@font-face{
  font-family: "IPix";
  src: url("assets/IPix.ttf") format("truetype");
  font-display: block;
}

:root{
  --bg:#000;
  --fg:#fff;
  --log: rgba(255,255,255,.78);
  --muted2: rgba(255,255,255,.35);
}

*{ box-sizing:border-box; }
html,body{ height:100%; }

body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font-family: IPix, ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  -webkit-font-smoothing: none;
  -moz-osx-font-smoothing: grayscale;
  overflow:hidden;
}

.app{ height:100%; width:100%; position:relative; }

.screen{
  position:absolute;
  inset:0;
  display:none;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}


.screen-active{ display:block; }
.screen[data-screen="title"]{
  position:relative; /* 关键：给 IN 一个参照物 */
}

.log{
  margin:0;
  font-size:12px;
  line-height:1.35;
  color:var(--log);
  white-space:pre-wrap;
  font-family:IPix,ui-monospace,monospace;
}

/* ===== Screen 1: Scan ===== */
/* 竖向五分之二：top = 40vh，且强制水平居中 */
.center{
  position:absolute;
  top:35vh;
  left:0;
  right:0;
  text-align:center;
}

.scan-title{
  display:inline-block;
  font-size:20px;
  letter-spacing:1px;
  white-space:nowrap;
}

/* Bottom-left log */
.log-panel{
  position:absolute;
  left:18px;
  bottom:26px;
  width:min(92vw, 360px);
  max-height:36vh;
  overflow:hidden;
}

/* ===== Screen 2: Title ===== */
/* 舞台整体放在 3/7 高度 */
.title-stage{
  position:absolute;
  top:42.857vh;          /* 3/7 */
  left:0;
  right:0;
  transform: translateY(-50%);
  display:flex;
  align-items:center;
  justify-content:center;
}

/* logo 居中偏淡 */
.title-logo{
  width:min(62vw, 340px);
  opacity:.28;
  image-rendering: pixelated;
  filter: blur(.2px);
}

/* title 叠在 logo 上层 */
.title-text{
  position:absolute;
  left:50%;
  top:55%;
  transform: translate(-43%, -50%);
  width:min(88vw, 760px);
  image-rendering: pixelated;

  opacity:0;
  filter: blur(1.6px);
}

/* 渐显：只在 title 屏激活时播放 */
.screen-active[data-screen="title"] .title-text{
  animation: titleFade 1.35s ease forwards;
  animation-delay: .22s;
}

@keyframes titleFade{
  0%   { opacity:0; filter: blur(1.6px); }
  60%  { opacity:.92; filter: blur(.55px); }
  100% { opacity:1; filter: blur(0px); }
}

/* 底部 IN：强制 IPix 字体 */
/* ===== Command cursor instead of IN button ===== */

.cmd-line{
  position:fixed;                 /* 用 fixed：相对屏幕，不受父容器影响 */
  left:50%;
  bottom:calc(18vh + env(safe-area-inset-bottom));
  transform:translateX(-50%);     /* 真正居中 */

  z-index:9999;                   /* 关键：永远在最上层 */
  pointer-events:auto;

  font-family: IPix, monospace;
  font-size:18px;
  letter-spacing:2px;
  color:#fff;

  cursor:pointer;
  user-select:none;
}


.cmd-text{
  margin-right:2px;
}

/* blinking cursor */
.cursor{
  display:inline-block;
  width:10px;
  animation: blink 1.05s steps(1) infinite;
}

/* 光标闪烁动画 */
@keyframes blink{
  0%   { opacity:1; }
  49%  { opacity:1; }
  50%  { opacity:0; }
  100% { opacity:0; }
}


.btn-in:active{ transform: scale(.98); }

.tri{ margin-right:6px; }

/* Mobile tap highlight off */
button{ -webkit-tap-highlight-color: transparent; }
/* ===== Intro Voice Screen ===== */
.screen[data-screen="intro"]{
  position:relative;
  background:#000;
}

/* 全屏容器 */
.intro-wrap{
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  padding: 24px;
}

/* 锁触屏：朗诵结束前禁止点击 */
.intro-wrap.locked{
  pointer-events:none;
}

/* 字幕：默认隐藏 */
.intro-sub{
  opacity:0;
  transform: translateY(6px);
  transition: opacity .35s ease, transform .35s ease;
  max-width: min(86vw, 520px);
}

/* 字幕出现 */
.intro-sub.on{
  opacity:1;
  transform: translateY(0);
}

.intro-sub-title{
  font-size:18px;
  letter-spacing:2px;
  margin-bottom:14px;
}

.intro-sub-body{
  font-size:12px;
  line-height:1.85;
  opacity:.85;
  white-space:pre-wrap;
}

/* 结束后提示：默认隐藏 */
.intro-hint{
  position:absolute;
  left:0;
  right:0;
  bottom: calc(16vh + env(safe-area-inset-bottom));
  margin:auto;
  font-size:12px;
  opacity:0;
  transition: opacity .35s ease;
  pointer-events:none;
}

.intro-hint.on{
  opacity:.55;
}

/* ===== Intro Voice Screen (updated) ===== */
.screen[data-screen="intro"]{
  position:relative;
  background:#000;
  overflow:hidden;
}

/* 全屏容器：不再用 flex 居中字幕（我们用绝对定位到 3/7） */
.intro-wrap{
  position:absolute;
  inset:0;
  padding: 24px;
}

/* 锁触屏：朗诵结束前禁止点击 */
.intro-wrap.locked{
  pointer-events:none;
}

/* ——“漫长黑屏”解决：极弱噪声层（不是字幕）—— */
.intro-noise{
  position:absolute;
  inset:-30%;
  opacity:.10;                 /* 很弱 */
  pointer-events:none;
  background:
    repeating-linear-gradient(
      180deg,
      rgba(255,255,255,.02),
      rgba(255,255,255,.02) 1px,
      rgba(0,0,0,0) 2px,
      rgba(0,0,0,0) 6px
    );
  animation: noiseDrift 3.6s linear infinite;
}

@keyframes noiseDrift{
  0%   { transform: translateY(0); }
  100% { transform: translateY(120px); }
}

/* 字幕容器：定位在 3/7 高度、水平居中 */
.intro-sub{
  position:absolute;
  left:50%;
  top:42.857vh;                /* 3/7 */
  transform: translate(-50%, -50%);

  max-width: min(86vw, 520px);
  text-align:center;

  opacity:0;
  pointer-events:none;
}

/* 字幕出现：先用 glitch 动画“瞬显抖动” */
.intro-sub.on{
  opacity:1;
  animation: introGlitchIn .55s steps(1) both;
}

@keyframes introGlitchIn{
  0%   { opacity:0; transform: translate(-50%, -50%) translateY(6px); }
  10%  { opacity:1; transform: translate(-50%, -50%) translateX(-2px); }
  18%  { opacity:.25; transform: translate(-50%, -50%) translateX(3px); }
  28%  { opacity:1; transform: translate(-50%, -50%) translateX(-4px); }
  42%  { opacity:.75; transform: translate(-50%, -50%) translateX(2px); }
  60%  { opacity:1; transform: translate(-50%, -50%); }
  100% { opacity:1; transform: translate(-50%, -50%); }
}

.intro-sub-title{
  font-size:18px;
  letter-spacing:2px;
  margin-bottom:14px;
}

.intro-sub-body{
  font-size:12px;
  line-height:1.85;
  opacity:.88;
  white-space:pre-wrap;
}

/* 结束后提示：默认隐藏 */
.intro-hint{
  position:absolute;
  left:0;
  right:0;
  bottom: calc(16vh + env(safe-area-inset-bottom));
  margin:auto;
  font-size:12px;
  opacity:0;
  transition: opacity .35s ease;
  pointer-events:none;
  text-align:center;
}

.intro-hint.on{
  opacity:.55;
}
/* ===== FIX: make '自复制' title always visible & above noise ===== */
.intro-noise{ z-index: 1; }

#introSub{
  z-index: 2;                  /* 字幕层压过噪声 */
}

#introSub .intro-sub-title{
  opacity: 1 !important;       /* 强制显示标题 */
  visibility: visible !important;
}
/* Intro video must be the bottom layer of this screen */
.screen[data-screen="intro"]{
  position:relative;
  background:#000;
}

.intro-video{
  position:fixed;     /* 相对屏幕，避免被父元素影响 */
  left:0;
  top:0;
  width:100vw;
  height:100vh;

  display:block;
  object-fit:cover;
  background:#000;

  z-index:1;          /* 明确层级 */
}

.intro-hint{
  position:fixed;
  left:0;
  right:0;
  bottom:18vh;
  text-align:center;

  z-index:2;          /* 提示在视频上面 */
  opacity:0;
  transition:opacity .4s ease;
  pointer-events:none;
}
.intro-hint.on{ opacity:.6; }
/* =========================================================
   Screen 6: Explain (左文 + 中间绿色提示视频 + 右留白)
   ========================================================= */
.screen[data-screen="status"]{
  position:relative;
  background:#000;
}

.explain{
  position:absolute;
  inset:0;
  display:flex;
}

.explain-left{
  width:34%;
  min-width: 220px;
  padding: 42px 18px 18px 18px;
  color:#fff;
}

.explain-title{
  font-size:16px;
  margin-bottom:14px;
  letter-spacing:2px;
}

.explain-body{
  font-size:12px;
  line-height:1.8;
  opacity:.9;
}

.explain-note{
  position:absolute;
  left:18px;
  bottom:18vh;
  font-size:10px;
  opacity:.5;
}

.explain-mid{
  width:32%;
  background:#8DB08E; /* 你图里那种绿色 */
  position:relative;
  overflow:hidden;
}

.hint-video{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  filter: grayscale(1) contrast(1.1);
  opacity:.9;
}

.hint-caption{
  position:absolute;
  left:12px;
  bottom:12px;
  font-size:10px;
  color:rgba(0,0,0,.55);
}

.explain-right{
  flex:1;
  background:#000;
}

.explain-next{
  position:fixed;
  left:50%;
  bottom: calc(10vh + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  text-align:center;
  font-size:12px;
  letter-spacing:1px;
  opacity:.85;
  cursor:pointer;
  user-select:none;
}

/* =========================================================
   Screen 7: Camera
   ========================================================= */
.screen[data-screen="camera"]{
  position:relative;
  background:#000;
}

.cam-wrap{
  position:absolute;
  inset:0;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:18px;
  padding: 24px 18px;
}

.cam-frame{
  width:min(86vw, 380px);
  aspect-ratio: 3/4;
  border: 2px solid rgba(255,255,255,.35);
  position:relative;
  overflow:hidden;
  background:#111;
}

.cam-video{
  width:100%;
  height:100%;
  object-fit:cover;
  filter: grayscale(1) contrast(1.1) brightness(.9);
  transform: scale(1.06); /* 稍微裁切，更像“系统视角” */
}

.cam-label{
  position:absolute;
  left:12px;
  bottom:12px;
  font-size:10px;
  color:rgba(255,255,255,.55);
  text-shadow: 0 1px 0 rgba(0,0,0,.35);
}

.cam-btn{
  width:min(86vw, 380px);
  padding:14px 16px;
  background:#000;
  border: 2px solid rgba(255,255,255,.35);
  color:#fff;
  font-family:IPix, monospace;
  font-size:14px;
  letter-spacing:2px;
}

.cam-btn .sub{
  display:block;
  font-size:10px;
  opacity:.6;
  margin-top:6px;
  letter-spacing:1px;
}

.cam-btn:active{ transform: scale(.99); }

.cam-foot{
  font-size:10px;
  opacity:.45;
  letter-spacing:1px;
}

/* =========================================================
   Screen 8: Loading (闪屏 + 卡顿感)
   ========================================================= */
.screen[data-screen="loading"]{
  position:relative;
  background:#000;
  overflow:hidden;
}

.loading-wrap{
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
}

.loading-noise{
  position:absolute;
  inset:-30%;
  opacity:.12;
  pointer-events:none;
  background:
    repeating-linear-gradient(
      180deg,
      rgba(255,255,255,.02),
      rgba(255,255,255,.02) 1px,
      rgba(0,0,0,0) 2px,
      rgba(0,0,0,0) 7px
    );
  animation: noiseDrift 1.9s steps(2) infinite;
}

@keyframes noiseDrift{
  0%{ transform: translateY(0); }
  100%{ transform: translateY(120px); }
}

.loading-text{
  position:relative;
  font-size:12px;
  letter-spacing:2px;
  opacity:.85;
  animation: flicker 0.12s steps(1) infinite;
}

/* 轻微“卡顿/闪屏” */
@keyframes flicker{
  0%{ opacity:.85; transform: translateX(0); }
  20%{ opacity:.35; transform: translateX(-1px); }
  40%{ opacity:.85; transform: translateX(2px); }
  60%{ opacity:.55; transform: translateX(-2px); }
  80%{ opacity:.9;  transform: translateX(1px); }
  100%{ opacity:.85; transform: translateX(0); }
}