/* =============================================
   ASNA - Coopérative de produits laitiers au kéfir
   styles.css
   ============================================= */

/* ---------- Variables ---------- */
:root {
    --color-primary: #2E7D32;
    --color-primary-light: #4CAF50;
    --color-cream: #FFF8E1;
    --color-white: #FFFFFF;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-gray-light: #F5F5F5;
    --color-border: #E0E0E0;

    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Open Sans', sans-serif;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);

    --radius: 8px;
    --radius-lg: 16px;
    --transition: 0.3s ease;

    --header-height: 70px;
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    line-height: 1.7;
    background-color: var(--color-white);
}

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

ul {
    list-style: none;
}

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

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    line-height: 1.3;
}

/* ---------- Utilities ---------- */
.container {
    width: 100%;
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.75rem;
    color: var(--color-primary);
}

.section-intro {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 3rem;
    color: var(--color-text-light);
    font-size: 1.05rem;
}

/* =============================================
   HEADER / NAVIGATION
   ============================================= */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: 1000;
    transition: background-color var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.main-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 2px;
    transition: color var(--transition);
}

.site-header.scrolled .nav-logo {
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-white);
    transition: color var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary-light);
    transition: width var(--transition);
}

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

.site-header.scrolled .nav-links a {
    color: var(--color-text);
}

.site-header.scrolled .nav-links a:hover {
    color: var(--color-primary);
}

.nav-cta {
    background-color: var(--color-primary);
    color: var(--color-white) !important;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius);
    transition: background-color var(--transition);
}

.nav-cta:hover {
    background-color: var(--color-primary-light);
}

.nav-cta::after {
    display: none !important;
}

/* Hamburger menu */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.hamburger-line {
    display: block;
    width: 26px;
    height: 3px;
    background-color: var(--color-white);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}

.site-header.scrolled .hamburger-line {
    background-color: var(--color-text);
}

.menu-toggle.active .hamburger-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active .hamburger-line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* =============================================
   HERO
   ============================================= */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1B5E20 0%, #2E7D32 50%, #388E3C 100%);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(255, 248, 225, 0.1) 0%, transparent 60%);
}

.hero-content {
    position: relative;
    text-align: center;
    padding: 2rem 1.5rem;
    max-width: 750px;
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 1.25rem;
    line-height: 1.15;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-btn {
    display: inline-block;
    background-color: var(--color-cream);
    color: var(--color-primary);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    padding: 0.9rem 2.5rem;
    border-radius: var(--radius);
    transition: transform var(--transition), box-shadow var(--transition);
}

.hero-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* =============================================
   À PROPOS
   ============================================= */
.about-section {
    padding: 6rem 0;
    background-color: var(--color-white);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.value-card {
    text-align: center;
    padding: 2.5rem 1.5rem;
    background-color: var(--color-gray-light);
    border-radius: var(--radius-lg);
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.value-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    color: var(--color-white);
    font-size: 1.6rem;
    border-radius: 50%;
}

.value-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.value-card p {
    font-size: 0.95rem;
    color: var(--color-text-light);
}

/* =============================================
   PRODUITS
   ============================================= */
.products-section {
    padding: 6rem 0;
    background-color: var(--color-cream);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.product-card {
    text-align: center;
    padding: 2.5rem 1.5rem;
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.product-image {
    width: 90px;
    height: 90px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: var(--color-white);
    font-size: 2rem;
    border-radius: 50%;
}

.product-card h3 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.product-card p {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

/* =============================================
   BIENFAITS
   ============================================= */
.benefits-section {
    padding: 6rem 0;
    background-color: var(--color-white);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.benefit-card {
    text-align: center;
    padding: 2rem 1.25rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition), transform var(--transition);
}

.benefit-card:hover {
    border-color: var(--color-primary-light);
    transform: translateY(-4px);
}

.benefit-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(46, 125, 50, 0.1);
    color: var(--color-primary);
    font-size: 1.5rem;
    border-radius: 50%;
}

.benefit-card h3 {
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.benefit-card p {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

/* =============================================
   PROCESSUS
   ============================================= */
.process-section {
    padding: 6rem 0;
    background-color: var(--color-gray-light);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    position: relative;
}

.process-step {
    text-align: center;
    padding: 2rem 1.25rem;
    position: relative;
}

.step-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: rgba(46, 125, 50, 0.15);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.step-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    color: var(--color-white);
    font-size: 1.5rem;
    border-radius: 50%;
}

.process-step h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.process-step p {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

/* =============================================
   CONTACT
   ============================================= */
.contact-section {
    padding: 6rem 0;
    background-color: var(--color-white);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

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

.form-group label {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: var(--color-text);
}

.form-group input,
.form-group textarea {
    font-family: var(--font-body);
    font-size: 0.95rem;
    padding: 0.75rem 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    outline: none;
    transition: border-color var(--transition);
    resize: vertical;
}

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

.form-group.has-error input,
.form-group.has-error textarea {
    border-color: #E53935;
}

.form-error {
    font-size: 0.8rem;
    color: #E53935;
    margin-top: 0.3rem;
    min-height: 1.2em;
}

.form-submit {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    padding: 0.85rem 2rem;
    background-color: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background-color var(--transition), transform var(--transition);
    align-self: flex-start;
}

.form-submit:hover {
    background-color: var(--color-primary-light);
    transform: translateY(-2px);
}

.form-success {
    font-size: 0.95rem;
    color: var(--color-primary);
    font-weight: 600;
    margin-top: 0.5rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.info-item > i {
    font-size: 1.3rem;
    color: var(--color-primary);
    margin-top: 0.25rem;
    width: 24px;
    text-align: center;
}

.info-item h4 {
    font-size: 1rem;
    margin-bottom: 0.2rem;
    color: var(--color-text);
}

.info-item p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    font-size: 1.1rem;
    transition: background-color var(--transition), transform var(--transition);
}

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

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
    background-color: #1B3A1D;
    color: rgba(255, 255, 255, 0.85);
    padding: 4rem 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 2px;
    margin-bottom: 0.75rem;
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.65);
}

.footer-nav h4,
.footer-legal h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 1rem;
}

.footer-nav a,
.footer-legal a {
    display: block;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.65);
    padding: 0.3rem 0;
    transition: color var(--transition);
}

.footer-nav a:hover,
.footer-legal a:hover {
    color: var(--color-primary-light);
}

.footer-bottom {
    text-align: center;
    padding: 1.5rem 0;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

/* =============================================
   RESPONSIVE - Tablette (max 1024px)
   ============================================= */
@media (max-width: 1024px) {
    .products-grid,
    .benefits-grid,
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-title {
        font-size: 2.6rem;
    }

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

    .footer-brand {
        grid-column: 1 / -1;
    }
}

/* =============================================
   RESPONSIVE - Mobile (max 768px)
   ============================================= */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 320px;
        height: 100vh;
        flex-direction: column;
        justify-content: center;
        gap: 1.5rem;
        background-color: var(--color-white);
        box-shadow: var(--shadow-lg);
        transition: right var(--transition);
        padding: 2rem;
    }

    .nav-links.open {
        right: 0;
    }

    .nav-links a {
        color: var(--color-text);
        font-size: 1.1rem;
    }

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

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.7rem;
    }

    .about-section,
    .products-section,
    .benefits-section,
    .process-section,
    .contact-section {
        padding: 4rem 0;
    }

    .values-grid,
    .products-grid,
    .benefits-grid,
    .process-steps {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin-left: auto;
        margin-right: auto;
    }

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

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand {
        grid-column: auto;
    }

    .form-submit {
        width: 100%;
        text-align: center;
    }
}