:root {
  --bg: #f4f5f7; --card: #fff; --ink: #14181f; --muted: #667085; --line: #e3e6eb;
  --brand: #2f5bea; --brand-ink: #fff; --ok: #12805c; --ok-bg: #e3f5ee; --ko: #c23a2b; --ko-bg: #fde9e6;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1216; --card: #191d24; --ink: #eef0f3; --muted: #98a2b3; --line: #2a303a; --brand: #6d8cff; --brand-ink: #0b1020; --ok: #4fd1a5; --ok-bg: #12312a; --ko: #ff8a7a; --ko-bg: #3a1b18; }
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.45 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; }
main { max-width: 560px; margin: 0 auto; padding: calc(12px + env(safe-area-inset-top)) 14px 96px; }
header { display: flex; align-items: center; justify-content: space-between; margin: 8px 2px 12px; }
h1 { font-size: 26px; margin: 0; letter-spacing: -.02em; }
h2 { font-size: 16px; margin: 0 0 8px; }
p { margin: 8px 0; }
ul { margin: 10px 0 0; padding-left: 18px; color: var(--muted); font-size: 14px; }
.muted { color: var(--muted); } .small { font-size: 13px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 16px; margin-bottom: 12px; }
.hero { margin-top: 12vh; text-align: center; } .hero h1 { font-size: 34px; margin-bottom: 8px; }
.split { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.row { display: flex; gap: 8px; } .row .btn { flex: 1; }
.row-line { padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 15px; } .row-line:last-child { border: 0; }
.chip { background: var(--bg); border: 1px solid var(--line); border-radius: 99px; padding: 4px 10px; font-size: 13px; white-space: nowrap; color: var(--ink); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; } .tap { cursor: pointer; font: inherit; font-size: 14px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); text-align: center; }
.grid3 b { display: block; font-size: 22px; } .grid3 span { font-size: 13px; color: var(--muted); }
.bar { height: 10px; background: var(--line); border-radius: 99px; overflow: hidden; margin: 10px 0; flex: 1; }
.bar.thin { height: 6px; } .bar i { display: block; height: 100%; background: var(--brand); border-radius: 99px; transition: width .3s; }
.skill { margin-bottom: 6px; }
.stage.next { opacity: .7; } .stage.done .bar i { background: var(--ok); }
.btn { display: block; width: 100%; min-height: 48px; margin-top: 8px; padding: 10px 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--card); color: var(--ink); font: inherit; font-weight: 600; text-align: center; cursor: pointer; }
.btn.primary { background: var(--brand); color: var(--brand-ink); border-color: transparent; } .btn.big { min-height: 54px; font-size: 17px; }
.btn.ghost { border-color: transparent; color: var(--brand); } .btn.danger { color: var(--ko); }
.btn:disabled { opacity: .5; } .btn:active:not(:disabled) { transform: scale(.985); }
.link { background: none; border: 0; font: inherit; cursor: pointer; padding: 0 4px; }
label { display: block; font-size: 14px; color: var(--muted); margin-top: 10px; }
label.check { display: flex; gap: 8px; align-items: center; color: var(--ink); }
select, input:not([type=checkbox]) { display: block; width: 100%; min-height: 46px; margin-top: 6px; padding: 8px 12px; border-radius: 12px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); font: inherit; }
nav { position: fixed; left: 0; right: 0; bottom: 0; display: flex; background: var(--card); border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom); }
nav button { flex: 1; background: none; border: 0; padding: 8px 0 10px; font: inherit; font-size: 12px; color: var(--muted); cursor: pointer; }
nav button span { display: block; font-size: 20px; } nav button.on { color: var(--brand); font-weight: 700; }
.top { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.x { background: none; border: 0; font-size: 20px; color: var(--muted); min-width: 44px; min-height: 44px; cursor: pointer; }
.tag { font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--brand); margin-bottom: 6px; }
.phrase { font-size: 22px; font-weight: 650; line-height: 1.35; margin: 10px 0; }
.phrase .ok { color: var(--ok); } .phrase .ko { color: var(--ko); text-decoration: underline wavy; text-underline-offset: 4px; }
.fb { border-radius: 12px; padding: 12px; margin-top: 12px; font-size: 15px; } .fb.good { background: var(--ok-bg); color: var(--ok); } .fb.bad { background: var(--ko-bg); color: var(--ko); }
.answer { min-height: 64px; border-bottom: 2px dashed var(--line); padding: 8px 0; margin: 10px 0; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.tiles { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 6px; }
.tile { min-height: 44px; padding: 8px 14px; border-radius: 10px; border: 1px solid var(--line); border-bottom-width: 3px; background: var(--card); color: var(--ink); font: inherit; font-size: 17px; cursor: pointer; }
.tile:disabled { opacity: .25; }
.opts { display: grid; gap: 8px; margin-top: 12px; }
.opt { min-height: 52px; padding: 10px 14px; border-radius: 12px; border: 1px solid var(--line); border-bottom-width: 3px; background: var(--card); color: var(--ink); font: inherit; font-size: 17px; text-align: left; cursor: pointer; }
.opt.ok { background: var(--ok-bg); border-color: var(--ok); color: var(--ok); } .opt.ko { background: var(--ko-bg); border-color: var(--ko); color: var(--ko); }