```css
/* =========================================
   RESET
========================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #edf4ff;
    --card: rgba(255,255,255,0.78);
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --text: #1e293b;
    --muted: #64748b;
    --border: rgba(255,255,255,0.4);
    --shadow: 0 10px 35px rgba(37,99,235,0.12);
    --radius: 20px;
    --transition: 0.3s ease;
}

body {
    font-family: 'Segoe UI', sans-serif;
    min-height: 100vh;
    background:
        radial-gradient(circle at top left, #dbeafe 0%, transparent 30%),
        radial-gradient(circle at bottom right, #bfdbfe 0%, transparent 35%),
        linear-gradient(135deg, #eef5ff, #f8fbff);
    color: var(--text);
    line-height: 1.6;
}

/* =========================================
   HEADER
========================================= */
header {
    position: relative;
    overflow: hidden;
    text-align: center;
    padding: 90px 20px;
    background-image: url('17973908.jpg');
    background-size: cover;
    background-position: center;
}

header::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(
            135deg,
            rgba(15,23,42,0.72),
            rgba(37,99,235,0.55)
        );
    backdrop-filter: blur(2px);
}

header h1,
header p {
    position: relative;
    z-index: 2;
}

header h1 {
    color: white;
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    letter-spacing: 1px;
    margin-bottom: 12px;
    text-shadow: 0 5px 20px rgba(0,0,0,0.3);
}

header p {
    color: rgba(255,255,255,0.9);
    font-size: 1.1rem;
    letter-spacing: 3px;
    text-transform: uppercase;
}

/* =========================================
   MAIN
========================================= */
main {
    width: min(1100px, 92%);
    margin: -60px auto 60px;
    position: relative;
    z-index: 5;

    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 30px;
}

/* =========================================
   CARDS
========================================= */
section {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 35px;
    backdrop-filter: blur(14px);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

section:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 50px rgba(37,99,235,0.18);
}

section h2 {
    color: var(--primary);
    font-size: 1.2rem;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 12px;
}

section h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 70px;
    height: 4px;
    border-radius: 20px;
    background: linear-gradient(to right, #2563eb, #60a5fa);
}

/* =========================================
   LISTE
========================================= */
ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

ul li {
    background: white;
    padding: 18px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    gap: 15px;
    border: 1px solid rgba(37,99,235,0.08);
    transition: var(--transition);
    font-weight: 500;
}

ul li::before {
    content: '✓';
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #dbeafe;
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

ul li:hover {
    transform: translateX(6px);
    background: #f8fbff;
}

/* =========================================
   FORMULAIRE
========================================= */
form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--muted);
    margin-bottom: -8px;
}

input,
select,
textarea {
    width: 100%;
    padding: 16px;
    border-radius: 14px;
    border: 2px solid transparent;
    background: rgba(255,255,255,0.85);
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
}

input:focus,
select:focus,
textarea:focus {
    border-color: #93c5fd;
    background: white;
    box-shadow: 0 0 0 5px rgba(37,99,235,0.12);
}

textarea {
    min-height: 150px;
    resize: vertical;
}

/* =========================================
   BOUTON
========================================= */
button {
    border: none;
    padding: 16px 28px;
    border-radius: 14px;
    background: linear-gradient(
        135deg,
        var(--primary),
        #3b82f6
    );
    color: white;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 10px 25px rgba(37,99,235,0.25);
}

button:hover {
    transform: translateY(-3px);
    background: linear-gradient(
        135deg,
        var(--primary-dark),
        var(--primary)
    );
    box-shadow: 0 18px 35px rgba(37,99,235,0.35);
}

/* =========================================
   FOOTER
========================================= */
footer {
    text-align: center;
    padding: 30px 20px;
    color: var(--muted);
    font-size: 0.95rem;
}

/* =========================================
   RESPONSIVE
========================================= */
@media (max-width: 900px) {
    main {
        grid-template-columns: 1fr;
        margin-top: -40px;
    }
}

@media (max-width: 600px) {
    header {
        padding: 70px 20px;
    }

    section {
        padding: 25px;
    }

    button {
        width: 100%;
    }
}
```


```css
section {
    animation: fadeUp 0.7s ease;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}
```


```css
button,
input,
select,
textarea {
    transition: all 0.25s ease;
}
```

```css
section:hover {
    transform: translateY(-8px) scale(1.01);
}
```