/* ========================================
   共通スタイル — ダークネイビー × サイバーブルー
   ======================================== */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy:     #0a0f1e;
  --navy2:    #0d1529;
  --navy3:    #111d3a;
  --cyan:     #00d4ff;
  --cyan2:    #00a8cc;
  --cyan3:    #006f88;
  --white:    #e8f0ff;
  --gray:     #8899bb;
  --gray2:    #5566880;
  --danger:   #ff4d6d;
  --success:  #00e5a0;
  --card:     rgba(255,255,255,.04);
  --border:   rgba(0,212,255,.18);
  --radius:   14px;
  --shadow:   0 8px 32px rgba(0,0,0,.4);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--navy);
  color: var(--white);
  line-height: 1.7;
  min-height: 100vh;
}

/* ── NAVBAR ── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .8rem 2rem;
  background: rgba(10,15,30,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: 'Bebas Neue', cursive;
  font-size: 1.5rem;
  letter-spacing: .1em;
  color: var(--cyan);
  text-decoration: none;
}

.nav-logo span { color: var(--white); }

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 2rem;
  border: none;
  border-radius: 8px;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s, opacity .2s;
  text-decoration: none;
  white-space: nowrap;
}
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none !important; }

.btn-primary {
  background: linear-gradient(135deg, var(--cyan2), var(--cyan));
  color: #000f1a;
  box-shadow: 0 4px 20px rgba(0,212,255,.35);
}
.btn-primary:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(0,212,255,.5); }

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--white);
}
.btn-outline:hover { border-color: var(--cyan); color: var(--cyan); }

.btn-pay {
  background: linear-gradient(135deg, #f5a623, #ff6b35);
  color: #fff;
  font-size: 1.1rem;
  padding: .9rem 2.4rem;
  box-shadow: 0 4px 20px rgba(245,166,35,.35);
}
.btn-pay:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(245,166,35,.5); }

.btn-download {
  background: linear-gradient(135deg, var(--success), #00b37a);
  color: #001a0f;
  font-size: 1.1rem;
  padding: .9rem 2.4rem;
}
.btn-download:hover { transform: translateY(-2px); }

/* ── CARDS ── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
}

/* ── FOOTER ── */
.footer {
  text-align: center;
  padding: 2.5rem 2rem;
  border-top: 1px solid var(--border);
  color: var(--gray);
  font-size: .82rem;
}
.footer a { color: var(--cyan); text-decoration: none; }

/* ── UTILS ── */
.accent { color: var(--cyan); }
.container { max-width: 900px; margin: 0 auto; padding: 0 1.5rem; }
.mt-1 { margin-top: .5rem; }
.mt-2 { margin-top: 1rem; }
.text-center { text-align: center; }
.text-gray { color: var(--gray); }

/* ── LOADING OVERLAY ── */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5,10,24,.92);
  backdrop-filter: blur(8px);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  display: none;
}
.loading-overlay.active { display: flex; }

.loading-spinner {
  width: 52px;
  height: 52px;
  border: 3px solid var(--border);
  border-top-color: var(--cyan);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-msg {
  font-size: 1rem;
  color: var(--gray);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: .05em;
}

.loading-elapsed {
  font-size: .75rem;
  color: var(--cyan3);
  font-family: 'JetBrains Mono', monospace;
  display: none;
}

.loading-steps {
  display: none;
  align-items: center;
  gap: .6rem;
  font-size: .75rem;
  font-family: 'JetBrains Mono', monospace;
}

.step-dot {
  color: var(--gray);
  padding: .25rem .6rem;
  border: 1px solid var(--border);
  border-radius: 20px;
  transition: color .3s, border-color .3s;
}

.step-dot.active {
  color: var(--cyan);
  border-color: var(--cyan);
}

.step-dot.done {
  color: var(--success);
  border-color: var(--success);
}

.step-arrow {
  color: var(--border);
  font-size: .7rem;
}

/* ── ERROR / SUCCESS TOAST ── */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: .9rem 1.8rem;
  border-radius: 10px;
  font-size: .9rem;
  font-weight: 700;
  z-index: 1000;
  transition: transform .35s cubic-bezier(.34,1.56,.64,1);
  max-width: 90vw;
  text-align: center;
}
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.error { background: rgba(255,77,109,.15); border: 1px solid rgba(255,77,109,.4); color: #ff8fa3; }
.toast.success { background: rgba(0,229,160,.1); border: 1px solid rgba(0,229,160,.3); color: var(--success); }

@media (max-width: 600px) {
  .navbar { padding: .7rem 1rem; }
  .container { padding: 0 1rem; }
}