:root {
  --bg: #f6f1e7; --card: #fffdf8; --ink: #17261e; --mute: #5d6b63; --line: #e2dccd;
  --green: #1f6f4a; --green-soft: #dcebe1; --yellow: #f7c531; --red: #c8382d; --red-soft: #f7dedb;
  --on-green: #fff; --shadow: 0 1px 2px rgba(23,38,30,.06), 0 6px 20px rgba(23,38,30,.06);
  --r: 18px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1713; --card: #18231d; --ink: #e8efe9; --mute: #9aa9a0; --line: #2a382f;
    --green: #3fae7a; --green-soft: #1d3327; --yellow: #f7c531; --red: #ef6a5e; --red-soft: #3a211f;
    --on-green: #08130d; --shadow: none;
  }
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.45 ui-rounded, "SF Pro Rounded", -apple-system, system-ui, "Segoe UI", sans-serif;
  min-height: 100dvh; overscroll-behavior-y: none;
}
#app {
  max-width: 760px; margin: 0 auto;
  padding: calc(18px + env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) calc(110px + env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
}
.boot { text-align: center; color: var(--mute); padding: 40vh 0 0; }
h1 { font-size: 30px; line-height: 1.15; margin: 0 0 6px; letter-spacing: -.01em; }
h2 { font-size: 20px; margin: 26px 0 10px; }
p { margin: 0 0 12px; }
.mute { color: var(--mute); }
.small { font-size: 14px; }
a { color: var(--green); }

button, input { font: inherit; color: inherit; }
button { cursor: pointer; touch-action: manipulation; user-select: none; -webkit-user-select: none; }
.btn {
  display: block; width: 100%; min-height: 54px; padding: 12px 18px; border: 0; border-radius: 16px;
  background: var(--green); color: var(--on-green); font-weight: 700; font-size: 18px;
  transition: transform .12s ease, opacity .12s ease;
}
.btn:active { transform: scale(.98); }
.btn[disabled] { opacity: .4; }
.btn.ghost { background: transparent; color: var(--green); border: 2px solid var(--line); }
.btn.warn { background: transparent; color: var(--red); border: 2px solid var(--line); }
.btn.yellow { background: var(--yellow); color: #17261e; }
.row { display: flex; gap: 10px; }
.row > * { flex: 1; }
.stack > * + * { margin-top: 10px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 18px; box-shadow: var(--shadow); }
.card + .card { margin-top: 12px; }

/* Sign-in */
.hero { text-align: center; padding: 6vh 0 18px; }
.hero svg { width: 92px; height: 92px; }
.hero h1 { font-size: 34px; margin-top: 12px; }
.gift { display: inline-block; margin: 14px 0 0; padding: 8px 14px; border-radius: 999px; background: var(--yellow); color: #17261e; font-weight: 700; font-size: 15px; }
label { display: block; font-weight: 700; font-size: 15px; margin: 14px 0 6px; }
input[type=text], input[type=password] {
  width: 100%; height: 54px; padding: 0 16px; border-radius: 14px; border: 2px solid var(--line);
  background: var(--bg); font-size: 18px; outline: none;
}
input:focus { border-color: var(--green); }
.err { color: var(--red); font-weight: 600; min-height: 24px; margin: 10px 0 0; }
.seg { display: flex; background: var(--bg); border: 1px solid var(--line); border-radius: 14px; padding: 4px; }
.seg button { flex: 1; min-height: 44px; border: 0; border-radius: 10px; background: transparent; font-weight: 700; color: var(--mute); }
.seg button.on { background: var(--card); color: var(--ink); box-shadow: var(--shadow); }

/* Home */
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.streak { white-space: nowrap; font-weight: 700; background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 8px 14px; }
.ready { display: flex; align-items: center; gap: 18px; }
.ring { flex: none; width: 112px; height: 112px; }
.ring text { font-weight: 800; font-size: 26px; fill: var(--ink); }
.checks { list-style: none; margin: 8px 0 0; padding: 0; font-size: 15px; }
.checks li { padding: 3px 0 3px 26px; position: relative; color: var(--mute); }
.checks li::before { content: ""; position: absolute; left: 0; top: 7px; width: 16px; height: 16px; border-radius: 50%; border: 2px solid var(--line); }
.checks li.ok { color: var(--ink); }
.checks li.ok::before { background: var(--green); border-color: var(--green); }
.grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
@media (min-width: 640px) { .grid { grid-template-columns: 1fr 1fr; } h1 { font-size: 36px; } }
.tile {
  display: flex; align-items: center; gap: 14px; width: 100%; text-align: left; min-height: 76px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 14px 16px; box-shadow: var(--shadow);
  transition: transform .12s ease;
}
.tile:active { transform: scale(.985); }
.tile .ico { flex: none; width: 46px; height: 46px; border-radius: 13px; background: var(--green-soft); display: grid; place-items: center; font-size: 24px; }
.tile .txt { flex: 1; min-width: 0; }
.tile b { display: block; font-size: 17px; }
.tile span.sub { display: block; font-size: 14px; color: var(--mute); }
.bar { height: 7px; border-radius: 4px; background: var(--line); overflow: hidden; margin-top: 7px; }
.bar i { display: block; height: 100%; background: var(--green); border-radius: 4px; transition: width .4s ease; }
.pct { flex: none; font-weight: 800; font-variant-numeric: tabular-nums; color: var(--mute); }
.foot { text-align: center; color: var(--mute); font-size: 14px; margin: 28px 0 0; }

/* Quiz */
.qhead { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.qhead .bar { flex: 1; margin: 0; height: 9px; }
.x { flex: none; width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line); background: var(--card); font-size: 20px; line-height: 1; }
.count { flex: none; font-weight: 700; font-size: 15px; color: var(--mute); font-variant-numeric: tabular-nums; }
.sign { display: block; width: 150px; height: 150px; margin: 0 auto 14px; }
.sign text { font-family: -apple-system, "Helvetica Neue", Arial, sans-serif; }
.qtext { font-size: 22px; line-height: 1.3; font-weight: 700; margin: 0 0 18px; text-wrap: pretty; }
.opt {
  display: flex; align-items: center; gap: 12px; width: 100%; text-align: left; min-height: 62px; padding: 14px 16px;
  background: var(--card); border: 2px solid var(--line); border-radius: 16px; font-size: 18px; line-height: 1.3;
  transition: transform .12s ease, border-color .12s ease, background .12s ease;
}
.opt + .opt { margin-top: 10px; }
.opt:active { transform: scale(.985); }
.opt .dot { flex: none; width: 28px; height: 28px; border-radius: 50%; border: 2px solid var(--line); display: grid; place-items: center; font-size: 14px; font-weight: 800; color: var(--mute); }
.opt.sel { border-color: var(--green); background: var(--green-soft); }
.opt.good { border-color: var(--green); background: var(--green-soft); }
.opt.good .dot { background: var(--green); border-color: var(--green); color: var(--on-green); }
.opt.bad { border-color: var(--red); background: var(--red-soft); }
.opt.bad .dot { background: var(--red); border-color: var(--red); color: #fff; }
.opt[disabled] { cursor: default; opacity: 1; color: inherit; }
.why { margin-top: 14px; padding: 14px 16px; border-radius: 16px; background: var(--green-soft); animation: rise .22s ease-out; }
.why.no { background: var(--red-soft); }
.why b { display: block; margin-bottom: 4px; }
.why a { display: inline-block; margin-top: 8px; font-size: 14px; font-weight: 600; }
.next { margin-top: 16px; }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } }

/* Results */
.score { text-align: center; padding: 10px 0 4px; }
.score .big { font-size: 64px; font-weight: 800; line-height: 1; font-variant-numeric: tabular-nums; }
.badge { display: inline-block; margin-top: 10px; padding: 6px 14px; border-radius: 999px; font-weight: 800; }
.badge.pass { background: var(--green); color: var(--on-green); }
.badge.fail { background: var(--red-soft); color: var(--red); }
.miss { padding: 14px 0; border-top: 1px solid var(--line); }
.miss:first-of-type { border-top: 0; }
.miss .q { font-weight: 700; }
.miss .a { color: var(--green); font-weight: 600; margin-top: 4px; }
.miss .y { color: var(--red); margin-top: 2px; text-decoration: line-through; }
.miss .sign { width: 84px; height: 84px; margin: 0 0 8px; }

/* Cheat sheet */
table { width: 100%; border-collapse: collapse; }
td { padding: 9px 0; border-top: 1px solid var(--line); vertical-align: top; }
tr:first-child td { border-top: 0; }
td:first-child { font-weight: 800; white-space: nowrap; padding-right: 14px; color: var(--green); font-variant-numeric: tabular-nums; }
.signs { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; }
.signs figure { margin: 0; text-align: center; font-size: 14px; }
.signs .sign { width: 84px; height: 84px; margin: 0 auto 6px; }

/* Navigation: bottom tabs on phones and tablets, a sidebar on laptops */
#tabs {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 5; display: flex; justify-content: center;
  padding: 6px max(8px, env(safe-area-inset-right)) calc(6px + env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-left));
  background: color-mix(in srgb, var(--bg) 86%, transparent); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
}
#tabs[hidden] { display: none; }
#tabs .brand, #tabs .navfoot { display: none; }
#tabs button { flex: 1; max-width: 150px; min-height: 52px; border: 0; background: transparent; border-radius: 14px; font-size: 11.5px; font-weight: 700; color: var(--mute); }
#tabs button svg { display: block; width: 24px; height: 24px; margin: 0 auto 3px; }
#tabs button span { display: block; white-space: nowrap; }
#tabs button.on { color: var(--green); }

/* Home extras */
.herocard { background: linear-gradient(135deg, #237a52, #164a35); border-color: transparent; color: #fff; }
.herocard .ring circle:first-child { stroke: rgba(255,255,255,.18); }
.herocard .ring circle:nth-child(2) { stroke: var(--yellow); }
.herocard .ring text { fill: #fff; }
.herocard .checks li { color: rgba(255,255,255,.72); }
.herocard .checks li.ok { color: #fff; }
.herocard .checks li::before { border-color: rgba(255,255,255,.4); }
.herocard .checks li.ok::before { background: var(--yellow); border-color: var(--yellow); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 12px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 12px 8px; text-align: center; box-shadow: var(--shadow); }
.stat b { display: block; font-size: 22px; line-height: 1.1; font-variant-numeric: tabular-nums; }
.stat span { display: block; font-size: 12px; color: var(--mute); margin-top: 3px; }
.chev { flex: none; font-size: 26px; line-height: 1; color: var(--mute); opacity: .6; }
.tile.off { opacity: .55; cursor: default; }
.tile.off:active { transform: none; }
@media (hover: hover) {
  .tile:not(.off):hover, .urow:hover { border-color: var(--green); }
  .opt:not([disabled]):hover { border-color: var(--green); }
  .btn:not([disabled]):hover { filter: brightness(1.06); }
}
:focus-visible { outline: 3px solid var(--yellow); outline-offset: 2px; }

/* Admin */
.ulist { margin-top: 16px; display: grid; gap: 10px; }
.urow {
  display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1.3fr) repeat(4, minmax(0, .8fr)); gap: 14px; align-items: center; width: 100%; text-align: left;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 14px 16px; box-shadow: var(--shadow);
}
.urow b { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.urow .sub { display: block; font-size: 13px; color: var(--mute); }
.urow .prog { display: flex; align-items: center; gap: 10px; }
.urow .prog .bar { flex: 1; margin: 0; }
.urow .cell { text-align: center; }
@media (max-width: 720px) {
  .urow { grid-template-columns: 1fr 1fr; }
  .urow .who, .urow .prog { grid-column: 1 / -1; }
  .urow .cell { text-align: left; }
  .stats { gap: 6px; }
  .stat { padding: 10px 2px; }
  .stat b { font-size: 20px; }
  .stat span { font-size: 11px; }
}
.back { border: 0; background: transparent; color: var(--green); font-weight: 700; padding: 8px 0; margin-bottom: 6px; min-height: 44px; }
.trow { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) 54px; gap: 12px; align-items: center; padding: 8px 0; border-top: 1px solid var(--line); font-size: 15px; }
.trow:first-child { border-top: 0; }
.trow .bar { margin: 0; }
.trow .pct { text-align: right; font-size: 14px; }
.trow .tname { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Laptop */
@media (min-width: 1024px) {
  #tabs {
    top: 0; right: auto; width: 232px; flex-direction: column; justify-content: flex-start; gap: 4px;
    padding: 22px 14px; border-top: 0; border-right: 1px solid var(--line); background: var(--card); backdrop-filter: none; -webkit-backdrop-filter: none;
  }
  #tabs .brand { display: flex; align-items: center; gap: 10px; padding: 0 8px 18px; font-size: 18px; }
  #tabs .brand svg { width: 36px; height: 36px; }
  #tabs .navfoot { display: block; margin: auto 8px 0; font-size: 13px; color: var(--mute); }
  #tabs button { flex: none; max-width: none; width: 100%; min-height: 46px; display: flex; align-items: center; gap: 12px; padding: 0 12px; font-size: 16px; text-align: left; }
  #tabs button svg { margin: 0; width: 22px; height: 22px; }
  #tabs button.on { background: var(--green-soft); }
  #tabs button:hover { background: var(--green-soft); }
  #app { max-width: 1000px; padding: 40px 40px 60px; }
  body:has(#tabs:not([hidden])) #app { margin-left: calc(232px + max(0px, (100vw - 232px - 1000px) / 2)); margin-right: 0; }
  body:has(#tabs[hidden]) #app { max-width: 720px; }
  .grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .signs { grid-template-columns: repeat(6, 1fr); }
  .qtext { font-size: 26px; }
  .opt { font-size: 19px; }
}

@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }