@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

/* --- Réinitialisation de base --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* --- Variables de couleur et de police --- */
:root {
    --couleur-fond: #0D0B12;
    --couleur-surface: #17141F;
    --couleur-texte: #EDEBF2;
    --couleur-texte-attenue: #9691A8;
    --couleur-accent: #7C5CFC;
    --couleur-bordure: #2A2536;
}

body {
    font-family: 'Poppins', sans-serif;
    color: var(--couleur-texte);
    background-color: var(--couleur-fond);
    line-height: 1.6;
}

section {
    padding: 6rem 8%;
}

h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
}

/* --- En-tête / navigation --- */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--couleur-fond);
    border-bottom: 1px solid var(--couleur-bordure);
    z-index: 100;
    transition: box-shadow 0.2s ease;
}

header.header-scroll {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 8%;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--couleur-texte);
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--couleur-texte);
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-links a:hover {
    color: var(--couleur-accent);
}

/* --- Section Accueil (hero) --- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero h1 {
    font-size: 3rem;
}

.hero h1 span {
    color: var(--couleur-accent);
}

.hero p {
    margin: 1.5rem 0 2rem;
    font-size: 1.2rem;
    color: var(--couleur-texte-attenue);
    max-width: 500px;
}

.btn {
    display: inline-block;
    width: fit-content;
    padding: 0.9rem 2rem;
    background-color: var(--couleur-accent);
    color: var(--couleur-fond);
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: opacity 0.2s ease;
}

.btn:hover {
    opacity: 0.85;
}

/* --- Section À propos --- */
.apropos {
    background-color: var(--couleur-surface);
}

.apropos h2 {
    font-size: 2.2rem;
    margin-bottom: 2.5rem;
}

.apropos-content {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.apropos-img {
    width: 260px;
    height: 260px;
    background-color: var(--couleur-bordure);
    border-radius: 50%;
    flex-shrink: 0;
}

.apropos-content p {
    font-size: 1.1rem;
    color: var(--couleur-texte-attenue);
}

/* --- Section Projets --- */
.projets h2 {
    font-size: 2.2rem;
    margin-bottom: 2.5rem;
}

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

.carte-projet {
    border: 1px solid var(--couleur-bordure);
    border-radius: 10px;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.carte-projet:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 25px rgba(124, 92, 252, 0.18);
}

.projet-img {
    width: 100%;
    height: 200px;
    background-color: var(--couleur-bordure);
}

.carte-projet h3 {
    margin: 1.2rem 1.2rem 0.5rem;
}

.carte-projet p {
    margin: 0 1.2rem 1.2rem;
    color: var(--couleur-texte-attenue);
    font-size: 0.95rem;
}

.btn-secondaire {
    display: inline-block;
    margin: 0 1.2rem 1.5rem;
    padding: 0.6rem 1.4rem;
    border: 2px solid var(--couleur-accent);
    color: var(--couleur-accent);
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.btn-secondaire:hover {
    background-color: var(--couleur-accent);
    color: var(--couleur-fond);
}

/* --- Section Contact --- */
.contact {
    text-align: center;
}

.contact h2 {
    font-size: 2.2rem;
    margin-bottom: 0.8rem;
}

.contact > p {
    color: var(--couleur-texte-attenue);
    margin-bottom: 2.5rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    max-width: 500px;
    margin: 0 auto 3rem;
    text-align: left;
}

.contact-form label {
    font-weight: 600;
    font-size: 0.9rem;
    margin-top: 1rem;
    margin-bottom: 0.4rem;
}

.contact-form input,
.contact-form textarea {
    padding: 0.8rem;
    border: 1px solid var(--couleur-bordure);
    border-radius: 6px;
    font-family: inherit;
    font-size: 1rem;
    background-color: var(--couleur-surface);
    color: var(--couleur-texte);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--couleur-accent);
}

.contact-form button {
    margin-top: 1.5rem;
    padding: 0.9rem;
    background-color: var(--couleur-accent);
    color: var(--couleur-fond);
    border: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.contact-form button:hover {
    opacity: 0.85;
}

.form-message {
    display: none;
    margin: -1.5rem 0 2rem;
    color: var(--couleur-accent);
    font-weight: 500;
}

.form-message.form-message--visible {
    display: block;
}

.reseaux-sociaux {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    font-size: 1.5rem;
}

.reseaux-sociaux a {
    color: var(--couleur-texte);
    transition: color 0.2s ease;
}

.reseaux-sociaux a:hover {
    color: var(--couleur-accent);
}

/* --- Footer --- */
footer {
    text-align: center;
    padding: 2rem 8%;
    color: var(--couleur-texte-attenue);
    font-size: 0.9rem;
    border-top: 1px solid var(--couleur-bordure);
}