/* ===========================================
   Component: Header — Soelya
   =========================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 100;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.header__container {
    max-width: var(--max-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header__logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    position: relative;
    overflow: hidden;
}

/* Icône seule (par défaut) */
.header__logo-img--icon {
    height: 32px;
    width: auto;
    transition: opacity 0.4s ease, transform 0.4s ease;
}

/* Logo complet (soelya.png) — caché par défaut */
.header__logo-img--full {
    height: 28px;
    width: auto;
    position: absolute;
    left: 0;
    opacity: 0;
    transform: translateX(-8px) scale(0.9);
    transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1), transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* En mode chat : swap animé */
body.chat-active .header__logo-img--icon {
    opacity: 0;
    transform: scale(0.6) rotate(-10deg);
}

body.chat-active .header__logo-img--full {
    position: relative;
    opacity: 1;
    transform: translateX(0) scale(1);
}

.header__nav {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.header__nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.header__nav-link:hover {
    color: var(--color-text-primary);
}

.header__nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    border-radius: var(--radius-full);
    transition: width var(--transition-base);
}

.header__nav-link:hover::after {
    width: 100%;
}