* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  /* 外层画布锁死：禁止页面滚动，只允许手机内部滚动 */
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  overscroll-behavior: none;
}

body {
  font-family: var(--font-sans);
  font-size: var(--t-15);
  color: var(--ink);
  /* 浅色外部背景：参考 港航Qwen-对话流.html 的 --demo-bg */
  background: #bac1d8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  display: flex;
  align-items: center;
  justify-content: center;
  /* 仅左右留边；上下用 flex 居中，避免溢出导致页面可滚动 */
  padding: 0 24px;
}

/* stage 也跟随视口高度，确保不会撑出滚动条 */
.stage {
  height: 100vh;
  height: 100dvh;
  max-height: 100dvh;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  margin: 0;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

input,
textarea {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  outline: 0;
  padding: 0;
  margin: 0;
}

ul,
ol {
  list-style: none;
  padding: 0;
  margin: 0;
}

img {
  max-width: 100%;
  display: block;
}

[hidden] {
  display: none !important;
}

/* Stage: desktop hosts a phone-shaped device */
.stage {
  width: min(100vw - 48px, 1200px);
  min-height: calc(var(--device-h) + 48px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.device {
  position: relative;
  width: var(--device-w);
  height: var(--device-h);
  border-radius: var(--device-radius);
  background: #16181c;
  padding: 10px;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.08) inset,
    0 30px 80px rgba(17, 19, 24, 0.18),
    0 8px 24px rgba(17, 19, 24, 0.10);
}

.app {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: calc(var(--device-radius) - 10px);
  background: var(--bg-page);
  overflow: hidden;
  isolation: isolate;
}

/* iPhone-style notch */
.notch {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 110px;
  height: 28px;
  border-radius: 16px;
  background: #0c0d10;
  z-index: 10;
}

/* Status bar */
.statusbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 6;
  height: 50px;
  padding: 16px 28px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--t-14);
  font-weight: var(--w-semibold);
  color: var(--ink);
  background: var(--bg-page);
  pointer-events: none;
}

/* itinerary 屏幕地图模式时 statusbar 可半透明 */
.app:has(.itin-screen[data-mode="map"]) .statusbar {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0.0));
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

/* HK 机场展开屏：statusbar 完全透明，让浅蓝底直接透上来 */
.app:has(.airport-screen) .statusbar {
  background: transparent;
}

.statusbar .right {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--t-12);
}

/* Layout regions */
.app-frame {
  position: absolute;
  inset: 0;
  padding-top: var(--safe-top);
  display: flex;
  flex-direction: column;
}

.feed {
  flex: 1;
  min-height: 0;
  position: relative; /* 让 children 的 offsetTop 基于 feed，scroll 计算可靠 */
  overflow-y: auto;
  overflow-x: hidden;
  padding: 8px 20px 24px;
  scroll-behavior: auto;
}

.feed::-webkit-scrollbar {
  display: none;
}

.feed {
  scrollbar-width: none;
}

/* Screen-level enter animation */
@keyframes screen-fade-up {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.app-frame.screen-enter > * {
  /* 该页面状态更新频繁，反复触发整屏入场动画会造成闪屏观感，改为禁用。 */
  animation: none;
}

/* ============================================================
   Mobile-first: strip device shell, fill viewport
   Matches the approach on airoute.fliggyflight.site
   ============================================================ */
@media (max-width: 640px) {
  :root {
    --safe-top: max(44px, env(safe-area-inset-top, 44px));
    --safe-bottom: max(16px, env(safe-area-inset-bottom, 16px));
    --device-radius: 0px;
  }

  html,
  body {
    width: 100%;
    height: 100dvh;
    height: 100vh; /* fallback */
    overscroll-behavior: none;
    -webkit-overflow-scrolling: touch;
  }

  body {
    display: block;
    padding: 0;
    background: var(--bg-page);
  }

  .stage {
    width: 100vw;
    height: 100dvh;
    height: 100vh;
    min-height: 0;
    max-height: none;
  }

  .device {
    width: 100%;
    height: 100%;
    padding: 0;
    border-radius: 0;
    background: var(--bg-page);
    box-shadow: none;
  }

  .app {
    border-radius: 0;
  }

  /* Hide fake notch & statusbar — real device provides these */
  .notch {
    display: none;
  }

  .statusbar {
    display: none;
  }

  /* Re-derive safe-top from real env() when statusbar is hidden */
  .app-frame {
    padding-top: env(safe-area-inset-top, 0px);
  }
}