/* Y-FILTER. の紹介ページ。拡張機能の welcome.html（初期画面）と同じデザイン
   ダークモード（assets/site.css と同じ条件）では、下の .yf-page の変数だけを入れ替える */
.yf-page {
  --yf-ink: #f6f3ec;
  --yf-ink-2: #ffffff;
  --yf-line: rgba(15, 18, 22, .08);
  --yf-line-strong: rgba(15, 18, 22, .15);
  --yf-tint: rgba(15, 18, 22, .03);
  --yf-tint-hover: rgba(15, 18, 22, .06);
  --yf-text: #0f1216;
  --yf-muted: #525a68;
  --yf-faint: #8a91a1;
  --yf-accent: #ffc83d;
  --yf-accent-ink: #1a1204;
  --yf-accent-text: #8a5a00;
  --yf-accent-soft: #fff3d1;
  --yf-accent-border: #f0c96a;
  --yf-accent-glow: rgba(240, 170, 30, .28);
  --yf-danger: #c4321f;
  --yf-danger-soft: #fde8e5;
  --yf-grid-glow: rgba(255, 200, 61, .45);
  --yf-shadow-lg: 0 24px 60px rgba(20, 28, 45, .12);
  --yf-display: "Space Grotesk", "Noto Sans JP", "Noto Sans CJK JP", "Hiragino Sans", "Yu Gothic UI", Meiryo, system-ui, sans-serif;
  background: var(--yf-ink);
}
.yf-page::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(900px 500px at 85% -10%, var(--yf-grid-glow), transparent 60%),
    linear-gradient(var(--yf-line) 1px, transparent 1px) 0 0 / 64px 64px,
    linear-gradient(90deg, var(--yf-line) 1px, transparent 1px) 0 0 / 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, .35) 55%, transparent 100%);
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, .35) 55%, transparent 100%);
}
.yf { color: var(--yf-text); }
.yf .wrap { max-width: 1120px; padding: 0 28px; }

/* ---------- Hero ---------- */
.yf-hero { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; padding: 64px 0 88px; }
.yf-top { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.yf-wordmark { display: flex; align-items: center; gap: 12px; font-family: var(--yf-display); font-weight: 700; font-size: 22px; letter-spacing: -.02em; }
.yf-wordmark img { width: 34px; height: 34px; border-radius: 9px; box-shadow: 0 6px 20px rgba(200, 130, 20, .35); }
.yf-wordmark b { color: var(--yf-accent-text); }
.yf-tag { font-family: var(--yf-display); font-size: 12px; font-weight: 700; color: var(--yf-accent-text); background: var(--yf-accent-soft); border: 1px solid var(--yf-accent-border); padding: 3px 12px; border-radius: 999px; }
.yf-eyebrow { display: inline-flex; align-items: center; gap: 10px; margin-top: 28px; font-family: var(--yf-display); font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--yf-accent-text); }
.yf-eyebrow::before { content: ""; width: 28px; height: 1px; background: currentColor; }
.yf h1 { font-size: clamp(32px, 4.6vw, 56px); font-weight: 900; line-height: 1.2; letter-spacing: -.02em; margin: 18px 0 22px; }
.yf h1 .nb { display: inline-block; }
.yf h1 em { font-style: normal; color: var(--yf-accent-text); }
.yf-lead { font-size: 16px; color: var(--yf-muted); max-width: 520px; }
.yf-cta { display: flex; gap: 12px; margin-top: 34px; flex-wrap: wrap; }
.yf-region-note { margin: 14px 0 0; font-size: 13px; line-height: 1.6; color: var(--yf-faint); }

.yf-btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; border: 1px solid transparent; border-radius: 12px; padding: 13px 22px; font: inherit; font-size: 14.5px; font-weight: 700; cursor: pointer; text-decoration: none; color: var(--yf-text); transition: transform 140ms ease, background 140ms ease, box-shadow 140ms ease; }
.yf-btn:active { transform: translateY(1px); }
.yf-btn svg { width: 16px; height: 16px; }
.yf-btn-accent { background: var(--yf-accent); color: var(--yf-accent-ink); box-shadow: 0 8px 30px var(--yf-accent-glow); }
.yf-btn-accent:hover { box-shadow: 0 10px 40px var(--yf-accent-glow); filter: brightness(1.03); }
.yf-btn-line { background: color-mix(in srgb, var(--yf-ink-2) 60%, transparent); border-color: var(--yf-line-strong); }
.yf-btn-line:hover { background: var(--yf-tint-hover); }
.yf-btn[aria-disabled="true"] { cursor: default; box-shadow: none; opacity: .75; }
.yf-btn[aria-disabled="true"]:active { transform: none; }

/* このブラウザに Y-FILTER. が入っているとき */
.yf-installed { display: inline-flex; align-items: center; gap: 12px; margin-top: 28px; padding: 10px 18px 10px 10px; border-radius: 16px; background: var(--yf-ink-2); border: 1px solid #bfe5cc; box-shadow: 0 8px 24px rgba(27, 127, 59, .12); }
.yf-installed-ico { width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: #e6f5ec; color: #1b7f3b; flex: none; }
.yf-installed-ico svg { width: 18px; height: 18px; }
.yf-installed strong { display: block; font-size: 14.5px; }
.yf-installed small { display: block; color: var(--yf-muted); font-size: 12.5px; font-variant-numeric: tabular-nums; }
.yf-update { display: flex; align-items: center; gap: 10px; margin-top: 12px; padding: 10px 14px; border-radius: 12px; background: var(--yf-accent-soft); border: 1px solid var(--yf-accent-border); color: var(--yf-accent-text); font-size: 13.5px; font-weight: 600; max-width: 520px; }
.yf-update svg { width: 18px; height: 18px; flex: none; }
.yf-update a { color: inherit; }
.yf-installed + .yf-cta, .yf-update + .yf-cta { margin-top: 22px; }

/* フィルターの様子 */
.yf-viz { position: relative; background: var(--yf-ink-2); border: 1px solid var(--yf-line-strong); border-radius: 22px; padding: 18px; box-shadow: var(--yf-shadow-lg); }
.yf-viz-head { display: flex; align-items: center; justify-content: space-between; padding: 4px 6px 14px; border-bottom: 1px solid var(--yf-line); margin-bottom: 10px; }
.yf-viz-title { font-family: var(--yf-display); font-size: 13px; color: var(--yf-muted); display: flex; align-items: center; gap: 8px; }
.yf-live { width: 8px; height: 8px; border-radius: 50%; background: var(--yf-accent); animation: yf-pulse 1.8s infinite; }
.yf-viz-count { font-family: var(--yf-display); font-size: 12px; color: var(--yf-faint); }
.yf-viz-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.yf-viz-list li { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 11px 12px; border-radius: 12px; background: var(--yf-tint); font-family: var(--yf-display); font-size: 13.5px; opacity: 0; animation: yf-slide 520ms ease forwards; }
.yf-viz-list li:nth-child(1) { animation-delay: 150ms; }
.yf-viz-list li:nth-child(2) { animation-delay: 350ms; }
.yf-viz-list li:nth-child(3) { animation-delay: 550ms; }
.yf-viz-list li:nth-child(4) { animation-delay: 750ms; }
.yf-viz-list li:nth-child(5) { animation-delay: 950ms; }
.yf-viz-list li:nth-child(6) { animation-delay: 1150ms; }
.yf-viz-url { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.yf-viz-list li.blocked .yf-viz-url { color: var(--yf-faint); text-decoration: line-through; text-decoration-color: var(--yf-danger); }
.yf-badge { flex: none; font-size: 11px; font-weight: 700; padding: 3px 10px; border-radius: 999px; }
.yf-badge.ok { background: var(--yf-accent-soft); color: var(--yf-accent-text); }
.yf-badge.ng { background: var(--yf-danger-soft); color: var(--yf-danger); }
.yf-viz-foot { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 12px; }
.yf-viz-stat { background: var(--yf-tint); border: 1px solid var(--yf-line); border-radius: 12px; padding: 10px 12px; }
.yf-viz-stat b { display: block; font-family: var(--yf-display); font-size: 20px; }
.yf-viz-stat span { font-size: 11px; color: var(--yf-muted); }

/* ---------- 開発中のお知らせ ---------- */
.yf-notice { display: flex; gap: 14px; align-items: flex-start; padding: 18px 22px; margin-bottom: 72px; border-radius: 18px; background: var(--yf-ink-2); border: 1px solid var(--yf-accent-border); box-shadow: 0 8px 30px var(--yf-accent-glow); }
.yf-notice svg { width: 22px; height: 22px; flex: none; margin-top: 2px; color: var(--yf-accent-text); }
.yf-notice strong { display: block; }
.yf-notice p { font-size: 14px; color: var(--yf-muted); }

/* ---------- 見出し ---------- */
.yf-label { font-family: var(--yf-display); font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--yf-muted); margin: 0 0 18px; }

/* ---------- Features ---------- */
.yf-features { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--yf-line); border-left: 1px solid var(--yf-line); margin-bottom: 88px; background: color-mix(in srgb, var(--yf-ink-2) 55%, transparent); }
.yf-feature { padding: 28px; border-right: 1px solid var(--yf-line); border-bottom: 1px solid var(--yf-line); }
.yf-feature svg { width: 26px; height: 26px; stroke: var(--yf-accent-text); fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.yf-feature h3 { font-size: 16px; margin: 16px 0 6px; }
.yf-feature p { font-size: 13.5px; color: var(--yf-muted); line-height: 1.7; }

/* ---------- 機能の紹介（共通） ---------- */
.yf-h2 { font-size: clamp(26px, 3.4vw, 40px); font-weight: 900; line-height: 1.3; letter-spacing: -.02em; }
.yf-h2 em { font-style: normal; color: var(--yf-accent-text); }
.yf-sub { color: var(--yf-muted); font-size: 15.5px; line-height: 1.85; max-width: 560px; margin-top: 16px; }
.yf-num { font-family: var(--yf-display); font-weight: 700; font-size: 56px; line-height: 1; margin-bottom: 14px; color: transparent; -webkit-text-stroke: 1.2px var(--yf-accent-text); }
.yf-checks { list-style: none; margin: 22px 0 0; padding: 0; display: flex; flex-direction: column; gap: 10px; font-size: 14.5px; font-weight: 500; }
.yf-checks li { position: relative; padding-left: 30px; line-height: 1.6; }
.yf-checks li::before {
  content: ""; position: absolute; left: 0; top: 2px; width: 19px; height: 19px; border-radius: 6px;
  background: var(--yf-accent) center / 12px no-repeat url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231a1204' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E");
}
.yf-window { border-radius: 16px; box-shadow: var(--yf-shadow-lg), 0 0 0 1px var(--yf-line-strong); background: var(--yf-ink-2); }
.yf-window img { display: block; width: 100%; }

/* 管理画面の全体 */
.yf-showcase { text-align: center; padding: 8px 0 88px; }
.yf-showcase .yf-sub { margin: 16px auto 0; }
.yf-showcase .yf-window { max-width: 1000px; margin: 40px auto 0; transform: perspective(1800px) rotateX(4deg); transform-origin: center top; }
.yf-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; max-width: 1000px; margin: 28px auto 0; }
.yf-stats > div { background: var(--yf-ink-2); border: 1px solid var(--yf-line-strong); border-radius: 16px; padding: 16px 18px; text-align: left; }
.yf-stats b { display: block; font-family: var(--yf-display); font-size: 30px; line-height: 1.1; }
.yf-stats b small { font-size: 16px; margin-left: 2px; }
.yf-stats span { font-size: 12.5px; color: var(--yf-muted); }

/* 左右に並べる紹介 */
.yf-split { display: grid; grid-template-columns: .85fr 1.15fr; gap: 56px; align-items: center; padding: 72px 0; border-top: 1px solid var(--yf-line); }
.yf-split--reverse { grid-template-columns: 1.15fr .85fr; }
.yf-split--reverse .yf-split-text { order: 2; }
.yf-split--narrow { grid-template-columns: 1fr 1fr; }

/* ブロック画面を 2 枚重ねる */
.yf-stack { position: relative; padding-bottom: 26%; }
.yf-stack > .yf-window:first-child { width: 86%; }
.yf-stack-back { position: absolute; right: 0; bottom: 0; width: 64%; transform: rotate(1.5deg); }

/* ポップアップ */
.yf-popup { display: flex; justify-content: center; position: relative; }
.yf-popup::before { content: ""; position: absolute; width: 70%; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, var(--yf-grid-glow), transparent 65%); top: 10%; }
.yf-popup img { position: relative; width: min(320px, 100%); border-radius: 18px; box-shadow: var(--yf-shadow-lg), 0 0 0 1px var(--yf-line-strong); }

/* ---------- SK Hub Systems ---------- */
.yf-systems { margin: 16px 0 0; padding: 44px; border-radius: 26px; background: #0f1216; color: #fff; position: relative; overflow: hidden; }
.yf-systems::before { content: ""; position: absolute; inset: 0; background: radial-gradient(620px 320px at 100% 0%, rgba(255, 200, 61, .22), transparent 70%), radial-gradient(420px 260px at 0% 100%, rgba(190, 100, 20, .3), transparent 70%); }
.yf-systems > * { position: relative; }
.yf-systems .yf-num { -webkit-text-stroke-color: var(--yf-accent); }
.yf-systems .yf-label { color: var(--yf-accent); margin-bottom: 10px; }
.yf-systems h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 900; line-height: 1.35; }
.yf-systems p { color: rgba(255, 255, 255, .72); font-size: 15px; margin-top: 12px; max-width: 700px; }
.yf-checks--dark { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 28px; color: rgba(255, 255, 255, .9); max-width: 860px; }
.yf-systems .yf-cta { margin-top: 30px; }
.yf-systems .yf-btn-line { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .25); }
.yf-systems .yf-btn-line:hover { background: rgba(255, 255, 255, .08); }

/* ---------- プライバシー ---------- */
.yf-privacy { padding: 96px 0 72px; text-align: center; }
.yf-privacy-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 36px; text-align: left; }
.yf-privacy-card { background: var(--yf-ink-2); border: 1px solid var(--yf-line-strong); border-radius: 20px; padding: 26px; }
.yf-privacy-card svg { width: 28px; height: 28px; stroke: var(--yf-accent-text); fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.yf-privacy-card h3 { font-size: 17px; margin: 14px 0 6px; }
.yf-privacy-card p { font-size: 14px; color: var(--yf-muted); line-height: 1.75; }

/* ---------- 最後 ---------- */
.yf-final { text-align: center; padding: 24px 0 48px; }
.yf-final img { width: 64px; height: 64px; margin: 0 auto; border-radius: 18px; box-shadow: 0 10px 30px rgba(200, 130, 20, .35); }
.yf-final h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 900; margin-top: 22px; }
.yf-final p { color: var(--yf-muted); margin-top: 10px; }
.yf-final .yf-cta { justify-content: center; margin-top: 26px; }

@keyframes yf-slide { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes yf-pulse { 0% { box-shadow: 0 0 0 0 rgba(255, 200, 61, .6); } 70% { box-shadow: 0 0 0 8px rgba(255, 200, 61, 0); } 100% { box-shadow: 0 0 0 0 rgba(255, 200, 61, 0); } }
@media (prefers-reduced-motion: reduce) {
  .yf-viz-list li { animation: none; opacity: 1; }
  .yf-live { animation: none; }
}

@media (max-width: 900px) {
  .yf-hero { grid-template-columns: 1fr; gap: 40px; padding: 36px 0 56px; }
  .yf-split, .yf-split--reverse, .yf-split--narrow { grid-template-columns: 1fr; gap: 32px; padding: 56px 0; }
  .yf-split--reverse .yf-split-text { order: 0; }
  .yf-stats { grid-template-columns: 1fr 1fr; }
  .yf-privacy-grid { grid-template-columns: 1fr; }
  .yf-checks--dark { grid-template-columns: 1fr; }
  .yf-features { grid-template-columns: 1fr 1fr; margin-bottom: 64px; }
  .yf-showcase .yf-window { transform: none; }
}
@media (max-width: 560px) {
  .yf .wrap { padding: 0 16px; }
  .yf-features { grid-template-columns: 1fr; }
  .yf-systems { padding: 28px 22px; }
  .yf-num { font-size: 44px; }
}
/* 見出しは言葉のまとまりで折り返す */
.yf .nb { display: inline-block; }

/* ダークモード（端末がダークでライトを選んでいない / ダークを選んだ）。値を変えるときは両方そろえる */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .yf-page {
    --yf-ink: #0e1116; --yf-ink-2: #161b22;
    --yf-line: rgba(255, 255, 255, .08); --yf-line-strong: rgba(255, 255, 255, .16);
    --yf-tint: rgba(255, 255, 255, .03); --yf-tint-hover: rgba(255, 255, 255, .06);
    --yf-text: #eef0f3; --yf-muted: #a3abb8; --yf-faint: #7c8594;
    --yf-accent-text: #ffc83d; --yf-accent-soft: rgba(255, 200, 61, .12); --yf-accent-border: rgba(255, 200, 61, .35);
    --yf-danger-soft: rgba(196, 50, 31, .18); --yf-grid-glow: rgba(255, 200, 61, .16);
    --yf-shadow-lg: 0 24px 60px rgba(0, 0, 0, .45);
  }
}
:root[data-theme="dark"] .yf-page {
  --yf-ink: #0e1116; --yf-ink-2: #161b22;
  --yf-line: rgba(255, 255, 255, .08); --yf-line-strong: rgba(255, 255, 255, .16);
  --yf-tint: rgba(255, 255, 255, .03); --yf-tint-hover: rgba(255, 255, 255, .06);
  --yf-text: #eef0f3; --yf-muted: #a3abb8; --yf-faint: #7c8594;
  --yf-accent-text: #ffc83d; --yf-accent-soft: rgba(255, 200, 61, .12); --yf-accent-border: rgba(255, 200, 61, .35);
  --yf-danger-soft: rgba(196, 50, 31, .18); --yf-grid-glow: rgba(255, 200, 61, .16);
  --yf-shadow-lg: 0 24px 60px rgba(0, 0, 0, .45);
}