:root {
  --bg: #ffffff;
  --bg-elevated: #ffffff;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --border: rgba(0, 0, 0, 0.12);
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --danger: #ff3b30;
  --danger-hover: #ff5147;
  --success: #34c759;
  --warning: #ff9500;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  --radius: 12px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #000000;
    --bg-elevated: #1c1c1e;
    --text: #f5f5f7;
    --text-secondary: #98989d;
    --border: rgba(255, 255, 255, 0.12);
    --accent: #2997ff;
    --accent-hover: #4da8ff;
    --danger: #ff453a;
    --danger-hover: #ff6961;
    --success: #32d74b;
    --warning: #ff9f0a;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
  }
}

:root[data-theme="dark"] {
  --bg: #000000;
  --bg-elevated: #1c1c1e;
  --text: #f5f5f7;
  --text-secondary: #98989d;
  --border: rgba(255, 255, 255, 0.12);
  --accent: #2997ff;
  --accent-hover: #4da8ff;
  --danger: #ff453a;
  --danger-hover: #ff6961;
  --success: #32d74b;
  --warning: #ff9f0a;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

.app {
  max-width: 760px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand .logo {
  font-size: 28px;
}

.brand h1 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-secondary);
  display: inline-block;
  transition: background 0.3s;
}

.status-dot.online {
  background: var(--success);
}

.status-dot.reconnecting {
  background: var(--warning);
}

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

.icon-btn {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  padding: 6px;
  border-radius: 8px;
  color: var(--text);
  transition: background 0.2s;
}

.icon-btn:hover {
  background: var(--border);
}

.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 16px;
}

.device-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.device-name {
  flex: 0 1 240px;
  font-size: 14px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  outline: none;
  transition: border-color 0.2s;
}

.device-name:focus {
  border-color: var(--accent);
}

.hint {
  font-size: 12px;
  color: var(--text-secondary);
}

.compose-area textarea {
  width: 100%;
  font-family: inherit;
  font-size: 15px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  resize: vertical;
  outline: none;
  transition: border-color 0.2s;
  min-height: 60px;
}

.compose-area textarea:focus {
  border-color: var(--accent);
}

.compose-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.compose-actions .hint {
  flex: 1 1 100%;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn {
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 18px;
  border-radius: 980px;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

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

.btn.secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.btn.secondary:hover:not(:disabled) {
  background: rgba(0, 113, 227, 0.08);
}

.btn.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn.ghost:hover {
  background: var(--border);
}

.btn.danger-ghost {
  background: transparent;
  color: var(--danger);
  border: 1px solid transparent;
  font-size: 13px;
}

.btn.danger-ghost:hover {
  background: rgba(255, 59, 48, 0.1);
}

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

.btn.danger:hover {
  background: var(--danger-hover);
}

.paste-fallback {
  margin-top: 12px;
  padding: 12px;
  border: 1px dashed var(--border);
  border-radius: 10px;
}

.paste-fallback p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.paste-fallback textarea {
  width: 100%;
  font-family: inherit;
  font-size: 14px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  outline: none;
  resize: vertical;
}

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

.history-header h2 {
  font-size: 17px;
  font-weight: 600;
}

.empty {
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
  padding: 24px 0;
}

.clip-list {
  list-style: none;
}

.clip-item {
  border-top: 1px solid var(--border);
  padding: 12px 0;
}

.clip-item:first-child {
  border-top: none;
}

.clip-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.clip-device {
  font-weight: 500;
}

.clip-actions {
  display: flex;
  gap: 8px;
}

.clip-actions button {
  background: none;
  border: none;
  font-size: 12px;
  color: var(--accent);
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 4px;
}

.clip-actions button.delete {
  color: var(--danger);
}

.clip-content {
  font-size: 14px;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 160px;
  overflow-y: auto;
  cursor: pointer;
  user-select: text;
  -webkit-user-select: text;
}

.clip-content:hover {
  color: var(--accent);
}

.clip-item.just-added {
  animation: fade-in 0.4s ease;
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.load-more-wrap {
  text-align: center;
  padding: 12px 0 0;
}

.footer {
  text-align: center;
  font-size: 12px;
  color: var(--text-secondary);
  padding-top: 8px;
}

.confirm-dialog {
  border: none;
  border-radius: 16px;
  padding: 0;
  background: transparent;
  max-width: 420px;
  width: calc(100% - 40px);
  margin: auto;
  position: fixed;
  inset: 0;
  height: fit-content;
}

.confirm-dialog:not([open]) {
  display: none;
}

.confirm-dialog::backdrop {
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
}

.confirm-box {
  background: var(--bg-elevated);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.confirm-box h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.confirm-box p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.confirm-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.key-hint {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.key-row {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}

.key-input {
  flex: 1;
  min-width: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  outline: none;
}

.key-input:focus {
  border-color: var(--accent);
}

.hidden {
  display: none !important;
}