/**
 * FAST XR Dashboard - Styles Header
 *
 * Header avec logo, sélecteur de langue et infos session
 */

/* ==========================================
   HEADER BASE
   ========================================== */

.header {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    height: var(--header-height);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-sticky);
    transition: left var(--transition-base);
}

/* Ajustement quand sidebar collapsed */
.sidebar-collapsed .header {
    left: var(--sidebar-width-collapsed);
}

/* ==========================================
   HEADER LEFT (LOGO)
   ========================================== */

.header-left {
    display: flex;
    align-items: center;
}

.header .logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.header .logo-icon {
    font-size: 32px;
}

.header .logo-content {
    display: flex;
    flex-direction: column;
}

.header .logo-text {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-extrabold);
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    line-height: 1.1;
}

.header .logo-subtitle {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.9);
    font-weight: var(--font-weight-normal);
}

/* ==========================================
   HEADER CENTER
   ========================================== */

.header-center {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* ==========================================
   HEADER RIGHT
   ========================================== */

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

/* ==========================================
   LANGUAGE SELECTOR
   ========================================== */

.language-selector {
    position: relative;
}

.lang-trigger {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
}

.lang-trigger:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
}

.lang-trigger .lang-flag {
    font-size: 20px;
}

.lang-trigger .lang-code {
    font-weight: var(--font-weight-bold);
    text-transform: uppercase;
}

.lang-trigger .lang-arrow {
    font-size: 10px;
    transition: transform var(--transition-fast);
}

.lang-dropdown.open + .lang-trigger .lang-arrow,
.language-selector:focus-within .lang-arrow {
    transform: rotate(180deg);
}

/* Dropdown */
.lang-dropdown {
    position: absolute;
    top: calc(100% + var(--spacing-sm));
    right: 0;
    min-width: 180px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: var(--z-dropdown);
    overflow: hidden;
}

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

.lang-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: left;
}

.lang-option:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.lang-option.active {
    background: rgba(211, 47, 47, 0.15);
    color: var(--primary-red);
}

.lang-option .lang-flag {
    font-size: 20px;
}

.lang-option .lang-name {
    flex: 1;
}

.lang-option .lang-check {
    color: var(--success-green);
    font-weight: var(--font-weight-bold);
}

/* ==========================================
   SESSION INFO
   ========================================== */

.session-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
}

.header-right .session-info {
    align-items: flex-end;
}

.trainer-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.trainer-label {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
}

.trainer-name {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    color: white;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.9);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success-green);
    animation: pulse 2s infinite;
}

.status-dot.disconnected {
    background: var(--error-red);
    animation: none;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.9); }
}

/* ==========================================
   LOGOUT BUTTON
   ========================================== */

.btn-logout {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    color: white;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-logout:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-1px);
}

.btn-logout .logout-icon {
    font-size: 16px;
}

/* ==========================================
   RESPONSIVE - TABLET
   ========================================== */

@media (min-width: 769px) and (max-width: 1024px) {
    .header {
        left: var(--sidebar-width-collapsed);
    }

    .header .logo-subtitle {
        display: none;
    }

    .trainer-label {
        display: none;
    }

    .btn-logout .logout-text {
        display: none;
    }
}

/* ==========================================
   RESPONSIVE - MOBILE
   ========================================== */

@media (max-width: 768px) {
    .header {
        left: 0;
        height: var(--header-height-mobile);
        padding: 0 var(--spacing-md);
        padding-left: 60px; /* Place pour le burger menu */
    }

    .header-left {
        display: none;
    }

    .header-center {
        display: none;
    }

    .header-right {
        flex: 1;
        justify-content: flex-end;
        gap: var(--spacing-md);
    }

    .language-selector {
        order: 1;
    }

    .lang-trigger {
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .lang-trigger .lang-code {
        display: none;
    }

    .session-info {
        order: 2;
    }

    .trainer-info {
        display: none;
    }

    .connection-status .status-text {
        display: none;
    }

    .btn-logout {
        order: 3;
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .btn-logout .logout-text {
        display: none;
    }

    .lang-dropdown {
        right: auto;
        left: 0;
    }
}

/* ==========================================
   SMALL MOBILE
   ========================================== */

@media (max-width: 480px) {
    .header {
        padding-left: 55px;
    }

    .header-right {
        gap: var(--spacing-sm);
    }
}