:root{
  --bg:#0A0A0C;
  --bg-2:#050506;
  --panel:#141519;
  --panel-2:#1B1D22;
  --border:#2A2D33;
  --border-soft:#232529;
  --text:#F2EFEA;
  --text-dim:#83868C;
  --red:#FF3B3F;
  --red-dim:#8C2224;
  --amber:#F5A623;
  --cyan:#35D6CE;
  --white-ink:#F7F5F0;
  --card-paper:#111214;
  --paper-light:#EFECE4;
  --radius:10px;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", sans-serif;
}

:root[data-theme="light"]{
  --bg:#E7E4DC;
  --bg-2:#DEDACF;
  --panel:#FBFAF7;
  --panel-2:#F2EFE8;
  --border:#D2CDBF;
  --border-soft:#DAD5C8;
  --text:#16171A;
  --text-dim:#6B6E72;
  --card-paper:#FFFFFF;
  --paper-light:#FFFFFF;
}

*{box-sizing:border-box; -webkit-tap-highlight-color:transparent;}
html,body{height:100%;}
body{
  margin:0;
  background:
    radial-gradient(ellipse 120% 80% at 50% -10%, rgba(255,59,63,0.08), transparent 60%),
    radial-gradient(ellipse 100% 60% at 50% 110%, rgba(53,214,206,0.05), transparent 60%),
    var(--bg);
  color:var(--text);
  font-family:var(--sans);
  overflow:hidden;
  overscroll-behavior:none;
  user-select:none;
}

.hidden{display:none !important;}

/* ---------- App shell ---------- */
.app{
  height:100dvh;
  display:flex;
  flex-direction:column;
}

/* ---------- Top bar ---------- */
.topbar{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  padding: max(10px, env(safe-area-inset-top)) 14px 10px;
  background:linear-gradient(180deg, var(--panel), var(--panel) 70%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border-soft);
  flex:0 0 auto;
}
.topbar::after{
  content:"";
  position:absolute;
  left:0; right:0; bottom:-1px;
  height:2px;
  background:linear-gradient(90deg, transparent, var(--red), transparent);
  opacity:.55;
}
.pagecounter{
  font-family:var(--mono);
  font-size:13px;
  font-weight:600;
  letter-spacing:0.14em;
  color:var(--text-dim);
  min-width:74px;
}
.pagecounter::before{
  content:"● ";
  color:var(--red);
  letter-spacing:0;
}
.topbar-actions{
  margin-left:auto;
  display:flex;
  gap:6px;
}
.icon-btn{
  appearance:none;
  border:1px solid var(--border);
  background:var(--panel-2);
  color:var(--text);
  width:40px;
  height:40px;
  border-radius:8px;
  font-size:17px;
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:border-color .15s ease, box-shadow .15s ease, background .15s ease, transform .1s ease;
}
.icon-btn:active{ transform:scale(0.93); }
.icon-btn.active{
  background:var(--red);
  border-color:var(--red);
  color:#fff;
  box-shadow:0 0 0 1px var(--red), 0 0 16px rgba(255,59,63,0.5);
}
.edit-label{display:none;}

/* ---------- Stage / card ---------- */
.stage{
  position:relative;
  flex:1 1 auto;
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:18px;
  background:
    repeating-linear-gradient(180deg, rgba(255,255,255,0.012) 0px, rgba(255,255,255,0.012) 1px, transparent 1px, transparent 3px);
}
.card-wrap{
  position:relative;
  width:100%;
  height:100%;
  max-width:1100px;
  perspective:1400px;
}
.card{
  position:absolute;
  inset:0;
  background:var(--paper-light);
  border:1px solid rgba(0,0,0,0.08);
  border-radius:var(--radius);
  padding:38px 44px;
  display:flex;
  flex-direction:column;
  overflow-y:auto;
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.03),
    0 30px 70px rgba(0,0,0,0.55),
    0 4px 18px rgba(0,0,0,0.35);
  transform-origin:left center;
  transition:transform .28s ease;
  backface-visibility:hidden;
}
.card.flip-next{ animation:flipNext .32s ease; }
.card.flip-prev{ animation:flipPrev .32s ease; }
@keyframes flipNext{
  0%{ transform:rotateY(0deg); opacity:1;}
  45%{ transform:rotateY(-10deg); opacity:.55;}
  100%{ transform:rotateY(0deg); opacity:1;}
}
@keyframes flipPrev{
  0%{ transform:rotateY(0deg); opacity:1;}
  45%{ transform:rotateY(10deg); opacity:.55;}
  100%{ transform:rotateY(0deg); opacity:1;}
}
@media (prefers-reduced-motion: reduce){
  .card.flip-next, .card.flip-prev{ animation:none; }
}

.card-tab{
  position:absolute;
  top:0;
  right:26px;
  transform:translateY(-60%);
  background:var(--red);
  color:#fff;
  font-family:var(--mono);
  font-weight:800;
  font-size:13px;
  letter-spacing:0.1em;
  padding:7px 14px 13px;
  clip-path:polygon(8% 0,92% 0,100% 30%,100% 78%,50% 100%,0 78%,0 30%);
  box-shadow:0 6px 20px rgba(255,59,63,0.45);
}
.card-title{
  font-family:var(--mono);
  font-weight:700;
  font-size:13px;
  letter-spacing:0.16em;
  color:#8a8d92;
  text-transform:uppercase;
  margin-bottom:16px;
  padding-bottom:10px;
  border-bottom:1px dashed rgba(0,0,0,0.14);
}
:root[data-theme="light"] .card-title{ color:var(--text-dim); }
.card-body{
  font-family:var(--sans);
  font-weight:900;
  font-size:var(--body-size, 48px);
  line-height:1.35;
  white-space:pre-wrap;
  word-break:break-word;
  color:#141518;
  flex:1;
}
:root[data-theme="light"] .card-body{ color:var(--text); }

.draw-canvas{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  touch-action:none;
  pointer-events:none;
}
.draw-canvas.active{ pointer-events:auto; }

.nav-btn{
  position:absolute;
  bottom:18px;
  width:54px;
  height:54px;
  border-radius:50%;
  border:1px solid var(--border);
  background:rgba(20,21,25,0.72);
  color:var(--text);
  font-size:26px;
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  backdrop-filter:blur(6px);
  transition:box-shadow .15s ease, border-color .15s ease;
}
.nav-prev{ left:18px; }
.nav-next{ right:18px; }
.nav-btn:active{
  background:var(--red);
  border-color:var(--red);
  box-shadow:0 0 24px rgba(255,59,63,0.55);
}

/* ---------- Draw toolbar ---------- */
.draw-toolbar{
  position:absolute;
  left:50%;
  bottom:86px;
  transform:translateX(-50%);
  display:flex;
  align-items:center;
  gap:12px;
  background:rgba(20,21,25,0.88);
  border:1px solid var(--border);
  padding:10px 16px;
  border-radius:999px;
  box-shadow:0 12px 34px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.04);
  backdrop-filter:blur(10px);
  z-index:20;
}
.swatches{ display:flex; gap:7px; }
.swatch{
  width:22px; height:22px; border-radius:50%;
  border:2px solid rgba(255,255,255,0.28);
  cursor:pointer;
  transition:transform .1s ease, box-shadow .15s ease;
}
.swatch.selected{ border-color:#fff; transform:scale(1.15); box-shadow:0 0 10px currentColor; }
.tool-btn{
  width:36px;height:36px;
  border-radius:8px;
  border:1px solid var(--border);
  background:var(--panel-2);
  color:var(--text);
  cursor:pointer;
}
.tool-btn.active{ background:var(--red); border-color:var(--red); color:#fff; }
.tool-danger{ color:var(--red); font-size:11px; font-weight:700; letter-spacing:.04em; width:auto; padding:0 12px; }
#penSize{ width:80px; accent-color:var(--red); }

/* ---------- Drawer ---------- */
.overlay{
  position:fixed; inset:0;
  background:rgba(0,0,0,0.6);
  z-index:30;
  backdrop-filter:blur(2px);
}
.drawer{
  position:fixed;
  top:0; left:0; bottom:0;
  width:min(340px, 86vw);
  background:linear-gradient(180deg, var(--panel), var(--bg-2));
  border-right:1px solid var(--border);
  z-index:31;
  display:flex;
  flex-direction:column;
  padding: max(14px, env(safe-area-inset-top)) 14px 14px;
  box-shadow:14px 0 40px rgba(0,0,0,0.5);
}
.drawer-head{
  display:flex; align-items:center; justify-content:space-between;
  font-family:var(--mono);
  font-weight:700;
  font-size:12px;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--text-dim);
  margin-bottom:12px;
  padding-bottom:10px;
  border-bottom:1px solid var(--border-soft);
}
.page-list{
  list-style:none; margin:0; padding:0 2px 2px 0;
  overflow-y:auto; flex:1;
  display:flex; flex-direction:column; gap:10px;
}
.page-item{
  position:relative;
  display:flex;
  align-items:stretch;
  gap:8px;
  padding:8px;
  border-radius:12px;
  border:1px solid var(--border);
  background:var(--panel-2);
  cursor:pointer;
  transition:transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}
.page-item:active{ transform:scale(0.98); }
.page-item.current{
  border-color:var(--red);
  box-shadow:0 0 0 1px var(--red), 0 0 22px rgba(255,59,63,0.32);
}
.page-item .num{
  font-family:var(--mono);
  color:var(--text-dim);
  font-size:11px;
  font-weight:700;
  width:18px;
  display:flex;
  align-items:flex-start;
  padding-top:6px;
  letter-spacing:0.02em;
}
.page-item.current .num{ color:var(--red); }
.thumb{
  position:relative;
  flex:1;
  min-width:0;
  aspect-ratio:16/10;
  background:var(--paper-light);
  border-radius:7px;
  overflow:hidden;
  padding:9px 11px;
  display:flex;
  flex-direction:column;
  box-shadow:inset 0 0 0 1px rgba(0,0,0,0.06);
}
.thumb-title{
  font-family:var(--mono);
  font-weight:700;
  font-size:10px;
  letter-spacing:0.05em;
  text-transform:uppercase;
  color:#7c7f85;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  margin-bottom:4px;
}
.thumb-body{
  font-size:11px;
  line-height:1.32;
  color:#1c1d1f;
  overflow:hidden;
  display:-webkit-box;
  -webkit-line-clamp:4;
  -webkit-box-orient:vertical;
  white-space:pre-wrap;
  flex:1;
  font-weight:600;
}
.thumb-draw{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  pointer-events:none;
}
.thumb-empty{
  color:#b4b1a7;
  font-size:11px;
  font-style:italic;
}
.now-badge{
  position:absolute;
  top:6px; right:6px;
  font-family:var(--mono);
  font-size:8px;
  font-weight:800;
  letter-spacing:0.08em;
  color:#fff;
  background:var(--red);
  padding:2px 5px;
  border-radius:3px;
  z-index:2;
  box-shadow:0 0 8px rgba(255,59,63,0.7);
}
.page-item .reorder{
  display:flex;
  flex-direction:column;
  gap:3px;
  justify-content:center;
}
.page-item .reorder button{
  width:22px;height:22px;
  border-radius:5px;
  border:1px solid var(--border);
  background:var(--panel);
  color:var(--text-dim);
  font-size:10px;
}
.drawer-foot{ display:flex; gap:8px; margin-top:12px; }
.hidden-file{ display:none; }

/* ---------- Buttons (shared) ---------- */
.chip-btn{
  appearance:none;
  background:var(--red);
  color:#fff;
  border:none;
  padding:8px 14px;
  border-radius:999px;
  font-size:12px;
  font-weight:700;
  letter-spacing:0.02em;
  cursor:pointer;
  box-shadow:0 4px 14px rgba(255,59,63,0.35);
}
.ghost-btn{
  appearance:none;
  background:transparent;
  color:var(--text);
  border:1px solid var(--border);
  padding:9px 12px;
  border-radius:9px;
  font-size:13px;
  cursor:pointer;
  flex:1;
}
.ghost-btn.danger{ color:var(--red); border-color:var(--red-dim); }

/* ---------- Edit panel ---------- */
.edit-panel{
  position:fixed;
  left:0; right:0; bottom:0;
  background:linear-gradient(180deg, var(--panel), var(--bg-2));
  border-top:1px solid var(--border);
  border-radius:18px 18px 0 0;
  padding:16px 16px max(16px, env(safe-area-inset-bottom));
  z-index:40;
  max-height:78vh;
  overflow-y:auto;
  box-shadow:0 -14px 50px rgba(0,0,0,0.55);
}
.edit-head{
  display:flex; justify-content:space-between; align-items:center;
  font-family:var(--mono);
  font-weight:700;
  font-size:12px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--text-dim);
  margin-bottom:14px;
}
.edit-label-field{
  display:block;
  font-size:11px;
  font-family:var(--mono);
  letter-spacing:0.06em;
  text-transform:uppercase;
  color:var(--text-dim);
  margin-bottom:12px;
}
.edit-label-field.small{ flex:1; margin-bottom:0; }
.edit-label-field input[type="text"],
.edit-label-field textarea{
  display:block;
  width:100%;
  margin-top:6px;
  background:var(--panel-2);
  border:1px solid var(--border);
  color:var(--text);
  border-radius:9px;
  padding:10px;
  font-size:15px;
  font-family:var(--sans);
  resize:vertical;
}
.edit-label-field input[type="text"]:focus,
.edit-label-field textarea:focus{
  outline:none;
  border-color:var(--red);
  box-shadow:0 0 0 3px rgba(255,59,63,0.18);
}
.edit-row{
  display:flex;
  align-items:center;
  gap:12px;
}
#editFontSize{ accent-color:var(--red); }

/* ---------- Settings modal ---------- */
.modal{
  position:fixed; inset:0;
  background:rgba(0,0,0,0.6);
  display:flex; align-items:center; justify-content:center;
  z-index:50;
  padding:20px;
  backdrop-filter:blur(2px);
}
.modal-box{
  background:linear-gradient(180deg, var(--panel), var(--bg-2));
  border:1px solid var(--border);
  border-radius:16px;
  padding:18px;
  width:min(420px, 100%);
  box-shadow:0 30px 80px rgba(0,0,0,0.6);
}
.modal-head{
  font-family:var(--mono);
  font-weight:700;
  font-size:13px;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--text-dim);
  margin-bottom:14px;
}
.setting-row{
  display:flex; align-items:center; justify-content:space-between;
  padding:11px 0;
  border-bottom:1px solid var(--border-soft);
  font-size:14px;
}
.modal-note{
  font-size:11.5px;
  color:var(--text-dim);
  line-height:1.65;
  margin:14px 0;
}

/* ---------- Lock screen ---------- */
.lock-screen{
  position:fixed; inset:0;
  background:
    radial-gradient(ellipse 100% 60% at 50% 0%, rgba(255,59,63,0.1), transparent 60%),
    var(--bg);
  display:flex; align-items:center; justify-content:center;
  z-index:100;
}
.lock-box{ text-align:center; width:280px; }
.lock-title{
  font-family:var(--mono); font-size:22px; font-weight:800; letter-spacing:0.18em;
  text-shadow:0 0 24px rgba(255,59,63,0.4);
}
.lock-sub{ color:var(--text-dim); margin:8px 0 20px; font-size:12px; letter-spacing:.04em; }
.lock-dots{ display:flex; justify-content:center; gap:12px; margin-bottom:22px; }
.lock-dots span{
  width:11px;height:11px;border-radius:50%;
  border:1px solid var(--border);
  background:transparent;
  transition:all .15s ease;
}
.lock-dots span.filled{ background:var(--red); border-color:var(--red); box-shadow:0 0 10px rgba(255,59,63,0.6); }
.lock-pad{
  display:grid;
  grid-template-columns:repeat(3, 64px);
  gap:12px;
  justify-content:center;
}
.lock-pad button{
  width:64px; height:64px;
  border-radius:50%;
  border:1px solid var(--border);
  background:var(--panel-2);
  color:var(--text);
  font-size:19px;
  font-family:var(--mono);
  transition:border-color .15s ease, box-shadow .15s ease;
}
.lock-pad button:active{ border-color:var(--red); box-shadow:0 0 16px rgba(255,59,63,0.4); }
.lock-error{ color:var(--red); font-size:12px; height:18px; margin-top:12px; letter-spacing:.03em; }

/* scrollbars minimal */
::-webkit-scrollbar{ width:6px; height:6px; }
::-webkit-scrollbar-thumb{ background:var(--border); border-radius:4px; }

@media (min-width:900px){
  .card-body{ font-size:var(--body-size, 56px); }
}