body {
    background: linear-gradient(120deg, #232526 0%, #414345 100%);
    font-family: 'Segoe UI', Arial, sans-serif;
    color: #f8f9fa;
    margin: 0;
    padding: 0;
}

.stage-section {
    margin: 40px auto;
    padding: 28px 28px 22px 18px;
    background: linear-gradient(135deg, rgba(17, 28, 48, 0.92) 0%, rgba(24, 42, 66, 0.92) 100%);
    border-radius: 18px;
    box-shadow: 0 8px 32px rgba(0, 123, 255, 0.07), 0 1.5px 6px rgba(0,0,0,0.18);
    border-left: 6px solid #00bfff;
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.9s cubic-bezier(.2,.8,.2,1) both;
    transition: box-shadow 0.3s, border-color 0.3s;
    max-width: 900px;
}

.stage-section:hover {
    box-shadow: 0 16px 48px rgba(0, 123, 255, 0.18), 0 3px 12px rgba(0,0,0,0.22);
    border-left: 6px solid #7f53ac;
}

.stage-section h2 {
    color: #00bfff;
    margin-bottom: 22px;
    font-size: 2.1rem;
    letter-spacing: 1.2px;
    position: relative;
    text-shadow: 0 2px 8px rgba(0,191,255,0.10);
    text-align: center;
}

.stage-section h2::after {
    content: "";
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #00bfff 0%, #7f53ac 100%);
    border-radius: 2px;
    margin: 12px auto 0 auto;
    opacity: 0.7;
}

.stage-section h3 {
    color: #7f53ac;
    margin-bottom: 12px;
    font-size: 1.3rem;
}

.stage-section h4 {
    color: #fff;
    margin-bottom: 10px;
    text-align: left;
    padding-left: 22px;
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.stage-section p {
    color: #e6e6e6;
    line-height: 1.8;
    font-size: 1.1rem;
    text-align: justify;
    margin-bottom: 12px;
}

.stage-section ul {
    margin: 20px 0;
    padding-left: 28px;
    list-style: none;
}

.stage-section ul li {
    margin-bottom: 10px;
    line-height: 1.6;
    font-size: 1rem;
    text-align: left;
    position: relative;
    padding-left: 18px;
}

.stage-section ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: linear-gradient(135deg, #00bfff 60%, #7f53ac 100%);
    box-shadow: 0 0 6px #00bfff88;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px);}
    to { opacity: 1; transform: translateY(0);}
}

/* Diaporama PDF */
.diapo-container {
    text-align: center;
    margin-top: 24px;
}

iframe {
    border-radius: 12px;
    box-shadow: 0px 6px 20px rgba(0, 191, 255, 0.13);
    border: 2px solid #00bfff33;
    background: #181c24;
    transition: box-shadow 0.3s;
}

iframe:hover {
    box-shadow: 0px 12px 32px rgba(127, 83, 172, 0.21);
}

/* Liens */
.diapo-container a,
.website-screenshot-block a {
    color: #00bfff;
    font-weight: bold;
    text-decoration: none;
    transition: color 0.2s, text-shadow 0.2s;
}
.diapo-container a:hover,
.website-screenshot-block a:hover {
    color: #7f53ac;
    text-shadow: 0 0 8px #7f53ac;
    text-decoration: underline;
}

/* Captures d'écran */
.screenshots-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 22px;
    margin-top: 24px;
}
.screenshot-block {
    width: calc(25% - 15px);
    border-radius: 12px;
    box-shadow: 0px 4px 20px rgba(0, 191, 255, 0.09);
    overflow: hidden;
    background: #23243a;
    transition: transform 0.25s, box-shadow 0.25s;
}
.screenshot-block:hover {
    transform: scale(1.045) translateY(-6px);
    box-shadow: 0px 8px 32px rgba(127, 83, 172, 0.16);
}
.screenshot-block img {
    width: 100%;
    height: auto;
    object-fit: cover;
    border-radius: 12px;
}

/* Responsive */
@media (max-width: 900px) {
    .screenshot-block { width: calc(33% - 12px);}
}
@media (max-width: 768px) {
    .stage-section { padding: 18px 8px 14px 6px;}
    .screenshot-block { width: calc(50% - 10px);}
}
@media (max-width: 480px) {
    .screenshot-block { width: 100%;}
}

/* Website screenshot */
.website-screenshot-container {
    display: flex;
    justify-content: center;
    margin-top: 22px;
}
.website-screenshot-block {
    text-align: center;
    max-width: 400px;
    background: #23243a;
    border-radius: 12px;
    box-shadow: 0px 4px 20px rgba(0, 191, 255, 0.09);
    padding: 12px;
}
.website-screenshot-block img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0px 4px 10px rgba(0, 191, 255, 0.11);
    margin-bottom: 8px;
}