/* ==========================================================================
   PicPress 图片压缩工坊 — 样式表
   ---------------------------------------------------------------------------
   设计目标：像一个打磨过的桌面级工具，而不是一张表单。
     · 深青绿主色源自应用图标，辅以黄铜色点缀，明暗两套主题同等对待；
     · 层次靠「环境光 + 细边框 + 多层柔和阴影」堆出来，不靠粗色块；
     · 信息密度优先：手机上单手能点，电脑上一屏能看完关键信息；
     · 所有动效都尊重 prefers-reduced-motion，装饰不抢内容。
   移动优先，零依赖，纯手写。
   ========================================================================== */

/* ------------------------------------------------------------ 设计令牌 -- */

:root {
  color-scheme: light;

  /* 品牌 */
  --accent: #0f766e;
  --accent-strong: #0a5b54;
  --accent-bright: #14b8a6;
  --accent-soft: #e3f3ef;
  --accent-glow: rgba(15, 118, 110, 0.24);
  --accent-2: #b0803f;
  --accent-2-soft: #f8efe1;

  /* 表面与文字 */
  --bg: #edf1f0;
  --bg-top: #f7faf9;
  --surface: #ffffff;
  --surface-2: #f3f6f5;
  --surface-3: #e6ecea;
  --border: #dde5e2;
  --border-strong: #c5d1cd;
  --text: #0b1917;
  --text-dim: #4e5e5a;
  --text-faint: #67746f;

  /* 语义色 */
  --danger: #b42318;
  --danger-soft: #fdecea;
  --warn: #8f5511;
  --warn-soft: #fcf3e3;

  /* 组件专用 */
  --seg-active-bg: #ffffff;
  --btn-primary-text: #ffffff;
  --field-bg: #f4f7f6;
  --field-bg-focus: #ffffff;
  --field-border: #dbe3e0;
  --card-bg: rgba(255, 255, 255, 0.93);
  --header-bg: rgba(247, 250, 249, 0.72);
  --chevron: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2367746f' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");

  /* 圆角与阴影 */
  --radius-lg: 22px;
  --radius: 16px;
  --radius-sm: 11px;
  --radius-xs: 8px;

  --shadow-xs: 0 1px 2px rgba(9, 24, 21, 0.05);
  --shadow-sm: 0 1px 2px rgba(9, 24, 21, 0.05), 0 3px 8px -3px rgba(9, 24, 21, 0.09);
  --shadow: 0 1px 2px rgba(9, 24, 21, 0.04), 0 14px 32px -20px rgba(9, 24, 21, 0.28),
    0 3px 10px -5px rgba(9, 24, 21, 0.07);
  --shadow-lg: 0 24px 60px -34px rgba(9, 24, 21, 0.36), 0 3px 10px -5px rgba(9, 24, 21, 0.08);
  --ring: inset 0 1px 0 rgba(255, 255, 255, 0.7);
  --hairline: rgba(9, 24, 21, 0.06);

  /* 字体与节奏 */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", monospace;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --noise: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;

    --accent: #2dd4bf;
    --accent-strong: #7ff0e2;
    --accent-bright: #5eead4;
    --accent-soft: rgba(45, 212, 191, 0.13);
    --accent-glow: rgba(45, 212, 191, 0.28);
    --accent-2: #e0b06a;
    --accent-2-soft: rgba(224, 176, 106, 0.13);

    --bg: #080d0e;
    --bg-top: #0c1314;
    --surface: #111a1b;
    --surface-2: #172223;
    --surface-3: #1f2c2d;
    --border: #24312f;
    --border-strong: #34443f;
    --text: #edf4f2;
    --text-dim: #a5b3ae;
    --text-faint: #7d8b86;

    --danger: #fda29b;
    --danger-soft: rgba(253, 162, 155, 0.12);
    --warn: #f2b866;
    --warn-soft: rgba(242, 184, 102, 0.12);

    --seg-active-bg: #223231;
    --btn-primary-text: #04211d;
    --field-bg: #1b2829;
    --field-bg-focus: #213233;
    --field-border: #2e3f3b;
    --card-bg: rgba(17, 26, 27, 0.9);
    --header-bg: rgba(12, 19, 20, 0.7);
    --chevron: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%237d8b86' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.45), 0 3px 10px -3px rgba(0, 0, 0, 0.5);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.5), 0 18px 40px -22px rgba(0, 0, 0, 0.75),
      0 3px 12px -6px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 30px 70px -36px rgba(0, 0, 0, 0.85), 0 3px 12px -6px rgba(0, 0, 0, 0.5);
    --ring: inset 0 1px 0 rgba(255, 255, 255, 0.045);
    --hairline: rgba(255, 255, 255, 0.05);
  }
}

/* ---------------------------------------------------------------- 基础 -- */

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
  background-image: linear-gradient(180deg, var(--bg-top) 0%, var(--bg) 44%, var(--bg) 100%);
  background-attachment: fixed;
  padding-bottom: env(safe-area-inset-bottom);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 环境光：两团带品牌色的柔光，让纯色背景有纵深，但完全不抢内容 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(640px 460px at 4% -10%, color-mix(in srgb, var(--accent) 17%, transparent), transparent 68%),
    radial-gradient(700px 520px at 98% 2%, color-mix(in srgb, var(--accent-2) 13%, transparent), transparent 70%),
    radial-gradient(900px 620px at 52% 112%, color-mix(in srgb, var(--accent) 9%, transparent), transparent 74%);
}

/* 极淡的颗粒，模拟纸张/印刷的质感；只有 2.5% 不透明度，不影响阅读 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 80;
  pointer-events: none;
  opacity: 0.025;
  background-image: var(--noise);
  background-size: 140px 140px;
}

h1, h2, h3, p, ul, ol, fieldset { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img { max-width: 100%; }

/* JS 用 element.hidden 控制显隐；这里强制它压过任何 display 声明，
   否则 .progress / .stats 这类 flex/grid 元素会「藏不住」 */
[hidden] { display: none !important; }

::selection {
  background: color-mix(in srgb, var(--accent) 26%, transparent);
  color: var(--text);
}

/* ---------------------------------------------------------------- 页头 -- */

.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 16px;
  padding: 10px clamp(16px, 4vw, 34px);
  background: var(--bg-top);
  background: var(--header-bg);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
  box-shadow: 0 14px 34px -30px rgba(9, 24, 21, 0.5);
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-mark-wrap {
  position: relative;
  display: grid;
  place-items: center;
  flex: none;
}

.brand-mark-wrap::after {
  content: "";
  position: absolute;
  inset: -5px;
  border-radius: 16px;
  border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
  pointer-events: none;
}

.brand-mark {
  display: block;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  box-shadow: 0 8px 18px -10px var(--accent-glow),
    0 0 0 1px color-mix(in srgb, var(--accent) 18%, transparent);
}

.brand-text h1 {
  font-size: 18.5px;
  font-weight: 750;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.brand-text p {
  font-size: 11.5px;
  font-weight: 500;
  color: var(--text-dim);
  letter-spacing: 0.04em;
  line-height: 1.3;
}

.privacy-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.005em;
  color: var(--accent-strong);
  background: var(--accent-soft);
  background: color-mix(in srgb, var(--accent-soft) 80%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
  padding: 7px 13px;
  border-radius: 999px;
  box-shadow: var(--shadow-xs), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.privacy-dot {
  position: relative;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}

.privacy-dot::after {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  opacity: 0.4;
  animation: privacy-pulse 2.8s var(--ease) infinite;
}

@keyframes privacy-pulse {
  0% { transform: scale(0.7); opacity: 0.5; }
  70% { transform: scale(1.6); opacity: 0; }
  100% { transform: scale(1.6); opacity: 0; }
}

/* -------------------------------------------------------------- 主容器 -- */

main {
  max-width: 940px;
  margin: 0 auto;
  padding: clamp(14px, 3vw, 28px);
  padding-bottom: clamp(24px, 4vw, 44px);
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 2.2vw, 20px);
}

/* ------------------------------------------------------------ 开场文案 -- */

.hero {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 13px;
  padding: clamp(22px, 4vw, 40px) 4px clamp(6px, 1vw, 10px);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow-rule {
  width: 26px;
  height: 1px;
  flex: none;
  background: currentColor;
  opacity: 0.55;
}

.hero-title {
  max-width: 24ch;
  font-size: clamp(27px, 4.4vw, 42px);
  font-weight: 750;
  line-height: 1.14;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.hero-title em {
  font-style: normal;
  background: linear-gradient(96deg, var(--accent), color-mix(in srgb, var(--accent) 72%, var(--accent-2)));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--accent);
}

.hero-sub {
  max-width: 620px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--text-dim);
  text-wrap: pretty;
}

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.hero-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-dim);
  background: color-mix(in srgb, var(--surface) 62%, transparent);
  border: 1px solid color-mix(in srgb, var(--border) 85%, transparent);
  border-radius: 999px;
  box-shadow: var(--shadow-xs);
}

.hero-chip svg {
  width: 14px;
  height: 14px;
  flex: none;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* -------------------------------------------------------------- 步骤条 -- */

.steps {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 0 4px;
  margin-top: -2px;
}

.step {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-faint);
  transition: color 0.2s var(--ease);
}

.step:not(:last-child)::after {
  content: "";
  flex: 1;
  height: 1px;
  margin-left: 4px;
  background: linear-gradient(90deg, var(--border-strong), color-mix(in srgb, var(--border) 25%, transparent));
}

.step-num {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  flex: none;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--text-faint);
  box-shadow: var(--shadow-xs);
  transition: background 0.22s var(--ease), color 0.22s var(--ease),
    border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

/* 高亮当前步骤。用 :has() 直接读卡片的 hidden 状态，不需要任何脚本参与；
   不支持 :has() 的浏览器只是没有高亮，功能不受影响。 */
body:not(:has(#settingsCard:not([hidden]))) .step:nth-child(1),
body:has(#settingsCard:not([hidden])):not(:has(#resultsCard:not([hidden]))) .step:nth-child(2),
body:has(#resultsCard:not([hidden])) .step:nth-child(3) {
  color: var(--text);
}

body:not(:has(#settingsCard:not([hidden]))) .step:nth-child(1) .step-num,
body:has(#settingsCard:not([hidden])):not(:has(#resultsCard:not([hidden]))) .step:nth-child(2) .step-num,
body:has(#resultsCard:not([hidden])) .step:nth-child(3) .step-num {
  color: var(--btn-primary-text);
  border-color: transparent;
  background: linear-gradient(150deg, var(--accent), color-mix(in srgb, var(--accent) 62%, var(--accent-bright)));
  box-shadow: 0 0 0 4px var(--accent-soft), 0 8px 18px -10px var(--accent-glow);
}

body:has(#settingsCard:not([hidden])) .step:nth-child(1) .step-num,
body:has(#resultsCard:not([hidden])) .step:nth-child(2) .step-num {
  color: var(--accent-strong);
  border-color: transparent;
  background: color-mix(in srgb, var(--accent) 13%, var(--surface));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 26%, transparent);
}

body:has(#settingsCard:not([hidden])) .step:nth-child(1),
body:has(#resultsCard:not([hidden])) .step:nth-child(2) {
  color: var(--text-dim);
}

/* 一旦选好图片，开场文案就让位：收起 hero、把拖放区压成一条「继续添加」的窄条，
   设置卡片直接出现在眼前。纯 CSS，靠卡片的 hidden 状态驱动。 */
body:has(#settingsCard:not([hidden])) .hero { display: none; }

body:has(#settingsCard:not([hidden])) .dropzone-body {
  gap: 9px;
  padding: 16px 14px;
}

body:has(#settingsCard:not([hidden])) .dropzone-icon {
  width: 56px;
  height: 56px;
  margin-bottom: 0;
  border-radius: 18px;
}

body:has(#settingsCard:not([hidden])) .dropzone-icon svg {
  width: 24px;
  height: 24px;
}

body:has(#settingsCard:not([hidden])) .dropzone-icon::after {
  inset: -8px;
  border-radius: 23px;
}

body:has(#settingsCard:not([hidden])) .dropzone-title { font-size: 16.5px; }

body:has(#settingsCard:not([hidden])) .dropzone-sub,
body:has(#settingsCard:not([hidden])) .dropzone-meta {
  display: none;
}

body:has(#settingsCard:not([hidden])) .dropzone .btn {
  min-height: 38px;
  font-size: 13px;
}

/* ---------------------------------------------------------------- 卡片 -- */

.card {
  position: relative;
  background: var(--surface);
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow), var(--ring);
  padding: clamp(18px, 2.6vw, 28px);
  scroll-margin-top: 88px;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 14px;
  margin-bottom: 18px;
}

.card-head h2 {
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.card-head-actions { display: flex; flex-wrap: wrap; gap: 6px; }

/* ------------------------------------------------------------ 拖放区域 -- */

.dropzone {
  padding: clamp(6px, 1.4vw, 10px);
  border: 1.5px dashed color-mix(in srgb, var(--accent) 30%, var(--border-strong));
  background:
    radial-gradient(140% 130% at 50% -30%, color-mix(in srgb, var(--accent) 9%, transparent), transparent 62%),
    color-mix(in srgb, var(--surface) 90%, transparent);
  transition: border-color 0.2s var(--ease), box-shadow 0.25s var(--ease),
    background 0.25s var(--ease), transform 0.25s var(--ease);
}

.dropzone:hover {
  border-color: color-mix(in srgb, var(--accent) 52%, transparent);
  box-shadow: var(--shadow), var(--ring);
}

.dropzone.is-over {
  border-style: solid;
  border-color: var(--accent);
  background:
    radial-gradient(140% 130% at 50% -20%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 64%),
    color-mix(in srgb, var(--surface) 92%, transparent);
  box-shadow: 0 0 0 5px var(--accent-soft), 0 24px 48px -30px var(--accent-glow), var(--shadow);
  transform: translateY(-2px);
}

.dropzone-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 13px;
  padding: clamp(24px, 5vw, 46px) 14px;
  text-align: center;
}

.dropzone-icon {
  position: relative;
  display: grid;
  place-items: center;
  width: 76px;
  height: 76px;
  margin-bottom: 2px;
  border-radius: 24px;
  color: var(--btn-primary-text);
  background: linear-gradient(148deg, color-mix(in srgb, var(--accent) 82%, #fff) 0%, var(--accent) 46%, var(--accent-bright) 100%);
  box-shadow: 0 18px 34px -18px var(--accent-glow),
    inset 0 1px 0 rgba(255, 255, 255, 0.4),
    0 0 0 1px color-mix(in srgb, var(--accent) 26%, transparent);
}

.dropzone-icon::after {
  content: "";
  position: absolute;
  inset: -11px;
  border-radius: 30px;
  border: 1px dashed color-mix(in srgb, var(--accent) 26%, transparent);
  pointer-events: none;
}

.dropzone-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.dropzone-sub {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--text-faint);
}

.dropzone-sub::before,
.dropzone-sub::after {
  content: "";
  width: 38px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong));
}

.dropzone-sub::after {
  background: linear-gradient(90deg, var(--border-strong), transparent);
}

.dropzone-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 2px;
}

.dropzone-meta {
  max-width: 46ch;
  margin-top: 2px;
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: 0.01em;
}

/* ---------------------------------------------------------------- 按钮 -- */

.btn {
  appearance: none;
  -webkit-appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 9px 16px;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--surface) 88%, #fff), var(--surface));
  color: var(--text);
  font: inherit;
  font-size: 13.5px;
  font-weight: 650;
  letter-spacing: 0.004em;
  white-space: nowrap;
  cursor: pointer;
  box-shadow: var(--shadow-xs);
  transition: background 0.16s var(--ease), border-color 0.16s var(--ease),
    box-shadow 0.18s var(--ease), transform 0.1s var(--ease), color 0.16s var(--ease);
}

.btn svg {
  width: 16px;
  height: 16px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.btn:hover:not(:disabled) {
  background: var(--surface-2);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.btn:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: var(--shadow-xs);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-primary {
  color: var(--btn-primary-text);
  border-color: color-mix(in srgb, var(--accent) 78%, #000);
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--accent) 78%, #fff) 0%,
    var(--accent) 52%,
    color-mix(in srgb, var(--accent) 86%, #000) 100%
  );
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.24), 0 10px 22px -12px var(--accent-glow),
    var(--shadow-xs);
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.14);
}

.btn-primary:hover:not(:disabled) {
  border-color: color-mix(in srgb, var(--accent) 70%, #000);
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--accent) 70%, #fff) 0%,
    color-mix(in srgb, var(--accent) 92%, #fff) 52%,
    color-mix(in srgb, var(--accent) 80%, #000) 100%
  );
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.28), 0 16px 30px -14px var(--accent-glow),
    var(--shadow-sm);
}

.btn-quiet {
  min-height: 34px;
  padding: 6px 11px;
  border-color: transparent;
  background: transparent;
  color: var(--text-dim);
  font-size: 12.5px;
  box-shadow: none;
}

.btn-quiet:hover:not(:disabled) {
  background: var(--surface-2);
  border-color: transparent;
  color: var(--text);
  box-shadow: none;
  transform: none;
}

.btn-danger-quiet:hover:not(:disabled) {
  background: var(--danger-soft);
  color: var(--danger);
}

.btn-lg {
  min-height: 50px;
  padding: 12px 26px;
  border-radius: 14px;
  font-size: 15px;
  letter-spacing: 0.01em;
}

.btn-lg svg { width: 18px; height: 18px; }

.btn-tiny {
  appearance: none;
  -webkit-appearance: none;
  min-height: 34px;
  padding: 7px 13px;
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  background: var(--surface);
  color: var(--text-dim);
  font: inherit;
  font-size: 12px;
  font-weight: 650;
  white-space: nowrap;
  cursor: pointer;
  box-shadow: var(--shadow-xs);
  transition: background 0.15s var(--ease), color 0.15s var(--ease), border-color 0.15s var(--ease);
}

.btn-tiny:hover {
  background: var(--surface-2);
  border-color: var(--border-strong);
  color: var(--text);
}

/* ------------------------------------------------------------ 文件信息 -- */

.filebar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  padding: 11px 14px;
  margin-bottom: 22px;
  font-size: 13px;
  background: color-mix(in srgb, var(--surface-2) 70%, transparent);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.filebar-count {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.filebar-count::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 2px;
  flex: none;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.filebar-size { color: var(--text-dim); font-variant-numeric: tabular-nums; }
.filebar-note { color: var(--warn); font-size: 12px; }

/* ------------------------------------------------------------ 表单控件 -- */

.field {
  border: 0;
  padding: 0;
  margin: 0 0 22px;
}

.field:last-of-type { margin-bottom: 0; }

#settingsCard { counter-reset: section; }
#settingsCard > .field { counter-increment: section; }

.field legend {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0;
  margin-bottom: 12px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.field legend::before,
#namingDetails > summary::before {
  content: counter(section, decimal-leading-zero);
  display: inline-grid;
  place-items: center;
  min-width: 27px;
  height: 20px;
  padding: 0 6px;
  flex: none;
  border-radius: 6px;
  border: 1px solid color-mix(in srgb, var(--accent) 15%, transparent);
  background: color-mix(in srgb, var(--accent-soft) 85%, transparent);
  color: var(--accent-strong);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.preview-title {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding: 0;
  margin-bottom: 9px;
}

.label {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.005em;
  color: var(--text-dim);
}

.input {
  width: 100%;
  min-height: 42px;
  padding: 9px 12px;
  font: inherit;
  font-size: 14px;
  color: var(--text);
  background: var(--field-bg);
  border: 1px solid var(--field-border);
  border-radius: 10px;
  box-shadow: inset 0 1px 2px rgba(9, 24, 21, 0.03);
  transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease),
    background 0.15s var(--ease);
}

.input:hover { border-color: var(--border-strong); }

.input:focus {
  outline: none;
  background: var(--field-bg-focus);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}

.input-narrow { width: 120px; flex: none; }

.input-color {
  width: 58px;
  height: 42px;
  padding: 3px;
  flex: none;
  cursor: pointer;
}

.input-color::-webkit-color-swatch-wrapper { padding: 0; }
.input-color::-webkit-color-swatch {
  border: 1px solid color-mix(in srgb, var(--text) 12%, transparent);
  border-radius: 6px;
}

select.input {
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  padding-right: 38px;
  background-image: var(--chevron);
  background-repeat: no-repeat;
  background-position: right 13px center;
  background-size: 15px 15px;
}

.inline-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px 10px;
  margin-bottom: 10px;
}

.inline-row > label {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
}

.unit, .times, .hint-inline {
  font-size: 12.5px;
  color: var(--text-dim);
}

.hint-inline { font-weight: 650; }
.hint-inline.is-bad { color: var(--danger); }

.grid-2, .grid-3 {
  display: grid;
  gap: 14px;
  margin-bottom: 14px;
}

@media (min-width: 560px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

.field-inner { margin-bottom: 14px; }
.field-inner:last-child { margin-bottom: 0; }

/* 分段控件：内嵌凹槽 + 浮起的选中片 */
.segmented {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 3px;
  padding: 4px;
  margin-bottom: 12px;
  background: color-mix(in srgb, var(--surface-2) 88%, transparent);
  border: 1px solid var(--border);
  border-radius: 13px;
  box-shadow: inset 0 1px 2px rgba(9, 24, 21, 0.04);
}

.segmented-2 { max-width: 330px; }

.segmented label { display: block; }

.segmented input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 8px 6px;
  border-radius: 9px;
  font-size: 13px;
  font-weight: 650;
  color: var(--text-dim);
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.16s var(--ease), color 0.16s var(--ease),
    box-shadow 0.16s var(--ease);
}

.segmented span:hover { color: var(--text); }

.segmented input:checked + span {
  background: var(--seg-active-bg);
  color: var(--accent-strong);
  box-shadow: 0 1px 2px rgba(9, 24, 21, 0.08), 0 4px 12px -8px rgba(9, 24, 21, 0.3),
    inset 0 0 0 1px color-mix(in srgb, var(--accent) 18%, transparent);
}

.segmented input:disabled + span {
  opacity: 0.4;
  cursor: not-allowed;
}

/* 复选框 */
.check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 13.5px;
  cursor: pointer;
}

.check input {
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
  flex: none;
  accent-color: var(--accent);
  cursor: pointer;
}

/* 滑块：轨道用 --fill 画出真实进度（app.js 只写一个 CSS 变量） */
.slider-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 2px 0 4px;
}

.slider-row input[type="range"] {
  flex: 1;
  min-width: 0;
  height: 28px;
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  cursor: pointer;
}

.slider-row input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(
    90deg,
    var(--accent) 0 var(--fill, 40%),
    var(--surface-3) var(--fill, 40%) 100%
  );
  box-shadow: inset 0 1px 2px rgba(9, 24, 21, 0.12);
}

.slider-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  margin-top: -7px;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--accent) 55%, transparent);
  background: radial-gradient(circle at 32% 26%, #ffffff 0 40%, #e8f6f2 100%);
  box-shadow: 0 1px 3px rgba(9, 24, 21, 0.25),
    0 0 0 4px color-mix(in srgb, var(--accent) 14%, transparent);
  transition: transform 0.12s var(--ease), box-shadow 0.12s var(--ease);
}

.slider-row input[type="range"]:hover::-webkit-slider-thumb { transform: scale(1.07); }

.slider-row input[type="range"]:active::-webkit-slider-thumb {
  box-shadow: 0 1px 3px rgba(9, 24, 21, 0.28),
    0 0 0 7px color-mix(in srgb, var(--accent) 17%, transparent);
}

.slider-row input[type="range"]::-moz-range-track {
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(
    90deg,
    var(--accent) 0 var(--fill, 40%),
    var(--surface-3) var(--fill, 40%) 100%
  );
  box-shadow: inset 0 1px 2px rgba(9, 24, 21, 0.12);
}

.slider-row input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--accent) 55%, transparent);
  background: radial-gradient(circle at 32% 26%, #ffffff 0 40%, #e8f6f2 100%);
  box-shadow: 0 1px 3px rgba(9, 24, 21, 0.25),
    0 0 0 4px color-mix(in srgb, var(--accent) 14%, transparent);
}

.slider-value {
  min-width: 3.3em;
  padding: 2px 10px;
  text-align: center;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent-strong);
  background: color-mix(in srgb, var(--accent-soft) 85%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 16%, transparent);
  border-radius: 999px;
}

/* 折叠区 */
.details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface-2) 55%, transparent);
  padding: 0;
  overflow: hidden;
}

#namingDetails { margin-bottom: 22px; }

.details > summary {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 54px;
  padding: 15px 18px;
  list-style: none;
  cursor: pointer;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
  transition: background 0.15s var(--ease);
}

.details > summary:hover {
  background: color-mix(in srgb, var(--surface-2) 85%, transparent);
}

.details > summary::-webkit-details-marker { display: none; }

.details > summary::after {
  content: "";
  width: 8px;
  height: 8px;
  margin-left: auto;
  flex: none;
  border-right: 1.5px solid var(--text-faint);
  border-bottom: 1.5px solid var(--text-faint);
  transform: rotate(45deg);
  transition: transform 0.2s var(--ease);
}

.details[open] > summary {
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface-2) 65%, transparent);
}

.details[open] > summary::after { transform: rotate(-135deg); }

.details-body { padding: 18px; }

/* 提示文字 */
.hint {
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-dim);
}

.hint-warn { color: var(--warn); }

.hint code {
  padding: 1px 5px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text);
  background: color-mix(in srgb, var(--surface-3) 72%, transparent);
  border: 1px solid var(--border);
  border-radius: 5px;
}

.notice {
  margin-top: 14px;
  padding: 12px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  border: 1px solid transparent;
  border-radius: 12px;
}

.notice-warn {
  color: var(--warn);
  background: var(--warn-soft);
  border-color: color-mix(in srgb, var(--warn) 26%, transparent);
}

/* ------------------------------------------------------ 命名预览列表 -- */

.preview-list {
  display: flex;
  flex-direction: column;
  gap: 3px;
  max-height: 220px;
  padding: 10px;
  overflow-y: auto;
  font-family: var(--mono);
  font-size: 12px;
  background: color-mix(in srgb, var(--surface-2) 80%, transparent);
  border: 1px solid var(--border);
  border-radius: 12px;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}

.preview-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px;
  padding: 3px 2px;
  word-break: break-all;
}

.preview-old { color: var(--text-faint); }
.preview-arrow { flex: none; color: var(--text-faint); }
.preview-new { color: var(--text); font-weight: 650; }

.preview-flag {
  flex: none;
  padding: 1px 6px;
  font-family: var(--font);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.01em;
  border-radius: 5px;
}

.preview-flag.is-conflict { background: var(--danger-soft); color: var(--danger); }
.preview-flag.is-same { background: var(--surface-3); color: var(--text-faint); }

/* ---------------------------------------------------------- 操作与进度 -- */

.action-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
}

.progress {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 180px;
}

.progress-track {
  flex: 1;
  height: 6px;
  overflow: hidden;
  background: var(--surface-3);
  border-radius: 999px;
  box-shadow: inset 0 1px 2px rgba(9, 24, 21, 0.12);
}

.progress-fill {
  position: relative;
  width: 0;
  height: 100%;
  overflow: hidden;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-bright));
  transition: width 0.25s var(--ease);
}

.progress-text {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* ------------------------------------------------------------ 结果区 -- */

.summary-line {
  margin-bottom: 16px;
  font-size: 15px;
  font-weight: 650;
  letter-spacing: -0.012em;
}

.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 18px;
}

@media (min-width: 600px) {
  .stats { grid-template-columns: repeat(4, 1fr); }
}

.stat {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 16px;
  overflow: hidden;
  background:
    radial-gradient(120% 100% at 100% 0%, color-mix(in srgb, var(--accent) 7%, transparent), transparent 60%),
    color-mix(in srgb, var(--surface-2) 82%, transparent);
  border: 1px solid var(--border);
  border-radius: 15px;
}

.stat-value {
  font-size: 23px;
  font-weight: 750;
  letter-spacing: -0.035em;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.stat-label {
  font-size: 10.5px;
  font-weight: 650;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* 「省下体积」是这页的主角，给它一点品牌色 */
.stat:nth-child(2) {
  background:
    radial-gradient(130% 110% at 100% 0%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 62%),
    color-mix(in srgb, var(--accent-soft) 55%, var(--surface));
  border-color: color-mix(in srgb, var(--accent) 24%, var(--border));
}

.stat:nth-child(2) .stat-value { color: var(--accent-strong); }

.result-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.result-row {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  grid-template-areas:
    "thumb meta action"
    "thumb size action";
  gap: 3px 14px;
  align-items: center;
  padding: 11px 13px;
  background: color-mix(in srgb, var(--surface) 96%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.16s var(--ease), box-shadow 0.18s var(--ease),
    background 0.16s var(--ease);
}

.result-row:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}

.result-row.is-failed {
  background: color-mix(in srgb, var(--danger-soft) 55%, var(--surface));
  border-color: color-mix(in srgb, var(--danger) 26%, transparent);
}

.thumb {
  grid-area: thumb;
  width: 56px;
  height: 56px;
  object-fit: cover;
  border-radius: 12px;
  background: var(--surface-3) center / cover no-repeat;
  box-shadow: inset 0 0 0 1px rgba(9, 24, 21, 0.07);
}

.thumb-empty {
  display: grid;
  place-items: center;
  font-size: 20px;
  color: var(--text-faint);
}

.result-meta { grid-area: meta; min-width: 0; }

.result-name {
  font-size: 13.5px;
  font-weight: 650;
  line-height: 1.35;
  word-break: break-all;
}

.result-sub {
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--text-dim);
  word-break: break-all;
}

.result-size {
  grid-area: size;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.size-now { font-weight: 700; }
.size-was { color: var(--text-faint); text-decoration: line-through; }

.size-delta {
  padding: 1px 7px;
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-strong);
  background: color-mix(in srgb, var(--accent-soft) 85%, transparent);
  border-radius: 999px;
}

.size-delta.is-bad {
  color: var(--danger);
  background: var(--danger-soft);
}

.result-action { grid-area: action; }

.result-flag {
  display: inline-block;
  margin-right: 5px;
  padding: 1px 7px;
  font-size: 10.5px;
  font-weight: 650;
  border-radius: 5px;
  background: var(--surface-3);
  color: var(--text-dim);
}

.result-flag.is-note { background: var(--warn-soft); color: var(--warn); }
.result-flag.is-error { background: var(--danger-soft); color: var(--danger); }

/* 窄屏把操作按钮挪到单独一行，给文件名让出宽度 */
@media (max-width: 520px) {
  .result-row {
    grid-template-columns: 48px 1fr;
    grid-template-areas:
      "thumb meta"
      "thumb size"
      "action action";
    row-gap: 8px;
    padding: 11px;
  }

  .thumb { width: 48px; height: 48px; border-radius: 10px; }
  .result-action { justify-self: start; }
}

/* ---------------------------------------------------------------- 页脚 -- */

.app-footer {
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 22px 4px 10px;
  font-size: 12px;
  line-height: 1.65;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
}

.footer-mark {
  width: 14px;
  height: 14px;
  flex: none;
  border-radius: 4px;
  background: linear-gradient(145deg, var(--accent), var(--accent-bright));
  box-shadow: 0 2px 6px -2px var(--accent-glow);
}

.app-footer strong { color: var(--text); }

.footer-sub {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
  color: var(--text-faint);
}

.footer-dot { opacity: 0.6; }

/* ------------------------------------------------------------ 无障碍 -- */

.btn:focus-visible,
.btn-tiny:focus-visible,
.input:focus-visible,
.segmented input:focus-visible + span,
.check input:focus-visible,
.details > summary:focus-visible,
.slider-row input[type="range"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.slider-row input[type="range"]:focus-visible { outline-offset: 4px; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ------------------------------------------------------------ 动效 -- */

@media (prefers-reduced-motion: no-preference) {
  @keyframes rise {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
  }

  @keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
  }

  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
  }

  @keyframes shimmer {
    from { transform: translateX(-100%); }
    to { transform: translateX(100%); }
  }

  .hero { animation: rise 0.55s var(--ease) both; }
  .steps { animation: rise 0.55s var(--ease) 0.06s both; }
  .card:not(.dropzone) { animation: rise 0.5s var(--ease) both; }
  .dropzone { animation: fade-in 0.55s var(--ease) 0.08s both; }
  .result-row { animation: rise 0.4s var(--ease) both; }

  .dropzone-icon { animation: float 6.5s ease-in-out 0.6s infinite; }

  .progress-fill::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.42), transparent);
    animation: shimmer 1.5s linear infinite;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* ------------------------------------------------------------ 响应式 -- */

@media (max-width: 560px) {
  .app-header {
    padding-top: 12px;
    padding-bottom: 12px;
    row-gap: 10px;
  }

  .privacy-badge {
    flex-basis: 100%;
    justify-content: center;
    font-size: 11.5px;
    padding: 6px 12px;
  }

  .hero { padding-top: 20px; }

  .hero-title { font-size: clamp(25px, 8.2vw, 32px); }

  .hero-sub { font-size: 13.5px; }

  .hero-chip { font-size: 11.5px; padding: 5px 10px; }

  .steps { grid-template-columns: 1fr 1fr auto; gap: 6px; }

  .step { font-size: 11px; gap: 8px; }

  .step-num { width: 27px; height: 27px; font-size: 9.5px; }

  .step:not(:last-child)::after { margin-left: 2px; }

  .card { border-radius: 19px; }

  .dropzone-title { font-size: 18.5px; }

  .dropzone-icon { width: 68px; height: 68px; border-radius: 21px; }

  .dropzone-actions { width: 100%; }

  .dropzone-actions .btn { flex: 1 1 auto; }

  .action-bar { gap: 10px; }

  .action-bar .btn-lg { flex: 1 1 100%; }

  .progress { flex-basis: 100%; }

  .stat { padding: 12px 13px; }

  .stat-value { font-size: 20px; }

  .card-head-actions .btn { min-height: 36px; padding: 7px 12px; font-size: 12.5px; }
}

@media (max-width: 380px) {
  .step-label { display: none; }
  .step:not(:last-child)::after { margin-left: 0; }
  .hero-chips { gap: 6px; }
  .hero-chip svg { display: none; }
}

/* ---------------------------------------------------------------- 打印 -- */

@media print {
  body {
    background: #fff;
    color: #000;
  }

  body::before,
  body::after,
  .app-header,
  .hero,
  .steps,
  .dropzone,
  .action-bar,
  .card-head-actions,
  .result-action,
  .app-footer {
    display: none !important;
  }

  main { max-width: none; padding: 0; }

  .card {
    box-shadow: none;
    border-color: #ccc;
    background: #fff;
    break-inside: avoid;
    animation: none;
  }

  .result-row { break-inside: avoid; }

  .stat { background: #f5f5f5; }
}