:root{--bg:#0f1724;--card:#0b1220;--accent:#60a5fa;--muted:#9aa7be;--danger:#fb7185}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,system-ui,Segoe UI,Roboto,Helvetica,Arial,'Noto Sans JP',sans-serif;background:linear-gradient(180deg,#071226 0%,#071d2b 100%);color:#e6eef8;display:flex;align-items:center;justify-content:center;height:100vh;padding:20px}
.card{width:100%;max-width:720px;background:linear-gradient(180deg,rgba(255,255,255,0.03),rgba(255,255,255,0.02));border-radius:12px;padding:20px;box-shadow:0 10px 30px rgba(2,6,23,0.6)}
h1{font-size:25px;margin:0 0 8px;color:var(--accent)}
.lead{color:var(--muted);margin-bottom:16px}
.grid{display:grid;grid-template-columns:1fr 220px;gap:16px}
.controls{display:flex;flex-direction:column;gap:12px}
.inputs{display:flex;gap:8px}
.inputs input{width:100%;padding:10px;border-radius:8px;border:1px solid rgba(255,255,255,0.06);background:transparent;color:inherit;font-size:16px}
.btn{width:100%;padding:10px 12px;border-radius:8px;border:0;background:var(--accent);color:#032;cursor:pointer;font-weight:600}
.btn.secondary{background:transparent;border:1px solid rgba(255,255,255,0.06);color:var(--accent)}
.btn.danger{background:var(--danger);color:#2b0610}
.clock{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:18px;border-radius:10px;background:rgba(255,255,255,0.02)}
.time{font-size:150px;font-weight:700;letter-spacing:2px}
.sub{color:var(--muted);margin-top:8px}
.status{margin-top:12px;color:var(--muted)}
.small{font-size:13px;color:var(--muted)}
.switch{display:flex;align-items:center;gap:8px}
.progress{height:8px;background:rgba(255,255,255,0.03);border-radius:999px;overflow:hidden;margin-top:12px}
.bar{height:100%;width:0;background:linear-gradient(90deg,var(--accent),#7dd3fc)}
footer{margin-top:12px;text-align:right;color:var(--muted);font-size:12px}
@media(max-width:720px){.grid{grid-template-columns:1fr;}.clock{order:-1}}


/* --- Fireworks --- */
#fireworks {
  position: fixed;
  inset: 0;
  z-index: 99;
  pointer-events: none;
  background: transparent;
}

/* --- Popup animation --- */
.popup {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.3);
  z-index: 100;
  backdrop-filter: blur(3px);
  animation: fadeIn 0.3s ease forwards;
}

.popup-inner {
  background: white;
  color: #0b1220;
  padding: 30px 50px;
  border-radius: 16px;
  font-size: 1.6rem;
  font-weight: 700;
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
  transform: scale(0.8);
  animation: popIn 0.4s ease forwards;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes popIn {
  from { transform: scale(0.8); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

/* 初期は透明で非表示 */
#fireworks,
#popup {
  opacity: 0;
  display: none;
  transition: opacity 0.4s ease;
}

/* --- ホームリンク --- */
.home-link {
  display: inline-block;
  margin-top: 20px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s, transform 0.3s;
}

.home-link:hover {
  color: #93c5fd;
  transform: translateY(-2px);
}

/* --- スマホ対応 --- */
@media (max-width: 480px) {
  .card {
    padding: 15px;
  }

  .time {
    font-size: 80px; /* 大きすぎるので縮小 */
  }

  .inputs {
    flex-direction: column;
    gap: 6px;
  }

  .inputs input {
    width: 100%;
    font-size: 14px;
    padding: 8px;
  }

  .controls > div {
    flex-direction: column;
    gap: 8px;
  }

  .btn {
    font-size: 14px;
    padding: 8px;
  }

  .popup-inner {
    padding: 20px 30px;
    font-size: 1.2rem;
  }

  .sub, .small {
    font-size: 12px;
  }

  .home-link {
    font-size: 12px;
  }
}