.collab-page {
    width: min(1120px, calc(100% - 32px));
    margin: 112px auto 72px;
    color: #182a3a;
}

.collab-hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    min-height: 300px;
    padding: clamp(38px, 6vw, 72px) clamp(25px, 7vw, 82px);
    overflow: hidden;
    border-radius: 18px;
    background: linear-gradient(125deg, #102f48 0%, #165a73 54%, #2b8a83 100%);
    box-shadow: 0 20px 50px rgba(16, 47, 72, 0.2);
    color: #fff;
}

.collab-kicker,
.collab-section-kicker {
    display: block;
    color: #f6c86f;
    font-family: Poppins, sans-serif;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    line-height: 1.4;
    text-transform: uppercase;
}

.collab-kicker { margin-bottom: 10px; }

.collab-hero h1 {
    margin: 0;
    font-family: Anton, sans-serif;
    font-size: clamp(2.7rem, 6vw, 5.2rem);
    font-weight: 400;
    line-height: 1.02;
}

.collab-hero h1 strong {
    color: #f6c86f;
    font-weight: 400;
}

.collab-hero p {
    max-width: 610px;
    margin: 22px 0 0;
    color: rgba(255, 255, 255, 0.87);
    font-family: Poppins, sans-serif;
    font-size: 1.05rem;
    line-height: 1.75;
    text-align: left;
}

.collab-hero-mark {
    display: grid;
    flex: 0 0 145px;
    width: 145px;
    height: 145px;
    place-items: center;
    border: 1px solid rgba(255, 255, 255, 0.34);
    border-radius: 50%;
    color: #f6c86f;
    font-size: 4.8rem;
    box-shadow: 0 0 0 18px rgba(255, 255, 255, 0.06), 0 0 0 36px rgba(255, 255, 255, 0.04);
}

.collab-layout {
    display: grid;
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 22px;
    margin-top: 42px;
}

.collab-intro,
.collab-form-card {
    padding: clamp(25px, 4vw, 42px);
    border: 1px solid rgba(24, 42, 58, 0.08);
    border-radius: 12px;
    box-shadow: 0 10px 28px rgba(16, 47, 72, 0.09);
}

.collab-intro { background: #fff1df; }
.collab-form-card { background: rgba(255, 255, 255, 0.9); }

.collab-intro img {
    display: block;
    width: 92px;
    height: auto;
    margin: 0 0 28px;
}

.collab-intro h2,
.collab-form-card h2 {
    margin: 8px 0 16px;
    color: #182a3a;
    font-family: Anton, sans-serif;
    font-size: clamp(1.9rem, 3vw, 2.7rem);
    font-weight: 400;
    line-height: 1.15;
}

.collab-intro p {
    margin: 0;
    color: #405364;
    font-family: Poppins, sans-serif;
    font-size: 0.96rem;
    line-height: 1.8;
    text-align: left;
}

.collab-intro ul {
    display: grid;
    gap: 14px;
    margin: 28px 0 0;
    padding: 0;
    list-style: none;
}

.collab-intro li {
    display: flex;
    align-items: flex-start;
    gap: 11px;
    color: #155b6c;
    font-family: Poppins, sans-serif;
    font-size: 0.92rem;
    font-weight: 700;
    line-height: 1.5;
}

.collab-intro li i {
    flex: 0 0 18px;
    margin-top: 3px;
    color: #d57957;
    text-align: center;
}

.collab-form-card .collab-section-kicker { color: #16706f; }
.collab-form-card form { display: flex; flex-direction: column; }

.collab-form-card label {
    margin-top: 16px;
    color: #182a3a;
    font-family: Poppins, sans-serif;
    font-size: 0.9rem;
    font-weight: 700;
}

.collab-form-card input,
.collab-form-card textarea {
    box-sizing: border-box;
    width: 100%;
    margin-top: 7px;
    padding: 12px 14px;
    border: 1px solid rgba(24, 42, 58, 0.18);
    border-radius: 6px;
    background: #fff;
    color: #182a3a;
    font-family: Poppins, sans-serif;
    font-size: 0.94rem;
    outline: none;
    transition: border-color 180ms ease, box-shadow 180ms ease;
}

.collab-form-card textarea { min-height: 135px; resize: vertical; }

.collab-form-card input:focus,
.collab-form-card textarea:focus {
    border-color: #2b8a83;
    box-shadow: 0 0 0 3px rgba(43, 138, 131, 0.14);
}

.collab-form-card button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    align-self: flex-start;
    margin-top: 25px;
    padding: 13px 23px;
    border: 0;
    border-radius: 6px;
    background: #d57957;
    color: #fff;
    font-family: Poppins, sans-serif;
    font-size: 0.96rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 180ms ease, background 180ms ease;
}

.collab-form-card button:hover { background: #bd6245; transform: translateY(-2px); }

.collab-layout .succes,
.collab-layout .erreur {
    grid-column: 1 / -1;
    margin: 0;
    padding: 14px 16px;
    border-radius: 7px;
    font-family: Poppins, sans-serif;
    line-height: 1.5;
}

@media (max-width: 700px) {
    .collab-page { width: min(100% - 22px, 560px); margin-top: 92px; }
    .collab-hero { min-height: 0; padding: 38px 24px; border-radius: 12px; }
    .collab-hero-mark { display: none; }
    .collab-hero p { font-size: 0.98rem; }
    .collab-layout { grid-template-columns: 1fr; margin-top: 28px; }
    .collab-intro,
    .collab-form-card { padding: 28px 20px; }
    .collab-intro img { width: 78px; margin-bottom: 22px; }
    .collab-form-card button { width: 100%; }
}