* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #1a1a2e;
    line-height: 1.6;
}

/* NAV */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    position: fixed;
    width: 100%;
    top: 0;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: #6c5ce7;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    text-decoration: none;
    color: #1a1a2e;
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover {
    color: #6c5ce7;
}

/* HERO */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem 5%;
    background: linear-gradient(135deg, #f8f9ff 0%, #e8e5ff 100%);
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero h1 span {
    color: #6c5ce7;
}

.hero p {
    font-size: 1.2rem;
    color: #555;
    max-width: 600px;
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    padding: 0.9rem 2.5rem;
    background: #6c5ce7;
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(108,92,231,0.3);
}

/* SECTIONS */
section {
    padding: 5rem 5%;
}

h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1100px;
    margin: 0 auto;
}

.card {
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.06);
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-4px);
}

.card h3 {
    color: #6c5ce7;
    margin-bottom: 0.8rem;
    font-size: 1.3rem;
}

/* REALISATIONS */
.realisations {
    background: #f8f9ff;
}

.placeholder {
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, #e0ddf5, #c8c3f0);
    border-radius: 8px;
    margin-bottom: 1rem;
}

/* CONTACT */
.contact {
    max-width: 600px;
    margin: 0 auto;
}

form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

input, textarea {
    padding: 0.9rem 1.2rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
}

input:focus, textarea:focus {
    outline: none;
    border-color: #6c5ce7;
}

form .btn {
    align-self: flex-start;
}

/* FOOTER */
footer {
    text-align: center;
    padding: 2rem 5%;
    background: #1a1a2e;
    color: #aaa;
    font-size: 0.9rem;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    nav ul {
        gap: 1rem;
    }

    section {
        padding: 3rem 5%;
    }
}