:root {
  --bg-0: #05060d;
  --bg-1: #0b0f1f;
  --bg-2: #131933;
  --panel: #0f1428;
  --panel-hi: #1a2142;
  --ink: #f1f5ff;
  --ink-mute: #8694c2;
  --grid: rgba(120, 140, 220, 0.06);

  --neon-rpg:    #fbbf24;   /* gold */
  --neon-action: #ef4444;   /* red */
  --neon-puzzle: #22d3ee;   /* cyan */
  --neon-horror: #a855f7;   /* purple */
  --neon-pink:   #ec4899;

  --font-arcade: "Press Start 2P", monospace;
  --font-jp-display: "RocknRoll One", "M PLUS Rounded 1c", sans-serif;
  --font-body: "M PLUS Rounded 1c", -apple-system, BlinkMacSystemFont,
    "Hiragino Sans", "Yu Gothic", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(168, 85, 247, 0.12) 0%, transparent 40%),
    radial-gradient(ellipse at 80% 90%, rgba(34, 211, 238, 0.10) 0%, transparent 45%),
    linear-gradient(180deg, var(--bg-0), var(--bg-1) 40%, var(--bg-2));
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-body);
  letter-spacing: 0.02em;
  overflow-x: hidden;
}

/* 背景グリッド */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at 50% 50%, black 30%, transparent 80%);
  pointer-events: none;
  z-index: 0;
}

/* CRT 風スキャンライン */
.scanlines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  background:
    repeating-linear-gradient(
      to bottom,
      rgba(0, 0, 0, 0) 0,
      rgba(0, 0, 0, 0) 2px,
      rgba(0, 0, 0, 0.09) 2px,
      rgba(0, 0, 0, 0.09) 3px
    );
  mix-blend-mode: overlay;
}

.vignette {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background: radial-gradient(ellipse at 50% 50%, transparent 60%, rgba(0, 0, 0, 0.75) 100%);
}

.hub {
  position: relative;
  z-index: 3;
  max-width: 1040px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

/* ===== タイトル ===== */
.hub-header {
  text-align: center;
  margin-bottom: 56px;
  padding: 24px 0 32px;
}

.title-wrap {
  position: relative;
  display: inline-block;
}

h1 {
  font-family: var(--font-arcade);
  font-size: clamp(28px, 6.4vw, 64px);
  font-weight: 400;
  margin: 0;
  letter-spacing: 0.08em;
  color: var(--ink);
  text-shadow:
    0 0 2px #fff,
    0 0 10px #22d3ee,
    0 0 22px #22d3ee,
    0 0 44px rgba(34, 211, 238, 0.4),
    4px 4px 0 #ec4899,
    8px 8px 0 rgba(236, 72, 153, 0.2);
  animation: title-flicker 4s infinite;
}

@keyframes title-flicker {
  0%, 100% { opacity: 1; }
  42% { opacity: 1; }
  43% { opacity: 0.7; }
  44% { opacity: 1; }
  92% { opacity: 1; }
  93% { opacity: 0.8; }
  94% { opacity: 1; }
}

.tagline {
  font-family: var(--font-arcade);
  font-size: 10px;
  color: #22d3ee;
  letter-spacing: 0.3em;
  margin: 24px 0 8px;
  text-shadow: 0 0 8px rgba(34, 211, 238, 0.6);
}

.blinker {
  font-family: var(--font-arcade);
  font-size: 9px;
  color: var(--neon-pink);
  letter-spacing: 0.3em;
  animation: blink 1.1s steps(2, end) infinite;
  text-shadow: 0 0 6px rgba(236, 72, 153, 0.7);
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ===== カテゴリ ===== */
.category {
  margin-bottom: 44px;
}

.category-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.chip {
  display: inline-block;
  font-family: var(--font-arcade);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.2em;
  padding: 10px 16px;
  border-radius: 4px;
  background: var(--panel);
  color: var(--ink);
  position: relative;
}

.category-line {
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, currentColor 0%, transparent 100%);
  opacity: 0.6;
}

/* カテゴリごとのネオンカラー */
[data-cat="rpg"]    .chip { color: var(--neon-rpg);    box-shadow: 0 0 0 2px var(--neon-rpg),    0 0 18px rgba(251, 191, 36, 0.6); }
[data-cat="action"] .chip { color: var(--neon-action); box-shadow: 0 0 0 2px var(--neon-action), 0 0 18px rgba(239, 68, 68, 0.6); }
[data-cat="puzzle"] .chip { color: var(--neon-puzzle); box-shadow: 0 0 0 2px var(--neon-puzzle), 0 0 18px rgba(34, 211, 238, 0.6); }
[data-cat="horror"] .chip { color: var(--neon-horror); box-shadow: 0 0 0 2px var(--neon-horror), 0 0 18px rgba(168, 85, 247, 0.6); }

[data-cat="rpg"]    .category-line { color: var(--neon-rpg); }
[data-cat="action"] .category-line { color: var(--neon-action); }
[data-cat="puzzle"] .category-line { color: var(--neon-puzzle); }
[data-cat="horror"] .category-line { color: var(--neon-horror); }

/* ===== カード ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 18px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 140px;
  padding: 20px 22px 18px;
  background:
    linear-gradient(135deg, var(--panel-hi) 0%, var(--panel) 60%, #0a0e1f 100%);
  border: 2px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  text-decoration: none;
  color: var(--ink);
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

/* 左の LED ライン */
.card::before {
  content: "";
  position: absolute;
  left: 0; top: 10%;
  width: 4px;
  height: 80%;
  border-radius: 0 2px 2px 0;
  background: var(--cat-color, #7dd3fc);
  box-shadow: 0 0 12px var(--cat-color, #7dd3fc);
}

/* 右上の斜めアクセント */
.card::after {
  content: "";
  position: absolute;
  top: -30px; right: -30px;
  width: 90px; height: 90px;
  background: var(--cat-color, #7dd3fc);
  opacity: 0.08;
  transform: rotate(45deg);
  transition: opacity 0.2s;
}

[data-cat="rpg"]    .card { --cat-color: var(--neon-rpg); }
[data-cat="action"] .card { --cat-color: var(--neon-action); }
[data-cat="puzzle"] .card { --cat-color: var(--neon-puzzle); }
[data-cat="horror"] .card { --cat-color: var(--neon-horror); }

.card:hover {
  transform: translateY(-4px);
  border-color: var(--cat-color, #7dd3fc);
  box-shadow:
    0 0 0 1px var(--cat-color, #7dd3fc),
    0 0 24px rgba(255, 255, 255, 0.06),
    0 0 40px var(--cat-color, #7dd3fc);
}
.card:hover::after { opacity: 0.2; }
.card:active { transform: translateY(-1px); }

.card-num {
  font-family: var(--font-arcade);
  font-size: 10px;
  color: var(--cat-color, var(--ink-mute));
  letter-spacing: 0.2em;
  margin-bottom: 8px;
  opacity: 0.8;
}

.card-title {
  font-family: var(--font-jp-display);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: 0.03em;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: auto;
}

/* Latin only game titles use a chunkier look via ::first-letter? keep generic. */

.card-hint {
  font-family: var(--font-arcade);
  font-size: 10px;
  color: var(--cat-color, var(--ink-mute));
  letter-spacing: 0.25em;
  margin-top: 16px;
  text-shadow: 0 0 8px currentColor;
}

/* ===== フッター ===== */
.hub-footer {
  margin-top: 48px;
  text-align: center;
}
.hub-footer p {
  font-family: var(--font-arcade);
  font-size: 9px;
  color: var(--ink-mute);
  letter-spacing: 0.3em;
  margin: 0;
}

/* ===== モバイル ===== */
@media (max-width: 480px) {
  .hub { padding: 28px 14px 50px; }
  h1 { letter-spacing: 0.04em; }
  .card-grid { grid-template-columns: 1fr; }
  .card { min-height: 120px; }
  .card-title { font-size: 19px; }
}