/**
 * Navigation - 导航组件 v2
 * FAB 主按钮 + 页面通用组件
 */

/* ── FAB 主按钮 ── */
.fab {
  position: fixed;
  bottom: 100px;
  right: 36px;
  left: auto;
  transform: none;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
  color: white;
  font-size: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow:
    0 8px 24px rgba(139, 92, 246, 0.6),
    0 3px 8px rgba(0, 0, 0, 0.25),
    inset 0 2px 4px rgba(255, 255, 255, 0.35),
    inset 0 -3px 8px rgba(0, 0, 0, 0.15);
  border: none;
  cursor: pointer;
  z-index: var(--z-fab);
  transition: box-shadow 0.15s ease, background 0.15s ease;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.fab:hover {
  box-shadow:
    0 2px 8px rgba(139, 92, 246, 0.4),
    0 1px 3px rgba(0, 0, 0, 0.2),
    inset 0 2px 4px rgba(255, 255, 255, 0.15),
    inset 0 -1px 4px rgba(0, 0, 0, 0.1);
}

.fab:active {
  box-shadow:
    0 1px 4px rgba(139, 92, 246, 0.3),
    inset 0 3px 8px rgba(0, 0, 0, 0.15);
}

/* ── 页面指示器（底部小点）── */
.page-indicator {
  position: fixed;
  bottom: calc(var(--space-3) + env(safe-area-inset-bottom, 0px));
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-2);
  z-index: var(--z-fab);
  padding: var(--space-2) var(--space-3);
  background: var(--glass-bg, rgba(255,255,255,0.05));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-full);
  border: 1px solid var(--glass-border, rgba(255,255,255,0.08));
}

.indicator-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transition: background 0.15s, transform 0.15s;
}

.indicator-dot.active {
  background: var(--color-primary-light, var(--color-primary));
  transform: scale(1.3);
}

/* ── 页面头部（通用）── */
.page-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  margin: var(--space-4);
  border-radius: var(--radius-lg);
}

.page-header h2 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  flex: 1;
}

.back-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s;
}

.back-btn:active {
  background: var(--glass-bg-hover);
}

/* ── 页面内容区 ── */
.page-content {
  padding: 0 var(--space-4) calc(120px + env(safe-area-inset-bottom, 0px)) var(--space-4);
}

/* ── Toast 提示 ── */
.toast {
  position: fixed;
  top: calc(var(--space-6) + env(safe-area-inset-top, 0px));
  left: 50%;
  transform: translateX(-50%) translateY(-100px);
  padding: var(--space-3) var(--space-5);
  background: var(--color-text-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  z-index: var(--z-toast);
  opacity: 0;
  transition: transform 0.3s var(--ease-spring), opacity 0.3s;
  pointer-events: none;
  max-width: calc(100vw - var(--space-8));
  text-align: center;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

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

/* ── 空状态 ── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12) var(--space-6);
  text-align: center;
  color: var(--color-text-secondary);
}

.empty-state .icon {
  font-size: 48px;
  margin-bottom: var(--space-4);
  opacity: 0.4;
}

/* ── 登录页隐藏 bottom-nav + FAB ── */
#app:has(#login-page:not(.hidden)) #bottom-nav,
#app:has(#login-page:not(.hidden)) .fab {
  display: none !important;
}