/*
 * Travel Assistant — 全局样式
 *
 * 基于 AI Studio 原型的视觉规范：
 *   - 主色 #236296（深蓝）
 *   - 浅蓝容器 #8ec5ff
 *   - 深蓝文字 #045285
 *   - 背景 #f6fafd
 *   - 边框 #E1E8F0
 *   - 移动端优先（基准 390px）
 */

/* ========== CSS Variables ========== */
:root {
  /* 主色系（Trips 模块） */
  --color-primary: #236296;
  --color-on-primary: #ffffff;
  --color-primary-container: #8ec5ff;
  --color-on-primary-container: #045285;

  /* 账本模块（MVP2） */
  --color-expense-primary: #745b00;
  --color-expense-accent: #fdd669;
  --color-expense-bg: #FFFCF2;

  /* 中性色 */
  --color-bg: #f6fafd;
  --color-surface: #f6fafd;
  --color-surface-dim: #d6dbdd;
  --color-container-low: #f0f4f7;
  --color-container: #eaeef1;
  --color-container-high: #e5e9ec;
  --color-container-highest: #dfe3e6;
  --color-text: #1A1C1E;
  --color-text-secondary: #606468;
  --color-text-tertiary: #727780;
  --color-border: #E1E8F0;
  --color-danger: #ef4444;

  --radius-lg: 12px;
  --radius-md: 8px;
  --radius-sm: 6px;

  --shadow-card: 0 4px 15px rgba(0, 0, 0, 0.06);
  --shadow-card-lg: 0 8px 24px rgba(4, 82, 133, 0.12);
  --shadow-2xs: 0 1px 2px rgba(0, 0, 0, 0.04);

  --nav-height: 48px;
}

/* ========== Reset ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  font-size: 16px;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

a { color: inherit; text-decoration: none; }
button { border: none; background: none; cursor: pointer; font: inherit; }
img { max-width: 100%; display: block; }
input, textarea, select {
  font: inherit;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  outline: none;
  width: 100%;
  background: var(--color-container-low);
  color: var(--color-text);
}
input:focus, textarea:focus, select:focus {
  border-color: var(--color-primary);
  background: #fff;
}

/* ========== 页面容器（390px 居中） ========== */
#app-content {
  max-width: 390px;
  margin: 0 auto;
  padding: 16px 12px calc(var(--nav-height) + 24px);
  min-height: 100vh;
  overflow-x: hidden;  /* 防止内部横向内容撑宽页面 */
}

.page {
  max-width: 390px;
  margin: 0 auto;
}

/* ========== 页面头部（行程/账本共用，避免两套实现参数飘开） ========== */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}
.page-eyebrow {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  font-weight: 800;
  color: var(--color-on-primary-container);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}
.page-eyebrow svg {
  width: 13px;
  height: 13px;
}
/* 账本页头部修饰：暖金色 eyebrow（叠加在共用类上，不再另起一套） */
.page-eyebrow--expense {
  color: var(--color-expense-primary);
}
.page-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.01em;
}
/* 头部主按钮（新建行程 / 记一笔账）统一尺寸与布局：走 .btn 基础类 + 颜色 modifier
   紧凑高度对齐 AI Studio V5 原型（text-[11px] px-3 py-1.5），覆盖 .btn 基类的 8px/14px */
.page-header .btn {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  box-shadow: var(--shadow-2xs);
  padding: 6px 12px;
  font-size: 11px;
}

/* ========== 卡片 ========== */
.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s;
}
.card:active {
  box-shadow: var(--shadow-card-lg);
}

/* ========== 表单 ========== */
.form-group {
  margin-bottom: 12px;
}
/* flex 并排的字段组（如出发/返程日期）：子项默认 min-width:auto，date 输入框有固有
   最小宽度，两个并排会把父容器撑破溢出。允许子项收缩到 0 解决 */
.form-group > div {
  min-width: 0;
}
.form-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}
.form-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

/* ========== 按钮 ========== */
.btn {
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 12px;
  font-weight: 700;
  text-align: center;
  transition: background 0.15s;
}
.btn:active { opacity: 0.85; }
.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-on-primary-container); }
.btn-secondary {
  background: #fff;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover { background: var(--color-container-low); }
.btn-danger {
  background: var(--color-danger);
  color: #fff;
}

/* ========== 空状态 ========== */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--color-text-secondary);
}
.empty-state .empty-icon {
  font-size: 40px;
  margin-bottom: 12px;
}
.empty-state .empty-text {
  font-size: 14px;
  margin-bottom: 16px;
  color: var(--color-text);
}

/* ========== Loading ========== */
.loading {
  text-align: center;
  padding: 40px;
  color: var(--color-text-secondary);
}
.loading::after {
  content: "加载中";
  animation: loading-dot 1.2s steps(4, jump-none) infinite;
}
@keyframes loading-dot {
  0%   { content: "加载中"; }
  25%  { content: "加载中."; }
  50%  { content: "加载中.."; }
  75%  { content: "加载中..."; }
}

/* ========== 骨架屏 ========== */
.skeleton {
  background: linear-gradient(90deg, var(--color-container-low) 25%, var(--color-container-high) 37%, var(--color-container-low) 63%);
  background-size: 400% 100%;
  animation: skeleton-loading 1.4s ease infinite;
  border-radius: var(--radius-sm);
}
@keyframes skeleton-loading {
  0%   { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ========== Toast ========== */
.toast {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.78);
  color: #fff;
  padding: 10px 20px;
  border-radius: 20px;
  font-size: 13px;
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.toast.show {
  opacity: 1;
}

/* ========== 弹窗 ========== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.modal-box {
  background: #fff;
  border-radius: 16px;
  max-width: 100%;
  width: 100%;
  padding: 16px;
  border: 1px solid var(--color-border);
  box-shadow: 0 16px 32px rgba(0,0,0,0.15);
  max-height: 90vh;
  overflow-y: auto;
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 8px;
  margin-bottom: 12px;
}
.modal-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text);
}
.modal-close {
  color: var(--color-text-secondary);
  padding: 4px;
  font-size: 18px;
}

/* ========== 登录弹层（自建认证，2026-08-05 起） ========== */
.login-overlay {
  position: fixed;
  inset: 0;
  z-index: 300; /* 盖住所有内容与弹窗，但低于 toast（999） */
  background: linear-gradient(160deg, #236296 0%, #0d4a77 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-box {
  width: 100%;
  max-width: 320px;
  background: #fff;
  border-radius: 16px;
  padding: 28px 24px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.25);
}
.login-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 4px;
}
.login-subtitle {
  font-size: 13px;
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: 20px;
}
.login-input {
  width: 100%;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0 14px;
  font-size: 15px;
  margin-bottom: 12px;
  background: var(--color-container-low);
  color: var(--color-text);
}
.login-input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #fff;
}
.login-btn {
  width: 100%;
  height: 44px;
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}
.login-btn:active { opacity: 0.85; }
.login-btn:disabled { opacity: 0.6; }
.login-error {
  color: var(--color-danger);
  font-size: 13px;
  margin-bottom: 10px;
  text-align: center;
}

/* 登出小按钮（行程页页头） */
.btn-logout {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  background: #fff;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}
.btn-logout:hover { background: var(--color-container-low); }

/* ========== 悬浮底栏（含中央 FAB） ========== */
#app-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  pointer-events: none;
  padding: 0 16px 10px;
}
.nav-pill {
  max-width: 390px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  box-shadow: var(--shadow-card-lg);
  padding: 6px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  pointer-events: auto;
}
.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  color: var(--color-text-tertiary);
  font-size: 10px;
  font-weight: 700;
  transition: color 0.2s;
  padding: 4px 8px;
}
.nav-item.active {
  color: var(--color-primary);
}
/* 账本页（router 在 #app-nav 上切 nav-expenses 类）：账本 tab 高亮变黄 */
.nav-expenses .nav-item.active {
  color: var(--color-expense-primary);
}
.nav-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-icon svg {
  width: 20px;
  height: 20px;
  stroke-width: 2.2;
}

.fab {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 0 0 4px rgba(142, 197, 255, 0.35), 0 4px 12px rgba(35, 98, 150, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s, background 0.2s, box-shadow 0.2s;
  flex-shrink: 0;
}
.fab:active { transform: scale(0.92); }
/* 账本页：FAB 暗金色圆底 + 白色加号 + 黄色光晕（与行程页蓝色光晕呼应） */
.nav-expenses .fab {
  background: var(--color-expense-primary);
  color: #fff;
  box-shadow: 0 0 0 4px rgba(253, 214, 105, 0.4), 0 4px 12px rgba(253, 214, 105, 0.45);
}
.fab-plus {
  font-size: 24px;
  font-weight: 300;
  line-height: 1;
  transform: translateY(-1px);
}

/* ===== FAB 快速菜单 ===== */
.fab-overlay {
  position: fixed;
  inset: 0;
  z-index: 150;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 96px;
}
.fab-menu {
  background: #fff;
  border-radius: 16px;
  padding: 16px;
  border: 1px solid var(--color-border);
  box-shadow: 0 16px 32px rgba(0,0,0,0.2);
  width: 256px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  animation: scaleUp 0.2s ease;
}
.fab-menu-title {
  font-size: 10px;
  font-weight: 800;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0 8px 8px;
  border-bottom: 1px solid var(--color-border);
}
.fab-menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px;
  border-radius: 12px;
  text-align: left;
  transition: background 0.15s;
}
.fab-menu-item:hover { background: rgba(142,197,255,0.15); }
.fab-menu-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.fab-menu-icon.trips {
  background: var(--color-primary);
  color: #fff;
}
.fab-menu-icon.expense {
  background: var(--color-expense-accent);
  color: #241a00;
}
.fab-menu-name {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-text);
}
.fab-menu-desc {
  display: block;
  font-size: 10px;
  color: var(--color-text-secondary);
}

/* ========== 动画 ========== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.animate-fadeIn {
  animation: fadeIn 0.2s ease;
}
@keyframes scaleUp {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}
.animate-scaleUp {
  animation: scaleUp 0.2s ease;
}

/* ========== PWA 安装引导横幅 ========== */
.pwa-install-banner {
  position: fixed;
  left: 0;
  right: 0;
  bottom: calc(var(--nav-height) + 8px); /* 悬浮在底部导航上方 */
  z-index: 1000;
  display: flex;
  justify-content: center;
  pointer-events: none;   /* 只有横幅本体可点，透明区域不挡页面 */
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.pwa-install-banner.show {
  opacity: 1;
  transform: translateY(0);
}
.pwa-install-inner {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--color-primary, #236296);
  color: #fff;
  padding: 10px 16px;
  border-radius: 24px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  font-size: 14px;
}
.pwa-install-text b {
  color: var(--color-expense-accent, #fdd669);
}
.pwa-install-btn {
  background: var(--color-expense-accent, #fdd669);
  color: var(--color-expense-primary, #745b00);
  border: none;
  border-radius: 16px;
  padding: 6px 14px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
}
.pwa-install-btn:hover {
  background: #e8c358;
}
.pwa-install-close {
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  line-height: 1;
  padding: 2px 4px;
  cursor: pointer;
}
.pwa-install-arrow {
  font-size: 18px;
  line-height: 1;
  animation: pwaBounce 1.2s infinite;
}
@keyframes pwaBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(4px); }
}