/* Tab Navigation - integrated into header */
.tabs-nav {
    display: flex;
    gap: clamp(10px, 2vw, 24px);
    padding: 0.38rem 0.8rem;
    background: var(--glass-bg);
    border-radius: var(--card-radius);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow-x: auto;
    white-space: nowrap;
    scrollbar-width: none; /* Firefox */
}

.tabs::-webkit-scrollbar {
    display: none; /* Chrome/Safari */
}

.tabs::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent, var(--accent-glow), transparent);
    animation: tabGlow 4s ease-in-out infinite;
}

.tab-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    padding: 0.42rem 0.9rem;
    cursor: pointer;
    position: relative;
    transition: var(--transition-fast);
    border-radius: 0.7rem;
    letter-spacing: 0.025em;
    z-index: 2;
    white-space: nowrap;
    flex: 1 1 auto;
    min-width: 0;
}

.tab-btn:hover {
    color: var(--text-primary);
    background: var(--card-bg-hover);
    border-color: var(--card-border);
    box-shadow: var(--shadow-sm);
}

.tab-btn.active {
    color: var(--text-primary);
    font-weight: 600;
    background: var(--card-bg-hover);
    border-color: var(--accent-color);
    box-shadow: 0 0 20px var(--accent-glow), var(--shadow-sm);
}

@keyframes tabGlow {
    0%, 100% {
        opacity: 0.3;
        transform: translateX(-100%);
    }
    50% {
        opacity: 0.8;
        transform: translateX(100%);
    }
}

/* Removed green bar indicator */
@keyframes slideIn {
    from { width: 0; }
    to { width: 100%; }
}

@media (max-width: 640px) {
    .tabs-nav {
        width: 100%;
        gap: 0.25rem;
    }

    .tab-btn {
        font-size: 0.82rem;
        padding: 0.42rem 0.7rem;
        flex: 1 1 calc(33.33% - 0.2rem);
    }
}