/* ========================================= */
/* ARTISAN DU WEB - À PROPOS */
/* Design élégant, professionnel et intemporel */
/* VERSION ULTRA-OPTIMISÉE RESPONSIVE */
/* ========================================= */

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

/* ========================================= */
/* 1. VARIABLES CSS */
/* ========================================= */

:root {
    --color-primary: #2C3E50;
    --color-secondary: #34495E;
    --color-accent: #D4AF37;
    --color-accent-light: #E8C468;
    --color-highlight: #4ECDC4; /* Vert menthe élégant */
    --color-highlight-light: #7FE5DE;
    --color-background: #FAF9F6;
    --color-card: #FFFFFF;
    --color-text: #2C3E50;
    --color-text-light: #6C7A89;
    --color-border: #E5E5E5;
    
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Lato', 'Helvetica Neue', sans-serif;
    
    /* Espacements fluides avec clamp */
    --spacing-xs: clamp(0.4rem, 1vw, 0.5rem);
    --spacing-sm: clamp(0.75rem, 2vw, 1rem);
    --spacing-md: clamp(1rem, 3vw, 1.5rem);
    --spacing-lg: clamp(1.5rem, 4vw, 2.5rem);
    --spacing-xl: clamp(2rem, 6vw, 4rem);
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    --shadow-sm: 0 2px 8px rgba(44, 62, 80, 0.08);
    --shadow-md: 0 4px 16px rgba(44, 62, 80, 0.12);
    --shadow-lg: 0 8px 32px rgba(44, 62, 80, 0.16);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Touch targets minimum 44px */
    --touch-target: 44px;
}

/* ========================================= */
/* 2. RESET ET BASE */
/* ========================================= */

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

body {
    font-family: var(--font-body);
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-background);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: clamp(15px, 1.5vw, 16px); /* Taille de base fluide */
}

/* Filigrane ultra subtil */
body::after {
    content: '';
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60vw;
    height: 60vh;
    background-image: url('../image/LOGO FCS.jpg');
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    filter: grayscale(100%) opacity(0.02);
    z-index: -1;
    pointer-events: none;
}

/* ========================================= */
/* 3. CONTENEUR PRINCIPAL */
/* ========================================= */

.container {
    max-width: 1100px;
    margin: var(--spacing-xl) auto;
    padding: var(--spacing-xl);
    background: var(--color-card);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    position: relative;
}

.container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

/* ========================================= */
/* 4. TYPOGRAPHIE RESPONSIVE */
/* ========================================= */

h1 {
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 5vw + 0.5rem, 4rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-primary);
    letter-spacing: -0.02em;
    position: relative;
    padding-bottom: var(--spacing-lg);
    line-height: 1.2;
}

h1::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: clamp(60px, 15vw, 100px);
    height: 3px;
    background: var(--color-accent);
}

h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.4rem, 3vw + 0.5rem, 2.5rem);
    font-weight: 700;
    color: var(--color-primary);
    margin: var(--spacing-lg) 0 var(--spacing-lg) 0;
    letter-spacing: -0.01em;
    position: relative;
    padding-left: var(--spacing-md);
    line-height: 1.3;
}

h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: var(--color-accent);
    border-radius: 2px;
}

h3 {
    font-family: var(--font-heading);
    font-size: clamp(1.15rem, 2vw + 0.3rem, 1.4rem);
    font-weight: 600;
    color: var(--color-primary);
    margin: var(--spacing-lg) 0 var(--spacing-md) 0;
    line-height: 1.4;
}

hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
    margin: var(--spacing-xl) 0;
    position: relative;
}

hr::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: clamp(40px, 10vw, 60px);
    height: 2px;
    background: var(--color-accent);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
    line-height: 1.8;
    font-size: clamp(0.95rem, 1.5vw, 1.05rem);
}

/* ========================================= */
/* 5. SECTIONS */
/* ========================================= */

.section {
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    background: var(--color-background);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

/* Désactiver le hover sur mobile */
@media (hover: hover) {
    .section:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-md);
    }
}

/* Layout image + texte */
.content-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.image-col {
    flex: 0 0 42%;
    max-width: 42%;
}

.text-col {
    flex: 1;
}

.section-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

@media (hover: hover) {
    .section-image:hover {
        transform: scale(1.02);
        box-shadow: var(--shadow-lg);
    }
}

/* Alternance image à droite */
.section.row-reverse .content-row {
    flex-direction: row-reverse;
}

/* ========================================= */
/* 6. LISTES */
/* ========================================= */

ul {
    list-style: none;
    padding-left: 0;
    margin: var(--spacing-lg) 0;
}

ul li {
    padding-left: clamp(1.2rem, 4vw, 1.5rem);
    position: relative;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
    font-size: clamp(0.95rem, 1.5vw, 1.05rem);
    line-height: 1.8;
}

ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: clamp(6px, 1.5vw, 8px);
    height: clamp(6px, 1.5vw, 8px);
    background: var(--color-accent);
    border-radius: 50%;
}

/* ========================================= */
/* 7. ENCADRÉ PREMIUM (VERT MENTHE) - OPTIMISÉ MOBILE */
/* ========================================= */

.highlight-box {
    background: linear-gradient(135deg, 
        rgba(78, 205, 196, 0.08) 0%, 
        rgba(127, 229, 222, 0.05) 100%);
    border: 3px solid var(--color-highlight);
    padding: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: 0 8px 24px rgba(78, 205, 196, 0.2);
    position: relative;
    overflow: hidden;
}

/* Animation de pulsation subtile sur la bordure */
@keyframes pulse-border {
    0%, 100% {
        box-shadow: 0 8px 24px rgba(78, 205, 196, 0.2);
    }
    50% {
        box-shadow: 0 8px 32px rgba(78, 205, 196, 0.35);
    }
}

/* Désactiver animation sur mobile pour performances */
@media (min-width: 769px) {
    .highlight-box {
        animation: pulse-border 3s ease-in-out infinite;
    }
}

/* Icône "IMPORTANT" responsive */
.highlight-box::before {
    content: '⚠️ IMPORTANT';
    position: absolute;
    top: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    font-size: clamp(0.7rem, 2vw, 0.85rem);
    font-weight: 700;
    color: var(--color-highlight);
    background: white;
    padding: clamp(0.3rem, 1vw, 0.4rem) clamp(0.8rem, 2vw, 1rem);
    border-radius: 50px;
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--color-highlight);
    letter-spacing: 0.5px;
    white-space: nowrap;
}

/* Décoration subtile en arrière-plan */
.highlight-box::after {
    content: '★';
    position: absolute;
    bottom: var(--spacing-md);
    right: var(--spacing-lg);
    font-size: clamp(2.5em, 8vw, 4em);
    color: var(--color-highlight);
    opacity: 0.08;
}

.highlight-box p {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    font-weight: 500;
    color: var(--color-text);
    margin: clamp(2rem, 5vw, 3rem) 0 0 0;
    line-height: 1.8;
    padding: 0 var(--spacing-sm);
}

.highlight-box strong {
    color: var(--color-highlight);
    font-weight: 700;
    font-size: 1.1em;
}

.highlight-box .badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-highlight) 0%, var(--color-highlight-light) 100%);
    color: white;
    padding: clamp(0.6rem, 2vw, 0.75rem) clamp(1rem, 3vw, 1.5rem);
    border-radius: 50px;
    font-weight: 700;
    font-size: clamp(0.8rem, 2vw, 0.9rem);
    margin-top: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
    min-height: var(--touch-target);
    display: inline-flex;
    align-items: center;
}

@media (hover: hover) {
    .highlight-box .badge:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
    }
}

/* ========================================= */
/* 8. ÉTAPES DE PROCESSUS */
/* ========================================= */

.process-step {
    display: flex;
    align-items: flex-start;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-accent);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

@media (hover: hover) {
    .process-step:hover {
        transform: translateX(8px);
        box-shadow: var(--shadow-md);
    }
}

.step-number {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    color: white;
    border-radius: 50%;
    width: clamp(50px, 10vw, 60px);
    height: clamp(50px, 10vw, 60px);
    min-width: var(--touch-target);
    min-height: var(--touch-target);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: clamp(1.3em, 3vw, 1.7em);
    font-weight: 700;
    font-family: var(--font-heading);
    margin-right: var(--spacing-md);
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.step-content h3 {
    margin-top: 5px;
    color: var(--color-primary);
    font-size: clamp(1.1rem, 2.5vw, 1.3rem);
}

.step-content p {
    margin: var(--spacing-xs) 0 0 0;
    color: var(--color-text-light);
}

/* ========================================= */
/* 9. CALL TO ACTION */
/* ========================================= */

.cta {
    text-align: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    padding: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.cta h3 {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 4vw, 2.2rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: white;
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.cta p {
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.cta a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent);
    color: white;
    padding: clamp(0.75rem, 2vw, 1rem) clamp(1.5rem, 4vw, 2rem);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    font-family: var(--font-body);
    font-size: clamp(0.95rem, 2vw, 1.05rem);
    letter-spacing: 0.5px;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    min-height: var(--touch-target);
}

@media (hover: hover) {
    .cta a:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-lg);
        background: var(--color-accent-light);
    }
}

.cta a:active {
    transform: translateY(-1px);
}

/* ========================================= */
/* 10. BOUTON RETOUR - OPTIMISÉ TOUCH */
/* ========================================= */

.back-button-fixed {
    position: fixed;
    top: clamp(15px, 3vw, 30px);
    left: clamp(15px, 3vw, 30px);
    z-index: 1000;
}

.back-button-fixed .back-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: clamp(45px, 10vw, 55px);
    height: clamp(45px, 10vw, 55px);
    min-width: var(--touch-target);
    min-height: var(--touch-target);
    font-size: clamp(1.5rem, 4vw, 2rem);
    color: var(--color-primary);
    background: white;
    border: 2px solid var(--color-border);
    border-radius: 50%;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

@media (hover: hover) {
    .back-button-fixed .back-link:hover {
        background: var(--color-accent);
        color: white;
        border-color: var(--color-accent);
        transform: translateY(-4px);
        box-shadow: var(--shadow-lg);
    }
}

.back-button-fixed .back-link:active {
    transform: translateY(-2px);
}

/* ========================================= */
/* 11. FOOTER */
/* ========================================= */

.site-footer {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    margin-top: var(--spacing-xl);
    color: var(--color-text-light);
    border-top: 1px solid var(--color-border);
    background: var(--color-background);
}

.site-footer p {
    margin: 0;
    font-size: clamp(0.85rem, 1.5vw, 0.95rem);
}

/* ========================================= */
/* 12. RESPONSIVE - BREAKPOINTS OPTIMISÉS */
/* ========================================= */

/* Tablettes et petits laptops */
@media (max-width: 1024px) {
    .container {
        margin: var(--spacing-lg) clamp(20px, 4vw, 40px);
        padding: var(--spacing-lg);
    }
    
    .content-row {
        gap: var(--spacing-lg);
    }
}

/* Tablettes en portrait et mobiles large */
@media (max-width: 768px) {
    .container {
        margin: var(--spacing-lg) clamp(15px, 3vw, 20px);
        padding: var(--spacing-lg) var(--spacing-md);
        border-radius: var(--radius-md);
    }
    
    /* Layout empilé sur mobile */
    .content-row,
    .section.row-reverse .content-row {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .image-col,
    .text-col {
        flex: 0 0 100%;
        max-width: 100%;
    }
    
    .section {
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-md);
    }
    
    .highlight-box {
        padding: clamp(1.5rem, 5vw, 2rem) var(--spacing-md);
        margin: var(--spacing-lg) 0;
    }
    
    .highlight-box::before {
        top: var(--spacing-sm);
        left: 50%;
    }
    
    .cta {
        padding: var(--spacing-lg) var(--spacing-md);
        margin-top: var(--spacing-lg);
    }
    
    /* Process steps empilés sur mobile */
    .process-step {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: var(--spacing-md);
    }
    
    .step-number {
        margin-right: 0;
        margin-bottom: var(--spacing-sm);
    }
}

/* Petits mobiles */
@media (max-width: 480px) {
    .container {
        margin: var(--spacing-md) 10px;
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .section {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .highlight-box {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    .highlight-box::before {
        font-size: 0.7rem;
        padding: 0.25rem 0.6rem;
    }
    
    .cta {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    /* Texte plus compact sur très petits écrans */
    body {
        font-size: 14px;
    }
}

/* Très petits écrans (< 360px) */
@media (max-width: 360px) {
    .container {
        margin: var(--spacing-sm) 5px;
        padding: var(--spacing-sm);
    }
    
    .highlight-box::before {
        content: '⚠️';
        font-size: 1rem;
    }
}

/* ========================================= */
/* 13. ANIMATIONS */
/* ========================================= */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Animations désactivées sur mobile pour performances */
@media (min-width: 769px) {
    .container,
    .section,
    .highlight-box,
    .process-step,
    .cta {
        animation: fadeInUp 0.6s ease-out backwards;
    }
    
    .section:nth-child(1) { animation-delay: 0.1s; }
    .section:nth-child(2) { animation-delay: 0.15s; }
    .section:nth-child(3) { animation-delay: 0.2s; }
    .section:nth-child(4) { animation-delay: 0.25s; }
    
    .process-step:nth-child(1) { animation-delay: 0.1s; }
    .process-step:nth-child(2) { animation-delay: 0.15s; }
    .process-step:nth-child(3) { animation-delay: 0.2s; }
}

/* ========================================= */
/* 14. ACCESSIBILITÉ */
/* ========================================= */

/* Respect des préférences utilisateur */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible pour navigation clavier */
a:focus-visible,
button:focus-visible,
.cta a:focus-visible,
.back-button-fixed .back-link:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 4px;
}

/* Sélection de texte */
::selection {
    background: var(--color-accent-light);
    color: white;
}

/* Scrollbar personnalisée (desktop uniquement) */
@media (min-width: 769px) {
    ::-webkit-scrollbar {
        width: 10px;
    }
    
    ::-webkit-scrollbar-track {
        background: var(--color-background);
    }
    
    ::-webkit-scrollbar-thumb {
        background: var(--color-accent);
        border-radius: 5px;
    }
    
    ::-webkit-scrollbar-thumb:hover {
        background: var(--color-accent-light);
    }
}

/* Support du mode sombre système (optionnel) */
@media (prefers-color-scheme: dark) {
    /* Peut être activé si besoin d'un thème sombre */
}