/* =========================================================================
   アメックス & セゾンAMEX 比較ノート — stylesheet
   Design spine: three "worlds" (本家 / 提携 / セゾン) as a consistent colour key.
   Quiet editorial reference; one warm accent (brass); Japanese-first typography.
   ========================================================================= */

:root{
  /* surfaces */
  --bg:#eef0ee;
  --paper:#ffffff;
  --fill:#f5f6f7;          /* table headers, soft chips */
  --fill-2:#fafbfc;        /* zebra */

  /* ink */
  --ink:#171a1e;
  --ink-2:#3f454d;
  --muted:#6f767e;
  --line:#e0e3e6;
  --line-2:#cdd2d7;

  /* one accent: brass */
  --accent:#8a6a2c;
  --accent-ink:#6c521e;
  --accent-soft:#f3ecdd;

  /* the three worlds */
  --w-honke:#2f3b66;   --w-honke-soft:#edeff6;
  --w-teikei:#2c6e60;  --w-teikei-soft:#e8f1ee;
  --w-saison:#6e4a72;  --w-saison-soft:#f3eef4;

  --max:1080px;
  --nav:236px;
  --radius:11px;

  --font:"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic","YuGothic","Noto Sans JP","Meiryo",system-ui,sans-serif;
  --font-index:Georgia,"Hiragino Mincho ProN","Yu Mincho",serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  font-feature-settings:"palt" 1;          /* tighter JP spacing */
}
a{color:var(--accent-ink);text-underline-offset:.18em;text-decoration-thickness:.07em}
a:hover{color:var(--accent)}
button,input,select{font:inherit}
:focus-visible{outline:2.5px solid var(--accent);outline-offset:2px;border-radius:4px}
.tabular{font-variant-numeric:tabular-nums}

/* ---------- Header / hero ---------- */
.hero{background:var(--paper);border-bottom:1px solid var(--line)}
.hero__inner{max-width:var(--max);margin:0 auto;padding:72px 24px 48px}
.hero__kicker{
  font-family:var(--font-index);font-style:italic;font-size:15px;letter-spacing:.04em;
  color:var(--accent-ink);margin:0 0 18px;
}
.hero__title{
  margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.22;
  font-size:clamp(30px,5.4vw,52px);
}
.hero__lead{margin:22px 0 0;max-width:64ch;color:var(--ink-2);font-size:17px;line-height:1.95}
.hero__meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:30px}
.worldChip{
  display:inline-flex;align-items:center;gap:7px;
  border:1px solid var(--line);background:var(--paper);border-radius:999px;
  padding:6px 13px 6px 11px;font-size:13.5px;font-weight:700;color:var(--ink-2);
}
.worldChip i{width:9px;height:9px;border-radius:50%;display:inline-block}
.metaTag{
  font-size:13px;color:var(--muted);padding:6px 12px;border:1px dashed var(--line-2);
  border-radius:999px;background:transparent;
}
.metaTag b{color:var(--ink);font-weight:800}

/* ---------- Shell / nav ---------- */
.shell{
  display:grid;grid-template-columns:var(--nav) minmax(0,1fr);gap:44px;
  max-width:1380px;margin:0 auto;padding:36px 24px 96px;
}
.siteNav{position:sticky;top:24px;align-self:start;max-height:calc(100vh - 48px);overflow:auto}
.siteNav__home{
  display:block;font-weight:800;letter-spacing:-.01em;color:var(--ink);text-decoration:none;
  font-size:15px;line-height:1.45;padding-bottom:14px;margin-bottom:10px;border-bottom:1px solid var(--line);
}
.siteNav__list{display:flex;flex-direction:column;gap:1px}
.siteNav__link{
  display:flex;align-items:baseline;gap:9px;text-decoration:none;color:var(--ink-2);
  font-size:14px;padding:7px 10px;border-radius:8px;line-height:1.4;
}
.siteNav__link .n{font-family:var(--font-index);font-size:12px;color:var(--muted);min-width:18px}
.siteNav__link:hover{background:var(--accent-soft);color:var(--accent-ink)}
.siteNav__link.is-active{background:var(--accent-soft);color:var(--accent-ink);font-weight:700}
.siteNav__link.is-active .n{color:var(--accent-ink)}

/* ---------- Section scaffolding (open, editorial — not boxed cards) ---------- */
main{min-width:0;max-width:var(--max)}
.sec{padding-top:40px;margin-top:40px;border-top:1px solid var(--line)}
.sec:first-child{padding-top:0;margin-top:0;border-top:0}
.sec__index{font-family:var(--font-index);font-size:14px;color:var(--accent-ink);letter-spacing:.02em;margin-bottom:6px}
.sec__title{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.3;font-size:clamp(22px,3.1vw,30px)}
.sec__lead{margin:14px 0 26px;max-width:70ch;color:var(--ink-2);font-size:15.5px;line-height:1.9}
.subhead{margin:42px 0 6px;font-weight:800;letter-spacing:-.01em;font-size:21px;line-height:1.4}
.subhead + .sub__lead{margin:10px 0 22px;max-width:70ch;color:var(--ink-2);font-size:15px}

.callout{
  margin:0 0 24px;padding:15px 18px;border:1px solid var(--line);border-left:4px solid var(--accent);
  border-radius:10px;background:var(--accent-soft);color:#4a3c1c;font-size:14.5px;line-height:1.85;
}
.callout b{color:var(--accent-ink)}

/* ---------- World cards (the colour key in action) ---------- */
.worldGrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.worldCard{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.worldCard__bar{height:5px}
.worldCard__body{padding:20px 20px 22px}
.worldCard h3{margin:0 0 4px;font-size:20px;letter-spacing:-.01em}
.worldCard .ct{font-size:12px;font-weight:800;letter-spacing:.04em;color:var(--muted);margin-bottom:12px}
.worldCard .tagline{margin:0 0 16px;font-size:14.5px;color:var(--ink-2);line-height:1.85}
.worldCard dl{margin:0;display:grid;gap:11px}
.worldCard dt{font-size:11.5px;font-weight:800;letter-spacing:.06em;color:var(--accent-ink);margin-bottom:2px}
.worldCard dd{margin:0;font-size:13.5px;color:var(--ink-2);line-height:1.8}

/* ---------- Tables ---------- */
.tableWrap{position:relative;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper);overflow:hidden}
.tableScroll{overflow-x:auto}
.tableWrap.is-scrollable .tableScroll::after{content:""}
table.grid{width:100%;border-collapse:separate;border-spacing:0;font-size:14px;line-height:1.75;font-variant-numeric:tabular-nums}
table.grid th,table.grid td{padding:12px 15px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
table.grid thead th{
  background:var(--fill);font-size:12.5px;font-weight:800;color:var(--ink-2);
  letter-spacing:.02em;white-space:nowrap;border-bottom:1px solid var(--line-2);
}
table.grid tbody tr:last-child td{border-bottom:0}
table.grid tbody tr:nth-child(even) td{background:var(--fill-2)}
/* sticky first column for wide tables */
table.grid.sticky1 th:first-child,
table.grid.sticky1 td:first-child{
  position:sticky;left:0;z-index:1;background:var(--paper);
  border-right:1px solid var(--line-2);font-weight:800;color:var(--ink);
}
table.grid.sticky1 tbody tr:nth-child(even) td:first-child{background:var(--fill-2)}
table.grid td:first-child{font-weight:700;color:var(--ink)}
.cellHi{display:block;font-weight:800;color:var(--accent-ink)}
.miniUrl{display:block;margin-top:5px;color:var(--muted);font-size:11.5px;overflow-wrap:anywhere}
.external{font-weight:700}
.external::after{content:"  ↗";font-size:.85em;color:var(--muted)}

/* per-table widths */
#tbl-pp{min-width:780px}
#tbl-points{min-width:760px}
#tbl-status{min-width:720px}
#tbl-features{min-width:700px}
#tbl-diff{min-width:560px}
.usageTable{min-width:840px}
.exchangeTable{min-width:900px}
.timingTable{min-width:880px}
.misreadTable{min-width:760px}
.checkedTable{min-width:720px}
.phoneTable{min-width:640px}
.compareTable{min-width:560px}
.compareTable th:not(:first-child),.compareTable td:not(:first-child){min-width:230px}
.phoneTable td:nth-child(2){font-weight:800;white-space:nowrap;color:var(--ink)}
.checkedTable td:nth-child(2){font-weight:800;color:var(--accent-ink);white-space:nowrap}
.usageTable td:nth-child(3),.misreadTable td:nth-child(2){min-width:240px}
.misreadTable td:nth-child(2){background:#fffdf6}
.spendTable{min-width:520px}
.spendTable td:first-child{white-space:nowrap;width:1%;color:var(--accent-ink)}
.quickTable{min-width:760px}
.quickTable td:nth-child(2),.quickTable td:nth-child(3){font-weight:700}

/* ---------- Purpose / budget meta ---------- */
.legendRow{display:flex;flex-wrap:wrap;gap:14px;margin:-6px 0 20px;font-size:13px;color:var(--muted)}
.legendRow .sw{display:inline-flex;align-items:center;gap:6px}
.legendRow .sw i{width:11px;height:11px;border-radius:3px;display:inline-block}

/* ---------- Finder ---------- */
.controls{display:grid;grid-template-columns:minmax(240px,1.8fr) repeat(3,minmax(120px,1fr));gap:12px;margin-bottom:14px}
.controls label{display:grid;gap:6px;font-size:11.5px;font-weight:800;letter-spacing:.04em;color:var(--muted)}
.controls input,.controls select{
  width:100%;border:1px solid var(--line-2);border-radius:9px;background:var(--paper);
  padding:11px 12px;color:var(--ink);
}
.controls input:focus,.controls select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.tagShelf{display:flex;flex-wrap:wrap;gap:7px;margin:8px 0 18px}
.tag{
  border:1px solid var(--line-2);border-radius:999px;background:var(--paper);
  padding:6px 12px;font-size:12.5px;color:var(--ink-2);cursor:pointer;line-height:1.4;
}
.tag:hover{border-color:var(--accent);color:var(--accent-ink)}
.tag.is-active{background:var(--ink);border-color:var(--ink);color:#fff}
.resultLine{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;color:var(--muted);font-size:13.5px}
.linkBtn{border:0;background:none;color:var(--accent-ink);font-weight:800;cursor:pointer;padding:0;font-size:13.5px}
.linkBtn:hover{color:var(--accent)}

.cardGrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.cardItem{
  position:relative;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 18px 18px 21px;display:flex;flex-direction:column;
}
.cardItem::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;border-radius:var(--radius) 0 0 var(--radius);background:var(--c,var(--line-2))}
.cardItem__head{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.worldTag{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:800;letter-spacing:.03em;color:var(--ink-2)}
.worldTag i{width:8px;height:8px;border-radius:50%;display:inline-block;background:var(--c)}
.feeTag{font-size:12.5px;font-weight:800;color:var(--ink);white-space:nowrap}
.cardItem h3{margin:9px 0 2px;font-size:18px;letter-spacing:-.01em;line-height:1.4}
.cardItem .brand{font-size:12px;color:var(--muted);margin-bottom:10px}
.cardItem .row{margin:5px 0;font-size:13.5px;color:var(--ink-2);line-height:1.8}
.cardItem .row b{color:var(--ink);font-weight:800}
.cardItem .row.warn b{color:var(--accent-ink)}
.scoreRow{display:grid;grid-template-columns:auto 1fr;gap:5px 10px;margin:13px 0 4px;align-items:center}
.scoreRow .lab{font-size:11.5px;color:var(--muted);white-space:nowrap}
.dots{display:inline-flex;gap:3px}
.dots i{width:7px;height:7px;border-radius:50%;background:#dfe3e6;display:inline-block}
.dots i.on{background:var(--c,var(--accent))}
.chipRow{display:flex;flex-wrap:wrap;gap:6px;margin:13px 0 0}
.chip{font-size:11.5px;color:var(--muted);background:var(--fill);border:1px solid var(--line);border-radius:6px;padding:3px 8px}
.cardItem__foot{display:flex;flex-wrap:wrap;gap:8px;margin-top:15px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;cursor:pointer;
  border:1px solid var(--line-2);border-radius:8px;background:var(--paper);
  padding:8px 13px;font-size:13px;font-weight:800;color:var(--ink);text-decoration:none;
}
.btn:hover{border-color:var(--accent);color:var(--accent-ink)}
.btn.is-primary{background:var(--ink);border-color:var(--ink);color:#fff}
.btn.is-primary:hover{background:#000;color:#fff}
.btn.is-on{background:var(--accent);border-color:var(--accent);color:#fff}

/* ---------- Compare ---------- */
.emptyNote{border:1px dashed var(--line-2);border-radius:var(--radius);padding:22px;color:var(--muted);background:var(--paper);font-size:14px}
.compareBox[hidden]{display:none}

/* ---------- Tabs ---------- */
.tabBar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.tab{border:1px solid var(--line-2);background:var(--paper);color:var(--ink-2);border-radius:999px;padding:8px 14px;cursor:pointer;font-weight:800;font-size:13.5px}
.tab:hover{border-color:var(--accent);color:var(--accent-ink)}
.tab.is-active{background:var(--ink);border-color:var(--ink);color:#fff}

/* ---------- Profiles ---------- */
.profileList{display:flex;flex-direction:column;gap:10px}
.profile{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.profile > summary{
  list-style:none;display:flex;align-items:center;gap:13px;padding:15px 18px;cursor:pointer;
}
.profile > summary::-webkit-details-marker{display:none}
.profile > summary .dot{width:9px;height:9px;border-radius:50%;background:var(--c);flex:none}
.profile > summary .nm{font-weight:800;font-size:16px;letter-spacing:-.01em;flex:1;min-width:0}
.profile > summary .fee{color:var(--muted);font-size:12.5px;white-space:nowrap}
.profile > summary .car{color:var(--muted);font-size:13px;transition:transform .15s ease}
.profile[open] > summary{border-bottom:1px solid var(--line);background:var(--fill)}
.profile[open] > summary .car{transform:rotate(180deg)}
.profileBody{padding:18px}
.fieldGrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}
.field{border:1px solid var(--line);border-radius:9px;padding:12px 13px;background:var(--paper)}
.field b{display:block;font-size:11px;font-weight:800;letter-spacing:.05em;color:var(--accent-ink);margin-bottom:4px}
.field span{display:block;color:var(--ink-2);font-size:13.5px;line-height:1.8}
.field.wide{grid-column:1 / -1}

/* ---------- Sources / checks / contact ---------- */
.twoCol{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:8px}
.panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px}
.panel h3{margin:0 0 12px;font-size:17px}
.panel ul{margin:0;padding-left:1.25em}
.panel li{margin:.55em 0;font-size:14px;color:var(--ink-2);line-height:1.8}

.sourceGroups{display:flex;flex-direction:column;gap:22px}
.sourceGroup h3{margin:0 0 10px;font-size:14px;font-weight:800;letter-spacing:.02em;color:var(--accent-ink);display:flex;align-items:center;gap:10px}
.sourceGroup h3::after{content:"";flex:1;height:1px;background:var(--line)}
.sourceList{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.sourceItem{border:1px solid var(--line);border-radius:10px;background:var(--paper);padding:13px 15px}
.sourceItem a{font-weight:800;font-size:14px}
.sourceItem p{margin:6px 0 0;color:var(--muted);font-size:12.5px;line-height:1.7}

/* ---------- Footer / floating ---------- */
.foot{max-width:var(--max);margin:0 auto;padding:8px 24px 60px;color:var(--muted);font-size:12.5px;line-height:1.85}
.foot .disc{border-top:1px solid var(--line);padding-top:22px;max-width:74ch}
.floatBar{
  position:fixed;left:50%;bottom:18px;transform:translateX(-50%);z-index:30;
  display:flex;align-items:center;gap:14px;background:var(--ink);color:#fff;
  border-radius:999px;padding:9px 12px 9px 18px;box-shadow:0 14px 40px rgba(0,0,0,.28);font-size:13.5px;
}
.floatBar[hidden]{display:none}
.floatBar b{font-weight:800}
.floatBar a{color:#fff;font-weight:800;text-decoration:underline}
.floatBar button{border:1px solid rgba(255,255,255,.3);background:transparent;color:#fff;border-radius:999px;padding:5px 12px;cursor:pointer}
.floatBar button:hover{background:rgba(255,255,255,.12)}

/* ---------- Responsive ---------- */
@media (max-width:1040px){
  .shell{grid-template-columns:1fr;gap:0}
  .siteNav{position:static;max-height:none;margin-bottom:28px;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper);padding:14px 16px}
  .siteNav__list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:2px}
  .worldGrid{grid-template-columns:1fr}
  .sourceList{grid-template-columns:1fr}
}
@media (max-width:760px){
  .hero__inner{padding:52px 20px 38px}
  .shell{padding:28px 20px 90px}
  .controls{grid-template-columns:1fr 1fr}
  .cardGrid{grid-template-columns:1fr}
  .fieldGrid{grid-template-columns:1fr}
  .twoCol{grid-template-columns:1fr}
  .siteNav__list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .floatBar{left:12px;right:12px;transform:none;border-radius:14px;flex-wrap:wrap;justify-content:center}
}
@media (max-width:520px){
  .controls{grid-template-columns:1fr}
  .siteNav__list{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto !important;transition:none !important}
}