/* ============================================
   COLLABORAZIONI — STILE PREMIUM UNIFICATO
============================================ */

.page-news {
    background: #f5f7f9;
}

/* ============================
   HERO
============================ */

.page-hero {
    padding: 35px 0 25px 0;
    background: #e6eef1;
    color: #23333a;
    text-align: center;
    border-bottom: 3px solid #4d798b20;
    border-top: 2px solid #d3dde2;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: #355866;
}

.page-subtitle {
    font-size: 1rem;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
}

/* CONTAINER */
.page-container {
    width: 90%;
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 20px;
}

/* SEZIONE */
.collbr-section {
    width: 100%;
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 0 30px 0;
}

/* TITOLO — STILE "CHI SIAMO" UNIFICATO */
.collbr-main-title {
    text-align: center;
    font-size: 2.8rem;
    font-weight: 800;
    background: #e6eef1;
    color: #23333a;
    margin-bottom: 15px;
    padding: 35px 0 25px 0;
    border-radius: 14px;
    border-bottom: 3px solid #4d798b20;
    border-top: 2px solid #d3dde2;
}

.collbr-main-subtitle {
    text-align: center;
    font-size: 1.25rem;
    color: #4d798b;
    margin-top: 10px;
    margin-bottom: 45px;
}

/* ANIMAZIONE DI ENTRATA */
@keyframes fadeSlideUp {
    0% {
        opacity: 0;
        transform: translateY(25px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================
   GRIGLIA SPONSOR
============================ */

.collbr-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 35px;
    padding: 0;
    /* desktop */
}

/* CARD */
.collbr-col {
    background: #ffffff;
    padding: 22px;
    border-radius: 16px;
    text-align: center;
    border-top: 6px solid var(--collbr-color, #4d798b);

    box-shadow:
        0 4px 8px rgba(0, 0, 0, 0.12),
        0 14px 28px rgba(0, 0, 0, 0.10),
        0 28px 56px rgba(0, 0, 0, 0.08);

    transition: transform 0.35s ease, box-shadow 0.35s ease;

    animation: fadeSlideUp 0.7s ease forwards;
    opacity: 0;
}

.collbr-col:hover {
    transform: translateY(-14px);
    box-shadow:
        0 8px 16px rgba(0, 0, 0, 0.18),
        0 26px 52px rgba(0, 0, 0, 0.16),
        0 40px 80px rgba(0, 0, 0, 0.14);
}

.collbr-col:hover .collbr-img-box {
    transform: scale(1.05);
    box-shadow:
        inset 0 0 18px rgba(0, 0, 0, 0.12),
        0 12px 24px rgba(0, 0, 0, 0.18);
}

/* IMMAGINE */
.collbr-img-box {
    width: 100%;
    height: 180px;
    border-radius: 12px;
    overflow: hidden;
    background: #f7fafb;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
    margin-bottom: 15px;

    box-shadow:
        inset 0 0 14px rgba(0, 0, 0, 0.10),
        0 6px 12px rgba(0, 0, 0, 0.12);

    transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.collbr-img-box img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* TESTO */
.collbr-card-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: #355866;
    margin-bottom: 10px;
}

.collbr-card-text {
    font-size: 0.95rem;
    color: #355866;
    line-height: 1.55;
    margin-top: 10px;
}

/* ICONE */
.collbr-icons {
    margin-top: 12px;
    font-size: 1rem;
    color: #355866;
    line-height: 1.6;
}

.collbr-icons i {
    margin-right: 6px;
    color: #4d798b;
    font-size: 1.1rem;
}

/* BOTTONE */
.collbr-btn {
    display: inline-block;
    margin-top: 18px;
    padding: 10px 22px;
    background: #355866;
    color: #ffffff;
    border-radius: 10px;
    font-weight: 600;
    transition: background 0.25s ease, transform 0.25s ease;
}

.collbr-btn:hover {
    background: #4d798b;
    transform: translateY(-3px);
}

/* ============================
   SPONSOR PRINCIPALE — SETI
============================ */

.main-sponsor-card {
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(12px);
    border-radius: 22px;
    padding: 50px 40px;
    margin: 40px auto 70px auto;
    max-width: 1000px;
    text-align: center;

    box-shadow:
        0 0 22px rgba(77, 121, 139, 0.35),
        0 12px 32px rgba(0, 0, 0, 0.15);

    border: 2px solid rgba(77, 121, 139, 0.35);

    animation: setiFadeIn 0.9s ease forwards;
    opacity: 0;
}

.main-sponsor-badge {
    display: inline-block;
    background: linear-gradient(135deg, #355866, #4d798b);
    color: #ffffff;
    padding: 10px 26px;
    border-radius: 999px;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 30px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.main-sponsor-logo-box {
    margin-bottom: 30px;
    background: linear-gradient(135deg, #e6eef1, #ffffff);
    padding: 25px;
    border-radius: 18px;
}

.main-sponsor-logo {
    width: 100%;
    max-width: 650px;
    display: block;
    margin: 0 auto;
}

.main-sponsor-title {
    font-size: 2.3rem;
    font-weight: 700;
    color: #355866;
    margin-bottom: 15px;
}

.main-sponsor-text {
    font-size: 1.2rem;
    color: #355866;
    line-height: 1.7;
    max-width: 750px;
    margin: 0 auto 35px auto;
}

.main-sponsor-btn {
    display: inline-block;
    background: #4d798b;
    color: #ffffff;
    padding: 14px 32px;
    border-radius: 999px;
    font-size: 1.05rem;
    font-weight: 600;
    transition: 0.25s ease;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}

.main-sponsor-btn:hover {
    background: #355866;
    transform: translateY(-3px);
}

.main-sponsor-divider {
    width: 100%;
    max-width: 900px;
    height: 3px;
    background: linear-gradient(90deg, transparent, #4d798b, transparent);
    margin: 60px auto;
    border-radius: 999px;
}

/* ANIMAZIONE FADE-IN PER BLOCCO SETI */
@keyframes setiFadeIn {
    0% {
        opacity: 0;
        transform: translateY(25px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================
   RESPONSIVE MOBILE DEFINITIVO
============================ */

@media (max-width: 600px) {

    /* padding laterale per tutta la sezione sponsor */
    .collbr-section {
        padding-left: 15px;
        padding-right: 15px;
    }

    /* padding laterale per la griglia */
    .collbr-row {
        padding-left: 10px;
        padding-right: 10px;
    }

    /* SETI mantiene il suo margine */
    .main-sponsor-card {
        margin-left: 15px;
        margin-right: 15px;
    }

    /* logo SETI più piccolo in mobile */
    .main-sponsor-logo {
        max-width: 480px;
    }
}

@media (max-width: 600px) {
    .collbr-row {
        grid-template-columns: 1fr !important;
    }
}


.main-sponsor-card {
    overflow: visible !important;
}

/* ============================================================
   MAIN SPONSOR — SOLO BORDO ANIMATO PREMIUM
============================================================ */

.main-sponsor-card {
    position: relative;
    overflow: hidden;
    border-radius: 20px;
    /* coerente con le altre card */
}

/* Bordo blu animato */
.main-sponsor-card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 20px;
    padding: 2px;
    background: linear-gradient(135deg, #4d798b, #355866, #4d798b);
    opacity: 0;
    transition: opacity 0.35s ease;

    -webkit-mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;

    pointer-events: none;
}

.main-sponsor-card:hover::before {
    opacity: 1;
}


.collbr-col:hover::before {
    opacity: 1;
}