/* --- 1. VARIABLES & RESET --- */
:root {
    --font-heading: "Kumar One Outline", system-ui, cursive;
    --font-body: "Commissioner", sans-serif;
    
    --color-bg: #fdfdfd;
    --color-text: #2d3436;
    --color-accent: #6c5ce7; /* Violet moderne */
    --color-accent-hover: #5649c0;
    --color-card-bg: #ffffff;
    --color-footer-bg: #2d3436;
    --color-footer-text: #dfe6e9;
    
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --radius: 12px;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-weight: 400;
}

/* --- 2. LAYOUT UTILS --- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

img {
    max-width: 100%;
    display: block;
}

/* --- 3. HEADER & BANNIÈRE --- */
header {
    text-align: center;
    padding: 2rem 0 4rem 0; /* Moins de padding haut car la photo prend de la place */
    background: radial-gradient(circle at center, #f0f3f9 0%, #fdfdfd 100%);
    margin-bottom: 2rem;
}

/* Style de la bannière photo */
.hero-banner {
    width: 100%;
    height: 350px; /* Hauteur fixe pour l'élégance */
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 2.5rem;
    box-shadow: var(--shadow);
}

.hero-banner img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* Recadre intelligemment l'image */
    object-position: center 30%; /* Centre l'image légèrement vers le haut */
}

header h1 {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3.5rem);
    color: var(--color-accent);
    margin-bottom: 1rem;
}

header p {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 2rem auto;
    color: #636e72;
}

/* --- 4. BOUTONS GÉNÉRAUX --- */
button {
    font-family: var(--font-body);
    font-weight: 600;
    background-color: var(--color-accent);
    color: white;
    border: 2px solid var(--color-accent);
    padding: 10px 24px;
    border-radius: 50px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 0 5px;
}

button:hover {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    transform: translateY(-2px);
}

button.btn-secondary {
    background-color: transparent;
    color: var(--color-accent);
}

button.btn-secondary:hover {
    background-color: var(--color-accent);
    color: white;
}

/* --- 5. MAIN CONTENT --- */
section {
    margin-bottom: 4rem;
}

h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--color-text);
    text-align: center;
    margin-bottom: 2rem;
    position: relative;
}

h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--color-accent);
    margin: 10px auto 0;
}

/* --- 6. GRILLE PROJETS (MODIFIÉE POUR 2x2) --- */
.grid-projects {
    display: grid;
    /* Version Mobile : 1 seule colonne pour que ce soit lisible */
    grid-template-columns: 1fr;
    gap: 30px;
}

/* À partir de 700px (Tablettes et Ordinateurs) : On force 2 colonnes */
@media (min-width: 700px) {
    .grid-projects {
        /* repeat(2, 1fr) = Crée exactement 2 colonnes de largeur égale */
        grid-template-columns: repeat(2, 1fr); 
    }
}

.project-card {
    background-color: var(--color-card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    /* On s'assure que toutes les cartes aient la même hauteur */
    height: 100%; 
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.img-container {
    height: 180px;
    background-color: #eee;
    overflow: hidden;
}

.img-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-card:hover .img-container img {
    transform: scale(1.05);
}

/* Content Flexbox pour aligner le bouton en bas */
.card-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between; /* Pousse le bouton vers le bas */
}

.project-title {
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
    color: var(--color-text);
}

.authors {
    font-size: 0.9rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.desc {
    font-size: 0.95rem;
    color: #636e72;
    margin-bottom: 1.5rem; /* Espace avant le bouton */
}

/* --- Nouveau Bouton "Visiter le site" --- */
.btn-visit {
    display: block;
    text-align: center;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    padding: 10px 0;
    border-radius: 8px;
    color: var(--color-accent);
    background-color: rgba(108, 92, 231, 0.1); /* Fond léger */
    border: 1px solid transparent;
    transition: all 0.2s;
}

.btn-visit:hover {
    background-color: var(--color-accent);
    color: white;
}

/* --- 7. IFRAME --- */
.iframe-container {
    position: relative;
    overflow: hidden;
    padding-top: 100%;
    background: #f0f0f0;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

@media (min-width: 768px) {
    .iframe-container {
        padding-top: 56.25%;
    }
}

.iframe-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* --- 8. FOOTER --- */
footer {
    background-color: var(--color-footer-bg);
    color: var(--color-footer-text);
    padding: 3rem 0;
    text-align: center;
    font-size: 0.9rem;
}

footer strong {
    color: white;
    font-size: 1.1rem;
}

footer .legal {
    margin-top: 1.5rem;
    font-size: 0.8rem;
    color: #b2bec3;
}

footer a {
    color: var(--color-accent);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
    color: white;
}