/**
 * Site Header Layout
 * FIX: Clean separation from navigation, no overlap
 */

/* =============================================================================
   HEADER CONTAINER - FIXED HEIGHT, NO OVERLAP
   ============================================================================= */

.site-header {
    background-color: var(--color-surface);
    border-bottom: var(--border-width-2) solid var(--color-border);
    box-shadow: var(--shadow-sm);
    position: relative;
    z-index: var(--z-fixed);
    
    /* Fixed height - no margin conflicts */
    min-height: 70px;
    padding: var(--space-3) 0;
    
    /* Clear separation from navigation - NO overlap */
    margin-bottom: 0;
    border-bottom-width: var(--border-width-2);
}

/* Clear separation line between header and navigation */
.site-header::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--color-border);
    z-index: 1;
}

.site-header .container-fluid {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--space-6);
    gap: var(--space-6);
    max-width: 100%;
}

/* =============================================================================
   BRAND & LOGO
   ============================================================================= */

.brand-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--color-primary);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    text-decoration: none;
    transition: var(--transition-colors);
    flex-shrink: 0;
}

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

.brand-link .header-icon {
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
    transition: var(--transition-transform), var(--transition-colors);
}

.brand-link:hover .header-icon {
    transform: scale(1.05);
    color: var(--color-primary-hover);
}

.beta-badge {
    background: linear-gradient(135deg, #f97316 0%, #fb923c 100%);
    color: white;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
    box-shadow: var(--shadow-sm);
}

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

.header-right-section {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    flex-shrink: 0;
    margin-left: auto;
}

/* Global Search */
.global-search-form {
    max-width: 250px;
}

.site-header .form-control,
.site-header input[type="search"],
#globalSearch {
    background-color: var(--color-background);
    border-color: var(--color-border);
    color: var(--color-text);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: var(--transition-colors), var(--transition-shadow);
}

.site-header .form-control:focus,
.site-header input[type="search"]:focus,
#globalSearch:focus {
    background-color: var(--color-surface);
    border-color: var(--color-primary);
    color: var(--color-text);
    box-shadow: var(--shadow-focus);
}

.site-header .form-control::placeholder,
.site-header input[type="search"]::placeholder,
#globalSearch::placeholder {
    color: var(--color-text-muted);
}

/* Search Button */
.site-header .btn-outline-secondary {
    border-color: var(--color-border);
    color: var(--color-text-secondary);
}

.site-header .btn-outline-secondary:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

/* =============================================================================
   NOTIFICATION BADGE
   ============================================================================= */

.notification-badge {
    position: relative;
}

.notification-badge .badge {
    position: absolute;
    top: -8px;
    right: -8px;
    min-width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-danger);
    color: white;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-full);
    padding: 0 var(--space-1);
    box-shadow: var(--shadow-sm);
}

/* =============================================================================
   THEME TOGGLE BUTTON
   ============================================================================= */

#themeToggle,
.theme-toggle {
    position: relative;
    width: 44px;
    height: 44px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-surface);
    border: var(--border-width-1) solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    cursor: pointer;
    transition: var(--transition-colors), var(--transition-shadow);
    flex-shrink: 0;
}

#themeToggle:hover,
.theme-toggle:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

#themeToggle i,
.theme-toggle i {
    font-size: var(--font-size-lg);
}

/* Theme Toggle Mount Point */
#headerThemeToggleMount {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

/* =============================================================================
   BLOCKCHAIN CONNECTION STATUS
   ============================================================================= */

.blockchain-status {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background-color: var(--color-success-subtle);
    border: var(--border-width-1) solid var(--color-success);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-success);
}

.blockchain-status.disconnected {
    background-color: var(--color-danger-subtle);
    border-color: var(--color-danger);
    color: var(--color-danger);
}

.blockchain-status-icon {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background-color: currentColor;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* =============================================================================
   RESPONSIVE DESIGN
   ============================================================================= */

@media (max-width: 1024px) {
    .site-header .container-fluid {
        gap: var(--space-4);
    }
    
    .header-right-section {
        gap: var(--space-3);
    }
    
    /* Hide search on smaller screens */
    #globalSearchForm {
        display: none;
    }
}

@media (max-width: 768px) {
    .site-header {
        min-height: 60px;
        padding: var(--space-2) 0;
    }
    
    .brand-link {
        font-size: var(--font-size-lg);
    }
    
    .brand-link .header-icon {
        font-size: var(--font-size-xl);
    }
    
    .beta-badge {
        display: none;
    }
    
    .header-right-section {
        gap: var(--space-2);
    }
    
    .blockchain-status {
        padding: var(--space-1) var(--space-2);
        font-size: var(--font-size-xs);
    }
}