/* ============ StudyPOS 未来型テーマ ============ */
:root {
  --bg: #0b1020;
  --grid: rgba(91, 139, 255, 0.06);
}

* { -webkit-tap-highlight-color: transparent; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(59,108,255,0.18), transparent 60%),
    radial-gradient(900px 500px at 0% 100%, rgba(124,58,237,0.16), transparent 55%),
    var(--bg);
  background-attachment: fixed;
}

/* 背景グリッド */
.bg-grid::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: 44px 44px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(circle at 50% 30%, black, transparent 85%);
}

/* ガラスモーフィズム */
.glass {
  background: rgba(17, 24, 50, 0.55);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border: 1px solid rgba(148, 163, 255, 0.12);
}
.glass-strong {
  background: rgba(17, 24, 50, 0.8);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid rgba(148, 163, 255, 0.16);
}

/* ネオンボーダーカード */
.card {
  position: relative;
  border-radius: 20px;
  transition: transform .35s cubic-bezier(.2,.8,.2,1), box-shadow .35s, border-color .35s;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 60px -24px rgba(59,108,255,.55);
  border-color: rgba(91,139,255,.4);
}

/* グラデーションテキスト */
.text-gradient {
  background: linear-gradient(120deg, #7aa2ff, #b799ff 60%, #ff9ecb);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ボタン */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  border-radius: 12px; font-weight: 600; transition: all .2s;
  cursor: pointer; border: 1px solid transparent;
}
.btn:active { transform: scale(.97); }
.btn-primary {
  background: linear-gradient(120deg, #3b6cff, #6d4bff);
  color: white; box-shadow: 0 10px 30px -10px rgba(59,108,255,.7);
}
.btn-primary:hover { box-shadow: 0 14px 40px -10px rgba(59,108,255,.9); filter: brightness(1.08); }
.btn-ghost { background: rgba(148,163,255,.08); border-color: rgba(148,163,255,.18); color: #cdd6ff; }
.btn-ghost:hover { background: rgba(148,163,255,.16); }
.btn-danger { background: rgba(239,68,68,.15); border-color: rgba(239,68,68,.35); color: #fca5a5; }
.btn-danger:hover { background: rgba(239,68,68,.28); }

/* 入力欄 */
.input {
  width: 100%; background: rgba(11,16,32,.6);
  border: 1px solid rgba(148,163,255,.18); border-radius: 12px;
  padding: .8rem 1rem; color: #e8ecff; transition: all .2s;
}
.input:focus { outline: none; border-color: #5b8bff; box-shadow: 0 0 0 4px rgba(59,108,255,.15); }
.input::placeholder { color: #6b76a8; }

/* バッジ */
.badge { font-size: .7rem; font-weight: 700; padding: .22rem .6rem; border-radius: 999px; }

/* プログレスバー */
.progress-track { height: 8px; border-radius: 999px; background: rgba(148,163,255,.14); overflow: hidden; }
.progress-fill { height: 100%; border-radius: 999px; background: linear-gradient(90deg,#3b6cff,#7c3aed); transition: width .8s cubic-bezier(.2,.8,.2,1); }

/* トースト */
.toast {
  min-width: 260px; padding: .9rem 1.1rem; border-radius: 14px;
  animation: toastIn .35s cubic-bezier(.2,.8,.2,1);
  display: flex; align-items: center; gap: .7rem; font-weight: 500;
}
@keyframes toastIn { from { opacity:0; transform: translateX(30px);} to {opacity:1; transform:none;} }

/* モーダル */
.modal-backdrop { position: fixed; inset:0; background: rgba(5,8,20,.7); backdrop-filter: blur(6px); z-index: 90; animation: fade .2s; display:flex; align-items:center; justify-content:center; padding: 1rem; }
@keyframes fade { from{opacity:0} to{opacity:1} }
.modal-panel { animation: pop .3s cubic-bezier(.2,.8,.2,1); }
@keyframes pop { from{opacity:0; transform: scale(.94) translateY(10px)} to{opacity:1; transform:none} }

/* フェードイン（スクロール登場） */
.fade-up { opacity: 0; transform: translateY(18px); animation: fadeUp .6s forwards; }
@keyframes fadeUp { to { opacity:1; transform:none; } }

/* ライブドット */
.live-dot { width:9px; height:9px; border-radius:999px; background:#22c55e; box-shadow:0 0 0 0 rgba(34,197,94,.6); animation: pulse 1.6s infinite; }
@keyframes pulse { 0%{box-shadow:0 0 0 0 rgba(34,197,94,.5)} 70%{box-shadow:0 0 0 10px rgba(34,197,94,0)} 100%{box-shadow:0 0 0 0 rgba(34,197,94,0)} }

/* サイドナビ */
.nav-item { display:flex; align-items:center; gap:.85rem; padding:.75rem 1rem; border-radius:12px; color:#9aa6d6; transition:all .2s; font-weight:600; }
.nav-item:hover { background: rgba(148,163,255,.08); color:#e8ecff; }
.nav-item.active { background: linear-gradient(120deg, rgba(59,108,255,.25), rgba(124,58,237,.18)); color:#fff; box-shadow: inset 0 0 0 1px rgba(91,139,255,.3); }

/* スクロールバー */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(91,139,255,.25); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: rgba(91,139,255,.4); }

/* ローディングスピナー */
.spinner { width: 42px; height: 42px; border: 3px solid rgba(148,163,255,.2); border-top-color: #5b8bff; border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ロック講義のオーバーレイ */
.lock-shine { position:relative; overflow:hidden; }
.lock-shine::after { content:""; position:absolute; inset:0; background:linear-gradient(120deg, transparent, rgba(255,255,255,.06), transparent); transform:translateX(-100%); animation: shine 3s infinite; }
@keyframes shine { to { transform:translateX(100%);} }

/* リング（円形プログレス） */
.ring { transform: rotate(-90deg); }
.ring circle { fill:none; stroke-width:10; stroke-linecap:round; }