:root {
  color-scheme: dark;
  --bg: #080d17;
  --panel: #111a2a;
  --panel-2: #172338;
  --line: #2b3a54;
  --text: #f6f8fb;
  --muted: #9aa8bd;
  --blue: #53a7ff;
  --green: #67d69b;
  --danger: #ff8e8e;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  background: radial-gradient(circle at top right, #162541 0, var(--bg) 42rem);
  color: var(--text);
}

button, input { font: inherit; }
button { cursor: pointer; }

.app-shell {
  width: min(100%, 1008px);
  margin: 0 auto;
  /* 顶部留白 = 安全区 + 20px 呼吸空间。
     不能只写 max(28px, env(safe-area-inset-top))：env() 并不总是可靠 ——
     Safari 未折叠地址栏时它常返回 0，只有独立窗口模式才给出状态栏高度，
     于是实际只剩兜底值，刘海屏上最上面那行会贴着状态栏/灵动岛。
     下面两条声明：第一条是纯 px 回退（万一某版 Safari 解析不了嵌套的
     max()/calc()，整条声明会被丢弃、留白归零，比原来更糟），第二条才是正式值。 */
  padding:
    48px
    max(14px, env(safe-area-inset-right))
    max(36px, env(safe-area-inset-bottom))
    max(14px, env(safe-area-inset-left));
  padding:
    max(48px, calc(env(safe-area-inset-top) + 20px))
    max(14px, env(safe-area-inset-right))
    max(36px, env(safe-area-inset-bottom))
    max(14px, env(safe-area-inset-left));
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 22px;
}

.eyebrow {
  margin: 0 0 7px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
}

h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 8px; font-size: clamp(29px, 7vw, 48px); letter-spacing: -.04em; }
h2 { margin-bottom: 5px; font-size: 20px; }
.intro { max-width: 640px; margin-bottom: 0; color: var(--muted); line-height: 1.55; }
.badge { padding-top: 5px; color: var(--blue); font-size: 12px; font-weight: 700; white-space: nowrap; }

.panel, .result-card {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  box-shadow: 0 14px 42px #0004;
}

.panel { padding: 18px; margin-bottom: 16px; }
.import-panel { padding: 12px; }
.file-picker {
  display: flex;
  align-items: center;
  gap: 13px;
  min-height: 70px;
  padding: 14px 16px;
  border: 1px dashed #4d76a6;
  border-radius: 15px;
  background: #14243a;
  color: var(--text);
}
.file-picker:active { background: #1b3150; }
.file-picker input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.file-icon { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 12px; background: #236cb7; font-size: 27px; }
.file-picker strong, .file-picker small { display: block; }
.file-picker small, .setting small { margin-top: 5px; color: var(--muted); font-size: 13px; line-height: 1.5; }
.status { margin: 10px 4px 1px; color: var(--muted); font-size: 13px; }

.settings-summary { display: flex; justify-content: space-between; gap: 12px; align-items: center; min-height: 44px; border-radius: 12px; cursor: pointer; list-style: none; }
.settings-summary::-webkit-details-marker { display: none; }
.settings-summary:focus-visible { outline: 2px solid var(--blue); outline-offset: 5px; }
/* 折叠态现在只有标题，标题自带的下外边距会让这一栏偏高，去掉 */
.settings-summary h2 { margin-bottom: 0; }
.settings-toggle { display: inline-flex; align-items: center; gap: 7px; flex: 0 0 auto; min-width: 104px; min-height: 44px; justify-content: center; padding: 8px 10px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel-2); color: var(--blue); font-size: 14px; font-weight: 700; }
.settings-toggle-close { display: none; }
.settings-chevron { font-size: 17px; line-height: 1; transition: transform .2s ease; }
.settings-panel[open] .settings-toggle-open { display: none; }
.settings-panel[open] .settings-toggle-close { display: inline; }
.settings-panel[open] .settings-chevron { transform: rotate(180deg); }
.settings-body { margin-top: 17px; padding-top: 17px; border-top: 1px solid var(--line); }
.settings-actions { display: flex; justify-content: flex-end; margin-bottom: 14px; }
.text-button { min-height: 44px; padding: 8px 4px; border: 0; background: none; color: var(--blue); font-size: 14px; }
.settings-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 22px; }
.setting { display: block; }
.setting > span { display: flex; justify-content: space-between; gap: 8px; font-size: 16px; }
output { color: var(--blue); font-weight: 600; font-variant-numeric: tabular-nums; }
input[type="range"] { --range-progress: 0%; appearance: none; -webkit-appearance: none; width: 100%; height: 44px; min-height: 44px; margin: 4px 0 0; background: transparent; cursor: pointer; }
input[type="range"]::-webkit-slider-runnable-track { height: 6px; border-radius: 999px; background: linear-gradient(to right, var(--blue) 0 var(--range-progress), #35445a var(--range-progress) 100%); }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 22px; height: 22px; margin-top: -8px; border: 2px solid #a6d2ff; border-radius: 50%; background: var(--blue); box-shadow: 0 1px 5px #0005; }
input[type="range"]::-moz-range-track { height: 6px; border-radius: 999px; background: #35445a; }
input[type="range"]::-moz-range-progress { height: 6px; border-radius: 999px; background: var(--blue); }
input[type="range"]::-moz-range-thumb { width: 18px; height: 18px; border: 2px solid #a6d2ff; border-radius: 50%; background: var(--blue); }
input[type="range"]:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; border-radius: 8px; }

.side-options { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 14px; margin-top: 20px; padding-top: 15px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.side-options label { display: inline-flex; align-items: center; min-height: 44px; gap: 4px; color: var(--text); font-size: 14px; }
.side-label { margin-right: 2px; color: var(--muted); }
.side-options input { accent-color: var(--blue); }

.primary-button, .secondary-button {
  border: 0;
  border-radius: 11px;
  padding: 10px 14px;
  color: white;
  font-weight: 700;
}
.primary-button { background: #096bbf; }
.primary-button:disabled, .secondary-button:disabled { opacity: .5; cursor: default; }
.primary-button.small { margin-left: auto; min-height: 44px; padding: 8px 12px; font-size: 14px; }
.secondary-button { border: 1px solid var(--line); background: var(--panel-2); }

.results { display: grid; gap: 16px; }
.empty { padding: 44px 18px; border: 1px dashed var(--line); border-radius: 20px; color: var(--muted); text-align: center; }
.batch-actions { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 15px 18px; }
.batch-actions strong, .batch-actions small { display: block; }
.batch-actions small { margin-top: 4px; color: var(--muted); font-size: 12px; line-height: 1.45; }
.batch-buttons { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.batch-buttons button { white-space: nowrap; }
.result-card { overflow: hidden; }
.result-head { display: flex; justify-content: space-between; gap: 12px; align-items: flex-start; padding: 16px 18px 13px; border-bottom: 1px solid var(--line); }
.result-head h3 { margin: 0 0 5px; font-size: 16px; word-break: break-all; }
.result-head p { margin: 0; color: var(--muted); font-size: 12px; }
.detected { color: var(--green) !important; text-align: right; }
.actual-crop { margin: 12px 18px 0; color: var(--blue); font-size: 12px; line-height: 1.5; }
.viewer-note { margin: 8px 18px 0; color: var(--muted); font-size: 12px; line-height: 1.5; }
.viewer-option { display: block; min-height: 44px; margin-top: 18px; font-size: 16px; line-height: 1.6; }
.viewer-option small { display: block; margin-top: 6px; color: var(--muted); font-size: 13px; line-height: 1.5; }
.batch-actions[hidden] { display: none; }
.preview-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 14px 18px; }
.preview-block { min-width: 0; }
.preview-block > span { display: block; margin-bottom: 7px; color: var(--muted); font-size: 12px; }
/* 预览里的图片必须「贴合自身内容」，不能撑满格子宽度。
   原因：原写法 width:100% + max-height + object-fit:contain，当结果是竖版时
   max-height 会生效，元素框被拉成比图片更宽的比例，左右各空出一条被
   background: #05070b 填满的区域。那个颜色与真正的黑边(#000000)对比只有
   1.04:1，肉眼分不清「这是照片里的黑边」还是「这是容器底」。
   实测 22 张里 6 张竖版结果受影响（IMG_0776 左右各空 68px）。
   改成 width:auto 后元素框 = 图片本身，留白从根上消失；再加 1px 描边把
   图片边界显性化。横版/正方结果元素框尺寸完全不变，不受影响。 */
.preview-canvas, .result-image {
  display: block;
  width: auto;
  max-width: 100%;
  max-height: 560px;
  margin: 0 auto;
  object-fit: contain;
  border-radius: 12px;
  background: transparent;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.26);
}
.preview-canvas { height: auto; }
/* 不再设 min-height：宽度自适应后元素必有真实高度，而没有 min-height 才能
   保证极宽的全景图不会被纵向拉伸变形。 */

.fine-tune { padding: 0 18px 15px; }
.fine-tune summary { min-height: 44px; padding: 12px 0; cursor: pointer; color: var(--blue); font-size: 13px; }
.crop-inputs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; margin-top: 13px; }
.crop-inputs label { color: var(--muted); font-size: 13px; }
.crop-inputs input { width: 100%; min-height: 44px; margin-top: 5px; padding: 8px; border: 1px solid var(--line); border-radius: 8px; background: #0a111e; color: var(--text); font-size: 16px; }
.card-actions { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 9px; padding: 0 18px 17px; }
.card-actions button { min-height: 44px; padding: 9px 12px; font-size: 13px; }
.error { padding: 12px 18px; color: var(--danger); font-size: 13px; }

.footer-note { margin: 20px 3px 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
.footer-note p { margin-bottom: 7px; }

@media (max-width: 650px) {
  .hero { position: relative; display: block; }
  .hero .eyebrow { padding-right: 140px; }
  .hero .badge { position: absolute; top: 0; right: 0; }
  .settings-grid, .preview-grid { grid-template-columns: 1fr; }
  .preview-canvas, .result-image { max-height: 480px; }
  .crop-inputs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .batch-actions { align-items: stretch; flex-direction: column; }
  .batch-buttons { justify-content: stretch; }
  .batch-buttons button { flex: 1; }
  .result-head { padding-left: 14px; padding-right: 14px; }
  .preview-grid, .fine-tune, .card-actions { padding-left: 14px; padding-right: 14px; }
}
.ocr-status { color: var(--muted); font-size: 13px; line-height: 1.5; margin: 8px 0 16px; }