/* HEADER */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background: var(--glass);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

header.scrolled {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

header.header-hidden {
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-self: start;
    gap: 0.75rem;
}

.logo-icon {
    color: var(--primary);
    display: flex;
    align-items: center;
}

.logo-shield-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    /* Make white background transparent via mix-blend-mode */
    mix-blend-mode: lighten;
    filter: drop-shadow(0 0 6px rgba(107, 33, 214, 0.5));
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1;
}

.logo-text span {
    color: var(--primary);
}

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

.nav-links a {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--white);
}

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

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

.header-actions {
    display: flex;
    align-items: center;
    justify-self: end;
    gap: 1rem;
}

#lang-toggle {
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
}

.mobile-menu-toggle {
    display: none;
    cursor: pointer;
    color: var(--white);
}

/* MAIN LAYOUT */
main {
    padding-top: 0;
}

/* HORIZONTAL SLIDER */
#horizontal-slider-container {
    overflow: hidden;
    width: 100%;
}

.slider-track {
    display: flex;
    width: 200%;
    transition: transform 0.6s ease-in-out;
}

.slider-track > section {
    width: 50%;
    flex-shrink: 0;
    box-sizing: border-box;
}

#features, #notre-processus {
    position: relative;
}

.slider-next-btn, .slider-prev-btn {
    position: absolute;
    bottom: 2rem;
    background: rgba(107, 33, 214, 0.35);
    border: 1px solid rgba(107, 33, 214, 0.55);
    color: var(--white);
    width: 52px;
    height: 52px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: background 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
    z-index: 10;
    box-shadow: 0 0 16px rgba(107, 33, 214, 0.3);
}

.slider-next-btn {
    right: 2rem;
}

.slider-prev-btn {
    left: 2rem;
}

.slider-next-btn:hover, .slider-prev-btn:hover {
    background: rgba(107, 33, 214, 0.65);
    transform: scale(1.12);
    box-shadow: 0 0 24px rgba(107, 33, 214, 0.55);
}

.slider-next-btn svg, .slider-prev-btn svg {
    width: 22px;
    height: 22px;
}

.solution-continue-btn {
    position: absolute;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%) translateX(20px);
    opacity: 0;
    pointer-events: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: linear-gradient(135deg, rgba(107, 33, 214, 0.8), rgba(76, 29, 149, 0.9));
    color: var(--white);
    padding: 0.8rem 1.5rem;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1.1rem;
    text-decoration: none;
    border: 1px solid rgba(139, 92, 246, 0.4);
    box-shadow: 0 8px 32px rgba(107, 33, 214, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                background 0.3s ease, box-shadow 0.3s ease;
    z-index: 10;
}

.solution-continue-btn.is-visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(-50%) translateX(0);
}

.solution-continue-btn:hover {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.9), rgba(91, 33, 182, 1));
    box-shadow: 0 12px 40px rgba(124, 58, 237, 0.6);
    transform: translateY(-50%) translateX(0) scale(1.05);
}

.solution-continue-btn svg {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
}

.solution-continue-btn:hover svg {
    transform: translateX(4px);
}