/**
 * MuseFlow Unified Navigation Bar - Dark Theme
 * V10.6.0 - Dark theme matching footer design
 */

.unified-navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    padding: 0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.unified-navbar.navbar-hidden {
    transform: translateY(-100%);
}

.unified-navbar.navbar-scrolled {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
}

.unified-nav-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0.75rem 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.unified-nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: #e5e5e5;
    font-weight: 700;
    font-size: 1.25rem;
    transition: all 0.3s;
}

.unified-nav-logo:hover {
    transform: translateY(-2px);
    color: var(--primary, #8B5CF6);
}

.unified-nav-logo img {
    width: 20px;
    height: 20px;
    border-radius: 12px;
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.3);
}

.unified-nav-links {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.unified-nav-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: #E5E5E5;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.25s ease;
    font-size: 1rem;
    position: relative;
    font-weight: 400;
}

.unified-nav-links a:hover {
    background: rgba(139, 92, 246, 0.12);
    color: #8B5CF6;
    transform: translateY(-2px);
}

.unified-nav-links a.active {
    background: rgba(139, 92, 246, 0.15);
    color: #8B5CF6;
    border: 1px solid rgba(139, 92, 246, 0.25);
}

/* Tooltip on hover */
.unified-nav-links a::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: -35px;
    left: 50%;
    transform: translateX(-50%) scale(0.8);
    background: var(--gray-900, #111827);
    color: white;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    font-size: 0.8125rem;
    font-weight: 600;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s;
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.unified-nav-links a:hover::after {
    opacity: 1;
    transform: translateX(-50%) scale(1);
}

.unified-nav-actions {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.unified-nav-btn {
    background: transparent;
    border: 1px solid rgba(139, 92, 246, 0.2);
    width: 22px;
    height: 22px;
    border-radius: 8px;
    color: #9CA3AF;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s ease;
    font-size: 1rem;
    position: relative;
    font-weight: 400;
}

.unified-nav-btn:hover {
    background: rgba(139, 92, 246, 0.12);
    border-color: rgba(139, 92, 246, 0.35);
    transform: translateY(-2px);
    color: #8B5CF6;
}

.unified-nav-btn.primary {
    background: transparent;
    border: 1px solid #8B5CF6;
    color: #8B5CF6;
}

.unified-nav-btn.primary:hover {
    background: rgba(139, 92, 246, 0.15);
    border-color: #8B5CF6;
    color: #8B5CF6;
}

/* Icon styling - Material Icons + FontAwesome fallback */
.unified-nav-btn i,
.unified-nav-links a i,
.unified-nav-btn .material-icons,
.unified-nav-links a .material-icons {
    font-size: 20px;
    line-height: 1;
    display: inline-block;
    font-weight: 400;
    opacity: 1;
    -webkit-font-smoothing: antialiased;
    color: inherit;
}

/* Rotating animation for loading icons */
.material-icons.rotating {
    animation: rotate 1s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Attachment/File icons - 28px */
.fas.fa-box-archive,
.fas.fa-folder,
.fas.fa-folder-open,
.fas.fa-file-alt,
.fas.fa-paperclip,
.material-icons.attachment-icon {
    font-size: 28px !important;
}
    -moz-osx-font-smoothing: grayscale;
}

.unified-nav-btn:hover i,
.unified-nav-links a:hover i {
    opacity: 1;
    transform: scale(1.05);
}

/* Tooltip for action buttons */
.unified-nav-btn::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: -35px;
    left: 50%;
    transform: translateX(-50%) scale(0.8);
    background: var(--gray-900, #111827);
    color: white;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s;
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.unified-nav-btn:hover::after {
    opacity: 1;
    transform: translateX(-50%) scale(1);
}

/* Mobile Menu Toggle Button */
.mobile-menu-toggle {
    display: none;
    width: 22px;
    height: 22px;
    background: none;
    border: none;
    color: #e5e5e5;
    font-size: 1.5rem;
    cursor: pointer;
    border-radius: 12px;
    transition: all 0.3s;
}

.mobile-menu-toggle:hover {
    background: rgba(139, 92, 246, 0.2);
    color: var(--primary, #8B5CF6);
}

.mobile-menu-toggle i {
    transition: transform 0.3s;
}

.mobile-menu-toggle.active i {
    transform: rotate(90deg);
}

/* Mobile Responsive */
/* ========================================
   반응형 디자인 - 모바일 (768px 이하)
   ======================================== */
@media (max-width: 768px) {
    .unified-nav-container {
        padding: 0.5rem 1rem;
    }
    
    .unified-nav-logo {
        font-size: 1.1rem;
    }
    
    .unified-nav-logo img {
        width: 18px;
        height: 18px;
    }
    
    /* 모바일에서 아이콘 간격 좁히기 */
    .unified-nav-links {
        gap: 0.25rem;
    }
    
    .unified-nav-links a {
        width: 32px;
        height: 32px;
    }
    
    .unified-nav-links a .material-icons {
        font-size: 18px;
    }
    
    /* Tooltip 숨기기 (모바일에서는 불필요) */
    .unified-nav-links a::after {
        display: none;
    }
}

/* ========================================
   반응형 디자인 - 작은 모바일 (480px 이하)
   ======================================== */
@media (max-width: 480px) {
    .unified-nav-container {
        padding: 0.5rem 0.75rem;
    }
    
    .unified-nav-logo {
        font-size: 1rem;
        gap: 0.5rem;
    }
    
    .unified-nav-logo img {
        width: 16px;
        height: 16px;
    }
    
    .unified-nav-links {
        gap: 0.125rem;
    }
    
    .unified-nav-links a {
        width: 28px;
        height: 28px;
    }
    
    .unified-nav-links a .material-icons {
        font-size: 16px;
    }
    
    .unified-nav-links.mobile-open {
        max-height: 500px;
    }
    
    .unified-nav-links li {
        width: 100%;
        border-bottom: 1px solid var(--gray-100, #F3F4F6);
    }
    
    .unified-nav-links a {
        width: 100%;
        height: 56px;
        justify-content: flex-start;
        padding: 0 1.5rem;
        gap: 1rem;
        border-radius: 0;
        font-size: 1rem;
    }
    
    .unified-nav-links a i {
        font-size: 1.25rem;
    }
    
    .unified-nav-links a::after {
        display: none; /* Hide tooltips on mobile */
    }
    
    /* Mobile Actions - Show all menu items */
    .unified-nav-actions {
        gap: 0.25rem;
        flex-wrap: wrap;
    }
    
    /* Show all navigation action buttons on mobile */
    .unified-nav-actions > * {
        display: flex !important;
    }
    
    .unified-nav-btn {
        width: 20px;
        height: 20px;
        font-size: 0.875rem;
    }
    
    .unified-nav-btn::after {
        display: none; /* Hide tooltips on mobile */
    }
    
    /* Logo */
    .unified-nav-logo span {
        font-size: 1.125rem;
    }
    
    .unified-nav-logo img {
        width: 32px;
        height: 32px;
    }
}