body {
  padding: 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: rgba(26, 26, 29, 0.85);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  flex: 1 1 auto;
}

.title {
  font-size: 14px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid rgba(251, 251, 252, 0.14);
  background: rgba(251, 251, 252, 0.06);
  color: var(--ink);
  text-decoration: none;
  font-size: 13px;
  transition: background 0.16s ease, border-color 0.16s ease, transform 0.16s ease;
  user-select: none;
}

.action-btn:hover {
  background: rgba(251, 251, 252, 0.11);
  border-color: rgba(251, 251, 252, 0.24);
  transform: translateY(-1px);
}

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

.panel {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(42, 42, 46, 0.92);
  box-shadow: var(--shadow);
  padding: 18px;
}

.upload-disabled-notice {
  min-height: 240px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(26, 26, 29, 0.8);
  padding: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--ink);
  font-size: 1.1rem;
  line-height: 1.5;
}

.upload-disabled-notice[hidden] {
  display: none;
}

.drop {
  border-radius: 14px;
  border: 1px dashed rgba(255, 255, 255, 0.18);
  background: rgba(26, 26, 29, 0.8);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
  text-align: center;
  color: var(--muted);
}

.drop strong {
  color: var(--ink);
  font-size: 16px;
  letter-spacing: 0.02em;
}

@media (min-width: 601px) {
  .drop {
    min-height: 240px;
    justify-content: center;
  }
}

.input-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.upload-submit-row {
  display: flex;
  justify-content: center;
  margin-top: 14px;
  min-height: 44px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
}

.upload-submit-row.is-active {
  opacity: 1;
}

.upload-status {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 14px;
  border-radius: 12px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
}

.upload-status-spinner {
  width: 16px;
  height: 16px;
  border-radius: 999px;
  border: 2px solid rgba(251, 251, 252, 0.18);
  border-top-color: rgba(251, 251, 252, 0.9);
  animation: upload-spin 0.8s linear infinite;
}

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

.file-picker {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  flex-wrap: wrap;
}

.file-picker-control {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.file-input-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  z-index: 2;
  border: 0;
  background: transparent;
  -webkit-appearance: none;
  appearance: none;
}

.file-picker-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border-radius: 12px;
  border: 1px solid rgba(251, 251, 252, 0.14);
  background: rgba(251, 251, 252, 0.06);
  color: var(--ink);
  text-decoration: none;
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.16s ease, border-color 0.16s ease, transform 0.16s ease;
}

.file-picker-btn:hover {
  background: rgba(251, 251, 252, 0.11);
  border-color: rgba(251, 251, 252, 0.24);
  transform: translateY(-1px);
}

.file-count {
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.2;
  opacity: 0.85;
}

.btn {
  padding: 10px 14px;
  font-size: 0.9rem;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.list {
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
}

.actions {
  margin-top: 10px;
  display: flex;
  justify-content: center;
}

.ok {
  color: #2c7a3f;
}

.err {
  color: #b94a4a;
}

@media (max-width: 600px) {
  :root {
    --mobile-btn-w: min(82vw, 320px);
    --mobile-btn-h: 50px;
    --mobile-btn-fs: 1rem;
  }

  .upload-submit-row {
    margin-top: 44px;
  }

  .file-picker {
    width: 100%;
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }

  .file-picker-control {
    width: var(--mobile-btn-w) !important;
    max-width: 100%;
    margin: 0 auto;
  }

  .file-picker-btn {
    width: var(--mobile-btn-w) !important;
    max-width: 100%;
    min-width: 0 !important;
    min-height: var(--mobile-btn-h) !important;
    padding: 10px 16px !important;
    font-size: var(--mobile-btn-fs) !important;
    font-weight: 600 !important;
    border-radius: 14px;
    box-sizing: border-box;
  }

  .file-count {
    font-size: 0.68rem;
    text-align: center;
  }

  .upload-status {
    width: var(--mobile-btn-w) !important;
    max-width: 100%;
    min-width: 0 !important;
    min-height: var(--mobile-btn-h) !important;
    padding: 10px 16px !important;
    font-size: var(--mobile-btn-fs) !important;
    font-weight: 600 !important;
    box-sizing: border-box;
  }
}