:root {
  --bg: #fffaf6;
  --surface: #ffffff;
  --text: #3d3a4b;
  --muted: #7a7590;
  --line: #efe6f2;
  --pink: #ffd6e0;
  --pink-deep: #e0607e;
  --mint: #cdf3e4;
  --lavender: #e6defc;
  --lavender-deep: #6b5bc4;
  --peach: #ffe6cc;
  --sky: #d6ecff;
  --lemon: #fff4bf;
  --sky-deep: #2c62b8;
  --row: #fcf9ff;
  --nav-bg: rgba(255, 255, 255, .65);
  --shadow: rgba(107, 91, 196, .12);
  --thumb-filter: none;
  --radius: 14px;
  --logo-marker: #fff1a8;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1c1a25;
    --surface: #26232f;
    --text: #ece8f5;
    --muted: #aaa4bd;
    --line: #3a3548;
    --pink: #4b2d3b;
    --pink-deep: #ff9fb6;
    --mint: #234238;
    --lavender: #342e50;
    --lavender-deep: #b9adff;
    --peach: #463628;
    --sky: #243952;
    --sky-deep: #9cc8ff;
    --lemon: #423c22;
    --row: #2b2836;
    --nav-bg: rgba(28, 26, 37, .55);
    --shadow: rgba(0, 0, 0, .35);
    --thumb-filter: brightness(.88) saturate(.9);
    --logo-marker: rgba(255, 159, 182, .22);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #1c1a25;
  --surface: #26232f;
  --text: #ece8f5;
  --muted: #aaa4bd;
  --line: #3a3548;
  --pink: #4b2d3b;
  --pink-deep: #ff9fb6;
  --mint: #234238;
  --lavender: #342e50;
  --lavender-deep: #b9adff;
  --peach: #463628;
  --sky: #243952;
  --sky-deep: #9cc8ff;
  --lemon: #423c22;
  --row: #2b2836;
  --nav-bg: rgba(28, 26, 37, .55);
  --shadow: rgba(0, 0, 0, .35);
  --thumb-filter: brightness(.88) saturate(.9);
  --logo-marker: rgba(255, 159, 182, .22);
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", Meiryo, sans-serif;
  line-height: 1.75;
}
a { color: var(--lavender-deep); }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

/* ヘッダー */
.site-header { background: linear-gradient(90deg, var(--pink), var(--lavender) 50%, var(--sky)); }
.header-inner { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; padding-top: 18px; padding-bottom: 14px; }
.theme-toggle {
  margin-left: auto; align-self: center; font: inherit; font-size: 13px; cursor: pointer;
  padding: 4px 14px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--surface); color: var(--text);
}
.theme-toggle .icon-light { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-light { display: inline; }
:root[data-theme="dark"] .theme-toggle .icon-dark { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-light { display: inline; }
  :root:not([data-theme="light"]) .theme-toggle .icon-dark { display: none; }
}
.logo { display: inline-flex; align-items: center; gap: 10px; align-self: center; color: var(--text); text-decoration: none; }
.logo-icon { width: 34px; height: 41px; flex: none; filter: drop-shadow(0 3px 6px var(--shadow)); transform: rotate(-6deg); transition: transform .2s; }
.logo:hover .logo-icon { transform: rotate(0deg) scale(1.05); }
.logo-stop-a { stop-color: #f0567c; }
.logo-stop-b { stop-color: #6b5bc4; }
.logo-bolt { fill: #fff; }
.logo-text { font-size: 28px; font-weight: 900; line-height: 1; letter-spacing: .01em; white-space: nowrap; }
.logo-sim {
  background: linear-gradient(135deg, var(--pink-deep), var(--lavender-deep)); -webkit-background-clip: text; background-clip: text;
  color: transparent; letter-spacing: .03em; margin-right: 2px;
}
.logo-toku { color: var(--pink-deep); position: relative; }
.logo-toku::after {
  content: ""; position: absolute; left: -2px; right: -2px; bottom: 1px; height: .32em;
  background: var(--logo-marker); border-radius: 4px; z-index: -1;
}
.logo-news { color: var(--text); }
.logo-text { position: relative; z-index: 0; }
.tagline { margin: 0; color: var(--muted); font-size: 13px; }
.carrier-nav { background: var(--nav-bg); border-top: 1px solid var(--line); }
.carrier-nav .wrap { display: flex; gap: 6px; overflow-x: auto; padding-top: 8px; padding-bottom: 8px; scrollbar-width: none; }
.carrier-nav a {
  flex: none; padding: 4px 14px; border-radius: 999px; background: var(--surface);
  color: var(--text); text-decoration: none; font-size: 14px; border: 1px solid var(--line);
}
.carrier-nav a:hover { background: var(--lemon); }

/* レイアウト */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 28px; padding-top: 24px; padding-bottom: 40px; }
@media (max-width: 860px) { .layout { grid-template-columns: minmax(0, 1fr); } }

/* 記事一覧（GIGAZINE風：サムネ＋タイトル＋リードを縦に並べる） */
.list-heading { font-size: 20px; margin: 0 0 8px; }
.date-heading {
  font-size: 15px; margin: 24px 0 10px; padding: 6px 12px; border-radius: 8px;
  background: var(--lavender); color: var(--lavender-deep);
}
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 14px; transition: transform .15s, box-shadow .15s; }
.card:hover { transform: translateY(-2px); box-shadow: 0 6px 18px var(--shadow); }
.card-link { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 18px; padding: 14px; color: inherit; text-decoration: none; }
.card-title { font-size: 19px; line-height: 1.45; margin: 0 0 6px; }
.card-meta { margin: 0 0 6px; font-size: 13px; color: var(--muted); display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.card-lead { margin: 0 0 8px; font-size: 14px; }
.card-tags { margin: 0; display: flex; gap: 6px; flex-wrap: wrap; }
.tag { font-size: 12px; padding: 1px 10px; border-radius: 999px; background: var(--mint); }
@media (max-width: 600px) {
  .card-link { grid-template-columns: 1fr; gap: 10px; padding: 12px; }
  .card-title { font-size: 17px; }
}

/* サムネイル（画像の代わりにキャリア色のカード） */
.thumb {
  aspect-ratio: 16 / 9; border-radius: 10px; background: var(--tbg);
  display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center;
  padding: 10px; color: var(--tfg); position: relative; overflow: hidden; filter: var(--thumb-filter);
}
.thumb::after {
  content: ""; position: absolute; width: 60%; aspect-ratio: 1; border-radius: 50%;
  background: rgba(255,255,255,.45); right: -18%; top: -30%;
}
.thumb-carrier { font-size: 13px; font-weight: 700; background: rgba(255,255,255,.75); color: #3d3a4b; border-radius: 999px; padding: 0 10px; z-index: 1; }
.thumb-label { font-size: 22px; font-weight: 800; line-height: 1.3; margin-top: 6px; z-index: 1; }
.thumb-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 2; }
.thumb-large { margin: 16px 0 4px; }
.credit { font-size: 12px; color: var(--muted); margin: 0 0 16px; text-align: right; }
.thumb-large .thumb-label { font-size: clamp(24px, 5vw, 40px); }

/* バッジ */
.badge { font-size: 12px; padding: 0 8px; border-radius: 6px; background: var(--sky); color: var(--sky-deep); }
.badge-soon { background: var(--pink); color: var(--pink-deep); font-weight: 700; }
.badge-ended { background: var(--line); color: var(--muted); }

/* サイドバー */
.side-box { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 16px; }
.side-box h2 { font-size: 15px; margin: -14px -16px 10px; padding: 8px 16px; border-radius: var(--radius) var(--radius) 0 0; }
.side-pink h2 { background: var(--pink); }
.side-mint h2 { background: var(--mint); }
.side-lavender h2 { background: var(--lavender); }
.side-categories li a { display: flex; justify-content: space-between; align-items: center; color: var(--text); text-decoration: none; }
.side-categories li a:hover { color: var(--lavender-deep); }
.count { font-size: 12px; min-width: 24px; text-align: center; border-radius: 999px; background: var(--lavender); color: var(--lavender-deep); padding: 0 8px; }
.side-box ul { list-style: none; margin: 0; padding: 0; }
.side-box li { padding: 6px 0; border-bottom: 1px dashed var(--line); font-size: 14px; line-height: 1.5; }
.side-box li:last-child { border-bottom: 0; }
.side-date { display: block; font-size: 12px; color: var(--pink-deep); }
.side-carriers { display: flex; flex-wrap: wrap; gap: 6px; }
.side-carriers li { border: 0; padding: 0; }
.side-carriers a { display: inline-block; padding: 2px 12px; border-radius: 999px; background: var(--lemon); color: var(--text); text-decoration: none; }

/* サイドバー：ランキング・おすすめ・X */
.side-peach h2 { background: var(--peach); }
.side-sky h2 { background: var(--sky); }
.side-ranking a, .side-picks a { color: var(--text); text-decoration: none; }
.side-ranking a:hover, .side-picks a:hover { color: var(--lavender-deep); }
.side-carrier {
  display: inline-block; font-size: 11px; font-weight: 700; border-radius: 999px; padding: 0 8px; margin-right: 6px;
  background: var(--tbg); color: var(--tfg); filter: var(--thumb-filter); vertical-align: 1px;
}
.side-ranking { counter-reset: rank; list-style: none; margin: 0; padding: 0; }
.side-ranking li { counter-increment: rank; position: relative; padding-left: 34px; }
.side-ranking li:not(.side-empty)::before {
  content: counter(rank); position: absolute; left: 0; top: 7px; width: 24px; height: 24px; border-radius: 50%;
  display: grid; place-items: center; font-size: 13px; font-weight: 800; background: var(--line); color: var(--muted);
}
.side-ranking li:nth-child(1)::before { background: #f6c945; color: #5a4300; }
.side-ranking li:nth-child(2)::before { background: #c9cfd8; color: #3d4450; }
.side-ranking li:nth-child(3)::before { background: #e3a477; color: #5b2f10; }
.side-ranking li.side-empty { padding-left: 0; }
.side-views { display: block; font-size: 12px; color: var(--muted); }
.side-empty { color: var(--muted); }
.side-note { margin: 0 0 4px; font-size: 12px; color: var(--muted); }
.side-note:empty { display: none; }
.side-x h2 { background: var(--text); color: var(--bg); }
.side-x p { margin: 0 0 10px; font-size: 14px; }
.x-follow {
  display: flex; justify-content: center; align-items: center; gap: 8px; padding: 8px 12px; border-radius: 999px;
  background: #0f1419; color: #fff; font-weight: 700; text-decoration: none;
}
.x-follow:hover { opacity: .85; }
:root[data-theme="dark"] .x-follow { background: #fff; color: #0f1419; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .x-follow { background: #fff; color: #0f1419; } }
.x-logo { font-size: 18px; line-height: 1; }

/* 記事ページ */
.article { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px clamp(16px, 4vw, 36px); }
.article-meta { font-size: 13px; color: var(--muted); margin: 0; display: flex; gap: 8px; align-items: center; }
.article-title { font-size: clamp(22px, 3.4vw, 30px); line-height: 1.4; margin: 6px 0 10px; }
.period { background: var(--lemon); border-radius: 10px; padding: 8px 14px; font-weight: 700; }
.article-body h2 { font-size: 20px; border-left: 6px solid var(--pink); padding-left: 10px; margin-top: 32px; }
.article-body h3 { font-size: 17px; margin-top: 24px; }
.article-body ul { padding-left: 1.3em; }
.note { background: var(--peach); border-radius: 10px; padding: 10px 14px; font-size: 14px; margin: 16px 0; }
.table-wrap { overflow-x: auto; margin: 16px 0; }
table { border-collapse: collapse; width: 100%; min-width: 480px; font-size: 14px; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--lavender); }
tbody tr:nth-child(even) { background: var(--row); }
.source { font-size: 13px; color: var(--muted); word-break: break-all; }
.back { margin-top: 24px; }

.site-footer { background: var(--lavender); color: var(--muted); font-size: 13px; padding: 20px 0; }
.site-footer p { margin: 4px 0; }
@media (max-width: 600px) {
  .logo-icon { width: 28px; height: 34px; }
  .logo-text { font-size: 24px; }
  .tagline { order: 3; width: 100%; }
  .theme-toggle { order: 2; }
}