/* Liens étudiants sobres, mais lisibles et accessibles au clavier. */
.exercise-access {
    margin: 12px 0;
    font-size: 0.85rem;
}
.exercise-access a {
    color: var(--muted, #727b75);
    text-decoration: underline;
    text-underline-offset: 3px;
}
.exercise-access a:hover,
.exercise-access a:focus-visible {
    color: var(--primary, #6bc928);
}
.student-exercise {
    padding: 140px 20px 70px;
    min-height: 80vh;
}
.student-exercise-card {
    max-width: 740px;
    margin: auto;
    padding: clamp(22px, 4vw, 42px);
    background: var(--card-bg, #142019);
    color: var(--text, #fff);
    border: 1px solid var(--border, #34473a);
    border-radius: 22px;
}
.student-exercise-card h1 {
    font-size: clamp(1.6rem, 4vw, 2.5rem);
    line-height: 1.2;
}
.student-exercise-card p {
    line-height: 1.65;
    overflow-wrap: anywhere;
}
.student-exercise-kicker {
    color: var(--primary, #6bc928);
}
.student-exercise-form {
    display: grid;
    gap: 12px;
    margin: 24px 0;
}
.student-exercise-form input {
    min-width: 0;
    width: 100%;
    box-sizing: border-box;
    border: 1px solid var(--border, #34473a);
    border-radius: 9px;
    padding: 12px;
    font: inherit;
    background: var(--bg, #111);
    color: var(--text, #fff);
}
.student-exercise-form button {
    padding: 13px 20px;
    border: 0;
    border-radius: 10px;
    background: var(--primary, #6bc928);
    color: #102008;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}
.exercise-note {
    font-size: 0.85rem;
    color: var(--muted, #aab9ac);
}
.exercise-error {
    padding: 14px;
    border: 1px solid #cf7951;
    border-radius: 10px;
}
.exercise-download-status {
    margin: 2px 0 0;
    padding: 11px 13px;
    border-radius: 9px;
    background: color-mix(in srgb, var(--primary, #6bc928) 14%, transparent);
    color: var(--text, #fff);
    font-weight: 700;
}
.exercise-download-status.is-error {
    border: 1px solid #cf7951;
    background: color-mix(in srgb, #cf7951 14%, transparent);
}
.student-exercise-form button:disabled { cursor: wait; opacity: .72; }
.student-exercise-form :focus-visible {
    outline: 3px solid var(--primary, #6bc928);
    outline-offset: 3px;
}

/* Le raccourci flottant ne doit pas recouvrir le formulaire privé sur mobile. */
body:has(.student-exercise) .floating-social {
    display: none;
}