*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #020617;
  color: #e5e7eb;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  padding: 1rem 1.25rem;
  background: #020617;
  border-bottom: 1px solid #1f2937;
}

.app-title h1 {
  margin: 0;
  font-size: 1.25rem;
}

.app-title .subtitle {
  margin: 0.25rem 0 0;
  font-size: 0.85rem;
  color: #9ca3af;
}

.status-bar {
  margin-top: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.85rem;
  align-items: center;
}

.status-dot {
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
}

.status-dot.online {
  background: #065f46;
  color: #d1fae5;
}

.status-dot.offline {
  background: #7f1d1d;
  color: #fee2e2;
}

.status-dot.changing {
  background: #78350f;
  color: #ffedd5;
}

.connection-info {
  color: #9ca3af;
}

.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 0.75rem 1.25rem 1rem;
  gap: 0.75rem;
}

.control-panel {
  background: #020617;
  border-radius: 0.75rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid #1f2937;
}

.control-panel label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.url-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

#target-url {
  flex: 1;
  padding: 0.4rem 0.5rem;
  border-radius: 0.5rem;
  border: 1px solid #4b5563;
  background: #020617;
  color: #e5e7eb;
  font-size: 0.9rem;
}

#target-url:focus {
  outline: none;
  border-color: #3b82f6;
}

#load-btn {
  padding: 0.4rem 0.9rem;
  border-radius: 0.5rem;
  border: none;
  background: #3b82f6;
  color: #e5e7eb;
  font-weight: 500;
  cursor: pointer;
  font-size: 0.9rem;
}

#load-btn:hover {
  background: #2563eb;
}

.hint {
  font-size: 0.75rem;
  color: #9ca3af;
  line-height: 1.4;
}

.frame-wrapper {
  position: relative;
  flex: 1;
  min-height: 0;
  border-radius: 0.75rem;
  overflow: hidden;
  border: 1px solid #1f2937;
}

iframe#external-frame {
  width: 100%;
  height: 100%;
  min-height: 60vh;
  border: none;
  background: #020617;
}

.overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.78);
  display: flex;
  align-items: center;
  justify-content: center;
}

.overlay.hidden {
  display: none;
}

.overlay-content {
  padding: 0.75rem 1rem;
  border-radius: 0.75rem;
  border: 1px solid #4b5563;
  background: rgba(15, 23, 42, 0.9);
  font-size: 0.85rem;
  text-align: center;
  color: #e5e7eb;
}

.app-footer {
  padding: 0.5rem 1.25rem 0.75rem;
  font-size: 0.75rem;
  color: #6b7280;
  border-top: 1px solid #1f2937;
}
.status-panel {
  margin-top: 0.75rem;
  padding: 0.75rem;
  border: 1px solid #1f2937;
  border-radius: 0.75rem;
  background: #0f172a;
  color: #e5e7eb;
  font-size: 0.85rem;
  line-height: 1.4;
}

.manual-btn {
  margin-top: 0.5rem;
  padding: 0.4rem 0.7rem;
  background: #3b82f6;
  border-radius: 0.5rem;
  border: none;
  color: white;
  cursor: pointer;
}
.manual-btn:hover {
  background: #2563eb;
}

.log-box {
  margin-top: 0.5rem;
  font-size: 0.8rem;
}

#log-output {
  max-height: 200px;
  overflow-y: auto;
  padding: 6px;
  background: rgba(255,255,255,0.05);
  border-radius: 0.5rem;
  white-space: pre-wrap;
}
.bottom-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 55px;
  background: #1f2937;
  display: flex;
  justify-content: space-around;
  align-items: center;
  color: white;
  z-index: 999;
}

.bottom-bar button {
  color: white;
  background: transparent;
  border: none;
  font-size: 14px;
}

.iframe-container {
  padding-bottom: 60px; /* 騰空給 bottom bar */
}

.bookmark-bar, .history-bar {
  margin-top: 8px;
}

.overlay {
  position: fixed;
  inset: 0;
  backdrop-filter: blur(4px);
  background: rgba(0,0,0,0.35);
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 20px;
  z-index: 1000;
}