/* ===================== LUCY — design moderne ===================== */
.lucy-app {
    --bg:      #f5f6fc;
    --card:    #ffffff;
    --card-bd: #e8eaf4;
    --txt:     #181a2c;
    --muted:   #757a92;
    --violet:  #7c3aed;
    --blue:    #2563eb;
    --indigo:  #6366f1;
    --pink:    #ec4899;
    --green:   #16a34a;
    --red:     #e11d48;
    --amber:   #d97706;
    --grad:    linear-gradient(120deg, #7c3aed, #2563eb);
    --grad-pink: linear-gradient(120deg, #ec4899, #7c3aed);
    --shadow:  0 14px 40px rgba(76,70,160,.12);
    --shadow-sm: 0 4px 14px rgba(76,70,160,.08);

    position: relative;
    box-sizing: border-box;
    width: 100%;
    max-width: 880px;
    margin: 0 auto;
    padding: 0;
    color: var(--txt);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, system-ui, sans-serif;
    -webkit-font-smoothing: antialiased;
    background:
        radial-gradient(700px 380px at 0% -8%, #e9f0ff 0%, transparent 60%),
        radial-gradient(720px 420px at 100% 0%, #f3e9ff 0%, transparent 58%),
        linear-gradient(180deg, #fbfbfe 0%, #f5f6fc 100%);
    border: 1px solid #ececf6;
    border-radius: 26px;
    box-shadow: var(--shadow);
    overflow: hidden;
}
.lucy-app *, .lucy-app *::before, .lucy-app *::after { box-sizing: border-box; }
.lucy-app button { font-family: inherit; cursor: pointer; -webkit-tap-highlight-color: transparent; }

/* ---- MODE IMMERSIF (plein écran qui marche aussi sur mobile) ---- */
html.lucy-fs-lock, html.lucy-fs-lock body { overflow: hidden; }
.lucy-app.lucy-fs {
    position: fixed; inset: 0; z-index: 99990;
    width: 100vw; height: 100vh; height: 100dvh; max-width: none;
    margin: 0; border: 0; border-radius: 0;
    overflow-y: auto; -webkit-overflow-scrolling: touch;
}
.lucy-app.lucy-fs .lucy-screen,
.lucy-app.lucy-fs .lucy-flash-wrap,
.lucy-app.lucy-fs .lucy-dico-wrap,
.lucy-app.lucy-fs .lucy-ov-wrap { max-width: 760px; margin-left: auto; margin-right: auto; }
.lucy-fs-exit {
    position: fixed; top: 14px; right: 14px; z-index: 100000; display: none;
    width: 42px; height: 42px; align-items: center; justify-content: center;
    border: none; border-radius: 50%; font-size: 20px; color: #fff;
    background: rgba(24,26,44,.78); backdrop-filter: blur(6px);
    box-shadow: 0 6px 18px rgba(0,0,0,.3);
}
.lucy-fs-exit:hover { background: rgba(24,26,44,.95); }

/* ---- BOOT ---- */
.lucy-boot { text-align: center; padding: 110px 20px; }
.lucy-boot-logo {
    font-size: 52px; font-weight: 900; letter-spacing: -.03em;
    background: var(--grad-pink); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lucy-boot-sub { color: var(--muted); margin-top: 6px; }

/* ---- SCREENS ---- */
.lucy-screen { padding: 24px 20px 30px; animation: lucy-fade .28s ease; }
@keyframes lucy-fade { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
@keyframes lucy-pop { from { opacity: 0; transform: scale(.97); } to { opacity: 1; transform: none; } }

/* ---- TOP BAR ---- */
.lucy-topbar { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.lucy-back {
    background: var(--card); border: 1px solid var(--card-bd); color: var(--txt);
    border-radius: 999px; padding: 9px 16px; font-size: 14px; font-weight: 600;
    box-shadow: var(--shadow-sm); transition: transform .15s, background .15s;
}
.lucy-back:hover { background: #f3f4fd; transform: translateX(-2px); }
.lucy-topbar-title { font-size: 18px; font-weight: 800; letter-spacing: -.01em; }
.lucy-topbar-spacer { flex: 1; }
.lucy-chip-lvl {
    font-size: 12px; font-weight: 700; padding: 5px 13px; border-radius: 999px;
    background: var(--grad); color: #fff; box-shadow: 0 4px 12px rgba(99,102,241,.35);
}

/* ---- HOME ---- */
.lucy-hero { text-align: center; padding: 38px 12px 24px; }
.lucy-hero h1 {
    margin: 0; font-size: 52px; font-weight: 900; letter-spacing: -.04em; line-height: 1;
    background: linear-gradient(100deg, #ec4899, #7c3aed 48%, #2563eb);
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lucy-hero p { color: var(--muted); margin: 14px 0 0; font-size: 15px; line-height: 1.5; }
.lucy-hero .lucy-total { color: var(--txt); font-weight: 800; }

.lucy-levels { display: flex; flex-direction: column; gap: 14px; padding: 8px 2px 4px; }
.lucy-level-btn {
    position: relative; display: flex; align-items: center; gap: 16px;
    width: 100%; text-align: left; border: none; border-radius: 20px;
    padding: 20px 22px; color: #fff; overflow: hidden;
    box-shadow: 0 12px 28px rgba(40,40,90,.18);
    transition: transform .18s, box-shadow .18s;
}
.lucy-level-btn::after {
    content: ""; position: absolute; inset: 0;
    background: radial-gradient(420px 120px at 90% -40%, rgba(255,255,255,.35), transparent 60%);
    pointer-events: none;
}
.lucy-level-btn:hover { transform: translateY(-3px); box-shadow: 0 20px 40px rgba(40,40,90,.28); }
.lucy-level-btn:active { transform: translateY(-1px); }
.lucy-level-btn .lucy-lv-emoji {
    font-size: 28px; flex: 0 0 auto; width: 56px; height: 56px; border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(255,255,255,.22); box-shadow: inset 0 0 0 1px rgba(255,255,255,.25);
}
.lucy-level-btn .lucy-lv-main { flex: 1; }
.lucy-level-btn .lucy-lv-name { font-size: 21px; font-weight: 800; letter-spacing: -.01em; }
.lucy-level-btn .lucy-lv-desc { font-size: 12.5px; opacity: .92; margin-top: 3px; }
.lucy-level-btn .lucy-lv-count {
    font-size: 12.5px; font-weight: 700; background: rgba(255,255,255,.2);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,.22);
    padding: 7px 13px; border-radius: 999px; flex: 0 0 auto;
}
.lucy-lv-0 { background: linear-gradient(120deg, #06b6d4, #3b82f6); }
.lucy-lv-1 { background: linear-gradient(120deg, #8b5cf6, #d946ef); }
.lucy-lv-2 { background: linear-gradient(120deg, #fb7185, #f59e0b); }
.lucy-lv-all { background: linear-gradient(120deg, #334155, #4338ca); }

/* ---- HUB ---- */
.lucy-section-label { font-size: 11.5px; font-weight: 800; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin: 20px 2px 10px; }
.lucy-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.lucy-chip {
    background: var(--card); border: 1px solid var(--card-bd); color: var(--txt);
    border-radius: 999px; padding: 8px 15px; font-size: 13px; font-weight: 600;
    box-shadow: var(--shadow-sm); transition: all .15s;
}
.lucy-chip:hover { border-color: #cdd2f2; transform: translateY(-1px); }
.lucy-chip.active { background: var(--grad); border-color: transparent; color: #fff; box-shadow: 0 6px 16px rgba(99,102,241,.32); }
.lucy-chip .lucy-chip-n { opacity: .65; margin-left: 6px; font-weight: 800; }
.lucy-chip.active .lucy-chip-n { opacity: .85; }

.lucy-modes { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
.lucy-mode-btn {
    position: relative; background: var(--card); border: 1px solid var(--card-bd); color: var(--txt);
    border-radius: 20px; padding: 18px 16px 16px; text-align: left;
    box-shadow: var(--shadow-sm); transition: transform .16s, box-shadow .16s, border-color .16s;
}
.lucy-mode-btn:hover { transform: translateY(-3px); border-color: #d7daf3; box-shadow: 0 14px 30px rgba(76,70,160,.14); }
.lucy-mode-btn .lucy-mode-emoji {
    display: inline-flex; align-items: center; justify-content: center;
    width: 48px; height: 48px; border-radius: 14px; font-size: 24px;
    background: linear-gradient(135deg, #f1ecff, #e6efff);
    box-shadow: inset 0 0 0 1px #e7e3ff;
}
.lucy-mode-btn .lucy-mode-name { font-weight: 800; font-size: 15.5px; margin-top: 11px; letter-spacing: -.01em; }
.lucy-mode-btn .lucy-mode-desc { font-size: 12px; color: var(--muted); margin-top: 4px; line-height: 1.45; }
.lucy-mode-btn.lucy-mode-feature {
    grid-column: 1 / -1; color: #fff; border: none;
    background: linear-gradient(120deg, #7c3aed, #4f46e5 55%, #2563eb);
    box-shadow: 0 14px 34px rgba(99,102,241,.35);
}
.lucy-mode-btn.lucy-mode-feature .lucy-mode-emoji { background: rgba(255,255,255,.18); box-shadow: inset 0 0 0 1px rgba(255,255,255,.25); }
.lucy-mode-btn.lucy-mode-feature .lucy-mode-desc { color: rgba(255,255,255,.9); }

/* ---- DURATION PICKER ---- */
.lucy-duration { text-align: center; padding: 22px 0; }
.lucy-duration h3 { font-size: 21px; font-weight: 800; margin: 0 0 4px; }
.lucy-duration p { color: var(--muted); font-size: 14px; margin: 0 0 18px; }
.lucy-dur-grid { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 22px; }
.lucy-dur-btn {
    background: var(--card); border: 1px solid var(--card-bd); color: var(--txt);
    border-radius: 14px; padding: 13px 20px; font-size: 15px; font-weight: 700; min-width: 84px;
    box-shadow: var(--shadow-sm); transition: all .15s;
}
.lucy-dur-btn:hover { border-color: #cdd2f2; transform: translateY(-2px); }
.lucy-dur-btn.active { background: var(--grad); border-color: transparent; color: #fff; box-shadow: 0 8px 20px rgba(99,102,241,.32); }
.lucy-start-btn {
    background: var(--grad-pink); border: none; color: #fff;
    border-radius: 999px; padding: 15px 44px; font-size: 17px; font-weight: 800;
    box-shadow: 0 12px 30px rgba(124,58,237,.4); transition: transform .15s;
}
.lucy-start-btn:hover { transform: scale(1.04); }

/* ---- FEED ---- */
.lucy-feed-head { display: flex; align-items: center; gap: 12px; padding: 14px 20px; border-bottom: 1px solid var(--card-bd); }
.lucy-timer { font-variant-numeric: tabular-nums; font-weight: 800; font-size: 18px; }
.lucy-timer.warn { color: var(--amber); }
.lucy-feed-stat { color: var(--muted); font-size: 13px; font-weight: 600; }
.lucy-feed { height: 74vh; max-height: 720px; overflow-y: scroll; scroll-snap-type: y mandatory; scrollbar-width: none; }
.lucy-feed::-webkit-scrollbar { display: none; }
.lucy-slide { scroll-snap-align: start; height: 74vh; max-height: 720px; display: flex; align-items: center; justify-content: center; padding: 18px; }

/* ---- CARTES (slide + flash) ---- */
.lucy-slide-card, .lucy-flash-card {
    width: 100%; max-width: 640px; border-radius: 22px;
    background: #ffffff; color: #161826; border: 1px solid #eef0f8;
    padding: 26px 26px; display: flex; flex-direction: column;
    box-shadow: 0 18px 48px rgba(60,55,130,.16); position: relative; cursor: pointer;
    animation: lucy-pop .25s ease; transition: transform .15s;
}
.lucy-slide-card { min-height: 60%; }
.lucy-slide-card:active, .lucy-flash-card:active { transform: scale(.995); }
.lucy-slide-badges, .lucy-flash-card .lucy-slide-badges { display: flex; gap: 7px; flex-wrap: wrap; margin-bottom: 16px; }
.lucy-badge { font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .04em; padding: 5px 11px; border-radius: 999px; }
.lucy-badge.dom { background: #e7eeff; color: #1d4ed8; }
.lucy-badge.cat { background: #fde7f1; color: #be1e6a; }
.lucy-badge.lvl { background: #e6f8ee; color: #15803d; }
.lucy-slide-term { font-size: 28px; font-weight: 900; line-height: 1.22; color: #111327; letter-spacing: -.015em; }
.lucy-slide-hint { color: #8a90a6; font-size: 14px; font-weight: 600; margin-top: auto; padding-top: 20px; }
.lucy-slide-card.revealed .lucy-slide-hint, .lucy-flash-card.revealed .lucy-slide-hint { display: none; }

/* ---- FICHE structurée ---- */
.lucy-fiche { display: none; margin-top: 18px; }
.lucy-slide-card.revealed .lucy-fiche, .lucy-flash-card.revealed .lucy-fiche { display: block; animation: lucy-fade .25s ease; }
.lucy-fiche-label { font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .09em; color: var(--violet); margin-bottom: 7px; }
.lucy-fiche-def {
    position: relative; background: linear-gradient(135deg, #ffffff, #f3f1ff);
    border: 1px solid #ebe7fb; border-radius: 16px; padding: 16px 18px 16px 20px; margin-bottom: 16px;
}
.lucy-fiche-def::before { content: ""; position: absolute; left: 0; top: 10px; bottom: 10px; width: 4px; border-radius: 4px; background: var(--grad); }
.lucy-fiche-def-txt { font-size: 17px; line-height: 1.6; font-weight: 600; color: #1c1e30; white-space: pre-wrap; }
.lucy-fiche-formula-wrap { margin-bottom: 16px; }
.lucy-fiche-formula {
    background: linear-gradient(135deg, #f6f7fd, #eef1fb); border: 1px solid #e6e9f5; border-radius: 14px;
    padding: 16px 14px; text-align: center; font-size: 19px; color: #14162b; overflow-x: auto;
}
.lucy-fiche-sec { margin-bottom: 14px; }
.lucy-fiche-txt { font-size: 16px; line-height: 1.62; color: #2c2f45; white-space: pre-wrap; }
.lucy-fiche-txt.lucy-ex {
    background: #f4f7fd; border: 1px solid #e4ecf8; border-left: 4px solid var(--blue);
    border-radius: 12px; padding: 12px 15px; color: #2b3050;
}
.lucy-fiche-img { margin-top: 10px; max-width: 100%; border-radius: 14px; border: 1px solid #e9ecf6; background: #fff; padding: 6px; }

/* ---- Formules en ENCADRÉ ROUGE, bien séparées (essentiel) ---- */
.lucy-formula-box {
    background: linear-gradient(180deg, #fff6f6, #ffeded);
    border: 1.5px solid #f3b1b1; border-left: 5px solid #e11d48;
    border-radius: 13px; padding: 14px 16px; margin-bottom: 11px;
    text-align: center; overflow-x: auto;
    box-shadow: 0 4px 14px rgba(225,29,72,.10);
}
.lucy-formula-box:last-of-type { margin-bottom: 0; }
.lucy-formula-box .katex { color: #c81e3a; font-size: 1.12em; }
.lucy-fiche-units { margin-top: 10px; font-size: 12.5px; color: #5a5f76; line-height: 1.65; }
.lucy-units-tag {
    display: inline-block; font-size: 10.5px; font-weight: 800; text-transform: uppercase; letter-spacing: .07em;
    color: #b91c1c; background: #fde7ea; border: 1px solid #f6c6cd; border-radius: 999px;
    padding: 2px 9px; margin-right: 6px;
}

/* ---- L'ESSENTIEL : présentation aérée ---- */
.lucy-fiche-mode-essentiel .lucy-fiche-def { padding: 18px 20px 18px 22px; margin-bottom: 22px; }
.lucy-fiche-mode-essentiel .lucy-fiche-def-txt { font-size: 16.5px; line-height: 1.85; font-weight: 600; }
.lucy-fiche-mode-essentiel .lucy-fiche-formula-wrap { margin-bottom: 22px; }
.lucy-fiche-mode-essentiel .lucy-fiche-formula { padding: 20px 16px; }
.lucy-fiche-mode-essentiel .lucy-fiche-sec { margin-bottom: 22px; }
.lucy-fiche-mode-essentiel .lucy-fiche-txt { font-size: 16px; line-height: 1.9; }

/* ---- QUESTIONS : réponse aérée ---- */
.lucy-fiche-mode-question .lucy-fiche-def { padding: 18px 20px 18px 22px; }
.lucy-fiche-mode-question .lucy-fiche-def-txt { font-size: 17px; line-height: 1.9; }
.lucy-fiche-mode-question .lucy-fiche-sec { margin-top: 16px; }
.lucy-fiche-mode-question .lucy-fiche-txt { line-height: 1.85; }

/* ---- FLASHCARDS ---- */
.lucy-flash-wrap { padding: 20px 18px; }
.lucy-flash-card { min-height: 240px; }
.lucy-flash-actions { display: flex; gap: 10px; margin-top: 18px; justify-content: center; align-items: center; }
.lucy-flash-counter { text-align: center; color: var(--muted); font-size: 13px; font-weight: 600; margin-top: 12px; }

/* ---- QCM ---- */
.lucy-qcm-wrap { padding: 22px; }
.lucy-qcm-term { font-size: 25px; font-weight: 800; line-height: 1.25; margin-bottom: 18px; }
.lucy-qcm-choices { display: flex; flex-direction: column; gap: 11px; }
.lucy-qcm-choice { text-align: left; background: var(--card); border: 2px solid var(--card-bd); color: var(--txt); border-radius: 14px; padding: 15px 17px; font-size: 16px; line-height: 1.55; white-space: pre-wrap; transition: all .15s; }
.lucy-qcm-choice:hover:not(:disabled) { border-color: var(--blue); background: rgba(37,99,235,.08); }
.lucy-qcm-choice.correct { border-color: var(--green); background: rgba(34,197,94,.14); }
.lucy-qcm-choice.wrong { border-color: var(--red); background: rgba(244,63,94,.14); }
.lucy-qcm-choice:disabled { cursor: default; }

/* ---- DICTIONNAIRE ---- */
.lucy-dico-wrap { padding: 20px 18px; }
.lucy-search { width: 100%; padding: 14px 16px; font-size: 15px; border-radius: 14px; border: 1px solid var(--card-bd); background: var(--card); color: var(--txt); margin-bottom: 8px; box-shadow: var(--shadow-sm); }
.lucy-search:focus { outline: none; border-color: var(--indigo); box-shadow: 0 0 0 3px rgba(99,102,241,.15); }
.lucy-search::placeholder { color: var(--muted); }
.lucy-dico-count { color: var(--muted); font-size: 13px; margin-bottom: 14px; }
.lucy-dico-dom-title { font-size: 18px; font-weight: 800; margin: 18px 0 8px; text-transform: capitalize; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lucy-dico-cat-title { font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; color: var(--pink); margin: 14px 0 6px; }
.lucy-dico-entry { border: 1px solid var(--card-bd); background: var(--card); border-radius: 14px; margin-bottom: 7px; overflow: hidden; box-shadow: var(--shadow-sm); }
.lucy-dico-term { display: flex; align-items: center; gap: 10px; padding: 14px 16px; cursor: pointer; font-weight: 700; font-size: 16px; }
.lucy-dico-term:hover { background: #f5f6fe; }
.lucy-dico-chev { margin-left: auto; color: var(--muted); transition: transform .2s; }
.lucy-dico-entry.open .lucy-dico-chev { transform: rotate(90deg); }
.lucy-dico-def { display: none; padding: 0 16px 15px; font-size: 15.5px; line-height: 1.62; color: #353a52; white-space: pre-wrap; }
.lucy-dico-formula { margin: 8px 16px 4px; background: #f4f6fd; border:1px solid #e6e9f3; border-radius: 10px; padding: 9px; text-align: center; }
.lucy-dico-entry .lucy-dico-formula { display: none; }
.lucy-dico-entry.open .lucy-dico-formula, .lucy-dico-entry.open .lucy-dico-def { display: block; }

/* ---- VUE D'ENSEMBLE ---- */
.lucy-ov-wrap { padding: 20px 18px; }
.lucy-ov-cat { margin-bottom: 20px; }
.lucy-ov-cat h4 { font-size: 14px; font-weight: 800; margin: 0 0 4px; }
.lucy-ov-cat .lucy-ov-meta { color: var(--muted); font-size: 12px; margin-bottom: 8px; }
.lucy-ov-terms { display: flex; flex-wrap: wrap; gap: 6px; }
.lucy-ov-term { background: var(--card); border: 1px solid var(--card-bd); border-radius: 999px; padding: 6px 13px; font-size: 12.5px; box-shadow: var(--shadow-sm); }

/* ---- RECAP ---- */
.lucy-recap { text-align: center; padding: 50px 24px; }
.lucy-recap .lucy-recap-big { font-size: 58px; font-weight: 900; background: var(--grad-pink); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lucy-recap p { color: var(--muted); font-size: 15px; margin: 6px 0 22px; }
.lucy-recap-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

/* ---- BTNS génériques ---- */
.lucy-btn { border-radius: 999px; padding: 12px 24px; font-size: 14px; font-weight: 700; border: none; transition: transform .14s, box-shadow .14s, opacity .14s; }
.lucy-btn:hover { transform: translateY(-2px); }
.lucy-btn-primary { background: var(--grad); color: #fff; box-shadow: 0 8px 22px rgba(99,102,241,.35); }
.lucy-btn-ghost { background: var(--card); border: 1px solid var(--card-bd); color: var(--txt); box-shadow: var(--shadow-sm); }
.lucy-btn-green { background: linear-gradient(120deg, #16a34a, #22c55e); color: #fff; box-shadow: 0 8px 22px rgba(22,163,74,.32); }
.lucy-empty { color: var(--muted); text-align: center; padding: 44px; }

/* ---- ÉDITION (bouton + modal) ---- */
.lucy-edit-btn { margin-top: 16px; align-self: flex-start; background: #f0f1f8; color: #6c7286; border: 1px solid #e3e5f1; border-radius: 999px; padding: 7px 14px; font-size: 12.5px; font-weight: 700; transition: all .15s; }
.lucy-edit-btn:hover { background: #e9eaf6; color: #3b3f57; }
.lucy-modal { position: fixed; inset: 0; z-index: 100001; background: rgba(20,22,40,.55); backdrop-filter: blur(4px); display: flex; align-items: center; justify-content: center; padding: 20px; }
.lucy-modal-box { background: #fff; color: #1d2033; border-radius: 20px; padding: 24px; width: 100%; max-width: 400px; box-shadow: 0 30px 70px rgba(0,0,0,.4); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
.lucy-modal-title { font-size: 18px; font-weight: 800; margin-bottom: 14px; }
.lucy-pw-input { width: 100%; box-sizing: border-box; padding: 12px 14px; font-size: 15px; border: 1px solid #d7dbe9; border-radius: 12px; margin-bottom: 8px; }
.lucy-pw-input:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(37,99,235,.15); }
.lucy-pw-msg { font-size: 13px; color: var(--red); min-height: 18px; margin-bottom: 8px; }
.lucy-modal-actions { display: flex; gap: 10px; justify-content: flex-end; }
.lucy-edit-form { margin-top: 6px; }
.lucy-edit-field { margin-bottom: 12px; }
.lucy-edit-ta { width: 100%; box-sizing: border-box; margin-top: 4px; padding: 10px 12px; font-size: 15px; line-height: 1.5; border: 1px solid #d7dbe9; border-radius: 12px; resize: vertical; font-family: inherit; color: #1d2033; background: #fff; }
.lucy-edit-ta:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(37,99,235,.12); }

/* ---- Fiche EXO : encadré méthode (indigo) ---- */
.lucy-fiche-def.lucy-fiche-exo { background: linear-gradient(135deg, #f4f3ff, #e9edff); border-color: #dde1fb; }
.lucy-fiche-def.lucy-fiche-exo::before { background: linear-gradient(120deg, #6366f1, #3b82f6); }
.lucy-fiche-def.lucy-fiche-exo .lucy-fiche-label { color: #4338ca; }

/* ---- Sélecteur de chapitre (L'essentiel) ---- */
.lucy-chapter-nav { display: flex; align-items: center; gap: 10px; padding: 2px 20px 0; margin-bottom: 2px; }
.lucy-chapter-lab { font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); flex: 0 0 auto; }
.lucy-chapter-select {
    flex: 1; appearance: none; -webkit-appearance: none; font: inherit; font-size: 14px; font-weight: 700; color: var(--txt);
    padding: 12px 40px 12px 16px; border-radius: 14px; border: 1px solid var(--card-bd); cursor: pointer;
    background:
        url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path d='M1 1l5 5 5-5' fill='none' stroke='%237c3aed' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/></svg>") no-repeat right 15px center,
        linear-gradient(180deg, #ffffff, #f3f4fc);
    box-shadow: var(--shadow-sm), inset 0 1px 0 #fff;
    transition: border-color .15s, box-shadow .15s;
}
.lucy-chapter-select:focus { outline: none; border-color: var(--indigo); box-shadow: 0 0 0 3px rgba(99,102,241,.16); }

/* ---- Bouton "exercices types de ce chapitre" ---- */
.lucy-goexo { display: block; width: 100%; text-align: center; margin-top: 16px; }

/* ===================== BOUTONS : relief & dégradé ===================== */
.lucy-btn { position: relative; }
.lucy-btn:active { transform: translateY(1px); }
.lucy-btn-primary {
    background: linear-gradient(180deg, #8b5cf6, #6366f1 55%, #3b82f6);
    box-shadow: 0 9px 22px rgba(99,102,241,.42), inset 0 1px 0 rgba(255,255,255,.35);
}
.lucy-btn-primary:hover { box-shadow: 0 13px 28px rgba(99,102,241,.5), inset 0 1px 0 rgba(255,255,255,.4); }
.lucy-btn-ghost {
    background: linear-gradient(180deg, #ffffff, #eef0f9);
    box-shadow: 0 5px 14px rgba(76,70,160,.12), inset 0 1px 0 #fff;
}
.lucy-btn-ghost:hover { background: linear-gradient(180deg, #ffffff, #e7eaf6); border-color: #cdd2f2; }
.lucy-btn-green { background: linear-gradient(180deg, #22c55e, #16a34a); box-shadow: 0 9px 22px rgba(22,163,74,.4), inset 0 1px 0 rgba(255,255,255,.35); }
/* chips & boutons durée : léger relief */
.lucy-chip { background: linear-gradient(180deg, #ffffff, #f4f5fc); box-shadow: var(--shadow-sm), inset 0 1px 0 #fff; }
.lucy-dur-btn { background: linear-gradient(180deg, #ffffff, #f1f3fb); box-shadow: var(--shadow-sm), inset 0 1px 0 #fff; }
.lucy-dur-btn:active, .lucy-chip:active { transform: translateY(1px); }
.lucy-back { background: linear-gradient(180deg, #ffffff, #f1f3fb); box-shadow: var(--shadow-sm), inset 0 1px 0 #fff; }

/* ===================== RESPONSIVE (mobile) ===================== */
@media (max-width: 640px) {
    .lucy-app { border-radius: 18px; }
    .lucy-app.lucy-fs { border-radius: 0; }
    .lucy-screen { padding: 16px 13px 26px; }
    .lucy-hero { padding: 26px 6px 18px; }
    .lucy-hero h1 { font-size: 40px; }
    .lucy-hero p { font-size: 14px; }
    .lucy-levels { gap: 11px; }
    .lucy-level-btn { padding: 16px 16px; gap: 13px; border-radius: 18px; }
    .lucy-level-btn .lucy-lv-emoji { width: 48px; height: 48px; font-size: 24px; }
    .lucy-level-btn .lucy-lv-name { font-size: 18px; }
    .lucy-modes { grid-template-columns: 1fr 1fr; gap: 10px; }
    .lucy-mode-btn { padding: 14px 13px; border-radius: 17px; }
    .lucy-mode-btn .lucy-mode-emoji { width: 42px; height: 42px; font-size: 21px; }
    .lucy-mode-btn .lucy-mode-name { font-size: 14px; }
    .lucy-flash-wrap { padding: 12px 10px; }
    .lucy-slide { padding: 10px; }
    .lucy-slide-card, .lucy-flash-card { padding: 18px 16px; border-radius: 18px; }
    .lucy-slide-term { font-size: 22px; }
    .lucy-fiche-def-txt { font-size: 15.5px; }
    .lucy-fiche-mode-essentiel .lucy-fiche-def-txt,
    .lucy-fiche-mode-question .lucy-fiche-def-txt { font-size: 15.5px; }
    .lucy-fiche-txt { font-size: 15px; }
    .lucy-fiche-formula { font-size: 17px; padding: 13px 10px; }
    .lucy-btn { padding: 11px 18px; }
}
@media (max-width: 380px) {
    .lucy-modes { grid-template-columns: 1fr; }
    .lucy-hero h1 { font-size: 34px; }
}