/* layout.css - Apple HIG 布局系统 v5.0 */

/* ================================================================
   导航栏
   ================================================================ */
.navbar {
  background-color: var(--bg-primary);
  box-shadow: var(--nav-shadow);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 12px 0;
  padding-top: max(12px, env(safe-area-inset-top));
}

.nav-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Logo */
.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--text-primary);
  font-weight: var(--weight-semibold);
  font-size: 18px;
  font-family: inherit;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  min-height: var(--touch-min);
  transition: opacity 0.2s var(--ease-in-out);
}
.logo:hover { opacity: 0.8; }
.logo:focus, .logo:active { outline: none; }
.logo svg { width: 28px; height: 28px; }

/* 导航按钮组 */
.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}
.nav-links { display: flex; gap: var(--space-xs); }

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  border: none;
  background: transparent;
  color: #666666;
  font-size: var(--fs-body);
  font-family: inherit;
  cursor: pointer;
  transition: color 0.2s var(--ease-in-out);
  min-height: var(--touch-min);
  -webkit-tap-highlight-color: transparent;
  outline: none;
}
.nav-link:hover { color: #000000; }
.nav-link.active { color: var(--text-primary); }
.nav-link-icon { flex-shrink: 0; }
.nav-link:not(.active) .nav-link-icon { opacity: 0.5; }
.nav-link.active .nav-link-icon { opacity: 1; }

/* ================================================================
   主容器
   ================================================================ */
.app-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-container {
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
  padding: 76px var(--space-lg) 0;
  padding-top: max(76px, calc(env(safe-area-inset-top) + 64px));
  flex: 1;
  min-height: 0;
  overflow-x: hidden;
}

/* ================================================================
   页面切换动画
   ================================================================ */
.navbar.no-anim {
  animation: none !important;
  transition: none !important;
}
.page-content { display: none; opacity: 0; }
.page-content.active { display: block; opacity: 1; }

.page-leaving-today {
  animation: pageOutToday 350ms var(--ease-page) forwards;
  pointer-events: none;
}
.page-entering-search {
  animation: pageInSearch 350ms var(--ease-page) forwards;
}
.page-leaving-search {
  animation: pageOutSearch 350ms var(--ease-page) forwards;
  pointer-events: none;
}
.page-entering-today {
  animation: pageInToday 350ms var(--ease-page) forwards;
}

/* ================================================================
   响应式断点
   ================================================================ */

/* Desktop: >= 1025px */
@media (min-width: 1025px) {
  .nav-container { padding: 0 var(--space-xl); }
  .main-container { padding: 80px var(--space-xl) 0; }
}

/* Tablet: 768px - 1024px */
@media (min-width: 768px) and (max-width: 1024px) {
  .nav-container { padding: 0 var(--space-lg); }
  .main-container { padding: 76px var(--space-lg) 0; }
}

/* Phone: <= 767px */
@media (max-width: 767px) {
  .logo { font-size: 16px; }
  .logo span { display: none; }
  .logo svg { width: 24px; height: 24px; }
  .nav-container { padding: 0 var(--space-md); }
  .nav-links { gap: 0; }
  .nav-link { padding: var(--space-sm); font-size: var(--fs-meta); }
  .nav-link-icon { width: 14px; height: 14px; }
  .main-container { padding: 68px var(--space-md) 0; }
}

/* Device class fallbacks */
.device-phone .logo { font-size: 16px; }
.device-phone .logo span { display: none; }
.device-phone .logo svg { width: 24px; height: 24px; }
.device-phone .nav-container { padding: 0 var(--space-md); }
.device-phone .nav-links { gap: 0; }
.device-phone .nav-link { padding: var(--space-sm); font-size: var(--fs-meta); }
.device-phone .nav-link-icon { width: 14px; height: 14px; }
.device-phone .main-container { padding: 68px var(--space-md) 0; }