/**
 * CIHANGIR FIZYOLIFE - Main Stylesheet
 * Optimisé pour performance et responsive design
 */

/* ==========================================
   VARIABLES CSS
   ========================================== */
:root {
    /* Couleurs */
    --primary-color: #20C8D9;
    --primary-hover: #1AB5C5;
    --text-dark: #2C3E50;
    --text-light: #7F8C8D;
    --background: #FFFFFF;
    --background-light: #F8F9FA;
    --shadow: rgba(0, 0, 0, 0.1);
    
    /* Typographie */
    --font-main: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;
    --font-size-small: 14px;
    --font-size-large: 18px;
    
    /* Espacements */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 40px;
    --spacing-xl: 60px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Breakpoints */
    --mobile: 576px;
    --tablet: 768px;
    --desktop: 1024px;
    --desktop-large: 1440px;
}

/* ==========================================
   RESET & BASE
   ========================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--background);
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-fast);
}

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

/* ==========================================
   HEADER
   ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--background);
    box-shadow: 0 2px 10px var(--shadow);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.header__container {
    max-width: var(--desktop-large);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

/* Logo */
.header__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    transition: transform var(--transition-fast);
}

.header__logo:hover {
    transform: scale(1.02);
}

.header__logo-image {
    height: 50px;
    width: auto;
}

/* Navigation Desktop */
.header__nav {
    display: none;
    align-items: center;
    gap: var(--spacing-lg);
}

.header__link {
    font-size: var(--font-size-small);
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
    padding: 5px 0;
}

.header__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-normal);
}

.header__link:hover::after,
.header__link--active::after {
    width: 100%;
}

.header__link--active {
    color: var(--primary-color);
}

/* Bouton CTA */
.header__btn {
    background: var(--primary-color);
    color: white;
    padding: 12px 28px;
    border-radius: 50px;
    font-size: var(--font-size-small);
    font-weight: 600;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 15px rgba(32, 200, 217, 0.3);
}

.header__btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(32, 200, 217, 0.4);
}

/* Sélecteur de langue */
.header__lang {
    position: relative;
}

.header__lang-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: var(--font-size-small);
    font-weight: 600;
    color: var(--primary-color);
    padding: 8px 12px;
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.header__lang-btn:hover {
    background: var(--background-light);
}

.header__lang-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 20px var(--shadow);
    padding: 8px;
    min-width: 80px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
}

.header__lang-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.header__lang-option {
    display: block;
    padding: 8px 12px;
    font-size: var(--font-size-small);
    font-weight: 600;
    color: var(--text-dark);
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.header__lang-option:hover {
    background: var(--background-light);
    color: var(--primary-color);
}

/* Menu Hamburger */
.header__hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 30px;
    height: 24px;
    z-index: 1001;
    transition: transform var(--transition-normal);
}

.header__hamburger span {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px;
    transition: all var(--transition-normal);
}

.header__hamburger.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.header__hamburger.active span:nth-child(2) {
    opacity: 0;
}

.header__hamburger.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ==========================================
   MENU MOBILE
   ========================================== */
.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100vh;
    z-index: 999;
    pointer-events: none;
}

.mobile-menu.active {
    pointer-events: auto;
}

.mobile-menu__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.mobile-menu.active .mobile-menu__overlay {
    opacity: 1;
}

.mobile-menu__content {
    position: absolute;
    top: 0;
    right: 0;
    width: 280px;
    max-width: 85%;
    height: 100%;
    background: white;
    padding: 100px 30px 30px;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
    box-shadow: -5px 0 20px var(--shadow);
}

.mobile-menu.active .mobile-menu__content {
    transform: translateX(0);
}

.mobile-menu__link {
    display: block;
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-dark);
    padding: 15px 0;
    border-bottom: 1px solid var(--background-light);
    transition: all var(--transition-fast);
}

.mobile-menu__link:hover,
.mobile-menu__link--active {
    color: var(--primary-color);
    padding-left: 10px;
}

.mobile-menu__btn {
    display: block;
    background: var(--primary-color);
    color: white;
    padding: 15px 0;
    text-align: center;
    border-radius: 50px;
    font-weight: 600;
    margin: 30px 0 20px;
    transition: all var(--transition-normal);
}

.mobile-menu__btn:hover {
    background: var(--primary-hover);
    transform: scale(1.02);
}

.mobile-menu__lang {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.mobile-menu__lang-btn {
    flex: 1;
    padding: 10px;
    text-align: center;
    font-weight: 600;
    font-size: var(--font-size-small);
    border: 2px solid var(--background-light);
    border-radius: 8px;
    color: var(--text-dark);
    transition: all var(--transition-fast);
}

.mobile-menu__lang-btn.active,
.mobile-menu__lang-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(32, 200, 217, 0.1);
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero {
    position: relative;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(32, 200, 217, 0.1) 0%, rgba(32, 200, 217, 0.05) 100%);
    background-image: url('../images/cover.jpg');
    background-size: cover;
    background-position: center;
    background-blend-mode: overlay;
    overflow: hidden;
}

.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.45) 100%);
}

.hero__content {
    position: relative;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    max-width: 800px;
    animation: fadeInUp 1s ease;
}

.hero__title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
    letter-spacing: 2px;
    margin-bottom: var(--spacing-sm);
}

.hero__subtitle {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

.hero__description {
    font-size: 18px;
    color: var(--text-dark);
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    opacity: 0.9;
}

.hero__btn {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 15px 40px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 16px;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 20px rgba(32, 200, 217, 0.3);
}

.hero__btn:hover {
    background: var(--primary-hover);
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(32, 200, 217, 0.4);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================
   UTILITIES
   ========================================== */
.container {
    max-width: var(--desktop-large);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
}

.text-center {
    text-align: center;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ==========================================
   LANGUAGE MODAL
   ========================================== */
.language-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
}

.language-modal.active {
    display: flex;
}

.language-modal__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    animation: fadeIn 0.3s ease;
}

.language-modal__content {
    position: relative;
    background: white;
    border-radius: 20px;
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 90%;
    box-shadow: 0 10px 60px rgba(0, 0, 0, 0.3);
    animation: scaleIn 0.4s ease;
}

.language-modal__header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.language-modal__logo {
    height: 80px;
    width: auto;
    margin: 0 auto var(--spacing-md);
}

.language-modal__subtitle {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

.language-modal__options {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
}

.language-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border: 2px solid var(--background-light);
    border-radius: 12px;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.language-option:hover {
    border-color: var(--primary-color);
    background: rgba(32, 200, 217, 0.05);
    transform: translateX(5px);
}

.language-option__flag {
    width: 60px;
    height: 45px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.language-option__name {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from { 
        opacity: 0;
        transform: scale(0.9);
    }
    to { 
        opacity: 1;
        transform: scale(1);
    }
}