/* ============================================
   天天三国 - 布局系统
   Mobile-first · 底部导航 · 页面过渡
   ============================================ */

/* ============================================
   主内容区
   ============================================ */
#app {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  padding: 3.5rem var(--spacing-md) 4.5rem;
  position: relative;
}

/* 页面过渡 */
.page-transition {
  animation: pageEnter 0.35s ease-out;
}

@keyframes pageEnter {
  0% {
    opacity: 0;
    transform: translateY(12px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   顶部状态栏
   ============================================ */
.header-bar {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  z-index: 100;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-md);
  background: linear-gradient(
    180deg,
    rgba(30, 18, 18, 0.98) 0%,
    rgba(26, 26, 26, 0.95) 100%
  );
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* 底部装饰线 */
.header-bar::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--color-gold-dark) 50%,
    transparent
  );
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.player-level {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-gold-light);
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 0.125rem 0.5rem;
  border-radius: 0.625rem;
  border: 1px solid var(--color-gold-dark);
  min-width: 2.625rem;
  text-align: center;
}

.player-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  max-width: 5rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.header-right .currency {
  display: flex;
  align-items: center;
  gap: 0.1875rem;
  font-size: 0.75rem;
}

.header-right .currency-icon {
  font-size: 0.875rem;
}

.header-right .currency-amount {
  color: var(--color-text);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* ============================================
   底部导航栏
   ============================================ */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  z-index: 100;
  height: 4rem;
  display: flex;
  align-items: stretch;
  background: linear-gradient(
    0deg,
    rgba(20, 12, 12, 0.99) 0%,
    rgba(30, 18, 18, 0.97) 100%
  );
  border-top: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding-bottom: env(safe-area-inset-bottom, 0);
}

/* 顶部装饰线 */
.bottom-nav::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--color-gold-dark) 50%,
    transparent
  );
}

.nav-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.125rem;
  text-decoration: none;
  color: var(--color-text-dim);
  transition: color var(--transition-base), transform var(--transition-fast);
  position: relative;
  -webkit-tap-highlight-color: transparent;
}

.nav-tab:hover {
  color: var(--color-text);
}

.nav-tab:active {
  transform: scale(0.92);
}

.nav-icon {
  font-size: 1.375rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.125rem;
  border-radius: 0.75rem;
  background: radial-gradient(circle, rgba(250, 215, 120, 0.2) 0%, rgba(218, 165, 32, 0.08) 55%, rgba(218, 165, 32, 0) 78%);
  box-shadow: inset 0 0 0 1px rgba(246, 222, 154, 0.12), 0 0 10px rgba(218, 165, 32, 0.14);
  transition: transform var(--transition-base);
}

.nav-icon-img {
  width: 1.95rem;
  height: 1.95rem;
  display: block;
  object-fit: contain;
  filter: drop-shadow(0 0 1px rgba(255, 236, 190, 0.95)) drop-shadow(0 0 7px rgba(218, 165, 32, 0.45)) drop-shadow(0 2px 5px rgba(0, 0, 0, 0.48));
}

.nav-label {
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.5px;
}

/* 激活状态 */
.nav-tab.active {
  color: var(--color-gold);
}

.nav-tab.active .nav-icon {
  transform: scale(1.15);
  box-shadow: inset 0 0 0 1px rgba(250, 226, 162, 0.22), 0 0 14px rgba(218, 165, 32, 0.24);
}

.nav-tab.active .nav-label {
  color: var(--color-gold);
  font-weight: 700;
}

/* 激活指示器 */
.nav-tab.active::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1.5rem;
  height: 0.125rem;
  background: var(--color-gold);
  border-radius: 0 0 0.125rem 0.125rem;
  box-shadow: 0 0 8px rgba(218, 165, 32, 0.6);
}

/* 通知徽章 */
.nav-tab .nav-badge {
  position: absolute;
  top: 0.375rem;
  right: calc(50% - 1.125rem);
  min-width: 1rem;
  height: 1rem;
  background: var(--color-danger);
  color: #fff;
  font-size: 0.5625rem;
  font-weight: 700;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 0.25rem;
  border: 2px solid var(--color-bg-dark);
}

/* ============================================
   页面容器
   ============================================ */
.page {
  width: 100%;
  min-height: calc(100vh - 3rem - 4rem);
}

.page-header {
  text-align: center;
  padding: var(--spacing-md) 0;
}

.page-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-gold);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.page-subtitle {
  font-size: 0.8125rem;
  color: var(--color-text-dim);
  margin-top: var(--spacing-xs);
}

/* 区块面板 */
.section-panel {
  background: var(--color-bg-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.section-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-gold);
  margin-bottom: var(--spacing-sm);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.section-title::before {
  content: '▎';
  color: var(--color-primary-light);
}

/* ============================================
   网格布局
   ============================================ */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-sm);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-sm);
}

/* ============================================
   列表布局
   ============================================ */
.list-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid rgba(74, 48, 48, 0.5);
  transition: background var(--transition-fast);
}

.list-item:last-child {
  border-bottom: none;
}

.list-item:active {
  background: var(--color-bg-hover);
}

/* ============================================
   响应式
   ============================================ */
@media (min-width: 481px) {
  #app {
    padding-top: 3.5rem;
    padding-bottom: 5rem;
  }

  .bottom-nav {
    height: 4.5rem;
  }

  .nav-icon {
    font-size: 1.5rem;
  }

  .nav-icon-img {
    width: 2.125rem;
    height: 2.125rem;
  }

  .nav-label {
    font-size: 0.6875rem;
  }
}

@media (min-width: 768px) {
  #app {
    max-width: 480px;
    box-shadow: -1px 0 0 var(--color-border), 1px 0 0 var(--color-border);
  }

  .bottom-nav {
    max-width: 480px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 1rem 1rem 0 0;
    border-left: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
  }

  .header-bar {
    max-width: 480px;
    left: 50%;
    transform: translateX(-50%);
  }
}

/* ============================================
   安全区域适配 (iPhone X+)
   ============================================ */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  .bottom-nav {
    padding-bottom: env(safe-area-inset-bottom);
  }

  #app {
    padding-bottom: calc(4.5rem + env(safe-area-inset-bottom));
  }
}

/* ============================================
   移动端响应式 - 小屏适配
   ============================================ */
@media (max-width: 480px) {
  #app {
    padding-left: var(--spacing-sm);
    padding-right: var(--spacing-sm);
  }

  .page-title {
    font-size: 1.125rem;
  }

  .page-subtitle {
    font-size: 0.75rem;
  }

  .section-panel {
    padding: var(--spacing-sm);
  }

  .section-title {
    font-size: 0.8125rem;
  }

  .header-bar {
    height: 2.75rem;
    padding: 0 var(--spacing-sm);
  }

  .player-name {
    max-width: 3.75rem;
    font-size: 0.8125rem;
  }

  .header-right .currency {
    gap: 0.125rem;
    font-size: 0.6875rem;
  }

  .bottom-nav {
    height: 3.5rem;
  }

  .nav-icon {
    font-size: 1.25rem;
  }

  .nav-label {
    font-size: 0.5625rem;
  }

  .nav-icon-img {
    width: 1.8rem;
    height: 1.8rem;
  }

  /* Ensure nav tabs meet 44px touch target */
  .nav-tab {
    min-height: 2.75rem;
  }
}

@media (max-width: 360px) {
  #app {
    padding-left: var(--spacing-xs);
    padding-right: var(--spacing-xs);
  }

  .header-right {
    gap: var(--spacing-sm);
  }

  .header-right .currency {
    font-size: 0.625rem;
  }

  .player-level {
    font-size: 0.625rem;
    padding: 0.0625rem 0.375rem;
    min-width: 2.25rem;
  }
}