/* ===================================
   SYNERGIE SOFTWARE - LANDING PAGE
   Version 1.0 - Vanilla CSS
   Mobile-First Responsive Design
   =================================== */

/* ===================================
   CSS VARIABLES
   =================================== */
:root {
    /* Colors - Blue & Orange Theme */
    --color-primary: #2563eb;
    --color-primary-light: #3b82f6;
    --color-primary-dark: #1e40af;
    --color-accent: #f97316;
    --color-accent-light: #fb923c;
    --color-accent-dark: #ea580c;
    
    /* Neutral Colors */
    --color-bg-primary: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-tertiary: #334155;
    --color-text-primary: #f8fafc;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #94a3b8;
    --color-border: #334155;
    
    /* Semantic Colors */
    --color-success: #22c55e;
    --color-warning: #eab308;
    --color-error: #ef4444;
    --color-info: #3b82f6;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Typography */
    --font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 1rem;
    --line-height-base: 1.6;
    
    /* Layout */
    --container-max-width: 1280px;
    --container-padding: 1.5rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
    
    /* Z-index */
    --z-header: 1000;
    --z-overlay: 999;
    --z-modal: 1001;
}

/* ===================================
   FIX SCROLL HORIZONTAL
   =================================== */
html {
    overflow-x: hidden;
    width: 100%;
    scroll-behavior: smooth;
}

body {
    overflow-x: hidden;
    width: 100%;
    position: relative;
}

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

*::before,
*::after {
    box-sizing: border-box;
}

img,
svg,
video,
canvas,
iframe {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ===================================
   BASE STYLES
   =================================== */
body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin: 0;
}

p {
    margin: 0;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

/* ===================================
   LAYOUT
   =================================== */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin-inline: auto;
    padding-inline: var(--container-padding);
    overflow-x: hidden;
}

.section {
    padding-block: var(--spacing-3xl);
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
}

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section__label {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: rgba(37, 99, 235, 0.1);
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: var(--radius-full);
    color: var(--color-primary-light);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.section__title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.section__description {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
    max-width: 800px;
    margin-inline: auto;
}

/* ===================================
   HEADER & NAVIGATION
   =================================== */
.header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background-color: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    width: 100%;
    max-width: 100%;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-block: var(--spacing-md);
    width: 100%;
    max-width: 100%;
}

.nav__brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: 1.25rem;
}

.nav__logo {
    color: var(--color-primary);
}

.nav__title {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav__toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 2.5rem;
    height: 2.5rem;
    padding: 0.5rem;
    color: var(--color-text-primary);
    background-color: transparent;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-base);
    z-index: calc(var(--z-header) + 1);
}

.nav__toggle:hover {
    background-color: var(--color-bg-secondary);
}

.nav__toggle:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(280px, 85vw);
    height: 100vh;
    background-color: var(--color-bg-secondary);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-2xl) var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    transition: right var(--transition-base);
    z-index: 1000;
    overflow-y: auto;
    overflow-x: hidden;
}

.nav__menu.show {
    right: 0;
}

.nav__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
}

.nav__link {
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: color var(--transition-base), background-color var(--transition-base);
    display: block;
}

.nav__link:hover {
    color: var(--color-primary-light);
    background-color: rgba(37, 99, 235, 0.1);
}

.nav__link:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.nav__cta {
    margin-top: var(--spacing-md);
}

/* Overlay pour fermer le menu */
.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--z-overlay);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.nav-overlay.show {
    display: block;
    opacity: 1;
}

/* ===================================
   HERO
   =================================== */
.hero {
    padding-block: var(--spacing-3xl);
    text-align: center;
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    position: relative;
    width: 100%;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(249, 115, 22, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero__content {
    position: relative;
    z-index: 1;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.625rem 1.25rem;
    background-color: rgba(37, 99, 235, 0.1);
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: var(--radius-full);
    color: var(--color-primary-light);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    max-width: calc(100% - 2rem);
    margin-inline: auto;
}

.hero__badge svg {
    color: var(--color-accent);
}

.hero__title {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-text-primary), var(--color-primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    padding-inline: 1rem;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.hero__subtitle {
    color: var(--color-text-secondary);
    font-size: clamp(1rem, 3vw, 1.25rem);
    max-width: min(800px, 90%);
    margin-inline: auto;
    margin-bottom: var(--spacing-xl);
    padding-inline: 1rem;
}

.hero__cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    padding-inline: 1rem;
}

/* ===================================
   BUTTONS
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.btn--primary {
    background-color: var(--color-primary);
    color: white;
}

.btn--primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn--secondary {
    background-color: transparent;
    color: var(--color-text-primary);
    border: 2px solid var(--color-border);
}

.btn--secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary-light);
}

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

.btn--accent:hover {
    background-color: var(--color-accent-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn--block {
    width: 100%;
}

/* ===================================
   PROBLEMS (CONSTAT)
   =================================== */
.problems {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    width: 100%;
    padding-inline: 0.5rem;
}

.problem-card {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.problem-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.problem-card__icon {
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.problem-card__title {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
    word-break: break-word;
}

.problem-card__text {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    overflow-wrap: break-word;
}

/* ===================================
   SOLUTION
   =================================== */
.solution {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    width: 100%;
    overflow: hidden;
}

.solution__intro {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.solution__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.solution__list li {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.solution__list svg {
    flex-shrink: 0;
    color: var(--color-success);
    margin-top: 2px;
}

.solution__list span {
    color: var(--color-text-secondary);
}

.solution__visual {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(249, 115, 22, 0.05));
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
}

.solution__visual svg {
    max-width: 100%;
    height: auto;
}

/* ===================================
   ARCHITECTURE / FONCTIONNEMENT
   =================================== */
.architecture__diagram {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

.architecture__layer {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background-color: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
}

.architecture__layer:last-child {
    margin-bottom: 0;
}

.architecture__layer-title {
    font-size: 1.125rem;
    color: var(--color-primary-light);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.architecture__components {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.architecture__component {
    padding: 0.5rem 1rem;
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ===================================
   MODULES
   =================================== */
.modules {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    width: 100%;
    padding-inline: 0.5rem;
}

.module-card {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.module-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.module-card__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.module-card__icon {
    color: var(--color-primary-light);
}

.module-card__badge {
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.module-card__badge--done {
    background-color: rgba(34, 197, 94, 0.1);
    color: var(--color-success);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.module-card__badge--progress {
    background-color: rgba(234, 179, 8, 0.1);
    color: var(--color-warning);
    border: 1px solid rgba(234, 179, 8, 0.3);
}

.module-card__badge--planned {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--color-info);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.module-card__title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
    word-break: break-word;
}

.module-card__desc {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-md);
    overflow-wrap: break-word;
}

.module-card__features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.module-card__features li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.module-card__features svg {
    flex-shrink: 0;
    color: var(--color-primary-light);
    margin-top: 2px;
}

/* ===================================
   DEPLOYMENT
   =================================== */
.deployment {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(250px, 100%), 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    width: 100%;
    padding-inline: 0.5rem;
}

.deployment__item {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.deployment__item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.deployment__icon {
    color: var(--color-primary-light);
    margin-bottom: var(--spacing-md);
}

.deployment__title {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.deployment__text {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    overflow-wrap: break-word;
}

/* ===================================
   OFFERS (PRICING)
   =================================== */
.offers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    width: 100%;
    padding-inline: 0.5rem;
}

.offer-card {
    background-color: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.offer-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.offer-card--featured {
    border-color: var(--color-primary);
    position: relative;
}

.offer-card--featured::before {
    content: 'Recommandé';
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.375rem 0.875rem;
    background-color: var(--color-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    border-radius: var(--radius-full);
}

.offer-card__name {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
    word-break: break-word;
}

.offer-card__description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    font-size: 0.9375rem;
}

.offer-card__price {
    margin-bottom: var(--spacing-xl);
}

.offer-card__amount {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-primary-light);
}

.offer-card__period {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.offer-card__features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-grow: 1;
}

.offer-card__features li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.offer-card__features svg {
    flex-shrink: 0;
    color: var(--color-success);
    margin-top: 2px;
}

.offer-card__cta {
    margin-top: auto;
}

/* ===================================
   FAQ (ACCORDION)
   =================================== */
.faq {
    max-width: 800px;
    margin-inline: auto;
    margin-top: var(--spacing-xl);
}

.faq-item {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    transition: box-shadow var(--transition-base);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    text-align: left;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text-primary);
    background: transparent;
    cursor: pointer;
    transition: color var(--transition-base);
}

.faq-question:hover {
    color: var(--color-primary-light);
}

.faq-question:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: -2px;
}

.faq-icon {
    flex-shrink: 0;
    color: var(--color-primary-light);
    transition: transform var(--transition-base);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base), padding var(--transition-base);
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.faq-answer p {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ===================================
   CONTACT FORM
   =================================== */
.contact {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.contact__info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact__info-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.contact__info-icon {
    color: var(--color-primary-light);
    flex-shrink: 0;
}

.contact__info-content h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.contact__info-content p,
.contact__info-content a {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.contact__info-content a:hover {
    color: var(--color-primary-light);
}

.contact__form {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    width: 100%;
    max-width: 100%;
}

.form-group {
    margin-bottom: var(--spacing-lg);
    width: 100%;
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 0.9375rem;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 1rem;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
    font-family: inherit;
    box-sizing: border-box;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-text-muted);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
    max-width: 100%;
}

.form-error {
    display: none;
    color: var(--color-error);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

.form-group.error .form-error {
    display: block;
}

.form-group.error .form-input,
.form-group.error .form-textarea {
    border-color: var(--color-error);
}

.form-success {
    display: none;
    padding: var(--spacing-md);
    background-color: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: var(--radius-md);
    color: var(--color-success);
    margin-bottom: var(--spacing-lg);
}

.form-success.show {
    display: block;
}

/* ===================================
   FOOTER
   =================================== */
.footer {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding-block: var(--spacing-2xl);
}

.footer__content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    width: 100%;
}

.footer__brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: 1.25rem;
}

.footer__logo svg {
    color: var(--color-primary);
}

.footer__description {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.footer__links {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    width: 100%;
}

.footer__section h4 {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
    font-size: 1rem;
}

.footer__section ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer__section a {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    transition: color var(--transition-base);
}

.footer__section a:hover {
    color: var(--color-primary-light);
}

.footer__bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    width: 100%;
}

.footer__social {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.footer__social a {
    color: var(--color-text-secondary);
    transition: color var(--transition-base), transform var(--transition-base);
}

.footer__social a:hover {
    color: var(--color-primary-light);
    transform: translateY(-2px);
}

/* ===================================
   UTILITIES
   =================================== */
.text-center {
    text-align: center;
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

/* Animation reveal au scroll */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Accessibilité - Skip to content */
.skip-to-content {
    position: absolute;
    top: -100%;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-md);
    text-decoration: none;
    z-index: 9999;
}

.skip-to-content:focus {
    top: 0;
}

/* Focus visible amélioré */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ===================================
   MEDIA QUERIES - RESPONSIVE DESIGN
   Mobile First Approach
   =================================== */

/* Mobile strict (< 640px) */
@media (max-width: 639px) {
    :root {
        --container-padding: 1rem;
        --spacing-3xl: 3rem;
    }

    .container {
        padding-inline: 1rem;
        width: 100%;
        overflow-x: hidden;
    }

    .problems,
    .modules,
    .deployment,
    .offers {
        grid-template-columns: 1fr;
        padding-inline: 0;
    }

    .hero__cta {
        flex-direction: column;
        width: 100%;
    }

    .hero__cta .btn {
        width: 100%;
        max-width: 100%;
    }

    .nav__menu {
        width: 100%;
        right: -100%;
    }

    .solution {
        grid-template-columns: 1fr;
    }

    .contact {
        grid-template-columns: 1fr;
    }

    .footer__links {
        grid-template-columns: 1fr;
    }
}

/* Tablettes (640px - 1023px) */
@media (min-width: 640px) and (max-width: 1023px) {
    .nav__toggle {
        display: none;
    }

    .nav__menu {
        position: static;
        width: auto;
        height: auto;
        background: none;
        box-shadow: none;
        padding: 0;
        flex-direction: row;
        align-items: center;
    }

    .nav__list {
        flex-direction: row;
        margin-top: 0;
    }

    .nav__cta {
        margin-top: 0;
        margin-left: var(--spacing-md);
    }

    .problems {
        grid-template-columns: repeat(2, 1fr);
    }

    .modules {
        grid-template-columns: repeat(2, 1fr);
    }

    .deployment {
        grid-template-columns: repeat(2, 1fr);
    }

    .offers {
        grid-template-columns: repeat(2, 1fr);
    }

    .solution {
        grid-template-columns: 1fr 1fr;
    }

    .contact {
        grid-template-columns: 1fr 1fr;
    }

    .footer__content {
        grid-template-columns: 2fr 1fr;
    }

    .footer__links {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
    .nav__toggle {
        display: none;
    }

    .nav__menu {
        position: static;
        width: auto;
        height: auto;
        background: none;
        box-shadow: none;
        padding: 0;
        flex-direction: row;
        align-items: center;
    }

    .nav__list {
        flex-direction: row;
        margin-top: 0;
    }

    .nav__cta {
        margin-top: 0;
        margin-left: var(--spacing-md);
    }

    .hero__cta {
        flex-direction: row;
    }

    .problems {
        grid-template-columns: repeat(3, 1fr);
    }

    .modules {
        grid-template-columns: repeat(3, 1fr);
    }

    .deployment {
        grid-template-columns: repeat(4, 1fr);
    }

    .offers {
        grid-template-columns: repeat(2, 1fr);
    }

    .solution {
        grid-template-columns: 1fr 1fr;
    }

    .contact {
        grid-template-columns: 1fr 2fr;
    }

    .footer__content {
        grid-template-columns: 2fr 3fr;
    }

    .footer__links {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer__bottom {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

/* Large Desktop (1280px+) */
@media (min-width: 1280px) {
    .modules {
        grid-template-columns: repeat(3, 1fr);
    }

    .offers {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Extra Large Desktop (1536px+) */
@media (min-width: 1536px) {
    .modules {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Ultra Wide (1920px+) */
@media (min-width: 1920px) {
    .container {
        max-width: 1600px;
    }

    .modules {
        grid-template-columns: repeat(5, 1fr);
    }
}

/* ===================================
   ACCESSIBILITY & PREFERENCES
   =================================== */

/* Préférence pour mouvement réduit */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --color-border: #ffffff;
    }

    .btn--primary,
    .btn--accent {
        border: 2px solid white;
    }
}

/* Print styles */
@media print {
    .header,
    .nav,
    .hero__cta,
    .btn,
    .contact__form,
    .footer__social {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    .section {
        page-break-inside: avoid;
    }
}

/* Touch devices */
@media (hover: none) and (pointer: coarse) {
    .btn,
    .nav__link,
    .problem-card,
    .module-card,
    .deployment__item,
    .offer-card {
        /* Désactiver les effets hover sur tactile */
        transform: none !important;
    }

    /* Augmenter les zones tactiles */
    .btn,
    .nav__link,
    .faq-question {
        min-height: 44px;
        min-width: 44px;
    }
}