/* ============================================
   IDSW Institut - Styles du Header
   Thème: Couleurs du drapeau allemand + Vert
   ============================================ */

:root {
    --black: #000000;
    --red: #DD0000;
    --gold: #FFCC00;
    --green: #2E7D32;
    --green-light: #4CAF50;
    --green-dark: #1B5E20;
    --white: #FFFFFF;
    --gray-100: #F5F5F5;
    --gray-200: #E0E0E0;
    --gray-300: #BDBDBD;
    --gray-600: #757575;
    --gray-800: #333333;
    --font-primary: 'Poppins', sans-serif;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 15px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 50px;
}

/* ============================================
   TOP BAR
   ============================================ */
.top-bar {
    background-color: var(--black);
    color: var(--white);
    padding: 8px 0;
    font-size: 0.85rem;
    border-bottom: 2px solid var(--gold);
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.top-bar-left,
.top-bar-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.top-bar-link {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    font-weight: 400;
}

.top-bar-link:hover {
    color: var(--gold);
}

.top-bar-link i {
    color: var(--gold);
    font-size: 0.85rem;
}

.top-bar-social {
    display: flex;
    align-items: center;
    gap: 12px;
}

.top-bar-social a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.9rem;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.08);
}

.top-bar-social a:hover {
    color: var(--black);
    background: var(--gold);
}

/* ============================================
   HEADER PRINCIPAL
   ============================================ */
.main-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--white);
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

.main-header.header-scrolled {
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--gray-200);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0;
    height: 80px;
}

/* ============================================
   LOGO
   ============================================ */
.logo {
    flex-shrink: 0;
}

.logo a {
    text-decoration: none;
    display: block;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: -0.5px;
    margin: 0;
    line-height: 1;
}

.logo-idsw {
    color: var(--black);
    font-weight: 900;
}

.logo-institut {
    color: var(--red);
    font-weight: 700;
    font-size: 0.9em;
    margin-left: 2px;
}

/* ============================================
   MENU DE NAVIGATION
   ============================================ */
.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 5px;
    margin: 0;
    padding: 0;
    height: 100%;
}

.nav-menu > li {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--gray-800);
    padding: 10px 14px;
    border-radius: var(--radius-lg);
    transition: var(--transition);
    font-weight: 500;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    font-family: var(--font-primary);
}

.nav-menu a:hover {
    color: var(--red);
    background-color: rgba(221, 0, 0, 0.05);
}

.nav-menu a.active {
    color: var(--white);
    background-color: var(--red);
    font-weight: 600;
}

/* ============================================
   DROPDOWN MENU
   ============================================ */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    cursor: pointer;
}

.dropdown-arrow {
    font-size: 0.65rem;
    transition: transform 0.3s ease;
}

.dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background-color: var(--white);
    min-width: 240px;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    list-style: none;
    padding: 8px 0;
    z-index: 1001;
    border-top: 3px solid var(--red);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(5px);
}

.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid var(--red);
}

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    padding: 12px 20px;
    border-radius: 0;
    font-weight: 400;
    font-size: 0.9rem;
    color: var(--gray-800);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
}

.dropdown-menu a i {
    color: var(--red);
    font-size: 0.9rem;
    width: 20px;
    text-align: center;
}

.dropdown-menu a:hover {
    background-color: var(--gray-100);
    color: var(--red);
    padding-left: 25px;
}

/* ============================================
   BOUTON COURS GRATUIT
   ============================================ */
.nav-cta {
    margin-left: 5px;
}

.btn-nav-free-course {
    background: linear-gradient(135deg, var(--red), #C62828);
    color: var(--white) !important;
    padding: 10px 20px !important;
    border-radius: var(--radius-lg) !important;
    font-weight: 600 !important;
    font-size: 0.9rem !important;
    box-shadow: 0 4px 15px rgba(221, 0, 0, 0.3);
    transition: var(--transition) !important;
    gap: 8px !important;
}

.btn-nav-free-course i {
    font-size: 0.95rem;
}

.btn-nav-free-course:hover {
    background: linear-gradient(135deg, #C62828, #B71C1C) !important;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(221, 0, 0, 0.4) !important;
    color: var(--white) !important;
}

/* ============================================
   SÉLECTEUR DE LANGUE (LISTE DÉROULANTE)
   ============================================ */
.nav-language {
    margin-left: 5px;
}

.language-dropdown {
    position: relative;
}

.language-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--gray-100);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-family: var(--font-primary);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-800);
    transition: var(--transition);
    white-space: nowrap;
}

.language-toggle:hover {
    border-color: var(--red);
    background: var(--white);
}

.language-toggle.active {
    border-color: var(--red);
    background: var(--white);
}

.lang-flag {
    font-size: 1.1rem;
    line-height: 1;
}

.lang-code {
    font-weight: 700;
}

.lang-arrow {
    font-size: 0.6rem;
    transition: transform 0.3s ease;
    color: var(--gray-600);
    margin-left: 2px;
}

.language-toggle.active .lang-arrow {
    transform: rotate(180deg);
}

/* Menu déroulant des langues */
.language-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background-color: var(--white);
    min-width: 180px;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    list-style: none;
    padding: 8px 0;
    z-index: 1002;
    border: 1px solid var(--gray-200);
}

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

.language-menu::before {
    content: '';
    position: absolute;
    top: -8px;
    right: 20px;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid var(--white);
    filter: drop-shadow(0 -2px 2px rgba(0,0,0,0.05));
}

.language-menu li {
    margin: 0;
}

.language-menu a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    text-decoration: none;
    color: var(--gray-800);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    font-family: var(--font-primary);
}

.language-menu a:hover {
    background-color: rgba(221, 0, 0, 0.05);
    color: var(--red);
}

.language-menu a.active {
    background-color: rgba(221, 0, 0, 0.08);
    color: var(--red);
    font-weight: 600;
}

.language-menu .lang-flag {
    font-size: 1.2rem;
}

.language-menu .lang-name {
    flex: 1;
}

.lang-check {
    color: var(--green);
    font-size: 0.85rem;
}

/* ============================================
   HAMBURGER MENU MOBILE
   ============================================ */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 5px;
    z-index: 1003;
}

.hamburger-line {
    width: 28px;
    height: 3px;
    background-color: var(--black);
    border-radius: 3px;
    transition: var(--transition);
    transform-origin: center;
}

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

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

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

/* ============================================
   OVERLAY MENU MOBILE
   ============================================ */
.menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.menu-overlay.active {
    opacity: 1;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .hamburger {
        display: flex;
    }
    
    .menu-overlay {
        display: block;
        pointer-events: none;
    }
    
    .menu-overlay.active {
        pointer-events: auto;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 85%;
        max-width: 380px;
        height: 100vh;
        background-color: var(--white);
        flex-direction: column;
        padding: 90px 25px 30px;
        box-shadow: var(--shadow-xl);
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
        overflow-y: auto;
        gap: 5px;
        align-items: stretch;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu > li {
        height: auto;
    }
    
    .nav-menu a {
        padding: 14px 18px;
        font-size: 0.95rem;
        border-radius: var(--radius-sm);
        justify-content: flex-start;
    }
    
    /* Dropdown mobile */
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        padding: 0 0 0 15px;
        display: none;
        min-width: auto;
        background: transparent;
    }
    
    .dropdown.active .dropdown-menu {
        display: block;
    }
    
    .dropdown-menu::before {
        display: none;
    }
    
    .dropdown-menu a {
        padding: 10px 18px;
        font-size: 0.9rem;
    }
    
    /* Bouton cours gratuit mobile */
    .nav-cta {
        margin-top: 5px;
    }
    
    .btn-nav-free-course {
        justify-content: center !important;
        text-align: center;
    }
    
    /* Sélecteur de langue mobile */
    .nav-language {
        margin-top: 10px;
    }
    
    .language-toggle {
        width: 100%;
        justify-content: center;
    }
    
    .language-menu {
        right: auto;
        left: 0;
        width: 100%;
        min-width: auto;
    }
    
    .language-menu::before {
        right: auto;
        left: 50%;
        transform: translateX(-50%);
    }
    
    .top-bar {
        font-size: 0.78rem;
        padding: 6px 0;
    }
    
    .top-bar-content {
        flex-direction: column;
        gap: 5px;
        text-align: center;
    }
    
    .top-bar-left,
    .top-bar-right {
        justify-content: center;
    }
    
    .navbar {
        height: 70px;
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .top-bar-link span {
        display: none;
    }
    
    .top-bar-link i {
        font-size: 1rem;
    }
    
    .top-bar-left,
    .top-bar-right {
        gap: 15px;
    }
    
    .nav-menu {
        width: 100%;
        max-width: 100%;
    }
    
    .logo h1 {
        font-size: 1.3rem;
    }
}

/* ============================================
   BODY SCROLL LOCK
   ============================================ */
body.menu-open {
    overflow: hidden;
}