/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  --red:        #e05a00;
  --red-dk:     #b84400;
  --orange:     #ff6600;
  --bg:         #f4f4f0;
  --surface:    #ffffff;
  --gray-50:    #fafafa;
  --gray-100:   #f0f0f0;
  --border:     #dddddd;
  --text:       #1a1a1a;
  --text-sub:   #555555;
  --text-muted: #999999;
  --link:       #0066cc;
  --font: 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', 'Yu Gothic', sans-serif;
  --r:    3px;
  --r-md: 6px;
  --shadow:    0 1px 4px rgba(0,0,0,.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,.12);
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 14px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
ul, ol { list-style: none; }
img { display: block; max-width: 100%; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--red); outline-offset: 2px; }

/* ============================================================
   CONTAINER
   ============================================================ */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 8px;
}
@media (min-width: 640px) {
  .container { padding: 0 16px; }
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  background: var(--red);
  border-bottom: 3px solid var(--red-dk);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px 8px;
}
.logo {
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1;
  text-decoration: none;
}
.logo:hover { text-decoration: none; }
.logo span {
  font-size: 11px;
  font-weight: 400;
  display: block;
  letter-spacing: 0;
  margin-top: 2px;
  color: rgba(255,255,255,0.85);
}
.header-right { display: flex; align-items: center; gap: 8px; }
.header-btn {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.35);
  padding: 5px 12px;
  border-radius: var(--r);
  font-size: 12px;
  cursor: pointer;
  font-family: var(--font);
}
.header-btn.primary { background: #fff; color: var(--red); font-weight: 700; }
.search-bar { background: var(--red-dk); padding: 8px 16px 10px; }
.search-inner { display: flex; gap: 6px; max-width: 600px; }
.search-inner input {
  flex: 1;
  padding: 8px 12px;
  border: none;
  border-radius: var(--r) 0 0 var(--r);
  font-size: 14px;
  outline: none;
  font-family: var(--font);
}
.search-inner button {
  background: var(--orange);
  color: #fff;
  border: none;
  padding: 8px 18px;
  border-radius: 0 var(--r) var(--r) 0;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  font-family: var(--font);
  transition: background 0.15s;
}
.search-inner button:hover { background: #e55a00; }

/* ============================================================
   NAVIGATION BAR
   ============================================================ */
.nav-bar {
  background: #222;
  display: flex;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-bar::-webkit-scrollbar { display: none; }
.nav-item {
  color: #ddd;
  padding: 8px 14px;
  font-size: 13px;
  white-space: nowrap;
  border-right: 1px solid #333;
  transition: background 0.15s;
  text-decoration: none;
  display: block;
}
.nav-item:hover { background: #333; color: #fff; text-decoration: none; }
.nav-item.active { color: var(--orange); font-weight: 700; }
.nav-item-btn { background: none; border: none; font-family: var(--font); cursor: pointer; }
.nav-item-caret { font-size: 9px; margin-left: 3px; opacity: 0.7; }
.nav-dropdown-wrap { position: relative; display: flex; }
.nav-dropdown { display: none; position: absolute; top: 100%; left: 0; min-width: 240px; background: #2a2a2a; border: 1px solid #444; box-shadow: 0 4px 12px rgba(0,0,0,.4); z-index: 200; }
.nav-dropdown-wrap:hover .nav-dropdown,
.nav-dropdown-wrap:focus-within .nav-dropdown { display: block; }
.nav-dropdown a { display: flex; align-items: center; gap: 8px; color: #ddd; padding: 10px 14px; font-size: 13px; border-bottom: 1px solid #3a3a3a; white-space: nowrap; text-decoration: none; }
.nav-dropdown a:last-child { border-bottom: none; }
.nav-dropdown a:hover { background: #3a3a3a; color: #fff; text-decoration: none; }
.nav-dropdown-label { font-size: 10px; color: var(--orange); font-weight: 700; margin-left: auto; padding: 1px 5px; border: 1px solid var(--orange); border-radius: 2px; }

/* ============================================================
   BREADCRUMB
   ============================================================ */
.breadcrumb-bar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 6px 0;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  font-size: 12px;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--link); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb [aria-current="page"] { color: var(--text-sub); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  background: linear-gradient(135deg, #0a1a00 0%, #1a3a00 50%, #2a5500 100%);
  padding: 28px 0;
}
@media (max-width: 480px) {
  .hero { padding: 20px 0; }
}
.hero-inner { max-width: 720px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(80,200,0,0.2);
  color: #aaee66;
  border: 1px solid rgba(80,200,0,0.35);
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 2px;
  margin-bottom: 10px;
}
.hero-title {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 12px;
}
@media (max-width: 480px) {
  .hero-title { font-size: 22px; }
}
.hero-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.8);
  line-height: 1.7;
  max-width: 600px;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: 12px 0 40px;
  align-items: start;
}
@media (min-width: 768px) {
  .layout { grid-template-columns: 1fr 260px; }
}

/* ============================================================
   SECTION CARD
   ============================================================ */
.section-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  margin-bottom: 12px;
}
.section-card:last-child { margin-bottom: 0; }
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 2px solid var(--red);
  background: var(--gray-50);
}
.section-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--red);
  display: flex;
  align-items: center;
  gap: 6px;
}
.update-date { font-size: 11px; color: var(--text-muted); }
.section-body { padding: 14px; }
.lead-text { font-size: 14px; line-height: 1.75; margin-bottom: 16px; }
.section-lead-text { font-size: 13px; color: var(--text-sub); margin-bottom: 14px; line-height: 1.7; }

/* ============================================================
   INDEX EXAMPLES（指数紹介グリッド）
   ============================================================ */
.index-examples {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 14px;
}
@media (max-width: 480px) {
  .index-examples { grid-template-columns: 1fr; }
}
.index-ex-item {
  padding: 12px 14px;
  background: var(--gray-50);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  border-left: 3px solid var(--orange);
}
.index-ex-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}
.index-ex-desc {
  font-size: 12px;
  color: var(--text-sub);
  line-height: 1.6;
}

/* ============================================================
   NOTE BOX
   ============================================================ */
.note-box {
  background: #fffbf0;
  border: 1px solid #e8d48c;
  border-radius: var(--r);
  padding: 10px 14px;
  font-size: 12px;
  color: var(--text-sub);
  line-height: 1.7;
  display: flex;
  gap: 6px;
}
.note-box p { margin: 0; }

/* ============================================================
   MECHANISM FLOW（仕組みフロー）
   ============================================================ */
.mechanism-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  margin-bottom: 16px;
  padding: 16px;
  background: var(--gray-50);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
}
.mechanism-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  text-align: center;
}
.mechanism-icon { font-size: 28px; line-height: 1; }
.mechanism-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-sub);
  line-height: 1.4;
}
.mechanism-arrow {
  font-size: 18px;
  color: var(--orange);
  font-weight: 700;
  padding: 0 4px;
  align-self: center;
}
@media (max-width: 480px) {
  .mechanism-flow { gap: 4px; }
  .mechanism-arrow { display: none; }
  .mechanism-step { flex-direction: row; gap: 8px; padding: 6px 0; width: 100%; }
  .mechanism-label { text-align: left; }
}

/* ============================================================
   POINT BOX
   ============================================================ */
.point-box {
  background: #f0fff0;
  border: 1px solid #a5d6a7;
  border-radius: var(--r-md);
  padding: 12px 14px;
}
.point-box-title {
  font-size: 13px;
  font-weight: 700;
  color: #2e7d32;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.point-list { display: flex; flex-direction: column; gap: 6px; }
.point-list li {
  font-size: 13px;
  color: var(--text-sub);
  padding-left: 14px;
  position: relative;
  line-height: 1.6;
}
.point-list li::before {
  content: '●';
  position: absolute;
  left: 0;
  color: #2e7d32;
  font-size: 10px;
  top: 4px;
}
.point-list li strong { color: var(--text); }

/* ============================================================
   COMPARE TABLE
   ============================================================ */
.table-wrap { overflow-x: auto; margin-bottom: 8px; }
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  min-width: 560px;
}
.compare-table caption {
  font-size: 11px;
  color: var(--text-muted);
  text-align: left;
  margin-bottom: 6px;
  padding-bottom: 4px;
}
.compare-table th,
.compare-table td {
  padding: 8px 10px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}
.compare-table thead th {
  background: var(--gray-100);
  font-weight: 700;
  font-size: 12px;
  color: var(--text-sub);
}
.compare-table thead th.highlight-col { background: #e8f5e9; color: #2e7d32; }
.compare-table tbody tr:hover { background: var(--gray-50); }
.compare-table tbody th {
  background: var(--gray-50);
  font-weight: 700;
  font-size: 12px;
  white-space: nowrap;
}
.compare-table td.highlight { background: #f0fff0; color: var(--text); }
.compare-table .recommended td { background: #fff9e6; }
.compare-table .recommended td.highlight { background: #e8f5e9; }
.compare-table small { font-size: 11px; color: var(--text-muted); display: block; }
.table-note { font-size: 11px; color: var(--text-muted); line-height: 1.7; }
.sim-table td { text-align: right; }
.sim-table th[scope="row"] { text-align: left; }

/* ============================================================
   DO / DON'T GRID
   ============================================================ */
.do-dont-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (max-width: 640px) { .do-dont-grid { grid-template-columns: 1fr; } }
.do-box, .dont-box { border: 1px solid var(--border); border-radius: var(--r-md); overflow: hidden; }
.do-box-head, .dont-box-head {
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}
.do-box-head { background: #e8f5e9; color: #2e7d32; }
.dont-box-head { background: #fce4e4; color: #c0392b; }
.do-list, .dont-list { padding: 10px 12px; display: flex; flex-direction: column; gap: 6px; }
.do-list li, .dont-list li {
  font-size: 12px;
  color: var(--text-sub);
  padding-left: 16px;
  position: relative;
  line-height: 1.6;
}
.do-list li::before { content: '✓'; position: absolute; left: 0; color: #2e7d32; font-weight: 700; }
.dont-list li::before { content: '×'; position: absolute; left: 0; color: #c0392b; font-weight: 700; }

/* ============================================================
   FUND LIST（ファンドカード）
   ============================================================ */
.fund-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 8px; }
.fund-item {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
}
.fund-item--popular { border-color: var(--orange); }
.fund-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--gray-50);
  border-bottom: 1px solid var(--border);
}
.fund-item--popular .fund-header { background: #fff5ee; border-bottom-color: #ffe0cc; }
.fund-badge {
  font-size: 10px;
  font-weight: 700;
  background: var(--orange);
  color: #fff;
  padding: 2px 7px;
  border-radius: 2px;
  white-space: nowrap;
  flex-shrink: 0;
}
.fund-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
}
.fund-body { padding: 12px 14px; }
.fund-specs { display: flex; flex-direction: column; gap: 6px; margin-bottom: 10px; }
.fund-spec { display: flex; align-items: baseline; gap: 8px; font-size: 12px; }
.fund-spec dt { color: var(--text-muted); white-space: nowrap; min-width: 70px; flex-shrink: 0; }
.fund-spec dd { color: var(--text-sub); line-height: 1.5; }
.fund-spec dd strong { color: var(--text); font-size: 13px; }
.fund-tag-wrap { display: flex; gap: 6px; flex-wrap: wrap; }

/* ============================================================
   CARD TAGS
   ============================================================ */
.card-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 2px;
}
.tag-free     { background: #e8f5e9; color: #2e7d32; border: 1px solid #a5d6a7; }
.tag-point    { background: #fff3e0; color: #e65100; border: 1px solid #ffcc80; }
.tag-security { background: #e3f2fd; color: #1565c0; border: 1px solid #90caf9; }
.tag-travel   { background: #e8eaf6; color: #283593; border: 1px solid #9fa8da; }

/* ============================================================
   COMBO BOX（NISAとの組み合わせ）
   ============================================================ */
.combo-box {
  display: flex;
  align-items: stretch;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  margin-bottom: 16px;
}
@media (max-width: 640px) {
  .combo-box { flex-direction: column; }
  .combo-plus { writing-mode: horizontal-tb; transform: rotate(90deg); }
}
.combo-item {
  flex: 1;
  padding: 14px;
  background: var(--gray-50);
}
.combo-item:first-child { background: #fff5ee; }
.combo-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
}
.combo-item p { font-size: 12px; color: var(--text-sub); line-height: 1.6; margin: 0; }
.combo-plus {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 10px;
  font-size: 20px;
  font-weight: 300;
  color: var(--text-muted);
  background: var(--surface);
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
}
.combo-result {
  flex: 1;
  padding: 14px;
  background: #f0fff0;
  border-left: 1px solid #a5d6a7;
}
.combo-result-label {
  font-size: 12px;
  font-weight: 700;
  color: #2e7d32;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
}
.combo-result p { font-size: 12px; color: var(--text-sub); line-height: 1.6; margin: 0; }

/* ============================================================
   TIPS LIST
   ============================================================ */
.tips-list { display: flex; flex-direction: column; gap: 0; }
.tip-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.tip-item:last-child { border-bottom: none; padding-bottom: 0; }
.tip-num {
  flex-shrink: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--gray-100);
  line-height: 1;
  min-width: 28px;
  text-align: right;
  padding-top: 2px;
}
.tip-content h3 { font-size: 14px; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.tip-content p { font-size: 13px; color: var(--text-sub); line-height: 1.7; margin: 0; }

/* ============================================================
   STEPS LIST
   ============================================================ */
.steps-list { display: flex; flex-direction: column; gap: 10px; }
.step-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 14px;
  background: var(--gray-50);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
}
.step-num {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: var(--orange);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  margin-top: 1px;
}
.step-title { font-size: 14px; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.step-content p { font-size: 12px; color: var(--text-sub); line-height: 1.7; margin: 0; }

/* ============================================================
   FAQ
   ============================================================ */
.faq-body { padding: 0; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:last-child { border-bottom: none; }
.faq-q {
  list-style: none;
  padding: 12px 14px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  user-select: none;
}
.faq-q::-webkit-details-marker { display: none; }
.faq-q::before {
  content: 'Q';
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  background: var(--red);
  color: #fff;
  border-radius: 50%;
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}
.faq-q::after {
  content: '▼';
  flex-shrink: 0;
  font-size: 10px;
  color: var(--text-muted);
  transition: transform 0.2s;
  margin-left: auto;
}
.faq-item[open] .faq-q::after { transform: rotate(180deg); }
.faq-q:hover { background: var(--gray-50); }
.faq-a {
  padding: 10px 14px 14px 48px;
  border-top: 1px solid var(--border);
  background: var(--gray-50);
}
.faq-a p { font-size: 13px; color: var(--text-sub); line-height: 1.75; margin: 0; }

/* ============================================================
   DISCLAIMER BOX
   ============================================================ */
.disclaimer-box {
  padding: 10px 14px;
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.7;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--surface);
  margin-bottom: 12px;
}

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar-widget {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  margin-bottom: 12px;
}
.sidebar-widget:last-child { margin-bottom: 0; }
.sidebar-widget-head {
  padding: 8px 12px;
  background: var(--gray-50);
  border-bottom: 1px solid var(--border);
  border-left: 3px solid var(--red);
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
}
.sidebar-widget-head--warn { border-left-color: #c84f14; color: #c84f14; }
.sidebar-widget-body { padding: 10px 12px; }
.related-list { display: flex; flex-direction: column; gap: 8px; }
.related-list li {
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  line-height: 1.5;
}
.related-list li:last-child { border-bottom: none; padding-bottom: 0; }
.related-list a { color: var(--link); }
.related-list a:hover { text-decoration: underline; }
.sidebar-disclaimer { font-size: 11px; color: var(--text-muted); line-height: 1.7; }
.sidebar-note { font-size: 10px; color: var(--text-muted); margin-top: 6px; line-height: 1.5; }

/* ============================================================
   COST LIST（サイドバー）
   ============================================================ */
.cost-list { display: flex; flex-direction: column; gap: 0; }
.cost-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  border-bottom: 1px dotted var(--border);
  font-size: 12px;
  gap: 6px;
}
.cost-list li:last-child { border-bottom: none; }
.cost-name { color: var(--text-sub); flex: 1; line-height: 1.4; }
.cost-val { font-weight: 700; color: #2e7d32; white-space: nowrap; }
.cost-val.cost-high { color: #c0392b; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: #222;
  color: #aaa;
  text-align: center;
  padding: 20px 16px;
  font-size: 12px;
  line-height: 1.8;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 16px;
  margin-bottom: 8px;
}
.footer-links a { color: #aaa; }
.footer-links a:hover { color: #fff; text-decoration: none; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 480px) {
  .step-item { flex-direction: column; gap: 8px; }
  .faq-a { padding: 10px 12px 12px; }
  .fund-spec { flex-direction: column; gap: 2px; }
  .fund-spec dt { min-width: auto; }
}