/* fonc_quad_exos.css — styles for the quadratic exercise widget
 * All rules are scoped to .fonc_quad_exos to avoid collisions with the host site.
 */

.fonc_quad_exos {
    font-family: "Segoe UI", Arial, sans-serif;
    background: #ffffff;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.09);
    max-width: 860px;
    margin: 28px auto;
    line-height: 1.5;
}

/* ── headings ────────────────────────────────────────────────── */

.fonc_quad_exos h2 {
    text-align: center;
    margin: 0 0 18px;
    font-size: 1.25rem;
}

.fonc_quad_exos h4 {
    margin: 0 0 10px;
    font-size: 0.95rem;
    color: #444;
}

/* ── given-form label ────────────────────────────────────────── */

.fonc_quad_exos #fqe-given {
    text-align: center;
    margin: 0 0 10px;
    font-size: 0.95rem;
    color: #555;
}

/* ── boxes ───────────────────────────────────────────────────── */

.fonc_quad_exos .fqe-box {
    background: #f4f7ff;
    padding: 14px 16px;
    border-radius: 8px;
    margin-bottom: 14px;
    transition: background 0.2s;
}

.fonc_quad_exos .fqe-box:hover {
    background: #eaf0ff;
}

/* ── formula display area ────────────────────────────────────── */

.fonc_quad_exos .fqe-formula {
    font-size: 1.15rem;
    text-align: center;
    margin-top: 10px;
    line-height: 2.8;
    word-spacing: 0.1em;
}

.fonc_quad_exos .fqe-no-fac {
    color: #777;
}

/* ── number inputs ───────────────────────────────────────────── */

.fonc_quad_exos input {
    width: 60px;
    padding: 4px 6px;
    text-align: center;
    border-radius: 5px;
    border: 1px solid #bbc;
    font-size: inherit;
    font-family: inherit;
    background: #f8f9fc;
    vertical-align: middle;
    margin: 0 4px;
    transition: border-color 0.15s, background 0.15s;
}

.fonc_quad_exos input:focus {
    outline: none;
    border-color: #3498db;
    background: #fff;
}

.fonc_quad_exos input.fqe-good {
    border: 2px solid #2ecc71;
    background: #ecfff5;
}

.fonc_quad_exos input.fqe-bad {
    border: 2px solid #e74c3c;
    background: #fff0f0;
}

.fonc_quad_exos input:disabled {
    background: #e8eaf0;
    color: #444;
    border-color: #ccc;
    cursor: default;
}

/* ── operator toggle buttons ─────────────────────────────────── */

.fonc_quad_exos .fqe-op {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.6em;
    height: 1.6em;
    padding: 0;
    border-radius: 6px;
    border: 1px solid #99aacc;
    background: #dce4f5;
    color: #223;
    font-size: inherit;
    font-family: inherit;
    font-weight: 700;
    line-height: 1;
    vertical-align: middle;
    margin: 0 4px;
    cursor: pointer;
    transition: background 0.15s;
}

.fonc_quad_exos .fqe-op:hover:not(:disabled) {
    background: #c4d0ee;
}

.fonc_quad_exos .fqe-op:disabled {
    background: #e8eaf0;
    border-color: #ccc;
    color: #666;
    cursor: default;
}

/* ── select ──────────────────────────────────────────────────── */

.fonc_quad_exos select {
    display: block;
    margin: 0 auto 6px;
    padding: 4px 6px;
    border-radius: 5px;
    border: 1px solid #bbc;
    font-size: 0.95rem;
    background: #fff;
    cursor: pointer;
}

/* ── action buttons (Valider / Nouvel exercice) ──────────────── */

.fonc_quad_exos .fqe-btn-row {
    text-align: center;
    margin: 6px 0;
}

.fonc_quad_exos .fqe-btn-row button {
    padding: 9px 18px;
    margin: 6px 6px;
    border-radius: 6px;
    border: none;
    background: #3498db;
    color: #fff;
    font-size: 0.95rem;
    cursor: pointer;
    transition: background 0.2s;
}

.fonc_quad_exos .fqe-btn-row button:hover {
    background: #2980b9;
}

/* ── feedback ────────────────────────────────────────────────── */

.fonc_quad_exos #fqe-feedback {
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    margin: 6px 0;
    min-height: 1.6em;
}

/* ── chart ───────────────────────────────────────────────────── */

.fonc_quad_exos .fqe-chart-wrapper {
    max-width: 700px;
    margin: 16px auto 0;
}

/* ── two-column layout on wider screens ──────────────────────── */

@media (min-width: 700px) {
    .fonc_quad_exos {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
        align-items: start;
    }

    .fonc_quad_exos h2,
    .fonc_quad_exos #fqe-given,
    .fonc_quad_exos .fqe-box,
    .fonc_quad_exos .fqe-btn-row,
    .fonc_quad_exos #fqe-feedback,
    .fonc_quad_exos .fqe-chart-wrapper {
        grid-column: span 2;
    }
}