grid { gap: 16px; }
}