:root {
  --primary: #1a1a1a;
  --primary-hover: #333333;
  --success: #10b981;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --bg: #f5f5f5;
  --card-bg: #ffffff;
  --text: #1a1a1a;
  --text-secondary: #6b7280;
  --border: #e5e5e5;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
  --radius: 6px;
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 15px;
}

.container {
  width: 95%;
  max-width: 800px;
  margin: 24px auto;
  background-color: var(--card-bg);
  padding: 28px;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
}

h1 {
  text-align: center;
  color: var(--text);
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 24px 0;
  letter-spacing: -0.025em;
}

h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  margin: 24px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  font-size: 0.9rem;
}

.server-select-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.server-select-wrapper select {
  flex: 1;
}

.connection-status {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background-color: var(--bg);
  border-radius: 20px;
  font-size: 0.8rem;
  white-space: nowrap;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.status-dot.status-connected {
  background-color: var(--success);
  box-shadow: 0 0 6px var(--success);
}

.status-dot.status-connecting {
  background-color: #f59e0b;
  animation: pulse 1s infinite;
}

.status-dot.status-disconnected {
  background-color: var(--danger);
}

.status-dot.status-reconnecting {
  background-color: #f59e0b;
  animation: pulse 0.5s infinite;
}

.status-text {
  color: var(--text-secondary);
  font-weight: 500;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.form-row {
  display: flex;
  gap: 12px;
}

.form-row .form-group {
  flex: 1;
}

input, select {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  font-size: 0.95rem;
  color: var(--text);
  background-color: #fff;
  transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

input::placeholder {
  color: var(--text-secondary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  background-color: #ffffff;
  color: var(--text);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
}

.btn-success {
  background-color: var(--success);
  color: #fff;
  border-color: var(--success);
}

.btn-success:hover:not(:disabled) {
  background-color: #059669;
  border-color: #059669;
}

.btn-danger {
  background-color: #ffffff;
  color: var(--danger);
  border-color: var(--danger);
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--danger);
  color: #fff;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.85rem;
}

.btn-block {
  width: 100%;
}

.button-row {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
}

.button-row .btn {
  flex: 1;
}

.list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.list-header h2 {
  margin: 0;
  padding: 0;
  border: none;
}

.search-box {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.85rem;
  width: 200px;
}

.search-box:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

ul {
  list-style: none;
  padding: 0;
  margin: 0;
  max-height: 400px;
  overflow-y: auto;
}

ul::-webkit-scrollbar {
  width: 6px;
}

ul::-webkit-scrollbar-track {
  background: var(--bg);
  border-radius: 3px;
}

ul::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 3px;
}

ul::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

li {
  padding: 14px 16px;
  background-color: #f8fafc;
  margin-bottom: 8px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: box-shadow 0.2s;
}

li:hover {
  box-shadow: var(--shadow);
}

li .item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 8px;
}

li .item-title {
  font-weight: 600;
  color: var(--text);
  font-size: 0.95rem;
  word-break: break-word;
  flex: 1;
}

li .item-format {
  display: inline-block;
  padding: 2px 8px;
  background-color: var(--primary);
  color: #fff;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  white-space: nowrap;
}

.item-format-select {
  display: inline-block;
  padding: 3px 8px;
  margin-right: 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.8rem;
  background-color: #fff;
  color: var(--text);
  cursor: pointer;
  width: auto;
}

.item-format-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.15);
}

li .item-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.status-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}

.status-waiting {
  background-color: #f1f5f9;
  color: var(--text-secondary);
}

.status-downloading {
  background-color: #dbeafe;
  color: #2563eb;
}

.status-complete {
  background-color: #d1fae5;
  color: #059669;
}

.status-error {
  background-color: #fee2e2;
  color: var(--danger);
}

.progress-bar {
  background-color: #e2e8f0;
  border-radius: 4px;
  height: 6px;
  margin-top: 10px;
  width: 100%;
  overflow: hidden;
}

.progress {
  height: 100%;
  background: var(--primary);
  width: 0%;
  transition: width 0.3s ease;
  border-radius: 4px;
}

.progress-bar.complete .progress {
  background: var(--success);
}

.progress-bar.error .progress {
  background: var(--danger);
}

.link-container {
  margin-top: 10px;
}

.link-container a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background-color: var(--primary);
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  transition: background-color 0.15s;
}

.link-container a:hover {
  background-color: var(--primary-hover);
}

.empty-list {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.copyright {
  text-align: center;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

@media (max-width: 640px) {
  .container {
    width: 100%;
    margin: 0;
    border-radius: 0;
    padding: 20px 16px;
  }

  h1 {
    font-size: 1.4rem;
  }

  .form-row {
    flex-direction: column;
    gap: 0;
  }

  .button-row {
    flex-direction: column;
  }

  li .item-header {
    flex-direction: column;
  }

  li .item-actions {
    width: 100%;
    justify-content: flex-end;
  }

  .search-box {
    width: 100%;
  }

  .list-header {
    flex-direction: column;
    gap: 8px;
    align-items: stretch;
  }

  .server-select-wrapper {
    flex-direction: column;
    align-items: stretch;
  }

  .connection-status {
    justify-content: center;
  }
}

#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  padding: 14px 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  font-weight: 500;
  color: #fff;
  max-width: 350px;
  animation: toast-in 0.3s ease-out;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast.toast-info {
  background-color: var(--primary);
}

.toast.toast-success {
  background-color: var(--success);
}

.toast.toast-error {
  background-color: var(--danger);
}

.toast.toast-out {
  animation: toast-out 0.3s ease-in forwards;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes toast-out {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(40px);
  }
}