:root {
  --sky: #E9F2FB;
  --navy: #1C2B4A;
  --navy-2: #2E4470;
  --ink: #22304A;
  --muted: #64738F;
  --paper: #FFFFFF;
  --stamp: #F5C542;
  --stamp-dark: #C99A17;
  --ok: #2FA36B;
  --ok-bg: #E3F6EC;
  --bad: #E5533D;
  --bad-bg: #FDE8E4;
  --line: #CFDDEB;
  --radius: 22px;
  --shadow: 0 10px 30px rgba(28, 43, 74, .12);
  --font-display: "Fredoka", "Nunito", system-ui, sans-serif;
  --font-body: "Nunito", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html { color-scheme: light; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.45;
  color: var(--ink);
  background: var(--sky);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(245,197,66,.28) 0, transparent 22rem),
    radial-gradient(circle at 92% 92%, rgba(46,68,112,.14) 0, transparent 26rem);
  background-attachment: fixed;
  min-height: 100vh;
  padding-bottom: env(safe-area-inset-bottom, 0);
}
button, input { font: inherit; }
button { cursor: pointer; }
h1, h2, h3, .card-main, .result-pct, .stat-num, .timer, .mode-title { font-family: var(--font-display); }
h1 { font-size: clamp(2rem, 6vw, 2.9rem); line-height: 1.1; margin: .4rem 0 .6rem; color: var(--navy); font-weight: 700; }
h2 { font-size: 1.7rem; margin: .2rem 0 .4rem; color: var(--navy); font-weight: 600; }
h3 { font-size: 1.1rem; margin: 1.4rem 0 .5rem; color: var(--navy-2); font-weight: 600; }

/* top bar */
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: calc(.7rem + env(safe-area-inset-top, 0)) 1.1rem .7rem;
  max-width: 640px; margin: 0 auto;
}
.brand { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; color: var(--navy); text-decoration: none; }
.linkbtn { background: none; border: 0; color: var(--navy-2); font-weight: 800; padding: .4rem .5rem; border-radius: 10px; }
.linkbtn:hover { background: rgba(28,43,74,.07); }
.linkbtn.center { display: block; margin: .6rem auto 0; }

#app { max-width: 640px; margin: 0 auto; padding: .4rem 1rem 3rem; }
.screen { animation: enter .35s ease both; }
@keyframes enter { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* home */
.hero { text-align: left; padding: 1.2rem 0 .8rem; }
.hero-flags { font-size: 1.7rem; letter-spacing: .15rem; line-height: 1.3; word-break: break-all; opacity: .95; user-select: none; }
.lede { color: var(--muted); font-size: 1.05rem; margin: 0; max-width: 34ch; }

.player { display: flex; flex-direction: column; gap: .3rem; margin: 1.2rem 0 1rem; }
.player span { font-weight: 800; color: var(--navy-2); font-size: .95rem; }
.player input, .typeform input {
  width: 100%; padding: .85rem 1rem; border: 2px solid var(--line); border-radius: 14px;
  background: var(--paper); color: var(--ink); font-size: 1.1rem; font-weight: 700;
}
.player input.bad { border-color: var(--bad); background: var(--bad-bg); }
.field-msg { color: #B63A28; font-weight: 700; font-size: .9rem; }
.player input:focus, .typeform input:focus { outline: 3px solid var(--stamp); outline-offset: 1px; border-color: var(--navy-2); }

.modes { display: grid; grid-template-columns: 1fr 1fr; gap: .8rem; }
@media (max-width: 480px) { .modes { grid-template-columns: 1fr; } }
.mode {
  position: relative; text-align: left; display: flex; flex-direction: column; gap: .25rem;
  background: var(--paper); border: 2px solid transparent; border-radius: var(--radius);
  padding: 1.1rem 1.1rem 1.2rem; box-shadow: var(--shadow); color: var(--ink);
  transition: transform .12s ease, border-color .12s ease;
}
.mode:hover, .mode:focus-visible { transform: translateY(-2px); border-color: var(--stamp); outline: none; }
.mode:active { transform: scale(.985); }
.mode-icon { font-size: 2rem; line-height: 1; }
.mode-title { font-size: 1.3rem; font-weight: 600; color: var(--navy); margin-top: .3rem; }
.mode-desc { color: var(--muted); font-size: .95rem; }
.mode-tag {
  position: absolute; top: .9rem; right: .9rem; font-size: .75rem; font-weight: 800;
  background: var(--sky); color: var(--navy-2); padding: .2rem .55rem; border-radius: 999px;
}
.mode-study { background: var(--navy); color: #fff; }
.mode-study .mode-title { color: #fff; }
.mode-study .mode-desc { color: #C9D6EA; }
.mode-study .mode-tag { background: var(--stamp); color: var(--navy); }

/* hud */
.hud { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; padding: .3rem 0 .6rem; }
.hud-item { font-weight: 800; color: var(--muted); font-size: .95rem; }
.hud-item b { color: var(--navy); font-size: 1.05rem; }
.hud-item.ok b { color: var(--ok); }
.hud-item.bad b { color: var(--bad); }
.hud .timer {
  margin-left: auto; font-size: 1.25rem; font-weight: 600; color: var(--navy);
  background: var(--stamp); padding: .15rem .7rem; border-radius: 999px;
  box-shadow: inset 0 -2px 0 var(--stamp-dark);
}
.hud-title { margin: 0 0 0 .3rem; font-size: 1.5rem; }
.progressbar { height: 8px; background: rgba(28,43,74,.1); border-radius: 999px; overflow: hidden; margin-bottom: 1rem; }
.progressbar div { height: 100%; width: 0; background: var(--navy); border-radius: 999px; transition: width .3s ease; }
.game-title { font-size: 1.1rem; color: var(--muted); font-weight: 600; margin: 0 0 .6rem; }

/* card (postcard) */
.card {
  position: relative; background: var(--paper); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 2.2rem 1.4rem 1.8rem; min-height: 230px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center;
  border: 2px solid rgba(28,43,74,.06);
}
.card::after { /* postcard lines */
  content: ""; position: absolute; left: 1.2rem; right: 1.2rem; bottom: .9rem; height: 1px;
  background: repeating-linear-gradient(90deg, var(--line) 0 10px, transparent 10px 18px);
  opacity: .7;
}
.stamp {
  position: absolute; top: .8rem; right: .8rem; font-size: 2.6rem; line-height: 1;
  background: #fff; padding: .35rem .45rem .25rem; border-radius: 6px;
  border: 3px dashed var(--line); transform: rotate(6deg);
}
.card-kicker { color: var(--muted); font-weight: 800; font-size: .9rem; }
.card-main { font-size: clamp(1.8rem, 6.5vw, 2.6rem); font-weight: 700; color: var(--navy); line-height: 1.15; margin: .2rem 0; }
.card-hint { color: var(--muted); font-size: .85rem; margin-top: .6rem; }
.streak { position: absolute; left: .9rem; top: .9rem; font-weight: 800; color: var(--stamp-dark); font-size: .95rem; }

/* flip */
.flip { cursor: pointer; perspective: 1200px; padding: 0; background: transparent; box-shadow: none; border: 0; min-height: 260px; }
.flip::after { display: none; }
.flip .card-face {
  position: absolute; inset: 0; background: var(--paper); border-radius: var(--radius); box-shadow: var(--shadow);
  display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center;
  padding: 2rem 1.2rem; backface-visibility: hidden; transition: transform .5s cubic-bezier(.2,.7,.2,1);
  border: 2px solid rgba(28,43,74,.06);
}
.flip .card-back { transform: rotateY(180deg); background: var(--navy); }
.flip .card-back .card-main { color: #fff; }
.flip .card-back .card-kicker { color: #C9D6EA; }
.flip.flipped .card-front { transform: rotateY(-180deg); }
.flip.flipped .card-back { transform: rotateY(0); }
@media (prefers-reduced-motion: reduce) { .flip .card-face { transition: none; } .screen { animation: none; } }

/* buttons */
.actions { display: flex; gap: .8rem; margin-top: 1rem; }
.actions.two > * { flex: 1; }
.btn {
  border: 0; border-radius: 16px; padding: .95rem 1.2rem; font-weight: 800; font-size: 1.05rem;
  transition: transform .1s ease, box-shadow .1s ease;
}
.btn:active { transform: scale(.97); }
.btn.primary { background: var(--navy); color: #fff; box-shadow: 0 4px 0 #111c33; }
.btn.primary:hover { background: var(--navy-2); }
.btn.ghost { background: var(--paper); color: var(--navy); border: 2px solid var(--line); }
.btn:focus-visible { outline: 3px solid var(--stamp); outline-offset: 2px; }

.typeform { display: flex; gap: .6rem; margin-top: 1rem; }
.typeform input { flex: 1; }
.typeform input.ok { border-color: var(--ok); background: var(--ok-bg); }
.typeform input.bad { border-color: var(--bad); background: var(--bad-bg); }

.options { display: grid; grid-template-columns: 1fr 1fr; gap: .7rem; margin-top: 1rem; }
@media (max-width: 420px) { .options { grid-template-columns: 1fr; } }
.opt {
  background: var(--paper); border: 2px solid var(--line); border-radius: 16px; padding: 1rem .9rem;
  font-weight: 800; font-size: 1.05rem; color: var(--navy); min-height: 62px;
  transition: transform .1s ease, background .15s ease, border-color .15s ease;
}
.opt:hover:not(:disabled) { border-color: var(--navy-2); transform: translateY(-1px); }
.opt:disabled { cursor: default; }
.opt.ok { background: var(--ok-bg); border-color: var(--ok); color: #1D7A4E; }
.opt.bad { background: var(--bad-bg); border-color: var(--bad); color: #B63A28; }
.opt.dim { opacity: .45; }

.feedback {
  margin-top: .9rem; padding: .8rem 1rem; border-radius: 14px; font-weight: 800; text-align: center;
  animation: pop .25s ease both;
}
.feedback.ok { background: var(--ok-bg); color: #1D7A4E; }
.feedback.bad { background: var(--bad-bg); color: #B63A28; }
.feedback small { display: block; font-weight: 700; opacity: .85; margin-top: .15rem; }
@keyframes pop { from { transform: scale(.95); opacity: 0; } to { transform: none; opacity: 1; } }

/* results */
.result-head { text-align: center; padding-top: .6rem; }
.result-pct {
  display: inline-block; font-size: 3.6rem; font-weight: 700; color: var(--navy); line-height: 1;
  background: var(--stamp); padding: .5rem 1.1rem .4rem; border-radius: 999px;
  box-shadow: inset 0 -4px 0 var(--stamp-dark); transform: rotate(-4deg); margin-bottom: .8rem;
}
.result-mode { color: var(--muted); font-weight: 800; margin: 0; }
.praise { text-align: center; font-size: 1.1rem; font-weight: 700; color: var(--navy-2); margin: .8rem auto; max-width: 40ch; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: .6rem; margin-top: .6rem; }
@media (max-width: 460px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat { background: var(--paper); border-radius: 16px; padding: .8rem .4rem; text-align: center; display: flex; flex-direction: column; box-shadow: var(--shadow); }
.stat span:last-child { color: var(--muted); font-size: .85rem; font-weight: 800; }
.stat-num { font-size: 1.7rem; font-weight: 600; color: var(--navy); }
.stat-num.ok { color: var(--ok); } .stat-num.bad { color: var(--bad); }
.rank { text-align: center; font-weight: 800; color: var(--navy-2); margin: .9rem 0 .2rem; min-height: 1.4rem; }
.badges { display: flex; flex-direction: column; gap: .6rem; margin-top: .8rem; }
.badge {
  display: flex; align-items: center; gap: .9rem; background: var(--navy); color: #fff;
  border-radius: 16px; padding: .8rem 1rem; animation: badgeIn .4s ease both;
}
.badge:nth-child(2) { animation-delay: .15s; } .badge:nth-child(3) { animation-delay: .3s; } .badge:nth-child(4) { animation-delay: .45s; } .badge:nth-child(n+5) { animation-delay: .6s; }
@keyframes badgeIn { from { opacity: 0; transform: translateX(-12px) scale(.96); } to { opacity: 1; transform: none; } }
.badge-icon { font-size: 2rem; line-height: 1; background: var(--stamp); border-radius: 12px; padding: .35rem .4rem; }
.badge b { display: block; font-family: var(--font-display); font-size: 1.15rem; font-weight: 600; }
.badge span { color: #C9D6EA; font-size: .9rem; font-weight: 700; }
.missed { list-style: none; padding: 0; margin: 0; display: grid; gap: .4rem; }
.missed li { background: var(--paper); border-left: 5px solid var(--bad); border-radius: 12px; padding: .6rem .9rem; display: flex; justify-content: space-between; gap: .5rem; font-weight: 700; }
.missed li span:last-child { color: var(--navy-2); }

/* done */
.done { text-align: center; padding: 1rem 0; }
.done-icon { font-size: 3.5rem; }

/* leaderboard */
.tabs { display: flex; gap: .4rem; background: rgba(28,43,74,.08); padding: .3rem; border-radius: 14px; }
.tab { flex: 1; border: 0; background: transparent; padding: .6rem .3rem; border-radius: 11px; font-weight: 800; color: var(--navy-2); font-size: .9rem; }
.tab.active { background: var(--paper); color: var(--navy); box-shadow: 0 2px 8px rgba(28,43,74,.1); }
.table { background: var(--paper); border-radius: 16px; box-shadow: var(--shadow); overflow: hidden; }
.row { display: grid; grid-template-columns: 2.2rem 1fr auto auto auto; gap: .6rem; align-items: center; padding: .7rem .9rem; border-top: 1px solid var(--line); font-weight: 700; }
.row:first-child { border-top: 0; }
.row.head { color: var(--muted); font-size: .8rem; font-weight: 800; background: var(--sky); }
.row.me { background: #FFF8E1; }
.row .pos { font-family: var(--font-display); color: var(--navy-2); font-weight: 600; }
.row .name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.row .pct { font-family: var(--font-display); font-weight: 600; color: var(--navy); min-width: 3.2rem; text-align: right; }
.row .time { color: var(--muted); font-variant-numeric: tabular-nums; }
.row .date { color: var(--muted); font-size: .8rem; }
#lb-top .row:nth-child(2) .pos::before { content: "🥇 "; } #lb-top .row:nth-child(3) .pos::before { content: "🥈 "; } #lb-top .row:nth-child(4) .pos::before { content: "🥉 "; }
.empty { padding: 1.2rem 1rem; text-align: center; color: var(--muted); font-weight: 700; }

/* toast */
.toast {
  position: fixed; left: 50%; bottom: calc(1.4rem + env(safe-area-inset-bottom, 0)); transform: translateX(-50%);
  background: var(--navy); color: #fff; font-weight: 800; padding: .7rem 1.1rem; border-radius: 999px;
  box-shadow: var(--shadow); z-index: 9; animation: pop .25s ease both;
}