/* ============================================
   UI Components
   ============================================ */
/* ---- Scroll to Top ---- */
#scrollToTopBtn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition-normal), visibility var(--transition-normal), background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), transform 0.1s ease;
  opacity: 0;
  visibility: hidden;
  z-index: 10;
  box-shadow: var(--shadow-md);
}

#scrollToTopBtn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--text-tertiary);
  box-shadow: var(--shadow-lg);
}
#scrollToTopBtn:active {
  transform: scale(0.92);
}

#scrollToTopBtn.show {
  opacity: 1;
  visibility: visible;
}

.arrow-up {
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 6px solid currentColor;
}

/* ---- Symbol Selector ---- */
.symbol-selector {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  vertical-align: middle;
  flex-wrap: wrap;
}

.symbol-selector select {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px 30px 8px 12px;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-mono);
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
  min-height: 36px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23848e9c' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}

.symbol-selector select:hover { border-color: var(--text-tertiary); }
.symbol-selector select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 2px var(--blue-border);
}

.symbol-selector select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: var(--spacing-2);
}

/* Market selector (sans-serif, bolder) */
.symbol-selector #marketSelect {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  padding: 8px 24px 8px 10px;
  min-width: 70px;
  color: var(--text-secondary);
  border-color: var(--border-color);
}
.symbol-selector #marketSelect:hover { color: var(--text-primary); }

/* Divider between market and symbol */
.symbol-selector #marketSelect + #symbolSelect {
  margin-left: 0;
}

/* ---- Refresh Button ---- */
.refresh-btn {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
  font-size: 22px;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  line-height: 1;
}

.refresh-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--text-tertiary);
}

.refresh-btn:active {
  transform: rotate(180deg);
  transition: transform 0.3s ease;
}

/* ---- Data Startpoint Picker ---- */
.data-startpoint {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.startpoint-label, .selector-label {
  font-size: 17px;
  color: var(--text-tertiary);
  font-weight: 700;
  white-space: nowrap;
}

.startpoint-picker {
  position: relative;
  display: inline-block;
}

.startpoint-trigger {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 15px;
  font-family: var(--font-mono);
  cursor: pointer;
  outline: none;
  min-width: 150px;
  text-align: left;
  transition: border-color var(--transition-fast);
}
.startpoint-trigger:hover { border-color: var(--text-tertiary); }
.startpoint-trigger:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.startpoint-panel {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 36px;
  z-index: 10000;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  min-width: 420px;
}
.startpoint-panel.open { display: block; }

/* 半透明遮罩 */
.startpoint-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.4);
  z-index: 9999;
}
.startpoint-overlay.open { display: block; }

.startpoint-panel-row {
  display: flex;
  gap: 14px;
  margin-bottom: 22px;
}

.startpoint-date {
  flex: 1;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 17px;
  font-family: var(--font-mono);
  outline: none;
}
.startpoint-date:focus { border-color: var(--blue); }

.startpoint-hour {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 17px;
  font-family: var(--font-mono);
  outline: none;
  width: 100px;
}
.startpoint-hour:focus { border-color: var(--blue); }

.startpoint-panel-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

.startpoint-cancel {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 28px;
  font-size: 16px;
  cursor: pointer;
}
.startpoint-cancel:hover { background: var(--bg-hover); }

.startpoint-ok {
  background: var(--blue);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 28px;
  font-size: 16px;
  cursor: pointer;
  transition: background var(--transition-fast);
}
.startpoint-ok:hover { background: var(--blue-hover); }

/* ---- Language Switch ---- */
.lang-switch { display: flex; align-items: center; }

.lang-btn {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 4px var(--spacing-3);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  font-family: var(--font-mono);
}

.lang-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.lang-btn:active {
  transform: scale(0.95);
}

/* ---- Info Panel ---- */
.info-panel {
  margin-top: 20px;
  padding: 15px;
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
}

.position { font-weight: bold; color: var(--blue); }

/* ---- Footer ---- */
footer {
  height: 50px;
  display: flex;
  justify-content: center;
  align-items: center;
  bottom: 0;
  width: 100%;
  background-color: var(--bg-primary);
}

footer a { color: var(--blue); }

/* ---- Toast ---- */
#toast-container {
  position: fixed;
  top: 50px;
  right: var(--spacing-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  pointer-events: none;
}

.toast {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-3) 18px;
  font-size: 14px;
  line-height: 1.5;
  min-width: 200px;
  max-width: 360px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateX(30px);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
  pointer-events: auto;
}

.toast.show { opacity: 1; transform: translateX(0); }
.toast.error {
  border-left: 3px solid var(--red);
  background: linear-gradient(90deg, rgba(246, 70, 93, 0.08) 0%, var(--bg-secondary) 20%);
}
.toast.warn {
  border-left: 3px solid var(--orange);
  background: linear-gradient(90deg, rgba(240, 185, 11, 0.08) 0%, var(--bg-secondary) 20%);
}
.toast.success {
  border-left: 3px solid var(--green);
  background: linear-gradient(90deg, rgba(14, 203, 129, 0.08) 0%, var(--bg-secondary) 20%);
}