/* ============================================================
   rasp1 プレースホルダページ

   方針:
   - 外部フォント / 外部 CDN / 画像を一切読み込まない。
     Caddy 側の CSP を default-src 'self' のまま保つため、
     またオフラインでも同じ見た目になるため。
   - JavaScript ゼロ。
   - ダークを基調に prefers-color-scheme でライトにも対応。
   - prefers-reduced-motion を尊重する。
   ============================================================ */

:root {
  color-scheme: dark light;

  --bg:        #08090d;
  --bg-soft:   #0e1017;
  --fg:        #e9ecf4;
  --fg-muted:  #8a92a6;
  --fg-faint:  #5c6274;
  --line:      rgba(255, 255, 255, 0.09);
  --card-bg:   rgba(255, 255, 255, 0.035);
  --card-edge: rgba(255, 255, 255, 0.10);
  --accent:    #5eead4;
  --accent-2:  #818cf8;
  --glow-1:    rgba(94, 234, 212, 0.20);
  --glow-2:    rgba(129, 140, 248, 0.22);
  --grid-line: rgba(255, 255, 255, 0.045);
  --shadow:    0 24px 70px -20px rgba(0, 0, 0, 0.85);

  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
               "Helvetica Neue", "Hiragino Kaku Gothic ProN", "Hiragino Sans",
               "Noto Sans JP", Meiryo, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
               "Liberation Mono", monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg:        #f7f8fb;
    --bg-soft:   #ffffff;
    --fg:        #10131c;
    --fg-muted:  #5a6173;
    --fg-faint:  #8b91a1;
    --line:      rgba(16, 19, 28, 0.10);
    --card-bg:   rgba(255, 255, 255, 0.72);
    --card-edge: rgba(16, 19, 28, 0.08);
    --accent:    #0d9488;
    --accent-2:  #4f46e5;
    --glow-1:    rgba(13, 148, 136, 0.16);
    --glow-2:    rgba(79, 70, 229, 0.16);
    --grid-line: rgba(16, 19, 28, 0.05);
    --shadow:    0 24px 60px -24px rgba(16, 19, 28, 0.22);
  }
}

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

html, body { height: 100%; }

body {
  margin: 0;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  padding: 2rem 1.25rem;
  position: relative;
  overflow: hidden;

  background-color: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---------- 背景レイヤー ---------- */

/* ゆっくり漂う二色のグラデーション光 */
.aurora {
  position: fixed;
  inset: -30%;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(38rem 30rem at 22% 28%, var(--glow-1), transparent 62%),
    radial-gradient(34rem 28rem at 78% 68%, var(--glow-2), transparent 62%),
    radial-gradient(60rem 44rem at 50% 120%, var(--bg-soft), transparent 70%);
  filter: blur(18px);
  animation: drift 26s ease-in-out infinite alternate;
}

/* 細かいグリッド。中心から外へフェードさせて主張を抑える */
.grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 78% 62% at 50% 42%, #000 15%, transparent 78%);
          mask-image: radial-gradient(ellipse 78% 62% at 50% 42%, #000 15%, transparent 78%);
}

@keyframes drift {
  from { transform: translate3d(-2%, -1%, 0) scale(1);    }
  to   { transform: translate3d( 2%,  2%, 0) scale(1.08); }
}

/* ---------- カード ---------- */

.card {
  position: relative;
  width: min(34rem, 100%);
  padding: clamp(2rem, 6vw, 3.25rem);
  border: 1px solid var(--card-edge);
  border-radius: 24px;
  background: var(--card-bg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  text-align: center;
  animation: rise 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* 上辺に細いハイライト。ガラス感を出す一本線 */
.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  border-radius: 24px 24px 0 0;
  background: linear-gradient(90deg, transparent, var(--card-edge) 18%, var(--card-edge) 82%, transparent);
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px) scale(0.985); }
  to   { opacity: 1; transform: none; }
}

/* ---------- ステータス表示 ---------- */

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1.5rem;
  padding: 0.3rem 0.85rem 0.3rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.dot {
  position: relative;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}

/* 広がって消えるリング */
.dot::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--accent);
  animation: ping 2.4s cubic-bezier(0, 0, 0.2, 1) infinite;
}

@keyframes ping {
  0%        { transform: scale(1);   opacity: 0.7; }
  70%, 100% { transform: scale(3.2); opacity: 0;   }
}

/* ---------- 見出し ---------- */

.title {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: clamp(2.75rem, 11vw, 4.25rem);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1.05;

  /* グラデーション文字。非対応環境では下の color がそのまま出る */
  color: var(--fg);
  background: linear-gradient(135deg, var(--fg) 8%, var(--accent) 52%, var(--accent-2) 96%);
  -webkit-background-clip: text;
          background-clip: text;
}

@supports (-webkit-background-clip: text) or (background-clip: text) {
  .title { -webkit-text-fill-color: transparent; }
}

.lede {
  margin: 0 0 2rem;
  color: var(--fg-muted);
  font-size: 0.95rem;
  text-wrap: pretty;
}

/* ---------- メタ情報 ---------- */

.meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.5rem 1rem;
  margin: 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  list-style: none;

  color: var(--fg-faint);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}

/* 項目間の中黒。最初の項目には付けない */
.meta li { position: relative; }

.meta li + li::before {
  content: "";
  position: absolute;
  left: -0.5rem;
  top: 50%;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.55;
  transform: translateY(-50%);
}

/* ---------- フッター ---------- */

.foot {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--fg-faint);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  animation: rise 0.7s 0.12s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* CSS だけで描いた南京錠。画像を読み込まないため */
.lock {
  width: 9px;
  height: 8px;
  border: 1.5px solid currentColor;
  border-radius: 2px;
  position: relative;
  flex: none;
}

.lock::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 100%;
  width: 6px;
  height: 5px;
  margin-left: -3px;
  border: 1.5px solid currentColor;
  border-bottom: 0;
  border-radius: 3px 3px 0 0;
}

/* ---------- アクセシビリティ ---------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

@media (prefers-contrast: more) {
  :root { --card-bg: var(--bg-soft); }
  .grid, .aurora { display: none; }
}