/* ============================================================
   LOHI MUSIC LAB 公式サイト 共通スタイル
   世界観：マルチAIクリエイターの「ちいさな実験室」＝夜のラボ×ネオン×遊び心
   ============================================================ */
:root {
  --bg: #07070f;
  --bg2: #0e0d20;
  --ink: #eef0ff;
  --muted: #a9adcc;
  --cyan: #5ee6ff;
  --pink: #ff5edb;
  --lime: #c8ff5e;
  --violet: #8b7bff;
  --gold: #eccd84;
  --line: rgba(255,255,255,0.12);
  --font-pixel: "DotGothic16", monospace;              /* 実験室のピクセル文字 */
  --font-latin: "Space Grotesk", sans-serif;           /* ローマ字 */
  --font-body: "Zen Kaku Gothic New","Hiragino Sans","Yu Gothic","Noto Sans JP",system-ui,sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background:
    radial-gradient(900px 500px at 85% -5%, rgba(255,94,219,0.10), transparent 60%),
    radial-gradient(900px 600px at -10% 20%, rgba(94,230,255,0.10), transparent 60%),
    var(--bg);
  color: var(--ink);
  line-height: 1.95;
  overflow-x: hidden;
  min-height: 100vh;
}
/* 方眼紙（実験ノート）のうすい罫線 */
body::before {
  content: ""; position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at 50% 20%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 20%, #000 30%, transparent 75%);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--cyan); }

/* ====== 共通レイアウト ====== */
.wrap { position: relative; z-index: 1; max-width: 1040px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 32px); }
section { padding: clamp(44px, 7vw, 76px) 0; }
.eyebrow { font-family: var(--font-latin); font-size: 12px; letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--cyan); margin-bottom: 12px; }
h1, h2 { font-weight: 700; letter-spacing: 0.02em; line-height: 1.5; }
h2 { font-size: clamp(23px, 4.2vw, 32px); margin-bottom: 14px; }
h2 .px { font-family: var(--font-pixel); font-weight: 400; }
.lead { color: var(--muted); font-size: 15px; max-width: 660px; }
.center { text-align: center; }
.center .lead { margin-left: auto; margin-right: auto; }

/* ====== ナビ ====== */
.nav { position: sticky; top: 0; z-index: 50; display: flex; align-items: center; gap: 4px;
  padding: 10px clamp(12px, 3vw, 28px);
  background: rgba(7,7,15,0.84); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line); overflow-x: auto; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav .logo { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--ink);
  font-family: var(--font-pixel); font-size: 15px; letter-spacing: 0.06em; white-space: nowrap;
  margin-right: 10px; cursor: pointer; user-select: none; }
.nav .logo .fl { font-size: 20px; display: inline-block; transition: transform .3s cubic-bezier(.34,1.56,.64,1); }
.nav .logo:hover .fl { transform: rotate(-14deg) scale(1.15); }
.nav .sp { flex: 1; }
.nav a.item { text-decoration: none; color: var(--muted); font-size: 13px; padding: 7px 12px;
  border-radius: 999px; white-space: nowrap; }
.nav a.item:hover { color: var(--ink); background: rgba(255,255,255,0.06); }
.nav a.item.on { color: #0b0b14; background: linear-gradient(135deg, var(--cyan), var(--violet)); font-weight: 700; }
.nav a.yt { display: inline-flex; align-items: center; gap: 7px; text-decoration: none; white-space: nowrap;
  font-size: 12.5px; font-weight: 700; color: var(--ink);
  background: rgba(255,255,255,0.07); border: 1px solid var(--line); border-radius: 999px; padding: 5px 13px 5px 10px; margin-left: 6px; }
.nav a.yt:hover { background: rgba(255,255,255,0.12); }
.nav a.yt .brand-yt { width: 22px; height: 16px; }

/* 公式ロゴ（YouTube / TikTok）：色・形は変えずに使う（各社ブランドガイドライン準拠） */
.brand-yt { width: 44px; height: 31px; display: inline-block; vertical-align: middle; }
.brand-tt { width: 42px; height: 42px; display: inline-block; vertical-align: middle; }

/* 活動紹介ページ：活動イメージ（人物像）のシネマティック表示 */
.about-visual { position: relative; border-radius: 22px; overflow: hidden; margin: 0;
  border: 1px solid rgba(139,123,255,0.4);
  box-shadow: 0 22px 64px rgba(0,0,0,0.55), 0 0 54px rgba(94,230,255,0.12); }
.about-visual img { width: 100%; height: auto; display: block; }
.about-visual figcaption { position: absolute; left: 0; right: 0; bottom: 0;
  padding: 46px 24px 18px; font-size: clamp(13px, 2.4vw, 15px); color: var(--ink);
  background: linear-gradient(to top, rgba(7,7,15,0.92) 20%, rgba(7,7,15,0.4) 70%, transparent); }

/* アプリ開発ページ：各アプリの実アイコン画像 */
.exp .app-ico { width: 82px; height: 82px; border-radius: 20px; object-fit: cover; display: block;
  box-shadow: 0 8px 20px rgba(0,0,0,0.5); border: 1px solid rgba(255,255,255,0.1); }

/* ====== ヒーロー ====== */
.hero { padding: clamp(52px, 9vw, 96px) 0 clamp(36px, 6vw, 64px); text-align: center; }
.hero .badge { display: inline-flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--ink);
  border: 1px solid var(--line); background: rgba(255,255,255,0.05); border-radius: 999px; padding: 6px 16px;
  margin-bottom: 22px; }
.hero .badge b { color: var(--lime); font-weight: 700; }
.hero h1 { font-family: var(--font-latin); font-size: clamp(34px, 7.6vw, 66px); letter-spacing: 0.04em; line-height: 1.2;
  background: linear-gradient(100deg, var(--cyan) 10%, var(--violet) 45%, var(--pink) 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 26px rgba(139,123,255,0.35)); margin-bottom: 6px; }
.hero .subtitle { font-family: var(--font-latin); font-weight: 400; font-style: italic;
  font-size: clamp(14px, 3vw, 21px); letter-spacing: 0.14em; margin: 2px 0 6px;
  background: linear-gradient(100deg, var(--cyan), var(--pink)); -webkit-background-clip: text; background-clip: text;
  color: transparent; filter: drop-shadow(0 0 14px rgba(94,230,255,0.25)); }
.hero .kana { font-family: var(--font-pixel); font-size: clamp(13px, 2.6vw, 17px); color: var(--muted);
  letter-spacing: 0.5em; margin-bottom: 22px; }
.hero .catch { font-size: clamp(16px, 3vw, 21px); font-weight: 700; margin-bottom: 14px; }
.hero .catch i { font-style: normal; color: var(--cyan); }
.hero .lead { margin: 0 auto 30px; }

/* ボタン */
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.btn { display: inline-block; text-decoration: none; font-weight: 700; font-size: 14.5px;
  padding: 13px 26px; border-radius: 999px; transition: transform .16s ease, box-shadow .16s ease; }
.btn:hover { transform: translateY(-2px); }
.btn.main { background: linear-gradient(135deg, var(--cyan), var(--violet)); color: #0b0b14;
  box-shadow: 0 10px 30px rgba(94,230,255,0.25); }
.btn.ghost { color: var(--ink); border: 1px solid var(--line); background: rgba(255,255,255,0.04); }

/* ====== カード ====== */
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.card { position: relative; border: 1px solid var(--line); border-radius: 18px; padding: 26px 22px;
  background: linear-gradient(170deg, rgba(255,255,255,0.05), rgba(255,255,255,0.015));
  transition: transform .18s ease, border-color .18s ease; }
a.card { display: block; text-decoration: none; color: var(--ink); }
a.card:hover { transform: translateY(-4px); border-color: rgba(94,230,255,0.5); }
.card .ic { font-size: 34px; line-height: 1; margin-bottom: 12px; }
.card h3 { font-size: 17px; margin-bottom: 8px; }
.card p { font-size: 13.5px; color: var(--muted); }
.card .no { position: absolute; top: 16px; right: 18px; font-family: var(--font-latin); font-size: 11px;
  letter-spacing: 0.2em; color: var(--muted); opacity: 0.7; }
.card .more { display: inline-block; margin-top: 12px; font-size: 13px; color: var(--cyan); font-weight: 700; }

/* ====== 実験体（アプリ）カード ====== */
.exp { border: 1px solid var(--line); border-radius: 22px; overflow: hidden; margin-top: 26px;
  background: linear-gradient(170deg, rgba(255,255,255,0.05), rgba(255,255,255,0.012)); }
.exp .head { display: flex; align-items: center; gap: 12px; padding: 14px 20px; border-bottom: 1px dashed var(--line);
  font-family: var(--font-pixel); font-size: 13px; color: var(--muted); }
.exp .head .tag { font-family: var(--font-latin); font-size: 10.5px; letter-spacing: 0.22em; border: 1px solid var(--line);
  border-radius: 999px; padding: 3px 10px; }
.exp .head .st { margin-left: auto; font-size: 12px; }
.exp .st.live { color: var(--lime); }
.exp .st.soon { color: var(--muted); }
.exp .body { display: grid; grid-template-columns: 96px 1fr; gap: 18px; padding: 22px 20px; align-items: start; }
.exp .emoji { font-size: 58px; line-height: 1; text-align: center; padding-top: 4px;
  filter: drop-shadow(0 6px 18px rgba(0,0,0,0.5)); }
.exp h3 { font-size: 20px; margin-bottom: 6px; }
.exp h3 small { display: block; font-family: var(--font-latin); font-size: 11px; letter-spacing: 0.18em;
  color: var(--muted); margin-top: 2px; }
.exp p { font-size: 14px; color: var(--muted); }
.exp .chips { display: flex; flex-wrap: wrap; gap: 7px; margin: 12px 0 16px; }
.exp .chips span { font-size: 11.5px; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 3px 11px; }
.exp .btns { display: flex; flex-wrap: wrap; gap: 10px; }
.exp .btns .btn { font-size: 13px; padding: 10px 20px; }
/* アプリごとのアクセント */
.exp.gold { border-color: rgba(236,205,132,0.4); }
.exp.gold .btn.main { background: linear-gradient(135deg, #f3dfae, var(--gold)); box-shadow: 0 8px 26px rgba(236,205,132,0.22); }
.exp.neon { border-color: rgba(94,230,255,0.4); }
.exp.pop  { border-color: rgba(200,255,94,0.4); }
.exp.pop .btn.main { background: linear-gradient(135deg, var(--lime), var(--cyan)); }
.exp.locked { opacity: 0.75; }
.exp.locked .emoji { filter: grayscale(0.6); }

/* ====== 帯・小物 ====== */
.band { border: 1px solid rgba(94,230,255,0.35); border-radius: 20px;
  background: linear-gradient(160deg, rgba(94,230,255,0.09), rgba(139,123,255,0.05));
  padding: clamp(22px, 4.6vw, 38px); }
.band h2 { margin-bottom: 8px; }
.band p { color: var(--muted); font-size: 14px; }
.kv { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 20px; }
.kv .k { border: 1px solid var(--line); border-radius: 14px; padding: 14px; text-align: center; }
.kv .k b { display: block; font-size: 14.5px; margin-bottom: 3px; }
.kv .k span { font-size: 12px; color: var(--muted); }
.steps { counter-reset: st; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 24px; }
.steps .s { border: 1px solid var(--line); border-radius: 16px; padding: 20px 18px; position: relative; }
.steps .s::before { counter-increment: st; content: "0" counter(st); font-family: var(--font-latin);
  font-size: 26px; color: var(--violet); display: block; margin-bottom: 8px; }
.steps .s b { display: block; font-size: 15px; margin-bottom: 6px; }
.steps .s p { font-size: 13px; color: var(--muted); }
.note { font-size: 12.5px; color: var(--muted); }

/* ふわっと表示 */
.rv { opacity: 0; transform: translateY(20px); transition: opacity .7s ease, transform .7s ease; }
.rv.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .rv { opacity: 1; transform: none; transition: none; } }

/* ====== フッター ====== */
footer { position: relative; z-index: 1; border-top: 1px solid var(--line); margin-top: 30px;
  padding: 34px 0 44px; text-align: center; }
footer .links { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: center; font-size: 13px; margin-bottom: 14px; }
footer .links a { color: var(--muted); text-decoration: none; }
footer .links a:hover { color: var(--cyan); }
footer .mail { font-size: 13px; color: var(--muted); margin-bottom: 8px; }
footer .cp { font-family: var(--font-latin); font-size: 11.5px; letter-spacing: 0.18em; color: var(--muted); }
footer .egg-hint { font-family: var(--font-pixel); font-size: 11.5px; color: var(--muted); opacity: 0.75; margin-top: 16px; }
footer .egg-hint b { color: var(--lime); }

/* ====== 🥚 イースターエッグ演出 ====== */
/* ネオンパーティー（コナミコマンド） */
body.party { animation: hueSpin 1.6s linear infinite; }
@keyframes hueSpin { to { filter: hue-rotate(360deg); } }
/* 降りもの（音符・泡・ビーカー） */
#fxRain { position: fixed; inset: 0; z-index: 90; pointer-events: none; overflow: hidden; }
#fxRain i { position: absolute; top: -8vh; font-style: normal; animation: fall linear forwards; }
@keyframes fall { to { transform: translateY(115vh) rotate(240deg); opacity: 0.9; } }
/* トースト（発見メッセージ） */
#labToast { position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%) translateY(20px);
  z-index: 99; background: rgba(10,10,22,0.95); border: 1px solid var(--lime); color: var(--ink);
  font-family: var(--font-pixel); font-size: 13.5px; border-radius: 14px; padding: 12px 22px;
  opacity: 0; transition: opacity .3s ease, transform .3s ease; pointer-events: none;
  box-shadow: 0 0 30px rgba(200,255,94,0.25); max-width: 92vw; text-align: center; }
#labToast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
@media (prefers-reduced-motion: reduce) {
  body.party { animation: none; }
  #fxRain { display: none; }
}

/* ====== スマホ幅 ====== */
@media (max-width: 760px) {
  .grid3, .grid2, .steps, .kv { grid-template-columns: 1fr; }
  .kv .k { display: flex; align-items: baseline; gap: 10px; text-align: left; }
  .kv .k b { margin-bottom: 0; white-space: nowrap; }
  .exp .body { grid-template-columns: 1fr; }
  .exp .emoji { padding-top: 0; }
}