/* ==========================================================================
   DocuVault Scanner — app UI
   ========================================================================== */

:root{
  --ink:#1d1d1f;
  --ink-2:#3a3a3d;
  --grey-1:#5c5c61;
  --grey-2:#86868b;
  --grey-3:#a1a1a6;
  --line:#e2e2e6;
  --line-2:#ededf0;
  --bg:#ffffff;
  --bg-2:#f5f5f7;
  --bg-3:#ebebee;
  --dark:#121214;

  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;

  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.16,1,.3,1);

  --safe-t:env(safe-area-inset-top,0px);
  --safe-b:env(safe-area-inset-bottom,0px);
  --tabbar-h:64px;

  --font:'Inter','Roboto',-apple-system,BlinkMacSystemFont,system-ui,'Helvetica Neue',sans-serif;
}

*,*::before,*::after{box-sizing:border-box;-webkit-tap-highlight-color:transparent}

html,body{height:100%;overflow:hidden}
body{
  margin:0;
  font-family:var(--font);
  font-weight:300;
  color:var(--ink);
  background:var(--bg);
  letter-spacing:-.01em;
  -webkit-font-smoothing:antialiased;
  overscroll-behavior:none;
}
button,input,select{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
h1,h2,h3{margin:0;font-weight:250;letter-spacing:-.03em}
svg{display:block}

/* ---------- screens ---------- */
.screen{
  position:fixed;inset:0;
  display:flex;flex-direction:column;
  background:var(--bg);
  opacity:0;visibility:hidden;
  transform:translateX(14px);
  transition:opacity .32s var(--ease),transform .36s var(--ease-out),visibility .32s;
}
.screen.is-active{opacity:1;visibility:visible;transform:none}

.scroll{
  flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;
  padding:0 18px calc(var(--tabbar-h) + var(--safe-b) + 24px);
}
.screen--doc .scroll,.screen--settings .scroll{padding-bottom:calc(var(--safe-b) + 32px)}

/* ---------- top bar ---------- */
.bar{
  padding:calc(var(--safe-t) + 14px) 18px 12px;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid transparent;
  transition:border-color .3s var(--ease);
}
.bar.is-scrolled{border-bottom-color:var(--line-2)}
.bar__row{display:flex;align-items:center;justify-content:space-between;gap:12px}
.bar h1{font-size:30px;font-weight:200}
.bar--compact{padding-top:calc(var(--safe-t) + 10px);padding-bottom:10px;border-bottom:1px solid var(--line-2)}
.bar--compact h2{font-size:17px;font-weight:400;letter-spacing:-.01em}
.bar--compact .bar__row{justify-content:space-between}

.icon-btn{
  width:38px;height:38px;flex:none;
  display:grid;place-items:center;border-radius:50%;
  color:var(--ink);
  transition:background .25s var(--ease),transform .3s var(--ease-out);
}
.icon-btn svg{width:22px;height:22px}
.icon-btn:active{background:var(--bg-3);transform:scale(.94)}
.icon-btn--light{color:#fff;background:rgba(20,20,22,.42);backdrop-filter:blur(10px)}
.icon-btn--light:active{background:rgba(20,20,22,.6)}

/* ---------- search ---------- */
.search{
  margin-top:14px;
  display:flex;align-items:center;gap:9px;
  padding:0 14px;height:40px;
  background:var(--bg-2);border-radius:12px;
  color:var(--grey-2);
}
.search svg{width:17px;height:17px;flex:none}
.search input{
  flex:1;min-width:0;height:100%;
  border:0;background:none;outline:none;
  font-size:15px;color:var(--ink);
}
.search input::placeholder{color:var(--grey-3)}

/* ---------- document list ---------- */
.list-label{
  margin:22px 0 10px;
  font-size:11px;font-weight:500;letter-spacing:.13em;text-transform:uppercase;
  color:var(--grey-3);
}
.doc-list{display:flex;flex-direction:column}
.doc-row{
  display:flex;align-items:center;gap:14px;
  padding:12px 0;border-bottom:1px solid var(--line-2);
  text-align:left;width:100%;
  transition:opacity .25s var(--ease);
}
.doc-row:active{opacity:.55}
.doc-row__thumb{
  width:46px;height:60px;flex:none;
  border-radius:6px;overflow:hidden;
  background:var(--bg-2);border:1px solid var(--line);
}
.doc-row__thumb img{width:100%;height:100%;object-fit:cover;object-position:top center}
.doc-row__txt{flex:1;min-width:0;display:flex;flex-direction:column;gap:4px}
.doc-row__txt b{font-weight:400;font-size:16px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.doc-row__txt span{font-size:12.5px;color:var(--grey-2)}
.doc-row__chev{width:16px;height:16px;color:var(--grey-3);flex:none}

/* ---------- empty ---------- */
.empty{display:none;flex-direction:column;align-items:center;text-align:center;padding:8vh 10px 0}
.empty.is-visible{display:flex}
.empty__art{width:76px;height:76px;color:var(--grey-3);margin-bottom:26px}
.empty__art svg{width:100%;height:100%}
.empty h2{font-size:22px;margin-bottom:12px}
.empty p{margin:0 0 30px;font-size:14.5px;line-height:1.6;color:var(--grey-2);max-width:32ch}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:48px;padding:0 26px;border-radius:999px;
  font-size:15.5px;font-weight:400;
  border:1px solid transparent;
  transition:transform .3s var(--ease-out),background .25s var(--ease),opacity .25s;
}
.btn--dark{background:var(--ink);color:#fff}
.btn--ghost{border-color:var(--line);color:var(--ink)}
.btn--block{width:100%}
.btn:active{transform:scale(.975)}
.btn:disabled{opacity:.4;pointer-events:none}

/* ---------- tab bar ---------- */
.tabbar{
  position:relative;z-index:2;
  height:calc(var(--tabbar-h) + var(--safe-b));
  padding-bottom:var(--safe-b);
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  background:rgba(255,255,255,.9);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-top:1px solid var(--line-2);
}
.tab{
  display:flex;flex-direction:column;align-items:center;gap:5px;
  color:var(--grey-3);font-size:10.5px;letter-spacing:.02em;
  transition:color .25s var(--ease);
}
.tab svg{width:23px;height:23px}
.tab.is-active{color:var(--ink)}
.tab--main{padding:0 22px}
.tab__shutter{
  width:54px;height:54px;margin-top:-14px;
  display:grid;place-items:center;border-radius:50%;
  background:var(--ink);color:#fff;
  box-shadow:0 12px 26px -12px rgba(0,0,0,.6);
  transition:transform .32s var(--ease-out);
}
.tab__shutter svg{width:25px;height:25px}
.tab--main:active .tab__shutter{transform:scale(.93)}

/* ---------- camera ---------- */
.screen--camera{background:#0c0c0d}
.cam{position:relative;flex:1;overflow:hidden}
.cam video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;background:#0c0c0d}
.cam__frame{position:absolute;inset:12% 8%;pointer-events:none}
.cam__frame i{
  position:absolute;width:34px;height:34px;
  border:1.5px solid rgba(255,255,255,.9);
}
.cam__frame i:nth-child(1){top:0;left:0;border-right:0;border-bottom:0;border-top-left-radius:8px}
.cam__frame i:nth-child(2){top:0;right:0;border-left:0;border-bottom:0;border-top-right-radius:8px}
.cam__frame i:nth-child(3){bottom:0;left:0;border-right:0;border-top:0;border-bottom-left-radius:8px}
.cam__frame i:nth-child(4){bottom:0;right:0;border-left:0;border-top:0;border-bottom-right-radius:8px}
.cam__hint{
  position:absolute;left:50%;top:6%;transform:translateX(-50%);
  margin:0;padding:7px 15px;border-radius:999px;
  background:rgba(20,20,22,.5);backdrop-filter:blur(10px);
  color:#fff;font-size:12.5px;white-space:nowrap;
  transition:opacity .4s var(--ease);
}
.cam__top{
  position:absolute;top:0;left:0;right:0;
  padding:calc(var(--safe-t) + 12px) 16px 0;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.cam__mode{color:rgba(255,255,255,.82);font-size:12.5px;letter-spacing:.02em}
.cam__bottom{
  position:absolute;bottom:0;left:0;right:0;
  padding:0 26px calc(var(--safe-b) + 26px);
  display:flex;align-items:center;justify-content:space-between;
}
.shutter{
  width:74px;height:74px;border-radius:50%;
  border:2px solid rgba(255,255,255,.9);
  display:grid;place-items:center;
  transition:transform .25s var(--ease-out);
}
.shutter span{width:60px;height:60px;border-radius:50%;background:#fff;display:block;transition:transform .2s var(--ease)}
.shutter:active span{transform:scale(.88)}
.cam__count{
  min-width:38px;text-align:right;
  color:#fff;font-size:12.5px;
}
/* no live preview available: the system camera app takes the shot */
.screen--camera.is-fallback .cam{background:#17171a}
.screen--camera.is-fallback .cam video{display:none}
.screen--camera.is-fallback #btnFlip{visibility:hidden}

.cam__flash{position:absolute;inset:0;background:#fff;opacity:0;pointer-events:none}
.cam__flash.is-on{animation:flash .32s var(--ease)}
@keyframes flash{0%{opacity:.9}100%{opacity:0}}

/* ---------- review ---------- */
.preview{
  flex:1;position:relative;
  display:flex;align-items:center;justify-content:center;
  padding:16px;background:var(--bg-2);
  min-height:0;
}
.preview canvas{
  max-width:100%;max-height:100%;
  border-radius:4px;
  box-shadow:0 24px 44px -26px rgba(0,0,0,.45),0 0 0 1px rgba(0,0,0,.05);
  background:#fff;
}
.preview__busy{
  position:absolute;inset:0;display:none;place-items:center;
  background:rgba(245,245,247,.6);backdrop-filter:blur(2px);
}
.preview__busy.is-on{display:grid}
.preview__busy span{
  width:24px;height:24px;border-radius:50%;
  border:1.5px solid var(--line);border-top-color:var(--ink);
  animation:spin .8s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

.panel{
  padding:16px 18px calc(var(--safe-b) + 16px);
  background:var(--bg);border-top:1px solid var(--line-2);
}
.chips{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;margin-bottom:14px}
.chips::-webkit-scrollbar{display:none}
.chip{
  flex:none;padding:8px 15px;border-radius:999px;
  border:1px solid var(--line);background:var(--bg);
  font-size:13px;color:var(--grey-1);white-space:nowrap;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.chip.is-active{background:var(--ink);border-color:var(--ink);color:#fff}

.slider-row{display:grid;grid-template-columns:74px 1fr 30px;align-items:center;gap:12px;margin-bottom:10px}
.slider-row label{font-size:13px;color:var(--grey-1)}
.slider-row output{font-size:12px;color:var(--grey-3);text-align:right;font-variant-numeric:tabular-nums}

input[type=range]{
  -webkit-appearance:none;appearance:none;
  height:22px;background:none;width:100%;
}
input[type=range]::-webkit-slider-runnable-track{height:2px;background:var(--line);border-radius:2px}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;appearance:none;
  width:20px;height:20px;margin-top:-9px;border-radius:50%;
  background:#fff;border:1px solid var(--line);
  box-shadow:0 2px 6px rgba(0,0,0,.18);
}
input[type=range]::-moz-range-track{height:2px;background:var(--line)}
input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:#fff;border:1px solid var(--line)}

.switch-row{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  margin-top:14px;padding-top:13px;border-top:1px solid var(--line-2);
  font-size:13px;color:var(--grey-1);
}
.switch-row input{position:absolute;opacity:0;pointer-events:none}
.switch{
  width:42px;height:25px;flex:none;border-radius:999px;
  background:var(--bg-3);position:relative;
  transition:background .3s var(--ease);
}
.switch::after{
  content:'';position:absolute;top:2.5px;left:2.5px;
  width:20px;height:20px;border-radius:50%;background:#fff;
  box-shadow:0 1px 4px rgba(0,0,0,.25);
  transition:transform .3s var(--ease-out);
}
.switch-row input:checked + .switch{background:var(--ink)}
.switch-row input:checked + .switch::after{transform:translateX(17px)}

.panel__actions{display:flex;gap:8px;margin-top:16px}
.panel__actions .btn{flex:1;padding:0 12px;font-size:14.5px}
.panel__actions .btn--dark{flex:1.2}

/* ---------- document ---------- */
.doc-meta{padding:20px 0 6px}
.doc-name{
  width:100%;border:0;outline:none;background:none;
  font-size:24px;font-weight:250;letter-spacing:-.03em;color:var(--ink);
  padding:0 0 6px;border-bottom:1px solid transparent;
  transition:border-color .25s var(--ease);
}
.doc-name:focus{border-bottom-color:var(--line)}
.doc-meta p{margin:0;font-size:13px;color:var(--grey-2)}

.pages{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:20px}
.page-card{
  position:relative;border-radius:var(--r-sm);overflow:hidden;
  background:var(--bg-2);border:1px solid var(--line);
  aspect-ratio:3/4;
}
.page-card img{width:100%;height:100%;object-fit:cover;object-position:top center}
.page-card__n{
  position:absolute;bottom:6px;left:6px;
  padding:3px 8px;border-radius:999px;
  background:rgba(255,255,255,.9);font-size:10.5px;color:var(--grey-1);
}
.page-card__del{
  position:absolute;top:6px;right:6px;
  width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;
  background:rgba(20,20,22,.55);color:#fff;
}
.page-card__del svg{width:13px;height:13px}

.doc-actions{display:flex;flex-direction:column;gap:10px;margin:26px 0 10px}

/* ---------- settings ---------- */
.rows{border-top:1px solid var(--line-2)}
.row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 0;border-bottom:1px solid var(--line-2);
  font-size:15px;
}
.row span{color:var(--ink);flex:none}
.row em{font-style:normal;color:var(--grey-2);font-size:14px}
.row select{
  border:0;background:none;outline:none;
  font-size:14.5px;color:var(--grey-1);text-align:right;
  appearance:none;-webkit-appearance:none;
}
.row input[type=range]{max-width:170px}
.fine{margin:20px 0 0;font-size:12px;line-height:1.6;color:var(--grey-3)}

/* ---------- toast ---------- */
.toast{
  position:fixed;left:16px;right:16px;bottom:calc(var(--tabbar-h) + var(--safe-b) + 16px);
  z-index:50;
  padding:13px 18px;border-radius:14px;
  background:var(--ink);color:#fff;font-size:13.5px;line-height:1.4;
  box-shadow:0 20px 40px -20px rgba(0,0,0,.7);
  transform:translateY(140%);opacity:0;
  transition:transform .45s var(--ease-out),opacity .3s;
}
.toast.is-visible{transform:none;opacity:1}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
}