:root {
  --bg: #f5f7fa;
  --card: #ffffff;
  --ink: #263238;
  --muted: #6b7785;
  --line: #dde3ea;
  --accent: #3f6fb5;
  --accent-soft: #e8effa;
  --accent-line: #c9d8ef;
  --ok: #2e8b6a;
  --ok-soft: #e6f4ee;
  --ko: #c0563f;
  --ko-soft: #fbece8;
  box-sizing: border-box;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
*, *::before, *::after { box-sizing: inherit; }

body {
  margin: 0; min-height: 100vh; background: var(--bg); color: var(--ink);
  font-family: "Fredoka", "Trebuchet MS", "Segoe UI", sans-serif;
}
.app { max-width: 600px; margin: 0 auto; padding: 24px 16px 40px; }
[hidden] { display: none !important; }

.top { text-align: center; margin-bottom: 18px; }
.top h1 { margin: 0; font-size: clamp(1.4rem, 5vw, 1.9rem); font-weight: 600; color: var(--accent); }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 20px;
  padding: clamp(18px, 5vw, 30px); box-shadow: 0 2px 10px rgba(38, 50, 56, .06);
}
.hello { font-size: 1.15rem; font-weight: 500; margin: 0 0 18px; text-align: center; }

/* Formulaire */
.field { display: block; margin-bottom: 18px; }
.field > span { display: block; font-weight: 500; margin-bottom: 8px; }
.field em { font-weight: 400; color: var(--muted); }
.req { color: var(--muted); font-weight: 400; }
input[type="text"], input[type="email"] {
  width: 100%; font: inherit; font-size: 1.1rem; padding: 11px 14px;
  border: 2px solid var(--line); border-radius: 12px; background: #fff; color: var(--ink);
}
input:focus-visible, button:focus-visible { outline: 3px solid var(--accent-line); outline-offset: 2px; border-color: var(--accent); }

.chips { display: grid; grid-template-columns: repeat(auto-fill, minmax(58px, 1fr)); gap: 8px; }
.chip {
  font: inherit; font-size: 1.15rem; font-weight: 500; padding: 9px 0; cursor: pointer;
  border: 2px solid var(--line); background: #fff; color: var(--ink); border-radius: 12px;
  transition: background .12s, border-color .12s, color .12s;
}
.chip:hover { border-color: var(--accent); }
.chip[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }

.link-btn { margin-top: 8px; background: none; border: 0; padding: 0; font: inherit; font-size: .92rem; color: var(--accent); text-decoration: underline; cursor: pointer; }
.forget { margin: -8px 0 18px; color: var(--muted); }
.error { color: var(--ko); font-weight: 500; margin: 0 0 12px; }

/* Boutons */
.btn {
  font: inherit; font-size: 1.15rem; font-weight: 500; border: 2px solid var(--accent);
  padding: 12px 24px; border-radius: 14px; cursor: pointer; width: 100%;
  transition: background .12s, transform .08s;
}
.btn:active { transform: translateY(1px); }
.btn-main { background: var(--accent); color: #fff; }
.btn-main:hover { background: #345f9f; }
.btn-alt { background: #fff; color: var(--accent); }
.btn-alt:hover { background: var(--accent-soft); }
.end-actions { display: grid; gap: 12px; }

/* Quiz */
.quiz-head { display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-weight: 500; margin-bottom: 10px; }
.level { background: var(--accent-soft); color: var(--accent); padding: 3px 12px; border-radius: 999px; font-size: .95rem; }
.progress { height: 8px; background: var(--line); border-radius: 999px; overflow: hidden; margin-bottom: 26px; }
#bar { height: 100%; width: 0; background: var(--accent); border-radius: 999px; transition: width .3s; }

.equation { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: clamp(6px, 2vw, 12px); margin-bottom: 22px; }
.tile, .blank input {
  width: clamp(56px, 16vw, 86px); height: clamp(64px, 18vw, 94px);
  display: flex; align-items: center; justify-content: center;
  font-size: clamp(1.9rem, 8vw, 3rem); font-weight: 600; border-radius: 16px;
}
.tile { background: var(--accent-soft); color: var(--accent); border: 2px solid var(--accent-line); }
.symbol { font-size: clamp(1.8rem, 7vw, 2.6rem); font-weight: 500; color: var(--muted); }
.blank input {
  width: clamp(74px, 21vw, 108px); text-align: center; font-family: inherit; color: var(--ink);
  background: #fff; border: 2px dashed var(--accent);
}
.blank input:disabled { border-style: solid; opacity: 1; -webkit-text-fill-color: currentColor; }
.blank.good input { background: var(--ok-soft); border-color: var(--ok); color: var(--ok); }
.blank.bad input { background: var(--ko-soft); border-color: var(--ko); color: var(--ko); }

.feedback { border-radius: 14px; padding: 12px 16px; text-align: center; margin-bottom: 18px; border: 2px solid; }
.feedback p { margin: 0; }
.feedback.good { background: var(--ok-soft); border-color: var(--ok); }
.feedback.bad { background: var(--ko-soft); border-color: var(--ko); }
#feedback-title { font-size: 1.15rem; font-weight: 600; }
.feedback-eq { font-size: 1.4rem; font-weight: 500; margin-top: 4px !important; }
.hint { text-align: center; color: var(--muted); font-size: .88rem; margin: 12px 0 0; }

/* Résultats */
.score-ring {
  width: 170px; height: 170px; margin: 0 auto 10px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; position: relative;
  background: conic-gradient(var(--accent) calc(var(--p, 0) * 1%), var(--line) 0);
}
.score-ring::before { content: ""; position: absolute; inset: 14px; background: var(--card); border-radius: 50%; }
.score-ring span { position: relative; font-size: 2.6rem; font-weight: 600; color: var(--accent); }
.stars { text-align: center; font-size: 1.8rem; margin: 0; letter-spacing: 4px; }
.score-text { text-align: center; font-size: 1.15rem; font-weight: 500; margin: 8px 0 14px; }
.mail-status { text-align: center; min-height: 1.4em; color: var(--muted); font-size: .95rem; margin-bottom: 18px; }

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