@font-face {
  font-family: "Inter";
  src: url("inter.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --bg: #f6f3ee;
  --card: #ffffff;
  --ink: #1b1b1f;
  --mut: #7b7b86;
  --chip: #efecf7;
  --no: #ff6b5b;
  --yes: #21b07a;
  --up: #6c63ff;
  --shadow: 0 18px 40px rgba(20, 20, 40, .12);
  --shadow-sm: 0 8px 20px rgba(20, 20, 40, .10);
}
/* dark: follows the device unless Settings picks a theme (data-theme on <html>) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141418;
    --card: #22222a;
    --ink: #f2f2f5;
    --mut: #9a9aa6;
    --chip: #2c2b3a;
    --shadow: 0 18px 40px rgba(0, 0, 0, .45);
    --shadow-sm: 0 8px 20px rgba(0, 0, 0, .35);
  }
}
:root[data-theme="dark"] {
  --bg: #141418;
  --card: #22222a;
  --ink: #f2f2f5;
  --mut: #9a9aa6;
  --chip: #2c2b3a;
  --shadow: 0 18px 40px rgba(0, 0, 0, .45);
  --shadow-sm: 0 8px 20px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg); color: var(--ink);
  font: 16px/1.45 Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}
button, select, input { font: inherit; color: inherit; }
button { cursor: pointer; border: 0; background: none; padding: 0; }

.view {
  position: fixed; inset: 0; display: flex; flex-direction: column;
  max-width: 520px; margin: 0 auto;
  padding: calc(18px + env(safe-area-inset-top)) 18px calc(18px + env(safe-area-inset-bottom));
}
.top { display: flex; justify-content: space-between; align-items: center; font-size: 13px; color: var(--mut); min-height: 32px; }
.topr { display: flex; align-items: center; gap: 10px; }
.iconbtn { width: 32px; height: 32px; border-radius: 50%; background: var(--chip); color: var(--ink); font-size: 16px; }
.x { width: 32px; height: 32px; border-radius: 50%; background: var(--chip); color: var(--ink); font-weight: 700; flex: none; }

/* ---------- home ---------- */
.home { overflow-y: auto; scrollbar-width: none; }
.home::-webkit-scrollbar { display: none; }
.home h1 { font-size: 30px; letter-spacing: -.03em; margin: 22px 0 2px; }
.home .sub { color: var(--mut); }
.ring {
  --p: 0;
  width: 200px; height: 200px; border-radius: 50%; margin: 22px auto 14px; flex: none;
  background: conic-gradient(var(--up) calc(var(--p) * 1%), var(--chip) 0);
  display: grid; place-items: center;
}
.ring > div { width: 160px; height: 160px; border-radius: 50%; background: var(--bg); display: grid; place-content: center; text-align: center; }
.ring b { font-size: 40px; line-height: 1; letter-spacing: -.03em; }
.ring span { font-size: 12px; color: var(--mut); margin-top: 4px; }
.tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.tile { background: var(--card); border-radius: 18px; padding: 12px 14px; font-size: 12px; color: var(--mut); text-align: left; }
.tile b { display: block; font-size: 22px; color: var(--ink); letter-spacing: -.02em; }
.tbtn:active { transform: scale(.98); }
.go {
  margin-top: auto; flex: none; background: var(--ink); color: var(--bg);
  padding: 17px; border-radius: 20px; font-weight: 700; font-size: 17px;
}
.go:active, .act:active { transform: scale(.96); }

/* ---------- deck ---------- */
.pbar { flex: 1; height: 5px; background: var(--chip); border-radius: 9px; margin: 0 12px; overflow: hidden; }
.pbar i { display: block; height: 100%; width: 0; background: var(--up); border-radius: 9px; transition: width .3s; }
.hintline { display: none; }
.deckbody { flex: 1; display: flex; flex-direction: column; justify-content: center; min-height: 0; }
.stack { position: relative; flex: 1; max-height: 560px; margin: 18px 0 26px; }
.cardx {
  position: absolute; inset: 0; background: var(--card); border-radius: 28px; box-shadow: var(--shadow);
  padding: 24px 22px; display: flex; flex-direction: column; overflow: hidden; transform-origin: 50% 100%;
}
.ghost.g1 { transform: translate(6px, 8px) rotate(3deg) scale(.97); opacity: .8; }
.ghost.g2 { transform: translate(12px, 14px) rotate(6deg) scale(.94); opacity: .5; }
.top-card { touch-action: none; user-select: none; -webkit-user-select: none; cursor: grab; will-change: transform; }
.top-card.scrolly { touch-action: pan-y; }
.top-card.enter { animation: enter .22s ease-out; }
@keyframes enter { from { transform: translate(6px, 8px) rotate(3deg) scale(.97); opacity: .8; } }
.top-card.fly { transition: transform .28s ease-in, opacity .28s ease-in; }
.top-card.back { transition: transform .25s cubic-bezier(.2, 1.4, .4, 1); }

.stamp {
  position: absolute; top: 22px; border: 3px solid; font-weight: 800; padding: 2px 10px; border-radius: 8px;
  font-size: 15px; letter-spacing: .06em; opacity: 0; pointer-events: none; z-index: 2; background: var(--card);
}
.stamp.l { right: 20px; color: var(--no); transform: rotate(12deg); }
.stamp.r { left: 20px; color: var(--yes); transform: rotate(-12deg); }
.stamp.u { left: 50%; top: auto; bottom: 30px; color: var(--up); transform: translateX(-50%); }

.cscroll { flex: 1; overflow-y: auto; display: flex; flex-direction: column; overscroll-behavior: contain; scrollbar-width: none; }
.cscroll::-webkit-scrollbar { display: none; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chipx { font-size: 11px; font-weight: 700; background: var(--chip); color: var(--up); padding: 3px 9px; border-radius: 99px; }
.wbox { margin-top: auto; padding-top: 18px; }
.cw { font-size: clamp(34px, 11vw, 44px); font-weight: 800; letter-spacing: -.03em; line-height: 1.05; word-break: break-word; }
.ipa { color: var(--mut); display: flex; align-items: center; gap: 6px; margin-top: 4px; }
.spk { font-size: 18px; padding: 4px 8px; border-radius: 99px; margin-left: -4px; }
.spk:active { background: var(--chip); }
.tapme { color: var(--mut); font-size: 13px; margin-top: 18px; display: flex; align-items: center; gap: 8px; }
.tapme::before { content: ""; width: 18px; height: 2px; background: var(--chip); border-radius: 2px; }
.meaning { margin-top: 14px; }
.sense + .sense { margin-top: 14px; }
.pos { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--up); font-weight: 700; }
.def { font-size: 18px; line-height: 1.4; margin-top: 2px; }
.def + .def { margin-top: 6px; }
.def.n2 { font-size: 16px; color: var(--mut); }
.ex { color: var(--mut); font-size: 14px; margin-top: 6px; }
.ex b { color: var(--ink); font-weight: 600; }

.donecard { align-items: center; justify-content: center; text-align: center; gap: 8px; }
.donecard .big { font-size: 54px; }
.donecard h2 { margin: 0; letter-spacing: -.02em; }
.donecard p { color: var(--mut); margin: 0 0 14px; }
.pill { background: var(--chip); color: var(--ink); padding: 12px 18px; border-radius: 99px; font-weight: 600; }
.pill.dark { background: var(--ink); color: var(--bg); }

.acts { display: flex; justify-content: space-around; align-items: center; flex: none; }
.act {
  width: 64px; height: 64px; border-radius: 50%; background: var(--card); box-shadow: var(--shadow-sm);
  display: grid; place-items: center; font-size: 26px; font-weight: 800; transition: transform .1s;
}
.act.sm { width: 50px; height: 50px; font-size: 20px; }
.act.no { color: var(--no); }
.act.yes { color: var(--yes); }
.act.mid { color: var(--up); }
.act:disabled { opacity: .35; }
.lab { display: flex; justify-content: space-around; font-size: 11px; color: var(--mut); margin-top: 6px; flex: none; }
.lab span { width: 64px; text-align: center; }

/* ---------- sort ---------- */
.seg { display: flex; align-items: center; gap: 6px; margin: 16px 0 12px; font-size: 13px; color: var(--mut); flex-wrap: wrap; }
.seg button { padding: 6px 12px; border-radius: 99px; background: var(--chip); color: var(--ink); font-weight: 600; font-size: 13px; }
.seg button.on { background: var(--ink); color: var(--bg); }
.chipgrid { flex: 1; overflow-y: auto; display: flex; flex-wrap: wrap; align-content: flex-start; gap: 8px; padding: 2px; min-height: 0; }
.wchip {
  padding: 9px 14px; border-radius: 14px; font-size: 16px; font-weight: 600;
  background: var(--card); box-shadow: 0 2px 6px rgba(20, 20, 40, .06); border: 2px solid transparent;
  transition: transform .08s;
}
.wchip:active { transform: scale(.95); }
.wchip.dk { border-color: var(--no); color: var(--no); background: color-mix(in srgb, var(--no) 10%, var(--card)); }
.wchip.k.on { border-color: var(--yes); color: var(--yes); background: color-mix(in srgb, var(--yes) 10%, var(--card)); }
.sortbar { display: flex; gap: 10px; align-items: stretch; margin-top: 14px; flex: none; }
.sortbar .pill { flex: none; }
.sortbar .pill:disabled { opacity: .4; }
.sortbar .go { flex: 1; margin: 0; }
.sortsum { text-align: center; font-size: 12px; color: var(--mut); margin-top: 8px; flex: none; }
.sortsum .k { color: var(--yes); } .sortsum .dk { color: var(--no); }
.sortdone { width: 100%; text-align: center; padding-top: 60px; }
.sortdone .big { font-size: 54px; }
.sortdone p { color: var(--mut); }

/* ---------- settings ---------- */
.settings { overflow-y: auto; scrollbar-width: none; }
.settings::-webkit-scrollbar { display: none; }
.settings > *, .home > * { flex-shrink: 0; }
.settings .ttl { font-size: 16px; font-weight: 700; color: var(--ink); }
.settings h3 { font-size: 13px; text-transform: uppercase; letter-spacing: .08em; color: var(--mut); margin: 26px 4px 6px; }
.group { background: var(--card); border-radius: 18px; overflow: hidden; margin-top: 18px; }
.settings h3 + .note + .group, .settings h3 + .group { margin-top: 8px; }
.row {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 15px 16px; width: 100%; text-align: left; font-size: 15px; position: relative;
}
.row + .row { border-top: 1px solid var(--chip); }
.row span { color: var(--mut); }
.row select { background: var(--chip); border: 0; border-radius: 10px; padding: 6px 10px; }
.row input[type=checkbox] { width: 22px; height: 22px; accent-color: var(--up); }
.row.danger { color: var(--no); }
.filebtn { cursor: pointer; }
.filebtn input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.note { color: var(--mut); font-size: 13px; margin: 0 4px; }

.toast {
  position: fixed; left: 50%; top: calc(64px + env(safe-area-inset-top)); transform: translateX(-50%);
  background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 14px; font-size: 14px;
  max-width: 90%; z-index: 20; box-shadow: var(--shadow-sm);
}

/* settings: level picker */
.levelpick { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin-top: 8px; }
.levelpick button { padding: 12px 0; border-radius: 14px; background: var(--card); color: var(--mut); font-weight: 700; border: 2px solid transparent; }
.levelpick button.on { background: color-mix(in srgb, var(--up) 12%, var(--card)); color: var(--up); border-color: var(--up); }
.levelpick + .note { margin-top: 8px; }
.uk { font-size: 12px; color: var(--mut); background: var(--chip); padding: 1px 7px; border-radius: 99px; }