/* style.css */

/* ---------- 基本トークン ---------- */
:root {
  --bg: #020617;
  --bg-gradient: radial-gradient(circle at top, #0f172a 0, #020617 45%, #020617 100%);
  --card-bg: rgba(15, 23, 42, 0.9);
  --card-border: rgba(148, 163, 184, 0.4);
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.16);
  --accent-strong: #0ea5e9;
  --text-main: #e5e7eb;
  --text-muted: #9ca3af;
  --shadow-soft: 0 24px 70px rgba(15, 23, 42, 0.75);
}

/* ---------- ベース ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.8;
  color: var(--text-main);
  background: var(--bg-gradient);
}

/* ---------- レイアウト ---------- */
.page {
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 16px;
}

.card {
  position: relative;
  width: 100%;
  max-width: 860px;
  padding: 28px 26px 30px;
  border-radius: 22px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(16px);
}

/* 上部のグラデーションライン */
.card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, #22d3ee, #6366f1, #ec4899);
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.65;
}

/* ---------- ヘッダー ---------- */
.header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 26px;
}

.header-left {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.app-name {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.app-dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.main-title {
  font-size: clamp(1.8rem, 2.4vw, 2.2rem);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.main-title span {
  background: linear-gradient(135deg, #22d3ee, #818cf8);
  -webkit-background-clip: text;
  color: transparent;
}

.updated-at {
  align-self: flex-end;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---------- セクション ---------- */
.policy-block {
  padding: 18px 0 6px;
  border-radius: 14px;
  background: radial-gradient(circle at top left, var(--accent-soft), transparent 55%);
}

.policy-block + .policy-block {
  margin-top: 12px;
}

.lang-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.lang-label::before {
  content: "";
  width: 44px;
  height: 1px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

h1 {
  margin: 0 0 4px;
  font-size: 1.2rem;
}

h2 {
  margin: 18px 0 6px;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
}

p {
  margin: 0;
}

.section-lead {
  margin-top: 2px;
  font-size: 0.95rem;
}

/* ---------- リスト ---------- */
ul {
  margin: 8px 0 0 1.2em;
  padding: 0;
}

li {
  position: relative;
  margin: 0 0 4px;
  padding-left: 4px;
}

li::marker {
  color: var(--accent-strong);
}

/* ---------- 区切り線 ---------- */
hr {
  border: none;
  border-top: 1px dashed rgba(148, 163, 184, 0.55);
  margin: 24px 0 14px;
}

/* ---------- リンク ---------- */
a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 189, 248, 0.45);
  padding-bottom: 1px;
}

a:hover,
a:focus-visible {
  border-bottom-style: solid;
}

/* ---------- レスポンシブ ---------- */
@media (max-width: 640px) {
  .page {
    padding: 20px 12px;
  }

  .card {
    padding: 22px 18px 24px;
    border-radius: 18px;
  }

  .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .updated-at {
    align-self: flex-start;
    margin-top: 4px;
  }
}

/* ---------- 印刷用 ---------- */
@media print {
  body {
    background: #ffffff;
  }
  .page {
    padding: 0;
  }
  .card {
    box-shadow: none;
    border-radius: 0;
    border: none;
    background: #ffffff;
  }
  .card::before {
    display: none;
  }
}