/* Regles CSS strictement identiques (>=30/41 fiches riches), extraites automatiquement. */

:root {
    --blue: #2549d8;
    --blue-ink: #0f2266;
    --coral: #ff6a4d;
    --ink: #1c2340;
    --muted: #5a6178;
    --line: #e4e7f2;
    --green: #1f9d63;
    --red: #e0403f;
    --defbg: #eef2ff;
    --defborder: #2549d8;
    --methodbg: #eafaf1;
    --methodborder: #1f9d63;
    --realbg: #fff4ea;
    --realborder: #ff6a4d;
    --pitfallbg: #fdecec;
    --pitfallborder: #e0403f;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    height: 100%;
}

body {
    font-family: "Poppins", Helvetica, Arial, sans-serif;
    background: #eef0f7;
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--blue);
    text-decoration: none;
}

button {
    font-family: inherit;
}

.app {
    max-width: 640px;
    margin: 0 auto;
    min-height: 100vh;
    background: white;
    display: flex;
    flex-direction: column;
    box-shadow: 0 0 40px rgba(15, 34, 102, 0.08);
}

.step-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--muted);
}

.progress {
    display: flex;
    gap: 3px;
}

.progress .seg {
    flex: 1;
    height: 4px;
    border-radius: 3px;
    background: var(--line);
    overflow: hidden;
}

.progress .seg .fill {
    height: 100%;
    width: 0%;
    background: var(--coral);
    transition: width 0.4s ease;
}

.progress .seg.done .fill {
    width: 100%;
}

.progress .seg.current .fill {
    width: 100%;
}

.screen-wrap {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 26px 22px 100px;
    position: relative;
}

.screen.active {
    display: flex;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(14px);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

.chip.def {
    background: var(--defbg);
    color: var(--defborder);
}

.chip.method {
    background: var(--methodbg);
    color: var(--methodborder);
}

.chip.real {
    background: var(--realbg);
    color: var(--realborder);
}

.part-tag {
    font-size: 12px;
    font-weight: 700;
    color: var(--muted);
}

/* Corrections détaillées : accent violet dédié (distinct du quiz final) */
.calc-card.corr {
    background: #ece0ff;
    border: 1px solid #d9c4f7;
    border-left: 5px solid #7a3ff2;
}

.calc-card.corr .calc-label {
    color: #5f27c9;
}

.calc-card.corr .calc-conclusion {
    border-top-color: #d9c4f7;
    color: #6b4aa6;
}

.calc-card.corr .calc-steps .lhs {
    color: #5f27c9;
}

.calc-card.corr .final-eq {
    background: #dccaff;
    border-color: #7a3ff2;
    color: #4b1e9e;
}

.calc-card.corr .frac-line {
    color: #4b1e9e;
}

/* Encadrés de contenu : fonds pastel alternés pour éviter les blocs blancs */
.calc-card.t1 {
    background: #eef3ff;
    border-color: #c9d8fb;
    border-left: 5px solid #2549d8;
}

.calc-card.t1 .calc-label {
    color: #1e3ec9;
}

.calc-card.t2 {
    background: #eafaf1;
    border-color: #bfe6d1;
    border-left: 5px solid #1f9d63;
}

.calc-card.t2 .calc-label {
    color: #0d7a45;
}

.calc-card.t3 {
    background: #fff5e8;
    border-color: #f6ddbb;
    border-left: 5px solid #e08a3c;
}

.calc-card.t3 .calc-label {
    color: #b8641a;
}

.calc-card.t4 {
    background: #fdeff6;
    border-color: #f6cbe1;
    border-left: 5px solid #c2318c;
}

.calc-card.t4 .calc-label {
    color: #a3266f;
}

.calc-steps .lhs {
    text-align: right;
    color: var(--blue-ink);
    font-weight: 800;
    white-space: nowrap;
}

.calc-conclusion {
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px dashed var(--line);
    font-size: 14px;
    font-style: italic;
    color: var(--muted);
}

.box.pitfall {
    background: var(--pitfallbg);
    border-color: var(--pitfallborder);
}

.box.pitfall .box-title {
    color: var(--pitfallborder);
}

.box.def {
    background: var(--defbg);
    border-color: var(--defborder);
}

.box.def .box-title {
    color: var(--defborder);
}

.box.method {
    background: var(--methodbg);
    border-color: var(--methodborder);
}

.box.method .box-title {
    color: var(--methodborder);
}

.box.real {
    background: var(--realbg);
    border-color: var(--realborder);
}

.box.real .box-title {
    color: var(--realborder);
}

.input-row {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.input-row input:focus {
    outline: none;
    border-color: var(--blue);
}

.input-row span.unit {
    font-weight: 700;
    color: var(--muted);
}

.opt-btn {
    padding: 12px 18px;
    border-radius: 100px;
    border: 2px solid var(--line);
    background: white;
    font-weight: 700;
    font-size: 14.5px;
    cursor: pointer;
    color: var(--ink);
    transition: all 0.15s ease;
    -webkit-appearance: none;
    appearance: none;
    -webkit-tap-highlight-color: transparent;
}

.opt-btn:hover:not([disabled]),
.opt-btn:active:not([disabled]),
.opt-btn:focus-visible:not([disabled]) {
    border-color: var(--blue);
    color: var(--blue);
}

.opt-btn.correct {
    background: #eafaf1;
    border-color: var(--green);
    color: #0d7a45;
}

.opt-btn.wrong {
    background: #fdecec;
    border-color: var(--red);
    color: #b3241f;
}

.opt-btn[disabled] {
    cursor: default;
}

.opt-btn.primary {
    background: var(--blue);
    color: white;
    border-color: var(--blue);
}

.opt-btn.primary:hover:not([disabled]),
.opt-btn.primary:active:not([disabled]),
.opt-btn.primary:focus-visible:not([disabled]) {
    background: #1e3ec9;
    border-color: #1e3ec9;
    color: white;
}

.feedback {
    border-radius: 12px;
    padding: 14px 16px;
    font-size: 14px;
    font-weight: 600;
    display: none;
    gap: 8px;
    align-items: flex-start;
}

.feedback.show {
    display: flex;
}

.feedback.good {
    background: #eafaf1;
    color: #0d7a45;
}

.feedback.bad {
    background: #fdecec;
    color: #b3241f;
}

.feedback.partial {
    background: #fff5e8;
    color: #b8641a;
}

.footer-nav {
    position: sticky;
    bottom: 0;
    background: white;
    border-top: 1px solid var(--line);
    padding: 16px 22px;
    display: flex;
    gap: 12px;
}

.btn {
    flex: 1;
    padding: 16px;
    border-radius: 100px;
    font-weight: 800;
    font-size: 15.5px;
    border: none;
    cursor: pointer;
    text-align: center;
    -webkit-appearance: none;
    appearance: none;
    -webkit-tap-highlight-color: transparent;
}

.btn-primary {
    background: var(--coral);
    color: white;
}

.btn-primary:hover:not([disabled]),
.btn-primary:active:not([disabled]),
.btn-primary:focus-visible:not([disabled]) {
    background: #e5573c;
    color: white;
}

.btn-primary[disabled] {
    background: #e4e7f2;
    color: var(--muted);
    cursor: not-allowed;
}

.btn-ghost {
    background: transparent;
    color: var(--blue);
    border: 2px solid var(--line);
    flex: none;
    width: auto;
    padding: 16px 20px;
}

.result-ring {
    width: 170px;
    height: 170px;
    margin: 0 auto;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.result-ring svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.result-ring .score-text {
    position: absolute;
    text-align: center;
}

.result-ring .score-text b {
    font-size: 40px;
    display: block;
    color: var(--blue-ink);
}

.result-ring .score-text span {
    font-size: 13px;
    color: var(--muted);
    font-weight: 600;
}

.badge {
    display: flex;
    align-items: center;
    gap: 10px;
    justify-content: center;
    background: linear-gradient(135deg, #fff4ea, #ffe6d8);
    border: 2px solid var(--coral);
    border-radius: 100px;
    padding: 12px 22px;
    font-weight: 800;
    color: #b3441f;
    font-size: 15px;
    margin: 0 auto;
}

.badge.locked {
    background: #f0f1f6;
    border-color: var(--line);
    color: var(--muted);
}

.cta-box {
    background: #f7f8fd;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 24px 22px;
    color: var(--ink);
    text-align: center;
}

.cta-box p {
    margin: 0 0 16px;
    font-size: 14.5px;
    color: var(--muted);
}

.cta-box .cta-photo {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid white;
    box-shadow: 0 4px 14px -6px rgba(15, 34, 102, 0.25);
    display: block;
    margin: 0 auto 12px;
}

.cta-box .wa-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--coral);
    color: white;
    padding: 14px 26px;
    border-radius: 100px;
    font-weight: 800;
    font-size: 15px;
}