body {
    background-color: #ffffff;
    color: #545454;
    position: relative;
    isolation: isolate;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;

    background:
        radial-gradient(
            ellipse at 12% 25%,
            rgba(59, 130, 246, 0.15) 0%,
            transparent 45%
        ),
        radial-gradient(
            ellipse at 88% 70%,
            rgba(36, 133, 200, 0.12) 0%,
            transparent 48%
        ),
        linear-gradient(
            135deg,
            #ffffff 0%,
            #f2f7fc 45%,
            #eaf3fc 70%,
            #ffffff 100%
        );

    opacity: var(--fond-opacity, 1);
}

#topbar {
    background-color: #163853;
    color: #ffffff;
}

#menu {
    background-color: #1c4465;
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(22, 56, 83, 0.18);
}

#menu a {
    color: #ffffff;
    transition: background-color 0.2s ease;
}

#menu a:hover {
    background-color: #3b82f6;
    border-color: #3b82f6;
}

section {
    background: rgba(255, 255, 255, 0.78);
    color: #545454;
    border: 1px solid rgba(22, 56, 83, 0.09);
    border-radius: 14px;
    box-shadow: 0 8px 28px rgba(22, 56, 83, 0.07);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

#photoPres {
    border: 5px solid #163853;
    box-shadow: 0 5px 16px rgba(22, 56, 83, 0.15);
}

h1, h2, h3 {
    color: #163853;
}

h2 {
    text-decoration-color: #3b82f6;
}

.btn {
    background-color: #163853;
    color: #ffffff;
    border: 1px solid #163853;
    transition:
        background-color 0.2s ease,
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.btn:hover {
    background-color: #3b82f6;
    border-color: #3b82f6;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
    transform: translateY(-2px);
}

#cv {
    background-color: #276394;
    color: #ffffff;
}

#cv:hover {
    background-color: #3b82f6;
}

.img-langage span,
.img-certification span {
    color: #ffffff;
    background: rgba(22, 56, 83, 0.3);
    border: 2px solid #3b82f6;
    border-radius: 8px;
}

.proj {
    background-color: rgba(255, 255, 255, 0.92);
    color: #545454;
    border: 1px solid #e1eaf3;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(22, 56, 83, 0.07);
    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease,
        border-color 0.2s ease;
}

.proj:hover {
    transform: translateY(-4px);
    border-color: #b6d5f5;
    box-shadow: 0 10px 24px rgba(22, 56, 83, 0.12);
}

.fleche {
    background: transparent;
    color: #163853;
}

.lien-maps {
    color: #276394;
}

a {
    color: #163853;
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: #3b82f6;
}

.flip-card-front {
    background-color: #ffffff;
    color: #545454;
    border: 2px solid #163853;
    border-radius: 10px;
}

.flip-card-back {
    background-color: #163853;
    color: #ffffff;
    border: 2px solid #163853;
    border-radius: 10px;
}

.learning-list li {
    background-color: rgba(255, 255, 255, 0.9);
    color: #545454;
    border: 1px solid #d7e4f0;
    border-radius: 8px;
}

.apprentissage li {
    background-color: rgba(255, 255, 255, 0.65);
    color: #163853;
    border: 1px solid #9bbfe4;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.9rem;
    transition:
        background-color 0.2s ease,
        border-color 0.2s ease;
}

.apprentissage li:hover {
    background-color: #eaf3fc;
    border-color: #3b82f6;
}

footer {
    background-color: #163853;
    color: #ffffff;
}

/* Mobile */
@media (max-width: 600px) {
    section {
        background: rgba(255, 255, 255, 0.88);
        backdrop-filter: blur(6px);
        -webkit-backdrop-filter: blur(6px);
    }
}

/* Accessibilité : limiter les animations si demandé */
@media (prefers-reduced-motion: reduce) {
    .btn,
    .proj,
    a,
    .apprentissage li {
        transition: none;
    }
}