/* --- VARIABLES DE LUXE --- */
:root {
    --gold: #C5A059;          /* Or brossé */
    --gold-dark: #8E6F3E;
    --deep-black: #1A1A1A;    /* Noir luxueux */
    --paper-white: #F9F8F6;   /* Blanc cassé texture papier */
    --gray-soft: #E0DDD5;     /* Gris chaud pour séparateurs */
    --text-main: #2C2C2C;     /* Encre foncée */
    --spacing-base: 24px;
}

/* --- BASE & TEXTURE --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--paper-white);
    /* Subtil effet de grain papier */
    background-image: url("https://www.transparenttextures.com/patterns/cream-paper.png");
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-base);
}

/* --- TITRES PRESTIGE --- */
h1, h2, h3, .logo {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* --- HEADER --- */
header {
    padding: 20px 0;
    border-bottom: 1px solid var(--gray-soft);
    background-color: var(--paper-white);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-base);
}

.logo-img {
    height: 50px;
    width: auto;
    filter: grayscale(1) brightness(0.5);
    transition: filter 0.4s ease;
}

.logo-img:hover {
    filter: grayscale(0) brightness(1);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    position: relative;
    padding-bottom: 5px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: 0;
    left: 0;
    background-color: var(--gold);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

/* --- HERO SECTION --- */
#hero {
    background: linear-gradient(rgba(0, 0, 0, 0.65), rgba(0, 0, 0, 0.65)), 
                url('/img/apport-tresorerie-ingenierie-financiere-lux-co.png') no-repeat center center/cover;
    min-height: 85vh;
    display: flex;
    align-items: center;
    color: white;
    text-align: center;
    padding: 140px 0;
    border-bottom: 1px solid var(--gray-soft);
}

#hero h1 {
    font-size: 3.5rem;
    color: #F5E6D3;
    margin-bottom: 30px;
    line-height: 1.1;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
}

#hero p {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto 50px;
    color: #E8D7C3;
    font-weight: 300;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.5);
}

/* --- BOUTONS DE LUXE --- */
.btn-main {
    display: inline-block;
    background: var(--deep-black);
    color: var(--paper-white);
    padding: 22px 50px;
    text-decoration: none;
    text-transform: uppercase;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 3px;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    border: 1px solid var(--deep-black);
    cursor: pointer;
}

.btn-main:hover {
    background: transparent;
    color: var(--deep-black);
    box-shadow: inset 0 0 0 1px var(--deep-black);
    transform: translateY(-2px);
}

/* Boutons spécifiques au hero */
#hero .btn-main {
    background: #C5A059;
    color: #1A1A1A;
    border: 1px solid #C5A059;
    font-weight: 700;
}

#hero .btn-main:hover {
    background: transparent;
    color: #F5E6D3;
    border: 1px solid #F5E6D3;
    box-shadow: inset 0 0 0 1px #F5E6D3;
    transform: translateY(-2px);
}

/* --- SERVICES GRID --- */
#services {
    padding: 80px 0;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background-color: var(--gray-soft);
    margin: 80px 0;
    border: 1px solid var(--gray-soft);
}

.service-card {
    background: var(--paper-white);
    padding: 60px 40px;
    transition: background 0.4s ease;
}

.service-card:hover {
    background: #FFF;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--gold-dark);
}

/* --- FAQ SECTION --- */
#faq {
    padding: 100px 0;
    background: #F0EFEA;
}

.faq-item {
    max-width: 800px;
    margin: 0 auto 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--gray-soft);
}

.faq-item h4 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--deep-black);
}

/* --- MODAL --- */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.7);
}

.modal-content {
    background-color: var(--paper-white);
    background-image: url("https://www.transparenttextures.com/patterns/cream-paper.png");
    margin: 5% auto;
    padding: 60px;
    border: 1px solid var(--deep-black);
    width: 90%;
    max-width: 700px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.2);
    position: relative;
}

.close-button {
    color: var(--text-main);
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 35px;
    font-weight: bold;
    cursor: pointer;
}

.close-button:hover {
    color: var(--gold);
}

.modal-header {
    margin-bottom: 30px;
}

.modal-header h2 {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

/* --- FORM STYLES --- */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 25px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-family: 'Inter', sans-serif;
    letter-spacing: 1px;
    color: var(--gold-dark);
    margin-bottom: 10px;
    font-size: 0.85rem;
    font-weight: 600;
}

.form-group input, 
.form-group textarea, 
.form-group select {
    border: none;
    border-bottom: 1px solid var(--gray-soft);
    background: transparent;
    padding: 15px 0;
    border-radius: 0;
    transition: border-color 0.3s;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-bottom: 1px solid var(--gold);
}

.form-note {
    font-size: 0.75rem;
    color: #888;
    margin: 20px 0;
    font-style: italic;
}

/* --- FOOTER --- */
footer {
    padding: 80px 0;
    background: var(--deep-black);
    color: var(--paper-white);
}

footer p {
    font-size: 0.7rem;
    letter-spacing: 2px;
    opacity: 0.5;
}

/* --- RESPONSIVE --- */
@media (max-width: 900px) {
    .service-grid { 
        grid-template-columns: 1fr; 
    }
    
    #hero h1 { 
        font-size: 2.5rem; 
    }
    
    .nav-links { 
        display: none; 
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
        padding: 40px 25px;
    }
}