:root {
  --bg: #0f1419;
  --card: #1a2332;
  --text: #e8eef7;
  --muted: #8b9cb3;
  --accent: #5b9fd4;
  --accent-2: #7ec8a4;
  --danger: #e86a6a;
  --border: #2a3a52;
  --meter-bg: #243044;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;
  background: radial-gradient(ellipse at top, #1a2744 0%, var(--bg) 55%);
  color: var(--text);
  min-height: 100vh;
}

.page {
  max-width: 640px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.header { margin-bottom: 1.5rem; }
.eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.5rem;
}
h1 { margin: 0 0 0.35rem; font-size: 1.6rem; }
.subtitle { margin: 0; color: var(--muted); font-size: 0.95rem; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.25rem 1.35rem;
  margin-bottom: 1rem;
}
.card h2 { margin: 0 0 1rem; font-size: 1.05rem; }
.hidden { display: none !important; }

.field { display: block; margin-bottom: 1rem; }
.field > span { display: block; margin-bottom: 0.4rem; font-size: 0.9rem; color: var(--muted); }
.field input[type="number"] {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}
fieldset.field { border: none; padding: 0; margin: 0 0 1rem; }
fieldset.field label { display: block; margin: 0.35rem 0; cursor: pointer; }

.hint { font-size: 0.85rem; color: var(--muted); margin: 0 0 0.75rem; line-height: 1.5; }
.small { font-size: 0.8rem; }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 1.75rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.dropzone:hover, .dropzone:focus, .dropzone.dragover {
  border-color: var(--accent);
  background: rgba(91, 159, 212, 0.08);
}
.dropzone p { margin: 0.25rem 0; }

.file-actions { display: flex; gap: 0.5rem; margin-top: 0.65rem; flex-wrap: wrap; }

.btn {
  border: none;
  border-radius: 8px;
  padding: 0.65rem 1rem;
  font-size: 0.95rem;
  cursor: pointer;
  font-weight: 600;
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn.primary { background: linear-gradient(135deg, var(--accent), #3d7ab5); color: #fff; width: 100%; margin-top: 0.5rem; }
.btn.secondary { background: var(--meter-bg); color: var(--text); border: 1px solid var(--border); }

.ack-card {
  margin: 1rem 0;
  padding: 1rem 1.1rem;
  border-radius: 12px;
  border: 1px solid rgba(232, 184, 109, 0.45);
  background: rgba(232, 184, 109, 0.08);
}
.ack-title {
  margin: 0 0 0.4rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: #e8b86d;
}
.ack-body {
  margin: 0 0 0.85rem;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--text);
}
.ack-body strong { color: #f0d09a; }
.ack {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  font-size: 0.92rem;
  line-height: 1.45;
  cursor: pointer;
  padding: 0.55rem 0.65rem;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border);
}
.ack input {
  margin-top: 0.2rem;
  flex-shrink: 0;
  width: 1.1rem;
  height: 1.1rem;
}
.ack-card.is-checked .ack {
  border-color: var(--accent-2);
  background: rgba(126, 200, 164, 0.12);
}

.status.done-box {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border-radius: 12px;
  border: 1px solid rgba(126, 200, 164, 0.45);
  background: rgba(126, 200, 164, 0.1);
  color: var(--text);
  line-height: 1.6;
  font-size: 0.95rem;
}

.file-list, .upload-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
  max-height: 220px;
  overflow-y: auto;
}
.file-list li, .upload-list li {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}
.file-list li span:last-child { color: var(--muted); white-space: nowrap; }

.status { font-size: 0.9rem; margin-top: 0.75rem; color: var(--accent-2); }
.status.error { color: var(--danger); }

/* アップロードメーター */
.meter-head {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}
.meter-track {
  height: 12px;
  background: var(--meter-bg);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 1rem;
}
.meter-bar {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.25s ease-out;
  position: relative;
  overflow: hidden;
}
.meter-bar::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.35) 50%,
    transparent 100%
  );
  animation: shimmer 1.4s infinite;
}
@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.upload-list .state { display: flex; align-items: center; gap: 0.4rem; }
.upload-list .spinner {
  width: 14px;
  height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.upload-list .done { color: var(--accent-2); }
.upload-list .fail { color: var(--danger); }

.meter-bar.done { animation: none; }
.meter-bar.done::after { display: none; }